2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_pcb.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_uio.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_indata.h>
52 #include <netinet/sctp_bsd_addr.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_crc32.h>
55 #include <netinet/sctp_kdtrace.h>
56 #if defined(INET) || defined(INET6)
57 #include <netinet/udp.h>
59 #include <netinet/udp_var.h>
60 #include <machine/in_cksum.h>
62 #define SCTP_MAX_GAPS_INARRAY 4
64 uint8_t right_edge; /* mergable on the right edge */
65 uint8_t left_edge; /* mergable on the left edge */
68 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
71 const struct sack_track sack_array[256] = {
72 {0, 0, 0, 0, /* 0x00 */
79 {1, 0, 1, 0, /* 0x01 */
86 {0, 0, 1, 0, /* 0x02 */
93 {1, 0, 1, 0, /* 0x03 */
100 {0, 0, 1, 0, /* 0x04 */
107 {1, 0, 2, 0, /* 0x05 */
114 {0, 0, 1, 0, /* 0x06 */
121 {1, 0, 1, 0, /* 0x07 */
128 {0, 0, 1, 0, /* 0x08 */
135 {1, 0, 2, 0, /* 0x09 */
142 {0, 0, 2, 0, /* 0x0a */
149 {1, 0, 2, 0, /* 0x0b */
156 {0, 0, 1, 0, /* 0x0c */
163 {1, 0, 2, 0, /* 0x0d */
170 {0, 0, 1, 0, /* 0x0e */
177 {1, 0, 1, 0, /* 0x0f */
184 {0, 0, 1, 0, /* 0x10 */
191 {1, 0, 2, 0, /* 0x11 */
198 {0, 0, 2, 0, /* 0x12 */
205 {1, 0, 2, 0, /* 0x13 */
212 {0, 0, 2, 0, /* 0x14 */
219 {1, 0, 3, 0, /* 0x15 */
226 {0, 0, 2, 0, /* 0x16 */
233 {1, 0, 2, 0, /* 0x17 */
240 {0, 0, 1, 0, /* 0x18 */
247 {1, 0, 2, 0, /* 0x19 */
254 {0, 0, 2, 0, /* 0x1a */
261 {1, 0, 2, 0, /* 0x1b */
268 {0, 0, 1, 0, /* 0x1c */
275 {1, 0, 2, 0, /* 0x1d */
282 {0, 0, 1, 0, /* 0x1e */
289 {1, 0, 1, 0, /* 0x1f */
296 {0, 0, 1, 0, /* 0x20 */
303 {1, 0, 2, 0, /* 0x21 */
310 {0, 0, 2, 0, /* 0x22 */
317 {1, 0, 2, 0, /* 0x23 */
324 {0, 0, 2, 0, /* 0x24 */
331 {1, 0, 3, 0, /* 0x25 */
338 {0, 0, 2, 0, /* 0x26 */
345 {1, 0, 2, 0, /* 0x27 */
352 {0, 0, 2, 0, /* 0x28 */
359 {1, 0, 3, 0, /* 0x29 */
366 {0, 0, 3, 0, /* 0x2a */
373 {1, 0, 3, 0, /* 0x2b */
380 {0, 0, 2, 0, /* 0x2c */
387 {1, 0, 3, 0, /* 0x2d */
394 {0, 0, 2, 0, /* 0x2e */
401 {1, 0, 2, 0, /* 0x2f */
408 {0, 0, 1, 0, /* 0x30 */
415 {1, 0, 2, 0, /* 0x31 */
422 {0, 0, 2, 0, /* 0x32 */
429 {1, 0, 2, 0, /* 0x33 */
436 {0, 0, 2, 0, /* 0x34 */
443 {1, 0, 3, 0, /* 0x35 */
450 {0, 0, 2, 0, /* 0x36 */
457 {1, 0, 2, 0, /* 0x37 */
464 {0, 0, 1, 0, /* 0x38 */
471 {1, 0, 2, 0, /* 0x39 */
478 {0, 0, 2, 0, /* 0x3a */
485 {1, 0, 2, 0, /* 0x3b */
492 {0, 0, 1, 0, /* 0x3c */
499 {1, 0, 2, 0, /* 0x3d */
506 {0, 0, 1, 0, /* 0x3e */
513 {1, 0, 1, 0, /* 0x3f */
520 {0, 0, 1, 0, /* 0x40 */
527 {1, 0, 2, 0, /* 0x41 */
534 {0, 0, 2, 0, /* 0x42 */
541 {1, 0, 2, 0, /* 0x43 */
548 {0, 0, 2, 0, /* 0x44 */
555 {1, 0, 3, 0, /* 0x45 */
562 {0, 0, 2, 0, /* 0x46 */
569 {1, 0, 2, 0, /* 0x47 */
576 {0, 0, 2, 0, /* 0x48 */
583 {1, 0, 3, 0, /* 0x49 */
590 {0, 0, 3, 0, /* 0x4a */
597 {1, 0, 3, 0, /* 0x4b */
604 {0, 0, 2, 0, /* 0x4c */
611 {1, 0, 3, 0, /* 0x4d */
618 {0, 0, 2, 0, /* 0x4e */
625 {1, 0, 2, 0, /* 0x4f */
632 {0, 0, 2, 0, /* 0x50 */
639 {1, 0, 3, 0, /* 0x51 */
646 {0, 0, 3, 0, /* 0x52 */
653 {1, 0, 3, 0, /* 0x53 */
660 {0, 0, 3, 0, /* 0x54 */
667 {1, 0, 4, 0, /* 0x55 */
674 {0, 0, 3, 0, /* 0x56 */
681 {1, 0, 3, 0, /* 0x57 */
688 {0, 0, 2, 0, /* 0x58 */
695 {1, 0, 3, 0, /* 0x59 */
702 {0, 0, 3, 0, /* 0x5a */
709 {1, 0, 3, 0, /* 0x5b */
716 {0, 0, 2, 0, /* 0x5c */
723 {1, 0, 3, 0, /* 0x5d */
730 {0, 0, 2, 0, /* 0x5e */
737 {1, 0, 2, 0, /* 0x5f */
744 {0, 0, 1, 0, /* 0x60 */
751 {1, 0, 2, 0, /* 0x61 */
758 {0, 0, 2, 0, /* 0x62 */
765 {1, 0, 2, 0, /* 0x63 */
772 {0, 0, 2, 0, /* 0x64 */
779 {1, 0, 3, 0, /* 0x65 */
786 {0, 0, 2, 0, /* 0x66 */
793 {1, 0, 2, 0, /* 0x67 */
800 {0, 0, 2, 0, /* 0x68 */
807 {1, 0, 3, 0, /* 0x69 */
814 {0, 0, 3, 0, /* 0x6a */
821 {1, 0, 3, 0, /* 0x6b */
828 {0, 0, 2, 0, /* 0x6c */
835 {1, 0, 3, 0, /* 0x6d */
842 {0, 0, 2, 0, /* 0x6e */
849 {1, 0, 2, 0, /* 0x6f */
856 {0, 0, 1, 0, /* 0x70 */
863 {1, 0, 2, 0, /* 0x71 */
870 {0, 0, 2, 0, /* 0x72 */
877 {1, 0, 2, 0, /* 0x73 */
884 {0, 0, 2, 0, /* 0x74 */
891 {1, 0, 3, 0, /* 0x75 */
898 {0, 0, 2, 0, /* 0x76 */
905 {1, 0, 2, 0, /* 0x77 */
912 {0, 0, 1, 0, /* 0x78 */
919 {1, 0, 2, 0, /* 0x79 */
926 {0, 0, 2, 0, /* 0x7a */
933 {1, 0, 2, 0, /* 0x7b */
940 {0, 0, 1, 0, /* 0x7c */
947 {1, 0, 2, 0, /* 0x7d */
954 {0, 0, 1, 0, /* 0x7e */
961 {1, 0, 1, 0, /* 0x7f */
968 {0, 1, 1, 0, /* 0x80 */
975 {1, 1, 2, 0, /* 0x81 */
982 {0, 1, 2, 0, /* 0x82 */
989 {1, 1, 2, 0, /* 0x83 */
996 {0, 1, 2, 0, /* 0x84 */
1003 {1, 1, 3, 0, /* 0x85 */
1010 {0, 1, 2, 0, /* 0x86 */
1017 {1, 1, 2, 0, /* 0x87 */
1024 {0, 1, 2, 0, /* 0x88 */
1031 {1, 1, 3, 0, /* 0x89 */
1038 {0, 1, 3, 0, /* 0x8a */
1045 {1, 1, 3, 0, /* 0x8b */
1052 {0, 1, 2, 0, /* 0x8c */
1059 {1, 1, 3, 0, /* 0x8d */
1066 {0, 1, 2, 0, /* 0x8e */
1073 {1, 1, 2, 0, /* 0x8f */
1080 {0, 1, 2, 0, /* 0x90 */
1087 {1, 1, 3, 0, /* 0x91 */
1094 {0, 1, 3, 0, /* 0x92 */
1101 {1, 1, 3, 0, /* 0x93 */
1108 {0, 1, 3, 0, /* 0x94 */
1115 {1, 1, 4, 0, /* 0x95 */
1122 {0, 1, 3, 0, /* 0x96 */
1129 {1, 1, 3, 0, /* 0x97 */
1136 {0, 1, 2, 0, /* 0x98 */
1143 {1, 1, 3, 0, /* 0x99 */
1150 {0, 1, 3, 0, /* 0x9a */
1157 {1, 1, 3, 0, /* 0x9b */
1164 {0, 1, 2, 0, /* 0x9c */
1171 {1, 1, 3, 0, /* 0x9d */
1178 {0, 1, 2, 0, /* 0x9e */
1185 {1, 1, 2, 0, /* 0x9f */
1192 {0, 1, 2, 0, /* 0xa0 */
1199 {1, 1, 3, 0, /* 0xa1 */
1206 {0, 1, 3, 0, /* 0xa2 */
1213 {1, 1, 3, 0, /* 0xa3 */
1220 {0, 1, 3, 0, /* 0xa4 */
1227 {1, 1, 4, 0, /* 0xa5 */
1234 {0, 1, 3, 0, /* 0xa6 */
1241 {1, 1, 3, 0, /* 0xa7 */
1248 {0, 1, 3, 0, /* 0xa8 */
1255 {1, 1, 4, 0, /* 0xa9 */
1262 {0, 1, 4, 0, /* 0xaa */
1269 {1, 1, 4, 0, /* 0xab */
1276 {0, 1, 3, 0, /* 0xac */
1283 {1, 1, 4, 0, /* 0xad */
1290 {0, 1, 3, 0, /* 0xae */
1297 {1, 1, 3, 0, /* 0xaf */
1304 {0, 1, 2, 0, /* 0xb0 */
1311 {1, 1, 3, 0, /* 0xb1 */
1318 {0, 1, 3, 0, /* 0xb2 */
1325 {1, 1, 3, 0, /* 0xb3 */
1332 {0, 1, 3, 0, /* 0xb4 */
1339 {1, 1, 4, 0, /* 0xb5 */
1346 {0, 1, 3, 0, /* 0xb6 */
1353 {1, 1, 3, 0, /* 0xb7 */
1360 {0, 1, 2, 0, /* 0xb8 */
1367 {1, 1, 3, 0, /* 0xb9 */
1374 {0, 1, 3, 0, /* 0xba */
1381 {1, 1, 3, 0, /* 0xbb */
1388 {0, 1, 2, 0, /* 0xbc */
1395 {1, 1, 3, 0, /* 0xbd */
1402 {0, 1, 2, 0, /* 0xbe */
1409 {1, 1, 2, 0, /* 0xbf */
1416 {0, 1, 1, 0, /* 0xc0 */
1423 {1, 1, 2, 0, /* 0xc1 */
1430 {0, 1, 2, 0, /* 0xc2 */
1437 {1, 1, 2, 0, /* 0xc3 */
1444 {0, 1, 2, 0, /* 0xc4 */
1451 {1, 1, 3, 0, /* 0xc5 */
1458 {0, 1, 2, 0, /* 0xc6 */
1465 {1, 1, 2, 0, /* 0xc7 */
1472 {0, 1, 2, 0, /* 0xc8 */
1479 {1, 1, 3, 0, /* 0xc9 */
1486 {0, 1, 3, 0, /* 0xca */
1493 {1, 1, 3, 0, /* 0xcb */
1500 {0, 1, 2, 0, /* 0xcc */
1507 {1, 1, 3, 0, /* 0xcd */
1514 {0, 1, 2, 0, /* 0xce */
1521 {1, 1, 2, 0, /* 0xcf */
1528 {0, 1, 2, 0, /* 0xd0 */
1535 {1, 1, 3, 0, /* 0xd1 */
1542 {0, 1, 3, 0, /* 0xd2 */
1549 {1, 1, 3, 0, /* 0xd3 */
1556 {0, 1, 3, 0, /* 0xd4 */
1563 {1, 1, 4, 0, /* 0xd5 */
1570 {0, 1, 3, 0, /* 0xd6 */
1577 {1, 1, 3, 0, /* 0xd7 */
1584 {0, 1, 2, 0, /* 0xd8 */
1591 {1, 1, 3, 0, /* 0xd9 */
1598 {0, 1, 3, 0, /* 0xda */
1605 {1, 1, 3, 0, /* 0xdb */
1612 {0, 1, 2, 0, /* 0xdc */
1619 {1, 1, 3, 0, /* 0xdd */
1626 {0, 1, 2, 0, /* 0xde */
1633 {1, 1, 2, 0, /* 0xdf */
1640 {0, 1, 1, 0, /* 0xe0 */
1647 {1, 1, 2, 0, /* 0xe1 */
1654 {0, 1, 2, 0, /* 0xe2 */
1661 {1, 1, 2, 0, /* 0xe3 */
1668 {0, 1, 2, 0, /* 0xe4 */
1675 {1, 1, 3, 0, /* 0xe5 */
1682 {0, 1, 2, 0, /* 0xe6 */
1689 {1, 1, 2, 0, /* 0xe7 */
1696 {0, 1, 2, 0, /* 0xe8 */
1703 {1, 1, 3, 0, /* 0xe9 */
1710 {0, 1, 3, 0, /* 0xea */
1717 {1, 1, 3, 0, /* 0xeb */
1724 {0, 1, 2, 0, /* 0xec */
1731 {1, 1, 3, 0, /* 0xed */
1738 {0, 1, 2, 0, /* 0xee */
1745 {1, 1, 2, 0, /* 0xef */
1752 {0, 1, 1, 0, /* 0xf0 */
1759 {1, 1, 2, 0, /* 0xf1 */
1766 {0, 1, 2, 0, /* 0xf2 */
1773 {1, 1, 2, 0, /* 0xf3 */
1780 {0, 1, 2, 0, /* 0xf4 */
1787 {1, 1, 3, 0, /* 0xf5 */
1794 {0, 1, 2, 0, /* 0xf6 */
1801 {1, 1, 2, 0, /* 0xf7 */
1808 {0, 1, 1, 0, /* 0xf8 */
1815 {1, 1, 2, 0, /* 0xf9 */
1822 {0, 1, 2, 0, /* 0xfa */
1829 {1, 1, 2, 0, /* 0xfb */
1836 {0, 1, 1, 0, /* 0xfc */
1843 {1, 1, 2, 0, /* 0xfd */
1850 {0, 1, 1, 0, /* 0xfe */
1857 {1, 1, 1, 0, /* 0xff */
1867 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1868 struct sctp_scoping *scope,
1871 if ((scope->loopback_scope == 0) &&
1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1874 * skip loopback if not in scope *
1878 switch (ifa->address.sa.sa_family) {
1881 if (scope->ipv4_addr_legal) {
1882 struct sockaddr_in *sin;
1884 sin = &ifa->address.sin;
1885 if (sin->sin_addr.s_addr == 0) {
1886 /* not in scope , unspecified */
1889 if ((scope->ipv4_local_scope == 0) &&
1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1891 /* private address not in scope */
1901 if (scope->ipv6_addr_legal) {
1902 struct sockaddr_in6 *sin6;
1905 * Must update the flags, bummer, which means any
1906 * IFA locks must now be applied HERE <->
1909 sctp_gather_internal_ifa_flags(ifa);
1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1914 /* ok to use deprecated addresses? */
1915 sin6 = &ifa->address.sin6;
1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1917 /* skip unspecifed addresses */
1920 if ( /* (local_scope == 0) && */
1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1924 if ((scope->site_scope == 0) &&
1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1939 static struct mbuf *
1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
1942 #if defined(INET) || defined(INET6)
1943 struct sctp_paramhdr *paramh;
1948 switch (ifa->address.sa.sa_family) {
1951 plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
1956 plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
1962 #if defined(INET) || defined(INET6)
1963 if (M_TRAILINGSPACE(m) >= plen) {
1964 /* easy side we just drop it on the end */
1965 paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1968 /* Need more space */
1970 while (SCTP_BUF_NEXT(mret) != NULL) {
1971 mret = SCTP_BUF_NEXT(mret);
1973 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1974 if (SCTP_BUF_NEXT(mret) == NULL) {
1975 /* We are hosed, can't add more addresses */
1978 mret = SCTP_BUF_NEXT(mret);
1979 paramh = mtod(mret, struct sctp_paramhdr *);
1981 /* now add the parameter */
1982 switch (ifa->address.sa.sa_family) {
1986 struct sctp_ipv4addr_param *ipv4p;
1987 struct sockaddr_in *sin;
1989 sin = &ifa->address.sin;
1990 ipv4p = (struct sctp_ipv4addr_param *)paramh;
1991 paramh->param_type = htons(SCTP_IPV4_ADDRESS);
1992 paramh->param_length = htons(plen);
1993 ipv4p->addr = sin->sin_addr.s_addr;
1994 SCTP_BUF_LEN(mret) += plen;
2001 struct sctp_ipv6addr_param *ipv6p;
2002 struct sockaddr_in6 *sin6;
2004 sin6 = &ifa->address.sin6;
2005 ipv6p = (struct sctp_ipv6addr_param *)paramh;
2006 paramh->param_type = htons(SCTP_IPV6_ADDRESS);
2007 paramh->param_length = htons(plen);
2008 memcpy(ipv6p->addr, &sin6->sin6_addr,
2009 sizeof(ipv6p->addr));
2010 /* clear embedded scope in the address */
2011 in6_clearscope((struct in6_addr *)ipv6p->addr);
2012 SCTP_BUF_LEN(mret) += plen;
2027 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2028 struct sctp_scoping *scope,
2029 struct mbuf *m_at, int cnt_inits_to,
2030 uint16_t *padding_len, uint16_t *chunk_len)
2032 struct sctp_vrf *vrf = NULL;
2033 int cnt, limit_out = 0, total_count;
2036 vrf_id = inp->def_vrf_id;
2037 SCTP_IPI_ADDR_RLOCK();
2038 vrf = sctp_find_vrf(vrf_id);
2040 SCTP_IPI_ADDR_RUNLOCK();
2043 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2044 struct sctp_ifa *sctp_ifap;
2045 struct sctp_ifn *sctp_ifnp;
2048 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2050 cnt = SCTP_ADDRESS_LIMIT;
2053 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2054 if ((scope->loopback_scope == 0) &&
2055 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2057 * Skip loopback devices if loopback_scope
2062 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2064 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2065 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2066 &sctp_ifap->address.sin.sin_addr) != 0)) {
2071 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2072 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2073 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2077 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2080 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2084 if (cnt > SCTP_ADDRESS_LIMIT) {
2088 if (cnt > SCTP_ADDRESS_LIMIT) {
2095 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2097 if ((scope->loopback_scope == 0) &&
2098 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2100 * Skip loopback devices if
2101 * loopback_scope not set
2105 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2107 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2108 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2109 &sctp_ifap->address.sin.sin_addr) != 0)) {
2114 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2115 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2116 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2120 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2123 if (sctp_is_address_in_scope(sctp_ifap,
2127 if ((chunk_len != NULL) &&
2128 (padding_len != NULL) &&
2129 (*padding_len > 0)) {
2130 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2131 SCTP_BUF_LEN(m_at) += *padding_len;
2132 *chunk_len += *padding_len;
2135 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2146 if (total_count > SCTP_ADDRESS_LIMIT) {
2147 /* No more addresses */
2155 struct sctp_laddr *laddr;
2158 /* First, how many ? */
2159 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2160 if (laddr->ifa == NULL) {
2163 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2165 * Address being deleted by the system, dont
2169 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2171 * Address being deleted on this ep don't
2176 if (sctp_is_address_in_scope(laddr->ifa,
2183 * To get through a NAT we only list addresses if we have
2184 * more than one. That way if you just bind a single address
2185 * we let the source of the init dictate our address.
2189 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2190 if (laddr->ifa == NULL) {
2193 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2196 if (sctp_is_address_in_scope(laddr->ifa,
2200 if ((chunk_len != NULL) &&
2201 (padding_len != NULL) &&
2202 (*padding_len > 0)) {
2203 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2204 SCTP_BUF_LEN(m_at) += *padding_len;
2205 *chunk_len += *padding_len;
2208 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2210 if (cnt >= SCTP_ADDRESS_LIMIT) {
2216 SCTP_IPI_ADDR_RUNLOCK();
2220 static struct sctp_ifa *
2221 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2222 uint8_t dest_is_loop,
2223 uint8_t dest_is_priv,
2226 uint8_t dest_is_global = 0;
2228 /* dest_is_priv is true if destination is a private address */
2229 /* dest_is_loop is true if destination is a loopback addresses */
2232 * Here we determine if its a preferred address. A preferred address
2233 * means it is the same scope or higher scope then the destination.
2234 * L = loopback, P = private, G = global
2235 * -----------------------------------------
2236 * src | dest | result
2237 * ----------------------------------------
2239 * -----------------------------------------
2240 * P | L | yes-v4 no-v6
2241 * -----------------------------------------
2242 * G | L | yes-v4 no-v6
2243 * -----------------------------------------
2245 * -----------------------------------------
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2258 if (ifa->address.sa.sa_family != fam) {
2259 /* forget mis-matched family */
2262 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2265 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2266 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2267 /* Ok the address may be ok */
2269 if (fam == AF_INET6) {
2270 /* ok to use deprecated addresses? no lets not! */
2271 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2272 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2275 if (ifa->src_is_priv && !ifa->src_is_loop) {
2277 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2281 if (ifa->src_is_glob) {
2283 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2290 * Now that we know what is what, implement or table this could in
2291 * theory be done slicker (it used to be), but this is
2292 * straightforward and easier to validate :-)
2294 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2295 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2297 dest_is_loop, dest_is_priv, dest_is_global);
2299 if ((ifa->src_is_loop) && (dest_is_priv)) {
2300 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2303 if ((ifa->src_is_glob) && (dest_is_priv)) {
2304 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2307 if ((ifa->src_is_loop) && (dest_is_global)) {
2308 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2311 if ((ifa->src_is_priv) && (dest_is_global)) {
2312 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2315 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2316 /* its a preferred address */
2320 static struct sctp_ifa *
2321 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2322 uint8_t dest_is_loop,
2323 uint8_t dest_is_priv,
2326 uint8_t dest_is_global = 0;
2329 * Here we determine if its a acceptable address. A acceptable
2330 * address means it is the same scope or higher scope but we can
2331 * allow for NAT which means its ok to have a global dest and a
2334 * L = loopback, P = private, G = global
2335 * -----------------------------------------
2336 * src | dest | result
2337 * -----------------------------------------
2339 * -----------------------------------------
2340 * P | L | yes-v4 no-v6
2341 * -----------------------------------------
2343 * -----------------------------------------
2345 * -----------------------------------------
2347 * -----------------------------------------
2348 * G | P | yes - May not work
2349 * -----------------------------------------
2351 * -----------------------------------------
2352 * P | G | yes - May not work
2353 * -----------------------------------------
2355 * -----------------------------------------
2358 if (ifa->address.sa.sa_family != fam) {
2359 /* forget non matching family */
2360 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2361 ifa->address.sa.sa_family, fam);
2364 /* Ok the address may be ok */
2365 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2366 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2367 dest_is_loop, dest_is_priv);
2368 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2372 if (fam == AF_INET6) {
2373 /* ok to use deprecated addresses? */
2374 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2377 if (ifa->src_is_priv) {
2378 /* Special case, linklocal to loop */
2385 * Now that we know what is what, implement our table. This could in
2386 * theory be done slicker (it used to be), but this is
2387 * straightforward and easier to validate :-)
2389 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2392 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2395 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2398 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2401 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2402 /* its an acceptable address */
2407 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2409 struct sctp_laddr *laddr;
2412 /* There are no restrictions, no TCB :-) */
2415 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2416 if (laddr->ifa == NULL) {
2417 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2421 if (laddr->ifa == ifa) {
2422 /* Yes it is on the list */
2430 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2432 struct sctp_laddr *laddr;
2436 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2437 if (laddr->ifa == NULL) {
2438 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2442 if ((laddr->ifa == ifa) && laddr->action == 0)
2449 static struct sctp_ifa *
2450 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2453 int non_asoc_addr_ok,
2454 uint8_t dest_is_priv,
2455 uint8_t dest_is_loop,
2458 struct sctp_laddr *laddr, *starting_point;
2461 struct sctp_ifn *sctp_ifn;
2462 struct sctp_ifa *sctp_ifa, *sifa;
2463 struct sctp_vrf *vrf;
2466 vrf = sctp_find_vrf(vrf_id);
2470 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2471 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2472 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2474 * first question, is the ifn we will emit on in our list, if so, we
2475 * want such an address. Note that we first looked for a preferred
2479 /* is a preferred one on the interface we route out? */
2480 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2482 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2483 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2484 &sctp_ifa->address.sin.sin_addr) != 0)) {
2489 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2490 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2491 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2495 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2496 (non_asoc_addr_ok == 0))
2498 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2503 if (sctp_is_addr_in_ep(inp, sifa)) {
2504 atomic_add_int(&sifa->refcount, 1);
2510 * ok, now we now need to find one on the list of the addresses. We
2511 * can't get one on the emitting interface so let's find first a
2512 * preferred one. If not that an acceptable one otherwise... we
2515 starting_point = inp->next_addr_touse;
2517 if (inp->next_addr_touse == NULL) {
2518 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2521 for (laddr = inp->next_addr_touse; laddr;
2522 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2523 if (laddr->ifa == NULL) {
2524 /* address has been removed */
2527 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2528 /* address is being deleted */
2531 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2535 atomic_add_int(&sifa->refcount, 1);
2538 if (resettotop == 0) {
2539 inp->next_addr_touse = NULL;
2543 inp->next_addr_touse = starting_point;
2546 if (inp->next_addr_touse == NULL) {
2547 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2551 /* ok, what about an acceptable address in the inp */
2552 for (laddr = inp->next_addr_touse; laddr;
2553 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2554 if (laddr->ifa == NULL) {
2555 /* address has been removed */
2558 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2559 /* address is being deleted */
2562 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2566 atomic_add_int(&sifa->refcount, 1);
2569 if (resettotop == 0) {
2570 inp->next_addr_touse = NULL;
2571 goto once_again_too;
2575 * no address bound can be a source for the destination we are in
2581 static struct sctp_ifa *
2582 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2583 struct sctp_tcb *stcb,
2586 uint8_t dest_is_priv,
2587 uint8_t dest_is_loop,
2588 int non_asoc_addr_ok,
2591 struct sctp_laddr *laddr, *starting_point;
2593 struct sctp_ifn *sctp_ifn;
2594 struct sctp_ifa *sctp_ifa, *sifa;
2595 uint8_t start_at_beginning = 0;
2596 struct sctp_vrf *vrf;
2600 * first question, is the ifn we will emit on in our list, if so, we
2603 vrf = sctp_find_vrf(vrf_id);
2607 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2608 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2609 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2612 * first question, is the ifn we will emit on in our list? If so,
2613 * we want that one. First we look for a preferred. Second, we go
2614 * for an acceptable.
2617 /* first try for a preferred address on the ep */
2618 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2620 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2621 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2622 &sctp_ifa->address.sin.sin_addr) != 0)) {
2627 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2628 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2629 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2633 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2635 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2636 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2639 if (((non_asoc_addr_ok == 0) &&
2640 (sctp_is_addr_restricted(stcb, sifa))) ||
2641 (non_asoc_addr_ok &&
2642 (sctp_is_addr_restricted(stcb, sifa)) &&
2643 (!sctp_is_addr_pending(stcb, sifa)))) {
2644 /* on the no-no list */
2647 atomic_add_int(&sifa->refcount, 1);
2651 /* next try for an acceptable address on the ep */
2652 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2654 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2655 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2656 &sctp_ifa->address.sin.sin_addr) != 0)) {
2661 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2662 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2663 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2667 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2669 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2670 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2673 if (((non_asoc_addr_ok == 0) &&
2674 (sctp_is_addr_restricted(stcb, sifa))) ||
2675 (non_asoc_addr_ok &&
2676 (sctp_is_addr_restricted(stcb, sifa)) &&
2677 (!sctp_is_addr_pending(stcb, sifa)))) {
2678 /* on the no-no list */
2681 atomic_add_int(&sifa->refcount, 1);
2687 * if we can't find one like that then we must look at all addresses
2688 * bound to pick one at first preferable then secondly acceptable.
2690 starting_point = stcb->asoc.last_used_address;
2692 if (stcb->asoc.last_used_address == NULL) {
2693 start_at_beginning = 1;
2694 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2696 /* search beginning with the last used address */
2697 for (laddr = stcb->asoc.last_used_address; laddr;
2698 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2699 if (laddr->ifa == NULL) {
2700 /* address has been removed */
2703 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2704 /* address is being deleted */
2707 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2710 if (((non_asoc_addr_ok == 0) &&
2711 (sctp_is_addr_restricted(stcb, sifa))) ||
2712 (non_asoc_addr_ok &&
2713 (sctp_is_addr_restricted(stcb, sifa)) &&
2714 (!sctp_is_addr_pending(stcb, sifa)))) {
2715 /* on the no-no list */
2718 stcb->asoc.last_used_address = laddr;
2719 atomic_add_int(&sifa->refcount, 1);
2722 if (start_at_beginning == 0) {
2723 stcb->asoc.last_used_address = NULL;
2724 goto sctp_from_the_top;
2726 /* now try for any higher scope than the destination */
2727 stcb->asoc.last_used_address = starting_point;
2728 start_at_beginning = 0;
2730 if (stcb->asoc.last_used_address == NULL) {
2731 start_at_beginning = 1;
2732 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2734 /* search beginning with the last used address */
2735 for (laddr = stcb->asoc.last_used_address; laddr;
2736 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2737 if (laddr->ifa == NULL) {
2738 /* address has been removed */
2741 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2742 /* address is being deleted */
2745 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2749 if (((non_asoc_addr_ok == 0) &&
2750 (sctp_is_addr_restricted(stcb, sifa))) ||
2751 (non_asoc_addr_ok &&
2752 (sctp_is_addr_restricted(stcb, sifa)) &&
2753 (!sctp_is_addr_pending(stcb, sifa)))) {
2754 /* on the no-no list */
2757 stcb->asoc.last_used_address = laddr;
2758 atomic_add_int(&sifa->refcount, 1);
2761 if (start_at_beginning == 0) {
2762 stcb->asoc.last_used_address = NULL;
2763 goto sctp_from_the_top2;
2768 static struct sctp_ifa *
2769 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2770 struct sctp_inpcb *inp,
2771 struct sctp_tcb *stcb,
2772 int non_asoc_addr_ok,
2773 uint8_t dest_is_loop,
2774 uint8_t dest_is_priv,
2779 struct sctp_ifa *ifa, *sifa;
2780 int num_eligible_addr = 0;
2782 struct sockaddr_in6 sin6, lsa6;
2784 if (fam == AF_INET6) {
2785 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2786 (void)sa6_recoverscope(&sin6);
2789 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2791 if ((ifa->address.sa.sa_family == AF_INET) &&
2792 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2793 &ifa->address.sin.sin_addr) != 0)) {
2798 if ((ifa->address.sa.sa_family == AF_INET6) &&
2799 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin6.sin6_addr) != 0)) {
2804 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2805 (non_asoc_addr_ok == 0))
2807 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2812 if (fam == AF_INET6 &&
2814 sifa->src_is_loop && sifa->src_is_priv) {
2816 * don't allow fe80::1 to be a src on loop ::1, we
2817 * don't list it to the peer so we will get an
2822 if (fam == AF_INET6 &&
2823 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2824 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2826 * link-local <-> link-local must belong to the same
2829 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2830 (void)sa6_recoverscope(&lsa6);
2831 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2838 * Check if the IPv6 address matches to next-hop. In the
2839 * mobile case, old IPv6 address may be not deleted from the
2840 * interface. Then, the interface has previous and new
2841 * addresses. We should use one corresponding to the
2842 * next-hop. (by micchie)
2845 if (stcb && fam == AF_INET6 &&
2846 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2847 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2854 /* Avoid topologically incorrect IPv4 address */
2855 if (stcb && fam == AF_INET &&
2856 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2857 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2863 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2866 if (((non_asoc_addr_ok == 0) &&
2867 (sctp_is_addr_restricted(stcb, sifa))) ||
2868 (non_asoc_addr_ok &&
2869 (sctp_is_addr_restricted(stcb, sifa)) &&
2870 (!sctp_is_addr_pending(stcb, sifa)))) {
2872 * It is restricted for some reason..
2873 * probably not yet added.
2878 if (num_eligible_addr >= addr_wanted) {
2881 num_eligible_addr++;
2887 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2888 struct sctp_inpcb *inp,
2889 struct sctp_tcb *stcb,
2890 int non_asoc_addr_ok,
2891 uint8_t dest_is_loop,
2892 uint8_t dest_is_priv,
2895 struct sctp_ifa *ifa, *sifa;
2896 int num_eligible_addr = 0;
2898 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2900 if ((ifa->address.sa.sa_family == AF_INET) &&
2901 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2902 &ifa->address.sin.sin_addr) != 0)) {
2907 if ((ifa->address.sa.sa_family == AF_INET6) &&
2909 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin6.sin6_addr) != 0)) {
2914 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2915 (non_asoc_addr_ok == 0)) {
2918 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2924 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2927 if (((non_asoc_addr_ok == 0) &&
2928 (sctp_is_addr_restricted(stcb, sifa))) ||
2929 (non_asoc_addr_ok &&
2930 (sctp_is_addr_restricted(stcb, sifa)) &&
2931 (!sctp_is_addr_pending(stcb, sifa)))) {
2933 * It is restricted for some reason..
2934 * probably not yet added.
2939 num_eligible_addr++;
2941 return (num_eligible_addr);
2944 static struct sctp_ifa *
2945 sctp_choose_boundall(struct sctp_inpcb *inp,
2946 struct sctp_tcb *stcb,
2947 struct sctp_nets *net,
2950 uint8_t dest_is_priv,
2951 uint8_t dest_is_loop,
2952 int non_asoc_addr_ok,
2955 int cur_addr_num = 0, num_preferred = 0;
2957 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2958 struct sctp_ifa *sctp_ifa, *sifa;
2960 struct sctp_vrf *vrf;
2966 * For boundall we can use any address in the association.
2967 * If non_asoc_addr_ok is set we can use any address (at least in
2968 * theory). So we look for preferred addresses first. If we find one,
2969 * we use it. Otherwise we next try to get an address on the
2970 * interface, which we should be able to do (unless non_asoc_addr_ok
2971 * is false and we are routed out that way). In these cases where we
2972 * can't use the address of the interface we go through all the
2973 * ifn's looking for an address we can use and fill that in. Punting
2974 * means we send back address 0, which will probably cause problems
2975 * actually since then IP will fill in the address of the route ifn,
2976 * which means we probably already rejected it.. i.e. here comes an
2979 vrf = sctp_find_vrf(vrf_id);
2983 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2984 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2985 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2986 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2987 if (sctp_ifn == NULL) {
2988 /* ?? We don't have this guy ?? */
2989 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2990 goto bound_all_plan_b;
2992 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2993 ifn_index, sctp_ifn->ifn_name);
2996 cur_addr_num = net->indx_of_eligible_next_to_use;
2998 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3003 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3004 num_preferred, sctp_ifn->ifn_name);
3005 if (num_preferred == 0) {
3007 * no eligible addresses, we must use some other interface
3008 * address if we can find one.
3010 goto bound_all_plan_b;
3013 * Ok we have num_eligible_addr set with how many we can use, this
3014 * may vary from call to call due to addresses being deprecated
3017 if (cur_addr_num >= num_preferred) {
3021 * select the nth address from the list (where cur_addr_num is the
3022 * nth) and 0 is the first one, 1 is the second one etc...
3024 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3026 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3027 dest_is_priv, cur_addr_num, fam, ro);
3029 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3031 atomic_add_int(&sctp_ifa->refcount, 1);
3033 /* save off where the next one we will want */
3034 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3039 * plan_b: Look at all interfaces and find a preferred address. If
3040 * no preferred fall through to plan_c.
3043 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3044 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3045 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3046 sctp_ifn->ifn_name);
3047 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3048 /* wrong base scope */
3049 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3052 if ((sctp_ifn == looked_at) && looked_at) {
3053 /* already looked at this guy */
3054 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3057 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3058 dest_is_loop, dest_is_priv, fam);
3059 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3060 "Found ifn:%p %d preferred source addresses\n",
3061 ifn, num_preferred);
3062 if (num_preferred == 0) {
3063 /* None on this interface. */
3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3067 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3068 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3069 num_preferred, (void *)sctp_ifn, cur_addr_num);
3072 * Ok we have num_eligible_addr set with how many we can
3073 * use, this may vary from call to call due to addresses
3074 * being deprecated etc..
3076 if (cur_addr_num >= num_preferred) {
3079 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3080 dest_is_priv, cur_addr_num, fam, ro);
3084 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3085 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3087 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3088 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3089 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3090 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3092 atomic_add_int(&sifa->refcount, 1);
3096 again_with_private_addresses_allowed:
3098 /* plan_c: do we have an acceptable address on the emit interface */
3100 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3101 if (emit_ifn == NULL) {
3102 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3105 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3106 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3108 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3109 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3110 &sctp_ifa->address.sin.sin_addr) != 0)) {
3111 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3116 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3117 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3118 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3119 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3123 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3124 (non_asoc_addr_ok == 0)) {
3125 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3128 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3131 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3135 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3136 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3140 if (((non_asoc_addr_ok == 0) &&
3141 (sctp_is_addr_restricted(stcb, sifa))) ||
3142 (non_asoc_addr_ok &&
3143 (sctp_is_addr_restricted(stcb, sifa)) &&
3144 (!sctp_is_addr_pending(stcb, sifa)))) {
3146 * It is restricted for some reason..
3147 * probably not yet added.
3149 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3154 atomic_add_int(&sifa->refcount, 1);
3159 * plan_d: We are in trouble. No preferred address on the emit
3160 * interface. And not even a preferred address on all interfaces. Go
3161 * out and see if we can find an acceptable address somewhere
3162 * amongst all interfaces.
3164 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3165 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3166 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3167 /* wrong base scope */
3170 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3172 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3173 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3174 &sctp_ifa->address.sin.sin_addr) != 0)) {
3179 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3180 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3181 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3185 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3186 (non_asoc_addr_ok == 0))
3188 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3194 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3198 if (((non_asoc_addr_ok == 0) &&
3199 (sctp_is_addr_restricted(stcb, sifa))) ||
3200 (non_asoc_addr_ok &&
3201 (sctp_is_addr_restricted(stcb, sifa)) &&
3202 (!sctp_is_addr_pending(stcb, sifa)))) {
3204 * It is restricted for some
3205 * reason.. probably not yet added.
3216 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3217 stcb->asoc.scope.ipv4_local_scope = 1;
3219 goto again_with_private_addresses_allowed;
3220 } else if (retried == 1) {
3221 stcb->asoc.scope.ipv4_local_scope = 0;
3229 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3230 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3231 /* wrong base scope */
3234 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3235 struct sctp_ifa *tmp_sifa;
3238 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3239 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3240 &sctp_ifa->address.sin.sin_addr) != 0)) {
3245 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3246 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3247 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3251 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3252 (non_asoc_addr_ok == 0))
3254 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3257 if (tmp_sifa == NULL) {
3260 if (tmp_sifa == sifa) {
3264 if (sctp_is_address_in_scope(tmp_sifa,
3265 &stcb->asoc.scope, 0) == 0) {
3268 if (((non_asoc_addr_ok == 0) &&
3269 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3270 (non_asoc_addr_ok &&
3271 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3272 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3282 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3283 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3284 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3289 atomic_add_int(&sifa->refcount, 1);
3295 /* tcb may be NULL */
3297 sctp_source_address_selection(struct sctp_inpcb *inp,
3298 struct sctp_tcb *stcb,
3300 struct sctp_nets *net,
3301 int non_asoc_addr_ok, uint32_t vrf_id)
3303 struct sctp_ifa *answer;
3304 uint8_t dest_is_priv, dest_is_loop;
3307 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3310 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3315 * - Find the route if needed, cache if I can.
3316 * - Look at interface address in route, Is it in the bound list. If so we
3317 * have the best source.
3318 * - If not we must rotate amongst the addresses.
3322 * Do we need to pay attention to scope. We can have a private address
3323 * or a global address we are sourcing or sending to. So if we draw
3325 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3327 * ------------------------------------------
3328 * source * dest * result
3329 * -----------------------------------------
3330 * <a> Private * Global * NAT
3331 * -----------------------------------------
3332 * <b> Private * Private * No problem
3333 * -----------------------------------------
3334 * <c> Global * Private * Huh, How will this work?
3335 * -----------------------------------------
3336 * <d> Global * Global * No Problem
3337 *------------------------------------------
3338 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3340 *------------------------------------------
3341 * source * dest * result
3342 * -----------------------------------------
3343 * <a> Linklocal * Global *
3344 * -----------------------------------------
3345 * <b> Linklocal * Linklocal * No problem
3346 * -----------------------------------------
3347 * <c> Global * Linklocal * Huh, How will this work?
3348 * -----------------------------------------
3349 * <d> Global * Global * No Problem
3350 *------------------------------------------
3351 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3353 * And then we add to that what happens if there are multiple addresses
3354 * assigned to an interface. Remember the ifa on a ifn is a linked
3355 * list of addresses. So one interface can have more than one IP
3356 * address. What happens if we have both a private and a global
3357 * address? Do we then use context of destination to sort out which
3358 * one is best? And what about NAT's sending P->G may get you a NAT
3359 * translation, or should you select the G thats on the interface in
3364 * - count the number of addresses on the interface.
3365 * - if it is one, no problem except case <c>.
3366 * For <a> we will assume a NAT out there.
3367 * - if there are more than one, then we need to worry about scope P
3368 * or G. We should prefer G -> G and P -> P if possible.
3369 * Then as a secondary fall back to mixed types G->P being a last
3371 * - The above all works for bound all, but bound specific we need to
3372 * use the same concept but instead only consider the bound
3373 * addresses. If the bound set is NOT assigned to the interface then
3374 * we must use rotation amongst the bound addresses..
3376 if (ro->ro_nh == NULL) {
3378 * Need a route to cache.
3380 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3382 if (ro->ro_nh == NULL) {
3385 fam = ro->ro_dst.sa_family;
3386 dest_is_priv = dest_is_loop = 0;
3387 /* Setup our scopes for the destination */
3391 /* Scope based on outbound address */
3392 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3395 /* mark it as local */
3396 net->addr_is_local = 1;
3398 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3405 /* Scope based on outbound address */
3406 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3407 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3409 * If the address is a loopback address, which
3410 * consists of "::1" OR "fe80::1%lo0", we are
3411 * loopback scope. But we don't use dest_is_priv
3412 * (link local addresses).
3416 /* mark it as local */
3417 net->addr_is_local = 1;
3419 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3425 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3426 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3427 SCTP_IPI_ADDR_RLOCK();
3428 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3432 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3433 dest_is_priv, dest_is_loop,
3434 non_asoc_addr_ok, fam);
3435 SCTP_IPI_ADDR_RUNLOCK();
3442 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3443 vrf_id, dest_is_priv,
3445 non_asoc_addr_ok, fam);
3447 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3452 SCTP_IPI_ADDR_RUNLOCK();
3457 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3460 struct sctp_sndinfo sndinfo;
3461 struct sctp_prinfo prinfo;
3462 struct sctp_authinfo authinfo;
3463 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3467 * Independent of how many mbufs, find the c_type inside the control
3468 * structure and copy out the data.
3471 tot_len = SCTP_BUF_LEN(control);
3472 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3473 rem_len = tot_len - off;
3474 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3475 /* There is not enough room for one more. */
3478 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3479 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3480 /* We dont't have a complete CMSG header. */
3483 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3484 /* We don't have the complete CMSG. */
3487 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3488 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3489 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3490 ((c_type == cmh.cmsg_type) ||
3491 ((c_type == SCTP_SNDRCV) &&
3492 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3493 (cmh.cmsg_type == SCTP_PRINFO) ||
3494 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3495 if (c_type == cmh.cmsg_type) {
3496 if (cpsize > INT_MAX) {
3499 if (cmsg_data_len < (int)cpsize) {
3502 /* It is exactly what we want. Copy it out. */
3503 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3506 struct sctp_sndrcvinfo *sndrcvinfo;
3508 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3510 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3513 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3515 switch (cmh.cmsg_type) {
3517 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3520 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3521 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3522 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3523 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3524 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3525 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3528 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3531 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3532 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3533 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3535 sndrcvinfo->sinfo_timetolive = 0;
3537 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3540 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3543 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3544 sndrcvinfo->sinfo_keynumber_valid = 1;
3545 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3558 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3561 struct sctp_initmsg initmsg;
3563 struct sockaddr_in sin;
3566 struct sockaddr_in6 sin6;
3568 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3570 tot_len = SCTP_BUF_LEN(control);
3571 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3572 rem_len = tot_len - off;
3573 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3574 /* There is not enough room for one more. */
3578 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3579 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3580 /* We dont't have a complete CMSG header. */
3584 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3585 /* We don't have the complete CMSG. */
3589 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3590 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3591 if (cmh.cmsg_level == IPPROTO_SCTP) {
3592 switch (cmh.cmsg_type) {
3594 if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
3598 m_copydata(control, cmsg_data_off, sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3599 if (initmsg.sinit_max_attempts)
3600 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3601 if (initmsg.sinit_num_ostreams)
3602 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3603 if (initmsg.sinit_max_instreams)
3604 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3605 if (initmsg.sinit_max_init_timeo)
3606 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3607 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3608 struct sctp_stream_out *tmp_str;
3610 #if defined(SCTP_DETAILED_STR_STATS)
3614 /* Default is NOT correct */
3615 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3616 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3617 SCTP_TCB_UNLOCK(stcb);
3618 SCTP_MALLOC(tmp_str,
3619 struct sctp_stream_out *,
3620 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3622 SCTP_TCB_LOCK(stcb);
3623 if (tmp_str != NULL) {
3624 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3625 stcb->asoc.strmout = tmp_str;
3626 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3628 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3630 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3631 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3632 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3633 stcb->asoc.strmout[i].chunks_on_queues = 0;
3634 #if defined(SCTP_DETAILED_STR_STATS)
3635 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3636 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3637 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3640 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3641 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3643 stcb->asoc.strmout[i].next_mid_ordered = 0;
3644 stcb->asoc.strmout[i].next_mid_unordered = 0;
3645 stcb->asoc.strmout[i].sid = i;
3646 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3647 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3652 case SCTP_DSTADDRV4:
3653 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3657 memset(&sin, 0, sizeof(struct sockaddr_in));
3658 sin.sin_family = AF_INET;
3659 sin.sin_len = sizeof(struct sockaddr_in);
3660 sin.sin_port = stcb->rport;
3661 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3662 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3663 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3664 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3668 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3669 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3676 case SCTP_DSTADDRV6:
3677 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3681 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3682 sin6.sin6_family = AF_INET6;
3683 sin6.sin6_len = sizeof(struct sockaddr_in6);
3684 sin6.sin6_port = stcb->rport;
3685 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3686 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3687 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3692 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3693 in6_sin6_2_sin(&sin, &sin6);
3694 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3695 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3696 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3700 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3701 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3707 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3708 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3722 #if defined(INET) || defined(INET6)
3723 static struct sctp_tcb *
3724 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3726 struct mbuf *control,
3727 struct sctp_nets **net_p,
3731 struct sctp_tcb *stcb;
3732 struct sockaddr *addr;
3734 struct sockaddr_in sin;
3737 struct sockaddr_in6 sin6;
3739 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3741 tot_len = SCTP_BUF_LEN(control);
3742 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3743 rem_len = tot_len - off;
3744 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3745 /* There is not enough room for one more. */
3749 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3750 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3751 /* We dont't have a complete CMSG header. */
3755 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3756 /* We don't have the complete CMSG. */
3760 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3761 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3762 if (cmh.cmsg_level == IPPROTO_SCTP) {
3763 switch (cmh.cmsg_type) {
3765 case SCTP_DSTADDRV4:
3766 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3770 memset(&sin, 0, sizeof(struct sockaddr_in));
3771 sin.sin_family = AF_INET;
3772 sin.sin_len = sizeof(struct sockaddr_in);
3773 sin.sin_port = port;
3774 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3775 addr = (struct sockaddr *)&sin;
3779 case SCTP_DSTADDRV6:
3780 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3784 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3785 sin6.sin6_family = AF_INET6;
3786 sin6.sin6_len = sizeof(struct sockaddr_in6);
3787 sin6.sin6_port = port;
3788 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3790 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3791 in6_sin6_2_sin(&sin, &sin6);
3792 addr = (struct sockaddr *)&sin;
3795 addr = (struct sockaddr *)&sin6;
3803 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3814 static struct mbuf *
3815 sctp_add_cookie(struct mbuf *init, int init_offset,
3816 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3818 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3819 struct sctp_state_cookie *stc;
3820 struct sctp_paramhdr *ph;
3823 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3824 sizeof(struct sctp_paramhdr)), 0,
3825 M_NOWAIT, 1, MT_DATA);
3829 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3830 if (copy_init == NULL) {
3834 #ifdef SCTP_MBUF_LOGGING
3835 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3836 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3839 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3841 if (copy_initack == NULL) {
3843 sctp_m_freem(copy_init);
3846 #ifdef SCTP_MBUF_LOGGING
3847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3848 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3851 /* easy side we just drop it on the end */
3852 ph = mtod(mret, struct sctp_paramhdr *);
3853 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3854 sizeof(struct sctp_paramhdr);
3855 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3856 sizeof(struct sctp_paramhdr));
3857 ph->param_type = htons(SCTP_STATE_COOKIE);
3858 ph->param_length = 0; /* fill in at the end */
3859 /* Fill in the stc cookie data */
3860 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3862 /* tack the INIT and then the INIT-ACK onto the chain */
3864 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3865 cookie_sz += SCTP_BUF_LEN(m_at);
3866 if (SCTP_BUF_NEXT(m_at) == NULL) {
3867 SCTP_BUF_NEXT(m_at) = copy_init;
3871 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3872 cookie_sz += SCTP_BUF_LEN(m_at);
3873 if (SCTP_BUF_NEXT(m_at) == NULL) {
3874 SCTP_BUF_NEXT(m_at) = copy_initack;
3878 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3879 cookie_sz += SCTP_BUF_LEN(m_at);
3880 if (SCTP_BUF_NEXT(m_at) == NULL) {
3884 sig = sctp_get_mbuf_for_msg(SCTP_SIGNATURE_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3886 /* no space, so free the entire chain */
3890 SCTP_BUF_NEXT(m_at) = sig;
3891 SCTP_BUF_LEN(sig) = SCTP_SIGNATURE_SIZE;
3892 cookie_sz += SCTP_SIGNATURE_SIZE;
3893 ph->param_length = htons(cookie_sz);
3894 *signature = (uint8_t *)mtod(sig, caddr_t);
3895 memset(*signature, 0, SCTP_SIGNATURE_SIZE);
3900 sctp_get_ect(struct sctp_tcb *stcb)
3902 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3903 return (SCTP_ECT0_BIT);
3909 #if defined(INET) || defined(INET6)
3911 sctp_handle_no_route(struct sctp_tcb *stcb,
3912 struct sctp_nets *net,
3915 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3918 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3919 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3920 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3921 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3922 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3923 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3927 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3928 net->dest_state &= ~SCTP_ADDR_PF;
3932 if (net == stcb->asoc.primary_destination) {
3933 /* need a new primary */
3934 struct sctp_nets *alt;
3936 alt = sctp_find_alternate_net(stcb, net, 0);
3938 if (stcb->asoc.alternate) {
3939 sctp_free_remote_addr(stcb->asoc.alternate);
3941 stcb->asoc.alternate = alt;
3942 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3943 if (net->ro._s_addr) {
3944 sctp_free_ifa(net->ro._s_addr);
3945 net->ro._s_addr = NULL;
3947 net->src_addr_selected = 0;
3956 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3957 struct sctp_tcb *stcb, /* may be NULL */
3958 struct sctp_nets *net,
3959 struct sockaddr *to,
3961 uint32_t auth_offset,
3962 struct sctp_auth_chunk *auth,
3963 uint16_t auth_keyid,
3964 int nofragment_flag,
3971 union sctp_sockstore *over_addr,
3972 uint8_t mflowtype, uint32_t mflowid,
3975 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3977 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3978 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3979 * - fill in the HMAC digest of any AUTH chunk in the packet.
3980 * - calculate and fill in the SCTP checksum.
3981 * - prepend an IP address header.
3982 * - if boundall use INADDR_ANY.
3983 * - if boundspecific do source address selection.
3984 * - set fragmentation option for ipV4.
3985 * - On return from IP output, check/adjust mtu size of output
3986 * interface and smallest_mtu size as well.
3988 /* Will need ifdefs around this */
3990 struct sctphdr *sctphdr;
3993 #if defined(INET) || defined(INET6)
3996 #if defined(INET) || defined(INET6)
3998 sctp_route_t *ro = NULL;
3999 struct udphdr *udp = NULL;
4003 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4004 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4008 #if defined(INET) || defined(INET6)
4010 vrf_id = stcb->asoc.vrf_id;
4012 vrf_id = inp->def_vrf_id;
4015 /* fill in the HMAC digest for any AUTH chunk in the packet */
4016 if ((auth != NULL) && (stcb != NULL)) {
4017 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4021 tos_value = net->dscp;
4023 tos_value = stcb->asoc.default_dscp;
4025 tos_value = inp->sctp_ep.default_dscp;
4028 switch (to->sa_family) {
4032 struct ip *ip = NULL;
4033 sctp_route_t iproute;
4036 len = SCTP_MIN_V4_OVERHEAD;
4038 len += sizeof(struct udphdr);
4040 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4043 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4046 SCTP_ALIGN_TO_END(newm, len);
4047 SCTP_BUF_LEN(newm) = len;
4048 SCTP_BUF_NEXT(newm) = m;
4051 m->m_pkthdr.flowid = net->flowid;
4052 M_HASHTYPE_SET(m, net->flowtype);
4054 m->m_pkthdr.flowid = mflowid;
4055 M_HASHTYPE_SET(m, mflowtype);
4057 packet_length = sctp_calculate_len(m);
4058 ip = mtod(m, struct ip *);
4059 ip->ip_v = IPVERSION;
4060 ip->ip_hl = (sizeof(struct ip) >> 2);
4061 if (tos_value == 0) {
4063 * This means especially, that it is not set
4064 * at the SCTP layer. So use the value from
4067 tos_value = inp->ip_inp.inp.inp_ip_tos;
4071 tos_value |= sctp_get_ect(stcb);
4073 if ((nofragment_flag) && (port == 0)) {
4074 ip->ip_off = htons(IP_DF);
4076 ip->ip_off = htons(0);
4078 /* FreeBSD has a function for ip_id's */
4081 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4082 ip->ip_len = htons(packet_length);
4083 ip->ip_tos = tos_value;
4085 ip->ip_p = IPPROTO_UDP;
4087 ip->ip_p = IPPROTO_SCTP;
4092 memset(&iproute, 0, sizeof(iproute));
4093 memcpy(&ro->ro_dst, to, to->sa_len);
4095 ro = (sctp_route_t *)&net->ro;
4097 /* Now the address selection part */
4098 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4100 /* call the routine to select the src address */
4101 if (net && out_of_asoc_ok == 0) {
4102 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4103 sctp_free_ifa(net->ro._s_addr);
4104 net->ro._s_addr = NULL;
4105 net->src_addr_selected = 0;
4108 if (net->src_addr_selected == 0) {
4109 /* Cache the source address */
4110 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4113 net->src_addr_selected = 1;
4115 if (net->ro._s_addr == NULL) {
4116 /* No route to host */
4117 net->src_addr_selected = 0;
4118 sctp_handle_no_route(stcb, net, so_locked);
4119 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4121 return (EHOSTUNREACH);
4123 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4125 if (over_addr == NULL) {
4126 struct sctp_ifa *_lsrc;
4128 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4132 if (_lsrc == NULL) {
4133 sctp_handle_no_route(stcb, net, so_locked);
4134 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4136 return (EHOSTUNREACH);
4138 ip->ip_src = _lsrc->address.sin.sin_addr;
4139 sctp_free_ifa(_lsrc);
4141 ip->ip_src = over_addr->sin.sin_addr;
4142 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4146 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4147 sctp_handle_no_route(stcb, net, so_locked);
4148 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4150 return (EHOSTUNREACH);
4152 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4153 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4154 udp->uh_dport = port;
4155 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4157 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4161 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4163 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4166 sctphdr->src_port = src_port;
4167 sctphdr->dest_port = dest_port;
4168 sctphdr->v_tag = v_tag;
4169 sctphdr->checksum = 0;
4172 * If source address selection fails and we find no
4173 * route then the ip_output should fail as well with
4174 * a NO_ROUTE_TO_HOST type error. We probably should
4175 * catch that somewhere and abort the association
4176 * right away (assuming this is an INIT being sent).
4178 if (ro->ro_nh == NULL) {
4180 * src addr selection failed to find a route
4181 * (or valid source addr), so we can't get
4182 * there from here (yet)!
4184 sctp_handle_no_route(stcb, net, so_locked);
4185 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4187 return (EHOSTUNREACH);
4189 if (ro != &iproute) {
4190 memcpy(&iproute, ro, sizeof(*ro));
4192 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4193 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4194 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4195 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4196 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4199 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4200 /* failed to prepend data, give up */
4201 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4205 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4207 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4208 SCTP_STAT_INCR(sctps_sendswcrc);
4210 SCTP_ENABLE_UDP_CSUM(o_pak);
4213 m->m_pkthdr.csum_flags = CSUM_SCTP;
4214 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4215 SCTP_STAT_INCR(sctps_sendhwcrc);
4217 #ifdef SCTP_PACKET_LOGGING
4218 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4219 sctp_packet_log(o_pak);
4221 /* send it out. table id is taken from stcb */
4222 SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
4223 SCTP_IP_OUTPUT(ret, o_pak, ro, inp, vrf_id);
4225 UDPSTAT_INC(udps_opackets);
4227 SCTP_STAT_INCR(sctps_sendpackets);
4228 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4230 SCTP_STAT_INCR(sctps_senderrors);
4232 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4234 /* free tempy routes */
4237 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4238 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4241 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4244 mtu -= sizeof(struct udphdr);
4246 if (mtu < net->mtu) {
4247 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4248 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4253 } else if (ro->ro_nh == NULL) {
4254 /* route was freed */
4255 if (net->ro._s_addr &&
4256 net->src_addr_selected) {
4257 sctp_free_ifa(net->ro._s_addr);
4258 net->ro._s_addr = NULL;
4260 net->src_addr_selected = 0;
4269 uint32_t flowlabel, flowinfo;
4270 struct ip6_hdr *ip6h;
4271 struct route_in6 ip6route;
4273 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4275 struct sockaddr_in6 lsa6_storage;
4277 u_short prev_port = 0;
4281 flowlabel = net->flowlabel;
4283 flowlabel = stcb->asoc.default_flowlabel;
4285 flowlabel = inp->sctp_ep.default_flowlabel;
4287 if (flowlabel == 0) {
4289 * This means especially, that it is not set
4290 * at the SCTP layer. So use the value from
4293 flowlabel = ntohl(((struct inpcb *)inp)->inp_flow);
4295 flowlabel &= 0x000fffff;
4296 len = SCTP_MIN_OVERHEAD;
4298 len += sizeof(struct udphdr);
4300 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4303 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4306 SCTP_ALIGN_TO_END(newm, len);
4307 SCTP_BUF_LEN(newm) = len;
4308 SCTP_BUF_NEXT(newm) = m;
4311 m->m_pkthdr.flowid = net->flowid;
4312 M_HASHTYPE_SET(m, net->flowtype);
4314 m->m_pkthdr.flowid = mflowid;
4315 M_HASHTYPE_SET(m, mflowtype);
4317 packet_length = sctp_calculate_len(m);
4319 ip6h = mtod(m, struct ip6_hdr *);
4320 /* protect *sin6 from overwrite */
4321 sin6 = (struct sockaddr_in6 *)to;
4325 /* KAME hack: embed scopeid */
4326 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4327 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4332 memset(&ip6route, 0, sizeof(ip6route));
4333 ro = (sctp_route_t *)&ip6route;
4334 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4336 ro = (sctp_route_t *)&net->ro;
4339 * We assume here that inp_flow is in host byte
4340 * order within the TCB!
4342 if (tos_value == 0) {
4344 * This means especially, that it is not set
4345 * at the SCTP layer. So use the value from
4348 tos_value = (ntohl(((struct inpcb *)inp)->inp_flow) >> 20) & 0xff;
4352 tos_value |= sctp_get_ect(stcb);
4356 flowinfo |= tos_value;
4358 flowinfo |= flowlabel;
4359 ip6h->ip6_flow = htonl(flowinfo);
4361 ip6h->ip6_nxt = IPPROTO_UDP;
4363 ip6h->ip6_nxt = IPPROTO_SCTP;
4365 ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4366 ip6h->ip6_dst = sin6->sin6_addr;
4369 * Add SRC address selection here: we can only reuse
4370 * to a limited degree the kame src-addr-sel, since
4371 * we can try their selection but it may not be
4374 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4375 lsa6_tmp.sin6_family = AF_INET6;
4376 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4378 if (net && out_of_asoc_ok == 0) {
4379 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4380 sctp_free_ifa(net->ro._s_addr);
4381 net->ro._s_addr = NULL;
4382 net->src_addr_selected = 0;
4385 if (net->src_addr_selected == 0) {
4386 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4387 /* KAME hack: embed scopeid */
4388 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4389 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4393 /* Cache the source address */
4394 net->ro._s_addr = sctp_source_address_selection(inp,
4400 (void)sa6_recoverscope(sin6);
4401 net->src_addr_selected = 1;
4403 if (net->ro._s_addr == NULL) {
4404 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4405 net->src_addr_selected = 0;
4406 sctp_handle_no_route(stcb, net, so_locked);
4407 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4409 return (EHOSTUNREACH);
4411 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4413 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4414 /* KAME hack: embed scopeid */
4415 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4416 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4420 if (over_addr == NULL) {
4421 struct sctp_ifa *_lsrc;
4423 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4427 if (_lsrc == NULL) {
4428 sctp_handle_no_route(stcb, net, so_locked);
4429 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4431 return (EHOSTUNREACH);
4433 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4434 sctp_free_ifa(_lsrc);
4436 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4437 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4439 (void)sa6_recoverscope(sin6);
4441 lsa6->sin6_port = inp->sctp_lport;
4443 if (ro->ro_nh == NULL) {
4445 * src addr selection failed to find a route
4446 * (or valid source addr), so we can't get
4449 sctp_handle_no_route(stcb, net, so_locked);
4450 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4452 return (EHOSTUNREACH);
4455 * XXX: sa6 may not have a valid sin6_scope_id in
4456 * the non-SCOPEDROUTING case.
4458 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4459 lsa6_storage.sin6_family = AF_INET6;
4460 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4461 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4462 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4463 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4468 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4469 lsa6_storage.sin6_port = inp->sctp_lport;
4470 lsa6 = &lsa6_storage;
4471 ip6h->ip6_src = lsa6->sin6_addr;
4474 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4475 sctp_handle_no_route(stcb, net, so_locked);
4476 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4478 return (EHOSTUNREACH);
4480 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4481 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4482 udp->uh_dport = port;
4483 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4485 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4487 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4490 sctphdr->src_port = src_port;
4491 sctphdr->dest_port = dest_port;
4492 sctphdr->v_tag = v_tag;
4493 sctphdr->checksum = 0;
4496 * We set the hop limit now since there is a good
4497 * chance that our ro pointer is now filled
4499 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4500 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4503 /* Copy to be sure something bad is not happening */
4504 sin6->sin6_addr = ip6h->ip6_dst;
4505 lsa6->sin6_addr = ip6h->ip6_src;
4508 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4509 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4510 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4511 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4512 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4514 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4516 * preserve the port and scope for link
4519 prev_scope = sin6->sin6_scope_id;
4520 prev_port = sin6->sin6_port;
4523 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4524 /* failed to prepend data, give up */
4526 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4529 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4531 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4532 SCTP_STAT_INCR(sctps_sendswcrc);
4533 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4534 udp->uh_sum = 0xffff;
4537 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4538 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4539 SCTP_STAT_INCR(sctps_sendhwcrc);
4541 /* send it out. table id is taken from stcb */
4542 #ifdef SCTP_PACKET_LOGGING
4543 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4544 sctp_packet_log(o_pak);
4546 SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
4547 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, inp, vrf_id);
4549 /* for link local this must be done */
4550 sin6->sin6_scope_id = prev_scope;
4551 sin6->sin6_port = prev_port;
4553 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4555 UDPSTAT_INC(udps_opackets);
4557 SCTP_STAT_INCR(sctps_sendpackets);
4558 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4560 SCTP_STAT_INCR(sctps_senderrors);
4563 /* Now if we had a temp route free it */
4567 * PMTU check versus smallest asoc MTU goes
4570 if (ro->ro_nh == NULL) {
4571 /* Route was freed */
4572 if (net->ro._s_addr &&
4573 net->src_addr_selected) {
4574 sctp_free_ifa(net->ro._s_addr);
4575 net->ro._s_addr = NULL;
4577 net->src_addr_selected = 0;
4579 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4580 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4583 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4586 mtu -= sizeof(struct udphdr);
4588 if (mtu < net->mtu) {
4589 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4590 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4596 if (ND_IFINFO(ifp)->linkmtu &&
4597 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4598 sctp_mtu_size_reset(inp,
4600 ND_IFINFO(ifp)->linkmtu);
4608 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4609 ((struct sockaddr *)to)->sa_family);
4611 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4617 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked)
4619 struct mbuf *m, *m_last;
4620 struct sctp_nets *net;
4621 struct sctp_init_chunk *init;
4622 struct sctp_supported_addr_param *sup_addr;
4623 struct sctp_adaptation_layer_indication *ali;
4624 struct sctp_supported_chunk_types_param *pr_supported;
4625 struct sctp_paramhdr *ph;
4626 int cnt_inits_to = 0;
4628 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4630 /* INIT's always go to the primary (and usually ONLY address) */
4631 net = stcb->asoc.primary_destination;
4633 net = TAILQ_FIRST(&stcb->asoc.nets);
4638 /* we confirm any address we send an INIT to */
4639 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4640 (void)sctp_set_primary_addr(stcb, NULL, net);
4642 /* we confirm any address we send an INIT to */
4643 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4645 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4647 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4649 * special hook, if we are sending to link local it will not
4650 * show up in our private address count.
4652 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4656 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4657 /* This case should not happen */
4658 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4661 /* start the INIT timer */
4662 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4664 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4666 /* No memory, INIT timer will re-attempt. */
4667 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4670 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4672 /* Now lets put the chunk header in place */
4673 init = mtod(m, struct sctp_init_chunk *);
4674 /* now the chunk header */
4675 init->ch.chunk_type = SCTP_INITIATION;
4676 init->ch.chunk_flags = 0;
4677 /* fill in later from mbuf we build */
4678 init->ch.chunk_length = 0;
4679 /* place in my tag */
4680 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4681 /* set up some of the credits. */
4682 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4683 SCTP_MINIMAL_RWND));
4684 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4685 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4686 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4688 /* Adaptation layer indication parameter */
4689 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4690 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4691 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4692 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4693 ali->ph.param_length = htons(parameter_len);
4694 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4695 chunk_len += parameter_len;
4699 if (stcb->asoc.ecn_supported == 1) {
4700 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4701 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4702 ph->param_type = htons(SCTP_ECN_CAPABLE);
4703 ph->param_length = htons(parameter_len);
4704 chunk_len += parameter_len;
4707 /* PR-SCTP supported parameter */
4708 if (stcb->asoc.prsctp_supported == 1) {
4709 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4710 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4711 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4712 ph->param_length = htons(parameter_len);
4713 chunk_len += parameter_len;
4716 /* Add NAT friendly parameter. */
4717 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4718 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4719 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4720 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4721 ph->param_length = htons(parameter_len);
4722 chunk_len += parameter_len;
4725 /* And now tell the peer which extensions we support */
4727 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4728 if (stcb->asoc.prsctp_supported == 1) {
4729 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4730 if (stcb->asoc.idata_supported) {
4731 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4734 if (stcb->asoc.auth_supported == 1) {
4735 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4737 if (stcb->asoc.asconf_supported == 1) {
4738 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4739 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4741 if (stcb->asoc.reconfig_supported == 1) {
4742 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4744 if (stcb->asoc.idata_supported) {
4745 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4747 if (stcb->asoc.nrsack_supported == 1) {
4748 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4750 if (stcb->asoc.pktdrop_supported == 1) {
4751 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4754 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4755 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4756 pr_supported->ph.param_length = htons(parameter_len);
4757 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4758 chunk_len += parameter_len;
4760 /* add authentication parameters */
4761 if (stcb->asoc.auth_supported) {
4762 /* attach RANDOM parameter, if available */
4763 if (stcb->asoc.authinfo.random != NULL) {
4764 struct sctp_auth_random *randp;
4766 if (padding_len > 0) {
4767 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4768 chunk_len += padding_len;
4771 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4772 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4773 /* random key already contains the header */
4774 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4775 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4776 chunk_len += parameter_len;
4778 /* add HMAC_ALGO parameter */
4779 if (stcb->asoc.local_hmacs != NULL) {
4780 struct sctp_auth_hmac_algo *hmacs;
4782 if (padding_len > 0) {
4783 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4784 chunk_len += padding_len;
4787 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4788 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4789 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4790 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4791 hmacs->ph.param_length = htons(parameter_len);
4792 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4793 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4794 chunk_len += parameter_len;
4796 /* add CHUNKS parameter */
4797 if (stcb->asoc.local_auth_chunks != NULL) {
4798 struct sctp_auth_chunk_list *chunks;
4800 if (padding_len > 0) {
4801 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4802 chunk_len += padding_len;
4805 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4806 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4807 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4808 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4809 chunks->ph.param_length = htons(parameter_len);
4810 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4811 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4812 chunk_len += parameter_len;
4816 /* now any cookie time extensions */
4817 if (stcb->asoc.cookie_preserve_req > 0) {
4818 struct sctp_cookie_perserve_param *cookie_preserve;
4820 if (padding_len > 0) {
4821 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4822 chunk_len += padding_len;
4825 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4826 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4827 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4828 cookie_preserve->ph.param_length = htons(parameter_len);
4829 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4830 stcb->asoc.cookie_preserve_req = 0;
4831 chunk_len += parameter_len;
4834 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4837 if (padding_len > 0) {
4838 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4839 chunk_len += padding_len;
4842 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4843 if (stcb->asoc.scope.ipv4_addr_legal) {
4844 parameter_len += (uint16_t)sizeof(uint16_t);
4846 if (stcb->asoc.scope.ipv6_addr_legal) {
4847 parameter_len += (uint16_t)sizeof(uint16_t);
4849 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4850 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4851 sup_addr->ph.param_length = htons(parameter_len);
4853 if (stcb->asoc.scope.ipv4_addr_legal) {
4854 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4856 if (stcb->asoc.scope.ipv6_addr_legal) {
4857 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4859 padding_len = 4 - 2 * i;
4860 chunk_len += parameter_len;
4863 SCTP_BUF_LEN(m) = chunk_len;
4864 /* now the addresses */
4866 * To optimize this we could put the scoping stuff into a structure
4867 * and remove the individual uint8's from the assoc structure. Then
4868 * we could just sifa in the address within the stcb. But for now
4869 * this is a quick hack to get the address stuff teased apart.
4871 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4873 &padding_len, &chunk_len);
4875 init->ch.chunk_length = htons(chunk_len);
4876 if (padding_len > 0) {
4877 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4882 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4883 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4884 (struct sockaddr *)&net->ro._l_addr,
4885 m, 0, NULL, 0, 0, 0, 0,
4886 inp->sctp_lport, stcb->rport, htonl(0),
4890 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4891 if (error == ENOBUFS) {
4892 stcb->asoc.ifp_had_enobuf = 1;
4893 SCTP_STAT_INCR(sctps_lowlevelerr);
4896 stcb->asoc.ifp_had_enobuf = 0;
4898 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4899 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4903 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4904 int param_offset, int *abort_processing,
4905 struct sctp_chunkhdr *cp,
4910 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4911 * being equal to the beginning of the params i.e. (iphlen +
4912 * sizeof(struct sctp_init_msg) parse through the parameters to the
4913 * end of the mbuf verifying that all parameters are known.
4915 * For unknown parameters build and return a mbuf with
4916 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4917 * processing this chunk stop, and set *abort_processing to 1.
4919 * By having param_offset be pre-set to where parameters begin it is
4920 * hoped that this routine may be reused in the future by new
4923 struct sctp_paramhdr *phdr, params;
4925 struct mbuf *mat, *m_tmp, *op_err, *op_err_last;
4926 int at, limit, pad_needed;
4927 uint16_t ptype, plen, padded_size;
4929 *abort_processing = 0;
4930 if (cookie_found != NULL) {
4934 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4939 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4940 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4941 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4942 ptype = ntohs(phdr->param_type);
4943 plen = ntohs(phdr->param_length);
4944 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4945 /* wacked parameter */
4946 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4949 limit -= SCTP_SIZE32(plen);
4951 * All parameters for all chunks that we know/understand are
4952 * listed here. We process them other places and make
4953 * appropriate stop actions per the upper bits. However this
4954 * is the generic routine processor's can call to get back
4955 * an operr.. to either incorporate (init-ack) or send.
4957 padded_size = SCTP_SIZE32(plen);
4959 /* Param's with variable size */
4960 case SCTP_HEARTBEAT_INFO:
4961 case SCTP_UNRECOG_PARAM:
4962 case SCTP_ERROR_CAUSE_IND:
4966 case SCTP_STATE_COOKIE:
4967 if (cookie_found != NULL) {
4972 /* Param's with variable size within a range */
4973 case SCTP_CHUNK_LIST:
4974 case SCTP_SUPPORTED_CHUNK_EXT:
4975 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4976 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4981 case SCTP_SUPPORTED_ADDRTYPE:
4982 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4983 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4989 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4990 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4995 case SCTP_SET_PRIM_ADDR:
4996 case SCTP_DEL_IP_ADDRESS:
4997 case SCTP_ADD_IP_ADDRESS:
4998 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4999 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5000 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5005 /* Param's with a fixed size */
5006 case SCTP_IPV4_ADDRESS:
5007 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5008 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5013 case SCTP_IPV6_ADDRESS:
5014 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5015 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5020 case SCTP_COOKIE_PRESERVE:
5021 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5022 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5027 case SCTP_HAS_NAT_SUPPORT:
5030 case SCTP_PRSCTP_SUPPORTED:
5031 if (padded_size != sizeof(struct sctp_paramhdr)) {
5032 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5037 case SCTP_ECN_CAPABLE:
5038 if (padded_size != sizeof(struct sctp_paramhdr)) {
5039 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5044 case SCTP_ULP_ADAPTATION:
5045 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5046 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5051 case SCTP_SUCCESS_REPORT:
5052 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5058 case SCTP_HOSTNAME_ADDRESS:
5060 /* Hostname parameters are deprecated. */
5061 struct sctp_gen_error_cause *cause;
5064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5065 *abort_processing = 1;
5066 sctp_m_freem(op_err);
5070 l_len = SCTP_MIN_OVERHEAD;
5072 l_len = SCTP_MIN_V4_OVERHEAD;
5074 l_len += sizeof(struct sctp_chunkhdr);
5075 l_len += sizeof(struct sctp_gen_error_cause);
5076 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5077 if (op_err != NULL) {
5079 * Pre-reserve space for IP, SCTP,
5083 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5085 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5087 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5088 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5089 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5090 cause = mtod(op_err, struct sctp_gen_error_cause *);
5091 cause->code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5092 cause->length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
5093 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5094 if (SCTP_BUF_NEXT(op_err) == NULL) {
5095 sctp_m_freem(op_err);
5104 * we do not recognize the parameter figure out what
5107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5108 if ((ptype & 0x4000) == 0x4000) {
5109 /* Report bit is set?? */
5110 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5111 if (op_err == NULL) {
5114 /* Ok need to try to get an mbuf */
5116 l_len = SCTP_MIN_OVERHEAD;
5118 l_len = SCTP_MIN_V4_OVERHEAD;
5120 l_len += sizeof(struct sctp_chunkhdr);
5121 l_len += sizeof(struct sctp_paramhdr);
5122 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5124 SCTP_BUF_LEN(op_err) = 0;
5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5132 op_err_last = op_err;
5135 if (op_err != NULL) {
5136 /* If we have space */
5137 struct sctp_paramhdr *param;
5139 if (pad_needed > 0) {
5140 op_err_last = sctp_add_pad_tombuf(op_err_last, pad_needed);
5142 if (op_err_last == NULL) {
5143 sctp_m_freem(op_err);
5146 goto more_processing;
5148 if (M_TRAILINGSPACE(op_err_last) < (int)sizeof(struct sctp_paramhdr)) {
5149 m_tmp = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
5150 if (m_tmp == NULL) {
5151 sctp_m_freem(op_err);
5154 goto more_processing;
5156 SCTP_BUF_LEN(m_tmp) = 0;
5157 SCTP_BUF_NEXT(m_tmp) = NULL;
5158 SCTP_BUF_NEXT(op_err_last) = m_tmp;
5159 op_err_last = m_tmp;
5161 param = (struct sctp_paramhdr *)(mtod(op_err_last, caddr_t)+SCTP_BUF_LEN(op_err_last));
5162 param->param_type = htons(SCTP_UNRECOG_PARAM);
5163 param->param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
5164 SCTP_BUF_LEN(op_err_last) += sizeof(struct sctp_paramhdr);
5165 SCTP_BUF_NEXT(op_err_last) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5166 if (SCTP_BUF_NEXT(op_err_last) == NULL) {
5167 sctp_m_freem(op_err);
5170 goto more_processing;
5172 while (SCTP_BUF_NEXT(op_err_last) != NULL) {
5173 op_err_last = SCTP_BUF_NEXT(op_err_last);
5176 if (plen % 4 != 0) {
5177 pad_needed = 4 - (plen % 4);
5184 if ((ptype & 0x8000) == 0x0000) {
5185 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5188 /* skip this chunk and continue processing */
5189 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5190 at += SCTP_SIZE32(plen);
5194 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5198 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5199 *abort_processing = 1;
5200 sctp_m_freem(op_err);
5204 struct sctp_paramhdr *param;
5207 l_len = SCTP_MIN_OVERHEAD;
5209 l_len = SCTP_MIN_V4_OVERHEAD;
5211 l_len += sizeof(struct sctp_chunkhdr);
5212 l_len += (2 * sizeof(struct sctp_paramhdr));
5213 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5215 SCTP_BUF_LEN(op_err) = 0;
5217 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5219 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5221 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5222 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5223 SCTP_BUF_LEN(op_err) = 2 * sizeof(struct sctp_paramhdr);
5224 param = mtod(op_err, struct sctp_paramhdr *);
5225 param->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5226 param->param_length = htons(2 * sizeof(struct sctp_paramhdr));
5228 param->param_type = htons(ptype);
5229 param->param_length = htons(plen);
5236 * Given a INIT chunk, look through the parameters to verify that there
5237 * are no new addresses.
5238 * Return true, if there is a new address or there is a problem parsing
5239 the parameters. Provide an optional error cause used when sending an ABORT.
5240 * Return false, if there are no new addresses and there is no problem in
5241 parameter processing.
5244 sctp_are_there_new_addresses(struct sctp_association *asoc,
5245 struct mbuf *in_initpkt, int offset, int limit, struct sockaddr *src,
5246 struct mbuf **op_err)
5248 struct sockaddr *sa_touse;
5249 struct sockaddr *sa;
5250 struct sctp_paramhdr *phdr, params;
5251 struct sctp_nets *net;
5253 struct sockaddr_in sin4, *sa4;
5256 struct sockaddr_in6 sin6, *sa6;
5258 uint16_t ptype, plen;
5259 bool fnd, check_src;
5263 memset(&sin4, 0, sizeof(sin4));
5264 sin4.sin_family = AF_INET;
5265 sin4.sin_len = sizeof(sin4);
5268 memset(&sin6, 0, sizeof(sin6));
5269 sin6.sin6_family = AF_INET6;
5270 sin6.sin6_len = sizeof(sin6);
5272 /* First what about the src address of the pkt ? */
5274 switch (src->sa_family) {
5277 if (asoc->scope.ipv4_addr_legal) {
5284 if (asoc->scope.ipv6_addr_legal) {
5295 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5296 sa = (struct sockaddr *)&net->ro._l_addr;
5297 if (sa->sa_family == src->sa_family) {
5299 if (sa->sa_family == AF_INET) {
5300 struct sockaddr_in *src4;
5302 sa4 = (struct sockaddr_in *)sa;
5303 src4 = (struct sockaddr_in *)src;
5304 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5311 if (sa->sa_family == AF_INET6) {
5312 struct sockaddr_in6 *src6;
5314 sa6 = (struct sockaddr_in6 *)sa;
5315 src6 = (struct sockaddr_in6 *)src;
5316 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5326 * If sending an ABORT in case of an additional
5327 * address, don't use the new address error cause.
5328 * This looks no different than if no listener was
5331 *op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), "Address added");
5335 /* Ok so far lets munge through the rest of the packet */
5336 offset += sizeof(struct sctp_init_chunk);
5337 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5340 ptype = ntohs(phdr->param_type);
5341 plen = ntohs(phdr->param_length);
5342 if (offset + plen > limit) {
5343 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Partial parameter");
5346 if (plen < sizeof(struct sctp_paramhdr)) {
5347 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length too small");
5352 case SCTP_IPV4_ADDRESS:
5354 struct sctp_ipv4addr_param *p4, p4_buf;
5356 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5357 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length illegal");
5360 phdr = sctp_get_next_param(in_initpkt, offset,
5361 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5363 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "");
5366 if (asoc->scope.ipv4_addr_legal) {
5367 p4 = (struct sctp_ipv4addr_param *)phdr;
5368 sin4.sin_addr.s_addr = p4->addr;
5369 sa_touse = (struct sockaddr *)&sin4;
5375 case SCTP_IPV6_ADDRESS:
5377 struct sctp_ipv6addr_param *p6, p6_buf;
5379 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5380 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "Parameter length illegal");
5383 phdr = sctp_get_next_param(in_initpkt, offset,
5384 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5386 *op_err = sctp_generate_cause(SCTP_CAUSE_PROTOCOL_VIOLATION, "");
5389 if (asoc->scope.ipv6_addr_legal) {
5390 p6 = (struct sctp_ipv6addr_param *)phdr;
5391 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5393 sa_touse = (struct sockaddr *)&sin6;
5403 /* ok, sa_touse points to one to check */
5405 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5406 sa = (struct sockaddr *)&net->ro._l_addr;
5407 if (sa->sa_family != sa_touse->sa_family) {
5411 if (sa->sa_family == AF_INET) {
5412 sa4 = (struct sockaddr_in *)sa;
5413 if (sa4->sin_addr.s_addr ==
5414 sin4.sin_addr.s_addr) {
5421 if (sa->sa_family == AF_INET6) {
5422 sa6 = (struct sockaddr_in6 *)sa;
5423 if (SCTP6_ARE_ADDR_EQUAL(
5433 * If sending an ABORT in case of an
5434 * additional address, don't use the new
5435 * address error cause. This looks no
5436 * different than if no listener was
5439 *op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), "Address added");
5443 offset += SCTP_SIZE32(plen);
5444 if (offset >= limit) {
5447 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5453 * Given a MBUF chain that was sent into us containing an INIT. Build a
5454 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5455 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5456 * message (i.e. the struct sctp_init_msg).
5459 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5460 struct sctp_nets *src_net, struct mbuf *init_pkt,
5461 int iphlen, int offset,
5462 struct sockaddr *src, struct sockaddr *dst,
5463 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5464 uint8_t mflowtype, uint32_t mflowid,
5465 uint32_t vrf_id, uint16_t port)
5467 struct sctp_association *asoc;
5468 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5469 struct sctp_init_ack_chunk *initack;
5470 struct sctp_adaptation_layer_indication *ali;
5471 struct sctp_supported_chunk_types_param *pr_supported;
5472 struct sctp_paramhdr *ph;
5473 union sctp_sockstore *over_addr;
5474 struct sctp_scoping scp;
5477 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5478 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5479 struct sockaddr_in *sin;
5482 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5483 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5484 struct sockaddr_in6 *sin6;
5486 struct sockaddr *to;
5487 struct sctp_state_cookie stc;
5488 struct sctp_nets *net = NULL;
5489 uint8_t *signature = NULL;
5490 int cnt_inits_to = 0;
5491 uint16_t his_limit, i_want;
5493 int nat_friendly = 0;
5496 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5503 if ((asoc != NULL) &&
5504 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5505 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, offset + ntohs(init_chk->ch.chunk_length), src, &op_err)) {
5507 * new addresses, out of here in non-cookie-wait
5510 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5511 mflowtype, mflowid, inp->fibnum,
5515 if (src_net != NULL && (src_net->port != port)) {
5517 * change of remote encapsulation port, out of here
5518 * in non-cookie-wait states
5520 * Send an ABORT, without an specific error cause.
5521 * This looks no different than if no listener was
5524 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5525 "Remote encapsulation port changed");
5526 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5527 mflowtype, mflowid, inp->fibnum,
5533 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5534 (offset + sizeof(struct sctp_init_chunk)),
5536 (struct sctp_chunkhdr *)init_chk,
5537 &nat_friendly, NULL);
5540 if (op_err == NULL) {
5541 char msg[SCTP_DIAG_INFO_LEN];
5543 SCTP_SNPRINTF(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5544 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5547 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5548 init_chk->init.initiate_tag, op_err,
5549 mflowtype, mflowid, inp->fibnum,
5553 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5555 /* No memory, INIT timer will re-attempt. */
5556 sctp_m_freem(op_err);
5559 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5563 * We might not overwrite the identification[] completely and on
5564 * some platforms time_entered will contain some padding. Therefore
5565 * zero out the cookie to avoid putting uninitialized memory on the
5568 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5570 /* the time I built cookie */
5571 (void)SCTP_GETTIME_TIMEVAL(&now);
5572 stc.time_entered.tv_sec = now.tv_sec;
5573 stc.time_entered.tv_usec = now.tv_usec;
5575 /* populate any tie tags */
5577 /* unlock before tag selections */
5578 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5579 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5580 stc.cookie_life = asoc->cookie_life;
5581 net = asoc->primary_destination;
5583 stc.tie_tag_my_vtag = 0;
5584 stc.tie_tag_peer_vtag = 0;
5585 /* life I will award this cookie */
5586 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5589 /* copy in the ports for later check */
5590 stc.myport = sh->dest_port;
5591 stc.peerport = sh->src_port;
5594 * If we wanted to honor cookie life extensions, we would add to
5595 * stc.cookie_life. For now we should NOT honor any extension
5597 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5598 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5599 stc.ipv6_addr_legal = 1;
5600 if (SCTP_IPV6_V6ONLY(inp)) {
5601 stc.ipv4_addr_legal = 0;
5603 stc.ipv4_addr_legal = 1;
5606 stc.ipv6_addr_legal = 0;
5607 stc.ipv4_addr_legal = 1;
5612 switch (dst->sa_family) {
5616 /* lookup address */
5617 stc.address[0] = src4->sin_addr.s_addr;
5621 stc.addr_type = SCTP_IPV4_ADDRESS;
5622 /* local from address */
5623 stc.laddress[0] = dst4->sin_addr.s_addr;
5624 stc.laddress[1] = 0;
5625 stc.laddress[2] = 0;
5626 stc.laddress[3] = 0;
5627 stc.laddr_type = SCTP_IPV4_ADDRESS;
5628 /* scope_id is only for v6 */
5630 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5631 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5634 /* Must use the address in this case */
5635 if (sctp_is_address_on_local_host(src, vrf_id)) {
5636 stc.loopback_scope = 1;
5639 stc.local_scope = 0;
5647 stc.addr_type = SCTP_IPV6_ADDRESS;
5648 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5649 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5650 if (sctp_is_address_on_local_host(src, vrf_id)) {
5651 stc.loopback_scope = 1;
5652 stc.local_scope = 0;
5655 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5656 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5658 * If the new destination or source
5659 * is a LINK_LOCAL we must have
5660 * common both site and local scope.
5661 * Don't set local scope though
5662 * since we must depend on the
5663 * source to be added implicitly. We
5664 * cannot assure just because we
5665 * share one link that all links are
5668 stc.local_scope = 0;
5672 * we start counting for the private
5673 * address stuff at 1. since the
5674 * link local we source from won't
5675 * show up in our scoped count.
5679 * pull out the scope_id from
5682 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5683 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5685 * If the new destination or source
5686 * is SITE_LOCAL then we must have
5687 * site scope in common.
5691 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5692 stc.laddr_type = SCTP_IPV6_ADDRESS;
5702 /* set the scope per the existing tcb */
5705 struct sctp_nets *lnet;
5708 stc.loopback_scope = asoc->scope.loopback_scope;
5709 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5710 stc.site_scope = asoc->scope.site_scope;
5711 stc.local_scope = asoc->scope.local_scope;
5713 /* Why do we not consider IPv4 LL addresses? */
5714 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5715 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5716 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5718 * if we have a LL address, start
5726 /* use the net pointer */
5727 to = (struct sockaddr *)&net->ro._l_addr;
5728 switch (to->sa_family) {
5731 sin = (struct sockaddr_in *)to;
5732 stc.address[0] = sin->sin_addr.s_addr;
5736 stc.addr_type = SCTP_IPV4_ADDRESS;
5737 if (net->src_addr_selected == 0) {
5739 * strange case here, the INIT should have
5740 * did the selection.
5742 net->ro._s_addr = sctp_source_address_selection(inp,
5743 stcb, (sctp_route_t *)&net->ro,
5745 if (net->ro._s_addr == NULL) {
5746 sctp_m_freem(op_err);
5751 net->src_addr_selected = 1;
5753 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5754 stc.laddress[1] = 0;
5755 stc.laddress[2] = 0;
5756 stc.laddress[3] = 0;
5757 stc.laddr_type = SCTP_IPV4_ADDRESS;
5758 /* scope_id is only for v6 */
5764 sin6 = (struct sockaddr_in6 *)to;
5765 memcpy(&stc.address, &sin6->sin6_addr,
5766 sizeof(struct in6_addr));
5767 stc.addr_type = SCTP_IPV6_ADDRESS;
5768 stc.scope_id = sin6->sin6_scope_id;
5769 if (net->src_addr_selected == 0) {
5771 * strange case here, the INIT should have
5772 * done the selection.
5774 net->ro._s_addr = sctp_source_address_selection(inp,
5775 stcb, (sctp_route_t *)&net->ro,
5777 if (net->ro._s_addr == NULL) {
5778 sctp_m_freem(op_err);
5783 net->src_addr_selected = 1;
5785 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5786 sizeof(struct in6_addr));
5787 stc.laddr_type = SCTP_IPV6_ADDRESS;
5792 /* Now lets put the SCTP header in place */
5793 initack = mtod(m, struct sctp_init_ack_chunk *);
5794 /* Save it off for quick ref */
5795 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5797 memcpy(stc.identification, SCTP_VERSION_STRING,
5798 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5799 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5800 /* now the chunk header */
5801 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5802 initack->ch.chunk_flags = 0;
5803 /* fill in later from mbuf we build */
5804 initack->ch.chunk_length = 0;
5805 /* place in my tag */
5806 if ((asoc != NULL) &&
5807 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5808 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5809 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5810 /* re-use the v-tags and init-seq here */
5811 initack->init.initiate_tag = htonl(asoc->my_vtag);
5812 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5814 uint32_t vtag, itsn;
5817 atomic_add_int(&asoc->refcnt, 1);
5818 SCTP_TCB_UNLOCK(stcb);
5820 SCTP_INP_INFO_RLOCK();
5821 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5822 SCTP_INP_INFO_RUNLOCK();
5823 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5825 * Got a duplicate vtag on some guy behind a
5826 * nat make sure we don't use it.
5830 initack->init.initiate_tag = htonl(vtag);
5831 /* get a TSN to use too */
5832 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5833 initack->init.initial_tsn = htonl(itsn);
5834 SCTP_TCB_LOCK(stcb);
5835 atomic_subtract_int(&asoc->refcnt, 1);
5837 SCTP_INP_INCR_REF(inp);
5838 SCTP_INP_RUNLOCK(inp);
5839 SCTP_INP_INFO_RLOCK();
5840 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5841 SCTP_INP_INFO_RUNLOCK();
5842 initack->init.initiate_tag = htonl(vtag);
5843 /* get a TSN to use too */
5844 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5845 SCTP_INP_RLOCK(inp);
5846 SCTP_INP_DECR_REF(inp);
5849 /* save away my tag to */
5850 stc.my_vtag = initack->init.initiate_tag;
5852 /* set up some of the credits. */
5853 so = inp->sctp_socket;
5855 /* memory problem */
5856 sctp_m_freem(op_err);
5860 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5862 /* set what I want */
5863 his_limit = ntohs(init_chk->init.num_inbound_streams);
5864 /* choose what I want */
5866 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5867 i_want = asoc->streamoutcnt;
5869 i_want = asoc->pre_open_streams;
5872 i_want = inp->sctp_ep.pre_open_stream_count;
5874 if (his_limit < i_want) {
5875 /* I Want more :< */
5876 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5878 /* I can have what I want :> */
5879 initack->init.num_outbound_streams = htons(i_want);
5881 /* tell him his limit. */
5882 initack->init.num_inbound_streams =
5883 htons(inp->sctp_ep.max_open_streams_intome);
5885 /* adaptation layer indication parameter */
5886 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5887 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5888 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5889 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5890 ali->ph.param_length = htons(parameter_len);
5891 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5892 chunk_len += parameter_len;
5896 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5897 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5898 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5899 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5900 ph->param_type = htons(SCTP_ECN_CAPABLE);
5901 ph->param_length = htons(parameter_len);
5902 chunk_len += parameter_len;
5905 /* PR-SCTP supported parameter */
5906 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5907 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5908 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5909 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5910 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5911 ph->param_length = htons(parameter_len);
5912 chunk_len += parameter_len;
5915 /* Add NAT friendly parameter */
5917 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5918 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5919 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5920 ph->param_length = htons(parameter_len);
5921 chunk_len += parameter_len;
5924 /* And now tell the peer which extensions we support */
5926 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5927 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5928 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5929 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5930 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5931 ((asoc == NULL) && (inp->idata_supported == 1))) {
5932 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5935 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5936 ((asoc == NULL) && (inp->auth_supported == 1))) {
5937 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5939 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5940 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5941 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5942 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5944 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5945 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5946 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5948 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5949 ((asoc == NULL) && (inp->idata_supported == 1))) {
5950 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5952 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5953 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5954 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5956 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5957 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5958 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5961 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5962 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5963 pr_supported->ph.param_length = htons(parameter_len);
5964 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5965 chunk_len += parameter_len;
5968 /* add authentication parameters */
5969 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5970 ((asoc == NULL) && (inp->auth_supported == 1))) {
5971 struct sctp_auth_random *randp;
5972 struct sctp_auth_hmac_algo *hmacs;
5973 struct sctp_auth_chunk_list *chunks;
5975 if (padding_len > 0) {
5976 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5977 chunk_len += padding_len;
5980 /* generate and add RANDOM parameter */
5981 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5982 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
5983 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5984 randp->ph.param_type = htons(SCTP_RANDOM);
5985 randp->ph.param_length = htons(parameter_len);
5986 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5987 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5988 chunk_len += parameter_len;
5990 if (padding_len > 0) {
5991 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5992 chunk_len += padding_len;
5995 /* add HMAC_ALGO parameter */
5996 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5997 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
5998 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5999 (uint8_t *)hmacs->hmac_ids);
6000 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6001 hmacs->ph.param_length = htons(parameter_len);
6002 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6003 chunk_len += parameter_len;
6005 if (padding_len > 0) {
6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6007 chunk_len += padding_len;
6010 /* add CHUNKS parameter */
6011 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6012 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6013 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6014 chunks->chunk_types);
6015 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6016 chunks->ph.param_length = htons(parameter_len);
6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6018 chunk_len += parameter_len;
6020 SCTP_BUF_LEN(m) = chunk_len;
6022 /* now the addresses */
6024 * To optimize this we could put the scoping stuff into a structure
6025 * and remove the individual uint8's from the stc structure. Then we
6026 * could just sifa in the address within the stc.. but for now this
6027 * is a quick hack to get the address stuff teased apart.
6029 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6030 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6031 scp.loopback_scope = stc.loopback_scope;
6032 scp.ipv4_local_scope = stc.ipv4_scope;
6033 scp.local_scope = stc.local_scope;
6034 scp.site_scope = stc.site_scope;
6035 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6037 &padding_len, &chunk_len);
6038 /* padding_len can only be positive, if no addresses have been added */
6039 if (padding_len > 0) {
6040 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6041 chunk_len += padding_len;
6042 SCTP_BUF_LEN(m) += padding_len;
6046 /* tack on the operational error if present */
6049 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6050 parameter_len += SCTP_BUF_LEN(m_tmp);
6052 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6053 SCTP_BUF_NEXT(m_last) = op_err;
6054 while (SCTP_BUF_NEXT(m_last) != NULL) {
6055 m_last = SCTP_BUF_NEXT(m_last);
6057 chunk_len += parameter_len;
6059 if (padding_len > 0) {
6060 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6061 if (m_last == NULL) {
6062 /* Houston we have a problem, no space */
6066 chunk_len += padding_len;
6069 /* Now we must build a cookie */
6070 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6071 if (m_cookie == NULL) {
6072 /* memory problem */
6076 /* Now append the cookie to the end and update the space/size */
6077 SCTP_BUF_NEXT(m_last) = m_cookie;
6079 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6080 parameter_len += SCTP_BUF_LEN(m_tmp);
6081 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6085 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6086 chunk_len += parameter_len;
6089 * Place in the size, but we don't include the last pad (if any) in
6092 initack->ch.chunk_length = htons(chunk_len);
6095 * Time to sign the cookie, we don't sign over the cookie signature
6096 * though thus we set trailer.
6098 (void)sctp_hmac_m(SCTP_HMAC,
6099 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6100 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6101 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6103 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6104 * here since the timer will drive a retranmission.
6106 if (padding_len > 0) {
6107 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6112 if (stc.loopback_scope) {
6113 over_addr = (union sctp_sockstore *)dst;
6118 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6120 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6123 SCTP_SO_NOT_LOCKED))) {
6124 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6125 if (error == ENOBUFS) {
6127 asoc->ifp_had_enobuf = 1;
6129 SCTP_STAT_INCR(sctps_lowlevelerr);
6133 asoc->ifp_had_enobuf = 0;
6136 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6140 sctp_prune_prsctp(struct sctp_tcb *stcb,
6141 struct sctp_association *asoc,
6142 struct sctp_sndrcvinfo *srcv,
6146 struct sctp_tmit_chunk *chk, *nchk;
6148 SCTP_TCB_LOCK_ASSERT(stcb);
6149 if ((asoc->prsctp_supported) &&
6150 (asoc->sent_queue_cnt_removeable > 0)) {
6151 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6153 * Look for chunks marked with the PR_SCTP flag AND
6154 * the buffer space flag. If the one being sent is
6155 * equal or greater priority then purge the old one
6156 * and free some space.
6158 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6160 * This one is PR-SCTP AND buffer space
6163 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6165 * Lower numbers equates to higher
6166 * priority. So if the one we are
6167 * looking at has a larger priority,
6168 * we want to drop the data and NOT
6173 * We release the book_size
6174 * if the mbuf is here
6179 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6183 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6186 freed_spc += ret_spc;
6187 if (freed_spc >= dataout) {
6190 } /* if chunk was present */
6191 } /* if of sufficient priority */
6192 } /* if chunk has enabled */
6193 } /* tailqforeach */
6195 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6196 /* Here we must move to the sent queue and mark */
6197 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6198 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6201 * We release the book_size
6202 * if the mbuf is here
6206 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6209 freed_spc += ret_spc;
6210 if (freed_spc >= dataout) {
6213 } /* end if chk->data */
6214 } /* end if right class */
6215 } /* end if chk pr-sctp */
6216 } /* tailqforeachsafe (chk) */
6217 } /* if enabled in asoc */
6221 sctp_get_frag_point(struct sctp_tcb *stcb)
6223 struct sctp_association *asoc;
6224 uint32_t frag_point, overhead;
6227 /* Consider IP header and SCTP common header. */
6228 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6229 overhead = SCTP_MIN_OVERHEAD;
6231 overhead = SCTP_MIN_V4_OVERHEAD;
6233 /* Consider DATA/IDATA chunk header and AUTH header, if needed. */
6234 if (asoc->idata_supported) {
6235 overhead += sizeof(struct sctp_idata_chunk);
6236 if (sctp_auth_is_required_chunk(SCTP_IDATA, asoc->peer_auth_chunks)) {
6237 overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id);
6240 overhead += sizeof(struct sctp_idata_chunk);
6241 if (sctp_auth_is_required_chunk(SCTP_DATA, asoc->peer_auth_chunks)) {
6242 overhead += sctp_get_auth_chunk_len(asoc->peer_hmac_id);
6245 /* Consider padding. */
6246 if (asoc->smallest_mtu % 4) {
6247 overhead += (asoc->smallest_mtu % 4);
6249 KASSERT(asoc->smallest_mtu > overhead,
6250 ("Association MTU (%u) too small for overhead (%u)",
6251 asoc->smallest_mtu, overhead));
6252 frag_point = asoc->smallest_mtu - overhead;
6253 KASSERT(frag_point % 4 == 0,
6254 ("frag_point (%u) not a multiple of 4", frag_point));
6255 /* Honor MAXSEG socket option. */
6256 if ((asoc->sctp_frag_point > 0) &&
6257 (asoc->sctp_frag_point < frag_point)) {
6258 frag_point = asoc->sctp_frag_point;
6260 return (frag_point);
6264 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6267 * We assume that the user wants PR_SCTP_TTL if the user provides a
6268 * positive lifetime but does not specify any PR_SCTP policy.
6270 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6271 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6272 } else if (sp->timetolive > 0) {
6273 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6274 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6278 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6279 case CHUNK_FLAGS_PR_SCTP_BUF:
6281 * Time to live is a priority stored in tv_sec when doing
6282 * the buffer drop thing.
6284 sp->ts.tv_sec = sp->timetolive;
6287 case CHUNK_FLAGS_PR_SCTP_TTL:
6291 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6292 tv.tv_sec = sp->timetolive / 1000;
6293 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6295 * TODO sctp_constants.h needs alternative time
6296 * macros when _KERNEL is undefined.
6298 timevaladd(&sp->ts, &tv);
6301 case CHUNK_FLAGS_PR_SCTP_RTX:
6303 * Time to live is a the number or retransmissions stored in
6306 sp->ts.tv_sec = sp->timetolive;
6310 SCTPDBG(SCTP_DEBUG_USRREQ1,
6311 "Unknown PR_SCTP policy %u.\n",
6312 PR_SCTP_POLICY(sp->sinfo_flags));
6318 sctp_msg_append(struct sctp_tcb *stcb,
6319 struct sctp_nets *net,
6321 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6325 struct sctp_stream_queue_pending *sp = NULL;
6326 struct sctp_stream_out *strm;
6329 * Given an mbuf chain, put it into the association send queue and
6330 * place it on the wheel
6332 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6333 /* Invalid stream number */
6334 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6338 if ((stcb->asoc.stream_locked) &&
6339 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6340 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6344 /* Now can we send this? */
6345 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6346 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6347 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6348 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6349 /* got data while shutting down */
6350 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6354 sctp_alloc_a_strmoq(stcb, sp);
6356 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6360 sp->sinfo_flags = srcv->sinfo_flags;
6361 sp->timetolive = srcv->sinfo_timetolive;
6362 sp->ppid = srcv->sinfo_ppid;
6363 sp->context = srcv->sinfo_context;
6365 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6367 atomic_add_int(&sp->net->ref_count, 1);
6371 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6372 sp->sid = srcv->sinfo_stream;
6373 sp->msg_is_complete = 1;
6374 sp->sender_all_done = 1;
6377 sp->tail_mbuf = NULL;
6378 sctp_set_prsctp_policy(sp);
6380 * We could in theory (for sendall) sifa the length in, but we would
6381 * still have to hunt through the chain since we need to setup the
6385 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6386 if (SCTP_BUF_NEXT(at) == NULL)
6388 sp->length += SCTP_BUF_LEN(at);
6390 if (srcv->sinfo_keynumber_valid) {
6391 sp->auth_keyid = srcv->sinfo_keynumber;
6393 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6395 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6396 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6397 sp->holds_key_ref = 1;
6399 if (hold_stcb_lock == 0) {
6400 SCTP_TCB_SEND_LOCK(stcb);
6402 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6403 sctp_snd_sb_alloc(stcb, sp->length);
6404 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6405 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6406 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp);
6408 if (hold_stcb_lock == 0) {
6409 SCTP_TCB_SEND_UNLOCK(stcb);
6418 static struct mbuf *
6419 sctp_copy_mbufchain(struct mbuf *clonechain,
6420 struct mbuf *outchain,
6421 struct mbuf **endofchain,
6424 uint8_t copy_by_ref)
6427 struct mbuf *appendchain;
6431 if (endofchain == NULL) {
6435 sctp_m_freem(outchain);
6438 if (can_take_mbuf) {
6439 appendchain = clonechain;
6442 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))) {
6443 /* Its not in a cluster */
6444 if (*endofchain == NULL) {
6445 /* lets get a mbuf cluster */
6446 if (outchain == NULL) {
6447 /* This is the general case */
6449 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6450 if (outchain == NULL) {
6453 SCTP_BUF_LEN(outchain) = 0;
6454 *endofchain = outchain;
6455 /* get the prepend space */
6456 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6459 * We really should not get a NULL
6465 if (SCTP_BUF_NEXT(m) == NULL) {
6469 m = SCTP_BUF_NEXT(m);
6472 if (*endofchain == NULL) {
6474 * huh, TSNH XXX maybe we
6477 sctp_m_freem(outchain);
6481 /* get the new end of length */
6482 len = (int)M_TRAILINGSPACE(*endofchain);
6484 /* how much is left at the end? */
6485 len = (int)M_TRAILINGSPACE(*endofchain);
6487 /* Find the end of the data, for appending */
6488 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6490 /* Now lets copy it out */
6491 if (len >= sizeofcpy) {
6492 /* It all fits, copy it in */
6493 m_copydata(clonechain, 0, sizeofcpy, cp);
6494 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6496 /* fill up the end of the chain */
6498 m_copydata(clonechain, 0, len, cp);
6499 SCTP_BUF_LEN((*endofchain)) += len;
6500 /* now we need another one */
6503 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6508 SCTP_BUF_NEXT((*endofchain)) = m;
6510 cp = mtod((*endofchain), caddr_t);
6511 m_copydata(clonechain, len, sizeofcpy, cp);
6512 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6516 /* copy the old fashion way */
6517 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6518 #ifdef SCTP_MBUF_LOGGING
6519 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6520 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6525 if (appendchain == NULL) {
6528 sctp_m_freem(outchain);
6532 /* tack on to the end */
6533 if (*endofchain != NULL) {
6534 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6538 if (SCTP_BUF_NEXT(m) == NULL) {
6539 SCTP_BUF_NEXT(m) = appendchain;
6542 m = SCTP_BUF_NEXT(m);
6546 * save off the end and update the end-chain position
6550 if (SCTP_BUF_NEXT(m) == NULL) {
6554 m = SCTP_BUF_NEXT(m);
6558 /* save off the end and update the end-chain position */
6561 if (SCTP_BUF_NEXT(m) == NULL) {
6565 m = SCTP_BUF_NEXT(m);
6567 return (appendchain);
6572 sctp_med_chunk_output(struct sctp_inpcb *inp,
6573 struct sctp_tcb *stcb,
6574 struct sctp_association *asoc,
6577 int control_only, int from_where,
6578 struct timeval *now, int *now_filled,
6579 uint32_t frag_point, int so_locked);
6582 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6583 uint32_t val SCTP_UNUSED)
6585 struct sctp_copy_all *ca;
6588 int added_control = 0;
6589 int un_sent, do_chunk_output = 1;
6590 struct sctp_association *asoc;
6591 struct sctp_nets *net;
6593 ca = (struct sctp_copy_all *)ptr;
6594 if (ca->m == NULL) {
6597 if (ca->inp != inp) {
6601 if (ca->sndlen > 0) {
6602 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6604 /* can't copy so we are done */
6608 #ifdef SCTP_MBUF_LOGGING
6609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6610 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6616 SCTP_TCB_LOCK_ASSERT(stcb);
6617 if (stcb->asoc.alternate) {
6618 net = stcb->asoc.alternate;
6620 net = stcb->asoc.primary_destination;
6622 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6623 /* Abort this assoc with m as the user defined reason */
6625 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6627 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6628 0, M_NOWAIT, 1, MT_DATA);
6629 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6632 struct sctp_paramhdr *ph;
6634 ph = mtod(m, struct sctp_paramhdr *);
6635 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6636 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6639 * We add one here to keep the assoc from dis-appearing on
6642 atomic_add_int(&stcb->asoc.refcnt, 1);
6643 sctp_abort_an_association(inp, stcb, m, false, SCTP_SO_NOT_LOCKED);
6645 * sctp_abort_an_association calls sctp_free_asoc() free
6646 * association will NOT free it since we incremented the
6647 * refcnt .. we do this to prevent it being freed and things
6648 * getting tricky since we could end up (from free_asoc)
6649 * calling inpcb_free which would get a recursive lock call
6650 * to the iterator lock.. But as a consequence of that the
6651 * stcb will return to us un-locked.. since free_asoc
6652 * returns with either no TCB or the TCB unlocked, we must
6653 * relock.. to unlock in the iterator timer :-0
6655 SCTP_TCB_LOCK(stcb);
6656 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6657 goto no_chunk_output;
6660 ret = sctp_msg_append(stcb, net, m,
6664 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6665 /* shutdown this assoc */
6666 if (TAILQ_EMPTY(&asoc->send_queue) &&
6667 TAILQ_EMPTY(&asoc->sent_queue) &&
6668 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6669 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6673 * there is nothing queued to send, so I'm
6676 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6677 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6678 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6680 * only send SHUTDOWN the first time
6683 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6684 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6686 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6687 sctp_stop_timers_for_shutdown(stcb);
6688 sctp_send_shutdown(stcb, net);
6689 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6691 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6694 do_chunk_output = 0;
6698 * we still got (or just got) data to send,
6699 * so set SHUTDOWN_PENDING
6702 * XXX sockets draft says that SCTP_EOF
6703 * should be sent with no data. currently,
6704 * we will allow user data to be sent first
6705 * and move to SHUTDOWN-PENDING
6707 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6708 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6709 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6710 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6711 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6713 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6714 if (TAILQ_EMPTY(&asoc->send_queue) &&
6715 TAILQ_EMPTY(&asoc->sent_queue) &&
6716 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6717 struct mbuf *op_err;
6718 char msg[SCTP_DIAG_INFO_LEN];
6721 SCTP_SNPRINTF(msg, sizeof(msg),
6722 "%s:%d at %s", __FILE__, __LINE__, __func__);
6723 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6725 atomic_add_int(&stcb->asoc.refcnt, 1);
6726 sctp_abort_an_association(stcb->sctp_ep, stcb,
6727 op_err, false, SCTP_SO_NOT_LOCKED);
6728 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6729 goto no_chunk_output;
6731 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6737 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6738 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6740 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6741 (stcb->asoc.total_flight > 0) &&
6742 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6743 do_chunk_output = 0;
6745 if (do_chunk_output)
6746 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6747 else if (added_control) {
6749 int num_out, reason, now_filled = 0;
6751 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6752 &reason, 1, 1, &now, &now_filled,
6753 sctp_get_frag_point(stcb),
6754 SCTP_SO_NOT_LOCKED);
6765 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6767 struct sctp_copy_all *ca;
6769 ca = (struct sctp_copy_all *)ptr;
6771 * Do a notify here? Kacheong suggests that the notify be done at
6772 * the send time.. so you would push up a notification if any send
6773 * failed. Don't know if this is feasible since the only failures we
6774 * have is "memory" related and if you cannot get an mbuf to send
6775 * the data you surely can't get an mbuf to send up to notify the
6776 * user you can't send the data :->
6779 /* now free everything */
6781 /* Lets clear the flag to allow others to run. */
6782 SCTP_INP_WLOCK(ca->inp);
6783 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6784 SCTP_INP_WUNLOCK(ca->inp);
6786 sctp_m_freem(ca->m);
6787 SCTP_FREE(ca, SCTP_M_COPYAL);
6790 static struct mbuf *
6791 sctp_copy_out_all(struct uio *uio, ssize_t len)
6793 struct mbuf *ret, *at;
6794 ssize_t left, willcpy, cancpy, error;
6796 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6802 SCTP_BUF_LEN(ret) = 0;
6803 /* save space for the data chunk header */
6804 cancpy = (int)M_TRAILINGSPACE(ret);
6805 willcpy = min(cancpy, left);
6808 /* Align data to the end */
6809 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6815 SCTP_BUF_LEN(at) = (int)willcpy;
6816 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6819 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6820 if (SCTP_BUF_NEXT(at) == NULL) {
6823 at = SCTP_BUF_NEXT(at);
6824 SCTP_BUF_LEN(at) = 0;
6825 cancpy = (int)M_TRAILINGSPACE(at);
6826 willcpy = min(cancpy, left);
6833 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6834 struct sctp_sndrcvinfo *srcv)
6837 struct sctp_copy_all *ca;
6839 if (uio->uio_resid > (ssize_t)SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
6840 /* You must not be larger than the limit! */
6843 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6850 memset(ca, 0, sizeof(struct sctp_copy_all));
6854 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6858 SCTP_INP_WLOCK(inp);
6859 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) != 0) {
6860 SCTP_INP_WUNLOCK(inp);
6862 SCTP_FREE(ca, SCTP_M_COPYAL);
6865 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6866 SCTP_INP_WUNLOCK(inp);
6869 * take off the sendall flag, it would be bad if we failed to do
6872 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6873 /* get length and mbuf chain */
6875 ca->sndlen = uio->uio_resid;
6876 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6877 if (ca->m == NULL) {
6878 SCTP_FREE(ca, SCTP_M_COPYAL);
6880 SCTP_INP_WLOCK(inp);
6881 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6882 SCTP_INP_WUNLOCK(inp);
6883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6887 /* Gather the length of the send */
6891 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6892 ca->sndlen += SCTP_BUF_LEN(mat);
6895 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6896 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6897 SCTP_ASOC_ANY_STATE,
6899 sctp_sendall_completes, inp, 1);
6901 SCTP_INP_WLOCK(inp);
6902 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6903 SCTP_INP_WUNLOCK(inp);
6904 SCTP_FREE(ca, SCTP_M_COPYAL);
6905 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6912 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6914 struct sctp_tmit_chunk *chk, *nchk;
6916 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6917 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6918 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6919 asoc->ctrl_queue_cnt--;
6921 sctp_m_freem(chk->data);
6924 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6930 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6932 struct sctp_association *asoc;
6933 struct sctp_tmit_chunk *chk, *nchk;
6934 struct sctp_asconf_chunk *acp;
6937 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6938 /* find SCTP_ASCONF chunk in queue */
6939 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6941 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6942 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6947 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6948 asoc->ctrl_queue_cnt--;
6950 sctp_m_freem(chk->data);
6953 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6959 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6960 struct sctp_association *asoc,
6961 struct sctp_tmit_chunk **data_list,
6963 struct sctp_nets *net)
6966 struct sctp_tmit_chunk *tp1;
6968 for (i = 0; i < bundle_at; i++) {
6969 /* off of the send queue */
6970 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6971 asoc->send_queue_cnt--;
6974 * Any chunk NOT 0 you zap the time chunk 0 gets
6975 * zapped or set based on if a RTO measurment is
6978 data_list[i]->do_rtt = 0;
6981 data_list[i]->sent_rcv_time = net->last_sent_time;
6982 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6983 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6984 if (data_list[i]->whoTo == NULL) {
6985 data_list[i]->whoTo = net;
6986 atomic_add_int(&net->ref_count, 1);
6988 /* on to the sent queue */
6989 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6990 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6991 struct sctp_tmit_chunk *tpp;
6993 /* need to move back */
6995 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6997 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7001 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7004 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7006 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7011 /* This does not lower until the cum-ack passes it */
7012 asoc->sent_queue_cnt++;
7013 if ((asoc->peers_rwnd <= 0) &&
7014 (asoc->total_flight == 0) &&
7016 /* Mark the chunk as being a window probe */
7017 SCTP_STAT_INCR(sctps_windowprobed);
7019 #ifdef SCTP_AUDITING_ENABLED
7020 sctp_audit_log(0xC2, 3);
7022 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7023 data_list[i]->snd_count = 1;
7024 data_list[i]->rec.data.chunk_was_revoked = 0;
7025 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7026 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7027 data_list[i]->whoTo->flight_size,
7028 data_list[i]->book_size,
7029 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7030 data_list[i]->rec.data.tsn);
7032 sctp_flight_size_increase(data_list[i]);
7033 sctp_total_flight_increase(stcb, data_list[i]);
7034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7035 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7036 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7038 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7039 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7040 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7041 /* SWS sender side engages */
7042 asoc->peers_rwnd = 0;
7045 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7046 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7051 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked)
7053 struct sctp_tmit_chunk *chk, *nchk;
7055 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7056 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7057 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7058 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7059 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7060 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7061 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7062 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7063 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7064 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7065 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7066 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7067 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7068 /* Stray chunks must be cleaned up */
7070 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7071 asoc->ctrl_queue_cnt--;
7073 sctp_m_freem(chk->data);
7076 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7077 asoc->fwd_tsn_cnt--;
7079 sctp_free_a_chunk(stcb, chk, so_locked);
7080 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7081 /* special handling, we must look into the param */
7082 if (chk != asoc->str_reset) {
7083 goto clean_up_anyway;
7090 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7091 uint32_t space_left, uint32_t frag_point, int eeor_on)
7094 * Make a decision on if I should split a msg into multiple parts.
7095 * This is only asked of incomplete messages.
7099 * If we are doing EEOR we need to always send it if its the
7100 * entire thing, since it might be all the guy is putting in
7103 if (space_left >= length) {
7105 * If we have data outstanding,
7106 * we get another chance when the sack
7107 * arrives to transmit - wait for more data
7109 if (stcb->asoc.total_flight == 0) {
7111 * If nothing is in flight, we zero the
7119 /* You can fill the rest */
7120 return (space_left);
7124 * For those strange folk that make the send buffer
7125 * smaller than our fragmentation point, we can't
7126 * get a full msg in so we have to allow splitting.
7128 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7131 if ((length <= space_left) ||
7132 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7133 /* Sub-optimial residual don't split in non-eeor mode. */
7137 * If we reach here length is larger than the space_left. Do we wish
7138 * to split it for the sake of packet putting together?
7140 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7141 /* Its ok to split it */
7142 return (min(space_left, frag_point));
7144 /* Nope, can't split */
7149 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7150 struct sctp_nets *net,
7151 struct sctp_stream_out *strq,
7152 uint32_t space_left,
7153 uint32_t frag_point,
7159 /* Move from the stream to the send_queue keeping track of the total */
7160 struct sctp_association *asoc;
7161 struct sctp_stream_queue_pending *sp;
7162 struct sctp_tmit_chunk *chk;
7163 struct sctp_data_chunk *dchkh = NULL;
7164 struct sctp_idata_chunk *ndchkh = NULL;
7165 uint32_t to_move, length;
7167 uint8_t rcv_flags = 0;
7169 uint8_t send_lock_up = 0;
7171 SCTP_TCB_LOCK_ASSERT(stcb);
7174 /* sa_ignore FREED_MEMORY */
7175 sp = TAILQ_FIRST(&strq->outqueue);
7177 if (send_lock_up == 0) {
7178 SCTP_TCB_SEND_LOCK(stcb);
7181 sp = TAILQ_FIRST(&strq->outqueue);
7185 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7186 (stcb->asoc.idata_supported == 0) &&
7187 (strq->last_msg_incomplete)) {
7188 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7190 strq->last_msg_incomplete);
7191 strq->last_msg_incomplete = 0;
7195 SCTP_TCB_SEND_UNLOCK(stcb);
7200 if ((sp->msg_is_complete) && (sp->length == 0)) {
7201 if (sp->sender_all_done) {
7203 * We are doing deferred cleanup. Last time through
7204 * when we took all the data the sender_all_done was
7207 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7210 sp->sender_all_done,
7212 sp->msg_is_complete,
7216 if (send_lock_up == 0) {
7217 SCTP_TCB_SEND_LOCK(stcb);
7220 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7221 TAILQ_REMOVE(&strq->outqueue, sp, next);
7222 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
7223 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7224 (strq->chunks_on_queues == 0) &&
7225 TAILQ_EMPTY(&strq->outqueue)) {
7226 stcb->asoc.trigger_reset = 1;
7229 sctp_free_remote_addr(sp->net);
7233 sctp_m_freem(sp->data);
7236 sctp_free_a_strmoq(stcb, sp, so_locked);
7237 /* we can't be locked to it */
7239 SCTP_TCB_SEND_UNLOCK(stcb);
7242 /* back to get the next msg */
7246 * sender just finished this but still holds a
7254 /* is there some to get */
7255 if (sp->length == 0) {
7260 } else if (sp->discard_rest) {
7261 if (send_lock_up == 0) {
7262 SCTP_TCB_SEND_LOCK(stcb);
7265 /* Whack down the size */
7266 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7267 if ((stcb->sctp_socket != NULL) &&
7268 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7269 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7270 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7273 sctp_m_freem(sp->data);
7275 sp->tail_mbuf = NULL;
7284 some_taken = sp->some_taken;
7286 length = sp->length;
7287 if (sp->msg_is_complete) {
7288 /* The message is complete */
7289 to_move = min(length, frag_point);
7290 if (to_move == length) {
7291 /* All of it fits in the MTU */
7292 if (sp->some_taken) {
7293 rcv_flags |= SCTP_DATA_LAST_FRAG;
7295 rcv_flags |= SCTP_DATA_NOT_FRAG;
7297 sp->put_last_out = 1;
7298 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7299 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7302 /* Not all of it fits, we fragment */
7303 if (sp->some_taken == 0) {
7304 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7309 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7312 * We use a snapshot of length in case it
7313 * is expanding during the compare.
7318 if (to_move >= llen) {
7320 if (send_lock_up == 0) {
7322 * We are taking all of an incomplete msg
7323 * thus we need a send lock.
7325 SCTP_TCB_SEND_LOCK(stcb);
7327 if (sp->msg_is_complete) {
7329 * the sender finished the
7336 if (sp->some_taken == 0) {
7337 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7341 /* Nothing to take. */
7348 /* If we reach here, we can copy out a chunk */
7349 sctp_alloc_a_chunk(stcb, chk);
7351 /* No chunk memory */
7357 * Setup for unordered if needed by looking at the user sent info
7360 if (sp->sinfo_flags & SCTP_UNORDERED) {
7361 rcv_flags |= SCTP_DATA_UNORDERED;
7363 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7364 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7365 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7367 /* clear out the chunk before setting up */
7368 memset(chk, 0, sizeof(*chk));
7369 chk->rec.data.rcv_flags = rcv_flags;
7371 if (to_move >= length) {
7372 /* we think we can steal the whole thing */
7373 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7374 SCTP_TCB_SEND_LOCK(stcb);
7377 if (to_move < sp->length) {
7378 /* bail, it changed */
7381 chk->data = sp->data;
7382 chk->last_mbuf = sp->tail_mbuf;
7383 /* register the stealing */
7384 sp->data = sp->tail_mbuf = NULL;
7389 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7390 chk->last_mbuf = NULL;
7391 if (chk->data == NULL) {
7392 sp->some_taken = some_taken;
7393 sctp_free_a_chunk(stcb, chk, so_locked);
7398 #ifdef SCTP_MBUF_LOGGING
7399 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7400 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7403 /* Pull off the data */
7404 m_adj(sp->data, to_move);
7405 /* Now lets work our way down and compact it */
7407 while (m && (SCTP_BUF_LEN(m) == 0)) {
7408 sp->data = SCTP_BUF_NEXT(m);
7409 SCTP_BUF_NEXT(m) = NULL;
7410 if (sp->tail_mbuf == m) {
7412 * Freeing tail? TSNH since
7413 * we supposedly were taking less
7414 * than the sp->length.
7417 panic("Huh, freing tail? - TSNH");
7419 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7420 sp->tail_mbuf = sp->data = NULL;
7428 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7429 chk->copy_by_ref = 1;
7431 chk->copy_by_ref = 0;
7434 * get last_mbuf and counts of mb usage This is ugly but hopefully
7435 * its only one mbuf.
7437 if (chk->last_mbuf == NULL) {
7438 chk->last_mbuf = chk->data;
7439 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7440 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7444 if (to_move > length) {
7445 /*- This should not happen either
7446 * since we always lower to_move to the size
7447 * of sp->length if its larger.
7450 panic("Huh, how can to_move be larger?");
7452 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7456 atomic_subtract_int(&sp->length, to_move);
7458 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7459 if (M_LEADINGSPACE(chk->data) < leading) {
7460 /* Not enough room for a chunk header, get some */
7463 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7466 * we're in trouble here. _PREPEND below will free
7467 * all the data if there is no leading space, so we
7468 * must put the data back and restore.
7470 if (send_lock_up == 0) {
7471 SCTP_TCB_SEND_LOCK(stcb);
7474 if (sp->data == NULL) {
7475 /* unsteal the data */
7476 sp->data = chk->data;
7477 sp->tail_mbuf = chk->last_mbuf;
7481 /* reassemble the data */
7483 sp->data = chk->data;
7484 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7486 sp->some_taken = some_taken;
7487 atomic_add_int(&sp->length, to_move);
7490 sctp_free_a_chunk(stcb, chk, so_locked);
7494 SCTP_BUF_LEN(m) = 0;
7495 SCTP_BUF_NEXT(m) = chk->data;
7497 M_ALIGN(chk->data, 4);
7500 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7501 if (chk->data == NULL) {
7502 /* HELP, TSNH since we assured it would not above? */
7504 panic("prepend failes HELP?");
7506 SCTP_PRINTF("prepend fails HELP?\n");
7507 sctp_free_a_chunk(stcb, chk, so_locked);
7513 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7514 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7515 chk->book_size_scale = 0;
7516 chk->sent = SCTP_DATAGRAM_UNSENT;
7519 chk->asoc = &stcb->asoc;
7520 chk->pad_inplace = 0;
7521 chk->no_fr_allowed = 0;
7522 if (stcb->asoc.idata_supported == 0) {
7523 if (rcv_flags & SCTP_DATA_UNORDERED) {
7524 /* Just use 0. The receiver ignores the values. */
7525 chk->rec.data.mid = 0;
7527 chk->rec.data.mid = strq->next_mid_ordered;
7528 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7529 strq->next_mid_ordered++;
7533 if (rcv_flags & SCTP_DATA_UNORDERED) {
7534 chk->rec.data.mid = strq->next_mid_unordered;
7535 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7536 strq->next_mid_unordered++;
7539 chk->rec.data.mid = strq->next_mid_ordered;
7540 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7541 strq->next_mid_ordered++;
7545 chk->rec.data.sid = sp->sid;
7546 chk->rec.data.ppid = sp->ppid;
7547 chk->rec.data.context = sp->context;
7548 chk->rec.data.doing_fast_retransmit = 0;
7550 chk->rec.data.timetodrop = sp->ts;
7551 chk->flags = sp->act_flags;
7554 chk->whoTo = sp->net;
7555 atomic_add_int(&chk->whoTo->ref_count, 1);
7559 if (sp->holds_key_ref) {
7560 chk->auth_keyid = sp->auth_keyid;
7561 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7562 chk->holds_key_ref = 1;
7564 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, to_move);
7565 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7566 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7567 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7568 (uint32_t)(uintptr_t)stcb, sp->length,
7569 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7572 if (stcb->asoc.idata_supported == 0) {
7573 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7575 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7578 * Put the rest of the things in place now. Size was done earlier in
7579 * previous loop prior to padding.
7582 #ifdef SCTP_ASOCLOG_OF_TSNS
7583 SCTP_TCB_LOCK_ASSERT(stcb);
7584 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7585 asoc->tsn_out_at = 0;
7586 asoc->tsn_out_wrapped = 1;
7588 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7589 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7590 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7591 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7592 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7593 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7594 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7595 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7598 if (stcb->asoc.idata_supported == 0) {
7599 dchkh->ch.chunk_type = SCTP_DATA;
7600 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7601 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7602 dchkh->dp.sid = htons(strq->sid);
7603 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7604 dchkh->dp.ppid = chk->rec.data.ppid;
7605 dchkh->ch.chunk_length = htons(chk->send_size);
7607 ndchkh->ch.chunk_type = SCTP_IDATA;
7608 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7609 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7610 ndchkh->dp.sid = htons(strq->sid);
7611 ndchkh->dp.reserved = htons(0);
7612 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7614 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7616 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7618 ndchkh->ch.chunk_length = htons(chk->send_size);
7620 /* Now advance the chk->send_size by the actual pad needed. */
7621 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7626 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7627 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7629 chk->last_mbuf = lm;
7630 chk->pad_inplace = 1;
7632 chk->send_size += pads;
7634 if (PR_SCTP_ENABLED(chk->flags)) {
7635 asoc->pr_sctp_cnt++;
7637 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7638 /* All done pull and kill the message */
7639 if (sp->put_last_out == 0) {
7640 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7641 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7642 sp->sender_all_done,
7644 sp->msg_is_complete,
7648 if (send_lock_up == 0) {
7649 SCTP_TCB_SEND_LOCK(stcb);
7652 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7653 TAILQ_REMOVE(&strq->outqueue, sp, next);
7654 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
7655 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7656 (strq->chunks_on_queues == 0) &&
7657 TAILQ_EMPTY(&strq->outqueue)) {
7658 stcb->asoc.trigger_reset = 1;
7661 sctp_free_remote_addr(sp->net);
7665 sctp_m_freem(sp->data);
7668 sctp_free_a_strmoq(stcb, sp, so_locked);
7670 asoc->chunks_on_out_queue++;
7671 strq->chunks_on_queues++;
7672 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7673 asoc->send_queue_cnt++;
7676 SCTP_TCB_SEND_UNLOCK(stcb);
7682 sctp_fill_outqueue(struct sctp_tcb *stcb, struct sctp_nets *net,
7683 uint32_t frag_point, int eeor_mode, int *quit_now,
7686 struct sctp_association *asoc;
7687 struct sctp_stream_out *strq;
7688 uint32_t space_left, moved, total_moved;
7691 SCTP_TCB_LOCK_ASSERT(stcb);
7694 switch (net->ro._l_addr.sa.sa_family) {
7697 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7702 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7707 space_left = net->mtu;
7710 /* Need an allowance for the data chunk header too */
7711 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7713 /* must make even word boundary */
7714 space_left &= 0xfffffffc;
7715 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7718 while ((space_left > 0) && (strq != NULL)) {
7719 moved = sctp_move_to_outqueue(stcb, net, strq, space_left,
7720 frag_point, &giveup, eeor_mode,
7722 if ((giveup != 0) || (bail != 0)) {
7725 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7726 total_moved += moved;
7727 if (space_left >= moved) {
7728 space_left -= moved;
7732 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7733 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7737 space_left &= 0xfffffffc;
7742 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7744 if (total_moved == 0) {
7745 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7746 (net == stcb->asoc.primary_destination)) {
7747 /* ran dry for primary network net */
7748 SCTP_STAT_INCR(sctps_primary_randry);
7749 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7750 /* ran dry with CMT on */
7751 SCTP_STAT_INCR(sctps_cmt_randry);
7757 sctp_fix_ecn_echo(struct sctp_association *asoc)
7759 struct sctp_tmit_chunk *chk;
7761 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7762 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7763 chk->sent = SCTP_DATAGRAM_UNSENT;
7769 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7771 struct sctp_association *asoc;
7772 struct sctp_tmit_chunk *chk;
7773 struct sctp_stream_queue_pending *sp;
7780 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7781 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7782 if (sp->net == net) {
7783 sctp_free_remote_addr(sp->net);
7788 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7789 if (chk->whoTo == net) {
7790 sctp_free_remote_addr(chk->whoTo);
7797 sctp_med_chunk_output(struct sctp_inpcb *inp,
7798 struct sctp_tcb *stcb,
7799 struct sctp_association *asoc,
7802 int control_only, int from_where,
7803 struct timeval *now, int *now_filled,
7804 uint32_t frag_point, int so_locked)
7807 * Ok this is the generic chunk service queue. we must do the
7809 * - Service the stream queue that is next, moving any
7810 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7811 * LAST to the out queue in one pass) and assigning TSN's. This
7812 * only applys though if the peer does not support NDATA. For NDATA
7813 * chunks its ok to not send the entire message ;-)
7814 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7815 * fomulate and send the low level chunks. Making sure to combine
7816 * any control in the control chunk queue also.
7818 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7819 struct mbuf *outchain, *endoutchain;
7820 struct sctp_tmit_chunk *chk, *nchk;
7822 /* temp arrays for unlinking */
7823 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7824 int no_fragmentflg, error;
7825 unsigned int max_rwnd_per_dest, max_send_per_dest;
7826 int one_chunk, hbflag, skip_data_for_this_net;
7827 int asconf, cookie, no_out_cnt;
7828 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7829 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7831 uint32_t auth_offset;
7832 struct sctp_auth_chunk *auth;
7833 uint16_t auth_keyid;
7834 int override_ok = 1;
7835 int skip_fill_up = 0;
7836 int data_auth_reqd = 0;
7839 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7846 auth_keyid = stcb->asoc.authinfo.active_keyid;
7847 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7848 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7849 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7854 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7856 * First lets prime the pump. For each destination, if there is room
7857 * in the flight size, attempt to pull an MTU's worth out of the
7858 * stream queues into the general send_queue
7860 #ifdef SCTP_AUDITING_ENABLED
7861 sctp_audit_log(0xC2, 2);
7863 SCTP_TCB_LOCK_ASSERT(stcb);
7870 /* Nothing to possible to send? */
7871 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7872 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7873 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7874 TAILQ_EMPTY(&asoc->send_queue) &&
7875 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7880 if (asoc->peers_rwnd == 0) {
7881 /* No room in peers rwnd */
7883 if (asoc->total_flight > 0) {
7884 /* we are allowed one chunk in flight */
7888 if (stcb->asoc.ecn_echo_cnt_onq) {
7889 /* Record where a sack goes, if any */
7890 if (no_data_chunks &&
7891 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7892 /* Nothing but ECNe to send - we don't do that */
7893 goto nothing_to_send;
7895 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7896 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7897 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7898 sack_goes_to = chk->whoTo;
7903 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7904 if (stcb->sctp_socket)
7905 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7907 max_send_per_dest = 0;
7908 if (no_data_chunks == 0) {
7909 /* How many non-directed chunks are there? */
7910 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7911 if (chk->whoTo == NULL) {
7913 * We already have non-directed chunks on
7914 * the queue, no need to do a fill-up.
7921 if ((no_data_chunks == 0) &&
7922 (skip_fill_up == 0) &&
7923 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7924 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7926 * This for loop we are in takes in each net, if
7927 * its's got space in cwnd and has data sent to it
7928 * (when CMT is off) then it calls
7929 * sctp_fill_outqueue for the net. This gets data on
7930 * the send queue for that network.
7932 * In sctp_fill_outqueue TSN's are assigned and data
7933 * is copied out of the stream buffers. Note mostly
7934 * copy by reference (we hope).
7936 net->window_probe = 0;
7937 if ((net != stcb->asoc.alternate) &&
7938 ((net->dest_state & SCTP_ADDR_PF) ||
7939 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7940 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7941 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7942 sctp_log_cwnd(stcb, net, 1,
7943 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7947 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7948 (net->flight_size == 0)) {
7949 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7951 if (net->flight_size >= net->cwnd) {
7952 /* skip this network, no room - can't fill */
7953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7954 sctp_log_cwnd(stcb, net, 3,
7955 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7959 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7960 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7962 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7964 /* memory alloc failure */
7970 /* now service each destination and send out what we can for it */
7971 /* Nothing to send? */
7972 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7973 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7974 TAILQ_EMPTY(&asoc->send_queue)) {
7979 if (asoc->sctp_cmt_on_off > 0) {
7980 /* get the last start point */
7981 start_at = asoc->last_net_cmt_send_started;
7982 if (start_at == NULL) {
7983 /* null so to beginning */
7984 start_at = TAILQ_FIRST(&asoc->nets);
7986 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7987 if (start_at == NULL) {
7988 start_at = TAILQ_FIRST(&asoc->nets);
7991 asoc->last_net_cmt_send_started = start_at;
7993 start_at = TAILQ_FIRST(&asoc->nets);
7995 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7996 if (chk->whoTo == NULL) {
7997 if (asoc->alternate) {
7998 chk->whoTo = asoc->alternate;
8000 chk->whoTo = asoc->primary_destination;
8002 atomic_add_int(&chk->whoTo->ref_count, 1);
8005 old_start_at = NULL;
8006 again_one_more_time:
8007 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8008 /* how much can we send? */
8009 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8010 if (old_start_at && (old_start_at == net)) {
8011 /* through list ocmpletely. */
8015 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8016 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8017 (net->flight_size >= net->cwnd)) {
8019 * Nothing on control or asconf and flight is full,
8020 * we can skip even in the CMT case.
8025 endoutchain = outchain = NULL;
8030 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8031 skip_data_for_this_net = 1;
8033 skip_data_for_this_net = 0;
8035 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8038 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8043 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8053 if (mtu > asoc->peers_rwnd) {
8054 if (asoc->total_flight > 0) {
8055 /* We have a packet in flight somewhere */
8056 r_mtu = asoc->peers_rwnd;
8058 /* We are always allowed to send one MTU out */
8066 /************************/
8067 /* ASCONF transmission */
8068 /************************/
8069 /* Now first lets go through the asconf queue */
8070 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8071 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8074 if (chk->whoTo == NULL) {
8075 if (asoc->alternate == NULL) {
8076 if (asoc->primary_destination != net) {
8080 if (asoc->alternate != net) {
8085 if (chk->whoTo != net) {
8089 if (chk->data == NULL) {
8092 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8093 chk->sent != SCTP_DATAGRAM_RESEND) {
8097 * if no AUTH is yet included and this chunk
8098 * requires it, make sure to account for it. We
8099 * don't apply the size until the AUTH chunk is
8100 * actually added below in case there is no room for
8101 * this chunk. NOTE: we overload the use of "omtu"
8104 if ((auth == NULL) &&
8105 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8106 stcb->asoc.peer_auth_chunks)) {
8107 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8110 /* Here we do NOT factor the r_mtu */
8111 if ((chk->send_size < (int)(mtu - omtu)) ||
8112 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8114 * We probably should glom the mbuf chain
8115 * from the chk->data for control but the
8116 * problem is it becomes yet one more level
8117 * of tracking to do if for some reason
8118 * output fails. Then I have got to
8119 * reconstruct the merged control chain.. el
8120 * yucko.. for now we take the easy way and
8124 * Add an AUTH chunk, if chunk requires it
8125 * save the offset into the chain for AUTH
8127 if ((auth == NULL) &&
8128 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8129 stcb->asoc.peer_auth_chunks))) {
8130 outchain = sctp_add_auth_chunk(outchain,
8135 chk->rec.chunk_id.id);
8136 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8138 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8139 (int)chk->rec.chunk_id.can_take_data,
8140 chk->send_size, chk->copy_by_ref);
8141 if (outchain == NULL) {
8143 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8146 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8147 /* update our MTU size */
8148 if (mtu > (chk->send_size + omtu))
8149 mtu -= (chk->send_size + omtu);
8152 to_out += (chk->send_size + omtu);
8153 /* Do clear IP_DF ? */
8154 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8157 if (chk->rec.chunk_id.can_take_data)
8160 * set hb flag since we can use these for
8166 * should sysctl this: don't bundle data
8167 * with ASCONF since it requires AUTH
8170 chk->sent = SCTP_DATAGRAM_SENT;
8171 if (chk->whoTo == NULL) {
8173 atomic_add_int(&net->ref_count, 1);
8178 * Ok we are out of room but we can
8179 * output without effecting the
8180 * flight size since this little guy
8181 * is a control only packet.
8183 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8185 * do NOT clear the asconf flag as
8186 * it is used to do appropriate
8187 * source address selection.
8189 if (*now_filled == 0) {
8190 (void)SCTP_GETTIME_TIMEVAL(now);
8193 net->last_sent_time = *now;
8195 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8196 (struct sockaddr *)&net->ro._l_addr,
8197 outchain, auth_offset, auth,
8198 stcb->asoc.authinfo.active_keyid,
8199 no_fragmentflg, 0, asconf,
8200 inp->sctp_lport, stcb->rport,
8201 htonl(stcb->asoc.peer_vtag),
8206 * error, we could not
8209 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8210 if (from_where == 0) {
8211 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8213 if (error == ENOBUFS) {
8214 asoc->ifp_had_enobuf = 1;
8215 SCTP_STAT_INCR(sctps_lowlevelerr);
8217 /* error, could not output */
8218 if (error == EHOSTUNREACH) {
8224 sctp_move_chunks_from_net(stcb, net);
8229 asoc->ifp_had_enobuf = 0;
8232 * increase the number we sent, if a
8233 * cookie is sent we don't tell them
8236 outchain = endoutchain = NULL;
8240 *num_out += ctl_cnt;
8241 /* recalc a clean slate and setup */
8242 switch (net->ro._l_addr.sa.sa_family) {
8245 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8250 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8267 /************************/
8268 /* Control transmission */
8269 /************************/
8270 /* Now first lets go through the control queue */
8271 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8272 if ((sack_goes_to) &&
8273 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8274 (chk->whoTo != sack_goes_to)) {
8276 * if we have a sack in queue, and we are
8277 * looking at an ecn echo that is NOT queued
8278 * to where the sack is going..
8280 if (chk->whoTo == net) {
8282 * Don't transmit it to where its
8283 * going (current net)
8286 } else if (sack_goes_to == net) {
8288 * But do transmit it to this
8291 goto skip_net_check;
8294 if (chk->whoTo == NULL) {
8295 if (asoc->alternate == NULL) {
8296 if (asoc->primary_destination != net) {
8300 if (asoc->alternate != net) {
8305 if (chk->whoTo != net) {
8310 if (chk->data == NULL) {
8313 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8315 * It must be unsent. Cookies and ASCONF's
8316 * hang around but there timers will force
8317 * when marked for resend.
8322 * if no AUTH is yet included and this chunk
8323 * requires it, make sure to account for it. We
8324 * don't apply the size until the AUTH chunk is
8325 * actually added below in case there is no room for
8326 * this chunk. NOTE: we overload the use of "omtu"
8329 if ((auth == NULL) &&
8330 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8331 stcb->asoc.peer_auth_chunks)) {
8332 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8335 /* Here we do NOT factor the r_mtu */
8336 if ((chk->send_size <= (int)(mtu - omtu)) ||
8337 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8339 * We probably should glom the mbuf chain
8340 * from the chk->data for control but the
8341 * problem is it becomes yet one more level
8342 * of tracking to do if for some reason
8343 * output fails. Then I have got to
8344 * reconstruct the merged control chain.. el
8345 * yucko.. for now we take the easy way and
8349 * Add an AUTH chunk, if chunk requires it
8350 * save the offset into the chain for AUTH
8352 if ((auth == NULL) &&
8353 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8354 stcb->asoc.peer_auth_chunks))) {
8355 outchain = sctp_add_auth_chunk(outchain,
8360 chk->rec.chunk_id.id);
8361 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8363 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8364 (int)chk->rec.chunk_id.can_take_data,
8365 chk->send_size, chk->copy_by_ref);
8366 if (outchain == NULL) {
8368 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8371 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8372 /* update our MTU size */
8373 if (mtu > (chk->send_size + omtu))
8374 mtu -= (chk->send_size + omtu);
8377 to_out += (chk->send_size + omtu);
8378 /* Do clear IP_DF ? */
8379 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8382 if (chk->rec.chunk_id.can_take_data)
8384 /* Mark things to be removed, if needed */
8385 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8386 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8387 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8388 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8389 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8390 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8391 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8392 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8393 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8394 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8395 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8396 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8399 /* remove these chunks at the end */
8400 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8401 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8402 /* turn off the timer */
8403 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8404 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8406 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8412 * Other chunks, since they have
8413 * timers running (i.e. COOKIE) we
8414 * just "trust" that it gets sent or
8418 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8421 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8423 * Increment ecne send count
8424 * here this means we may be
8425 * over-zealous in our
8426 * counting if the send
8427 * fails, but its the best
8428 * place to do it (we used
8429 * to do it in the queue of
8430 * the chunk, but that did
8431 * not tell how many times
8434 SCTP_STAT_INCR(sctps_sendecne);
8436 chk->sent = SCTP_DATAGRAM_SENT;
8437 if (chk->whoTo == NULL) {
8439 atomic_add_int(&net->ref_count, 1);
8445 * Ok we are out of room but we can
8446 * output without effecting the
8447 * flight size since this little guy
8448 * is a control only packet.
8451 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8453 * do NOT clear the asconf
8454 * flag as it is used to do
8455 * appropriate source
8456 * address selection.
8460 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8463 /* Only HB or ASCONF advances time */
8465 if (*now_filled == 0) {
8466 (void)SCTP_GETTIME_TIMEVAL(now);
8469 net->last_sent_time = *now;
8472 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8473 (struct sockaddr *)&net->ro._l_addr,
8476 stcb->asoc.authinfo.active_keyid,
8477 no_fragmentflg, 0, asconf,
8478 inp->sctp_lport, stcb->rport,
8479 htonl(stcb->asoc.peer_vtag),
8484 * error, we could not
8487 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8488 if (from_where == 0) {
8489 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8491 if (error == ENOBUFS) {
8492 asoc->ifp_had_enobuf = 1;
8493 SCTP_STAT_INCR(sctps_lowlevelerr);
8495 if (error == EHOSTUNREACH) {
8501 sctp_move_chunks_from_net(stcb, net);
8506 asoc->ifp_had_enobuf = 0;
8509 * increase the number we sent, if a
8510 * cookie is sent we don't tell them
8513 outchain = endoutchain = NULL;
8517 *num_out += ctl_cnt;
8518 /* recalc a clean slate and setup */
8519 switch (net->ro._l_addr.sa.sa_family) {
8522 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8527 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8544 /* JRI: if dest is in PF state, do not send data to it */
8545 if ((asoc->sctp_cmt_on_off > 0) &&
8546 (net != stcb->asoc.alternate) &&
8547 (net->dest_state & SCTP_ADDR_PF)) {
8550 if (net->flight_size >= net->cwnd) {
8553 if ((asoc->sctp_cmt_on_off > 0) &&
8554 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8555 (net->flight_size > max_rwnd_per_dest)) {
8559 * We need a specific accounting for the usage of the send
8560 * buffer. We also need to check the number of messages per
8561 * net. For now, this is better than nothing and it disabled
8564 if ((asoc->sctp_cmt_on_off > 0) &&
8565 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8566 (max_send_per_dest > 0) &&
8567 (net->flight_size > max_send_per_dest)) {
8570 /*********************/
8571 /* Data transmission */
8572 /*********************/
8574 * if AUTH for DATA is required and no AUTH has been added
8575 * yet, account for this in the mtu now... if no data can be
8576 * bundled, this adjustment won't matter anyways since the
8577 * packet will be going out...
8579 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8580 stcb->asoc.peer_auth_chunks);
8581 if (data_auth_reqd && (auth == NULL)) {
8582 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8584 /* now lets add any data within the MTU constraints */
8585 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8588 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8589 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8596 if (net->mtu > SCTP_MIN_OVERHEAD)
8597 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8607 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8608 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8609 (skip_data_for_this_net == 0)) ||
8611 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8612 if (no_data_chunks) {
8613 /* let only control go out */
8617 if (net->flight_size >= net->cwnd) {
8618 /* skip this net, no room for data */
8622 if ((chk->whoTo != NULL) &&
8623 (chk->whoTo != net)) {
8624 /* Don't send the chunk on this net */
8628 if (asoc->sctp_cmt_on_off == 0) {
8629 if ((asoc->alternate) &&
8630 (asoc->alternate != net) &&
8631 (chk->whoTo == NULL)) {
8633 } else if ((net != asoc->primary_destination) &&
8634 (asoc->alternate == NULL) &&
8635 (chk->whoTo == NULL)) {
8639 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8641 * strange, we have a chunk that is
8642 * to big for its destination and
8643 * yet no fragment ok flag.
8644 * Something went wrong when the
8645 * PMTU changed...we did not mark
8646 * this chunk for some reason?? I
8647 * will fix it here by letting IP
8648 * fragment it for now and printing
8649 * a warning. This really should not
8652 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8653 chk->send_size, mtu);
8654 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8656 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8657 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8658 struct sctp_data_chunk *dchkh;
8660 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8661 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8663 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8664 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8665 /* ok we will add this one */
8668 * Add an AUTH chunk, if chunk
8669 * requires it, save the offset into
8670 * the chain for AUTH
8672 if (data_auth_reqd) {
8674 outchain = sctp_add_auth_chunk(outchain,
8680 auth_keyid = chk->auth_keyid;
8682 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8683 } else if (override_ok) {
8688 auth_keyid = chk->auth_keyid;
8690 } else if (auth_keyid != chk->auth_keyid) {
8698 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8699 chk->send_size, chk->copy_by_ref);
8700 if (outchain == NULL) {
8701 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8702 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8703 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8706 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8709 /* upate our MTU size */
8710 /* Do clear IP_DF ? */
8711 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8714 /* unsigned subtraction of mtu */
8715 if (mtu > chk->send_size)
8716 mtu -= chk->send_size;
8719 /* unsigned subtraction of r_mtu */
8720 if (r_mtu > chk->send_size)
8721 r_mtu -= chk->send_size;
8725 to_out += chk->send_size;
8726 if ((to_out > mx_mtu) && no_fragmentflg) {
8728 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8730 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8734 chk->window_probe = 0;
8735 data_list[bundle_at++] = chk;
8736 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8739 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8740 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8741 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8743 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8745 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8746 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8756 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8758 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8759 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8760 data_list[0]->window_probe = 1;
8761 net->window_probe = 1;
8767 * Must be sent in order of the
8768 * TSN's (on a network)
8772 } /* for (chunk gather loop for this net) */
8773 } /* if asoc.state OPEN */
8775 /* Is there something to send for this destination? */
8777 /* We may need to start a control timer or two */
8779 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8782 * do NOT clear the asconf flag as it is
8783 * used to do appropriate source address
8788 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8791 /* must start a send timer if data is being sent */
8792 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8794 * no timer running on this destination
8797 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8799 if (bundle_at || hbflag) {
8800 /* For data/asconf and hb set time */
8801 if (*now_filled == 0) {
8802 (void)SCTP_GETTIME_TIMEVAL(now);
8805 net->last_sent_time = *now;
8807 /* Now send it, if there is anything to send :> */
8808 if ((error = sctp_lowlevel_chunk_output(inp,
8811 (struct sockaddr *)&net->ro._l_addr,
8819 inp->sctp_lport, stcb->rport,
8820 htonl(stcb->asoc.peer_vtag),
8824 /* error, we could not output */
8825 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8826 if (from_where == 0) {
8827 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8829 if (error == ENOBUFS) {
8830 asoc->ifp_had_enobuf = 1;
8831 SCTP_STAT_INCR(sctps_lowlevelerr);
8833 if (error == EHOSTUNREACH) {
8835 * Destination went unreachable
8838 sctp_move_chunks_from_net(stcb, net);
8842 * I add this line to be paranoid. As far as
8843 * I can tell the continue, takes us back to
8844 * the top of the for, but just to make sure
8845 * I will reset these again here.
8848 continue; /* This takes us back to the
8849 * for() for the nets. */
8851 asoc->ifp_had_enobuf = 0;
8857 *num_out += (ctl_cnt + bundle_at);
8860 /* setup for a RTO measurement */
8861 tsns_sent = data_list[0]->rec.data.tsn;
8862 /* fill time if not already filled */
8863 if (*now_filled == 0) {
8864 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8866 *now = asoc->time_last_sent;
8868 asoc->time_last_sent = *now;
8870 if (net->rto_needed) {
8871 data_list[0]->do_rtt = 1;
8872 net->rto_needed = 0;
8874 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8875 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8881 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8882 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8885 if (old_start_at == NULL) {
8886 old_start_at = start_at;
8887 start_at = TAILQ_FIRST(&asoc->nets);
8889 goto again_one_more_time;
8893 * At the end there should be no NON timed chunks hanging on this
8896 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8897 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8899 if ((*num_out == 0) && (*reason_code == 0)) {
8904 sctp_clean_up_ctl(stcb, asoc, so_locked);
8909 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8912 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8913 * the control chunk queue.
8915 struct sctp_chunkhdr *hdr;
8916 struct sctp_tmit_chunk *chk;
8917 struct mbuf *mat, *last_mbuf;
8918 uint32_t chunk_length;
8919 uint16_t padding_length;
8921 SCTP_TCB_LOCK_ASSERT(stcb);
8922 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8923 if (op_err == NULL) {
8928 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8929 chunk_length += SCTP_BUF_LEN(mat);
8930 if (SCTP_BUF_NEXT(mat) == NULL) {
8934 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8935 sctp_m_freem(op_err);
8938 padding_length = chunk_length % 4;
8939 if (padding_length != 0) {
8940 padding_length = 4 - padding_length;
8942 if (padding_length != 0) {
8943 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8944 sctp_m_freem(op_err);
8948 sctp_alloc_a_chunk(stcb, chk);
8951 sctp_m_freem(op_err);
8954 chk->copy_by_ref = 0;
8955 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8956 chk->rec.chunk_id.can_take_data = 0;
8958 chk->send_size = (uint16_t)chunk_length;
8959 chk->sent = SCTP_DATAGRAM_UNSENT;
8961 chk->asoc = &stcb->asoc;
8964 hdr = mtod(op_err, struct sctp_chunkhdr *);
8965 hdr->chunk_type = SCTP_OPERATION_ERROR;
8966 hdr->chunk_flags = 0;
8967 hdr->chunk_length = htons(chk->send_size);
8968 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8969 chk->asoc->ctrl_queue_cnt++;
8973 sctp_send_cookie_echo(struct mbuf *m,
8974 int offset, int limit,
8975 struct sctp_tcb *stcb,
8976 struct sctp_nets *net)
8979 * pull out the cookie and put it at the front of the control chunk
8983 struct mbuf *cookie;
8984 struct sctp_paramhdr param, *phdr;
8985 struct sctp_chunkhdr *hdr;
8986 struct sctp_tmit_chunk *chk;
8987 uint16_t ptype, plen;
8989 SCTP_TCB_LOCK_ASSERT(stcb);
8990 /* First find the cookie in the param area */
8992 at = offset + sizeof(struct sctp_init_chunk);
8994 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8998 ptype = ntohs(phdr->param_type);
8999 plen = ntohs(phdr->param_length);
9000 if (plen < sizeof(struct sctp_paramhdr)) {
9003 if (ptype == SCTP_STATE_COOKIE) {
9006 /* found the cookie */
9007 if (at + plen > limit) {
9010 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9011 if (cookie == NULL) {
9015 if ((pad = (plen % 4)) > 0) {
9019 if (sctp_pad_lastmbuf(cookie, pad, NULL) == NULL) {
9023 #ifdef SCTP_MBUF_LOGGING
9024 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9025 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9030 at += SCTP_SIZE32(plen);
9032 /* ok, we got the cookie lets change it into a cookie echo chunk */
9033 /* first the change from param to cookie */
9034 hdr = mtod(cookie, struct sctp_chunkhdr *);
9035 hdr->chunk_type = SCTP_COOKIE_ECHO;
9036 hdr->chunk_flags = 0;
9037 /* get the chunk stuff now and place it in the FRONT of the queue */
9038 sctp_alloc_a_chunk(stcb, chk);
9041 sctp_m_freem(cookie);
9044 chk->copy_by_ref = 0;
9045 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9046 chk->rec.chunk_id.can_take_data = 0;
9047 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9048 chk->send_size = SCTP_SIZE32(plen);
9049 chk->sent = SCTP_DATAGRAM_UNSENT;
9051 chk->asoc = &stcb->asoc;
9054 atomic_add_int(&chk->whoTo->ref_count, 1);
9055 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9056 chk->asoc->ctrl_queue_cnt++;
9061 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9065 struct sctp_nets *net)
9068 * take a HB request and make it into a HB ack and send it.
9070 struct mbuf *outchain;
9071 struct sctp_chunkhdr *chdr;
9072 struct sctp_tmit_chunk *chk;
9075 /* must have a net pointer */
9078 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9079 if (outchain == NULL) {
9080 /* gak out of memory */
9083 #ifdef SCTP_MBUF_LOGGING
9084 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9085 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9088 chdr = mtod(outchain, struct sctp_chunkhdr *);
9089 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9090 chdr->chunk_flags = 0;
9091 if (chk_length % 4 != 0) {
9092 sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
9094 sctp_alloc_a_chunk(stcb, chk);
9097 sctp_m_freem(outchain);
9100 chk->copy_by_ref = 0;
9101 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9102 chk->rec.chunk_id.can_take_data = 1;
9104 chk->send_size = chk_length;
9105 chk->sent = SCTP_DATAGRAM_UNSENT;
9107 chk->asoc = &stcb->asoc;
9108 chk->data = outchain;
9110 atomic_add_int(&chk->whoTo->ref_count, 1);
9111 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9112 chk->asoc->ctrl_queue_cnt++;
9116 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9118 /* formulate and queue a cookie-ack back to sender */
9119 struct mbuf *cookie_ack;
9120 struct sctp_chunkhdr *hdr;
9121 struct sctp_tmit_chunk *chk;
9123 SCTP_TCB_LOCK_ASSERT(stcb);
9125 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9126 if (cookie_ack == NULL) {
9130 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9131 sctp_alloc_a_chunk(stcb, chk);
9134 sctp_m_freem(cookie_ack);
9137 chk->copy_by_ref = 0;
9138 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9139 chk->rec.chunk_id.can_take_data = 1;
9141 chk->send_size = sizeof(struct sctp_chunkhdr);
9142 chk->sent = SCTP_DATAGRAM_UNSENT;
9144 chk->asoc = &stcb->asoc;
9145 chk->data = cookie_ack;
9146 if (chk->asoc->last_control_chunk_from != NULL) {
9147 chk->whoTo = chk->asoc->last_control_chunk_from;
9148 atomic_add_int(&chk->whoTo->ref_count, 1);
9152 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9153 hdr->chunk_type = SCTP_COOKIE_ACK;
9154 hdr->chunk_flags = 0;
9155 hdr->chunk_length = htons(chk->send_size);
9156 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9157 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9158 chk->asoc->ctrl_queue_cnt++;
9163 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9165 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9166 struct mbuf *m_shutdown_ack;
9167 struct sctp_shutdown_ack_chunk *ack_cp;
9168 struct sctp_tmit_chunk *chk;
9170 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9171 if (m_shutdown_ack == NULL) {
9175 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9176 sctp_alloc_a_chunk(stcb, chk);
9179 sctp_m_freem(m_shutdown_ack);
9182 chk->copy_by_ref = 0;
9183 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9184 chk->rec.chunk_id.can_take_data = 1;
9186 chk->send_size = sizeof(struct sctp_chunkhdr);
9187 chk->sent = SCTP_DATAGRAM_UNSENT;
9189 chk->asoc = &stcb->asoc;
9190 chk->data = m_shutdown_ack;
9193 atomic_add_int(&chk->whoTo->ref_count, 1);
9195 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9196 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9197 ack_cp->ch.chunk_flags = 0;
9198 ack_cp->ch.chunk_length = htons(chk->send_size);
9199 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9200 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9201 chk->asoc->ctrl_queue_cnt++;
9206 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9208 /* formulate and queue a SHUTDOWN to the sender */
9209 struct mbuf *m_shutdown;
9210 struct sctp_shutdown_chunk *shutdown_cp;
9211 struct sctp_tmit_chunk *chk;
9213 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9214 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9215 /* We already have a SHUTDOWN queued. Reuse it. */
9217 sctp_free_remote_addr(chk->whoTo);
9224 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9225 if (m_shutdown == NULL) {
9229 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9230 sctp_alloc_a_chunk(stcb, chk);
9233 sctp_m_freem(m_shutdown);
9236 chk->copy_by_ref = 0;
9237 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9238 chk->rec.chunk_id.can_take_data = 1;
9240 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9241 chk->sent = SCTP_DATAGRAM_UNSENT;
9243 chk->asoc = &stcb->asoc;
9244 chk->data = m_shutdown;
9247 atomic_add_int(&chk->whoTo->ref_count, 1);
9249 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9250 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9251 shutdown_cp->ch.chunk_flags = 0;
9252 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9253 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9254 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9255 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9256 chk->asoc->ctrl_queue_cnt++;
9258 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9261 atomic_add_int(&chk->whoTo->ref_count, 1);
9263 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9264 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9265 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9271 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9274 * formulate and queue an ASCONF to the peer. ASCONF parameters
9275 * should be queued on the assoc queue.
9277 struct sctp_tmit_chunk *chk;
9278 struct mbuf *m_asconf;
9281 SCTP_TCB_LOCK_ASSERT(stcb);
9283 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9284 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9285 /* can't send a new one if there is one in flight already */
9289 /* compose an ASCONF chunk, maximum length is PMTU */
9290 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9291 if (m_asconf == NULL) {
9295 sctp_alloc_a_chunk(stcb, chk);
9298 sctp_m_freem(m_asconf);
9302 chk->copy_by_ref = 0;
9303 chk->rec.chunk_id.id = SCTP_ASCONF;
9304 chk->rec.chunk_id.can_take_data = 0;
9305 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9306 chk->data = m_asconf;
9307 chk->send_size = len;
9308 chk->sent = SCTP_DATAGRAM_UNSENT;
9310 chk->asoc = &stcb->asoc;
9313 atomic_add_int(&chk->whoTo->ref_count, 1);
9315 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9316 chk->asoc->ctrl_queue_cnt++;
9321 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9324 * formulate and queue a asconf-ack back to sender. the asconf-ack
9325 * must be stored in the tcb.
9327 struct sctp_tmit_chunk *chk;
9328 struct sctp_asconf_ack *ack, *latest_ack;
9330 struct sctp_nets *net = NULL;
9332 SCTP_TCB_LOCK_ASSERT(stcb);
9333 /* Get the latest ASCONF-ACK */
9334 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9335 if (latest_ack == NULL) {
9338 if (latest_ack->last_sent_to != NULL &&
9339 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9340 /* we're doing a retransmission */
9341 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9344 if (stcb->asoc.last_control_chunk_from == NULL) {
9345 if (stcb->asoc.alternate) {
9346 net = stcb->asoc.alternate;
9348 net = stcb->asoc.primary_destination;
9351 net = stcb->asoc.last_control_chunk_from;
9356 if (stcb->asoc.last_control_chunk_from == NULL) {
9357 if (stcb->asoc.alternate) {
9358 net = stcb->asoc.alternate;
9360 net = stcb->asoc.primary_destination;
9363 net = stcb->asoc.last_control_chunk_from;
9366 latest_ack->last_sent_to = net;
9368 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9369 if (ack->data == NULL) {
9373 /* copy the asconf_ack */
9374 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9375 if (m_ack == NULL) {
9376 /* couldn't copy it */
9379 #ifdef SCTP_MBUF_LOGGING
9380 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9381 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9385 sctp_alloc_a_chunk(stcb, chk);
9389 sctp_m_freem(m_ack);
9392 chk->copy_by_ref = 0;
9393 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9394 chk->rec.chunk_id.can_take_data = 1;
9395 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9398 atomic_add_int(&chk->whoTo->ref_count, 1);
9401 chk->send_size = ack->len;
9402 chk->sent = SCTP_DATAGRAM_UNSENT;
9404 chk->asoc = &stcb->asoc;
9406 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9407 chk->asoc->ctrl_queue_cnt++;
9413 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9414 struct sctp_tcb *stcb,
9415 struct sctp_association *asoc,
9416 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked)
9419 * send out one MTU of retransmission. If fast_retransmit is
9420 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9421 * rwnd. For a Cookie or Asconf in the control chunk queue we
9422 * retransmit them by themselves.
9424 * For data chunks we will pick out the lowest TSN's in the sent_queue
9425 * marked for resend and bundle them all together (up to a MTU of
9426 * destination). The address to send to should have been
9427 * selected/changed where the retransmission was marked (i.e. in FR
9428 * or t3-timeout routines).
9430 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9431 struct sctp_tmit_chunk *chk, *fwd;
9432 struct mbuf *m, *endofchain;
9433 struct sctp_nets *net = NULL;
9434 uint32_t tsns_sent = 0;
9435 int no_fragmentflg, bundle_at, cnt_thru;
9437 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9438 struct sctp_auth_chunk *auth = NULL;
9439 uint32_t auth_offset = 0;
9440 uint16_t auth_keyid;
9441 int override_ok = 1;
9442 int data_auth_reqd = 0;
9445 SCTP_TCB_LOCK_ASSERT(stcb);
9446 tmr_started = ctl_cnt = 0;
9451 endofchain = m = NULL;
9452 auth_keyid = stcb->asoc.authinfo.active_keyid;
9453 #ifdef SCTP_AUDITING_ENABLED
9454 sctp_audit_log(0xC3, 1);
9456 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9457 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9458 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9459 asoc->sent_queue_retran_cnt);
9460 asoc->sent_queue_cnt = 0;
9461 asoc->sent_queue_cnt_removeable = 0;
9462 /* send back 0/0 so we enter normal transmission */
9466 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9467 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9468 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9469 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9470 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9473 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9474 if (chk != asoc->str_reset) {
9476 * not eligible for retran if its
9483 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9487 * Add an AUTH chunk, if chunk requires it save the
9488 * offset into the chain for AUTH
9490 if ((auth == NULL) &&
9491 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9492 stcb->asoc.peer_auth_chunks))) {
9493 m = sctp_add_auth_chunk(m, &endofchain,
9494 &auth, &auth_offset,
9496 chk->rec.chunk_id.id);
9497 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9499 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9505 /* do we have control chunks to retransmit? */
9507 /* Start a timer no matter if we succeed or fail */
9508 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9509 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9510 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9511 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9512 chk->snd_count++; /* update our count */
9513 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9514 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9515 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9516 no_fragmentflg, 0, 0,
9517 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9518 chk->whoTo->port, NULL,
9521 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9522 if (error == ENOBUFS) {
9523 asoc->ifp_had_enobuf = 1;
9524 SCTP_STAT_INCR(sctps_lowlevelerr);
9528 asoc->ifp_had_enobuf = 0;
9534 * We don't want to mark the net->sent time here since this
9535 * we use this for HB and retrans cannot measure RTT
9537 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9539 chk->sent = SCTP_DATAGRAM_SENT;
9540 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9544 /* Clean up the fwd-tsn list */
9545 sctp_clean_up_ctl(stcb, asoc, so_locked);
9550 * Ok, it is just data retransmission we need to do or that and a
9551 * fwd-tsn with it all.
9553 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9554 return (SCTP_RETRAN_DONE);
9556 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9557 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9558 /* not yet open, resend the cookie and that is it */
9561 #ifdef SCTP_AUDITING_ENABLED
9562 sctp_auditing(20, inp, stcb, NULL);
9564 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9565 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9566 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9567 /* No, not sent to this net or not ready for rtx */
9570 if (chk->data == NULL) {
9571 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9572 chk->rec.data.tsn, chk->snd_count, chk->sent);
9575 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9576 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9577 struct mbuf *op_err;
9578 char msg[SCTP_DIAG_INFO_LEN];
9580 SCTP_SNPRINTF(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9581 chk->rec.data.tsn, chk->snd_count);
9582 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9584 atomic_add_int(&stcb->asoc.refcnt, 1);
9585 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9587 SCTP_TCB_LOCK(stcb);
9588 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9589 return (SCTP_RETRAN_EXIT);
9591 /* pick up the net */
9593 switch (net->ro._l_addr.sa.sa_family) {
9596 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9601 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9610 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9611 /* No room in peers rwnd */
9614 tsn = asoc->last_acked_seq + 1;
9615 if (tsn == chk->rec.data.tsn) {
9617 * we make a special exception for this
9618 * case. The peer has no rwnd but is missing
9619 * the lowest chunk.. which is probably what
9620 * is holding up the rwnd.
9622 goto one_chunk_around;
9627 if (asoc->peers_rwnd < mtu) {
9629 if ((asoc->peers_rwnd == 0) &&
9630 (asoc->total_flight == 0)) {
9631 chk->window_probe = 1;
9632 chk->whoTo->window_probe = 1;
9635 #ifdef SCTP_AUDITING_ENABLED
9636 sctp_audit_log(0xC3, 2);
9640 net->fast_retran_ip = 0;
9641 if (chk->rec.data.doing_fast_retransmit == 0) {
9643 * if no FR in progress skip destination that have
9644 * flight_size > cwnd.
9646 if (net->flight_size >= net->cwnd) {
9651 * Mark the destination net to have FR recovery
9655 net->fast_retran_ip = 1;
9659 * if no AUTH is yet included and this chunk requires it,
9660 * make sure to account for it. We don't apply the size
9661 * until the AUTH chunk is actually added below in case
9662 * there is no room for this chunk.
9664 if (data_auth_reqd && (auth == NULL)) {
9665 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9669 if ((chk->send_size <= (mtu - dmtu)) ||
9670 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9671 /* ok we will add this one */
9672 if (data_auth_reqd) {
9674 m = sctp_add_auth_chunk(m,
9680 auth_keyid = chk->auth_keyid;
9682 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9683 } else if (override_ok) {
9684 auth_keyid = chk->auth_keyid;
9686 } else if (chk->auth_keyid != auth_keyid) {
9687 /* different keyid, so done bundling */
9691 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9693 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9696 /* Do clear IP_DF ? */
9697 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9700 /* upate our MTU size */
9701 if (mtu > (chk->send_size + dmtu))
9702 mtu -= (chk->send_size + dmtu);
9705 data_list[bundle_at++] = chk;
9706 if (one_chunk && (asoc->total_flight <= 0)) {
9707 SCTP_STAT_INCR(sctps_windowprobed);
9710 if (one_chunk == 0) {
9712 * now are there anymore forward from chk to pick
9715 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9716 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9717 /* Nope, not for retran */
9720 if (fwd->whoTo != net) {
9721 /* Nope, not the net in question */
9724 if (data_auth_reqd && (auth == NULL)) {
9725 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9728 if (fwd->send_size <= (mtu - dmtu)) {
9729 if (data_auth_reqd) {
9731 m = sctp_add_auth_chunk(m,
9737 auth_keyid = fwd->auth_keyid;
9739 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9740 } else if (override_ok) {
9741 auth_keyid = fwd->auth_keyid;
9743 } else if (fwd->auth_keyid != auth_keyid) {
9751 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9753 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9756 /* Do clear IP_DF ? */
9757 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9760 /* upate our MTU size */
9761 if (mtu > (fwd->send_size + dmtu))
9762 mtu -= (fwd->send_size + dmtu);
9765 data_list[bundle_at++] = fwd;
9766 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9770 /* can't fit so we are done */
9775 /* Is there something to send for this destination? */
9778 * No matter if we fail/or succeed we should start a
9779 * timer. A failure is like a lost IP packet :-)
9781 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9783 * no timer running on this destination
9786 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9789 /* Now lets send it, if there is anything to send :> */
9790 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9791 (struct sockaddr *)&net->ro._l_addr, m,
9792 auth_offset, auth, auth_keyid,
9793 no_fragmentflg, 0, 0,
9794 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9798 /* error, we could not output */
9799 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9800 if (error == ENOBUFS) {
9801 asoc->ifp_had_enobuf = 1;
9802 SCTP_STAT_INCR(sctps_lowlevelerr);
9806 asoc->ifp_had_enobuf = 0;
9813 * We don't want to mark the net->sent time here
9814 * since this we use this for HB and retrans cannot
9817 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9819 /* For auto-close */
9821 if (*now_filled == 0) {
9822 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9823 *now = asoc->time_last_sent;
9826 asoc->time_last_sent = *now;
9828 *cnt_out += bundle_at;
9829 #ifdef SCTP_AUDITING_ENABLED
9830 sctp_audit_log(0xC4, bundle_at);
9833 tsns_sent = data_list[0]->rec.data.tsn;
9835 for (i = 0; i < bundle_at; i++) {
9836 SCTP_STAT_INCR(sctps_sendretransdata);
9837 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9839 * When we have a revoked data, and we
9840 * retransmit it, then we clear the revoked
9841 * flag since this flag dictates if we
9842 * subtracted from the fs
9844 if (data_list[i]->rec.data.chunk_was_revoked) {
9845 /* Deflate the cwnd */
9846 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9847 data_list[i]->rec.data.chunk_was_revoked = 0;
9849 data_list[i]->snd_count++;
9850 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9851 /* record the time */
9852 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9853 if (data_list[i]->book_size_scale) {
9855 * need to double the book size on
9858 data_list[i]->book_size_scale = 0;
9860 * Since we double the booksize, we
9861 * must also double the output queue
9862 * size, since this get shrunk when
9863 * we free by this amount.
9865 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9866 data_list[i]->book_size *= 2;
9868 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9869 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9870 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9872 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9873 (uint32_t)(data_list[i]->send_size +
9874 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9876 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9877 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9878 data_list[i]->whoTo->flight_size,
9879 data_list[i]->book_size,
9880 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9881 data_list[i]->rec.data.tsn);
9883 sctp_flight_size_increase(data_list[i]);
9884 sctp_total_flight_increase(stcb, data_list[i]);
9885 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9886 /* SWS sender side engages */
9887 asoc->peers_rwnd = 0;
9890 (data_list[i]->rec.data.doing_fast_retransmit)) {
9891 SCTP_STAT_INCR(sctps_sendfastretrans);
9892 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9893 (tmr_started == 0)) {
9895 * ok we just fast-retrans'd
9896 * the lowest TSN, i.e the
9897 * first on the list. In
9898 * this case we want to give
9899 * some more time to get a
9900 * SACK back without a
9903 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9904 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9905 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9909 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9910 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9912 #ifdef SCTP_AUDITING_ENABLED
9913 sctp_auditing(21, inp, stcb, NULL);
9919 if (asoc->sent_queue_retran_cnt <= 0) {
9920 /* all done we have no more to retran */
9921 asoc->sent_queue_retran_cnt = 0;
9925 /* No more room in rwnd */
9928 /* stop the for loop here. we sent out a packet */
9935 sctp_timer_validation(struct sctp_inpcb *inp,
9936 struct sctp_tcb *stcb,
9937 struct sctp_association *asoc)
9939 struct sctp_nets *net;
9941 /* Validate that a timer is running somewhere */
9942 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9943 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9944 /* Here is a timer */
9948 SCTP_TCB_LOCK_ASSERT(stcb);
9949 /* Gak, we did not have a timer somewhere */
9950 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9951 if (asoc->alternate) {
9952 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9954 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9960 sctp_chunk_output(struct sctp_inpcb *inp,
9961 struct sctp_tcb *stcb,
9966 * Ok this is the generic chunk service queue. we must do the
9968 * - See if there are retransmits pending, if so we must
9970 * - Service the stream queue that is next, moving any
9971 * message (note I must get a complete message i.e.
9972 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9974 * - Check to see if the cwnd/rwnd allows any output, if so we
9975 * go ahead and fomulate and send the low level chunks. Making sure
9976 * to combine any control in the control chunk queue also.
9978 struct sctp_association *asoc;
9979 struct sctp_nets *net;
9980 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9981 unsigned int burst_cnt = 0;
9985 uint32_t frag_point = sctp_get_frag_point(stcb);
9988 unsigned int tot_frs = 0;
9992 /* The Nagle algorithm is only applied when handling a send call. */
9993 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9994 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10002 SCTP_TCB_LOCK_ASSERT(stcb);
10004 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10006 if ((un_sent <= 0) &&
10007 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10008 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10009 (asoc->sent_queue_retran_cnt == 0) &&
10010 (asoc->trigger_reset == 0)) {
10011 /* Nothing to do unless there is something to be sent left */
10015 * Do we have something to send, data or control AND a sack timer
10016 * running, if so piggy-back the sack.
10018 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10019 sctp_send_sack(stcb, so_locked);
10020 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
10021 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10023 while (asoc->sent_queue_retran_cnt) {
10025 * Ok, it is retransmission time only, we send out only ONE
10026 * packet with a single call off to the retran code.
10028 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10030 * Special hook for handling cookiess discarded
10031 * by peer that carried data. Send cookie-ack only
10032 * and then the next call with get the retran's.
10034 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10036 &now, &now_filled, frag_point, so_locked);
10038 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10039 /* if its not from a HB then do it */
10041 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10047 * its from any other place, we don't allow retran
10048 * output (only control)
10053 /* Can't send anymore */
10055 * now lets push out control by calling med-level
10056 * output once. this assures that we WILL send HB's
10059 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10061 &now, &now_filled, frag_point, so_locked);
10062 #ifdef SCTP_AUDITING_ENABLED
10063 sctp_auditing(8, inp, stcb, NULL);
10065 sctp_timer_validation(inp, stcb, asoc);
10070 * The count was off.. retran is not happening so do
10071 * the normal retransmission.
10073 #ifdef SCTP_AUDITING_ENABLED
10074 sctp_auditing(9, inp, stcb, NULL);
10076 if (ret == SCTP_RETRAN_EXIT) {
10081 if (from_where == SCTP_OUTPUT_FROM_T3) {
10082 /* Only one transmission allowed out of a timeout */
10083 #ifdef SCTP_AUDITING_ENABLED
10084 sctp_auditing(10, inp, stcb, NULL);
10086 /* Push out any control */
10087 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10088 &now, &now_filled, frag_point, so_locked);
10091 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10092 /* Hit FR burst limit */
10095 if ((num_out == 0) && (ret == 0)) {
10096 /* No more retrans to send */
10100 #ifdef SCTP_AUDITING_ENABLED
10101 sctp_auditing(12, inp, stcb, NULL);
10103 /* Check for bad destinations, if they exist move chunks around. */
10104 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10105 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10107 * if possible move things off of this address we
10108 * still may send below due to the dormant state but
10109 * we try to find an alternate address to send to
10110 * and if we have one we move all queued data on the
10111 * out wheel to this alternate address.
10113 if (net->ref_count > 1)
10114 sctp_move_chunks_from_net(stcb, net);
10117 * if ((asoc->sat_network) || (net->addr_is_local))
10118 * { burst_limit = asoc->max_burst *
10119 * SCTP_SAT_NETWORK_BURST_INCR; }
10121 if (asoc->max_burst > 0) {
10122 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10123 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10125 * JRS - Use the congestion
10126 * control given in the
10127 * congestion control module
10129 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10130 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10131 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10133 SCTP_STAT_INCR(sctps_maxburstqueued);
10135 net->fast_retran_ip = 0;
10137 if (net->flight_size == 0) {
10139 * Should be decaying the
10150 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10151 &reason_code, 0, from_where,
10152 &now, &now_filled, frag_point, so_locked);
10154 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10155 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10156 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10158 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10159 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10160 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10164 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10166 tot_out += num_out;
10168 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10169 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10170 if (num_out == 0) {
10171 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10176 * When the Nagle algorithm is used, look at how
10177 * much is unsent, then if its smaller than an MTU
10178 * and we have data in flight we stop, except if we
10179 * are handling a fragmented user message.
10181 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10182 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10183 (stcb->asoc.total_flight > 0)) {
10184 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10188 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10189 TAILQ_EMPTY(&asoc->send_queue) &&
10190 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10191 /* Nothing left to send */
10194 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10195 /* Nothing left to send */
10198 } while (num_out &&
10199 ((asoc->max_burst == 0) ||
10200 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10201 (burst_cnt < asoc->max_burst)));
10203 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10204 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10205 SCTP_STAT_INCR(sctps_maxburstqueued);
10206 asoc->burst_limit_applied = 1;
10207 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10208 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10211 asoc->burst_limit_applied = 0;
10214 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10215 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10217 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10221 * Now we need to clean up the control chunk chain if a ECNE is on
10222 * it. It must be marked as UNSENT again so next call will continue
10223 * to send it until such time that we get a CWR, to remove it.
10225 if (stcb->asoc.ecn_echo_cnt_onq)
10226 sctp_fix_ecn_echo(asoc);
10228 if (stcb->asoc.trigger_reset) {
10229 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10238 struct sctp_inpcb *inp,
10240 struct sockaddr *addr,
10241 struct mbuf *control,
10246 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10250 if (inp->sctp_socket == NULL) {
10251 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10254 return (sctp_sosend(inp->sctp_socket,
10256 (struct uio *)NULL,
10264 send_forward_tsn(struct sctp_tcb *stcb,
10265 struct sctp_association *asoc)
10267 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10268 struct sctp_forward_tsn_chunk *fwdtsn;
10269 struct sctp_strseq *strseq;
10270 struct sctp_strseq_mid *strseq_m;
10271 uint32_t advance_peer_ack_point;
10272 unsigned int cnt_of_space, i, ovh;
10273 unsigned int space_needed;
10274 unsigned int cnt_of_skipped = 0;
10276 SCTP_TCB_LOCK_ASSERT(stcb);
10277 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10278 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10279 /* mark it to unsent */
10280 chk->sent = SCTP_DATAGRAM_UNSENT;
10281 chk->snd_count = 0;
10282 /* Do we correct its output location? */
10284 sctp_free_remote_addr(chk->whoTo);
10287 goto sctp_fill_in_rest;
10290 /* Ok if we reach here we must build one */
10291 sctp_alloc_a_chunk(stcb, chk);
10295 asoc->fwd_tsn_cnt++;
10296 chk->copy_by_ref = 0;
10298 * We don't do the old thing here since this is used not for on-wire
10299 * but to tell if we are sending a fwd-tsn by the stack during
10300 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10302 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10303 chk->rec.chunk_id.can_take_data = 0;
10307 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10308 if (chk->data == NULL) {
10309 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10312 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10313 chk->sent = SCTP_DATAGRAM_UNSENT;
10314 chk->snd_count = 0;
10315 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10316 asoc->ctrl_queue_cnt++;
10319 * Here we go through and fill out the part that deals with
10320 * stream/seq of the ones we skip.
10322 SCTP_BUF_LEN(chk->data) = 0;
10323 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10324 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10325 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10326 /* no more to look at */
10329 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10330 /* We don't report these */
10335 if (asoc->idata_supported) {
10336 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10337 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10339 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10340 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10342 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10344 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10345 ovh = SCTP_MIN_OVERHEAD;
10347 ovh = SCTP_MIN_V4_OVERHEAD;
10349 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10350 /* trim to a mtu size */
10351 cnt_of_space = asoc->smallest_mtu - ovh;
10353 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10354 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10355 0xff, 0, cnt_of_skipped,
10356 asoc->advanced_peer_ack_point);
10358 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10359 if (cnt_of_space < space_needed) {
10361 * ok we must trim down the chunk by lowering the
10362 * advance peer ack point.
10364 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10365 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10366 0xff, 0xff, cnt_of_space,
10369 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10370 if (asoc->idata_supported) {
10371 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10373 cnt_of_skipped /= sizeof(struct sctp_strseq);
10376 * Go through and find the TSN that will be the one
10379 at = TAILQ_FIRST(&asoc->sent_queue);
10381 for (i = 0; i < cnt_of_skipped; i++) {
10382 tp1 = TAILQ_NEXT(at, sctp_next);
10389 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10390 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10391 0xff, cnt_of_skipped, at->rec.data.tsn,
10392 asoc->advanced_peer_ack_point);
10396 * last now points to last one I can report, update
10400 advance_peer_ack_point = last->rec.data.tsn;
10402 if (asoc->idata_supported) {
10403 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10404 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10406 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10407 cnt_of_skipped * sizeof(struct sctp_strseq);
10410 chk->send_size = space_needed;
10411 /* Setup the chunk */
10412 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10413 fwdtsn->ch.chunk_length = htons(chk->send_size);
10414 fwdtsn->ch.chunk_flags = 0;
10415 if (asoc->idata_supported) {
10416 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10418 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10420 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10421 SCTP_BUF_LEN(chk->data) = chk->send_size;
10424 * Move pointer to after the fwdtsn and transfer to the
10427 if (asoc->idata_supported) {
10428 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10431 strseq = (struct sctp_strseq *)fwdtsn;
10435 * Now populate the strseq list. This is done blindly
10436 * without pulling out duplicate stream info. This is
10437 * inefficent but won't harm the process since the peer will
10438 * look at these in sequence and will thus release anything.
10439 * It could mean we exceed the PMTU and chop off some that
10440 * we could have included.. but this is unlikely (aka 1432/4
10441 * would mean 300+ stream seq's would have to be reported in
10442 * one FWD-TSN. With a bit of work we can later FIX this to
10443 * optimize and pull out duplicates.. but it does add more
10444 * overhead. So for now... not!
10447 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10448 if (i >= cnt_of_skipped) {
10451 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10452 /* We don't report these */
10455 if (at->rec.data.tsn == advance_peer_ack_point) {
10456 at->rec.data.fwd_tsn_cnt = 0;
10458 if (asoc->idata_supported) {
10459 strseq_m->sid = htons(at->rec.data.sid);
10460 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10461 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10463 strseq_m->flags = 0;
10465 strseq_m->mid = htonl(at->rec.data.mid);
10468 strseq->sid = htons(at->rec.data.sid);
10469 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10478 sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
10481 * Queue up a SACK or NR-SACK in the control queue.
10482 * We must first check to see if a SACK or NR-SACK is
10483 * somehow on the control queue.
10484 * If so, we will take and and remove the old one.
10486 struct sctp_association *asoc;
10487 struct sctp_tmit_chunk *chk, *a_chk;
10488 struct sctp_sack_chunk *sack;
10489 struct sctp_nr_sack_chunk *nr_sack;
10490 struct sctp_gap_ack_block *gap_descriptor;
10491 const struct sack_track *selector;
10496 int limit_reached = 0;
10497 unsigned int i, siz, j;
10498 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10501 uint32_t highest_tsn;
10506 if (stcb->asoc.nrsack_supported == 1) {
10507 type = SCTP_NR_SELECTIVE_ACK;
10509 type = SCTP_SELECTIVE_ACK;
10512 asoc = &stcb->asoc;
10513 SCTP_TCB_LOCK_ASSERT(stcb);
10514 if (asoc->last_data_chunk_from == NULL) {
10515 /* Hmm we never received anything */
10518 sctp_slide_mapping_arrays(stcb);
10519 sctp_set_rwnd(stcb, asoc);
10520 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10521 if (chk->rec.chunk_id.id == type) {
10522 /* Hmm, found a sack already on queue, remove it */
10523 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10524 asoc->ctrl_queue_cnt--;
10527 sctp_m_freem(a_chk->data);
10528 a_chk->data = NULL;
10530 if (a_chk->whoTo) {
10531 sctp_free_remote_addr(a_chk->whoTo);
10532 a_chk->whoTo = NULL;
10537 if (a_chk == NULL) {
10538 sctp_alloc_a_chunk(stcb, a_chk);
10539 if (a_chk == NULL) {
10540 /* No memory so we drop the idea, and set a timer */
10541 if (stcb->asoc.delayed_ack) {
10542 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10543 stcb->sctp_ep, stcb, NULL,
10544 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10545 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10546 stcb->sctp_ep, stcb, NULL);
10548 stcb->asoc.send_sack = 1;
10552 a_chk->copy_by_ref = 0;
10553 a_chk->rec.chunk_id.id = type;
10554 a_chk->rec.chunk_id.can_take_data = 1;
10556 /* Clear our pkt counts */
10557 asoc->data_pkts_seen = 0;
10560 a_chk->asoc = asoc;
10561 a_chk->snd_count = 0;
10562 a_chk->send_size = 0; /* fill in later */
10563 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10564 a_chk->whoTo = NULL;
10566 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10568 * Ok, the destination for the SACK is unreachable, lets see if
10569 * we can select an alternate to asoc->last_data_chunk_from
10571 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10572 if (a_chk->whoTo == NULL) {
10573 /* Nope, no alternate */
10574 a_chk->whoTo = asoc->last_data_chunk_from;
10577 a_chk->whoTo = asoc->last_data_chunk_from;
10579 if (a_chk->whoTo) {
10580 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10582 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10583 highest_tsn = asoc->highest_tsn_inside_map;
10585 highest_tsn = asoc->highest_tsn_inside_nr_map;
10587 if (highest_tsn == asoc->cumulative_tsn) {
10589 if (type == SCTP_SELECTIVE_ACK) {
10590 space_req = sizeof(struct sctp_sack_chunk);
10592 space_req = sizeof(struct sctp_nr_sack_chunk);
10595 /* gaps get a cluster */
10596 space_req = MCLBYTES;
10598 /* Ok now lets formulate a MBUF with our sack */
10599 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10600 if ((a_chk->data == NULL) ||
10601 (a_chk->whoTo == NULL)) {
10602 /* rats, no mbuf memory */
10604 /* was a problem with the destination */
10605 sctp_m_freem(a_chk->data);
10606 a_chk->data = NULL;
10608 sctp_free_a_chunk(stcb, a_chk, so_locked);
10609 /* sa_ignore NO_NULL_CHK */
10610 if (stcb->asoc.delayed_ack) {
10611 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10612 stcb->sctp_ep, stcb, NULL,
10613 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10614 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10615 stcb->sctp_ep, stcb, NULL);
10617 stcb->asoc.send_sack = 1;
10621 /* ok, lets go through and fill it in */
10622 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10623 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10624 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10625 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10627 limit = mtod(a_chk->data, caddr_t);
10632 if ((asoc->sctp_cmt_on_off > 0) &&
10633 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10635 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10636 * received, then set high bit to 1, else 0. Reset
10639 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10640 asoc->cmt_dac_pkts_rcvd = 0;
10642 #ifdef SCTP_ASOCLOG_OF_TSNS
10643 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10644 stcb->asoc.cumack_log_atsnt++;
10645 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10646 stcb->asoc.cumack_log_atsnt = 0;
10649 /* reset the readers interpretation */
10650 stcb->freed_by_sorcv_sincelast = 0;
10652 if (type == SCTP_SELECTIVE_ACK) {
10653 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10655 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10656 if (highest_tsn > asoc->mapping_array_base_tsn) {
10657 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10659 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
10663 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10664 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10665 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10666 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10668 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10672 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10675 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10677 if (((type == SCTP_SELECTIVE_ACK) &&
10678 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10679 ((type == SCTP_NR_SELECTIVE_ACK) &&
10680 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10681 /* we have a gap .. maybe */
10682 for (i = 0; i < siz; i++) {
10683 tsn_map = asoc->mapping_array[i];
10684 if (type == SCTP_SELECTIVE_ACK) {
10685 tsn_map |= asoc->nr_mapping_array[i];
10689 * Clear all bits corresponding to TSNs
10690 * smaller or equal to the cumulative TSN.
10692 tsn_map &= (~0U << (1 - offset));
10694 selector = &sack_array[tsn_map];
10695 if (mergeable && selector->right_edge) {
10697 * Backup, left and right edges were ok to
10703 if (selector->num_entries == 0)
10706 for (j = 0; j < selector->num_entries; j++) {
10707 if (mergeable && selector->right_edge) {
10709 * do a merge by NOT setting
10715 * no merge, set the left
10719 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10721 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10724 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10730 if (selector->left_edge) {
10734 if (limit_reached) {
10735 /* Reached the limit stop */
10741 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10742 (limit_reached == 0)) {
10745 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10746 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10748 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10751 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10754 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10756 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10757 /* we have a gap .. maybe */
10758 for (i = 0; i < siz; i++) {
10759 tsn_map = asoc->nr_mapping_array[i];
10762 * Clear all bits corresponding to
10763 * TSNs smaller or equal to the
10766 tsn_map &= (~0U << (1 - offset));
10768 selector = &sack_array[tsn_map];
10769 if (mergeable && selector->right_edge) {
10771 * Backup, left and right edges were
10774 num_nr_gap_blocks--;
10777 if (selector->num_entries == 0)
10780 for (j = 0; j < selector->num_entries; j++) {
10781 if (mergeable && selector->right_edge) {
10783 * do a merge by NOT
10790 * no merge, set the
10794 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10796 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10797 num_nr_gap_blocks++;
10799 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10805 if (selector->left_edge) {
10809 if (limit_reached) {
10810 /* Reached the limit stop */
10817 /* now we must add any dups we are going to report. */
10818 if ((limit_reached == 0) && (asoc->numduptsns)) {
10819 dup = (uint32_t *)gap_descriptor;
10820 for (i = 0; i < asoc->numduptsns; i++) {
10821 *dup = htonl(asoc->dup_tsns[i]);
10824 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10829 asoc->numduptsns = 0;
10832 * now that the chunk is prepared queue it to the control chunk
10835 if (type == SCTP_SELECTIVE_ACK) {
10836 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10837 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10838 num_dups * sizeof(int32_t));
10839 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10840 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10841 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10842 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10843 sack->sack.num_dup_tsns = htons(num_dups);
10844 sack->ch.chunk_type = type;
10845 sack->ch.chunk_flags = flags;
10846 sack->ch.chunk_length = htons(a_chk->send_size);
10848 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10849 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10850 num_dups * sizeof(int32_t));
10851 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10852 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10853 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10854 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10855 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10856 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10857 nr_sack->nr_sack.reserved = 0;
10858 nr_sack->ch.chunk_type = type;
10859 nr_sack->ch.chunk_flags = flags;
10860 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10862 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10863 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10864 asoc->ctrl_queue_cnt++;
10865 asoc->send_sack = 0;
10866 SCTP_STAT_INCR(sctps_sendsacks);
10871 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked)
10873 struct mbuf *m_abort, *m, *m_last;
10874 struct mbuf *m_out, *m_end = NULL;
10875 struct sctp_abort_chunk *abort;
10876 struct sctp_auth_chunk *auth = NULL;
10877 struct sctp_nets *net;
10879 uint32_t auth_offset = 0;
10881 uint16_t cause_len, chunk_len, padding_len;
10883 SCTP_TCB_LOCK_ASSERT(stcb);
10885 * Add an AUTH chunk, if chunk requires it and save the offset into
10886 * the chain for AUTH
10888 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10889 stcb->asoc.peer_auth_chunks)) {
10890 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10891 stcb, SCTP_ABORT_ASSOCIATION);
10892 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10896 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10897 if (m_abort == NULL) {
10899 sctp_m_freem(m_out);
10902 sctp_m_freem(operr);
10906 /* link in any error */
10907 SCTP_BUF_NEXT(m_abort) = operr;
10910 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10911 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10912 if (SCTP_BUF_NEXT(m) == NULL) {
10916 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10917 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10918 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10919 if (m_out == NULL) {
10920 /* NO Auth chunk prepended, so reserve space in front */
10921 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10924 /* Put AUTH chunk at the front of the chain */
10925 SCTP_BUF_NEXT(m_end) = m_abort;
10927 if (stcb->asoc.alternate) {
10928 net = stcb->asoc.alternate;
10930 net = stcb->asoc.primary_destination;
10932 /* Fill in the ABORT chunk header. */
10933 abort = mtod(m_abort, struct sctp_abort_chunk *);
10934 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10935 if (stcb->asoc.peer_vtag == 0) {
10936 /* This happens iff the assoc is in COOKIE-WAIT state. */
10937 vtag = stcb->asoc.my_vtag;
10938 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10940 vtag = stcb->asoc.peer_vtag;
10941 abort->ch.chunk_flags = 0;
10943 abort->ch.chunk_length = htons(chunk_len);
10944 /* Add padding, if necessary. */
10945 if (padding_len > 0) {
10946 if ((m_last == NULL) ||
10947 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10948 sctp_m_freem(m_out);
10952 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10953 (struct sockaddr *)&net->ro._l_addr,
10954 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10955 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10956 stcb->asoc.primary_destination->port, NULL,
10959 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10960 if (error == ENOBUFS) {
10961 stcb->asoc.ifp_had_enobuf = 1;
10962 SCTP_STAT_INCR(sctps_lowlevelerr);
10965 stcb->asoc.ifp_had_enobuf = 0;
10967 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10971 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10972 struct sctp_nets *net,
10975 /* formulate and SEND a SHUTDOWN-COMPLETE */
10976 struct mbuf *m_shutdown_comp;
10977 struct sctp_shutdown_complete_chunk *shutdown_complete;
10982 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10983 if (m_shutdown_comp == NULL) {
10987 if (reflect_vtag) {
10988 flags = SCTP_HAD_NO_TCB;
10989 vtag = stcb->asoc.my_vtag;
10992 vtag = stcb->asoc.peer_vtag;
10994 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10995 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10996 shutdown_complete->ch.chunk_flags = flags;
10997 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10998 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10999 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11000 (struct sockaddr *)&net->ro._l_addr,
11001 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11002 stcb->sctp_ep->sctp_lport, stcb->rport,
11006 SCTP_SO_NOT_LOCKED))) {
11007 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11008 if (error == ENOBUFS) {
11009 stcb->asoc.ifp_had_enobuf = 1;
11010 SCTP_STAT_INCR(sctps_lowlevelerr);
11013 stcb->asoc.ifp_had_enobuf = 0;
11015 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11020 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11021 struct sctphdr *sh, uint32_t vtag,
11022 uint8_t type, struct mbuf *cause,
11023 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11024 uint32_t vrf_id, uint16_t port)
11026 struct mbuf *o_pak;
11028 struct sctphdr *shout;
11029 struct sctp_chunkhdr *ch;
11030 #if defined(INET) || defined(INET6)
11031 struct udphdr *udp;
11033 int ret, len, cause_len, padding_len;
11035 struct sockaddr_in *src_sin, *dst_sin;
11039 struct sockaddr_in6 *src_sin6, *dst_sin6;
11040 struct ip6_hdr *ip6;
11043 /* Compute the length of the cause and add final padding. */
11045 if (cause != NULL) {
11046 struct mbuf *m_at, *m_last = NULL;
11048 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11049 if (SCTP_BUF_NEXT(m_at) == NULL)
11051 cause_len += SCTP_BUF_LEN(m_at);
11053 padding_len = cause_len % 4;
11054 if (padding_len != 0) {
11055 padding_len = 4 - padding_len;
11057 if (padding_len != 0) {
11058 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11059 sctp_m_freem(cause);
11066 /* Get an mbuf for the header. */
11067 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11068 switch (dst->sa_family) {
11071 len += sizeof(struct ip);
11076 len += sizeof(struct ip6_hdr);
11082 #if defined(INET) || defined(INET6)
11084 len += sizeof(struct udphdr);
11087 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11088 if (mout == NULL) {
11090 sctp_m_freem(cause);
11094 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11095 SCTP_BUF_LEN(mout) = len;
11096 SCTP_BUF_NEXT(mout) = cause;
11097 M_SETFIB(mout, fibnum);
11098 mout->m_pkthdr.flowid = mflowid;
11099 M_HASHTYPE_SET(mout, mflowtype);
11106 switch (dst->sa_family) {
11109 src_sin = (struct sockaddr_in *)src;
11110 dst_sin = (struct sockaddr_in *)dst;
11111 ip = mtod(mout, struct ip *);
11112 ip->ip_v = IPVERSION;
11113 ip->ip_hl = (sizeof(struct ip) >> 2);
11115 ip->ip_off = htons(IP_DF);
11117 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11119 ip->ip_p = IPPROTO_UDP;
11121 ip->ip_p = IPPROTO_SCTP;
11123 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11124 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11126 len = sizeof(struct ip);
11127 shout = (struct sctphdr *)((caddr_t)ip + len);
11132 src_sin6 = (struct sockaddr_in6 *)src;
11133 dst_sin6 = (struct sockaddr_in6 *)dst;
11134 ip6 = mtod(mout, struct ip6_hdr *);
11135 ip6->ip6_flow = htonl(0x60000000);
11136 if (V_ip6_auto_flowlabel) {
11137 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11139 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11141 ip6->ip6_nxt = IPPROTO_UDP;
11143 ip6->ip6_nxt = IPPROTO_SCTP;
11145 ip6->ip6_src = dst_sin6->sin6_addr;
11146 ip6->ip6_dst = src_sin6->sin6_addr;
11147 len = sizeof(struct ip6_hdr);
11148 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11153 shout = mtod(mout, struct sctphdr *);
11156 #if defined(INET) || defined(INET6)
11158 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11159 sctp_m_freem(mout);
11162 udp = (struct udphdr *)shout;
11163 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11164 udp->uh_dport = port;
11166 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11167 sizeof(struct sctphdr) +
11168 sizeof(struct sctp_chunkhdr) +
11169 cause_len + padding_len));
11170 len += sizeof(struct udphdr);
11171 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11176 shout->src_port = sh->dest_port;
11177 shout->dest_port = sh->src_port;
11178 shout->checksum = 0;
11180 shout->v_tag = htonl(vtag);
11182 shout->v_tag = sh->v_tag;
11184 len += sizeof(struct sctphdr);
11185 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11186 ch->chunk_type = type;
11188 ch->chunk_flags = 0;
11190 ch->chunk_flags = SCTP_HAD_NO_TCB;
11192 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11193 len += sizeof(struct sctp_chunkhdr);
11194 len += cause_len + padding_len;
11196 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11197 sctp_m_freem(mout);
11200 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11201 switch (dst->sa_family) {
11206 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11211 ip->ip_len = htons(len);
11213 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11214 SCTP_STAT_INCR(sctps_sendswcrc);
11216 SCTP_ENABLE_UDP_CSUM(o_pak);
11219 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11220 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11221 SCTP_STAT_INCR(sctps_sendhwcrc);
11223 #ifdef SCTP_PACKET_LOGGING
11224 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11225 sctp_packet_log(o_pak);
11228 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11229 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11234 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11236 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11237 SCTP_STAT_INCR(sctps_sendswcrc);
11238 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11239 udp->uh_sum = 0xffff;
11242 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11243 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11244 SCTP_STAT_INCR(sctps_sendhwcrc);
11246 #ifdef SCTP_PACKET_LOGGING
11247 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11248 sctp_packet_log(o_pak);
11251 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11252 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11256 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11258 sctp_m_freem(mout);
11259 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11262 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11264 UDPSTAT_INC(udps_opackets);
11266 SCTP_STAT_INCR(sctps_sendpackets);
11267 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11268 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11270 SCTP_STAT_INCR(sctps_senderrors);
11276 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11277 struct sctphdr *sh,
11278 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11279 uint32_t vrf_id, uint16_t port)
11281 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11282 mflowtype, mflowid, fibnum,
11287 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
11289 struct sctp_tmit_chunk *chk;
11290 struct sctp_heartbeat_chunk *hb;
11291 struct timeval now;
11293 SCTP_TCB_LOCK_ASSERT(stcb);
11297 (void)SCTP_GETTIME_TIMEVAL(&now);
11298 switch (net->ro._l_addr.sa.sa_family) {
11310 sctp_alloc_a_chunk(stcb, chk);
11312 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11316 chk->copy_by_ref = 0;
11317 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11318 chk->rec.chunk_id.can_take_data = 1;
11320 chk->asoc = &stcb->asoc;
11321 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11323 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11324 if (chk->data == NULL) {
11325 sctp_free_a_chunk(stcb, chk, so_locked);
11328 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11329 SCTP_BUF_LEN(chk->data) = chk->send_size;
11330 chk->sent = SCTP_DATAGRAM_UNSENT;
11331 chk->snd_count = 0;
11333 atomic_add_int(&chk->whoTo->ref_count, 1);
11334 /* Now we have a mbuf that we can fill in with the details */
11335 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11336 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11337 /* fill out chunk header */
11338 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11339 hb->ch.chunk_flags = 0;
11340 hb->ch.chunk_length = htons(chk->send_size);
11341 /* Fill out hb parameter */
11342 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11343 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11344 hb->heartbeat.hb_info.time_value_1 = (uint32_t)now.tv_sec;
11345 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11346 /* Did our user request this one, put it in */
11347 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11348 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11349 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11351 * we only take from the entropy pool if the address is not
11354 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11355 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11357 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11358 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11360 switch (net->ro._l_addr.sa.sa_family) {
11363 memcpy(hb->heartbeat.hb_info.address,
11364 &net->ro._l_addr.sin.sin_addr,
11365 sizeof(net->ro._l_addr.sin.sin_addr));
11370 memcpy(hb->heartbeat.hb_info.address,
11371 &net->ro._l_addr.sin6.sin6_addr,
11372 sizeof(net->ro._l_addr.sin6.sin6_addr));
11377 sctp_m_freem(chk->data);
11380 sctp_free_a_chunk(stcb, chk, so_locked);
11384 net->hb_responded = 0;
11385 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11386 stcb->asoc.ctrl_queue_cnt++;
11387 SCTP_STAT_INCR(sctps_sendheartbeat);
11392 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11395 struct sctp_association *asoc;
11396 struct sctp_ecne_chunk *ecne;
11397 struct sctp_tmit_chunk *chk;
11402 asoc = &stcb->asoc;
11403 SCTP_TCB_LOCK_ASSERT(stcb);
11404 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11405 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11406 /* found a previous ECN_ECHO update it if needed */
11407 uint32_t cnt, ctsn;
11409 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11410 ctsn = ntohl(ecne->tsn);
11411 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11412 ecne->tsn = htonl(high_tsn);
11413 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11415 cnt = ntohl(ecne->num_pkts_since_cwr);
11417 ecne->num_pkts_since_cwr = htonl(cnt);
11421 /* nope could not find one to update so we must build one */
11422 sctp_alloc_a_chunk(stcb, chk);
11426 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11427 chk->copy_by_ref = 0;
11428 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11429 chk->rec.chunk_id.can_take_data = 0;
11431 chk->asoc = &stcb->asoc;
11432 chk->send_size = sizeof(struct sctp_ecne_chunk);
11433 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11434 if (chk->data == NULL) {
11435 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11438 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11439 SCTP_BUF_LEN(chk->data) = chk->send_size;
11440 chk->sent = SCTP_DATAGRAM_UNSENT;
11441 chk->snd_count = 0;
11443 atomic_add_int(&chk->whoTo->ref_count, 1);
11445 stcb->asoc.ecn_echo_cnt_onq++;
11446 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11447 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11448 ecne->ch.chunk_flags = 0;
11449 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11450 ecne->tsn = htonl(high_tsn);
11451 ecne->num_pkts_since_cwr = htonl(1);
11452 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11453 asoc->ctrl_queue_cnt++;
11457 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11458 struct mbuf *m, int len, int iphlen, int bad_crc)
11460 struct sctp_association *asoc;
11461 struct sctp_pktdrop_chunk *drp;
11462 struct sctp_tmit_chunk *chk;
11468 struct sctp_chunkhdr *ch, chunk_buf;
11469 unsigned int chk_length;
11474 asoc = &stcb->asoc;
11475 SCTP_TCB_LOCK_ASSERT(stcb);
11476 if (asoc->pktdrop_supported == 0) {
11478 * peer must declare support before I send one.
11482 if (stcb->sctp_socket == NULL) {
11485 sctp_alloc_a_chunk(stcb, chk);
11489 chk->copy_by_ref = 0;
11490 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11491 chk->rec.chunk_id.can_take_data = 1;
11494 chk->send_size = len;
11495 /* Validate that we do not have an ABORT in here. */
11496 offset = iphlen + sizeof(struct sctphdr);
11497 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11498 sizeof(*ch), (uint8_t *)&chunk_buf);
11499 while (ch != NULL) {
11500 chk_length = ntohs(ch->chunk_length);
11501 if (chk_length < sizeof(*ch)) {
11502 /* break to abort land */
11505 switch (ch->chunk_type) {
11506 case SCTP_PACKET_DROPPED:
11507 case SCTP_ABORT_ASSOCIATION:
11508 case SCTP_INITIATION_ACK:
11510 * We don't respond with an PKT-DROP to an ABORT
11511 * or PKT-DROP. We also do not respond to an
11512 * INIT-ACK, because we can't know if the initiation
11513 * tag is correct or not.
11515 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11520 offset += SCTP_SIZE32(chk_length);
11521 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11522 sizeof(*ch), (uint8_t *)&chunk_buf);
11525 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11526 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11528 * only send 1 mtu worth, trim off the excess on the end.
11531 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11534 chk->asoc = &stcb->asoc;
11535 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11536 if (chk->data == NULL) {
11538 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11541 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11542 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11544 sctp_m_freem(chk->data);
11548 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11549 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11550 chk->book_size_scale = 0;
11552 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11553 drp->trunc_len = htons(fullsz);
11555 * Len is already adjusted to size minus overhead above take
11556 * out the pkt_drop chunk itself from it.
11558 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11559 len = chk->send_size;
11561 /* no truncation needed */
11562 drp->ch.chunk_flags = 0;
11563 drp->trunc_len = htons(0);
11566 drp->ch.chunk_flags |= SCTP_BADCRC;
11568 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11569 SCTP_BUF_LEN(chk->data) = chk->send_size;
11570 chk->sent = SCTP_DATAGRAM_UNSENT;
11571 chk->snd_count = 0;
11573 /* we should hit here */
11575 atomic_add_int(&chk->whoTo->ref_count, 1);
11579 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11580 drp->ch.chunk_length = htons(chk->send_size);
11581 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11585 drp->bottle_bw = htonl(spc);
11586 if (asoc->my_rwnd) {
11587 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11588 asoc->size_on_all_streams +
11589 asoc->my_rwnd_control_len +
11590 stcb->sctp_socket->so_rcv.sb_cc);
11593 * If my rwnd is 0, possibly from mbuf depletion as well as
11594 * space used, tell the peer there is NO space aka onq == bw
11596 drp->current_onq = htonl(spc);
11600 m_copydata(m, iphlen, len, (caddr_t)datap);
11601 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11602 asoc->ctrl_queue_cnt++;
11606 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11608 struct sctp_association *asoc;
11609 struct sctp_cwr_chunk *cwr;
11610 struct sctp_tmit_chunk *chk;
11612 SCTP_TCB_LOCK_ASSERT(stcb);
11616 asoc = &stcb->asoc;
11617 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11618 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11620 * found a previous CWR queued to same destination
11621 * update it if needed
11625 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11626 ctsn = ntohl(cwr->tsn);
11627 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11628 cwr->tsn = htonl(high_tsn);
11630 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11631 /* Make sure override is carried */
11632 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11637 sctp_alloc_a_chunk(stcb, chk);
11641 chk->copy_by_ref = 0;
11642 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11643 chk->rec.chunk_id.can_take_data = 1;
11645 chk->asoc = &stcb->asoc;
11646 chk->send_size = sizeof(struct sctp_cwr_chunk);
11647 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11648 if (chk->data == NULL) {
11649 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11652 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11653 SCTP_BUF_LEN(chk->data) = chk->send_size;
11654 chk->sent = SCTP_DATAGRAM_UNSENT;
11655 chk->snd_count = 0;
11657 atomic_add_int(&chk->whoTo->ref_count, 1);
11658 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11659 cwr->ch.chunk_type = SCTP_ECN_CWR;
11660 cwr->ch.chunk_flags = override;
11661 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11662 cwr->tsn = htonl(high_tsn);
11663 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11664 asoc->ctrl_queue_cnt++;
11668 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11669 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11671 uint16_t len, old_len, i;
11672 struct sctp_stream_reset_out_request *req_out;
11673 struct sctp_chunkhdr *ch;
11675 int number_entries = 0;
11677 ch = mtod(chk->data, struct sctp_chunkhdr *);
11678 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11679 /* get to new offset for the param. */
11680 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11681 /* now how long will this param be? */
11682 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11683 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11684 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11685 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11689 if (number_entries == 0) {
11692 if (number_entries == stcb->asoc.streamoutcnt) {
11693 number_entries = 0;
11695 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11696 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11698 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11699 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11700 req_out->ph.param_length = htons(len);
11701 req_out->request_seq = htonl(seq);
11702 req_out->response_seq = htonl(resp_seq);
11703 req_out->send_reset_at_tsn = htonl(last_sent);
11705 if (number_entries) {
11706 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11707 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11708 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11709 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11710 req_out->list_of_streams[at] = htons(i);
11712 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11713 if (at >= number_entries) {
11719 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11720 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11723 if (SCTP_SIZE32(len) > len) {
11725 * Need to worry about the pad we may end up adding to the
11726 * end. This is easy since the struct is either aligned to 4
11727 * bytes or 2 bytes off.
11729 req_out->list_of_streams[number_entries] = 0;
11731 /* now fix the chunk length */
11732 ch->chunk_length = htons(len + old_len);
11733 chk->book_size = len + old_len;
11734 chk->book_size_scale = 0;
11735 chk->send_size = SCTP_SIZE32(chk->book_size);
11736 SCTP_BUF_LEN(chk->data) = chk->send_size;
11741 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11742 int number_entries, uint16_t *list,
11745 uint16_t len, old_len, i;
11746 struct sctp_stream_reset_in_request *req_in;
11747 struct sctp_chunkhdr *ch;
11749 ch = mtod(chk->data, struct sctp_chunkhdr *);
11750 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11752 /* get to new offset for the param. */
11753 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11754 /* now how long will this param be? */
11755 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11756 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11757 req_in->ph.param_length = htons(len);
11758 req_in->request_seq = htonl(seq);
11759 if (number_entries) {
11760 for (i = 0; i < number_entries; i++) {
11761 req_in->list_of_streams[i] = htons(list[i]);
11764 if (SCTP_SIZE32(len) > len) {
11766 * Need to worry about the pad we may end up adding to the
11767 * end. This is easy since the struct is either aligned to 4
11768 * bytes or 2 bytes off.
11770 req_in->list_of_streams[number_entries] = 0;
11772 /* now fix the chunk length */
11773 ch->chunk_length = htons(len + old_len);
11774 chk->book_size = len + old_len;
11775 chk->book_size_scale = 0;
11776 chk->send_size = SCTP_SIZE32(chk->book_size);
11777 SCTP_BUF_LEN(chk->data) = chk->send_size;
11782 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11785 uint16_t len, old_len;
11786 struct sctp_stream_reset_tsn_request *req_tsn;
11787 struct sctp_chunkhdr *ch;
11789 ch = mtod(chk->data, struct sctp_chunkhdr *);
11790 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11792 /* get to new offset for the param. */
11793 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11794 /* now how long will this param be? */
11795 len = sizeof(struct sctp_stream_reset_tsn_request);
11796 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11797 req_tsn->ph.param_length = htons(len);
11798 req_tsn->request_seq = htonl(seq);
11800 /* now fix the chunk length */
11801 ch->chunk_length = htons(len + old_len);
11802 chk->send_size = len + old_len;
11803 chk->book_size = SCTP_SIZE32(chk->send_size);
11804 chk->book_size_scale = 0;
11805 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11810 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11811 uint32_t resp_seq, uint32_t result)
11813 uint16_t len, old_len;
11814 struct sctp_stream_reset_response *resp;
11815 struct sctp_chunkhdr *ch;
11817 ch = mtod(chk->data, struct sctp_chunkhdr *);
11818 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11820 /* get to new offset for the param. */
11821 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11822 /* now how long will this param be? */
11823 len = sizeof(struct sctp_stream_reset_response);
11824 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11825 resp->ph.param_length = htons(len);
11826 resp->response_seq = htonl(resp_seq);
11827 resp->result = ntohl(result);
11829 /* now fix the chunk length */
11830 ch->chunk_length = htons(len + old_len);
11831 chk->book_size = len + old_len;
11832 chk->book_size_scale = 0;
11833 chk->send_size = SCTP_SIZE32(chk->book_size);
11834 SCTP_BUF_LEN(chk->data) = chk->send_size;
11839 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11840 struct sctp_stream_reset_list *ent,
11843 struct sctp_association *asoc;
11844 struct sctp_tmit_chunk *chk;
11845 struct sctp_chunkhdr *ch;
11847 asoc = &stcb->asoc;
11850 * Reset our last reset action to the new one IP -> response
11851 * (PERFORMED probably). This assures that if we fail to send, a
11852 * retran from the peer will get the new response.
11854 asoc->last_reset_action[0] = response;
11855 if (asoc->stream_reset_outstanding) {
11858 sctp_alloc_a_chunk(stcb, chk);
11860 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11863 chk->copy_by_ref = 0;
11864 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11865 chk->rec.chunk_id.can_take_data = 0;
11867 chk->asoc = &stcb->asoc;
11868 chk->book_size = sizeof(struct sctp_chunkhdr);
11869 chk->send_size = SCTP_SIZE32(chk->book_size);
11870 chk->book_size_scale = 0;
11871 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11872 if (chk->data == NULL) {
11873 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11874 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11877 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11878 /* setup chunk parameters */
11879 chk->sent = SCTP_DATAGRAM_UNSENT;
11880 chk->snd_count = 0;
11881 if (stcb->asoc.alternate) {
11882 chk->whoTo = stcb->asoc.alternate;
11884 chk->whoTo = stcb->asoc.primary_destination;
11886 ch = mtod(chk->data, struct sctp_chunkhdr *);
11887 ch->chunk_type = SCTP_STREAM_RESET;
11888 ch->chunk_flags = 0;
11889 ch->chunk_length = htons(chk->book_size);
11890 atomic_add_int(&chk->whoTo->ref_count, 1);
11891 SCTP_BUF_LEN(chk->data) = chk->send_size;
11892 sctp_add_stream_reset_result(chk, ent->seq, response);
11893 /* insert the chunk for sending */
11894 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11897 asoc->ctrl_queue_cnt++;
11901 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11902 uint32_t resp_seq, uint32_t result,
11903 uint32_t send_una, uint32_t recv_next)
11905 uint16_t len, old_len;
11906 struct sctp_stream_reset_response_tsn *resp;
11907 struct sctp_chunkhdr *ch;
11909 ch = mtod(chk->data, struct sctp_chunkhdr *);
11910 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11912 /* get to new offset for the param. */
11913 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11914 /* now how long will this param be? */
11915 len = sizeof(struct sctp_stream_reset_response_tsn);
11916 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11917 resp->ph.param_length = htons(len);
11918 resp->response_seq = htonl(resp_seq);
11919 resp->result = htonl(result);
11920 resp->senders_next_tsn = htonl(send_una);
11921 resp->receivers_next_tsn = htonl(recv_next);
11923 /* now fix the chunk length */
11924 ch->chunk_length = htons(len + old_len);
11925 chk->book_size = len + old_len;
11926 chk->send_size = SCTP_SIZE32(chk->book_size);
11927 chk->book_size_scale = 0;
11928 SCTP_BUF_LEN(chk->data) = chk->send_size;
11933 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11937 uint16_t len, old_len;
11938 struct sctp_chunkhdr *ch;
11939 struct sctp_stream_reset_add_strm *addstr;
11941 ch = mtod(chk->data, struct sctp_chunkhdr *);
11942 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11944 /* get to new offset for the param. */
11945 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11946 /* now how long will this param be? */
11947 len = sizeof(struct sctp_stream_reset_add_strm);
11950 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11951 addstr->ph.param_length = htons(len);
11952 addstr->request_seq = htonl(seq);
11953 addstr->number_of_streams = htons(adding);
11954 addstr->reserved = 0;
11956 /* now fix the chunk length */
11957 ch->chunk_length = htons(len + old_len);
11958 chk->send_size = len + old_len;
11959 chk->book_size = SCTP_SIZE32(chk->send_size);
11960 chk->book_size_scale = 0;
11961 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11966 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11970 uint16_t len, old_len;
11971 struct sctp_chunkhdr *ch;
11972 struct sctp_stream_reset_add_strm *addstr;
11974 ch = mtod(chk->data, struct sctp_chunkhdr *);
11975 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11977 /* get to new offset for the param. */
11978 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11979 /* now how long will this param be? */
11980 len = sizeof(struct sctp_stream_reset_add_strm);
11982 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11983 addstr->ph.param_length = htons(len);
11984 addstr->request_seq = htonl(seq);
11985 addstr->number_of_streams = htons(adding);
11986 addstr->reserved = 0;
11988 /* now fix the chunk length */
11989 ch->chunk_length = htons(len + old_len);
11990 chk->send_size = len + old_len;
11991 chk->book_size = SCTP_SIZE32(chk->send_size);
11992 chk->book_size_scale = 0;
11993 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11998 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12000 struct sctp_association *asoc;
12001 struct sctp_tmit_chunk *chk;
12002 struct sctp_chunkhdr *ch;
12005 asoc = &stcb->asoc;
12006 asoc->trigger_reset = 0;
12007 if (asoc->stream_reset_outstanding) {
12010 sctp_alloc_a_chunk(stcb, chk);
12012 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12015 chk->copy_by_ref = 0;
12016 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12017 chk->rec.chunk_id.can_take_data = 0;
12019 chk->asoc = &stcb->asoc;
12020 chk->book_size = sizeof(struct sctp_chunkhdr);
12021 chk->send_size = SCTP_SIZE32(chk->book_size);
12022 chk->book_size_scale = 0;
12023 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12024 if (chk->data == NULL) {
12025 sctp_free_a_chunk(stcb, chk, so_locked);
12026 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12029 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12031 /* setup chunk parameters */
12032 chk->sent = SCTP_DATAGRAM_UNSENT;
12033 chk->snd_count = 0;
12034 if (stcb->asoc.alternate) {
12035 chk->whoTo = stcb->asoc.alternate;
12037 chk->whoTo = stcb->asoc.primary_destination;
12039 ch = mtod(chk->data, struct sctp_chunkhdr *);
12040 ch->chunk_type = SCTP_STREAM_RESET;
12041 ch->chunk_flags = 0;
12042 ch->chunk_length = htons(chk->book_size);
12043 atomic_add_int(&chk->whoTo->ref_count, 1);
12044 SCTP_BUF_LEN(chk->data) = chk->send_size;
12045 seq = stcb->asoc.str_reset_seq_out;
12046 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12048 asoc->stream_reset_outstanding++;
12050 m_freem(chk->data);
12052 sctp_free_a_chunk(stcb, chk, so_locked);
12055 asoc->str_reset = chk;
12056 /* insert the chunk for sending */
12057 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12060 asoc->ctrl_queue_cnt++;
12062 if (stcb->asoc.send_sack) {
12063 sctp_send_sack(stcb, so_locked);
12065 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12070 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12071 uint16_t number_entries, uint16_t *list,
12072 uint8_t send_in_req,
12073 uint8_t send_tsn_req,
12074 uint8_t add_stream,
12076 uint16_t adding_i, uint8_t peer_asked)
12078 struct sctp_association *asoc;
12079 struct sctp_tmit_chunk *chk;
12080 struct sctp_chunkhdr *ch;
12081 int can_send_out_req = 0;
12084 asoc = &stcb->asoc;
12085 if (asoc->stream_reset_outstanding) {
12087 * Already one pending, must get ACK back to clear the flag.
12089 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12092 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12093 (add_stream == 0)) {
12094 /* nothing to do */
12095 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12098 if (send_tsn_req && send_in_req) {
12099 /* error, can't do that */
12100 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12102 } else if (send_in_req) {
12103 can_send_out_req = 1;
12105 if (number_entries > (MCLBYTES -
12106 SCTP_MIN_OVERHEAD -
12107 sizeof(struct sctp_chunkhdr) -
12108 sizeof(struct sctp_stream_reset_out_request)) /
12109 sizeof(uint16_t)) {
12110 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12113 sctp_alloc_a_chunk(stcb, chk);
12115 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12118 chk->copy_by_ref = 0;
12119 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12120 chk->rec.chunk_id.can_take_data = 0;
12122 chk->asoc = &stcb->asoc;
12123 chk->book_size = sizeof(struct sctp_chunkhdr);
12124 chk->send_size = SCTP_SIZE32(chk->book_size);
12125 chk->book_size_scale = 0;
12126 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12127 if (chk->data == NULL) {
12128 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12129 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12132 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12134 /* setup chunk parameters */
12135 chk->sent = SCTP_DATAGRAM_UNSENT;
12136 chk->snd_count = 0;
12137 if (stcb->asoc.alternate) {
12138 chk->whoTo = stcb->asoc.alternate;
12140 chk->whoTo = stcb->asoc.primary_destination;
12142 atomic_add_int(&chk->whoTo->ref_count, 1);
12143 ch = mtod(chk->data, struct sctp_chunkhdr *);
12144 ch->chunk_type = SCTP_STREAM_RESET;
12145 ch->chunk_flags = 0;
12146 ch->chunk_length = htons(chk->book_size);
12147 SCTP_BUF_LEN(chk->data) = chk->send_size;
12149 seq = stcb->asoc.str_reset_seq_out;
12150 if (can_send_out_req) {
12153 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12156 asoc->stream_reset_outstanding++;
12159 if ((add_stream & 1) &&
12160 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12161 /* Need to allocate more */
12162 struct sctp_stream_out *oldstream;
12163 struct sctp_stream_queue_pending *sp, *nsp;
12165 #if defined(SCTP_DETAILED_STR_STATS)
12169 oldstream = stcb->asoc.strmout;
12170 /* get some more */
12171 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12172 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12174 if (stcb->asoc.strmout == NULL) {
12177 stcb->asoc.strmout = oldstream;
12178 /* Turn off the bit */
12179 x = add_stream & 0xfe;
12184 * Ok now we proceed with copying the old out stuff and
12185 * initializing the new stuff.
12187 SCTP_TCB_SEND_LOCK(stcb);
12188 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, false);
12189 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12190 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12191 /* FIX ME FIX ME */
12193 * This should be a SS_COPY operation FIX ME STREAM
12196 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12197 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12198 #if defined(SCTP_DETAILED_STR_STATS)
12199 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12200 stcb->asoc.strmout[i].abandoned_sent[j] = oldstream[i].abandoned_sent[j];
12201 stcb->asoc.strmout[i].abandoned_unsent[j] = oldstream[i].abandoned_unsent[j];
12204 stcb->asoc.strmout[i].abandoned_sent[0] = oldstream[i].abandoned_sent[0];
12205 stcb->asoc.strmout[i].abandoned_unsent[0] = oldstream[i].abandoned_unsent[0];
12207 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12208 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12209 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12210 stcb->asoc.strmout[i].sid = i;
12211 stcb->asoc.strmout[i].state = oldstream[i].state;
12212 /* now anything on those queues? */
12213 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12214 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12215 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12218 /* now the new streams */
12219 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc);
12220 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12221 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12222 stcb->asoc.strmout[i].chunks_on_queues = 0;
12223 #if defined(SCTP_DETAILED_STR_STATS)
12224 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12225 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12226 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12229 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12230 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12232 stcb->asoc.strmout[i].next_mid_ordered = 0;
12233 stcb->asoc.strmout[i].next_mid_unordered = 0;
12234 stcb->asoc.strmout[i].sid = i;
12235 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12236 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12237 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12239 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12240 SCTP_FREE(oldstream, SCTP_M_STRMO);
12241 SCTP_TCB_SEND_UNLOCK(stcb);
12244 if ((add_stream & 1) && (adding_o > 0)) {
12245 asoc->strm_pending_add_size = adding_o;
12246 asoc->peer_req_out = peer_asked;
12247 sctp_add_an_out_stream(chk, seq, adding_o);
12249 asoc->stream_reset_outstanding++;
12251 if ((add_stream & 2) && (adding_i > 0)) {
12252 sctp_add_an_in_stream(chk, seq, adding_i);
12254 asoc->stream_reset_outstanding++;
12257 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12259 asoc->stream_reset_outstanding++;
12261 if (send_tsn_req) {
12262 sctp_add_stream_reset_tsn(chk, seq);
12263 asoc->stream_reset_outstanding++;
12265 asoc->str_reset = chk;
12266 /* insert the chunk for sending */
12267 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12270 asoc->ctrl_queue_cnt++;
12271 if (stcb->asoc.send_sack) {
12272 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12274 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12279 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12280 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12281 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12282 uint32_t vrf_id, uint16_t port)
12284 /* Don't respond to an ABORT with an ABORT. */
12285 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12287 sctp_m_freem(cause);
12290 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12291 mflowtype, mflowid, fibnum,
12297 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12298 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12299 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12300 uint32_t vrf_id, uint16_t port)
12302 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12303 mflowtype, mflowid, fibnum,
12308 static struct mbuf *
12309 sctp_copy_resume(struct uio *uio,
12311 int user_marks_eor,
12314 struct mbuf **new_tail)
12318 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12319 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12321 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12324 *sndout = m_length(m, NULL);
12325 *new_tail = m_last(m);
12331 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12335 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12337 if (sp->data == NULL) {
12338 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12342 sp->tail_mbuf = m_last(sp->data);
12346 static struct sctp_stream_queue_pending *
12347 sctp_copy_it_in(struct sctp_tcb *stcb,
12348 struct sctp_association *asoc,
12349 struct sctp_sndrcvinfo *srcv,
12351 struct sctp_nets *net,
12352 ssize_t max_send_len,
12353 int user_marks_eor,
12358 * This routine must be very careful in its work. Protocol
12359 * processing is up and running so care must be taken to spl...()
12360 * when you need to do something that may effect the stcb/asoc. The
12361 * sb is locked however. When data is copied the protocol processing
12362 * should be enabled since this is a slower operation...
12364 struct sctp_stream_queue_pending *sp = NULL;
12368 /* Now can we send this? */
12369 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12370 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12371 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12372 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12373 /* got data while shutting down */
12374 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12375 *error = ECONNRESET;
12378 sctp_alloc_a_strmoq(stcb, sp);
12380 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12385 sp->sender_all_done = 0;
12386 sp->sinfo_flags = srcv->sinfo_flags;
12387 sp->timetolive = srcv->sinfo_timetolive;
12388 sp->ppid = srcv->sinfo_ppid;
12389 sp->context = srcv->sinfo_context;
12391 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12393 sp->sid = srcv->sinfo_stream;
12394 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12395 if ((sp->length == (uint32_t)uio->uio_resid) &&
12396 ((user_marks_eor == 0) ||
12397 (srcv->sinfo_flags & SCTP_EOF) ||
12398 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12399 sp->msg_is_complete = 1;
12401 sp->msg_is_complete = 0;
12403 sp->sender_all_done = 0;
12404 sp->some_taken = 0;
12405 sp->put_last_out = 0;
12406 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12407 sp->data = sp->tail_mbuf = NULL;
12408 if (sp->length == 0) {
12411 if (srcv->sinfo_keynumber_valid) {
12412 sp->auth_keyid = srcv->sinfo_keynumber;
12414 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12416 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12417 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12418 sp->holds_key_ref = 1;
12420 *error = sctp_copy_one(sp, uio, resv_in_first);
12423 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12426 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12428 atomic_add_int(&sp->net->ref_count, 1);
12432 sctp_set_prsctp_policy(sp);
12439 sctp_sosend(struct socket *so,
12440 struct sockaddr *addr,
12443 struct mbuf *control,
12448 int error, use_sndinfo = 0;
12449 struct sctp_sndrcvinfo sndrcvninfo;
12450 struct sockaddr *addr_to_use;
12451 #if defined(INET) && defined(INET6)
12452 struct sockaddr_in sin;
12456 /* process cmsg snd/rcv info (maybe a assoc-id) */
12457 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12458 sizeof(sndrcvninfo))) {
12463 addr_to_use = addr;
12464 #if defined(INET) && defined(INET6)
12465 if ((addr != NULL) && (addr->sa_family == AF_INET6)) {
12466 struct sockaddr_in6 *sin6;
12468 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
12469 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12472 sin6 = (struct sockaddr_in6 *)addr;
12473 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12474 in6_sin6_2_sin(&sin, sin6);
12475 addr_to_use = (struct sockaddr *)&sin;
12479 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12482 use_sndinfo ? &sndrcvninfo : NULL
12489 sctp_lower_sosend(struct socket *so,
12490 struct sockaddr *addr,
12492 struct mbuf *i_pak,
12493 struct mbuf *control,
12495 struct sctp_sndrcvinfo *srcv
12500 struct epoch_tracker et;
12501 ssize_t sndlen = 0, max_len, local_add_more;
12503 struct mbuf *top = NULL;
12504 int queue_only = 0, queue_only_for_init = 0;
12505 int free_cnt_applied = 0;
12507 int now_filled = 0;
12508 unsigned int inqueue_bytes = 0;
12509 struct sctp_block_entry be;
12510 struct sctp_inpcb *inp;
12511 struct sctp_tcb *stcb = NULL;
12512 struct timeval now;
12513 struct sctp_nets *net;
12514 struct sctp_association *asoc;
12515 struct sctp_inpcb *t_inp;
12516 int user_marks_eor;
12517 int create_lock_applied = 0;
12518 int nagle_applies = 0;
12519 int some_on_control = 0;
12520 int got_all_of_the_send = 0;
12521 int hold_tcblock = 0;
12522 int non_blocking = 0;
12523 ssize_t local_soresv = 0;
12525 uint16_t sinfo_flags;
12526 sctp_assoc_t sinfo_assoc_id;
12533 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12535 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12538 SCTP_RELEASE_PKT(i_pak);
12542 if ((uio == NULL) && (i_pak == NULL)) {
12543 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12546 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12547 atomic_add_int(&inp->total_sends, 1);
12549 if (uio->uio_resid < 0) {
12550 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12553 sndlen = uio->uio_resid;
12555 top = SCTP_HEADER_TO_CHAIN(i_pak);
12556 sndlen = SCTP_HEADER_LEN(i_pak);
12558 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zd\n",
12561 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12562 SCTP_IS_LISTENING(inp)) {
12563 /* The listener can NOT send */
12564 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12569 * Pre-screen address, if one is given the sin-len
12570 * must be set correctly!
12573 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12575 switch (raddr->sa.sa_family) {
12578 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12579 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12583 port = raddr->sin.sin_port;
12588 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12589 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12593 port = raddr->sin6.sin6_port;
12597 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12598 error = EAFNOSUPPORT;
12605 sinfo_flags = srcv->sinfo_flags;
12606 sinfo_assoc_id = srcv->sinfo_assoc_id;
12607 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12608 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12609 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12613 if (srcv->sinfo_flags)
12614 SCTP_STAT_INCR(sctps_sends_with_flags);
12616 sinfo_flags = inp->def_send.sinfo_flags;
12617 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12619 if (flags & MSG_EOR) {
12620 sinfo_flags |= SCTP_EOR;
12622 if (flags & MSG_EOF) {
12623 sinfo_flags |= SCTP_EOF;
12625 if (sinfo_flags & SCTP_SENDALL) {
12626 /* its a sendall */
12627 error = sctp_sendall(inp, uio, top, srcv);
12631 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12632 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12636 /* now we must find the assoc */
12637 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12638 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12639 SCTP_INP_RLOCK(inp);
12640 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12642 SCTP_TCB_LOCK(stcb);
12645 SCTP_INP_RUNLOCK(inp);
12646 } else if (sinfo_assoc_id) {
12647 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12648 if (stcb != NULL) {
12653 * Since we did not use findep we must
12654 * increment it, and if we don't find a tcb
12657 SCTP_INP_WLOCK(inp);
12658 SCTP_INP_INCR_REF(inp);
12659 SCTP_INP_WUNLOCK(inp);
12660 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12661 if (stcb == NULL) {
12662 SCTP_INP_WLOCK(inp);
12663 SCTP_INP_DECR_REF(inp);
12664 SCTP_INP_WUNLOCK(inp);
12669 if ((stcb == NULL) && (addr)) {
12670 /* Possible implicit send? */
12671 SCTP_ASOC_CREATE_LOCK(inp);
12672 create_lock_applied = 1;
12673 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12674 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12675 /* Should I really unlock ? */
12676 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12680 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12681 (addr->sa_family == AF_INET6)) {
12682 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12686 SCTP_INP_WLOCK(inp);
12687 SCTP_INP_INCR_REF(inp);
12688 SCTP_INP_WUNLOCK(inp);
12689 /* With the lock applied look again */
12690 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12691 #if defined(INET) || defined(INET6)
12692 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12693 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12696 if (stcb == NULL) {
12697 SCTP_INP_WLOCK(inp);
12698 SCTP_INP_DECR_REF(inp);
12699 SCTP_INP_WUNLOCK(inp);
12706 if (t_inp != inp) {
12707 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12712 if (stcb == NULL) {
12713 if (addr == NULL) {
12714 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12718 /* We must go ahead and start the INIT process */
12721 if ((sinfo_flags & SCTP_ABORT) ||
12722 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12724 * User asks to abort a non-existent assoc,
12725 * or EOF a non-existent assoc with no data
12727 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12731 /* get an asoc/stcb struct */
12732 vrf_id = inp->def_vrf_id;
12734 if (create_lock_applied == 0) {
12735 panic("Error, should hold create lock and I don't?");
12738 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id,
12739 inp->sctp_ep.pre_open_stream_count,
12742 SCTP_INITIALIZE_AUTH_PARAMS);
12743 if (stcb == NULL) {
12744 /* Error is setup for us in the call */
12748 if (create_lock_applied) {
12749 SCTP_ASOC_CREATE_UNLOCK(inp);
12750 create_lock_applied = 0;
12752 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12755 * Turn on queue only flag to prevent data from
12759 asoc = &stcb->asoc;
12760 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12761 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12764 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12765 sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
12766 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
12772 /* out with the INIT */
12773 queue_only_for_init = 1;
12775 * we may want to dig in after this call and adjust the MTU
12776 * value. It defaulted to 1500 (constant) but the ro
12777 * structure may now have an update and thus we may need to
12778 * change it BEFORE we append the message.
12782 asoc = &stcb->asoc;
12783 if (srcv == NULL) {
12784 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12785 sinfo_flags = srcv->sinfo_flags;
12786 if (flags & MSG_EOR) {
12787 sinfo_flags |= SCTP_EOR;
12789 if (flags & MSG_EOF) {
12790 sinfo_flags |= SCTP_EOF;
12793 if (sinfo_flags & SCTP_ADDR_OVER) {
12795 net = sctp_findnet(stcb, addr);
12798 if ((net == NULL) ||
12799 ((port != 0) && (port != stcb->rport))) {
12800 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12805 if (stcb->asoc.alternate) {
12806 net = stcb->asoc.alternate;
12808 net = stcb->asoc.primary_destination;
12811 atomic_add_int(&stcb->total_sends, 1);
12812 /* Keep the stcb from being freed under our feet */
12813 atomic_add_int(&asoc->refcnt, 1);
12814 free_cnt_applied = 1;
12816 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12817 if (sndlen > (ssize_t)asoc->smallest_mtu) {
12818 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12823 if (SCTP_SO_IS_NBIO(so)
12824 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12828 /* would we block? */
12829 if (non_blocking) {
12832 if (hold_tcblock == 0) {
12833 SCTP_TCB_LOCK(stcb);
12836 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12837 if (user_marks_eor == 0) {
12842 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12843 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12844 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12845 if (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so))
12848 error = EWOULDBLOCK;
12851 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12852 SCTP_TCB_UNLOCK(stcb);
12855 atomic_add_int(&stcb->asoc.sb_send_resv, (int)sndlen);
12857 local_soresv = sndlen;
12858 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12859 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12860 error = ECONNRESET;
12863 if (create_lock_applied) {
12864 SCTP_ASOC_CREATE_UNLOCK(inp);
12865 create_lock_applied = 0;
12867 /* Is the stream no. valid? */
12868 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12869 /* Invalid stream number */
12870 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12874 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12875 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12877 * Can't queue any data while stream reset is underway.
12879 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12884 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12887 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12888 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12891 /* we are now done with all control */
12893 sctp_m_freem(control);
12896 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12897 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12898 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12899 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12900 if (sinfo_flags & SCTP_ABORT) {
12903 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12904 error = ECONNRESET;
12908 /* Ok, we will attempt a msgsnd :> */
12910 p->td_ru.ru_msgsnd++;
12912 /* Are we aborting? */
12913 if (sinfo_flags & SCTP_ABORT) {
12915 ssize_t tot_demand, tot_out = 0, max_out;
12917 SCTP_STAT_INCR(sctps_sends_with_abort);
12918 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12919 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12920 /* It has to be up before we abort */
12921 /* how big is the user initiated abort? */
12922 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12926 if (hold_tcblock) {
12927 SCTP_TCB_UNLOCK(stcb);
12931 struct mbuf *cntm = NULL;
12933 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12935 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12936 tot_out += SCTP_BUF_LEN(cntm);
12940 /* Must fit in a MTU */
12942 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12943 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12945 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12949 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12952 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12956 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12957 max_out -= sizeof(struct sctp_abort_msg);
12958 if (tot_out > max_out) {
12962 struct sctp_paramhdr *ph;
12964 /* now move forward the data pointer */
12965 ph = mtod(mm, struct sctp_paramhdr *);
12966 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12967 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12969 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
12971 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12974 * Here if we can't get his data we
12975 * still abort we just don't get to
12976 * send the users note :-0
12983 SCTP_BUF_NEXT(mm) = top;
12987 if (hold_tcblock == 0) {
12988 SCTP_TCB_LOCK(stcb);
12990 atomic_subtract_int(&stcb->asoc.refcnt, 1);
12991 free_cnt_applied = 0;
12992 /* release this lock, otherwise we hang on ourselves */
12993 NET_EPOCH_ENTER(et);
12994 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, false, SCTP_SO_LOCKED);
12995 NET_EPOCH_EXIT(et);
12996 /* now relock the stcb so everything is sane */
13000 * In this case top is already chained to mm avoid double
13001 * free, since we free it below if top != NULL and driver
13002 * would free it after sending the packet out
13009 /* Calculate the maximum we can send */
13010 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13011 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13012 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13016 if (hold_tcblock) {
13017 SCTP_TCB_UNLOCK(stcb);
13020 if (asoc->strmout == NULL) {
13021 /* huh? software error */
13022 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13027 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13028 if ((user_marks_eor == 0) &&
13029 (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13030 /* It will NEVER fit */
13031 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13035 if ((uio == NULL) && user_marks_eor) {
13037 * We do not support eeor mode for
13038 * sending with mbuf chains (like sendfile).
13040 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13045 if (user_marks_eor) {
13046 local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13049 * For non-eeor the whole message must fit in
13050 * the socket send buffer.
13052 local_add_more = sndlen;
13054 if (non_blocking) {
13055 goto skip_preblock;
13057 if (((max_len <= local_add_more) &&
13058 ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13060 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13061 /* No room right now ! */
13062 SOCKBUF_LOCK(&so->so_snd);
13063 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13064 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13065 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13066 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
13067 (unsigned int)SCTP_SB_LIMIT_SND(so),
13070 stcb->asoc.stream_queue_cnt,
13071 stcb->asoc.chunks_on_out_queue,
13072 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13073 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13074 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13077 stcb->block_entry = &be;
13078 error = sbwait(&so->so_snd);
13079 stcb->block_entry = NULL;
13080 if (error || so->so_error || be.error) {
13083 error = so->so_error;
13088 SOCKBUF_UNLOCK(&so->so_snd);
13091 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13092 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13093 asoc, stcb->asoc.total_output_queue_size);
13095 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13096 SOCKBUF_UNLOCK(&so->so_snd);
13099 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13101 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13102 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13106 SOCKBUF_UNLOCK(&so->so_snd);
13110 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13114 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13115 * case NOTE: uio will be null when top/mbuf is passed
13118 if (sinfo_flags & SCTP_EOF) {
13119 got_all_of_the_send = 1;
13122 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13128 struct sctp_stream_queue_pending *sp;
13129 struct sctp_stream_out *strm;
13132 SCTP_TCB_SEND_LOCK(stcb);
13133 if ((asoc->stream_locked) &&
13134 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13135 SCTP_TCB_SEND_UNLOCK(stcb);
13136 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13140 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13141 if (strm->last_msg_incomplete == 0) {
13143 SCTP_TCB_SEND_UNLOCK(stcb);
13144 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13148 SCTP_TCB_SEND_LOCK(stcb);
13149 /* The out streams might be reallocated. */
13150 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13151 if (sp->msg_is_complete) {
13152 strm->last_msg_incomplete = 0;
13153 asoc->stream_locked = 0;
13156 * Just got locked to this guy in case of an
13159 strm->last_msg_incomplete = 1;
13160 if (stcb->asoc.idata_supported == 0) {
13161 asoc->stream_locked = 1;
13162 asoc->stream_locked_on = srcv->sinfo_stream;
13164 sp->sender_all_done = 0;
13166 sctp_snd_sb_alloc(stcb, sp->length);
13167 atomic_add_int(&asoc->stream_queue_cnt, 1);
13168 if (sinfo_flags & SCTP_UNORDERED) {
13169 SCTP_STAT_INCR(sctps_sends_with_unord);
13171 sp->processing = 1;
13172 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13173 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp);
13175 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13177 /* ???? Huh ??? last msg is gone */
13179 panic("Warning: Last msg marked incomplete, yet nothing left?");
13181 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13182 strm->last_msg_incomplete = 0;
13186 if (sp->processing) {
13187 SCTP_TCB_SEND_UNLOCK(stcb);
13188 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13192 sp->processing = 1;
13195 SCTP_TCB_SEND_UNLOCK(stcb);
13196 while (uio->uio_resid > 0) {
13197 /* How much room do we have? */
13198 struct mbuf *new_tail, *mm;
13200 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13201 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13202 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13206 if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13207 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13208 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13211 if (hold_tcblock) {
13212 SCTP_TCB_UNLOCK(stcb);
13215 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13216 if ((mm == NULL) || error) {
13220 SCTP_TCB_SEND_LOCK(stcb);
13221 if (((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) &&
13222 ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) == 0) &&
13224 sp->processing = 0;
13226 SCTP_TCB_SEND_UNLOCK(stcb);
13229 /* Update the mbuf and count */
13230 SCTP_TCB_SEND_LOCK(stcb);
13231 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13232 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13234 * we need to get out. Peer probably
13238 if (stcb->asoc.state & SCTP_STATE_WAS_ABORTED) {
13239 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13240 error = ECONNRESET;
13242 SCTP_TCB_SEND_UNLOCK(stcb);
13245 if (sp->tail_mbuf) {
13246 /* tack it to the end */
13247 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13248 sp->tail_mbuf = new_tail;
13250 /* A stolen mbuf */
13252 sp->tail_mbuf = new_tail;
13254 sctp_snd_sb_alloc(stcb, sndout);
13255 atomic_add_int(&sp->length, sndout);
13256 if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13257 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13260 /* Did we reach EOR? */
13261 if ((uio->uio_resid == 0) &&
13262 ((user_marks_eor == 0) ||
13263 (sinfo_flags & SCTP_EOF) ||
13264 (user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
13265 sp->msg_is_complete = 1;
13267 sp->msg_is_complete = 0;
13269 SCTP_TCB_SEND_UNLOCK(stcb);
13271 if (uio->uio_resid == 0) {
13276 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13278 * This is ugly but we must assure locking
13281 if (hold_tcblock == 0) {
13282 SCTP_TCB_LOCK(stcb);
13285 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13286 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13287 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13288 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13294 SCTP_TCB_UNLOCK(stcb);
13297 /* wait for space now */
13298 if (non_blocking) {
13299 /* Non-blocking io in place out */
13300 SCTP_TCB_SEND_LOCK(stcb);
13302 sp->processing = 0;
13304 SCTP_TCB_SEND_UNLOCK(stcb);
13307 /* What about the INIT, send it maybe */
13308 if (queue_only_for_init) {
13309 if (hold_tcblock == 0) {
13310 SCTP_TCB_LOCK(stcb);
13313 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13314 /* a collision took us forward? */
13317 NET_EPOCH_ENTER(et);
13318 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13319 NET_EPOCH_EXIT(et);
13320 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13324 if ((net->flight_size > net->cwnd) &&
13325 (asoc->sctp_cmt_on_off == 0)) {
13326 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13328 } else if (asoc->ifp_had_enobuf) {
13329 SCTP_STAT_INCR(sctps_ifnomemqueued);
13330 if (net->flight_size > (2 * net->mtu)) {
13333 asoc->ifp_had_enobuf = 0;
13335 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13336 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13337 (stcb->asoc.total_flight > 0) &&
13338 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13339 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13341 * Ok, Nagle is set on and we have data outstanding.
13342 * Don't send anything and let SACKs drive out the
13343 * data unless we have a "full" segment to send.
13345 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13346 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13348 SCTP_STAT_INCR(sctps_naglequeued);
13351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13352 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13353 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13355 SCTP_STAT_INCR(sctps_naglesent);
13358 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13359 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13360 nagle_applies, un_sent);
13361 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13362 stcb->asoc.total_flight,
13363 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13365 if (queue_only_for_init)
13366 queue_only_for_init = 0;
13367 if ((queue_only == 0) && (nagle_applies == 0)) {
13369 * need to start chunk output
13370 * before blocking.. note that if
13371 * a lock is already applied, then
13372 * the input via the net is happening
13373 * and I don't need to start output :-D
13375 NET_EPOCH_ENTER(et);
13376 if (hold_tcblock == 0) {
13377 if (SCTP_TCB_TRYLOCK(stcb)) {
13379 sctp_chunk_output(inp,
13381 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13384 sctp_chunk_output(inp,
13386 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13388 NET_EPOCH_EXIT(et);
13390 if (hold_tcblock == 1) {
13391 SCTP_TCB_UNLOCK(stcb);
13394 SOCKBUF_LOCK(&so->so_snd);
13396 * This is a bit strange, but I think it will
13397 * work. The total_output_queue_size is locked and
13398 * protected by the TCB_LOCK, which we just released.
13399 * There is a race that can occur between releasing it
13400 * above, and me getting the socket lock, where sacks
13401 * come in but we have not put the SB_WAIT on the
13402 * so_snd buffer to get the wakeup. After the LOCK
13403 * is applied the sack_processing will also need to
13404 * LOCK the so->so_snd to do the actual sowwakeup(). So
13405 * once we have the socket buffer lock if we recheck the
13406 * size we KNOW we will get to sleep safely with the
13407 * wakeup flag in place.
13409 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13410 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13411 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13412 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13413 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13414 asoc, uio->uio_resid);
13417 stcb->block_entry = &be;
13418 error = sbwait(&so->so_snd);
13419 stcb->block_entry = NULL;
13421 if (error || so->so_error || be.error) {
13424 error = so->so_error;
13429 SOCKBUF_UNLOCK(&so->so_snd);
13430 SCTP_TCB_SEND_LOCK(stcb);
13431 if (((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) &&
13432 ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) == 0) &&
13434 sp->processing = 0;
13436 SCTP_TCB_SEND_UNLOCK(stcb);
13440 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13441 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13442 asoc, stcb->asoc.total_output_queue_size);
13445 SOCKBUF_UNLOCK(&so->so_snd);
13446 SCTP_TCB_SEND_LOCK(stcb);
13447 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13448 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13449 SCTP_TCB_SEND_UNLOCK(stcb);
13452 SCTP_TCB_SEND_UNLOCK(stcb);
13454 SCTP_TCB_SEND_LOCK(stcb);
13455 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13456 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13457 SCTP_TCB_SEND_UNLOCK(stcb);
13461 if (sp->msg_is_complete == 0) {
13462 strm->last_msg_incomplete = 1;
13463 if (stcb->asoc.idata_supported == 0) {
13464 asoc->stream_locked = 1;
13465 asoc->stream_locked_on = srcv->sinfo_stream;
13468 sp->sender_all_done = 1;
13469 strm->last_msg_incomplete = 0;
13470 asoc->stream_locked = 0;
13472 sp->processing = 0;
13474 SCTP_PRINTF("Huh no sp TSNH?\n");
13475 strm->last_msg_incomplete = 0;
13476 asoc->stream_locked = 0;
13478 SCTP_TCB_SEND_UNLOCK(stcb);
13479 if (uio->uio_resid == 0) {
13480 got_all_of_the_send = 1;
13483 /* We send in a 0, since we do NOT have any locks */
13484 error = sctp_msg_append(stcb, net, top, srcv, 0);
13486 if (sinfo_flags & SCTP_EOF) {
13487 got_all_of_the_send = 1;
13495 if ((sinfo_flags & SCTP_EOF) &&
13496 (got_all_of_the_send == 1)) {
13497 SCTP_STAT_INCR(sctps_sends_with_eof);
13499 if (hold_tcblock == 0) {
13500 SCTP_TCB_LOCK(stcb);
13503 if (TAILQ_EMPTY(&asoc->send_queue) &&
13504 TAILQ_EMPTY(&asoc->sent_queue) &&
13505 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13506 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13509 /* there is nothing queued to send, so I'm done... */
13510 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13511 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13512 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13513 struct sctp_nets *netp;
13515 /* only send SHUTDOWN the first time through */
13516 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13517 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13519 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13520 sctp_stop_timers_for_shutdown(stcb);
13521 if (stcb->asoc.alternate) {
13522 netp = stcb->asoc.alternate;
13524 netp = stcb->asoc.primary_destination;
13526 sctp_send_shutdown(stcb, netp);
13527 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13529 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13534 * we still got (or just got) data to send, so set
13538 * XXX sockets draft says that SCTP_EOF should be
13539 * sent with no data. currently, we will allow user
13540 * data to be sent first and move to
13543 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13544 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13545 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13546 if (hold_tcblock == 0) {
13547 SCTP_TCB_LOCK(stcb);
13550 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13551 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13553 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13554 if (TAILQ_EMPTY(&asoc->send_queue) &&
13555 TAILQ_EMPTY(&asoc->sent_queue) &&
13556 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13557 struct mbuf *op_err;
13558 char msg[SCTP_DIAG_INFO_LEN];
13561 if (free_cnt_applied) {
13562 atomic_subtract_int(&stcb->asoc.refcnt, 1);
13563 free_cnt_applied = 0;
13565 SCTP_SNPRINTF(msg, sizeof(msg),
13566 "%s:%d at %s", __FILE__, __LINE__, __func__);
13567 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13569 NET_EPOCH_ENTER(et);
13570 sctp_abort_an_association(stcb->sctp_ep, stcb,
13571 op_err, false, SCTP_SO_LOCKED);
13572 NET_EPOCH_EXIT(et);
13574 * now relock the stcb so everything
13581 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13583 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13588 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13589 some_on_control = 1;
13591 if (queue_only_for_init) {
13592 if (hold_tcblock == 0) {
13593 SCTP_TCB_LOCK(stcb);
13596 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13597 /* a collision took us forward? */
13600 NET_EPOCH_ENTER(et);
13601 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13602 NET_EPOCH_EXIT(et);
13603 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13607 if ((net->flight_size > net->cwnd) &&
13608 (stcb->asoc.sctp_cmt_on_off == 0)) {
13609 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13611 } else if (asoc->ifp_had_enobuf) {
13612 SCTP_STAT_INCR(sctps_ifnomemqueued);
13613 if (net->flight_size > (2 * net->mtu)) {
13616 asoc->ifp_had_enobuf = 0;
13618 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13619 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13620 (stcb->asoc.total_flight > 0) &&
13621 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13622 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13624 * Ok, Nagle is set on and we have data outstanding.
13625 * Don't send anything and let SACKs drive out the
13626 * data unless wen have a "full" segment to send.
13628 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13629 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13631 SCTP_STAT_INCR(sctps_naglequeued);
13634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13635 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13636 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13638 SCTP_STAT_INCR(sctps_naglesent);
13641 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13642 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13643 nagle_applies, un_sent);
13644 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13645 stcb->asoc.total_flight,
13646 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13648 NET_EPOCH_ENTER(et);
13649 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13650 /* we can attempt to send too. */
13651 if (hold_tcblock == 0) {
13653 * If there is activity recv'ing sacks no need to
13656 if (SCTP_TCB_TRYLOCK(stcb)) {
13657 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13661 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13663 } else if ((queue_only == 0) &&
13664 (stcb->asoc.peers_rwnd == 0) &&
13665 (stcb->asoc.total_flight == 0)) {
13666 /* We get to have a probe outstanding */
13667 if (hold_tcblock == 0) {
13669 SCTP_TCB_LOCK(stcb);
13671 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13672 } else if (some_on_control) {
13673 int num_out, reason;
13675 /* Here we do control only */
13676 if (hold_tcblock == 0) {
13678 SCTP_TCB_LOCK(stcb);
13680 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13681 &reason, 1, 1, &now, &now_filled,
13682 sctp_get_frag_point(stcb),
13685 NET_EPOCH_EXIT(et);
13686 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13687 queue_only, stcb->asoc.peers_rwnd, un_sent,
13688 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13689 stcb->asoc.total_output_queue_size, error);
13694 if (local_soresv && stcb) {
13695 atomic_subtract_int(&stcb->asoc.sb_send_resv, (int)sndlen);
13697 if (create_lock_applied) {
13698 SCTP_ASOC_CREATE_UNLOCK(inp);
13700 if ((stcb) && hold_tcblock) {
13701 SCTP_TCB_UNLOCK(stcb);
13703 if (stcb && free_cnt_applied) {
13704 atomic_subtract_int(&stcb->asoc.refcnt, 1);
13708 if (mtx_owned(&stcb->tcb_mtx)) {
13709 panic("Leaving with tcb mtx owned?");
13711 if (mtx_owned(&stcb->tcb_send_mtx)) {
13712 panic("Leaving with tcb send mtx owned?");
13720 sctp_m_freem(control);
13726 * generate an AUTHentication chunk, if required
13729 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13730 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13731 struct sctp_tcb *stcb, uint8_t chunk)
13733 struct mbuf *m_auth;
13734 struct sctp_auth_chunk *auth;
13738 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13742 if (stcb->asoc.auth_supported == 0) {
13745 /* does the requested chunk require auth? */
13746 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13749 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13750 if (m_auth == NULL) {
13754 /* reserve some space if this will be the first mbuf */
13756 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13757 /* fill in the AUTH chunk details */
13758 auth = mtod(m_auth, struct sctp_auth_chunk *);
13759 memset(auth, 0, sizeof(*auth));
13760 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13761 auth->ch.chunk_flags = 0;
13762 chunk_len = sizeof(*auth) +
13763 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13764 auth->ch.chunk_length = htons(chunk_len);
13765 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13766 /* key id and hmac digest will be computed and filled in upon send */
13768 /* save the offset where the auth was inserted into the chain */
13770 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13771 *offset += SCTP_BUF_LEN(cn);
13774 /* update length and return pointer to the auth chunk */
13775 SCTP_BUF_LEN(m_auth) = chunk_len;
13776 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13777 if (auth_ret != NULL)
13785 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13787 struct nd_prefix *pfx = NULL;
13788 struct nd_pfxrouter *pfxrtr = NULL;
13789 struct sockaddr_in6 gw6;
13791 if (ro == NULL || ro->ro_nh == NULL || src6->sin6_family != AF_INET6)
13794 /* get prefix entry of address */
13796 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13797 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13799 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13800 &src6->sin6_addr, &pfx->ndpr_mask))
13803 /* no prefix entry in the prefix list */
13806 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13807 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13811 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13812 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13814 /* search installed gateway from prefix entry */
13815 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13816 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13817 gw6.sin6_family = AF_INET6;
13818 gw6.sin6_len = sizeof(struct sockaddr_in6);
13819 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13820 sizeof(struct in6_addr));
13821 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13822 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13823 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13824 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13825 if (sctp_cmpaddr((struct sockaddr *)&gw6, &ro->ro_nh->gw_sa)) {
13827 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13832 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13838 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13841 struct sockaddr_in *sin, *mask;
13842 struct ifaddr *ifa;
13843 struct in_addr srcnetaddr, gwnetaddr;
13845 if (ro == NULL || ro->ro_nh == NULL ||
13846 sifa->address.sa.sa_family != AF_INET) {
13849 ifa = (struct ifaddr *)sifa->ifa;
13850 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13851 sin = &sifa->address.sin;
13852 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13853 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13854 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13855 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13857 sin = &ro->ro_nh->gw4_sa;
13858 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13859 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13860 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13861 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13862 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {