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,
6222 struct sctp_association *asoc)
6227 * For endpoints that have both v6 and v4 addresses we must reserve
6228 * room for the ipv6 header, for those that are only dealing with V4
6229 * we use a larger frag point.
6231 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6232 ovh = SCTP_MIN_OVERHEAD;
6234 ovh = SCTP_MIN_V4_OVERHEAD;
6236 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6237 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6238 siz = asoc->smallest_mtu - ovh;
6240 siz = (stcb->asoc.sctp_frag_point - ovh);
6242 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6244 /* A data chunk MUST fit in a cluster */
6245 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6248 /* adjust for an AUTH chunk if DATA requires auth */
6249 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6250 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6253 /* make it an even word boundary please */
6260 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6263 * We assume that the user wants PR_SCTP_TTL if the user provides a
6264 * positive lifetime but does not specify any PR_SCTP policy.
6266 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6267 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6268 } else if (sp->timetolive > 0) {
6269 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6270 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6274 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6275 case CHUNK_FLAGS_PR_SCTP_BUF:
6277 * Time to live is a priority stored in tv_sec when doing
6278 * the buffer drop thing.
6280 sp->ts.tv_sec = sp->timetolive;
6283 case CHUNK_FLAGS_PR_SCTP_TTL:
6287 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6288 tv.tv_sec = sp->timetolive / 1000;
6289 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6291 * TODO sctp_constants.h needs alternative time
6292 * macros when _KERNEL is undefined.
6294 timevaladd(&sp->ts, &tv);
6297 case CHUNK_FLAGS_PR_SCTP_RTX:
6299 * Time to live is a the number or retransmissions stored in
6302 sp->ts.tv_sec = sp->timetolive;
6306 SCTPDBG(SCTP_DEBUG_USRREQ1,
6307 "Unknown PR_SCTP policy %u.\n",
6308 PR_SCTP_POLICY(sp->sinfo_flags));
6314 sctp_msg_append(struct sctp_tcb *stcb,
6315 struct sctp_nets *net,
6317 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6321 struct sctp_stream_queue_pending *sp = NULL;
6322 struct sctp_stream_out *strm;
6325 * Given an mbuf chain, put it into the association send queue and
6326 * place it on the wheel
6328 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6329 /* Invalid stream number */
6330 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6334 if ((stcb->asoc.stream_locked) &&
6335 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6336 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6340 /* Now can we send this? */
6341 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6342 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6343 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6344 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6345 /* got data while shutting down */
6346 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6350 sctp_alloc_a_strmoq(stcb, sp);
6352 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6356 sp->sinfo_flags = srcv->sinfo_flags;
6357 sp->timetolive = srcv->sinfo_timetolive;
6358 sp->ppid = srcv->sinfo_ppid;
6359 sp->context = srcv->sinfo_context;
6361 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6363 atomic_add_int(&sp->net->ref_count, 1);
6367 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6368 sp->sid = srcv->sinfo_stream;
6369 sp->msg_is_complete = 1;
6370 sp->sender_all_done = 1;
6373 sp->tail_mbuf = NULL;
6374 sctp_set_prsctp_policy(sp);
6376 * We could in theory (for sendall) sifa the length in, but we would
6377 * still have to hunt through the chain since we need to setup the
6381 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6382 if (SCTP_BUF_NEXT(at) == NULL)
6384 sp->length += SCTP_BUF_LEN(at);
6386 if (srcv->sinfo_keynumber_valid) {
6387 sp->auth_keyid = srcv->sinfo_keynumber;
6389 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6391 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6392 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6393 sp->holds_key_ref = 1;
6395 if (hold_stcb_lock == 0) {
6396 SCTP_TCB_SEND_LOCK(stcb);
6398 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6399 sctp_snd_sb_alloc(stcb, sp->length);
6400 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6401 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6402 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp);
6404 if (hold_stcb_lock == 0) {
6405 SCTP_TCB_SEND_UNLOCK(stcb);
6414 static struct mbuf *
6415 sctp_copy_mbufchain(struct mbuf *clonechain,
6416 struct mbuf *outchain,
6417 struct mbuf **endofchain,
6420 uint8_t copy_by_ref)
6423 struct mbuf *appendchain;
6427 if (endofchain == NULL) {
6431 sctp_m_freem(outchain);
6434 if (can_take_mbuf) {
6435 appendchain = clonechain;
6438 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))) {
6439 /* Its not in a cluster */
6440 if (*endofchain == NULL) {
6441 /* lets get a mbuf cluster */
6442 if (outchain == NULL) {
6443 /* This is the general case */
6445 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6446 if (outchain == NULL) {
6449 SCTP_BUF_LEN(outchain) = 0;
6450 *endofchain = outchain;
6451 /* get the prepend space */
6452 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6455 * We really should not get a NULL
6461 if (SCTP_BUF_NEXT(m) == NULL) {
6465 m = SCTP_BUF_NEXT(m);
6468 if (*endofchain == NULL) {
6470 * huh, TSNH XXX maybe we
6473 sctp_m_freem(outchain);
6477 /* get the new end of length */
6478 len = (int)M_TRAILINGSPACE(*endofchain);
6480 /* how much is left at the end? */
6481 len = (int)M_TRAILINGSPACE(*endofchain);
6483 /* Find the end of the data, for appending */
6484 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6486 /* Now lets copy it out */
6487 if (len >= sizeofcpy) {
6488 /* It all fits, copy it in */
6489 m_copydata(clonechain, 0, sizeofcpy, cp);
6490 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6492 /* fill up the end of the chain */
6494 m_copydata(clonechain, 0, len, cp);
6495 SCTP_BUF_LEN((*endofchain)) += len;
6496 /* now we need another one */
6499 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6504 SCTP_BUF_NEXT((*endofchain)) = m;
6506 cp = mtod((*endofchain), caddr_t);
6507 m_copydata(clonechain, len, sizeofcpy, cp);
6508 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6512 /* copy the old fashion way */
6513 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6514 #ifdef SCTP_MBUF_LOGGING
6515 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6516 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6521 if (appendchain == NULL) {
6524 sctp_m_freem(outchain);
6528 /* tack on to the end */
6529 if (*endofchain != NULL) {
6530 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6534 if (SCTP_BUF_NEXT(m) == NULL) {
6535 SCTP_BUF_NEXT(m) = appendchain;
6538 m = SCTP_BUF_NEXT(m);
6542 * save off the end and update the end-chain position
6546 if (SCTP_BUF_NEXT(m) == NULL) {
6550 m = SCTP_BUF_NEXT(m);
6554 /* save off the end and update the end-chain position */
6557 if (SCTP_BUF_NEXT(m) == NULL) {
6561 m = SCTP_BUF_NEXT(m);
6563 return (appendchain);
6568 sctp_med_chunk_output(struct sctp_inpcb *inp,
6569 struct sctp_tcb *stcb,
6570 struct sctp_association *asoc,
6573 int control_only, int from_where,
6574 struct timeval *now, int *now_filled, int frag_point, int so_locked);
6577 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6578 uint32_t val SCTP_UNUSED)
6580 struct sctp_copy_all *ca;
6583 int added_control = 0;
6584 int un_sent, do_chunk_output = 1;
6585 struct sctp_association *asoc;
6586 struct sctp_nets *net;
6588 ca = (struct sctp_copy_all *)ptr;
6589 if (ca->m == NULL) {
6592 if (ca->inp != inp) {
6596 if (ca->sndlen > 0) {
6597 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6599 /* can't copy so we are done */
6603 #ifdef SCTP_MBUF_LOGGING
6604 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6605 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6611 SCTP_TCB_LOCK_ASSERT(stcb);
6612 if (stcb->asoc.alternate) {
6613 net = stcb->asoc.alternate;
6615 net = stcb->asoc.primary_destination;
6617 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6618 /* Abort this assoc with m as the user defined reason */
6620 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6622 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6623 0, M_NOWAIT, 1, MT_DATA);
6624 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6627 struct sctp_paramhdr *ph;
6629 ph = mtod(m, struct sctp_paramhdr *);
6630 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6631 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6634 * We add one here to keep the assoc from dis-appearing on
6637 atomic_add_int(&stcb->asoc.refcnt, 1);
6638 sctp_abort_an_association(inp, stcb, m, false, SCTP_SO_NOT_LOCKED);
6640 * sctp_abort_an_association calls sctp_free_asoc() free
6641 * association will NOT free it since we incremented the
6642 * refcnt .. we do this to prevent it being freed and things
6643 * getting tricky since we could end up (from free_asoc)
6644 * calling inpcb_free which would get a recursive lock call
6645 * to the iterator lock.. But as a consequence of that the
6646 * stcb will return to us un-locked.. since free_asoc
6647 * returns with either no TCB or the TCB unlocked, we must
6648 * relock.. to unlock in the iterator timer :-0
6650 SCTP_TCB_LOCK(stcb);
6651 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6652 goto no_chunk_output;
6655 ret = sctp_msg_append(stcb, net, m,
6659 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6660 /* shutdown this assoc */
6661 if (TAILQ_EMPTY(&asoc->send_queue) &&
6662 TAILQ_EMPTY(&asoc->sent_queue) &&
6663 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6664 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6668 * there is nothing queued to send, so I'm
6671 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6672 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6673 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6675 * only send SHUTDOWN the first time
6678 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6679 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6681 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6682 sctp_stop_timers_for_shutdown(stcb);
6683 sctp_send_shutdown(stcb, net);
6684 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6686 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6689 do_chunk_output = 0;
6693 * we still got (or just got) data to send,
6694 * so set SHUTDOWN_PENDING
6697 * XXX sockets draft says that SCTP_EOF
6698 * should be sent with no data. currently,
6699 * we will allow user data to be sent first
6700 * and move to SHUTDOWN-PENDING
6702 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6703 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6704 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6705 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6706 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6708 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6709 if (TAILQ_EMPTY(&asoc->send_queue) &&
6710 TAILQ_EMPTY(&asoc->sent_queue) &&
6711 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6712 struct mbuf *op_err;
6713 char msg[SCTP_DIAG_INFO_LEN];
6716 SCTP_SNPRINTF(msg, sizeof(msg),
6717 "%s:%d at %s", __FILE__, __LINE__, __func__);
6718 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6720 atomic_add_int(&stcb->asoc.refcnt, 1);
6721 sctp_abort_an_association(stcb->sctp_ep, stcb,
6722 op_err, false, SCTP_SO_NOT_LOCKED);
6723 atomic_subtract_int(&stcb->asoc.refcnt, 1);
6724 goto no_chunk_output;
6726 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6732 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6733 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6735 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6736 (stcb->asoc.total_flight > 0) &&
6737 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6738 do_chunk_output = 0;
6740 if (do_chunk_output)
6741 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6742 else if (added_control) {
6743 int num_out, reason, now_filled = 0;
6747 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6748 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6749 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6760 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6762 struct sctp_copy_all *ca;
6764 ca = (struct sctp_copy_all *)ptr;
6766 * Do a notify here? Kacheong suggests that the notify be done at
6767 * the send time.. so you would push up a notification if any send
6768 * failed. Don't know if this is feasible since the only failures we
6769 * have is "memory" related and if you cannot get an mbuf to send
6770 * the data you surely can't get an mbuf to send up to notify the
6771 * user you can't send the data :->
6774 /* now free everything */
6776 /* Lets clear the flag to allow others to run. */
6777 SCTP_INP_WLOCK(ca->inp);
6778 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6779 SCTP_INP_WUNLOCK(ca->inp);
6781 sctp_m_freem(ca->m);
6782 SCTP_FREE(ca, SCTP_M_COPYAL);
6785 static struct mbuf *
6786 sctp_copy_out_all(struct uio *uio, ssize_t len)
6788 struct mbuf *ret, *at;
6789 ssize_t left, willcpy, cancpy, error;
6791 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6797 SCTP_BUF_LEN(ret) = 0;
6798 /* save space for the data chunk header */
6799 cancpy = (int)M_TRAILINGSPACE(ret);
6800 willcpy = min(cancpy, left);
6803 /* Align data to the end */
6804 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6810 SCTP_BUF_LEN(at) = (int)willcpy;
6811 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6814 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6815 if (SCTP_BUF_NEXT(at) == NULL) {
6818 at = SCTP_BUF_NEXT(at);
6819 SCTP_BUF_LEN(at) = 0;
6820 cancpy = (int)M_TRAILINGSPACE(at);
6821 willcpy = min(cancpy, left);
6828 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6829 struct sctp_sndrcvinfo *srcv)
6832 struct sctp_copy_all *ca;
6834 if (uio->uio_resid > (ssize_t)SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
6835 /* You must not be larger than the limit! */
6838 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6842 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6845 memset(ca, 0, sizeof(struct sctp_copy_all));
6849 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6853 SCTP_INP_WLOCK(inp);
6854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) != 0) {
6855 SCTP_INP_WUNLOCK(inp);
6857 SCTP_FREE(ca, SCTP_M_COPYAL);
6860 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6861 SCTP_INP_WUNLOCK(inp);
6864 * take off the sendall flag, it would be bad if we failed to do
6867 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6868 /* get length and mbuf chain */
6870 ca->sndlen = uio->uio_resid;
6871 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6872 if (ca->m == NULL) {
6873 SCTP_FREE(ca, SCTP_M_COPYAL);
6875 SCTP_INP_WLOCK(inp);
6876 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6877 SCTP_INP_WUNLOCK(inp);
6878 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6882 /* Gather the length of the send */
6886 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6887 ca->sndlen += SCTP_BUF_LEN(mat);
6890 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6891 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6892 SCTP_ASOC_ANY_STATE,
6894 sctp_sendall_completes, inp, 1);
6896 SCTP_INP_WLOCK(inp);
6897 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6898 SCTP_INP_WUNLOCK(inp);
6899 SCTP_FREE(ca, SCTP_M_COPYAL);
6900 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6907 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6909 struct sctp_tmit_chunk *chk, *nchk;
6911 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6912 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6913 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6914 asoc->ctrl_queue_cnt--;
6916 sctp_m_freem(chk->data);
6919 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6925 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6927 struct sctp_association *asoc;
6928 struct sctp_tmit_chunk *chk, *nchk;
6929 struct sctp_asconf_chunk *acp;
6932 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6933 /* find SCTP_ASCONF chunk in queue */
6934 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6936 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6937 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6942 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6943 asoc->ctrl_queue_cnt--;
6945 sctp_m_freem(chk->data);
6948 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6954 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6955 struct sctp_association *asoc,
6956 struct sctp_tmit_chunk **data_list,
6958 struct sctp_nets *net)
6961 struct sctp_tmit_chunk *tp1;
6963 for (i = 0; i < bundle_at; i++) {
6964 /* off of the send queue */
6965 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6966 asoc->send_queue_cnt--;
6969 * Any chunk NOT 0 you zap the time chunk 0 gets
6970 * zapped or set based on if a RTO measurment is
6973 data_list[i]->do_rtt = 0;
6976 data_list[i]->sent_rcv_time = net->last_sent_time;
6977 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6978 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6979 if (data_list[i]->whoTo == NULL) {
6980 data_list[i]->whoTo = net;
6981 atomic_add_int(&net->ref_count, 1);
6983 /* on to the sent queue */
6984 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6985 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6986 struct sctp_tmit_chunk *tpp;
6988 /* need to move back */
6990 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6992 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6996 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6999 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7001 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7006 /* This does not lower until the cum-ack passes it */
7007 asoc->sent_queue_cnt++;
7008 if ((asoc->peers_rwnd <= 0) &&
7009 (asoc->total_flight == 0) &&
7011 /* Mark the chunk as being a window probe */
7012 SCTP_STAT_INCR(sctps_windowprobed);
7014 #ifdef SCTP_AUDITING_ENABLED
7015 sctp_audit_log(0xC2, 3);
7017 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7018 data_list[i]->snd_count = 1;
7019 data_list[i]->rec.data.chunk_was_revoked = 0;
7020 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7021 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7022 data_list[i]->whoTo->flight_size,
7023 data_list[i]->book_size,
7024 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7025 data_list[i]->rec.data.tsn);
7027 sctp_flight_size_increase(data_list[i]);
7028 sctp_total_flight_increase(stcb, data_list[i]);
7029 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7030 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7031 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7033 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7034 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7035 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7036 /* SWS sender side engages */
7037 asoc->peers_rwnd = 0;
7040 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7041 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7046 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked)
7048 struct sctp_tmit_chunk *chk, *nchk;
7050 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7051 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7052 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7053 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7054 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7055 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7056 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7057 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7058 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7059 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7060 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7061 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7062 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7063 /* Stray chunks must be cleaned up */
7065 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7066 asoc->ctrl_queue_cnt--;
7068 sctp_m_freem(chk->data);
7071 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7072 asoc->fwd_tsn_cnt--;
7074 sctp_free_a_chunk(stcb, chk, so_locked);
7075 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7076 /* special handling, we must look into the param */
7077 if (chk != asoc->str_reset) {
7078 goto clean_up_anyway;
7085 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7086 uint32_t space_left, uint32_t frag_point, int eeor_on)
7089 * Make a decision on if I should split a msg into multiple parts.
7090 * This is only asked of incomplete messages.
7094 * If we are doing EEOR we need to always send it if its the
7095 * entire thing, since it might be all the guy is putting in
7098 if (space_left >= length) {
7100 * If we have data outstanding,
7101 * we get another chance when the sack
7102 * arrives to transmit - wait for more data
7104 if (stcb->asoc.total_flight == 0) {
7106 * If nothing is in flight, we zero the
7114 /* You can fill the rest */
7115 return (space_left);
7119 * For those strange folk that make the send buffer
7120 * smaller than our fragmentation point, we can't
7121 * get a full msg in so we have to allow splitting.
7123 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7126 if ((length <= space_left) ||
7127 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7128 /* Sub-optimial residual don't split in non-eeor mode. */
7132 * If we reach here length is larger than the space_left. Do we wish
7133 * to split it for the sake of packet putting together?
7135 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7136 /* Its ok to split it */
7137 return (min(space_left, frag_point));
7139 /* Nope, can't split */
7144 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7145 struct sctp_nets *net,
7146 struct sctp_stream_out *strq,
7147 uint32_t space_left,
7148 uint32_t frag_point,
7154 /* Move from the stream to the send_queue keeping track of the total */
7155 struct sctp_association *asoc;
7156 struct sctp_stream_queue_pending *sp;
7157 struct sctp_tmit_chunk *chk;
7158 struct sctp_data_chunk *dchkh = NULL;
7159 struct sctp_idata_chunk *ndchkh = NULL;
7160 uint32_t to_move, length;
7162 uint8_t rcv_flags = 0;
7164 uint8_t send_lock_up = 0;
7166 SCTP_TCB_LOCK_ASSERT(stcb);
7169 /* sa_ignore FREED_MEMORY */
7170 sp = TAILQ_FIRST(&strq->outqueue);
7172 if (send_lock_up == 0) {
7173 SCTP_TCB_SEND_LOCK(stcb);
7176 sp = TAILQ_FIRST(&strq->outqueue);
7180 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7181 (stcb->asoc.idata_supported == 0) &&
7182 (strq->last_msg_incomplete)) {
7183 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7185 strq->last_msg_incomplete);
7186 strq->last_msg_incomplete = 0;
7190 SCTP_TCB_SEND_UNLOCK(stcb);
7195 if ((sp->msg_is_complete) && (sp->length == 0)) {
7196 if (sp->sender_all_done) {
7198 * We are doing deferred cleanup. Last time through
7199 * when we took all the data the sender_all_done was
7202 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7203 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7204 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7205 sp->sender_all_done,
7207 sp->msg_is_complete,
7211 if (send_lock_up == 0) {
7212 SCTP_TCB_SEND_LOCK(stcb);
7215 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7216 TAILQ_REMOVE(&strq->outqueue, sp, next);
7217 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
7218 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7219 (strq->chunks_on_queues == 0) &&
7220 TAILQ_EMPTY(&strq->outqueue)) {
7221 stcb->asoc.trigger_reset = 1;
7224 sctp_free_remote_addr(sp->net);
7228 sctp_m_freem(sp->data);
7231 sctp_free_a_strmoq(stcb, sp, so_locked);
7232 /* we can't be locked to it */
7234 SCTP_TCB_SEND_UNLOCK(stcb);
7237 /* back to get the next msg */
7241 * sender just finished this but still holds a
7249 /* is there some to get */
7250 if (sp->length == 0) {
7255 } else if (sp->discard_rest) {
7256 if (send_lock_up == 0) {
7257 SCTP_TCB_SEND_LOCK(stcb);
7260 /* Whack down the size */
7261 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7262 if ((stcb->sctp_socket != NULL) &&
7263 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7264 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7265 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7268 sctp_m_freem(sp->data);
7270 sp->tail_mbuf = NULL;
7279 some_taken = sp->some_taken;
7281 length = sp->length;
7282 if (sp->msg_is_complete) {
7283 /* The message is complete */
7284 to_move = min(length, frag_point);
7285 if (to_move == length) {
7286 /* All of it fits in the MTU */
7287 if (sp->some_taken) {
7288 rcv_flags |= SCTP_DATA_LAST_FRAG;
7290 rcv_flags |= SCTP_DATA_NOT_FRAG;
7292 sp->put_last_out = 1;
7293 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7294 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7297 /* Not all of it fits, we fragment */
7298 if (sp->some_taken == 0) {
7299 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7304 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7307 * We use a snapshot of length in case it
7308 * is expanding during the compare.
7313 if (to_move >= llen) {
7315 if (send_lock_up == 0) {
7317 * We are taking all of an incomplete msg
7318 * thus we need a send lock.
7320 SCTP_TCB_SEND_LOCK(stcb);
7322 if (sp->msg_is_complete) {
7324 * the sender finished the
7331 if (sp->some_taken == 0) {
7332 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7336 /* Nothing to take. */
7343 /* If we reach here, we can copy out a chunk */
7344 sctp_alloc_a_chunk(stcb, chk);
7346 /* No chunk memory */
7352 * Setup for unordered if needed by looking at the user sent info
7355 if (sp->sinfo_flags & SCTP_UNORDERED) {
7356 rcv_flags |= SCTP_DATA_UNORDERED;
7358 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7359 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7360 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7362 /* clear out the chunk before setting up */
7363 memset(chk, 0, sizeof(*chk));
7364 chk->rec.data.rcv_flags = rcv_flags;
7366 if (to_move >= length) {
7367 /* we think we can steal the whole thing */
7368 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7369 SCTP_TCB_SEND_LOCK(stcb);
7372 if (to_move < sp->length) {
7373 /* bail, it changed */
7376 chk->data = sp->data;
7377 chk->last_mbuf = sp->tail_mbuf;
7378 /* register the stealing */
7379 sp->data = sp->tail_mbuf = NULL;
7384 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7385 chk->last_mbuf = NULL;
7386 if (chk->data == NULL) {
7387 sp->some_taken = some_taken;
7388 sctp_free_a_chunk(stcb, chk, so_locked);
7393 #ifdef SCTP_MBUF_LOGGING
7394 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7395 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7398 /* Pull off the data */
7399 m_adj(sp->data, to_move);
7400 /* Now lets work our way down and compact it */
7402 while (m && (SCTP_BUF_LEN(m) == 0)) {
7403 sp->data = SCTP_BUF_NEXT(m);
7404 SCTP_BUF_NEXT(m) = NULL;
7405 if (sp->tail_mbuf == m) {
7407 * Freeing tail? TSNH since
7408 * we supposedly were taking less
7409 * than the sp->length.
7412 panic("Huh, freing tail? - TSNH");
7414 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7415 sp->tail_mbuf = sp->data = NULL;
7423 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7424 chk->copy_by_ref = 1;
7426 chk->copy_by_ref = 0;
7429 * get last_mbuf and counts of mb usage This is ugly but hopefully
7430 * its only one mbuf.
7432 if (chk->last_mbuf == NULL) {
7433 chk->last_mbuf = chk->data;
7434 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7435 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7439 if (to_move > length) {
7440 /*- This should not happen either
7441 * since we always lower to_move to the size
7442 * of sp->length if its larger.
7445 panic("Huh, how can to_move be larger?");
7447 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7451 atomic_subtract_int(&sp->length, to_move);
7453 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7454 if (M_LEADINGSPACE(chk->data) < leading) {
7455 /* Not enough room for a chunk header, get some */
7458 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7461 * we're in trouble here. _PREPEND below will free
7462 * all the data if there is no leading space, so we
7463 * must put the data back and restore.
7465 if (send_lock_up == 0) {
7466 SCTP_TCB_SEND_LOCK(stcb);
7469 if (sp->data == NULL) {
7470 /* unsteal the data */
7471 sp->data = chk->data;
7472 sp->tail_mbuf = chk->last_mbuf;
7476 /* reassemble the data */
7478 sp->data = chk->data;
7479 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7481 sp->some_taken = some_taken;
7482 atomic_add_int(&sp->length, to_move);
7485 sctp_free_a_chunk(stcb, chk, so_locked);
7489 SCTP_BUF_LEN(m) = 0;
7490 SCTP_BUF_NEXT(m) = chk->data;
7492 M_ALIGN(chk->data, 4);
7495 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7496 if (chk->data == NULL) {
7497 /* HELP, TSNH since we assured it would not above? */
7499 panic("prepend failes HELP?");
7501 SCTP_PRINTF("prepend fails HELP?\n");
7502 sctp_free_a_chunk(stcb, chk, so_locked);
7508 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7509 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7510 chk->book_size_scale = 0;
7511 chk->sent = SCTP_DATAGRAM_UNSENT;
7514 chk->asoc = &stcb->asoc;
7515 chk->pad_inplace = 0;
7516 chk->no_fr_allowed = 0;
7517 if (stcb->asoc.idata_supported == 0) {
7518 if (rcv_flags & SCTP_DATA_UNORDERED) {
7519 /* Just use 0. The receiver ignores the values. */
7520 chk->rec.data.mid = 0;
7522 chk->rec.data.mid = strq->next_mid_ordered;
7523 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7524 strq->next_mid_ordered++;
7528 if (rcv_flags & SCTP_DATA_UNORDERED) {
7529 chk->rec.data.mid = strq->next_mid_unordered;
7530 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7531 strq->next_mid_unordered++;
7534 chk->rec.data.mid = strq->next_mid_ordered;
7535 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7536 strq->next_mid_ordered++;
7540 chk->rec.data.sid = sp->sid;
7541 chk->rec.data.ppid = sp->ppid;
7542 chk->rec.data.context = sp->context;
7543 chk->rec.data.doing_fast_retransmit = 0;
7545 chk->rec.data.timetodrop = sp->ts;
7546 chk->flags = sp->act_flags;
7549 chk->whoTo = sp->net;
7550 atomic_add_int(&chk->whoTo->ref_count, 1);
7554 if (sp->holds_key_ref) {
7555 chk->auth_keyid = sp->auth_keyid;
7556 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7557 chk->holds_key_ref = 1;
7559 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, to_move);
7560 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7561 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7562 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7563 (uint32_t)(uintptr_t)stcb, sp->length,
7564 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7567 if (stcb->asoc.idata_supported == 0) {
7568 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7570 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7573 * Put the rest of the things in place now. Size was done earlier in
7574 * previous loop prior to padding.
7577 #ifdef SCTP_ASOCLOG_OF_TSNS
7578 SCTP_TCB_LOCK_ASSERT(stcb);
7579 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7580 asoc->tsn_out_at = 0;
7581 asoc->tsn_out_wrapped = 1;
7583 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7584 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7585 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7586 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7587 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7588 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7589 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7590 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7593 if (stcb->asoc.idata_supported == 0) {
7594 dchkh->ch.chunk_type = SCTP_DATA;
7595 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7596 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7597 dchkh->dp.sid = htons(strq->sid);
7598 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7599 dchkh->dp.ppid = chk->rec.data.ppid;
7600 dchkh->ch.chunk_length = htons(chk->send_size);
7602 ndchkh->ch.chunk_type = SCTP_IDATA;
7603 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7604 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7605 ndchkh->dp.sid = htons(strq->sid);
7606 ndchkh->dp.reserved = htons(0);
7607 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7609 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7611 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7613 ndchkh->ch.chunk_length = htons(chk->send_size);
7615 /* Now advance the chk->send_size by the actual pad needed. */
7616 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7621 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7622 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7624 chk->last_mbuf = lm;
7625 chk->pad_inplace = 1;
7627 chk->send_size += pads;
7629 if (PR_SCTP_ENABLED(chk->flags)) {
7630 asoc->pr_sctp_cnt++;
7632 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7633 /* All done pull and kill the message */
7634 if (sp->put_last_out == 0) {
7635 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7636 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7637 sp->sender_all_done,
7639 sp->msg_is_complete,
7643 if (send_lock_up == 0) {
7644 SCTP_TCB_SEND_LOCK(stcb);
7647 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7648 TAILQ_REMOVE(&strq->outqueue, sp, next);
7649 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp);
7650 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7651 (strq->chunks_on_queues == 0) &&
7652 TAILQ_EMPTY(&strq->outqueue)) {
7653 stcb->asoc.trigger_reset = 1;
7656 sctp_free_remote_addr(sp->net);
7660 sctp_m_freem(sp->data);
7663 sctp_free_a_strmoq(stcb, sp, so_locked);
7665 asoc->chunks_on_out_queue++;
7666 strq->chunks_on_queues++;
7667 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7668 asoc->send_queue_cnt++;
7671 SCTP_TCB_SEND_UNLOCK(stcb);
7677 sctp_fill_outqueue(struct sctp_tcb *stcb, struct sctp_nets *net, int frag_point,
7678 int eeor_mode, int *quit_now, int so_locked)
7680 struct sctp_association *asoc;
7681 struct sctp_stream_out *strq;
7682 uint32_t space_left, moved, total_moved;
7685 SCTP_TCB_LOCK_ASSERT(stcb);
7688 switch (net->ro._l_addr.sa.sa_family) {
7691 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7696 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7701 space_left = net->mtu;
7704 /* Need an allowance for the data chunk header too */
7705 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7707 /* must make even word boundary */
7708 space_left &= 0xfffffffc;
7709 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7712 while ((space_left > 0) && (strq != NULL)) {
7713 moved = sctp_move_to_outqueue(stcb, net, strq, space_left,
7714 frag_point, &giveup, eeor_mode,
7716 if ((giveup != 0) || (bail != 0)) {
7719 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7720 total_moved += moved;
7721 if (space_left >= moved) {
7722 space_left -= moved;
7726 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7727 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7731 space_left &= 0xfffffffc;
7736 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7738 if (total_moved == 0) {
7739 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7740 (net == stcb->asoc.primary_destination)) {
7741 /* ran dry for primary network net */
7742 SCTP_STAT_INCR(sctps_primary_randry);
7743 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7744 /* ran dry with CMT on */
7745 SCTP_STAT_INCR(sctps_cmt_randry);
7751 sctp_fix_ecn_echo(struct sctp_association *asoc)
7753 struct sctp_tmit_chunk *chk;
7755 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7756 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7757 chk->sent = SCTP_DATAGRAM_UNSENT;
7763 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7765 struct sctp_association *asoc;
7766 struct sctp_tmit_chunk *chk;
7767 struct sctp_stream_queue_pending *sp;
7774 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7775 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7776 if (sp->net == net) {
7777 sctp_free_remote_addr(sp->net);
7782 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7783 if (chk->whoTo == net) {
7784 sctp_free_remote_addr(chk->whoTo);
7791 sctp_med_chunk_output(struct sctp_inpcb *inp,
7792 struct sctp_tcb *stcb,
7793 struct sctp_association *asoc,
7796 int control_only, int from_where,
7797 struct timeval *now, int *now_filled, int frag_point, int so_locked)
7800 * Ok this is the generic chunk service queue. we must do the
7802 * - Service the stream queue that is next, moving any
7803 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7804 * LAST to the out queue in one pass) and assigning TSN's. This
7805 * only applys though if the peer does not support NDATA. For NDATA
7806 * chunks its ok to not send the entire message ;-)
7807 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7808 * fomulate and send the low level chunks. Making sure to combine
7809 * any control in the control chunk queue also.
7811 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7812 struct mbuf *outchain, *endoutchain;
7813 struct sctp_tmit_chunk *chk, *nchk;
7815 /* temp arrays for unlinking */
7816 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7817 int no_fragmentflg, error;
7818 unsigned int max_rwnd_per_dest, max_send_per_dest;
7819 int one_chunk, hbflag, skip_data_for_this_net;
7820 int asconf, cookie, no_out_cnt;
7821 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7822 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7824 uint32_t auth_offset;
7825 struct sctp_auth_chunk *auth;
7826 uint16_t auth_keyid;
7827 int override_ok = 1;
7828 int skip_fill_up = 0;
7829 int data_auth_reqd = 0;
7832 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7839 auth_keyid = stcb->asoc.authinfo.active_keyid;
7840 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7841 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7842 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7847 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7849 * First lets prime the pump. For each destination, if there is room
7850 * in the flight size, attempt to pull an MTU's worth out of the
7851 * stream queues into the general send_queue
7853 #ifdef SCTP_AUDITING_ENABLED
7854 sctp_audit_log(0xC2, 2);
7856 SCTP_TCB_LOCK_ASSERT(stcb);
7863 /* Nothing to possible to send? */
7864 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7865 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7866 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7867 TAILQ_EMPTY(&asoc->send_queue) &&
7868 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7873 if (asoc->peers_rwnd == 0) {
7874 /* No room in peers rwnd */
7876 if (asoc->total_flight > 0) {
7877 /* we are allowed one chunk in flight */
7881 if (stcb->asoc.ecn_echo_cnt_onq) {
7882 /* Record where a sack goes, if any */
7883 if (no_data_chunks &&
7884 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7885 /* Nothing but ECNe to send - we don't do that */
7886 goto nothing_to_send;
7888 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7889 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7890 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7891 sack_goes_to = chk->whoTo;
7896 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7897 if (stcb->sctp_socket)
7898 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7900 max_send_per_dest = 0;
7901 if (no_data_chunks == 0) {
7902 /* How many non-directed chunks are there? */
7903 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7904 if (chk->whoTo == NULL) {
7906 * We already have non-directed chunks on
7907 * the queue, no need to do a fill-up.
7914 if ((no_data_chunks == 0) &&
7915 (skip_fill_up == 0) &&
7916 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7917 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7919 * This for loop we are in takes in each net, if
7920 * its's got space in cwnd and has data sent to it
7921 * (when CMT is off) then it calls
7922 * sctp_fill_outqueue for the net. This gets data on
7923 * the send queue for that network.
7925 * In sctp_fill_outqueue TSN's are assigned and data
7926 * is copied out of the stream buffers. Note mostly
7927 * copy by reference (we hope).
7929 net->window_probe = 0;
7930 if ((net != stcb->asoc.alternate) &&
7931 ((net->dest_state & SCTP_ADDR_PF) ||
7932 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7933 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7934 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7935 sctp_log_cwnd(stcb, net, 1,
7936 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7940 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7941 (net->flight_size == 0)) {
7942 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7944 if (net->flight_size >= net->cwnd) {
7945 /* skip this network, no room - can't fill */
7946 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7947 sctp_log_cwnd(stcb, net, 3,
7948 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7952 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7953 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7955 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7957 /* memory alloc failure */
7963 /* now service each destination and send out what we can for it */
7964 /* Nothing to send? */
7965 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7966 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7967 TAILQ_EMPTY(&asoc->send_queue)) {
7972 if (asoc->sctp_cmt_on_off > 0) {
7973 /* get the last start point */
7974 start_at = asoc->last_net_cmt_send_started;
7975 if (start_at == NULL) {
7976 /* null so to beginning */
7977 start_at = TAILQ_FIRST(&asoc->nets);
7979 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7980 if (start_at == NULL) {
7981 start_at = TAILQ_FIRST(&asoc->nets);
7984 asoc->last_net_cmt_send_started = start_at;
7986 start_at = TAILQ_FIRST(&asoc->nets);
7988 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7989 if (chk->whoTo == NULL) {
7990 if (asoc->alternate) {
7991 chk->whoTo = asoc->alternate;
7993 chk->whoTo = asoc->primary_destination;
7995 atomic_add_int(&chk->whoTo->ref_count, 1);
7998 old_start_at = NULL;
7999 again_one_more_time:
8000 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8001 /* how much can we send? */
8002 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8003 if (old_start_at && (old_start_at == net)) {
8004 /* through list ocmpletely. */
8008 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8009 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8010 (net->flight_size >= net->cwnd)) {
8012 * Nothing on control or asconf and flight is full,
8013 * we can skip even in the CMT case.
8018 endoutchain = outchain = NULL;
8023 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8024 skip_data_for_this_net = 1;
8026 skip_data_for_this_net = 0;
8028 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8031 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8036 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8046 if (mtu > asoc->peers_rwnd) {
8047 if (asoc->total_flight > 0) {
8048 /* We have a packet in flight somewhere */
8049 r_mtu = asoc->peers_rwnd;
8051 /* We are always allowed to send one MTU out */
8059 /************************/
8060 /* ASCONF transmission */
8061 /************************/
8062 /* Now first lets go through the asconf queue */
8063 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8064 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8067 if (chk->whoTo == NULL) {
8068 if (asoc->alternate == NULL) {
8069 if (asoc->primary_destination != net) {
8073 if (asoc->alternate != net) {
8078 if (chk->whoTo != net) {
8082 if (chk->data == NULL) {
8085 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8086 chk->sent != SCTP_DATAGRAM_RESEND) {
8090 * if no AUTH is yet included and this chunk
8091 * requires it, make sure to account for it. We
8092 * don't apply the size until the AUTH chunk is
8093 * actually added below in case there is no room for
8094 * this chunk. NOTE: we overload the use of "omtu"
8097 if ((auth == NULL) &&
8098 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8099 stcb->asoc.peer_auth_chunks)) {
8100 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8103 /* Here we do NOT factor the r_mtu */
8104 if ((chk->send_size < (int)(mtu - omtu)) ||
8105 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8107 * We probably should glom the mbuf chain
8108 * from the chk->data for control but the
8109 * problem is it becomes yet one more level
8110 * of tracking to do if for some reason
8111 * output fails. Then I have got to
8112 * reconstruct the merged control chain.. el
8113 * yucko.. for now we take the easy way and
8117 * Add an AUTH chunk, if chunk requires it
8118 * save the offset into the chain for AUTH
8120 if ((auth == NULL) &&
8121 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8122 stcb->asoc.peer_auth_chunks))) {
8123 outchain = sctp_add_auth_chunk(outchain,
8128 chk->rec.chunk_id.id);
8129 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8131 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8132 (int)chk->rec.chunk_id.can_take_data,
8133 chk->send_size, chk->copy_by_ref);
8134 if (outchain == NULL) {
8136 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8139 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8140 /* update our MTU size */
8141 if (mtu > (chk->send_size + omtu))
8142 mtu -= (chk->send_size + omtu);
8145 to_out += (chk->send_size + omtu);
8146 /* Do clear IP_DF ? */
8147 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8150 if (chk->rec.chunk_id.can_take_data)
8153 * set hb flag since we can use these for
8159 * should sysctl this: don't bundle data
8160 * with ASCONF since it requires AUTH
8163 chk->sent = SCTP_DATAGRAM_SENT;
8164 if (chk->whoTo == NULL) {
8166 atomic_add_int(&net->ref_count, 1);
8171 * Ok we are out of room but we can
8172 * output without effecting the
8173 * flight size since this little guy
8174 * is a control only packet.
8176 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8178 * do NOT clear the asconf flag as
8179 * it is used to do appropriate
8180 * source address selection.
8182 if (*now_filled == 0) {
8183 (void)SCTP_GETTIME_TIMEVAL(now);
8186 net->last_sent_time = *now;
8188 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8189 (struct sockaddr *)&net->ro._l_addr,
8190 outchain, auth_offset, auth,
8191 stcb->asoc.authinfo.active_keyid,
8192 no_fragmentflg, 0, asconf,
8193 inp->sctp_lport, stcb->rport,
8194 htonl(stcb->asoc.peer_vtag),
8199 * error, we could not
8202 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8203 if (from_where == 0) {
8204 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8206 if (error == ENOBUFS) {
8207 asoc->ifp_had_enobuf = 1;
8208 SCTP_STAT_INCR(sctps_lowlevelerr);
8210 /* error, could not output */
8211 if (error == EHOSTUNREACH) {
8217 sctp_move_chunks_from_net(stcb, net);
8222 asoc->ifp_had_enobuf = 0;
8225 * increase the number we sent, if a
8226 * cookie is sent we don't tell them
8229 outchain = endoutchain = NULL;
8233 *num_out += ctl_cnt;
8234 /* recalc a clean slate and setup */
8235 switch (net->ro._l_addr.sa.sa_family) {
8238 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8243 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8260 /************************/
8261 /* Control transmission */
8262 /************************/
8263 /* Now first lets go through the control queue */
8264 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8265 if ((sack_goes_to) &&
8266 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8267 (chk->whoTo != sack_goes_to)) {
8269 * if we have a sack in queue, and we are
8270 * looking at an ecn echo that is NOT queued
8271 * to where the sack is going..
8273 if (chk->whoTo == net) {
8275 * Don't transmit it to where its
8276 * going (current net)
8279 } else if (sack_goes_to == net) {
8281 * But do transmit it to this
8284 goto skip_net_check;
8287 if (chk->whoTo == NULL) {
8288 if (asoc->alternate == NULL) {
8289 if (asoc->primary_destination != net) {
8293 if (asoc->alternate != net) {
8298 if (chk->whoTo != net) {
8303 if (chk->data == NULL) {
8306 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8308 * It must be unsent. Cookies and ASCONF's
8309 * hang around but there timers will force
8310 * when marked for resend.
8315 * if no AUTH is yet included and this chunk
8316 * requires it, make sure to account for it. We
8317 * don't apply the size until the AUTH chunk is
8318 * actually added below in case there is no room for
8319 * this chunk. NOTE: we overload the use of "omtu"
8322 if ((auth == NULL) &&
8323 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8324 stcb->asoc.peer_auth_chunks)) {
8325 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8328 /* Here we do NOT factor the r_mtu */
8329 if ((chk->send_size <= (int)(mtu - omtu)) ||
8330 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8332 * We probably should glom the mbuf chain
8333 * from the chk->data for control but the
8334 * problem is it becomes yet one more level
8335 * of tracking to do if for some reason
8336 * output fails. Then I have got to
8337 * reconstruct the merged control chain.. el
8338 * yucko.. for now we take the easy way and
8342 * Add an AUTH chunk, if chunk requires it
8343 * save the offset into the chain for AUTH
8345 if ((auth == NULL) &&
8346 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8347 stcb->asoc.peer_auth_chunks))) {
8348 outchain = sctp_add_auth_chunk(outchain,
8353 chk->rec.chunk_id.id);
8354 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8356 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8357 (int)chk->rec.chunk_id.can_take_data,
8358 chk->send_size, chk->copy_by_ref);
8359 if (outchain == NULL) {
8361 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8364 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8365 /* update our MTU size */
8366 if (mtu > (chk->send_size + omtu))
8367 mtu -= (chk->send_size + omtu);
8370 to_out += (chk->send_size + omtu);
8371 /* Do clear IP_DF ? */
8372 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8375 if (chk->rec.chunk_id.can_take_data)
8377 /* Mark things to be removed, if needed */
8378 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8379 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8380 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8381 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8382 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8383 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8384 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8385 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8386 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8387 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8388 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8389 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8392 /* remove these chunks at the end */
8393 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8394 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8395 /* turn off the timer */
8396 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8397 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8399 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8405 * Other chunks, since they have
8406 * timers running (i.e. COOKIE) we
8407 * just "trust" that it gets sent or
8411 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8414 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8416 * Increment ecne send count
8417 * here this means we may be
8418 * over-zealous in our
8419 * counting if the send
8420 * fails, but its the best
8421 * place to do it (we used
8422 * to do it in the queue of
8423 * the chunk, but that did
8424 * not tell how many times
8427 SCTP_STAT_INCR(sctps_sendecne);
8429 chk->sent = SCTP_DATAGRAM_SENT;
8430 if (chk->whoTo == NULL) {
8432 atomic_add_int(&net->ref_count, 1);
8438 * Ok we are out of room but we can
8439 * output without effecting the
8440 * flight size since this little guy
8441 * is a control only packet.
8444 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8446 * do NOT clear the asconf
8447 * flag as it is used to do
8448 * appropriate source
8449 * address selection.
8453 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8456 /* Only HB or ASCONF advances time */
8458 if (*now_filled == 0) {
8459 (void)SCTP_GETTIME_TIMEVAL(now);
8462 net->last_sent_time = *now;
8465 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8466 (struct sockaddr *)&net->ro._l_addr,
8469 stcb->asoc.authinfo.active_keyid,
8470 no_fragmentflg, 0, asconf,
8471 inp->sctp_lport, stcb->rport,
8472 htonl(stcb->asoc.peer_vtag),
8477 * error, we could not
8480 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8481 if (from_where == 0) {
8482 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8484 if (error == ENOBUFS) {
8485 asoc->ifp_had_enobuf = 1;
8486 SCTP_STAT_INCR(sctps_lowlevelerr);
8488 if (error == EHOSTUNREACH) {
8494 sctp_move_chunks_from_net(stcb, net);
8499 asoc->ifp_had_enobuf = 0;
8502 * increase the number we sent, if a
8503 * cookie is sent we don't tell them
8506 outchain = endoutchain = NULL;
8510 *num_out += ctl_cnt;
8511 /* recalc a clean slate and setup */
8512 switch (net->ro._l_addr.sa.sa_family) {
8515 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8520 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8537 /* JRI: if dest is in PF state, do not send data to it */
8538 if ((asoc->sctp_cmt_on_off > 0) &&
8539 (net != stcb->asoc.alternate) &&
8540 (net->dest_state & SCTP_ADDR_PF)) {
8543 if (net->flight_size >= net->cwnd) {
8546 if ((asoc->sctp_cmt_on_off > 0) &&
8547 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8548 (net->flight_size > max_rwnd_per_dest)) {
8552 * We need a specific accounting for the usage of the send
8553 * buffer. We also need to check the number of messages per
8554 * net. For now, this is better than nothing and it disabled
8557 if ((asoc->sctp_cmt_on_off > 0) &&
8558 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8559 (max_send_per_dest > 0) &&
8560 (net->flight_size > max_send_per_dest)) {
8563 /*********************/
8564 /* Data transmission */
8565 /*********************/
8567 * if AUTH for DATA is required and no AUTH has been added
8568 * yet, account for this in the mtu now... if no data can be
8569 * bundled, this adjustment won't matter anyways since the
8570 * packet will be going out...
8572 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8573 stcb->asoc.peer_auth_chunks);
8574 if (data_auth_reqd && (auth == NULL)) {
8575 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8577 /* now lets add any data within the MTU constraints */
8578 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8581 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8582 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8589 if (net->mtu > SCTP_MIN_OVERHEAD)
8590 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8600 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8601 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8602 (skip_data_for_this_net == 0)) ||
8604 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8605 if (no_data_chunks) {
8606 /* let only control go out */
8610 if (net->flight_size >= net->cwnd) {
8611 /* skip this net, no room for data */
8615 if ((chk->whoTo != NULL) &&
8616 (chk->whoTo != net)) {
8617 /* Don't send the chunk on this net */
8621 if (asoc->sctp_cmt_on_off == 0) {
8622 if ((asoc->alternate) &&
8623 (asoc->alternate != net) &&
8624 (chk->whoTo == NULL)) {
8626 } else if ((net != asoc->primary_destination) &&
8627 (asoc->alternate == NULL) &&
8628 (chk->whoTo == NULL)) {
8632 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8634 * strange, we have a chunk that is
8635 * to big for its destination and
8636 * yet no fragment ok flag.
8637 * Something went wrong when the
8638 * PMTU changed...we did not mark
8639 * this chunk for some reason?? I
8640 * will fix it here by letting IP
8641 * fragment it for now and printing
8642 * a warning. This really should not
8645 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8646 chk->send_size, mtu);
8647 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8649 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8650 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8651 struct sctp_data_chunk *dchkh;
8653 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8654 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8656 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8657 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8658 /* ok we will add this one */
8661 * Add an AUTH chunk, if chunk
8662 * requires it, save the offset into
8663 * the chain for AUTH
8665 if (data_auth_reqd) {
8667 outchain = sctp_add_auth_chunk(outchain,
8673 auth_keyid = chk->auth_keyid;
8675 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8676 } else if (override_ok) {
8681 auth_keyid = chk->auth_keyid;
8683 } else if (auth_keyid != chk->auth_keyid) {
8691 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8692 chk->send_size, chk->copy_by_ref);
8693 if (outchain == NULL) {
8694 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8695 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8696 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8699 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8702 /* upate our MTU size */
8703 /* Do clear IP_DF ? */
8704 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8707 /* unsigned subtraction of mtu */
8708 if (mtu > chk->send_size)
8709 mtu -= chk->send_size;
8712 /* unsigned subtraction of r_mtu */
8713 if (r_mtu > chk->send_size)
8714 r_mtu -= chk->send_size;
8718 to_out += chk->send_size;
8719 if ((to_out > mx_mtu) && no_fragmentflg) {
8721 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8723 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8727 chk->window_probe = 0;
8728 data_list[bundle_at++] = chk;
8729 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8732 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8733 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8734 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8736 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8738 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8739 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8749 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8751 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8752 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8753 data_list[0]->window_probe = 1;
8754 net->window_probe = 1;
8760 * Must be sent in order of the
8761 * TSN's (on a network)
8765 } /* for (chunk gather loop for this net) */
8766 } /* if asoc.state OPEN */
8768 /* Is there something to send for this destination? */
8770 /* We may need to start a control timer or two */
8772 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8775 * do NOT clear the asconf flag as it is
8776 * used to do appropriate source address
8781 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8784 /* must start a send timer if data is being sent */
8785 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8787 * no timer running on this destination
8790 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8792 if (bundle_at || hbflag) {
8793 /* For data/asconf and hb set time */
8794 if (*now_filled == 0) {
8795 (void)SCTP_GETTIME_TIMEVAL(now);
8798 net->last_sent_time = *now;
8800 /* Now send it, if there is anything to send :> */
8801 if ((error = sctp_lowlevel_chunk_output(inp,
8804 (struct sockaddr *)&net->ro._l_addr,
8812 inp->sctp_lport, stcb->rport,
8813 htonl(stcb->asoc.peer_vtag),
8817 /* error, we could not output */
8818 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8819 if (from_where == 0) {
8820 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8822 if (error == ENOBUFS) {
8823 asoc->ifp_had_enobuf = 1;
8824 SCTP_STAT_INCR(sctps_lowlevelerr);
8826 if (error == EHOSTUNREACH) {
8828 * Destination went unreachable
8831 sctp_move_chunks_from_net(stcb, net);
8835 * I add this line to be paranoid. As far as
8836 * I can tell the continue, takes us back to
8837 * the top of the for, but just to make sure
8838 * I will reset these again here.
8841 continue; /* This takes us back to the
8842 * for() for the nets. */
8844 asoc->ifp_had_enobuf = 0;
8850 *num_out += (ctl_cnt + bundle_at);
8853 /* setup for a RTO measurement */
8854 tsns_sent = data_list[0]->rec.data.tsn;
8855 /* fill time if not already filled */
8856 if (*now_filled == 0) {
8857 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8859 *now = asoc->time_last_sent;
8861 asoc->time_last_sent = *now;
8863 if (net->rto_needed) {
8864 data_list[0]->do_rtt = 1;
8865 net->rto_needed = 0;
8867 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8868 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8874 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8875 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8878 if (old_start_at == NULL) {
8879 old_start_at = start_at;
8880 start_at = TAILQ_FIRST(&asoc->nets);
8882 goto again_one_more_time;
8886 * At the end there should be no NON timed chunks hanging on this
8889 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8890 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8892 if ((*num_out == 0) && (*reason_code == 0)) {
8897 sctp_clean_up_ctl(stcb, asoc, so_locked);
8902 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8905 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8906 * the control chunk queue.
8908 struct sctp_chunkhdr *hdr;
8909 struct sctp_tmit_chunk *chk;
8910 struct mbuf *mat, *last_mbuf;
8911 uint32_t chunk_length;
8912 uint16_t padding_length;
8914 SCTP_TCB_LOCK_ASSERT(stcb);
8915 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8916 if (op_err == NULL) {
8921 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8922 chunk_length += SCTP_BUF_LEN(mat);
8923 if (SCTP_BUF_NEXT(mat) == NULL) {
8927 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8928 sctp_m_freem(op_err);
8931 padding_length = chunk_length % 4;
8932 if (padding_length != 0) {
8933 padding_length = 4 - padding_length;
8935 if (padding_length != 0) {
8936 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8937 sctp_m_freem(op_err);
8941 sctp_alloc_a_chunk(stcb, chk);
8944 sctp_m_freem(op_err);
8947 chk->copy_by_ref = 0;
8948 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8949 chk->rec.chunk_id.can_take_data = 0;
8951 chk->send_size = (uint16_t)chunk_length;
8952 chk->sent = SCTP_DATAGRAM_UNSENT;
8954 chk->asoc = &stcb->asoc;
8957 hdr = mtod(op_err, struct sctp_chunkhdr *);
8958 hdr->chunk_type = SCTP_OPERATION_ERROR;
8959 hdr->chunk_flags = 0;
8960 hdr->chunk_length = htons(chk->send_size);
8961 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8962 chk->asoc->ctrl_queue_cnt++;
8966 sctp_send_cookie_echo(struct mbuf *m,
8967 int offset, int limit,
8968 struct sctp_tcb *stcb,
8969 struct sctp_nets *net)
8972 * pull out the cookie and put it at the front of the control chunk
8976 struct mbuf *cookie;
8977 struct sctp_paramhdr param, *phdr;
8978 struct sctp_chunkhdr *hdr;
8979 struct sctp_tmit_chunk *chk;
8980 uint16_t ptype, plen;
8982 SCTP_TCB_LOCK_ASSERT(stcb);
8983 /* First find the cookie in the param area */
8985 at = offset + sizeof(struct sctp_init_chunk);
8987 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8991 ptype = ntohs(phdr->param_type);
8992 plen = ntohs(phdr->param_length);
8993 if (plen < sizeof(struct sctp_paramhdr)) {
8996 if (ptype == SCTP_STATE_COOKIE) {
8999 /* found the cookie */
9000 if (at + plen > limit) {
9003 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9004 if (cookie == NULL) {
9008 if ((pad = (plen % 4)) > 0) {
9012 if (sctp_pad_lastmbuf(cookie, pad, NULL) == NULL) {
9016 #ifdef SCTP_MBUF_LOGGING
9017 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9018 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9023 at += SCTP_SIZE32(plen);
9025 /* ok, we got the cookie lets change it into a cookie echo chunk */
9026 /* first the change from param to cookie */
9027 hdr = mtod(cookie, struct sctp_chunkhdr *);
9028 hdr->chunk_type = SCTP_COOKIE_ECHO;
9029 hdr->chunk_flags = 0;
9030 /* get the chunk stuff now and place it in the FRONT of the queue */
9031 sctp_alloc_a_chunk(stcb, chk);
9034 sctp_m_freem(cookie);
9037 chk->copy_by_ref = 0;
9038 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9039 chk->rec.chunk_id.can_take_data = 0;
9040 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9041 chk->send_size = SCTP_SIZE32(plen);
9042 chk->sent = SCTP_DATAGRAM_UNSENT;
9044 chk->asoc = &stcb->asoc;
9047 atomic_add_int(&chk->whoTo->ref_count, 1);
9048 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9049 chk->asoc->ctrl_queue_cnt++;
9054 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9058 struct sctp_nets *net)
9061 * take a HB request and make it into a HB ack and send it.
9063 struct mbuf *outchain;
9064 struct sctp_chunkhdr *chdr;
9065 struct sctp_tmit_chunk *chk;
9068 /* must have a net pointer */
9071 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9072 if (outchain == NULL) {
9073 /* gak out of memory */
9076 #ifdef SCTP_MBUF_LOGGING
9077 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9078 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9081 chdr = mtod(outchain, struct sctp_chunkhdr *);
9082 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9083 chdr->chunk_flags = 0;
9084 if (chk_length % 4 != 0) {
9085 sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
9087 sctp_alloc_a_chunk(stcb, chk);
9090 sctp_m_freem(outchain);
9093 chk->copy_by_ref = 0;
9094 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9095 chk->rec.chunk_id.can_take_data = 1;
9097 chk->send_size = chk_length;
9098 chk->sent = SCTP_DATAGRAM_UNSENT;
9100 chk->asoc = &stcb->asoc;
9101 chk->data = outchain;
9103 atomic_add_int(&chk->whoTo->ref_count, 1);
9104 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9105 chk->asoc->ctrl_queue_cnt++;
9109 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9111 /* formulate and queue a cookie-ack back to sender */
9112 struct mbuf *cookie_ack;
9113 struct sctp_chunkhdr *hdr;
9114 struct sctp_tmit_chunk *chk;
9116 SCTP_TCB_LOCK_ASSERT(stcb);
9118 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9119 if (cookie_ack == NULL) {
9123 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9124 sctp_alloc_a_chunk(stcb, chk);
9127 sctp_m_freem(cookie_ack);
9130 chk->copy_by_ref = 0;
9131 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9132 chk->rec.chunk_id.can_take_data = 1;
9134 chk->send_size = sizeof(struct sctp_chunkhdr);
9135 chk->sent = SCTP_DATAGRAM_UNSENT;
9137 chk->asoc = &stcb->asoc;
9138 chk->data = cookie_ack;
9139 if (chk->asoc->last_control_chunk_from != NULL) {
9140 chk->whoTo = chk->asoc->last_control_chunk_from;
9141 atomic_add_int(&chk->whoTo->ref_count, 1);
9145 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9146 hdr->chunk_type = SCTP_COOKIE_ACK;
9147 hdr->chunk_flags = 0;
9148 hdr->chunk_length = htons(chk->send_size);
9149 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9150 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9151 chk->asoc->ctrl_queue_cnt++;
9156 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9158 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9159 struct mbuf *m_shutdown_ack;
9160 struct sctp_shutdown_ack_chunk *ack_cp;
9161 struct sctp_tmit_chunk *chk;
9163 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9164 if (m_shutdown_ack == NULL) {
9168 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9169 sctp_alloc_a_chunk(stcb, chk);
9172 sctp_m_freem(m_shutdown_ack);
9175 chk->copy_by_ref = 0;
9176 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9177 chk->rec.chunk_id.can_take_data = 1;
9179 chk->send_size = sizeof(struct sctp_chunkhdr);
9180 chk->sent = SCTP_DATAGRAM_UNSENT;
9182 chk->asoc = &stcb->asoc;
9183 chk->data = m_shutdown_ack;
9186 atomic_add_int(&chk->whoTo->ref_count, 1);
9188 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9189 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9190 ack_cp->ch.chunk_flags = 0;
9191 ack_cp->ch.chunk_length = htons(chk->send_size);
9192 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9193 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9194 chk->asoc->ctrl_queue_cnt++;
9199 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9201 /* formulate and queue a SHUTDOWN to the sender */
9202 struct mbuf *m_shutdown;
9203 struct sctp_shutdown_chunk *shutdown_cp;
9204 struct sctp_tmit_chunk *chk;
9206 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9207 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9208 /* We already have a SHUTDOWN queued. Reuse it. */
9210 sctp_free_remote_addr(chk->whoTo);
9217 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9218 if (m_shutdown == NULL) {
9222 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9223 sctp_alloc_a_chunk(stcb, chk);
9226 sctp_m_freem(m_shutdown);
9229 chk->copy_by_ref = 0;
9230 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9231 chk->rec.chunk_id.can_take_data = 1;
9233 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9234 chk->sent = SCTP_DATAGRAM_UNSENT;
9236 chk->asoc = &stcb->asoc;
9237 chk->data = m_shutdown;
9240 atomic_add_int(&chk->whoTo->ref_count, 1);
9242 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9243 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9244 shutdown_cp->ch.chunk_flags = 0;
9245 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9246 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9247 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9248 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9249 chk->asoc->ctrl_queue_cnt++;
9251 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9254 atomic_add_int(&chk->whoTo->ref_count, 1);
9256 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9257 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9258 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9264 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9267 * formulate and queue an ASCONF to the peer. ASCONF parameters
9268 * should be queued on the assoc queue.
9270 struct sctp_tmit_chunk *chk;
9271 struct mbuf *m_asconf;
9274 SCTP_TCB_LOCK_ASSERT(stcb);
9276 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9277 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9278 /* can't send a new one if there is one in flight already */
9282 /* compose an ASCONF chunk, maximum length is PMTU */
9283 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9284 if (m_asconf == NULL) {
9288 sctp_alloc_a_chunk(stcb, chk);
9291 sctp_m_freem(m_asconf);
9295 chk->copy_by_ref = 0;
9296 chk->rec.chunk_id.id = SCTP_ASCONF;
9297 chk->rec.chunk_id.can_take_data = 0;
9298 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9299 chk->data = m_asconf;
9300 chk->send_size = len;
9301 chk->sent = SCTP_DATAGRAM_UNSENT;
9303 chk->asoc = &stcb->asoc;
9306 atomic_add_int(&chk->whoTo->ref_count, 1);
9308 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9309 chk->asoc->ctrl_queue_cnt++;
9314 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9317 * formulate and queue a asconf-ack back to sender. the asconf-ack
9318 * must be stored in the tcb.
9320 struct sctp_tmit_chunk *chk;
9321 struct sctp_asconf_ack *ack, *latest_ack;
9323 struct sctp_nets *net = NULL;
9325 SCTP_TCB_LOCK_ASSERT(stcb);
9326 /* Get the latest ASCONF-ACK */
9327 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9328 if (latest_ack == NULL) {
9331 if (latest_ack->last_sent_to != NULL &&
9332 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9333 /* we're doing a retransmission */
9334 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9337 if (stcb->asoc.last_control_chunk_from == NULL) {
9338 if (stcb->asoc.alternate) {
9339 net = stcb->asoc.alternate;
9341 net = stcb->asoc.primary_destination;
9344 net = stcb->asoc.last_control_chunk_from;
9349 if (stcb->asoc.last_control_chunk_from == NULL) {
9350 if (stcb->asoc.alternate) {
9351 net = stcb->asoc.alternate;
9353 net = stcb->asoc.primary_destination;
9356 net = stcb->asoc.last_control_chunk_from;
9359 latest_ack->last_sent_to = net;
9361 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9362 if (ack->data == NULL) {
9366 /* copy the asconf_ack */
9367 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9368 if (m_ack == NULL) {
9369 /* couldn't copy it */
9372 #ifdef SCTP_MBUF_LOGGING
9373 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9374 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9378 sctp_alloc_a_chunk(stcb, chk);
9382 sctp_m_freem(m_ack);
9385 chk->copy_by_ref = 0;
9386 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9387 chk->rec.chunk_id.can_take_data = 1;
9388 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9391 atomic_add_int(&chk->whoTo->ref_count, 1);
9394 chk->send_size = ack->len;
9395 chk->sent = SCTP_DATAGRAM_UNSENT;
9397 chk->asoc = &stcb->asoc;
9399 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9400 chk->asoc->ctrl_queue_cnt++;
9406 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9407 struct sctp_tcb *stcb,
9408 struct sctp_association *asoc,
9409 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked)
9412 * send out one MTU of retransmission. If fast_retransmit is
9413 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9414 * rwnd. For a Cookie or Asconf in the control chunk queue we
9415 * retransmit them by themselves.
9417 * For data chunks we will pick out the lowest TSN's in the sent_queue
9418 * marked for resend and bundle them all together (up to a MTU of
9419 * destination). The address to send to should have been
9420 * selected/changed where the retransmission was marked (i.e. in FR
9421 * or t3-timeout routines).
9423 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9424 struct sctp_tmit_chunk *chk, *fwd;
9425 struct mbuf *m, *endofchain;
9426 struct sctp_nets *net = NULL;
9427 uint32_t tsns_sent = 0;
9428 int no_fragmentflg, bundle_at, cnt_thru;
9430 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9431 struct sctp_auth_chunk *auth = NULL;
9432 uint32_t auth_offset = 0;
9433 uint16_t auth_keyid;
9434 int override_ok = 1;
9435 int data_auth_reqd = 0;
9438 SCTP_TCB_LOCK_ASSERT(stcb);
9439 tmr_started = ctl_cnt = 0;
9444 endofchain = m = NULL;
9445 auth_keyid = stcb->asoc.authinfo.active_keyid;
9446 #ifdef SCTP_AUDITING_ENABLED
9447 sctp_audit_log(0xC3, 1);
9449 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9450 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9451 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9452 asoc->sent_queue_retran_cnt);
9453 asoc->sent_queue_cnt = 0;
9454 asoc->sent_queue_cnt_removeable = 0;
9455 /* send back 0/0 so we enter normal transmission */
9459 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9460 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9461 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9462 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9463 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9466 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9467 if (chk != asoc->str_reset) {
9469 * not eligible for retran if its
9476 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9480 * Add an AUTH chunk, if chunk requires it save the
9481 * offset into the chain for AUTH
9483 if ((auth == NULL) &&
9484 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9485 stcb->asoc.peer_auth_chunks))) {
9486 m = sctp_add_auth_chunk(m, &endofchain,
9487 &auth, &auth_offset,
9489 chk->rec.chunk_id.id);
9490 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9492 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9498 /* do we have control chunks to retransmit? */
9500 /* Start a timer no matter if we succeed or fail */
9501 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9502 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9503 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9504 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9505 chk->snd_count++; /* update our count */
9506 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9507 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9508 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9509 no_fragmentflg, 0, 0,
9510 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9511 chk->whoTo->port, NULL,
9514 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9515 if (error == ENOBUFS) {
9516 asoc->ifp_had_enobuf = 1;
9517 SCTP_STAT_INCR(sctps_lowlevelerr);
9521 asoc->ifp_had_enobuf = 0;
9527 * We don't want to mark the net->sent time here since this
9528 * we use this for HB and retrans cannot measure RTT
9530 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9532 chk->sent = SCTP_DATAGRAM_SENT;
9533 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9537 /* Clean up the fwd-tsn list */
9538 sctp_clean_up_ctl(stcb, asoc, so_locked);
9543 * Ok, it is just data retransmission we need to do or that and a
9544 * fwd-tsn with it all.
9546 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9547 return (SCTP_RETRAN_DONE);
9549 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9550 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9551 /* not yet open, resend the cookie and that is it */
9554 #ifdef SCTP_AUDITING_ENABLED
9555 sctp_auditing(20, inp, stcb, NULL);
9557 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9558 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9559 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9560 /* No, not sent to this net or not ready for rtx */
9563 if (chk->data == NULL) {
9564 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9565 chk->rec.data.tsn, chk->snd_count, chk->sent);
9568 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9569 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9570 struct mbuf *op_err;
9571 char msg[SCTP_DIAG_INFO_LEN];
9573 SCTP_SNPRINTF(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9574 chk->rec.data.tsn, chk->snd_count);
9575 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9577 atomic_add_int(&stcb->asoc.refcnt, 1);
9578 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9580 SCTP_TCB_LOCK(stcb);
9581 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9582 return (SCTP_RETRAN_EXIT);
9584 /* pick up the net */
9586 switch (net->ro._l_addr.sa.sa_family) {
9589 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9594 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9603 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9604 /* No room in peers rwnd */
9607 tsn = asoc->last_acked_seq + 1;
9608 if (tsn == chk->rec.data.tsn) {
9610 * we make a special exception for this
9611 * case. The peer has no rwnd but is missing
9612 * the lowest chunk.. which is probably what
9613 * is holding up the rwnd.
9615 goto one_chunk_around;
9620 if (asoc->peers_rwnd < mtu) {
9622 if ((asoc->peers_rwnd == 0) &&
9623 (asoc->total_flight == 0)) {
9624 chk->window_probe = 1;
9625 chk->whoTo->window_probe = 1;
9628 #ifdef SCTP_AUDITING_ENABLED
9629 sctp_audit_log(0xC3, 2);
9633 net->fast_retran_ip = 0;
9634 if (chk->rec.data.doing_fast_retransmit == 0) {
9636 * if no FR in progress skip destination that have
9637 * flight_size > cwnd.
9639 if (net->flight_size >= net->cwnd) {
9644 * Mark the destination net to have FR recovery
9648 net->fast_retran_ip = 1;
9652 * if no AUTH is yet included and this chunk requires it,
9653 * make sure to account for it. We don't apply the size
9654 * until the AUTH chunk is actually added below in case
9655 * there is no room for this chunk.
9657 if (data_auth_reqd && (auth == NULL)) {
9658 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9662 if ((chk->send_size <= (mtu - dmtu)) ||
9663 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9664 /* ok we will add this one */
9665 if (data_auth_reqd) {
9667 m = sctp_add_auth_chunk(m,
9673 auth_keyid = chk->auth_keyid;
9675 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9676 } else if (override_ok) {
9677 auth_keyid = chk->auth_keyid;
9679 } else if (chk->auth_keyid != auth_keyid) {
9680 /* different keyid, so done bundling */
9684 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9686 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9689 /* Do clear IP_DF ? */
9690 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9693 /* upate our MTU size */
9694 if (mtu > (chk->send_size + dmtu))
9695 mtu -= (chk->send_size + dmtu);
9698 data_list[bundle_at++] = chk;
9699 if (one_chunk && (asoc->total_flight <= 0)) {
9700 SCTP_STAT_INCR(sctps_windowprobed);
9703 if (one_chunk == 0) {
9705 * now are there anymore forward from chk to pick
9708 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9709 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9710 /* Nope, not for retran */
9713 if (fwd->whoTo != net) {
9714 /* Nope, not the net in question */
9717 if (data_auth_reqd && (auth == NULL)) {
9718 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9721 if (fwd->send_size <= (mtu - dmtu)) {
9722 if (data_auth_reqd) {
9724 m = sctp_add_auth_chunk(m,
9730 auth_keyid = fwd->auth_keyid;
9732 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9733 } else if (override_ok) {
9734 auth_keyid = fwd->auth_keyid;
9736 } else if (fwd->auth_keyid != auth_keyid) {
9744 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9746 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9749 /* Do clear IP_DF ? */
9750 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9753 /* upate our MTU size */
9754 if (mtu > (fwd->send_size + dmtu))
9755 mtu -= (fwd->send_size + dmtu);
9758 data_list[bundle_at++] = fwd;
9759 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9763 /* can't fit so we are done */
9768 /* Is there something to send for this destination? */
9771 * No matter if we fail/or succeed we should start a
9772 * timer. A failure is like a lost IP packet :-)
9774 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9776 * no timer running on this destination
9779 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9782 /* Now lets send it, if there is anything to send :> */
9783 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9784 (struct sockaddr *)&net->ro._l_addr, m,
9785 auth_offset, auth, auth_keyid,
9786 no_fragmentflg, 0, 0,
9787 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9791 /* error, we could not output */
9792 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9793 if (error == ENOBUFS) {
9794 asoc->ifp_had_enobuf = 1;
9795 SCTP_STAT_INCR(sctps_lowlevelerr);
9799 asoc->ifp_had_enobuf = 0;
9806 * We don't want to mark the net->sent time here
9807 * since this we use this for HB and retrans cannot
9810 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9812 /* For auto-close */
9814 if (*now_filled == 0) {
9815 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9816 *now = asoc->time_last_sent;
9819 asoc->time_last_sent = *now;
9821 *cnt_out += bundle_at;
9822 #ifdef SCTP_AUDITING_ENABLED
9823 sctp_audit_log(0xC4, bundle_at);
9826 tsns_sent = data_list[0]->rec.data.tsn;
9828 for (i = 0; i < bundle_at; i++) {
9829 SCTP_STAT_INCR(sctps_sendretransdata);
9830 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9832 * When we have a revoked data, and we
9833 * retransmit it, then we clear the revoked
9834 * flag since this flag dictates if we
9835 * subtracted from the fs
9837 if (data_list[i]->rec.data.chunk_was_revoked) {
9838 /* Deflate the cwnd */
9839 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9840 data_list[i]->rec.data.chunk_was_revoked = 0;
9842 data_list[i]->snd_count++;
9843 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9844 /* record the time */
9845 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9846 if (data_list[i]->book_size_scale) {
9848 * need to double the book size on
9851 data_list[i]->book_size_scale = 0;
9853 * Since we double the booksize, we
9854 * must also double the output queue
9855 * size, since this get shrunk when
9856 * we free by this amount.
9858 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9859 data_list[i]->book_size *= 2;
9861 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9862 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9863 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9865 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9866 (uint32_t)(data_list[i]->send_size +
9867 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9869 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9870 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9871 data_list[i]->whoTo->flight_size,
9872 data_list[i]->book_size,
9873 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9874 data_list[i]->rec.data.tsn);
9876 sctp_flight_size_increase(data_list[i]);
9877 sctp_total_flight_increase(stcb, data_list[i]);
9878 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9879 /* SWS sender side engages */
9880 asoc->peers_rwnd = 0;
9883 (data_list[i]->rec.data.doing_fast_retransmit)) {
9884 SCTP_STAT_INCR(sctps_sendfastretrans);
9885 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9886 (tmr_started == 0)) {
9888 * ok we just fast-retrans'd
9889 * the lowest TSN, i.e the
9890 * first on the list. In
9891 * this case we want to give
9892 * some more time to get a
9893 * SACK back without a
9896 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9897 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9898 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9902 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9903 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9905 #ifdef SCTP_AUDITING_ENABLED
9906 sctp_auditing(21, inp, stcb, NULL);
9912 if (asoc->sent_queue_retran_cnt <= 0) {
9913 /* all done we have no more to retran */
9914 asoc->sent_queue_retran_cnt = 0;
9918 /* No more room in rwnd */
9921 /* stop the for loop here. we sent out a packet */
9928 sctp_timer_validation(struct sctp_inpcb *inp,
9929 struct sctp_tcb *stcb,
9930 struct sctp_association *asoc)
9932 struct sctp_nets *net;
9934 /* Validate that a timer is running somewhere */
9935 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9936 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9937 /* Here is a timer */
9941 SCTP_TCB_LOCK_ASSERT(stcb);
9942 /* Gak, we did not have a timer somewhere */
9943 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9944 if (asoc->alternate) {
9945 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9947 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9953 sctp_chunk_output(struct sctp_inpcb *inp,
9954 struct sctp_tcb *stcb,
9959 * Ok this is the generic chunk service queue. we must do the
9961 * - See if there are retransmits pending, if so we must
9963 * - Service the stream queue that is next, moving any
9964 * message (note I must get a complete message i.e.
9965 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9967 * - Check to see if the cwnd/rwnd allows any output, if so we
9968 * go ahead and fomulate and send the low level chunks. Making sure
9969 * to combine any control in the control chunk queue also.
9971 struct sctp_association *asoc;
9972 struct sctp_nets *net;
9973 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9974 unsigned int burst_cnt = 0;
9978 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9981 unsigned int tot_frs = 0;
9985 /* The Nagle algorithm is only applied when handling a send call. */
9986 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9987 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9995 SCTP_TCB_LOCK_ASSERT(stcb);
9997 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9999 if ((un_sent <= 0) &&
10000 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10001 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10002 (asoc->sent_queue_retran_cnt == 0) &&
10003 (asoc->trigger_reset == 0)) {
10004 /* Nothing to do unless there is something to be sent left */
10008 * Do we have something to send, data or control AND a sack timer
10009 * running, if so piggy-back the sack.
10011 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10012 sctp_send_sack(stcb, so_locked);
10013 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
10014 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10016 while (asoc->sent_queue_retran_cnt) {
10018 * Ok, it is retransmission time only, we send out only ONE
10019 * packet with a single call off to the retran code.
10021 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10023 * Special hook for handling cookiess discarded
10024 * by peer that carried data. Send cookie-ack only
10025 * and then the next call with get the retran's.
10027 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10029 &now, &now_filled, frag_point, so_locked);
10031 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10032 /* if its not from a HB then do it */
10034 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10040 * its from any other place, we don't allow retran
10041 * output (only control)
10046 /* Can't send anymore */
10048 * now lets push out control by calling med-level
10049 * output once. this assures that we WILL send HB's
10052 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10054 &now, &now_filled, frag_point, so_locked);
10055 #ifdef SCTP_AUDITING_ENABLED
10056 sctp_auditing(8, inp, stcb, NULL);
10058 sctp_timer_validation(inp, stcb, asoc);
10063 * The count was off.. retran is not happening so do
10064 * the normal retransmission.
10066 #ifdef SCTP_AUDITING_ENABLED
10067 sctp_auditing(9, inp, stcb, NULL);
10069 if (ret == SCTP_RETRAN_EXIT) {
10074 if (from_where == SCTP_OUTPUT_FROM_T3) {
10075 /* Only one transmission allowed out of a timeout */
10076 #ifdef SCTP_AUDITING_ENABLED
10077 sctp_auditing(10, inp, stcb, NULL);
10079 /* Push out any control */
10080 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10081 &now, &now_filled, frag_point, so_locked);
10084 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10085 /* Hit FR burst limit */
10088 if ((num_out == 0) && (ret == 0)) {
10089 /* No more retrans to send */
10093 #ifdef SCTP_AUDITING_ENABLED
10094 sctp_auditing(12, inp, stcb, NULL);
10096 /* Check for bad destinations, if they exist move chunks around. */
10097 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10098 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10100 * if possible move things off of this address we
10101 * still may send below due to the dormant state but
10102 * we try to find an alternate address to send to
10103 * and if we have one we move all queued data on the
10104 * out wheel to this alternate address.
10106 if (net->ref_count > 1)
10107 sctp_move_chunks_from_net(stcb, net);
10110 * if ((asoc->sat_network) || (net->addr_is_local))
10111 * { burst_limit = asoc->max_burst *
10112 * SCTP_SAT_NETWORK_BURST_INCR; }
10114 if (asoc->max_burst > 0) {
10115 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10116 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10118 * JRS - Use the congestion
10119 * control given in the
10120 * congestion control module
10122 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10123 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10124 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10126 SCTP_STAT_INCR(sctps_maxburstqueued);
10128 net->fast_retran_ip = 0;
10130 if (net->flight_size == 0) {
10132 * Should be decaying the
10143 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10144 &reason_code, 0, from_where,
10145 &now, &now_filled, frag_point, so_locked);
10147 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10148 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10149 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10151 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10152 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10153 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10157 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10159 tot_out += num_out;
10161 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10162 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10163 if (num_out == 0) {
10164 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10169 * When the Nagle algorithm is used, look at how
10170 * much is unsent, then if its smaller than an MTU
10171 * and we have data in flight we stop, except if we
10172 * are handling a fragmented user message.
10174 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10175 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10176 (stcb->asoc.total_flight > 0)) {
10177 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10181 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10182 TAILQ_EMPTY(&asoc->send_queue) &&
10183 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10184 /* Nothing left to send */
10187 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10188 /* Nothing left to send */
10191 } while (num_out &&
10192 ((asoc->max_burst == 0) ||
10193 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10194 (burst_cnt < asoc->max_burst)));
10196 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10197 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10198 SCTP_STAT_INCR(sctps_maxburstqueued);
10199 asoc->burst_limit_applied = 1;
10200 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10201 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10204 asoc->burst_limit_applied = 0;
10207 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10208 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10210 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10214 * Now we need to clean up the control chunk chain if a ECNE is on
10215 * it. It must be marked as UNSENT again so next call will continue
10216 * to send it until such time that we get a CWR, to remove it.
10218 if (stcb->asoc.ecn_echo_cnt_onq)
10219 sctp_fix_ecn_echo(asoc);
10221 if (stcb->asoc.trigger_reset) {
10222 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10231 struct sctp_inpcb *inp,
10233 struct sockaddr *addr,
10234 struct mbuf *control,
10239 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10243 if (inp->sctp_socket == NULL) {
10244 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10247 return (sctp_sosend(inp->sctp_socket,
10249 (struct uio *)NULL,
10257 send_forward_tsn(struct sctp_tcb *stcb,
10258 struct sctp_association *asoc)
10260 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10261 struct sctp_forward_tsn_chunk *fwdtsn;
10262 struct sctp_strseq *strseq;
10263 struct sctp_strseq_mid *strseq_m;
10264 uint32_t advance_peer_ack_point;
10265 unsigned int cnt_of_space, i, ovh;
10266 unsigned int space_needed;
10267 unsigned int cnt_of_skipped = 0;
10269 SCTP_TCB_LOCK_ASSERT(stcb);
10270 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10271 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10272 /* mark it to unsent */
10273 chk->sent = SCTP_DATAGRAM_UNSENT;
10274 chk->snd_count = 0;
10275 /* Do we correct its output location? */
10277 sctp_free_remote_addr(chk->whoTo);
10280 goto sctp_fill_in_rest;
10283 /* Ok if we reach here we must build one */
10284 sctp_alloc_a_chunk(stcb, chk);
10288 asoc->fwd_tsn_cnt++;
10289 chk->copy_by_ref = 0;
10291 * We don't do the old thing here since this is used not for on-wire
10292 * but to tell if we are sending a fwd-tsn by the stack during
10293 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10295 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10296 chk->rec.chunk_id.can_take_data = 0;
10300 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10301 if (chk->data == NULL) {
10302 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10305 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10306 chk->sent = SCTP_DATAGRAM_UNSENT;
10307 chk->snd_count = 0;
10308 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10309 asoc->ctrl_queue_cnt++;
10312 * Here we go through and fill out the part that deals with
10313 * stream/seq of the ones we skip.
10315 SCTP_BUF_LEN(chk->data) = 0;
10316 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10317 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10318 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10319 /* no more to look at */
10322 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10323 /* We don't report these */
10328 if (asoc->idata_supported) {
10329 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10330 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10332 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10333 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10335 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10337 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10338 ovh = SCTP_MIN_OVERHEAD;
10340 ovh = SCTP_MIN_V4_OVERHEAD;
10342 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10343 /* trim to a mtu size */
10344 cnt_of_space = asoc->smallest_mtu - ovh;
10346 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10347 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10348 0xff, 0, cnt_of_skipped,
10349 asoc->advanced_peer_ack_point);
10351 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10352 if (cnt_of_space < space_needed) {
10354 * ok we must trim down the chunk by lowering the
10355 * advance peer ack point.
10357 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10358 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10359 0xff, 0xff, cnt_of_space,
10362 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10363 if (asoc->idata_supported) {
10364 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10366 cnt_of_skipped /= sizeof(struct sctp_strseq);
10369 * Go through and find the TSN that will be the one
10372 at = TAILQ_FIRST(&asoc->sent_queue);
10374 for (i = 0; i < cnt_of_skipped; i++) {
10375 tp1 = TAILQ_NEXT(at, sctp_next);
10382 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10383 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10384 0xff, cnt_of_skipped, at->rec.data.tsn,
10385 asoc->advanced_peer_ack_point);
10389 * last now points to last one I can report, update
10393 advance_peer_ack_point = last->rec.data.tsn;
10395 if (asoc->idata_supported) {
10396 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10397 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10399 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10400 cnt_of_skipped * sizeof(struct sctp_strseq);
10403 chk->send_size = space_needed;
10404 /* Setup the chunk */
10405 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10406 fwdtsn->ch.chunk_length = htons(chk->send_size);
10407 fwdtsn->ch.chunk_flags = 0;
10408 if (asoc->idata_supported) {
10409 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10411 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10413 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10414 SCTP_BUF_LEN(chk->data) = chk->send_size;
10417 * Move pointer to after the fwdtsn and transfer to the
10420 if (asoc->idata_supported) {
10421 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10424 strseq = (struct sctp_strseq *)fwdtsn;
10428 * Now populate the strseq list. This is done blindly
10429 * without pulling out duplicate stream info. This is
10430 * inefficent but won't harm the process since the peer will
10431 * look at these in sequence and will thus release anything.
10432 * It could mean we exceed the PMTU and chop off some that
10433 * we could have included.. but this is unlikely (aka 1432/4
10434 * would mean 300+ stream seq's would have to be reported in
10435 * one FWD-TSN. With a bit of work we can later FIX this to
10436 * optimize and pull out duplicates.. but it does add more
10437 * overhead. So for now... not!
10440 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10441 if (i >= cnt_of_skipped) {
10444 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10445 /* We don't report these */
10448 if (at->rec.data.tsn == advance_peer_ack_point) {
10449 at->rec.data.fwd_tsn_cnt = 0;
10451 if (asoc->idata_supported) {
10452 strseq_m->sid = htons(at->rec.data.sid);
10453 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10454 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10456 strseq_m->flags = 0;
10458 strseq_m->mid = htonl(at->rec.data.mid);
10461 strseq->sid = htons(at->rec.data.sid);
10462 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10471 sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
10474 * Queue up a SACK or NR-SACK in the control queue.
10475 * We must first check to see if a SACK or NR-SACK is
10476 * somehow on the control queue.
10477 * If so, we will take and and remove the old one.
10479 struct sctp_association *asoc;
10480 struct sctp_tmit_chunk *chk, *a_chk;
10481 struct sctp_sack_chunk *sack;
10482 struct sctp_nr_sack_chunk *nr_sack;
10483 struct sctp_gap_ack_block *gap_descriptor;
10484 const struct sack_track *selector;
10489 int limit_reached = 0;
10490 unsigned int i, siz, j;
10491 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10494 uint32_t highest_tsn;
10499 if (stcb->asoc.nrsack_supported == 1) {
10500 type = SCTP_NR_SELECTIVE_ACK;
10502 type = SCTP_SELECTIVE_ACK;
10505 asoc = &stcb->asoc;
10506 SCTP_TCB_LOCK_ASSERT(stcb);
10507 if (asoc->last_data_chunk_from == NULL) {
10508 /* Hmm we never received anything */
10511 sctp_slide_mapping_arrays(stcb);
10512 sctp_set_rwnd(stcb, asoc);
10513 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10514 if (chk->rec.chunk_id.id == type) {
10515 /* Hmm, found a sack already on queue, remove it */
10516 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10517 asoc->ctrl_queue_cnt--;
10520 sctp_m_freem(a_chk->data);
10521 a_chk->data = NULL;
10523 if (a_chk->whoTo) {
10524 sctp_free_remote_addr(a_chk->whoTo);
10525 a_chk->whoTo = NULL;
10530 if (a_chk == NULL) {
10531 sctp_alloc_a_chunk(stcb, a_chk);
10532 if (a_chk == NULL) {
10533 /* No memory so we drop the idea, and set a timer */
10534 if (stcb->asoc.delayed_ack) {
10535 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10536 stcb->sctp_ep, stcb, NULL,
10537 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10538 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10539 stcb->sctp_ep, stcb, NULL);
10541 stcb->asoc.send_sack = 1;
10545 a_chk->copy_by_ref = 0;
10546 a_chk->rec.chunk_id.id = type;
10547 a_chk->rec.chunk_id.can_take_data = 1;
10549 /* Clear our pkt counts */
10550 asoc->data_pkts_seen = 0;
10553 a_chk->asoc = asoc;
10554 a_chk->snd_count = 0;
10555 a_chk->send_size = 0; /* fill in later */
10556 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10557 a_chk->whoTo = NULL;
10559 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10561 * Ok, the destination for the SACK is unreachable, lets see if
10562 * we can select an alternate to asoc->last_data_chunk_from
10564 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10565 if (a_chk->whoTo == NULL) {
10566 /* Nope, no alternate */
10567 a_chk->whoTo = asoc->last_data_chunk_from;
10570 a_chk->whoTo = asoc->last_data_chunk_from;
10572 if (a_chk->whoTo) {
10573 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10575 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10576 highest_tsn = asoc->highest_tsn_inside_map;
10578 highest_tsn = asoc->highest_tsn_inside_nr_map;
10580 if (highest_tsn == asoc->cumulative_tsn) {
10582 if (type == SCTP_SELECTIVE_ACK) {
10583 space_req = sizeof(struct sctp_sack_chunk);
10585 space_req = sizeof(struct sctp_nr_sack_chunk);
10588 /* gaps get a cluster */
10589 space_req = MCLBYTES;
10591 /* Ok now lets formulate a MBUF with our sack */
10592 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10593 if ((a_chk->data == NULL) ||
10594 (a_chk->whoTo == NULL)) {
10595 /* rats, no mbuf memory */
10597 /* was a problem with the destination */
10598 sctp_m_freem(a_chk->data);
10599 a_chk->data = NULL;
10601 sctp_free_a_chunk(stcb, a_chk, so_locked);
10602 /* sa_ignore NO_NULL_CHK */
10603 if (stcb->asoc.delayed_ack) {
10604 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10605 stcb->sctp_ep, stcb, NULL,
10606 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10607 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10608 stcb->sctp_ep, stcb, NULL);
10610 stcb->asoc.send_sack = 1;
10614 /* ok, lets go through and fill it in */
10615 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10616 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10617 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10618 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10620 limit = mtod(a_chk->data, caddr_t);
10625 if ((asoc->sctp_cmt_on_off > 0) &&
10626 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10628 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10629 * received, then set high bit to 1, else 0. Reset
10632 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10633 asoc->cmt_dac_pkts_rcvd = 0;
10635 #ifdef SCTP_ASOCLOG_OF_TSNS
10636 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10637 stcb->asoc.cumack_log_atsnt++;
10638 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10639 stcb->asoc.cumack_log_atsnt = 0;
10642 /* reset the readers interpretation */
10643 stcb->freed_by_sorcv_sincelast = 0;
10645 if (type == SCTP_SELECTIVE_ACK) {
10646 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10648 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10649 if (highest_tsn > asoc->mapping_array_base_tsn) {
10650 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10652 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
10656 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10657 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10658 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10659 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10661 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10665 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10668 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10670 if (((type == SCTP_SELECTIVE_ACK) &&
10671 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10672 ((type == SCTP_NR_SELECTIVE_ACK) &&
10673 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10674 /* we have a gap .. maybe */
10675 for (i = 0; i < siz; i++) {
10676 tsn_map = asoc->mapping_array[i];
10677 if (type == SCTP_SELECTIVE_ACK) {
10678 tsn_map |= asoc->nr_mapping_array[i];
10682 * Clear all bits corresponding to TSNs
10683 * smaller or equal to the cumulative TSN.
10685 tsn_map &= (~0U << (1 - offset));
10687 selector = &sack_array[tsn_map];
10688 if (mergeable && selector->right_edge) {
10690 * Backup, left and right edges were ok to
10696 if (selector->num_entries == 0)
10699 for (j = 0; j < selector->num_entries; j++) {
10700 if (mergeable && selector->right_edge) {
10702 * do a merge by NOT setting
10708 * no merge, set the left
10712 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10714 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10717 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10723 if (selector->left_edge) {
10727 if (limit_reached) {
10728 /* Reached the limit stop */
10734 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10735 (limit_reached == 0)) {
10738 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10739 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10741 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10744 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10747 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10749 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10750 /* we have a gap .. maybe */
10751 for (i = 0; i < siz; i++) {
10752 tsn_map = asoc->nr_mapping_array[i];
10755 * Clear all bits corresponding to
10756 * TSNs smaller or equal to the
10759 tsn_map &= (~0U << (1 - offset));
10761 selector = &sack_array[tsn_map];
10762 if (mergeable && selector->right_edge) {
10764 * Backup, left and right edges were
10767 num_nr_gap_blocks--;
10770 if (selector->num_entries == 0)
10773 for (j = 0; j < selector->num_entries; j++) {
10774 if (mergeable && selector->right_edge) {
10776 * do a merge by NOT
10783 * no merge, set the
10787 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10789 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10790 num_nr_gap_blocks++;
10792 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10798 if (selector->left_edge) {
10802 if (limit_reached) {
10803 /* Reached the limit stop */
10810 /* now we must add any dups we are going to report. */
10811 if ((limit_reached == 0) && (asoc->numduptsns)) {
10812 dup = (uint32_t *)gap_descriptor;
10813 for (i = 0; i < asoc->numduptsns; i++) {
10814 *dup = htonl(asoc->dup_tsns[i]);
10817 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10822 asoc->numduptsns = 0;
10825 * now that the chunk is prepared queue it to the control chunk
10828 if (type == SCTP_SELECTIVE_ACK) {
10829 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10830 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10831 num_dups * sizeof(int32_t));
10832 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10833 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10834 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10835 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10836 sack->sack.num_dup_tsns = htons(num_dups);
10837 sack->ch.chunk_type = type;
10838 sack->ch.chunk_flags = flags;
10839 sack->ch.chunk_length = htons(a_chk->send_size);
10841 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10842 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10843 num_dups * sizeof(int32_t));
10844 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10845 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10846 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10847 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10848 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10849 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10850 nr_sack->nr_sack.reserved = 0;
10851 nr_sack->ch.chunk_type = type;
10852 nr_sack->ch.chunk_flags = flags;
10853 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10855 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10856 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10857 asoc->ctrl_queue_cnt++;
10858 asoc->send_sack = 0;
10859 SCTP_STAT_INCR(sctps_sendsacks);
10864 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked)
10866 struct mbuf *m_abort, *m, *m_last;
10867 struct mbuf *m_out, *m_end = NULL;
10868 struct sctp_abort_chunk *abort;
10869 struct sctp_auth_chunk *auth = NULL;
10870 struct sctp_nets *net;
10872 uint32_t auth_offset = 0;
10874 uint16_t cause_len, chunk_len, padding_len;
10876 SCTP_TCB_LOCK_ASSERT(stcb);
10878 * Add an AUTH chunk, if chunk requires it and save the offset into
10879 * the chain for AUTH
10881 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10882 stcb->asoc.peer_auth_chunks)) {
10883 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10884 stcb, SCTP_ABORT_ASSOCIATION);
10885 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10889 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10890 if (m_abort == NULL) {
10892 sctp_m_freem(m_out);
10895 sctp_m_freem(operr);
10899 /* link in any error */
10900 SCTP_BUF_NEXT(m_abort) = operr;
10903 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10904 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10905 if (SCTP_BUF_NEXT(m) == NULL) {
10909 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10910 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10911 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10912 if (m_out == NULL) {
10913 /* NO Auth chunk prepended, so reserve space in front */
10914 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10917 /* Put AUTH chunk at the front of the chain */
10918 SCTP_BUF_NEXT(m_end) = m_abort;
10920 if (stcb->asoc.alternate) {
10921 net = stcb->asoc.alternate;
10923 net = stcb->asoc.primary_destination;
10925 /* Fill in the ABORT chunk header. */
10926 abort = mtod(m_abort, struct sctp_abort_chunk *);
10927 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10928 if (stcb->asoc.peer_vtag == 0) {
10929 /* This happens iff the assoc is in COOKIE-WAIT state. */
10930 vtag = stcb->asoc.my_vtag;
10931 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10933 vtag = stcb->asoc.peer_vtag;
10934 abort->ch.chunk_flags = 0;
10936 abort->ch.chunk_length = htons(chunk_len);
10937 /* Add padding, if necessary. */
10938 if (padding_len > 0) {
10939 if ((m_last == NULL) ||
10940 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10941 sctp_m_freem(m_out);
10945 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10946 (struct sockaddr *)&net->ro._l_addr,
10947 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10948 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10949 stcb->asoc.primary_destination->port, NULL,
10952 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10953 if (error == ENOBUFS) {
10954 stcb->asoc.ifp_had_enobuf = 1;
10955 SCTP_STAT_INCR(sctps_lowlevelerr);
10958 stcb->asoc.ifp_had_enobuf = 0;
10960 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10964 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10965 struct sctp_nets *net,
10968 /* formulate and SEND a SHUTDOWN-COMPLETE */
10969 struct mbuf *m_shutdown_comp;
10970 struct sctp_shutdown_complete_chunk *shutdown_complete;
10975 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10976 if (m_shutdown_comp == NULL) {
10980 if (reflect_vtag) {
10981 flags = SCTP_HAD_NO_TCB;
10982 vtag = stcb->asoc.my_vtag;
10985 vtag = stcb->asoc.peer_vtag;
10987 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10988 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10989 shutdown_complete->ch.chunk_flags = flags;
10990 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10991 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10992 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10993 (struct sockaddr *)&net->ro._l_addr,
10994 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10995 stcb->sctp_ep->sctp_lport, stcb->rport,
10999 SCTP_SO_NOT_LOCKED))) {
11000 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11001 if (error == ENOBUFS) {
11002 stcb->asoc.ifp_had_enobuf = 1;
11003 SCTP_STAT_INCR(sctps_lowlevelerr);
11006 stcb->asoc.ifp_had_enobuf = 0;
11008 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11013 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11014 struct sctphdr *sh, uint32_t vtag,
11015 uint8_t type, struct mbuf *cause,
11016 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11017 uint32_t vrf_id, uint16_t port)
11019 struct mbuf *o_pak;
11021 struct sctphdr *shout;
11022 struct sctp_chunkhdr *ch;
11023 #if defined(INET) || defined(INET6)
11024 struct udphdr *udp;
11026 int ret, len, cause_len, padding_len;
11028 struct sockaddr_in *src_sin, *dst_sin;
11032 struct sockaddr_in6 *src_sin6, *dst_sin6;
11033 struct ip6_hdr *ip6;
11036 /* Compute the length of the cause and add final padding. */
11038 if (cause != NULL) {
11039 struct mbuf *m_at, *m_last = NULL;
11041 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11042 if (SCTP_BUF_NEXT(m_at) == NULL)
11044 cause_len += SCTP_BUF_LEN(m_at);
11046 padding_len = cause_len % 4;
11047 if (padding_len != 0) {
11048 padding_len = 4 - padding_len;
11050 if (padding_len != 0) {
11051 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11052 sctp_m_freem(cause);
11059 /* Get an mbuf for the header. */
11060 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11061 switch (dst->sa_family) {
11064 len += sizeof(struct ip);
11069 len += sizeof(struct ip6_hdr);
11075 #if defined(INET) || defined(INET6)
11077 len += sizeof(struct udphdr);
11080 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11081 if (mout == NULL) {
11083 sctp_m_freem(cause);
11087 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11088 SCTP_BUF_LEN(mout) = len;
11089 SCTP_BUF_NEXT(mout) = cause;
11090 M_SETFIB(mout, fibnum);
11091 mout->m_pkthdr.flowid = mflowid;
11092 M_HASHTYPE_SET(mout, mflowtype);
11099 switch (dst->sa_family) {
11102 src_sin = (struct sockaddr_in *)src;
11103 dst_sin = (struct sockaddr_in *)dst;
11104 ip = mtod(mout, struct ip *);
11105 ip->ip_v = IPVERSION;
11106 ip->ip_hl = (sizeof(struct ip) >> 2);
11108 ip->ip_off = htons(IP_DF);
11110 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11112 ip->ip_p = IPPROTO_UDP;
11114 ip->ip_p = IPPROTO_SCTP;
11116 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11117 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11119 len = sizeof(struct ip);
11120 shout = (struct sctphdr *)((caddr_t)ip + len);
11125 src_sin6 = (struct sockaddr_in6 *)src;
11126 dst_sin6 = (struct sockaddr_in6 *)dst;
11127 ip6 = mtod(mout, struct ip6_hdr *);
11128 ip6->ip6_flow = htonl(0x60000000);
11129 if (V_ip6_auto_flowlabel) {
11130 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11132 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11134 ip6->ip6_nxt = IPPROTO_UDP;
11136 ip6->ip6_nxt = IPPROTO_SCTP;
11138 ip6->ip6_src = dst_sin6->sin6_addr;
11139 ip6->ip6_dst = src_sin6->sin6_addr;
11140 len = sizeof(struct ip6_hdr);
11141 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11146 shout = mtod(mout, struct sctphdr *);
11149 #if defined(INET) || defined(INET6)
11151 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11152 sctp_m_freem(mout);
11155 udp = (struct udphdr *)shout;
11156 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11157 udp->uh_dport = port;
11159 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11160 sizeof(struct sctphdr) +
11161 sizeof(struct sctp_chunkhdr) +
11162 cause_len + padding_len));
11163 len += sizeof(struct udphdr);
11164 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11169 shout->src_port = sh->dest_port;
11170 shout->dest_port = sh->src_port;
11171 shout->checksum = 0;
11173 shout->v_tag = htonl(vtag);
11175 shout->v_tag = sh->v_tag;
11177 len += sizeof(struct sctphdr);
11178 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11179 ch->chunk_type = type;
11181 ch->chunk_flags = 0;
11183 ch->chunk_flags = SCTP_HAD_NO_TCB;
11185 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11186 len += sizeof(struct sctp_chunkhdr);
11187 len += cause_len + padding_len;
11189 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11190 sctp_m_freem(mout);
11193 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11194 switch (dst->sa_family) {
11199 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11204 ip->ip_len = htons(len);
11206 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11207 SCTP_STAT_INCR(sctps_sendswcrc);
11209 SCTP_ENABLE_UDP_CSUM(o_pak);
11212 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11213 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11214 SCTP_STAT_INCR(sctps_sendhwcrc);
11216 #ifdef SCTP_PACKET_LOGGING
11217 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11218 sctp_packet_log(o_pak);
11221 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11222 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11227 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11229 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11230 SCTP_STAT_INCR(sctps_sendswcrc);
11231 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11232 udp->uh_sum = 0xffff;
11235 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11236 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11237 SCTP_STAT_INCR(sctps_sendhwcrc);
11239 #ifdef SCTP_PACKET_LOGGING
11240 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11241 sctp_packet_log(o_pak);
11244 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11245 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11249 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11251 sctp_m_freem(mout);
11252 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11255 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11257 UDPSTAT_INC(udps_opackets);
11259 SCTP_STAT_INCR(sctps_sendpackets);
11260 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11261 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11263 SCTP_STAT_INCR(sctps_senderrors);
11269 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11270 struct sctphdr *sh,
11271 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11272 uint32_t vrf_id, uint16_t port)
11274 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11275 mflowtype, mflowid, fibnum,
11280 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
11282 struct sctp_tmit_chunk *chk;
11283 struct sctp_heartbeat_chunk *hb;
11284 struct timeval now;
11286 SCTP_TCB_LOCK_ASSERT(stcb);
11290 (void)SCTP_GETTIME_TIMEVAL(&now);
11291 switch (net->ro._l_addr.sa.sa_family) {
11303 sctp_alloc_a_chunk(stcb, chk);
11305 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11309 chk->copy_by_ref = 0;
11310 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11311 chk->rec.chunk_id.can_take_data = 1;
11313 chk->asoc = &stcb->asoc;
11314 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11316 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11317 if (chk->data == NULL) {
11318 sctp_free_a_chunk(stcb, chk, so_locked);
11321 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11322 SCTP_BUF_LEN(chk->data) = chk->send_size;
11323 chk->sent = SCTP_DATAGRAM_UNSENT;
11324 chk->snd_count = 0;
11326 atomic_add_int(&chk->whoTo->ref_count, 1);
11327 /* Now we have a mbuf that we can fill in with the details */
11328 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11329 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11330 /* fill out chunk header */
11331 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11332 hb->ch.chunk_flags = 0;
11333 hb->ch.chunk_length = htons(chk->send_size);
11334 /* Fill out hb parameter */
11335 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11336 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11337 hb->heartbeat.hb_info.time_value_1 = (uint32_t)now.tv_sec;
11338 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11339 /* Did our user request this one, put it in */
11340 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11341 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11342 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11344 * we only take from the entropy pool if the address is not
11347 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11348 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11350 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11351 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11353 switch (net->ro._l_addr.sa.sa_family) {
11356 memcpy(hb->heartbeat.hb_info.address,
11357 &net->ro._l_addr.sin.sin_addr,
11358 sizeof(net->ro._l_addr.sin.sin_addr));
11363 memcpy(hb->heartbeat.hb_info.address,
11364 &net->ro._l_addr.sin6.sin6_addr,
11365 sizeof(net->ro._l_addr.sin6.sin6_addr));
11370 sctp_m_freem(chk->data);
11373 sctp_free_a_chunk(stcb, chk, so_locked);
11377 net->hb_responded = 0;
11378 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11379 stcb->asoc.ctrl_queue_cnt++;
11380 SCTP_STAT_INCR(sctps_sendheartbeat);
11385 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11388 struct sctp_association *asoc;
11389 struct sctp_ecne_chunk *ecne;
11390 struct sctp_tmit_chunk *chk;
11395 asoc = &stcb->asoc;
11396 SCTP_TCB_LOCK_ASSERT(stcb);
11397 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11398 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11399 /* found a previous ECN_ECHO update it if needed */
11400 uint32_t cnt, ctsn;
11402 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11403 ctsn = ntohl(ecne->tsn);
11404 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11405 ecne->tsn = htonl(high_tsn);
11406 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11408 cnt = ntohl(ecne->num_pkts_since_cwr);
11410 ecne->num_pkts_since_cwr = htonl(cnt);
11414 /* nope could not find one to update so we must build one */
11415 sctp_alloc_a_chunk(stcb, chk);
11419 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11420 chk->copy_by_ref = 0;
11421 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11422 chk->rec.chunk_id.can_take_data = 0;
11424 chk->asoc = &stcb->asoc;
11425 chk->send_size = sizeof(struct sctp_ecne_chunk);
11426 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11427 if (chk->data == NULL) {
11428 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11431 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11432 SCTP_BUF_LEN(chk->data) = chk->send_size;
11433 chk->sent = SCTP_DATAGRAM_UNSENT;
11434 chk->snd_count = 0;
11436 atomic_add_int(&chk->whoTo->ref_count, 1);
11438 stcb->asoc.ecn_echo_cnt_onq++;
11439 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11440 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11441 ecne->ch.chunk_flags = 0;
11442 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11443 ecne->tsn = htonl(high_tsn);
11444 ecne->num_pkts_since_cwr = htonl(1);
11445 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11446 asoc->ctrl_queue_cnt++;
11450 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11451 struct mbuf *m, int len, int iphlen, int bad_crc)
11453 struct sctp_association *asoc;
11454 struct sctp_pktdrop_chunk *drp;
11455 struct sctp_tmit_chunk *chk;
11461 struct sctp_chunkhdr *ch, chunk_buf;
11462 unsigned int chk_length;
11467 asoc = &stcb->asoc;
11468 SCTP_TCB_LOCK_ASSERT(stcb);
11469 if (asoc->pktdrop_supported == 0) {
11471 * peer must declare support before I send one.
11475 if (stcb->sctp_socket == NULL) {
11478 sctp_alloc_a_chunk(stcb, chk);
11482 chk->copy_by_ref = 0;
11483 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11484 chk->rec.chunk_id.can_take_data = 1;
11487 chk->send_size = len;
11488 /* Validate that we do not have an ABORT in here. */
11489 offset = iphlen + sizeof(struct sctphdr);
11490 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11491 sizeof(*ch), (uint8_t *)&chunk_buf);
11492 while (ch != NULL) {
11493 chk_length = ntohs(ch->chunk_length);
11494 if (chk_length < sizeof(*ch)) {
11495 /* break to abort land */
11498 switch (ch->chunk_type) {
11499 case SCTP_PACKET_DROPPED:
11500 case SCTP_ABORT_ASSOCIATION:
11501 case SCTP_INITIATION_ACK:
11503 * We don't respond with an PKT-DROP to an ABORT
11504 * or PKT-DROP. We also do not respond to an
11505 * INIT-ACK, because we can't know if the initiation
11506 * tag is correct or not.
11508 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11513 offset += SCTP_SIZE32(chk_length);
11514 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11515 sizeof(*ch), (uint8_t *)&chunk_buf);
11518 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11519 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11521 * only send 1 mtu worth, trim off the excess on the end.
11524 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11527 chk->asoc = &stcb->asoc;
11528 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11529 if (chk->data == NULL) {
11531 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11534 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11535 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11537 sctp_m_freem(chk->data);
11541 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11542 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11543 chk->book_size_scale = 0;
11545 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11546 drp->trunc_len = htons(fullsz);
11548 * Len is already adjusted to size minus overhead above take
11549 * out the pkt_drop chunk itself from it.
11551 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11552 len = chk->send_size;
11554 /* no truncation needed */
11555 drp->ch.chunk_flags = 0;
11556 drp->trunc_len = htons(0);
11559 drp->ch.chunk_flags |= SCTP_BADCRC;
11561 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11562 SCTP_BUF_LEN(chk->data) = chk->send_size;
11563 chk->sent = SCTP_DATAGRAM_UNSENT;
11564 chk->snd_count = 0;
11566 /* we should hit here */
11568 atomic_add_int(&chk->whoTo->ref_count, 1);
11572 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11573 drp->ch.chunk_length = htons(chk->send_size);
11574 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11578 drp->bottle_bw = htonl(spc);
11579 if (asoc->my_rwnd) {
11580 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11581 asoc->size_on_all_streams +
11582 asoc->my_rwnd_control_len +
11583 stcb->sctp_socket->so_rcv.sb_cc);
11586 * If my rwnd is 0, possibly from mbuf depletion as well as
11587 * space used, tell the peer there is NO space aka onq == bw
11589 drp->current_onq = htonl(spc);
11593 m_copydata(m, iphlen, len, (caddr_t)datap);
11594 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11595 asoc->ctrl_queue_cnt++;
11599 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11601 struct sctp_association *asoc;
11602 struct sctp_cwr_chunk *cwr;
11603 struct sctp_tmit_chunk *chk;
11605 SCTP_TCB_LOCK_ASSERT(stcb);
11609 asoc = &stcb->asoc;
11610 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11611 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11613 * found a previous CWR queued to same destination
11614 * update it if needed
11618 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11619 ctsn = ntohl(cwr->tsn);
11620 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11621 cwr->tsn = htonl(high_tsn);
11623 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11624 /* Make sure override is carried */
11625 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11630 sctp_alloc_a_chunk(stcb, chk);
11634 chk->copy_by_ref = 0;
11635 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11636 chk->rec.chunk_id.can_take_data = 1;
11638 chk->asoc = &stcb->asoc;
11639 chk->send_size = sizeof(struct sctp_cwr_chunk);
11640 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11641 if (chk->data == NULL) {
11642 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11645 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11646 SCTP_BUF_LEN(chk->data) = chk->send_size;
11647 chk->sent = SCTP_DATAGRAM_UNSENT;
11648 chk->snd_count = 0;
11650 atomic_add_int(&chk->whoTo->ref_count, 1);
11651 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11652 cwr->ch.chunk_type = SCTP_ECN_CWR;
11653 cwr->ch.chunk_flags = override;
11654 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11655 cwr->tsn = htonl(high_tsn);
11656 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11657 asoc->ctrl_queue_cnt++;
11661 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11662 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11664 uint16_t len, old_len, i;
11665 struct sctp_stream_reset_out_request *req_out;
11666 struct sctp_chunkhdr *ch;
11668 int number_entries = 0;
11670 ch = mtod(chk->data, struct sctp_chunkhdr *);
11671 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11672 /* get to new offset for the param. */
11673 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11674 /* now how long will this param be? */
11675 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11676 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11677 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11678 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11682 if (number_entries == 0) {
11685 if (number_entries == stcb->asoc.streamoutcnt) {
11686 number_entries = 0;
11688 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11689 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11691 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11692 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11693 req_out->ph.param_length = htons(len);
11694 req_out->request_seq = htonl(seq);
11695 req_out->response_seq = htonl(resp_seq);
11696 req_out->send_reset_at_tsn = htonl(last_sent);
11698 if (number_entries) {
11699 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11700 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11701 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11702 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11703 req_out->list_of_streams[at] = htons(i);
11705 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11706 if (at >= number_entries) {
11712 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11713 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11716 if (SCTP_SIZE32(len) > len) {
11718 * Need to worry about the pad we may end up adding to the
11719 * end. This is easy since the struct is either aligned to 4
11720 * bytes or 2 bytes off.
11722 req_out->list_of_streams[number_entries] = 0;
11724 /* now fix the chunk length */
11725 ch->chunk_length = htons(len + old_len);
11726 chk->book_size = len + old_len;
11727 chk->book_size_scale = 0;
11728 chk->send_size = SCTP_SIZE32(chk->book_size);
11729 SCTP_BUF_LEN(chk->data) = chk->send_size;
11734 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11735 int number_entries, uint16_t *list,
11738 uint16_t len, old_len, i;
11739 struct sctp_stream_reset_in_request *req_in;
11740 struct sctp_chunkhdr *ch;
11742 ch = mtod(chk->data, struct sctp_chunkhdr *);
11743 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11745 /* get to new offset for the param. */
11746 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11747 /* now how long will this param be? */
11748 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11749 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11750 req_in->ph.param_length = htons(len);
11751 req_in->request_seq = htonl(seq);
11752 if (number_entries) {
11753 for (i = 0; i < number_entries; i++) {
11754 req_in->list_of_streams[i] = htons(list[i]);
11757 if (SCTP_SIZE32(len) > len) {
11759 * Need to worry about the pad we may end up adding to the
11760 * end. This is easy since the struct is either aligned to 4
11761 * bytes or 2 bytes off.
11763 req_in->list_of_streams[number_entries] = 0;
11765 /* now fix the chunk length */
11766 ch->chunk_length = htons(len + old_len);
11767 chk->book_size = len + old_len;
11768 chk->book_size_scale = 0;
11769 chk->send_size = SCTP_SIZE32(chk->book_size);
11770 SCTP_BUF_LEN(chk->data) = chk->send_size;
11775 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11778 uint16_t len, old_len;
11779 struct sctp_stream_reset_tsn_request *req_tsn;
11780 struct sctp_chunkhdr *ch;
11782 ch = mtod(chk->data, struct sctp_chunkhdr *);
11783 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11785 /* get to new offset for the param. */
11786 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11787 /* now how long will this param be? */
11788 len = sizeof(struct sctp_stream_reset_tsn_request);
11789 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11790 req_tsn->ph.param_length = htons(len);
11791 req_tsn->request_seq = htonl(seq);
11793 /* now fix the chunk length */
11794 ch->chunk_length = htons(len + old_len);
11795 chk->send_size = len + old_len;
11796 chk->book_size = SCTP_SIZE32(chk->send_size);
11797 chk->book_size_scale = 0;
11798 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11803 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11804 uint32_t resp_seq, uint32_t result)
11806 uint16_t len, old_len;
11807 struct sctp_stream_reset_response *resp;
11808 struct sctp_chunkhdr *ch;
11810 ch = mtod(chk->data, struct sctp_chunkhdr *);
11811 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11813 /* get to new offset for the param. */
11814 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11815 /* now how long will this param be? */
11816 len = sizeof(struct sctp_stream_reset_response);
11817 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11818 resp->ph.param_length = htons(len);
11819 resp->response_seq = htonl(resp_seq);
11820 resp->result = ntohl(result);
11822 /* now fix the chunk length */
11823 ch->chunk_length = htons(len + old_len);
11824 chk->book_size = len + old_len;
11825 chk->book_size_scale = 0;
11826 chk->send_size = SCTP_SIZE32(chk->book_size);
11827 SCTP_BUF_LEN(chk->data) = chk->send_size;
11832 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11833 struct sctp_stream_reset_list *ent,
11836 struct sctp_association *asoc;
11837 struct sctp_tmit_chunk *chk;
11838 struct sctp_chunkhdr *ch;
11840 asoc = &stcb->asoc;
11843 * Reset our last reset action to the new one IP -> response
11844 * (PERFORMED probably). This assures that if we fail to send, a
11845 * retran from the peer will get the new response.
11847 asoc->last_reset_action[0] = response;
11848 if (asoc->stream_reset_outstanding) {
11851 sctp_alloc_a_chunk(stcb, chk);
11853 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11856 chk->copy_by_ref = 0;
11857 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11858 chk->rec.chunk_id.can_take_data = 0;
11860 chk->asoc = &stcb->asoc;
11861 chk->book_size = sizeof(struct sctp_chunkhdr);
11862 chk->send_size = SCTP_SIZE32(chk->book_size);
11863 chk->book_size_scale = 0;
11864 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11865 if (chk->data == NULL) {
11866 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11867 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11870 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11871 /* setup chunk parameters */
11872 chk->sent = SCTP_DATAGRAM_UNSENT;
11873 chk->snd_count = 0;
11874 if (stcb->asoc.alternate) {
11875 chk->whoTo = stcb->asoc.alternate;
11877 chk->whoTo = stcb->asoc.primary_destination;
11879 ch = mtod(chk->data, struct sctp_chunkhdr *);
11880 ch->chunk_type = SCTP_STREAM_RESET;
11881 ch->chunk_flags = 0;
11882 ch->chunk_length = htons(chk->book_size);
11883 atomic_add_int(&chk->whoTo->ref_count, 1);
11884 SCTP_BUF_LEN(chk->data) = chk->send_size;
11885 sctp_add_stream_reset_result(chk, ent->seq, response);
11886 /* insert the chunk for sending */
11887 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11890 asoc->ctrl_queue_cnt++;
11894 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11895 uint32_t resp_seq, uint32_t result,
11896 uint32_t send_una, uint32_t recv_next)
11898 uint16_t len, old_len;
11899 struct sctp_stream_reset_response_tsn *resp;
11900 struct sctp_chunkhdr *ch;
11902 ch = mtod(chk->data, struct sctp_chunkhdr *);
11903 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11905 /* get to new offset for the param. */
11906 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11907 /* now how long will this param be? */
11908 len = sizeof(struct sctp_stream_reset_response_tsn);
11909 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11910 resp->ph.param_length = htons(len);
11911 resp->response_seq = htonl(resp_seq);
11912 resp->result = htonl(result);
11913 resp->senders_next_tsn = htonl(send_una);
11914 resp->receivers_next_tsn = htonl(recv_next);
11916 /* now fix the chunk length */
11917 ch->chunk_length = htons(len + old_len);
11918 chk->book_size = len + old_len;
11919 chk->send_size = SCTP_SIZE32(chk->book_size);
11920 chk->book_size_scale = 0;
11921 SCTP_BUF_LEN(chk->data) = chk->send_size;
11926 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11930 uint16_t len, old_len;
11931 struct sctp_chunkhdr *ch;
11932 struct sctp_stream_reset_add_strm *addstr;
11934 ch = mtod(chk->data, struct sctp_chunkhdr *);
11935 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11937 /* get to new offset for the param. */
11938 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11939 /* now how long will this param be? */
11940 len = sizeof(struct sctp_stream_reset_add_strm);
11943 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11944 addstr->ph.param_length = htons(len);
11945 addstr->request_seq = htonl(seq);
11946 addstr->number_of_streams = htons(adding);
11947 addstr->reserved = 0;
11949 /* now fix the chunk length */
11950 ch->chunk_length = htons(len + old_len);
11951 chk->send_size = len + old_len;
11952 chk->book_size = SCTP_SIZE32(chk->send_size);
11953 chk->book_size_scale = 0;
11954 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11959 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11963 uint16_t len, old_len;
11964 struct sctp_chunkhdr *ch;
11965 struct sctp_stream_reset_add_strm *addstr;
11967 ch = mtod(chk->data, struct sctp_chunkhdr *);
11968 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11970 /* get to new offset for the param. */
11971 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11972 /* now how long will this param be? */
11973 len = sizeof(struct sctp_stream_reset_add_strm);
11975 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11976 addstr->ph.param_length = htons(len);
11977 addstr->request_seq = htonl(seq);
11978 addstr->number_of_streams = htons(adding);
11979 addstr->reserved = 0;
11981 /* now fix the chunk length */
11982 ch->chunk_length = htons(len + old_len);
11983 chk->send_size = len + old_len;
11984 chk->book_size = SCTP_SIZE32(chk->send_size);
11985 chk->book_size_scale = 0;
11986 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11991 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11993 struct sctp_association *asoc;
11994 struct sctp_tmit_chunk *chk;
11995 struct sctp_chunkhdr *ch;
11998 asoc = &stcb->asoc;
11999 asoc->trigger_reset = 0;
12000 if (asoc->stream_reset_outstanding) {
12003 sctp_alloc_a_chunk(stcb, chk);
12005 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12008 chk->copy_by_ref = 0;
12009 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12010 chk->rec.chunk_id.can_take_data = 0;
12012 chk->asoc = &stcb->asoc;
12013 chk->book_size = sizeof(struct sctp_chunkhdr);
12014 chk->send_size = SCTP_SIZE32(chk->book_size);
12015 chk->book_size_scale = 0;
12016 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12017 if (chk->data == NULL) {
12018 sctp_free_a_chunk(stcb, chk, so_locked);
12019 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12022 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12024 /* setup chunk parameters */
12025 chk->sent = SCTP_DATAGRAM_UNSENT;
12026 chk->snd_count = 0;
12027 if (stcb->asoc.alternate) {
12028 chk->whoTo = stcb->asoc.alternate;
12030 chk->whoTo = stcb->asoc.primary_destination;
12032 ch = mtod(chk->data, struct sctp_chunkhdr *);
12033 ch->chunk_type = SCTP_STREAM_RESET;
12034 ch->chunk_flags = 0;
12035 ch->chunk_length = htons(chk->book_size);
12036 atomic_add_int(&chk->whoTo->ref_count, 1);
12037 SCTP_BUF_LEN(chk->data) = chk->send_size;
12038 seq = stcb->asoc.str_reset_seq_out;
12039 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12041 asoc->stream_reset_outstanding++;
12043 m_freem(chk->data);
12045 sctp_free_a_chunk(stcb, chk, so_locked);
12048 asoc->str_reset = chk;
12049 /* insert the chunk for sending */
12050 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12053 asoc->ctrl_queue_cnt++;
12055 if (stcb->asoc.send_sack) {
12056 sctp_send_sack(stcb, so_locked);
12058 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12063 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12064 uint16_t number_entries, uint16_t *list,
12065 uint8_t send_in_req,
12066 uint8_t send_tsn_req,
12067 uint8_t add_stream,
12069 uint16_t adding_i, uint8_t peer_asked)
12071 struct sctp_association *asoc;
12072 struct sctp_tmit_chunk *chk;
12073 struct sctp_chunkhdr *ch;
12074 int can_send_out_req = 0;
12077 asoc = &stcb->asoc;
12078 if (asoc->stream_reset_outstanding) {
12080 * Already one pending, must get ACK back to clear the flag.
12082 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12085 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12086 (add_stream == 0)) {
12087 /* nothing to do */
12088 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12091 if (send_tsn_req && send_in_req) {
12092 /* error, can't do that */
12093 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12095 } else if (send_in_req) {
12096 can_send_out_req = 1;
12098 if (number_entries > (MCLBYTES -
12099 SCTP_MIN_OVERHEAD -
12100 sizeof(struct sctp_chunkhdr) -
12101 sizeof(struct sctp_stream_reset_out_request)) /
12102 sizeof(uint16_t)) {
12103 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12106 sctp_alloc_a_chunk(stcb, chk);
12108 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12111 chk->copy_by_ref = 0;
12112 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12113 chk->rec.chunk_id.can_take_data = 0;
12115 chk->asoc = &stcb->asoc;
12116 chk->book_size = sizeof(struct sctp_chunkhdr);
12117 chk->send_size = SCTP_SIZE32(chk->book_size);
12118 chk->book_size_scale = 0;
12119 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12120 if (chk->data == NULL) {
12121 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12122 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12125 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12127 /* setup chunk parameters */
12128 chk->sent = SCTP_DATAGRAM_UNSENT;
12129 chk->snd_count = 0;
12130 if (stcb->asoc.alternate) {
12131 chk->whoTo = stcb->asoc.alternate;
12133 chk->whoTo = stcb->asoc.primary_destination;
12135 atomic_add_int(&chk->whoTo->ref_count, 1);
12136 ch = mtod(chk->data, struct sctp_chunkhdr *);
12137 ch->chunk_type = SCTP_STREAM_RESET;
12138 ch->chunk_flags = 0;
12139 ch->chunk_length = htons(chk->book_size);
12140 SCTP_BUF_LEN(chk->data) = chk->send_size;
12142 seq = stcb->asoc.str_reset_seq_out;
12143 if (can_send_out_req) {
12146 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12149 asoc->stream_reset_outstanding++;
12152 if ((add_stream & 1) &&
12153 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12154 /* Need to allocate more */
12155 struct sctp_stream_out *oldstream;
12156 struct sctp_stream_queue_pending *sp, *nsp;
12158 #if defined(SCTP_DETAILED_STR_STATS)
12162 oldstream = stcb->asoc.strmout;
12163 /* get some more */
12164 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12165 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12167 if (stcb->asoc.strmout == NULL) {
12170 stcb->asoc.strmout = oldstream;
12171 /* Turn off the bit */
12172 x = add_stream & 0xfe;
12177 * Ok now we proceed with copying the old out stuff and
12178 * initializing the new stuff.
12180 SCTP_TCB_SEND_LOCK(stcb);
12181 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, false);
12182 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12183 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12184 /* FIX ME FIX ME */
12186 * This should be a SS_COPY operation FIX ME STREAM
12189 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12190 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12191 #if defined(SCTP_DETAILED_STR_STATS)
12192 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12193 stcb->asoc.strmout[i].abandoned_sent[j] = oldstream[i].abandoned_sent[j];
12194 stcb->asoc.strmout[i].abandoned_unsent[j] = oldstream[i].abandoned_unsent[j];
12197 stcb->asoc.strmout[i].abandoned_sent[0] = oldstream[i].abandoned_sent[0];
12198 stcb->asoc.strmout[i].abandoned_unsent[0] = oldstream[i].abandoned_unsent[0];
12200 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12201 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12202 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12203 stcb->asoc.strmout[i].sid = i;
12204 stcb->asoc.strmout[i].state = oldstream[i].state;
12205 /* now anything on those queues? */
12206 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12207 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12208 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12211 /* now the new streams */
12212 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc);
12213 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12214 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12215 stcb->asoc.strmout[i].chunks_on_queues = 0;
12216 #if defined(SCTP_DETAILED_STR_STATS)
12217 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12218 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12219 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12222 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12223 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12225 stcb->asoc.strmout[i].next_mid_ordered = 0;
12226 stcb->asoc.strmout[i].next_mid_unordered = 0;
12227 stcb->asoc.strmout[i].sid = i;
12228 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12229 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12230 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12232 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12233 SCTP_FREE(oldstream, SCTP_M_STRMO);
12234 SCTP_TCB_SEND_UNLOCK(stcb);
12237 if ((add_stream & 1) && (adding_o > 0)) {
12238 asoc->strm_pending_add_size = adding_o;
12239 asoc->peer_req_out = peer_asked;
12240 sctp_add_an_out_stream(chk, seq, adding_o);
12242 asoc->stream_reset_outstanding++;
12244 if ((add_stream & 2) && (adding_i > 0)) {
12245 sctp_add_an_in_stream(chk, seq, adding_i);
12247 asoc->stream_reset_outstanding++;
12250 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12252 asoc->stream_reset_outstanding++;
12254 if (send_tsn_req) {
12255 sctp_add_stream_reset_tsn(chk, seq);
12256 asoc->stream_reset_outstanding++;
12258 asoc->str_reset = chk;
12259 /* insert the chunk for sending */
12260 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12263 asoc->ctrl_queue_cnt++;
12264 if (stcb->asoc.send_sack) {
12265 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12267 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12272 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12273 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12274 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12275 uint32_t vrf_id, uint16_t port)
12277 /* Don't respond to an ABORT with an ABORT. */
12278 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12280 sctp_m_freem(cause);
12283 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12284 mflowtype, mflowid, fibnum,
12290 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12291 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12292 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12293 uint32_t vrf_id, uint16_t port)
12295 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12296 mflowtype, mflowid, fibnum,
12301 static struct mbuf *
12302 sctp_copy_resume(struct uio *uio,
12304 int user_marks_eor,
12307 struct mbuf **new_tail)
12311 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12312 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12314 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12317 *sndout = m_length(m, NULL);
12318 *new_tail = m_last(m);
12324 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12328 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12330 if (sp->data == NULL) {
12331 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12335 sp->tail_mbuf = m_last(sp->data);
12339 static struct sctp_stream_queue_pending *
12340 sctp_copy_it_in(struct sctp_tcb *stcb,
12341 struct sctp_association *asoc,
12342 struct sctp_sndrcvinfo *srcv,
12344 struct sctp_nets *net,
12345 ssize_t max_send_len,
12346 int user_marks_eor,
12351 * This routine must be very careful in its work. Protocol
12352 * processing is up and running so care must be taken to spl...()
12353 * when you need to do something that may effect the stcb/asoc. The
12354 * sb is locked however. When data is copied the protocol processing
12355 * should be enabled since this is a slower operation...
12357 struct sctp_stream_queue_pending *sp = NULL;
12361 /* Now can we send this? */
12362 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12363 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12364 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12365 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12366 /* got data while shutting down */
12367 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12368 *error = ECONNRESET;
12371 sctp_alloc_a_strmoq(stcb, sp);
12373 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12378 sp->sender_all_done = 0;
12379 sp->sinfo_flags = srcv->sinfo_flags;
12380 sp->timetolive = srcv->sinfo_timetolive;
12381 sp->ppid = srcv->sinfo_ppid;
12382 sp->context = srcv->sinfo_context;
12384 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12386 sp->sid = srcv->sinfo_stream;
12387 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12388 if ((sp->length == (uint32_t)uio->uio_resid) &&
12389 ((user_marks_eor == 0) ||
12390 (srcv->sinfo_flags & SCTP_EOF) ||
12391 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12392 sp->msg_is_complete = 1;
12394 sp->msg_is_complete = 0;
12396 sp->sender_all_done = 0;
12397 sp->some_taken = 0;
12398 sp->put_last_out = 0;
12399 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12400 sp->data = sp->tail_mbuf = NULL;
12401 if (sp->length == 0) {
12404 if (srcv->sinfo_keynumber_valid) {
12405 sp->auth_keyid = srcv->sinfo_keynumber;
12407 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12409 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12410 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12411 sp->holds_key_ref = 1;
12413 *error = sctp_copy_one(sp, uio, resv_in_first);
12416 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12419 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12421 atomic_add_int(&sp->net->ref_count, 1);
12425 sctp_set_prsctp_policy(sp);
12432 sctp_sosend(struct socket *so,
12433 struct sockaddr *addr,
12436 struct mbuf *control,
12441 int error, use_sndinfo = 0;
12442 struct sctp_sndrcvinfo sndrcvninfo;
12443 struct sockaddr *addr_to_use;
12444 #if defined(INET) && defined(INET6)
12445 struct sockaddr_in sin;
12449 /* process cmsg snd/rcv info (maybe a assoc-id) */
12450 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12451 sizeof(sndrcvninfo))) {
12456 addr_to_use = addr;
12457 #if defined(INET) && defined(INET6)
12458 if ((addr != NULL) && (addr->sa_family == AF_INET6)) {
12459 struct sockaddr_in6 *sin6;
12461 if (addr->sa_len != sizeof(struct sockaddr_in6)) {
12462 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12465 sin6 = (struct sockaddr_in6 *)addr;
12466 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12467 in6_sin6_2_sin(&sin, sin6);
12468 addr_to_use = (struct sockaddr *)&sin;
12472 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12475 use_sndinfo ? &sndrcvninfo : NULL
12482 sctp_lower_sosend(struct socket *so,
12483 struct sockaddr *addr,
12485 struct mbuf *i_pak,
12486 struct mbuf *control,
12488 struct sctp_sndrcvinfo *srcv
12493 struct epoch_tracker et;
12494 ssize_t sndlen = 0, max_len, local_add_more;
12496 struct mbuf *top = NULL;
12497 int queue_only = 0, queue_only_for_init = 0;
12498 int free_cnt_applied = 0;
12500 int now_filled = 0;
12501 unsigned int inqueue_bytes = 0;
12502 struct sctp_block_entry be;
12503 struct sctp_inpcb *inp;
12504 struct sctp_tcb *stcb = NULL;
12505 struct timeval now;
12506 struct sctp_nets *net;
12507 struct sctp_association *asoc;
12508 struct sctp_inpcb *t_inp;
12509 int user_marks_eor;
12510 int create_lock_applied = 0;
12511 int nagle_applies = 0;
12512 int some_on_control = 0;
12513 int got_all_of_the_send = 0;
12514 int hold_tcblock = 0;
12515 int non_blocking = 0;
12516 ssize_t local_soresv = 0;
12518 uint16_t sinfo_flags;
12519 sctp_assoc_t sinfo_assoc_id;
12526 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12528 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12531 SCTP_RELEASE_PKT(i_pak);
12535 if ((uio == NULL) && (i_pak == NULL)) {
12536 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12539 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12540 atomic_add_int(&inp->total_sends, 1);
12542 if (uio->uio_resid < 0) {
12543 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12546 sndlen = uio->uio_resid;
12548 top = SCTP_HEADER_TO_CHAIN(i_pak);
12549 sndlen = SCTP_HEADER_LEN(i_pak);
12551 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zd\n",
12554 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12555 SCTP_IS_LISTENING(inp)) {
12556 /* The listener can NOT send */
12557 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12562 * Pre-screen address, if one is given the sin-len
12563 * must be set correctly!
12566 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12568 switch (raddr->sa.sa_family) {
12571 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12572 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12576 port = raddr->sin.sin_port;
12581 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12582 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12586 port = raddr->sin6.sin6_port;
12590 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12591 error = EAFNOSUPPORT;
12598 sinfo_flags = srcv->sinfo_flags;
12599 sinfo_assoc_id = srcv->sinfo_assoc_id;
12600 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12601 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12602 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12606 if (srcv->sinfo_flags)
12607 SCTP_STAT_INCR(sctps_sends_with_flags);
12609 sinfo_flags = inp->def_send.sinfo_flags;
12610 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12612 if (flags & MSG_EOR) {
12613 sinfo_flags |= SCTP_EOR;
12615 if (flags & MSG_EOF) {
12616 sinfo_flags |= SCTP_EOF;
12618 if (sinfo_flags & SCTP_SENDALL) {
12619 /* its a sendall */
12620 error = sctp_sendall(inp, uio, top, srcv);
12624 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12625 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12629 /* now we must find the assoc */
12630 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12631 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12632 SCTP_INP_RLOCK(inp);
12633 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12635 SCTP_TCB_LOCK(stcb);
12638 SCTP_INP_RUNLOCK(inp);
12639 } else if (sinfo_assoc_id) {
12640 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12641 if (stcb != NULL) {
12646 * Since we did not use findep we must
12647 * increment it, and if we don't find a tcb
12650 SCTP_INP_WLOCK(inp);
12651 SCTP_INP_INCR_REF(inp);
12652 SCTP_INP_WUNLOCK(inp);
12653 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12654 if (stcb == NULL) {
12655 SCTP_INP_WLOCK(inp);
12656 SCTP_INP_DECR_REF(inp);
12657 SCTP_INP_WUNLOCK(inp);
12662 if ((stcb == NULL) && (addr)) {
12663 /* Possible implicit send? */
12664 SCTP_ASOC_CREATE_LOCK(inp);
12665 create_lock_applied = 1;
12666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12667 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12668 /* Should I really unlock ? */
12669 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12673 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12674 (addr->sa_family == AF_INET6)) {
12675 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12679 SCTP_INP_WLOCK(inp);
12680 SCTP_INP_INCR_REF(inp);
12681 SCTP_INP_WUNLOCK(inp);
12682 /* With the lock applied look again */
12683 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12684 #if defined(INET) || defined(INET6)
12685 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12686 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12689 if (stcb == NULL) {
12690 SCTP_INP_WLOCK(inp);
12691 SCTP_INP_DECR_REF(inp);
12692 SCTP_INP_WUNLOCK(inp);
12699 if (t_inp != inp) {
12700 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12705 if (stcb == NULL) {
12706 if (addr == NULL) {
12707 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12711 /* We must go ahead and start the INIT process */
12714 if ((sinfo_flags & SCTP_ABORT) ||
12715 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12717 * User asks to abort a non-existent assoc,
12718 * or EOF a non-existent assoc with no data
12720 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12724 /* get an asoc/stcb struct */
12725 vrf_id = inp->def_vrf_id;
12727 if (create_lock_applied == 0) {
12728 panic("Error, should hold create lock and I don't?");
12731 stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id,
12732 inp->sctp_ep.pre_open_stream_count,
12735 SCTP_INITIALIZE_AUTH_PARAMS);
12736 if (stcb == NULL) {
12737 /* Error is setup for us in the call */
12741 if (create_lock_applied) {
12742 SCTP_ASOC_CREATE_UNLOCK(inp);
12743 create_lock_applied = 0;
12745 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12748 * Turn on queue only flag to prevent data from
12752 asoc = &stcb->asoc;
12753 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12754 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12757 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12758 sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
12759 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
12765 /* out with the INIT */
12766 queue_only_for_init = 1;
12768 * we may want to dig in after this call and adjust the MTU
12769 * value. It defaulted to 1500 (constant) but the ro
12770 * structure may now have an update and thus we may need to
12771 * change it BEFORE we append the message.
12775 asoc = &stcb->asoc;
12776 if (srcv == NULL) {
12777 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12778 sinfo_flags = srcv->sinfo_flags;
12779 if (flags & MSG_EOR) {
12780 sinfo_flags |= SCTP_EOR;
12782 if (flags & MSG_EOF) {
12783 sinfo_flags |= SCTP_EOF;
12786 if (sinfo_flags & SCTP_ADDR_OVER) {
12788 net = sctp_findnet(stcb, addr);
12791 if ((net == NULL) ||
12792 ((port != 0) && (port != stcb->rport))) {
12793 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12798 if (stcb->asoc.alternate) {
12799 net = stcb->asoc.alternate;
12801 net = stcb->asoc.primary_destination;
12804 atomic_add_int(&stcb->total_sends, 1);
12805 /* Keep the stcb from being freed under our feet */
12806 atomic_add_int(&asoc->refcnt, 1);
12807 free_cnt_applied = 1;
12809 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12810 if (sndlen > (ssize_t)asoc->smallest_mtu) {
12811 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12816 if (SCTP_SO_IS_NBIO(so)
12817 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12821 /* would we block? */
12822 if (non_blocking) {
12825 if (hold_tcblock == 0) {
12826 SCTP_TCB_LOCK(stcb);
12829 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12830 if (user_marks_eor == 0) {
12835 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12836 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12837 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12838 if (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so))
12841 error = EWOULDBLOCK;
12844 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12845 SCTP_TCB_UNLOCK(stcb);
12848 atomic_add_int(&stcb->asoc.sb_send_resv, (int)sndlen);
12850 local_soresv = sndlen;
12851 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12852 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12853 error = ECONNRESET;
12856 if (create_lock_applied) {
12857 SCTP_ASOC_CREATE_UNLOCK(inp);
12858 create_lock_applied = 0;
12860 /* Is the stream no. valid? */
12861 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12862 /* Invalid stream number */
12863 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12867 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12868 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12870 * Can't queue any data while stream reset is underway.
12872 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12877 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12880 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12881 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12884 /* we are now done with all control */
12886 sctp_m_freem(control);
12889 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12890 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12891 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12892 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12893 if (sinfo_flags & SCTP_ABORT) {
12896 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12897 error = ECONNRESET;
12901 /* Ok, we will attempt a msgsnd :> */
12903 p->td_ru.ru_msgsnd++;
12905 /* Are we aborting? */
12906 if (sinfo_flags & SCTP_ABORT) {
12908 ssize_t tot_demand, tot_out = 0, max_out;
12910 SCTP_STAT_INCR(sctps_sends_with_abort);
12911 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12912 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12913 /* It has to be up before we abort */
12914 /* how big is the user initiated abort? */
12915 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12919 if (hold_tcblock) {
12920 SCTP_TCB_UNLOCK(stcb);
12924 struct mbuf *cntm = NULL;
12926 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12928 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12929 tot_out += SCTP_BUF_LEN(cntm);
12933 /* Must fit in a MTU */
12935 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12936 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12938 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12942 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12945 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12949 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12950 max_out -= sizeof(struct sctp_abort_msg);
12951 if (tot_out > max_out) {
12955 struct sctp_paramhdr *ph;
12957 /* now move forward the data pointer */
12958 ph = mtod(mm, struct sctp_paramhdr *);
12959 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12960 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12962 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
12964 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12967 * Here if we can't get his data we
12968 * still abort we just don't get to
12969 * send the users note :-0
12976 SCTP_BUF_NEXT(mm) = top;
12980 if (hold_tcblock == 0) {
12981 SCTP_TCB_LOCK(stcb);
12983 atomic_subtract_int(&stcb->asoc.refcnt, 1);
12984 free_cnt_applied = 0;
12985 /* release this lock, otherwise we hang on ourselves */
12986 NET_EPOCH_ENTER(et);
12987 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, false, SCTP_SO_LOCKED);
12988 NET_EPOCH_EXIT(et);
12989 /* now relock the stcb so everything is sane */
12993 * In this case top is already chained to mm avoid double
12994 * free, since we free it below if top != NULL and driver
12995 * would free it after sending the packet out
13002 /* Calculate the maximum we can send */
13003 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13004 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13005 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13009 if (hold_tcblock) {
13010 SCTP_TCB_UNLOCK(stcb);
13013 if (asoc->strmout == NULL) {
13014 /* huh? software error */
13015 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13020 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13021 if ((user_marks_eor == 0) &&
13022 (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13023 /* It will NEVER fit */
13024 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13028 if ((uio == NULL) && user_marks_eor) {
13030 * We do not support eeor mode for
13031 * sending with mbuf chains (like sendfile).
13033 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13038 if (user_marks_eor) {
13039 local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13042 * For non-eeor the whole message must fit in
13043 * the socket send buffer.
13045 local_add_more = sndlen;
13047 if (non_blocking) {
13048 goto skip_preblock;
13050 if (((max_len <= local_add_more) &&
13051 ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13053 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13054 /* No room right now ! */
13055 SOCKBUF_LOCK(&so->so_snd);
13056 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13057 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13058 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
13060 (unsigned int)SCTP_SB_LIMIT_SND(so),
13063 stcb->asoc.stream_queue_cnt,
13064 stcb->asoc.chunks_on_out_queue,
13065 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13066 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13067 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13070 stcb->block_entry = &be;
13071 error = sbwait(&so->so_snd);
13072 stcb->block_entry = NULL;
13073 if (error || so->so_error || be.error) {
13076 error = so->so_error;
13081 SOCKBUF_UNLOCK(&so->so_snd);
13084 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13085 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13086 asoc, stcb->asoc.total_output_queue_size);
13088 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13089 SOCKBUF_UNLOCK(&so->so_snd);
13092 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13094 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13095 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13099 SOCKBUF_UNLOCK(&so->so_snd);
13103 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13107 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13108 * case NOTE: uio will be null when top/mbuf is passed
13111 if (sinfo_flags & SCTP_EOF) {
13112 got_all_of_the_send = 1;
13115 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13121 struct sctp_stream_queue_pending *sp;
13122 struct sctp_stream_out *strm;
13125 SCTP_TCB_SEND_LOCK(stcb);
13126 if ((asoc->stream_locked) &&
13127 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13128 SCTP_TCB_SEND_UNLOCK(stcb);
13129 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13133 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13134 if (strm->last_msg_incomplete == 0) {
13136 SCTP_TCB_SEND_UNLOCK(stcb);
13137 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13141 SCTP_TCB_SEND_LOCK(stcb);
13142 /* The out streams might be reallocated. */
13143 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13144 if (sp->msg_is_complete) {
13145 strm->last_msg_incomplete = 0;
13146 asoc->stream_locked = 0;
13149 * Just got locked to this guy in case of an
13152 strm->last_msg_incomplete = 1;
13153 if (stcb->asoc.idata_supported == 0) {
13154 asoc->stream_locked = 1;
13155 asoc->stream_locked_on = srcv->sinfo_stream;
13157 sp->sender_all_done = 0;
13159 sctp_snd_sb_alloc(stcb, sp->length);
13160 atomic_add_int(&asoc->stream_queue_cnt, 1);
13161 if (sinfo_flags & SCTP_UNORDERED) {
13162 SCTP_STAT_INCR(sctps_sends_with_unord);
13164 sp->processing = 1;
13165 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13166 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp);
13168 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13170 /* ???? Huh ??? last msg is gone */
13172 panic("Warning: Last msg marked incomplete, yet nothing left?");
13174 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13175 strm->last_msg_incomplete = 0;
13179 if (sp->processing) {
13180 SCTP_TCB_SEND_UNLOCK(stcb);
13181 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13185 sp->processing = 1;
13188 SCTP_TCB_SEND_UNLOCK(stcb);
13189 while (uio->uio_resid > 0) {
13190 /* How much room do we have? */
13191 struct mbuf *new_tail, *mm;
13193 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13194 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13195 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13199 if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13200 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13201 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13204 if (hold_tcblock) {
13205 SCTP_TCB_UNLOCK(stcb);
13208 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13209 if ((mm == NULL) || error) {
13213 SCTP_TCB_SEND_LOCK(stcb);
13214 if (((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) &&
13215 ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) == 0) &&
13217 sp->processing = 0;
13219 SCTP_TCB_SEND_UNLOCK(stcb);
13222 /* Update the mbuf and count */
13223 SCTP_TCB_SEND_LOCK(stcb);
13224 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13225 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13227 * we need to get out. Peer probably
13231 if (stcb->asoc.state & SCTP_STATE_WAS_ABORTED) {
13232 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13233 error = ECONNRESET;
13235 SCTP_TCB_SEND_UNLOCK(stcb);
13238 if (sp->tail_mbuf) {
13239 /* tack it to the end */
13240 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13241 sp->tail_mbuf = new_tail;
13243 /* A stolen mbuf */
13245 sp->tail_mbuf = new_tail;
13247 sctp_snd_sb_alloc(stcb, sndout);
13248 atomic_add_int(&sp->length, sndout);
13249 if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13250 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13253 /* Did we reach EOR? */
13254 if ((uio->uio_resid == 0) &&
13255 ((user_marks_eor == 0) ||
13256 (sinfo_flags & SCTP_EOF) ||
13257 (user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
13258 sp->msg_is_complete = 1;
13260 sp->msg_is_complete = 0;
13262 SCTP_TCB_SEND_UNLOCK(stcb);
13264 if (uio->uio_resid == 0) {
13269 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13271 * This is ugly but we must assure locking
13274 if (hold_tcblock == 0) {
13275 SCTP_TCB_LOCK(stcb);
13278 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13279 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13280 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13281 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13287 SCTP_TCB_UNLOCK(stcb);
13290 /* wait for space now */
13291 if (non_blocking) {
13292 /* Non-blocking io in place out */
13293 SCTP_TCB_SEND_LOCK(stcb);
13295 sp->processing = 0;
13297 SCTP_TCB_SEND_UNLOCK(stcb);
13300 /* What about the INIT, send it maybe */
13301 if (queue_only_for_init) {
13302 if (hold_tcblock == 0) {
13303 SCTP_TCB_LOCK(stcb);
13306 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13307 /* a collision took us forward? */
13310 NET_EPOCH_ENTER(et);
13311 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13312 NET_EPOCH_EXIT(et);
13313 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13317 if ((net->flight_size > net->cwnd) &&
13318 (asoc->sctp_cmt_on_off == 0)) {
13319 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13321 } else if (asoc->ifp_had_enobuf) {
13322 SCTP_STAT_INCR(sctps_ifnomemqueued);
13323 if (net->flight_size > (2 * net->mtu)) {
13326 asoc->ifp_had_enobuf = 0;
13328 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13329 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13330 (stcb->asoc.total_flight > 0) &&
13331 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13332 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13334 * Ok, Nagle is set on and we have data outstanding.
13335 * Don't send anything and let SACKs drive out the
13336 * data unless we have a "full" segment to send.
13338 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13339 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13341 SCTP_STAT_INCR(sctps_naglequeued);
13344 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13345 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13346 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13348 SCTP_STAT_INCR(sctps_naglesent);
13351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13352 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13353 nagle_applies, un_sent);
13354 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13355 stcb->asoc.total_flight,
13356 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13358 if (queue_only_for_init)
13359 queue_only_for_init = 0;
13360 if ((queue_only == 0) && (nagle_applies == 0)) {
13362 * need to start chunk output
13363 * before blocking.. note that if
13364 * a lock is already applied, then
13365 * the input via the net is happening
13366 * and I don't need to start output :-D
13368 NET_EPOCH_ENTER(et);
13369 if (hold_tcblock == 0) {
13370 if (SCTP_TCB_TRYLOCK(stcb)) {
13372 sctp_chunk_output(inp,
13374 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13377 sctp_chunk_output(inp,
13379 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13381 NET_EPOCH_EXIT(et);
13383 if (hold_tcblock == 1) {
13384 SCTP_TCB_UNLOCK(stcb);
13387 SOCKBUF_LOCK(&so->so_snd);
13389 * This is a bit strange, but I think it will
13390 * work. The total_output_queue_size is locked and
13391 * protected by the TCB_LOCK, which we just released.
13392 * There is a race that can occur between releasing it
13393 * above, and me getting the socket lock, where sacks
13394 * come in but we have not put the SB_WAIT on the
13395 * so_snd buffer to get the wakeup. After the LOCK
13396 * is applied the sack_processing will also need to
13397 * LOCK the so->so_snd to do the actual sowwakeup(). So
13398 * once we have the socket buffer lock if we recheck the
13399 * size we KNOW we will get to sleep safely with the
13400 * wakeup flag in place.
13402 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13403 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13404 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13405 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13406 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13407 asoc, uio->uio_resid);
13410 stcb->block_entry = &be;
13411 error = sbwait(&so->so_snd);
13412 stcb->block_entry = NULL;
13414 if (error || so->so_error || be.error) {
13417 error = so->so_error;
13422 SOCKBUF_UNLOCK(&so->so_snd);
13423 SCTP_TCB_SEND_LOCK(stcb);
13424 if (((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) &&
13425 ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) == 0) &&
13427 sp->processing = 0;
13429 SCTP_TCB_SEND_UNLOCK(stcb);
13433 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13434 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13435 asoc, stcb->asoc.total_output_queue_size);
13438 SOCKBUF_UNLOCK(&so->so_snd);
13439 SCTP_TCB_SEND_LOCK(stcb);
13440 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13441 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13442 SCTP_TCB_SEND_UNLOCK(stcb);
13445 SCTP_TCB_SEND_UNLOCK(stcb);
13447 SCTP_TCB_SEND_LOCK(stcb);
13448 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13449 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13450 SCTP_TCB_SEND_UNLOCK(stcb);
13454 if (sp->msg_is_complete == 0) {
13455 strm->last_msg_incomplete = 1;
13456 if (stcb->asoc.idata_supported == 0) {
13457 asoc->stream_locked = 1;
13458 asoc->stream_locked_on = srcv->sinfo_stream;
13461 sp->sender_all_done = 1;
13462 strm->last_msg_incomplete = 0;
13463 asoc->stream_locked = 0;
13465 sp->processing = 0;
13467 SCTP_PRINTF("Huh no sp TSNH?\n");
13468 strm->last_msg_incomplete = 0;
13469 asoc->stream_locked = 0;
13471 SCTP_TCB_SEND_UNLOCK(stcb);
13472 if (uio->uio_resid == 0) {
13473 got_all_of_the_send = 1;
13476 /* We send in a 0, since we do NOT have any locks */
13477 error = sctp_msg_append(stcb, net, top, srcv, 0);
13479 if (sinfo_flags & SCTP_EOF) {
13480 got_all_of_the_send = 1;
13488 if ((sinfo_flags & SCTP_EOF) &&
13489 (got_all_of_the_send == 1)) {
13490 SCTP_STAT_INCR(sctps_sends_with_eof);
13492 if (hold_tcblock == 0) {
13493 SCTP_TCB_LOCK(stcb);
13496 if (TAILQ_EMPTY(&asoc->send_queue) &&
13497 TAILQ_EMPTY(&asoc->sent_queue) &&
13498 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13499 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13502 /* there is nothing queued to send, so I'm done... */
13503 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13504 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13505 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13506 struct sctp_nets *netp;
13508 /* only send SHUTDOWN the first time through */
13509 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13510 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13512 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13513 sctp_stop_timers_for_shutdown(stcb);
13514 if (stcb->asoc.alternate) {
13515 netp = stcb->asoc.alternate;
13517 netp = stcb->asoc.primary_destination;
13519 sctp_send_shutdown(stcb, netp);
13520 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13522 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13527 * we still got (or just got) data to send, so set
13531 * XXX sockets draft says that SCTP_EOF should be
13532 * sent with no data. currently, we will allow user
13533 * data to be sent first and move to
13536 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13537 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13538 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13539 if (hold_tcblock == 0) {
13540 SCTP_TCB_LOCK(stcb);
13543 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13544 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13546 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13547 if (TAILQ_EMPTY(&asoc->send_queue) &&
13548 TAILQ_EMPTY(&asoc->sent_queue) &&
13549 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13550 struct mbuf *op_err;
13551 char msg[SCTP_DIAG_INFO_LEN];
13554 if (free_cnt_applied) {
13555 atomic_subtract_int(&stcb->asoc.refcnt, 1);
13556 free_cnt_applied = 0;
13558 SCTP_SNPRINTF(msg, sizeof(msg),
13559 "%s:%d at %s", __FILE__, __LINE__, __func__);
13560 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13562 NET_EPOCH_ENTER(et);
13563 sctp_abort_an_association(stcb->sctp_ep, stcb,
13564 op_err, false, SCTP_SO_LOCKED);
13565 NET_EPOCH_EXIT(et);
13567 * now relock the stcb so everything
13574 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13576 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13581 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13582 some_on_control = 1;
13584 if (queue_only_for_init) {
13585 if (hold_tcblock == 0) {
13586 SCTP_TCB_LOCK(stcb);
13589 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13590 /* a collision took us forward? */
13593 NET_EPOCH_ENTER(et);
13594 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13595 NET_EPOCH_EXIT(et);
13596 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13600 if ((net->flight_size > net->cwnd) &&
13601 (stcb->asoc.sctp_cmt_on_off == 0)) {
13602 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13604 } else if (asoc->ifp_had_enobuf) {
13605 SCTP_STAT_INCR(sctps_ifnomemqueued);
13606 if (net->flight_size > (2 * net->mtu)) {
13609 asoc->ifp_had_enobuf = 0;
13611 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13612 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13613 (stcb->asoc.total_flight > 0) &&
13614 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13615 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13617 * Ok, Nagle is set on and we have data outstanding.
13618 * Don't send anything and let SACKs drive out the
13619 * data unless wen have a "full" segment to send.
13621 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13622 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13624 SCTP_STAT_INCR(sctps_naglequeued);
13627 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13628 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13629 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13631 SCTP_STAT_INCR(sctps_naglesent);
13634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13635 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13636 nagle_applies, un_sent);
13637 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13638 stcb->asoc.total_flight,
13639 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13641 NET_EPOCH_ENTER(et);
13642 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13643 /* we can attempt to send too. */
13644 if (hold_tcblock == 0) {
13646 * If there is activity recv'ing sacks no need to
13649 if (SCTP_TCB_TRYLOCK(stcb)) {
13650 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13654 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13656 } else if ((queue_only == 0) &&
13657 (stcb->asoc.peers_rwnd == 0) &&
13658 (stcb->asoc.total_flight == 0)) {
13659 /* We get to have a probe outstanding */
13660 if (hold_tcblock == 0) {
13662 SCTP_TCB_LOCK(stcb);
13664 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13665 } else if (some_on_control) {
13666 int num_out, reason, frag_point;
13668 /* Here we do control only */
13669 if (hold_tcblock == 0) {
13671 SCTP_TCB_LOCK(stcb);
13673 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13674 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13675 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13677 NET_EPOCH_EXIT(et);
13678 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13679 queue_only, stcb->asoc.peers_rwnd, un_sent,
13680 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13681 stcb->asoc.total_output_queue_size, error);
13686 if (local_soresv && stcb) {
13687 atomic_subtract_int(&stcb->asoc.sb_send_resv, (int)sndlen);
13689 if (create_lock_applied) {
13690 SCTP_ASOC_CREATE_UNLOCK(inp);
13692 if ((stcb) && hold_tcblock) {
13693 SCTP_TCB_UNLOCK(stcb);
13695 if (stcb && free_cnt_applied) {
13696 atomic_subtract_int(&stcb->asoc.refcnt, 1);
13700 if (mtx_owned(&stcb->tcb_mtx)) {
13701 panic("Leaving with tcb mtx owned?");
13703 if (mtx_owned(&stcb->tcb_send_mtx)) {
13704 panic("Leaving with tcb send mtx owned?");
13712 sctp_m_freem(control);
13718 * generate an AUTHentication chunk, if required
13721 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13722 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13723 struct sctp_tcb *stcb, uint8_t chunk)
13725 struct mbuf *m_auth;
13726 struct sctp_auth_chunk *auth;
13730 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13734 if (stcb->asoc.auth_supported == 0) {
13737 /* does the requested chunk require auth? */
13738 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13741 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13742 if (m_auth == NULL) {
13746 /* reserve some space if this will be the first mbuf */
13748 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13749 /* fill in the AUTH chunk details */
13750 auth = mtod(m_auth, struct sctp_auth_chunk *);
13751 memset(auth, 0, sizeof(*auth));
13752 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13753 auth->ch.chunk_flags = 0;
13754 chunk_len = sizeof(*auth) +
13755 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13756 auth->ch.chunk_length = htons(chunk_len);
13757 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13758 /* key id and hmac digest will be computed and filled in upon send */
13760 /* save the offset where the auth was inserted into the chain */
13762 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13763 *offset += SCTP_BUF_LEN(cn);
13766 /* update length and return pointer to the auth chunk */
13767 SCTP_BUF_LEN(m_auth) = chunk_len;
13768 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13769 if (auth_ret != NULL)
13777 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13779 struct nd_prefix *pfx = NULL;
13780 struct nd_pfxrouter *pfxrtr = NULL;
13781 struct sockaddr_in6 gw6;
13783 if (ro == NULL || ro->ro_nh == NULL || src6->sin6_family != AF_INET6)
13786 /* get prefix entry of address */
13788 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13789 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13791 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13792 &src6->sin6_addr, &pfx->ndpr_mask))
13795 /* no prefix entry in the prefix list */
13798 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13799 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13803 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13804 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13806 /* search installed gateway from prefix entry */
13807 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13808 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13809 gw6.sin6_family = AF_INET6;
13810 gw6.sin6_len = sizeof(struct sockaddr_in6);
13811 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13812 sizeof(struct in6_addr));
13813 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13814 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13815 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13816 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13817 if (sctp_cmpaddr((struct sockaddr *)&gw6, &ro->ro_nh->gw_sa)) {
13819 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13824 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13830 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13833 struct sockaddr_in *sin, *mask;
13834 struct ifaddr *ifa;
13835 struct in_addr srcnetaddr, gwnetaddr;
13837 if (ro == NULL || ro->ro_nh == NULL ||
13838 sifa->address.sa.sa_family != AF_INET) {
13841 ifa = (struct ifaddr *)sifa->ifa;
13842 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13843 sin = &sifa->address.sin;
13844 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13845 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13846 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13847 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13849 sin = &ro->ro_nh->gw4_sa;
13850 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13851 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13852 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13853 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13854 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {