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,
2780 struct sctp_ifa *ifa, *sifa;
2781 int num_eligible_addr = 0;
2783 struct sockaddr_in6 sin6, lsa6;
2785 if (fam == AF_INET6) {
2786 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2787 (void)sa6_recoverscope(&sin6);
2790 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2792 if ((ifa->address.sa.sa_family == AF_INET) &&
2793 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2794 &ifa->address.sin.sin_addr) != 0)) {
2799 if ((ifa->address.sa.sa_family == AF_INET6) &&
2800 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2801 &ifa->address.sin6.sin6_addr) != 0)) {
2805 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2806 (non_asoc_addr_ok == 0))
2808 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2813 if (fam == AF_INET6 &&
2815 sifa->src_is_loop && sifa->src_is_priv) {
2817 * don't allow fe80::1 to be a src on loop ::1, we
2818 * don't list it to the peer so we will get an
2823 if (fam == AF_INET6 &&
2824 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2825 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2827 * link-local <-> link-local must belong to the same
2830 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2831 (void)sa6_recoverscope(&lsa6);
2832 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2839 * Check if the IPv6 address matches to next-hop. In the
2840 * mobile case, old IPv6 address may be not deleted from the
2841 * interface. Then, the interface has previous and new
2842 * addresses. We should use one corresponding to the
2843 * next-hop. (by micchie)
2846 if (stcb && fam == AF_INET6 &&
2847 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2848 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2855 /* Avoid topologically incorrect IPv4 address */
2856 if (stcb && fam == AF_INET &&
2857 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2858 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2864 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2867 if (((non_asoc_addr_ok == 0) &&
2868 (sctp_is_addr_restricted(stcb, sifa))) ||
2869 (non_asoc_addr_ok &&
2870 (sctp_is_addr_restricted(stcb, sifa)) &&
2871 (!sctp_is_addr_pending(stcb, sifa)))) {
2873 * It is restricted for some reason..
2874 * probably not yet added.
2879 if (num_eligible_addr >= addr_wanted) {
2882 num_eligible_addr++;
2888 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2889 struct sctp_inpcb *inp,
2890 struct sctp_tcb *stcb,
2891 int non_asoc_addr_ok,
2892 uint8_t dest_is_loop,
2893 uint8_t dest_is_priv,
2896 struct sctp_ifa *ifa, *sifa;
2897 int num_eligible_addr = 0;
2899 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2901 if ((ifa->address.sa.sa_family == AF_INET) &&
2902 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2903 &ifa->address.sin.sin_addr) != 0)) {
2908 if ((ifa->address.sa.sa_family == AF_INET6) &&
2910 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2911 &ifa->address.sin6.sin6_addr) != 0)) {
2915 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2916 (non_asoc_addr_ok == 0)) {
2919 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2925 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2928 if (((non_asoc_addr_ok == 0) &&
2929 (sctp_is_addr_restricted(stcb, sifa))) ||
2930 (non_asoc_addr_ok &&
2931 (sctp_is_addr_restricted(stcb, sifa)) &&
2932 (!sctp_is_addr_pending(stcb, sifa)))) {
2934 * It is restricted for some reason..
2935 * probably not yet added.
2940 num_eligible_addr++;
2942 return (num_eligible_addr);
2945 static struct sctp_ifa *
2946 sctp_choose_boundall(struct sctp_inpcb *inp,
2947 struct sctp_tcb *stcb,
2948 struct sctp_nets *net,
2951 uint8_t dest_is_priv,
2952 uint8_t dest_is_loop,
2953 int non_asoc_addr_ok,
2956 int cur_addr_num = 0, num_preferred = 0;
2958 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2959 struct sctp_ifa *sctp_ifa, *sifa;
2961 struct sctp_vrf *vrf;
2967 * For boundall we can use any address in the association.
2968 * If non_asoc_addr_ok is set we can use any address (at least in
2969 * theory). So we look for preferred addresses first. If we find one,
2970 * we use it. Otherwise we next try to get an address on the
2971 * interface, which we should be able to do (unless non_asoc_addr_ok
2972 * is false and we are routed out that way). In these cases where we
2973 * can't use the address of the interface we go through all the
2974 * ifn's looking for an address we can use and fill that in. Punting
2975 * means we send back address 0, which will probably cause problems
2976 * actually since then IP will fill in the address of the route ifn,
2977 * which means we probably already rejected it.. i.e. here comes an
2980 vrf = sctp_find_vrf(vrf_id);
2984 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2985 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2986 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2987 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2988 if (sctp_ifn == NULL) {
2989 /* ?? We don't have this guy ?? */
2990 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2991 goto bound_all_plan_b;
2993 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2994 ifn_index, sctp_ifn->ifn_name);
2997 cur_addr_num = net->indx_of_eligible_next_to_use;
2999 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3004 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3005 num_preferred, sctp_ifn->ifn_name);
3006 if (num_preferred == 0) {
3008 * no eligible addresses, we must use some other interface
3009 * address if we can find one.
3011 goto bound_all_plan_b;
3014 * Ok we have num_eligible_addr set with how many we can use, this
3015 * may vary from call to call due to addresses being deprecated
3018 if (cur_addr_num >= num_preferred) {
3022 * select the nth address from the list (where cur_addr_num is the
3023 * nth) and 0 is the first one, 1 is the second one etc...
3025 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3027 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3028 dest_is_priv, cur_addr_num, fam, ro);
3030 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3032 atomic_add_int(&sctp_ifa->refcount, 1);
3034 /* save off where the next one we will want */
3035 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3040 * plan_b: Look at all interfaces and find a preferred address. If
3041 * no preferred fall through to plan_c.
3044 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3045 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3046 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3047 sctp_ifn->ifn_name);
3048 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3049 /* wrong base scope */
3050 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3053 if ((sctp_ifn == looked_at) && looked_at) {
3054 /* already looked at this guy */
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3058 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3059 dest_is_loop, dest_is_priv, fam);
3060 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3061 "Found ifn:%p %d preferred source addresses\n",
3062 ifn, num_preferred);
3063 if (num_preferred == 0) {
3064 /* None on this interface. */
3065 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3068 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3069 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3070 num_preferred, (void *)sctp_ifn, cur_addr_num);
3073 * Ok we have num_eligible_addr set with how many we can
3074 * use, this may vary from call to call due to addresses
3075 * being deprecated etc..
3077 if (cur_addr_num >= num_preferred) {
3080 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3081 dest_is_priv, cur_addr_num, fam, ro);
3085 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3086 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3088 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3089 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3090 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3091 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3093 atomic_add_int(&sifa->refcount, 1);
3097 again_with_private_addresses_allowed:
3099 /* plan_c: do we have an acceptable address on the emit interface */
3101 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3102 if (emit_ifn == NULL) {
3103 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3106 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3107 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3109 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3110 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3111 &sctp_ifa->address.sin.sin_addr) != 0)) {
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3117 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3118 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3119 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3120 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3124 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3125 (non_asoc_addr_ok == 0)) {
3126 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3129 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3132 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3136 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3137 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3141 if (((non_asoc_addr_ok == 0) &&
3142 (sctp_is_addr_restricted(stcb, sifa))) ||
3143 (non_asoc_addr_ok &&
3144 (sctp_is_addr_restricted(stcb, sifa)) &&
3145 (!sctp_is_addr_pending(stcb, sifa)))) {
3147 * It is restricted for some reason..
3148 * probably not yet added.
3150 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3155 atomic_add_int(&sifa->refcount, 1);
3160 * plan_d: We are in trouble. No preferred address on the emit
3161 * interface. And not even a preferred address on all interfaces. Go
3162 * out and see if we can find an acceptable address somewhere
3163 * amongst all interfaces.
3165 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3166 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3167 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3168 /* wrong base scope */
3171 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3173 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3174 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3175 &sctp_ifa->address.sin.sin_addr) != 0)) {
3180 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3181 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3182 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3186 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3187 (non_asoc_addr_ok == 0))
3189 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3195 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3199 if (((non_asoc_addr_ok == 0) &&
3200 (sctp_is_addr_restricted(stcb, sifa))) ||
3201 (non_asoc_addr_ok &&
3202 (sctp_is_addr_restricted(stcb, sifa)) &&
3203 (!sctp_is_addr_pending(stcb, sifa)))) {
3205 * It is restricted for some
3206 * reason.. probably not yet added.
3217 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3218 stcb->asoc.scope.ipv4_local_scope = 1;
3220 goto again_with_private_addresses_allowed;
3221 } else if (retried == 1) {
3222 stcb->asoc.scope.ipv4_local_scope = 0;
3230 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3231 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3232 /* wrong base scope */
3235 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3236 struct sctp_ifa *tmp_sifa;
3239 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3240 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3241 &sctp_ifa->address.sin.sin_addr) != 0)) {
3246 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3247 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3248 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3252 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3253 (non_asoc_addr_ok == 0))
3255 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3258 if (tmp_sifa == NULL) {
3261 if (tmp_sifa == sifa) {
3265 if (sctp_is_address_in_scope(tmp_sifa,
3266 &stcb->asoc.scope, 0) == 0) {
3269 if (((non_asoc_addr_ok == 0) &&
3270 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3271 (non_asoc_addr_ok &&
3272 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3273 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3283 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3284 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3285 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3290 atomic_add_int(&sifa->refcount, 1);
3296 /* tcb may be NULL */
3298 sctp_source_address_selection(struct sctp_inpcb *inp,
3299 struct sctp_tcb *stcb,
3301 struct sctp_nets *net,
3302 int non_asoc_addr_ok, uint32_t vrf_id)
3304 struct sctp_ifa *answer;
3305 uint8_t dest_is_priv, dest_is_loop;
3308 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3311 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3316 * - Find the route if needed, cache if I can.
3317 * - Look at interface address in route, Is it in the bound list. If so we
3318 * have the best source.
3319 * - If not we must rotate amongst the addresses.
3323 * Do we need to pay attention to scope. We can have a private address
3324 * or a global address we are sourcing or sending to. So if we draw
3326 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3328 * ------------------------------------------
3329 * source * dest * result
3330 * -----------------------------------------
3331 * <a> Private * Global * NAT
3332 * -----------------------------------------
3333 * <b> Private * Private * No problem
3334 * -----------------------------------------
3335 * <c> Global * Private * Huh, How will this work?
3336 * -----------------------------------------
3337 * <d> Global * Global * No Problem
3338 *------------------------------------------
3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3341 *------------------------------------------
3342 * source * dest * result
3343 * -----------------------------------------
3344 * <a> Linklocal * Global *
3345 * -----------------------------------------
3346 * <b> Linklocal * Linklocal * No problem
3347 * -----------------------------------------
3348 * <c> Global * Linklocal * Huh, How will this work?
3349 * -----------------------------------------
3350 * <d> Global * Global * No Problem
3351 *------------------------------------------
3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3354 * And then we add to that what happens if there are multiple addresses
3355 * assigned to an interface. Remember the ifa on a ifn is a linked
3356 * list of addresses. So one interface can have more than one IP
3357 * address. What happens if we have both a private and a global
3358 * address? Do we then use context of destination to sort out which
3359 * one is best? And what about NAT's sending P->G may get you a NAT
3360 * translation, or should you select the G thats on the interface in
3365 * - count the number of addresses on the interface.
3366 * - if it is one, no problem except case <c>.
3367 * For <a> we will assume a NAT out there.
3368 * - if there are more than one, then we need to worry about scope P
3369 * or G. We should prefer G -> G and P -> P if possible.
3370 * Then as a secondary fall back to mixed types G->P being a last
3372 * - The above all works for bound all, but bound specific we need to
3373 * use the same concept but instead only consider the bound
3374 * addresses. If the bound set is NOT assigned to the interface then
3375 * we must use rotation amongst the bound addresses..
3377 if (ro->ro_nh == NULL) {
3379 * Need a route to cache.
3381 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3383 if (ro->ro_nh == NULL) {
3386 fam = ro->ro_dst.sa_family;
3387 dest_is_priv = dest_is_loop = 0;
3388 /* Setup our scopes for the destination */
3392 /* Scope based on outbound address */
3393 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3396 /* mark it as local */
3397 net->addr_is_local = 1;
3399 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3406 /* Scope based on outbound address */
3407 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3408 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3410 * If the address is a loopback address, which
3411 * consists of "::1" OR "fe80::1%lo0", we are
3412 * loopback scope. But we don't use dest_is_priv
3413 * (link local addresses).
3417 /* mark it as local */
3418 net->addr_is_local = 1;
3420 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3426 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3427 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3428 SCTP_IPI_ADDR_RLOCK();
3429 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3433 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3434 dest_is_priv, dest_is_loop,
3435 non_asoc_addr_ok, fam);
3436 SCTP_IPI_ADDR_RUNLOCK();
3443 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3444 vrf_id, dest_is_priv,
3446 non_asoc_addr_ok, fam);
3448 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3453 SCTP_IPI_ADDR_RUNLOCK();
3458 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3461 struct sctp_sndinfo sndinfo;
3462 struct sctp_prinfo prinfo;
3463 struct sctp_authinfo authinfo;
3464 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3468 * Independent of how many mbufs, find the c_type inside the control
3469 * structure and copy out the data.
3472 tot_len = SCTP_BUF_LEN(control);
3473 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3474 rem_len = tot_len - off;
3475 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3476 /* There is not enough room for one more. */
3479 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3480 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3481 /* We dont't have a complete CMSG header. */
3484 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3485 /* We don't have the complete CMSG. */
3488 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3489 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3490 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3491 ((c_type == cmh.cmsg_type) ||
3492 ((c_type == SCTP_SNDRCV) &&
3493 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3494 (cmh.cmsg_type == SCTP_PRINFO) ||
3495 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3496 if (c_type == cmh.cmsg_type) {
3497 if (cpsize > INT_MAX) {
3500 if (cmsg_data_len < (int)cpsize) {
3503 /* It is exactly what we want. Copy it out. */
3504 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3507 struct sctp_sndrcvinfo *sndrcvinfo;
3509 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3511 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3514 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3516 switch (cmh.cmsg_type) {
3518 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3521 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3522 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3523 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3524 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3525 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3526 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3529 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3532 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3533 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3534 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3536 sndrcvinfo->sinfo_timetolive = 0;
3538 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3541 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3544 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3545 sndrcvinfo->sinfo_keynumber_valid = 1;
3546 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3559 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3562 struct sctp_initmsg initmsg;
3564 struct sockaddr_in sin;
3567 struct sockaddr_in6 sin6;
3569 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3571 tot_len = SCTP_BUF_LEN(control);
3572 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3573 rem_len = tot_len - off;
3574 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3575 /* There is not enough room for one more. */
3579 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3580 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3581 /* We dont't have a complete CMSG header. */
3585 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3586 /* We don't have the complete CMSG. */
3590 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3591 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3592 if (cmh.cmsg_level == IPPROTO_SCTP) {
3593 switch (cmh.cmsg_type) {
3595 if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
3599 m_copydata(control, cmsg_data_off, sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3600 if (initmsg.sinit_max_attempts)
3601 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3602 if (initmsg.sinit_num_ostreams)
3603 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3604 if (initmsg.sinit_max_instreams)
3605 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3606 if (initmsg.sinit_max_init_timeo)
3607 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3608 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3609 struct sctp_stream_out *tmp_str;
3611 #if defined(SCTP_DETAILED_STR_STATS)
3615 /* Default is NOT correct */
3616 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3617 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3618 SCTP_TCB_UNLOCK(stcb);
3619 SCTP_MALLOC(tmp_str,
3620 struct sctp_stream_out *,
3621 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3623 SCTP_TCB_LOCK(stcb);
3624 if (tmp_str != NULL) {
3625 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3626 stcb->asoc.strmout = tmp_str;
3627 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3629 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3631 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3632 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3633 stcb->asoc.strmout[i].chunks_on_queues = 0;
3634 stcb->asoc.strmout[i].next_mid_ordered = 0;
3635 stcb->asoc.strmout[i].next_mid_unordered = 0;
3636 #if defined(SCTP_DETAILED_STR_STATS)
3637 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3638 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3639 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3642 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3643 stcb->asoc.strmout[i].abandoned_unsent[0] = 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;
3648 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3653 case SCTP_DSTADDRV4:
3654 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3658 memset(&sin, 0, sizeof(struct sockaddr_in));
3659 sin.sin_family = AF_INET;
3660 sin.sin_len = sizeof(struct sockaddr_in);
3661 sin.sin_port = stcb->rport;
3662 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3663 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3664 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3665 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3669 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3670 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3677 case SCTP_DSTADDRV6:
3678 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3682 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3683 sin6.sin6_family = AF_INET6;
3684 sin6.sin6_len = sizeof(struct sockaddr_in6);
3685 sin6.sin6_port = stcb->rport;
3686 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3687 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3688 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3693 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3694 in6_sin6_2_sin(&sin, &sin6);
3695 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3696 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3697 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3701 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3702 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3708 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3709 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3723 #if defined(INET) || defined(INET6)
3724 static struct sctp_tcb *
3725 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3727 struct mbuf *control,
3728 struct sctp_nets **net_p,
3732 struct sctp_tcb *stcb;
3733 struct sockaddr *addr;
3735 struct sockaddr_in sin;
3738 struct sockaddr_in6 sin6;
3740 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3742 tot_len = SCTP_BUF_LEN(control);
3743 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3744 rem_len = tot_len - off;
3745 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3746 /* There is not enough room for one more. */
3750 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3751 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3752 /* We dont't have a complete CMSG header. */
3756 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3757 /* We don't have the complete CMSG. */
3761 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3762 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3763 if (cmh.cmsg_level == IPPROTO_SCTP) {
3764 switch (cmh.cmsg_type) {
3766 case SCTP_DSTADDRV4:
3767 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3771 memset(&sin, 0, sizeof(struct sockaddr_in));
3772 sin.sin_family = AF_INET;
3773 sin.sin_len = sizeof(struct sockaddr_in);
3774 sin.sin_port = port;
3775 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3776 addr = (struct sockaddr *)&sin;
3780 case SCTP_DSTADDRV6:
3781 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3785 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3786 sin6.sin6_family = AF_INET6;
3787 sin6.sin6_len = sizeof(struct sockaddr_in6);
3788 sin6.sin6_port = port;
3789 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3791 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3792 in6_sin6_2_sin(&sin, &sin6);
3793 addr = (struct sockaddr *)&sin;
3796 addr = (struct sockaddr *)&sin6;
3804 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3815 static struct mbuf *
3816 sctp_add_cookie(struct mbuf *init, int init_offset,
3817 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3819 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3820 struct sctp_state_cookie *stc;
3821 struct sctp_paramhdr *ph;
3824 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3825 sizeof(struct sctp_paramhdr)), 0,
3826 M_NOWAIT, 1, MT_DATA);
3830 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3831 if (copy_init == NULL) {
3835 #ifdef SCTP_MBUF_LOGGING
3836 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3837 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3840 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3842 if (copy_initack == NULL) {
3844 sctp_m_freem(copy_init);
3847 #ifdef SCTP_MBUF_LOGGING
3848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3849 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3852 /* easy side we just drop it on the end */
3853 ph = mtod(mret, struct sctp_paramhdr *);
3854 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3855 sizeof(struct sctp_paramhdr);
3856 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3857 sizeof(struct sctp_paramhdr));
3858 ph->param_type = htons(SCTP_STATE_COOKIE);
3859 ph->param_length = 0; /* fill in at the end */
3860 /* Fill in the stc cookie data */
3861 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3863 /* tack the INIT and then the INIT-ACK onto the chain */
3865 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3866 cookie_sz += SCTP_BUF_LEN(m_at);
3867 if (SCTP_BUF_NEXT(m_at) == NULL) {
3868 SCTP_BUF_NEXT(m_at) = copy_init;
3872 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3873 cookie_sz += SCTP_BUF_LEN(m_at);
3874 if (SCTP_BUF_NEXT(m_at) == NULL) {
3875 SCTP_BUF_NEXT(m_at) = copy_initack;
3879 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3880 cookie_sz += SCTP_BUF_LEN(m_at);
3881 if (SCTP_BUF_NEXT(m_at) == NULL) {
3885 sig = sctp_get_mbuf_for_msg(SCTP_SIGNATURE_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3887 /* no space, so free the entire chain */
3891 SCTP_BUF_NEXT(m_at) = sig;
3892 SCTP_BUF_LEN(sig) = SCTP_SIGNATURE_SIZE;
3893 cookie_sz += SCTP_SIGNATURE_SIZE;
3894 ph->param_length = htons(cookie_sz);
3895 *signature = (uint8_t *)mtod(sig, caddr_t);
3896 memset(*signature, 0, SCTP_SIGNATURE_SIZE);
3901 sctp_get_ect(struct sctp_tcb *stcb)
3903 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3904 return (SCTP_ECT0_BIT);
3910 #if defined(INET) || defined(INET6)
3912 sctp_handle_no_route(struct sctp_tcb *stcb,
3913 struct sctp_nets *net,
3916 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3919 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3920 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3921 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3922 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3923 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3924 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3928 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3929 net->dest_state &= ~SCTP_ADDR_PF;
3933 if (net == stcb->asoc.primary_destination) {
3934 /* need a new primary */
3935 struct sctp_nets *alt;
3937 alt = sctp_find_alternate_net(stcb, net, 0);
3939 if (stcb->asoc.alternate) {
3940 sctp_free_remote_addr(stcb->asoc.alternate);
3942 stcb->asoc.alternate = alt;
3943 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3944 if (net->ro._s_addr) {
3945 sctp_free_ifa(net->ro._s_addr);
3946 net->ro._s_addr = NULL;
3948 net->src_addr_selected = 0;
3957 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3958 struct sctp_tcb *stcb, /* may be NULL */
3959 struct sctp_nets *net,
3960 struct sockaddr *to,
3962 uint32_t auth_offset,
3963 struct sctp_auth_chunk *auth,
3964 uint16_t auth_keyid,
3965 int nofragment_flag,
3972 union sctp_sockstore *over_addr,
3973 uint8_t mflowtype, uint32_t mflowid,
3976 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3978 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3979 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3980 * - fill in the HMAC digest of any AUTH chunk in the packet.
3981 * - calculate and fill in the SCTP checksum.
3982 * - prepend an IP address header.
3983 * - if boundall use INADDR_ANY.
3984 * - if boundspecific do source address selection.
3985 * - set fragmentation option for ipV4.
3986 * - On return from IP output, check/adjust mtu size of output
3987 * interface and smallest_mtu size as well.
3989 /* Will need ifdefs around this */
3991 struct sctphdr *sctphdr;
3994 #if defined(INET) || defined(INET6)
3997 #if defined(INET) || defined(INET6)
3999 sctp_route_t *ro = NULL;
4000 struct udphdr *udp = NULL;
4004 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4005 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4009 #if defined(INET) || defined(INET6)
4011 vrf_id = stcb->asoc.vrf_id;
4013 vrf_id = inp->def_vrf_id;
4016 /* fill in the HMAC digest for any AUTH chunk in the packet */
4017 if ((auth != NULL) && (stcb != NULL)) {
4018 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4022 tos_value = net->dscp;
4024 tos_value = stcb->asoc.default_dscp;
4026 tos_value = inp->sctp_ep.default_dscp;
4029 switch (to->sa_family) {
4033 struct ip *ip = NULL;
4034 sctp_route_t iproute;
4037 len = SCTP_MIN_V4_OVERHEAD;
4039 len += sizeof(struct udphdr);
4041 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4044 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4047 SCTP_ALIGN_TO_END(newm, len);
4048 SCTP_BUF_LEN(newm) = len;
4049 SCTP_BUF_NEXT(newm) = m;
4052 m->m_pkthdr.flowid = net->flowid;
4053 M_HASHTYPE_SET(m, net->flowtype);
4055 m->m_pkthdr.flowid = mflowid;
4056 M_HASHTYPE_SET(m, mflowtype);
4058 packet_length = sctp_calculate_len(m);
4059 ip = mtod(m, struct ip *);
4060 ip->ip_v = IPVERSION;
4061 ip->ip_hl = (sizeof(struct ip) >> 2);
4062 if (tos_value == 0) {
4064 * This means especially, that it is not set
4065 * at the SCTP layer. So use the value from
4068 tos_value = inp->ip_inp.inp.inp_ip_tos;
4072 tos_value |= sctp_get_ect(stcb);
4074 if ((nofragment_flag) && (port == 0)) {
4075 ip->ip_off = htons(IP_DF);
4077 ip->ip_off = htons(0);
4079 /* FreeBSD has a function for ip_id's */
4082 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4083 ip->ip_len = htons(packet_length);
4084 ip->ip_tos = tos_value;
4086 ip->ip_p = IPPROTO_UDP;
4088 ip->ip_p = IPPROTO_SCTP;
4093 memset(&iproute, 0, sizeof(iproute));
4094 memcpy(&ro->ro_dst, to, to->sa_len);
4096 ro = (sctp_route_t *)&net->ro;
4098 /* Now the address selection part */
4099 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4101 /* call the routine to select the src address */
4102 if (net && out_of_asoc_ok == 0) {
4103 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4104 sctp_free_ifa(net->ro._s_addr);
4105 net->ro._s_addr = NULL;
4106 net->src_addr_selected = 0;
4109 if (net->src_addr_selected == 0) {
4110 /* Cache the source address */
4111 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4114 net->src_addr_selected = 1;
4116 if (net->ro._s_addr == NULL) {
4117 /* No route to host */
4118 net->src_addr_selected = 0;
4119 sctp_handle_no_route(stcb, net, so_locked);
4120 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4122 return (EHOSTUNREACH);
4124 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4126 if (over_addr == NULL) {
4127 struct sctp_ifa *_lsrc;
4129 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4133 if (_lsrc == NULL) {
4134 sctp_handle_no_route(stcb, net, so_locked);
4135 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4137 return (EHOSTUNREACH);
4139 ip->ip_src = _lsrc->address.sin.sin_addr;
4140 sctp_free_ifa(_lsrc);
4142 ip->ip_src = over_addr->sin.sin_addr;
4143 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4147 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4148 sctp_handle_no_route(stcb, net, so_locked);
4149 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4151 return (EHOSTUNREACH);
4153 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4154 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4155 udp->uh_dport = port;
4156 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4158 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4162 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4164 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4167 sctphdr->src_port = src_port;
4168 sctphdr->dest_port = dest_port;
4169 sctphdr->v_tag = v_tag;
4170 sctphdr->checksum = 0;
4173 * If source address selection fails and we find no
4174 * route then the ip_output should fail as well with
4175 * a NO_ROUTE_TO_HOST type error. We probably should
4176 * catch that somewhere and abort the association
4177 * right away (assuming this is an INIT being sent).
4179 if (ro->ro_nh == NULL) {
4181 * src addr selection failed to find a route
4182 * (or valid source addr), so we can't get
4183 * there from here (yet)!
4185 sctp_handle_no_route(stcb, net, so_locked);
4186 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4188 return (EHOSTUNREACH);
4190 if (ro != &iproute) {
4191 memcpy(&iproute, ro, sizeof(*ro));
4193 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4194 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4195 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4196 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4197 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4200 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4201 /* failed to prepend data, give up */
4202 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4206 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4208 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4209 SCTP_STAT_INCR(sctps_sendswcrc);
4211 SCTP_ENABLE_UDP_CSUM(o_pak);
4214 m->m_pkthdr.csum_flags = CSUM_SCTP;
4215 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4216 SCTP_STAT_INCR(sctps_sendhwcrc);
4218 #ifdef SCTP_PACKET_LOGGING
4219 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4220 sctp_packet_log(o_pak);
4222 /* send it out. table id is taken from stcb */
4223 SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
4224 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4226 UDPSTAT_INC(udps_opackets);
4228 SCTP_STAT_INCR(sctps_sendpackets);
4229 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4231 SCTP_STAT_INCR(sctps_senderrors);
4233 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4235 /* free tempy routes */
4238 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4239 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4242 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4245 mtu -= sizeof(struct udphdr);
4247 if (mtu < net->mtu) {
4248 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4249 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4254 } else if (ro->ro_nh == NULL) {
4255 /* route was freed */
4256 if (net->ro._s_addr &&
4257 net->src_addr_selected) {
4258 sctp_free_ifa(net->ro._s_addr);
4259 net->ro._s_addr = NULL;
4261 net->src_addr_selected = 0;
4270 uint32_t flowlabel, flowinfo;
4271 struct ip6_hdr *ip6h;
4272 struct route_in6 ip6route;
4274 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4276 struct sockaddr_in6 lsa6_storage;
4278 u_short prev_port = 0;
4282 flowlabel = net->flowlabel;
4284 flowlabel = stcb->asoc.default_flowlabel;
4286 flowlabel = inp->sctp_ep.default_flowlabel;
4288 if (flowlabel == 0) {
4290 * This means especially, that it is not set
4291 * at the SCTP layer. So use the value from
4294 flowlabel = ntohl(((struct inpcb *)inp)->inp_flow);
4296 flowlabel &= 0x000fffff;
4297 len = SCTP_MIN_OVERHEAD;
4299 len += sizeof(struct udphdr);
4301 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4304 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4307 SCTP_ALIGN_TO_END(newm, len);
4308 SCTP_BUF_LEN(newm) = len;
4309 SCTP_BUF_NEXT(newm) = m;
4312 m->m_pkthdr.flowid = net->flowid;
4313 M_HASHTYPE_SET(m, net->flowtype);
4315 m->m_pkthdr.flowid = mflowid;
4316 M_HASHTYPE_SET(m, mflowtype);
4318 packet_length = sctp_calculate_len(m);
4320 ip6h = mtod(m, struct ip6_hdr *);
4321 /* protect *sin6 from overwrite */
4322 sin6 = (struct sockaddr_in6 *)to;
4326 /* KAME hack: embed scopeid */
4327 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4328 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4333 memset(&ip6route, 0, sizeof(ip6route));
4334 ro = (sctp_route_t *)&ip6route;
4335 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4337 ro = (sctp_route_t *)&net->ro;
4340 * We assume here that inp_flow is in host byte
4341 * order within the TCB!
4343 if (tos_value == 0) {
4345 * This means especially, that it is not set
4346 * at the SCTP layer. So use the value from
4349 tos_value = (ntohl(((struct inpcb *)inp)->inp_flow) >> 20) & 0xff;
4353 tos_value |= sctp_get_ect(stcb);
4357 flowinfo |= tos_value;
4359 flowinfo |= flowlabel;
4360 ip6h->ip6_flow = htonl(flowinfo);
4362 ip6h->ip6_nxt = IPPROTO_UDP;
4364 ip6h->ip6_nxt = IPPROTO_SCTP;
4366 ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4367 ip6h->ip6_dst = sin6->sin6_addr;
4370 * Add SRC address selection here: we can only reuse
4371 * to a limited degree the kame src-addr-sel, since
4372 * we can try their selection but it may not be
4375 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4376 lsa6_tmp.sin6_family = AF_INET6;
4377 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4379 if (net && out_of_asoc_ok == 0) {
4380 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4381 sctp_free_ifa(net->ro._s_addr);
4382 net->ro._s_addr = NULL;
4383 net->src_addr_selected = 0;
4386 if (net->src_addr_selected == 0) {
4387 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4388 /* KAME hack: embed scopeid */
4389 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4390 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4394 /* Cache the source address */
4395 net->ro._s_addr = sctp_source_address_selection(inp,
4401 (void)sa6_recoverscope(sin6);
4402 net->src_addr_selected = 1;
4404 if (net->ro._s_addr == NULL) {
4405 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4406 net->src_addr_selected = 0;
4407 sctp_handle_no_route(stcb, net, so_locked);
4408 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4410 return (EHOSTUNREACH);
4412 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4414 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4415 /* KAME hack: embed scopeid */
4416 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4417 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4421 if (over_addr == NULL) {
4422 struct sctp_ifa *_lsrc;
4424 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4428 if (_lsrc == NULL) {
4429 sctp_handle_no_route(stcb, net, so_locked);
4430 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4432 return (EHOSTUNREACH);
4434 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4435 sctp_free_ifa(_lsrc);
4437 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4438 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4440 (void)sa6_recoverscope(sin6);
4442 lsa6->sin6_port = inp->sctp_lport;
4444 if (ro->ro_nh == NULL) {
4446 * src addr selection failed to find a route
4447 * (or valid source addr), so we can't get
4450 sctp_handle_no_route(stcb, net, so_locked);
4451 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4453 return (EHOSTUNREACH);
4456 * XXX: sa6 may not have a valid sin6_scope_id in
4457 * the non-SCOPEDROUTING case.
4459 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4460 lsa6_storage.sin6_family = AF_INET6;
4461 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4462 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4463 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4464 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4469 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4470 lsa6_storage.sin6_port = inp->sctp_lport;
4471 lsa6 = &lsa6_storage;
4472 ip6h->ip6_src = lsa6->sin6_addr;
4475 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4476 sctp_handle_no_route(stcb, net, so_locked);
4477 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4479 return (EHOSTUNREACH);
4481 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4482 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4483 udp->uh_dport = port;
4484 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4486 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4488 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4491 sctphdr->src_port = src_port;
4492 sctphdr->dest_port = dest_port;
4493 sctphdr->v_tag = v_tag;
4494 sctphdr->checksum = 0;
4497 * We set the hop limit now since there is a good
4498 * chance that our ro pointer is now filled
4500 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4501 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4504 /* Copy to be sure something bad is not happening */
4505 sin6->sin6_addr = ip6h->ip6_dst;
4506 lsa6->sin6_addr = ip6h->ip6_src;
4509 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4510 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4511 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4512 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4513 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4515 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4517 * preserve the port and scope for link
4520 prev_scope = sin6->sin6_scope_id;
4521 prev_port = sin6->sin6_port;
4524 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4525 /* failed to prepend data, give up */
4527 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4530 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4532 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4533 SCTP_STAT_INCR(sctps_sendswcrc);
4534 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4535 udp->uh_sum = 0xffff;
4538 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4539 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4540 SCTP_STAT_INCR(sctps_sendhwcrc);
4542 /* send it out. table id is taken from stcb */
4543 #ifdef SCTP_PACKET_LOGGING
4544 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4545 sctp_packet_log(o_pak);
4547 SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
4548 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4550 /* for link local this must be done */
4551 sin6->sin6_scope_id = prev_scope;
4552 sin6->sin6_port = prev_port;
4554 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4556 UDPSTAT_INC(udps_opackets);
4558 SCTP_STAT_INCR(sctps_sendpackets);
4559 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4561 SCTP_STAT_INCR(sctps_senderrors);
4564 /* Now if we had a temp route free it */
4568 * PMTU check versus smallest asoc MTU goes
4571 if (ro->ro_nh == NULL) {
4572 /* Route was freed */
4573 if (net->ro._s_addr &&
4574 net->src_addr_selected) {
4575 sctp_free_ifa(net->ro._s_addr);
4576 net->ro._s_addr = NULL;
4578 net->src_addr_selected = 0;
4580 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4581 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4584 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4587 mtu -= sizeof(struct udphdr);
4589 if (mtu < net->mtu) {
4590 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4591 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4597 if (ND_IFINFO(ifp)->linkmtu &&
4598 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4599 sctp_mtu_size_reset(inp,
4601 ND_IFINFO(ifp)->linkmtu);
4609 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4610 ((struct sockaddr *)to)->sa_family);
4612 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4618 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked)
4620 struct mbuf *m, *m_last;
4621 struct sctp_nets *net;
4622 struct sctp_init_chunk *init;
4623 struct sctp_supported_addr_param *sup_addr;
4624 struct sctp_adaptation_layer_indication *ali;
4625 struct sctp_supported_chunk_types_param *pr_supported;
4626 struct sctp_paramhdr *ph;
4627 int cnt_inits_to = 0;
4629 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4631 /* INIT's always go to the primary (and usually ONLY address) */
4632 net = stcb->asoc.primary_destination;
4634 net = TAILQ_FIRST(&stcb->asoc.nets);
4639 /* we confirm any address we send an INIT to */
4640 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4641 (void)sctp_set_primary_addr(stcb, NULL, net);
4643 /* we confirm any address we send an INIT to */
4644 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4646 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4648 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4650 * special hook, if we are sending to link local it will not
4651 * show up in our private address count.
4653 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4657 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4658 /* This case should not happen */
4659 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4662 /* start the INIT timer */
4663 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4665 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4667 /* No memory, INIT timer will re-attempt. */
4668 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4671 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4673 /* Now lets put the chunk header in place */
4674 init = mtod(m, struct sctp_init_chunk *);
4675 /* now the chunk header */
4676 init->ch.chunk_type = SCTP_INITIATION;
4677 init->ch.chunk_flags = 0;
4678 /* fill in later from mbuf we build */
4679 init->ch.chunk_length = 0;
4680 /* place in my tag */
4681 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4682 /* set up some of the credits. */
4683 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4684 SCTP_MINIMAL_RWND));
4685 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4686 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4687 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4689 /* Adaptation layer indication parameter */
4690 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4691 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4692 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4693 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4694 ali->ph.param_length = htons(parameter_len);
4695 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4696 chunk_len += parameter_len;
4700 if (stcb->asoc.ecn_supported == 1) {
4701 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4702 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4703 ph->param_type = htons(SCTP_ECN_CAPABLE);
4704 ph->param_length = htons(parameter_len);
4705 chunk_len += parameter_len;
4708 /* PR-SCTP supported parameter */
4709 if (stcb->asoc.prsctp_supported == 1) {
4710 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4711 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4712 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4713 ph->param_length = htons(parameter_len);
4714 chunk_len += parameter_len;
4717 /* Add NAT friendly parameter. */
4718 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4719 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4720 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4721 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4722 ph->param_length = htons(parameter_len);
4723 chunk_len += parameter_len;
4726 /* And now tell the peer which extensions we support */
4728 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4729 if (stcb->asoc.prsctp_supported == 1) {
4730 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4731 if (stcb->asoc.idata_supported) {
4732 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4735 if (stcb->asoc.auth_supported == 1) {
4736 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4738 if (stcb->asoc.asconf_supported == 1) {
4739 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4740 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4742 if (stcb->asoc.reconfig_supported == 1) {
4743 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4745 if (stcb->asoc.idata_supported) {
4746 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4748 if (stcb->asoc.nrsack_supported == 1) {
4749 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4751 if (stcb->asoc.pktdrop_supported == 1) {
4752 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4755 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4756 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4757 pr_supported->ph.param_length = htons(parameter_len);
4758 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4759 chunk_len += parameter_len;
4761 /* add authentication parameters */
4762 if (stcb->asoc.auth_supported) {
4763 /* attach RANDOM parameter, if available */
4764 if (stcb->asoc.authinfo.random != NULL) {
4765 struct sctp_auth_random *randp;
4767 if (padding_len > 0) {
4768 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4769 chunk_len += padding_len;
4772 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4773 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4774 /* random key already contains the header */
4775 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4776 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4777 chunk_len += parameter_len;
4779 /* add HMAC_ALGO parameter */
4780 if (stcb->asoc.local_hmacs != NULL) {
4781 struct sctp_auth_hmac_algo *hmacs;
4783 if (padding_len > 0) {
4784 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4785 chunk_len += padding_len;
4788 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4789 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4790 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4791 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4792 hmacs->ph.param_length = htons(parameter_len);
4793 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4794 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4795 chunk_len += parameter_len;
4797 /* add CHUNKS parameter */
4798 if (stcb->asoc.local_auth_chunks != NULL) {
4799 struct sctp_auth_chunk_list *chunks;
4801 if (padding_len > 0) {
4802 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4803 chunk_len += padding_len;
4806 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4807 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4808 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4809 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4810 chunks->ph.param_length = htons(parameter_len);
4811 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4812 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4813 chunk_len += parameter_len;
4817 /* now any cookie time extensions */
4818 if (stcb->asoc.cookie_preserve_req) {
4819 struct sctp_cookie_perserve_param *cookie_preserve;
4821 if (padding_len > 0) {
4822 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4823 chunk_len += padding_len;
4826 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4827 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4828 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4829 cookie_preserve->ph.param_length = htons(parameter_len);
4830 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4831 stcb->asoc.cookie_preserve_req = 0;
4832 chunk_len += parameter_len;
4835 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4838 if (padding_len > 0) {
4839 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4840 chunk_len += padding_len;
4843 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4844 if (stcb->asoc.scope.ipv4_addr_legal) {
4845 parameter_len += (uint16_t)sizeof(uint16_t);
4847 if (stcb->asoc.scope.ipv6_addr_legal) {
4848 parameter_len += (uint16_t)sizeof(uint16_t);
4850 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4851 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4852 sup_addr->ph.param_length = htons(parameter_len);
4854 if (stcb->asoc.scope.ipv4_addr_legal) {
4855 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4857 if (stcb->asoc.scope.ipv6_addr_legal) {
4858 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4860 padding_len = 4 - 2 * i;
4861 chunk_len += parameter_len;
4864 SCTP_BUF_LEN(m) = chunk_len;
4865 /* now the addresses */
4867 * To optimize this we could put the scoping stuff into a structure
4868 * and remove the individual uint8's from the assoc structure. Then
4869 * we could just sifa in the address within the stcb. But for now
4870 * this is a quick hack to get the address stuff teased apart.
4872 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4874 &padding_len, &chunk_len);
4876 init->ch.chunk_length = htons(chunk_len);
4877 if (padding_len > 0) {
4878 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4883 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4884 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4885 (struct sockaddr *)&net->ro._l_addr,
4886 m, 0, NULL, 0, 0, 0, 0,
4887 inp->sctp_lport, stcb->rport, htonl(0),
4891 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4892 if (error == ENOBUFS) {
4893 stcb->asoc.ifp_had_enobuf = 1;
4894 SCTP_STAT_INCR(sctps_lowlevelerr);
4897 stcb->asoc.ifp_had_enobuf = 0;
4899 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4900 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4904 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4905 int param_offset, int *abort_processing,
4906 struct sctp_chunkhdr *cp,
4911 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4912 * being equal to the beginning of the params i.e. (iphlen +
4913 * sizeof(struct sctp_init_msg) parse through the parameters to the
4914 * end of the mbuf verifying that all parameters are known.
4916 * For unknown parameters build and return a mbuf with
4917 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4918 * processing this chunk stop, and set *abort_processing to 1.
4920 * By having param_offset be pre-set to where parameters begin it is
4921 * hoped that this routine may be reused in the future by new
4924 struct sctp_paramhdr *phdr, params;
4926 struct mbuf *mat, *m_tmp, *op_err, *op_err_last;
4927 int at, limit, pad_needed;
4928 uint16_t ptype, plen, padded_size;
4930 *abort_processing = 0;
4931 if (cookie_found != NULL) {
4935 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4941 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4942 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4943 ptype = ntohs(phdr->param_type);
4944 plen = ntohs(phdr->param_length);
4945 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4946 /* wacked parameter */
4947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4950 limit -= SCTP_SIZE32(plen);
4952 * All parameters for all chunks that we know/understand are
4953 * listed here. We process them other places and make
4954 * appropriate stop actions per the upper bits. However this
4955 * is the generic routine processor's can call to get back
4956 * an operr.. to either incorporate (init-ack) or send.
4958 padded_size = SCTP_SIZE32(plen);
4960 /* Param's with variable size */
4961 case SCTP_HEARTBEAT_INFO:
4962 case SCTP_UNRECOG_PARAM:
4963 case SCTP_ERROR_CAUSE_IND:
4967 case SCTP_STATE_COOKIE:
4968 if (cookie_found != NULL) {
4973 /* Param's with variable size within a range */
4974 case SCTP_CHUNK_LIST:
4975 case SCTP_SUPPORTED_CHUNK_EXT:
4976 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4977 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4982 case SCTP_SUPPORTED_ADDRTYPE:
4983 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4984 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4990 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4991 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4996 case SCTP_SET_PRIM_ADDR:
4997 case SCTP_DEL_IP_ADDRESS:
4998 case SCTP_ADD_IP_ADDRESS:
4999 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5000 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5001 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5006 /* Param's with a fixed size */
5007 case SCTP_IPV4_ADDRESS:
5008 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5009 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5014 case SCTP_IPV6_ADDRESS:
5015 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5016 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5021 case SCTP_COOKIE_PRESERVE:
5022 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5023 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5028 case SCTP_HAS_NAT_SUPPORT:
5031 case SCTP_PRSCTP_SUPPORTED:
5032 if (padded_size != sizeof(struct sctp_paramhdr)) {
5033 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5038 case SCTP_ECN_CAPABLE:
5039 if (padded_size != sizeof(struct sctp_paramhdr)) {
5040 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5045 case SCTP_ULP_ADAPTATION:
5046 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5047 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5052 case SCTP_SUCCESS_REPORT:
5053 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5054 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5059 case SCTP_HOSTNAME_ADDRESS:
5061 /* Hostname parameters are deprecated. */
5062 struct sctp_gen_error_cause *cause;
5065 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5066 *abort_processing = 1;
5067 sctp_m_freem(op_err);
5071 l_len = SCTP_MIN_OVERHEAD;
5073 l_len = SCTP_MIN_V4_OVERHEAD;
5075 l_len += sizeof(struct sctp_chunkhdr);
5076 l_len += sizeof(struct sctp_gen_error_cause);
5077 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5078 if (op_err != NULL) {
5080 * Pre-reserve space for IP, SCTP,
5084 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5086 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5088 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5089 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5090 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5091 cause = mtod(op_err, struct sctp_gen_error_cause *);
5092 cause->code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5093 cause->length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
5094 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5095 if (SCTP_BUF_NEXT(op_err) == NULL) {
5096 sctp_m_freem(op_err);
5105 * we do not recognize the parameter figure out what
5108 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5109 if ((ptype & 0x4000) == 0x4000) {
5110 /* Report bit is set?? */
5111 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5112 if (op_err == NULL) {
5115 /* Ok need to try to get an mbuf */
5117 l_len = SCTP_MIN_OVERHEAD;
5119 l_len = SCTP_MIN_V4_OVERHEAD;
5121 l_len += sizeof(struct sctp_chunkhdr);
5122 l_len += sizeof(struct sctp_paramhdr);
5123 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5125 SCTP_BUF_LEN(op_err) = 0;
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5132 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5133 op_err_last = op_err;
5136 if (op_err != NULL) {
5137 /* If we have space */
5138 struct sctp_paramhdr *param;
5140 if (pad_needed > 0) {
5141 op_err_last = sctp_add_pad_tombuf(op_err_last, pad_needed);
5143 if (op_err_last == NULL) {
5144 sctp_m_freem(op_err);
5147 goto more_processing;
5149 if (M_TRAILINGSPACE(op_err_last) < (int)sizeof(struct sctp_paramhdr)) {
5150 m_tmp = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
5151 if (m_tmp == NULL) {
5152 sctp_m_freem(op_err);
5155 goto more_processing;
5157 SCTP_BUF_LEN(m_tmp) = 0;
5158 SCTP_BUF_NEXT(m_tmp) = NULL;
5159 SCTP_BUF_NEXT(op_err_last) = m_tmp;
5160 op_err_last = m_tmp;
5162 param = (struct sctp_paramhdr *)(mtod(op_err_last, caddr_t)+SCTP_BUF_LEN(op_err_last));
5163 param->param_type = htons(SCTP_UNRECOG_PARAM);
5164 param->param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
5165 SCTP_BUF_LEN(op_err_last) += sizeof(struct sctp_paramhdr);
5166 SCTP_BUF_NEXT(op_err_last) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5167 if (SCTP_BUF_NEXT(op_err_last) == NULL) {
5168 sctp_m_freem(op_err);
5171 goto more_processing;
5173 while (SCTP_BUF_NEXT(op_err_last) != NULL) {
5174 op_err_last = SCTP_BUF_NEXT(op_err_last);
5177 if (plen % 4 != 0) {
5178 pad_needed = 4 - (plen % 4);
5185 if ((ptype & 0x8000) == 0x0000) {
5186 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5189 /* skip this chunk and continue processing */
5190 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5191 at += SCTP_SIZE32(plen);
5195 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5199 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5200 *abort_processing = 1;
5201 sctp_m_freem(op_err);
5205 struct sctp_paramhdr *param;
5208 l_len = SCTP_MIN_OVERHEAD;
5210 l_len = SCTP_MIN_V4_OVERHEAD;
5212 l_len += sizeof(struct sctp_chunkhdr);
5213 l_len += (2 * sizeof(struct sctp_paramhdr));
5214 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5216 SCTP_BUF_LEN(op_err) = 0;
5218 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5220 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5222 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5223 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5224 SCTP_BUF_LEN(op_err) = 2 * sizeof(struct sctp_paramhdr);
5225 param = mtod(op_err, struct sctp_paramhdr *);
5226 param->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5227 param->param_length = htons(2 * sizeof(struct sctp_paramhdr));
5229 param->param_type = htons(ptype);
5230 param->param_length = htons(plen);
5237 sctp_are_there_new_addresses(struct sctp_association *asoc,
5238 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5241 * Given a INIT packet, look through the packet to verify that there
5242 * are NO new addresses. As we go through the parameters add reports
5243 * of any un-understood parameters that require an error. Also we
5244 * must return (1) to drop the packet if we see a un-understood
5245 * parameter that tells us to drop the chunk.
5247 struct sockaddr *sa_touse;
5248 struct sockaddr *sa;
5249 struct sctp_paramhdr *phdr, params;
5250 uint16_t ptype, plen;
5252 struct sctp_nets *net;
5255 struct sockaddr_in sin4, *sa4;
5258 struct sockaddr_in6 sin6, *sa6;
5262 memset(&sin4, 0, sizeof(sin4));
5263 sin4.sin_family = AF_INET;
5264 sin4.sin_len = sizeof(sin4);
5267 memset(&sin6, 0, sizeof(sin6));
5268 sin6.sin6_family = AF_INET6;
5269 sin6.sin6_len = sizeof(sin6);
5271 /* First what about the src address of the pkt ? */
5273 switch (src->sa_family) {
5276 if (asoc->scope.ipv4_addr_legal) {
5283 if (asoc->scope.ipv6_addr_legal) {
5294 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5295 sa = (struct sockaddr *)&net->ro._l_addr;
5296 if (sa->sa_family == src->sa_family) {
5298 if (sa->sa_family == AF_INET) {
5299 struct sockaddr_in *src4;
5301 sa4 = (struct sockaddr_in *)sa;
5302 src4 = (struct sockaddr_in *)src;
5303 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5310 if (sa->sa_family == AF_INET6) {
5311 struct sockaddr_in6 *src6;
5313 sa6 = (struct sockaddr_in6 *)sa;
5314 src6 = (struct sockaddr_in6 *)src;
5315 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5324 /* New address added! no need to look further. */
5328 /* Ok so far lets munge through the rest of the packet */
5329 offset += sizeof(struct sctp_init_chunk);
5330 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5333 ptype = ntohs(phdr->param_type);
5334 plen = ntohs(phdr->param_length);
5337 case SCTP_IPV4_ADDRESS:
5339 struct sctp_ipv4addr_param *p4, p4_buf;
5341 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5344 phdr = sctp_get_next_param(in_initpkt, offset,
5345 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5349 if (asoc->scope.ipv4_addr_legal) {
5350 p4 = (struct sctp_ipv4addr_param *)phdr;
5351 sin4.sin_addr.s_addr = p4->addr;
5352 sa_touse = (struct sockaddr *)&sin4;
5358 case SCTP_IPV6_ADDRESS:
5360 struct sctp_ipv6addr_param *p6, p6_buf;
5362 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5365 phdr = sctp_get_next_param(in_initpkt, offset,
5366 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5370 if (asoc->scope.ipv6_addr_legal) {
5371 p6 = (struct sctp_ipv6addr_param *)phdr;
5372 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5374 sa_touse = (struct sockaddr *)&sin6;
5384 /* ok, sa_touse points to one to check */
5386 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5387 sa = (struct sockaddr *)&net->ro._l_addr;
5388 if (sa->sa_family != sa_touse->sa_family) {
5392 if (sa->sa_family == AF_INET) {
5393 sa4 = (struct sockaddr_in *)sa;
5394 if (sa4->sin_addr.s_addr ==
5395 sin4.sin_addr.s_addr) {
5402 if (sa->sa_family == AF_INET6) {
5403 sa6 = (struct sockaddr_in6 *)sa;
5404 if (SCTP6_ARE_ADDR_EQUAL(
5413 /* New addr added! no need to look further */
5417 offset += SCTP_SIZE32(plen);
5418 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5424 * Given a MBUF chain that was sent into us containing an INIT. Build a
5425 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5426 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5427 * message (i.e. the struct sctp_init_msg).
5430 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5431 struct sctp_nets *src_net, struct mbuf *init_pkt,
5432 int iphlen, int offset,
5433 struct sockaddr *src, struct sockaddr *dst,
5434 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5435 uint8_t mflowtype, uint32_t mflowid,
5436 uint32_t vrf_id, uint16_t port)
5438 struct sctp_association *asoc;
5439 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5440 struct sctp_init_ack_chunk *initack;
5441 struct sctp_adaptation_layer_indication *ali;
5442 struct sctp_supported_chunk_types_param *pr_supported;
5443 struct sctp_paramhdr *ph;
5444 union sctp_sockstore *over_addr;
5445 struct sctp_scoping scp;
5448 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5449 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5450 struct sockaddr_in *sin;
5453 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5454 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5455 struct sockaddr_in6 *sin6;
5457 struct sockaddr *to;
5458 struct sctp_state_cookie stc;
5459 struct sctp_nets *net = NULL;
5460 uint8_t *signature = NULL;
5461 int cnt_inits_to = 0;
5462 uint16_t his_limit, i_want;
5464 int nat_friendly = 0;
5467 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5474 if ((asoc != NULL) &&
5475 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5476 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5478 * new addresses, out of here in non-cookie-wait
5481 * Send an ABORT, without the new address error
5482 * cause. This looks no different than if no
5483 * listener was present.
5485 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5487 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5488 mflowtype, mflowid, inp->fibnum,
5492 if (src_net != NULL && (src_net->port != port)) {
5494 * change of remote encapsulation port, out of here
5495 * in non-cookie-wait states
5497 * Send an ABORT, without an specific error cause.
5498 * This looks no different than if no listener was
5501 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5502 "Remote encapsulation port changed");
5503 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5504 mflowtype, mflowid, inp->fibnum,
5510 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5511 (offset + sizeof(struct sctp_init_chunk)),
5513 (struct sctp_chunkhdr *)init_chk,
5514 &nat_friendly, NULL);
5517 if (op_err == NULL) {
5518 char msg[SCTP_DIAG_INFO_LEN];
5520 SCTP_SNPRINTF(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5521 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5524 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5525 init_chk->init.initiate_tag, op_err,
5526 mflowtype, mflowid, inp->fibnum,
5530 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5532 /* No memory, INIT timer will re-attempt. */
5533 sctp_m_freem(op_err);
5536 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5540 * We might not overwrite the identification[] completely and on
5541 * some platforms time_entered will contain some padding. Therefore
5542 * zero out the cookie to avoid putting uninitialized memory on the
5545 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5547 /* the time I built cookie */
5548 (void)SCTP_GETTIME_TIMEVAL(&now);
5549 stc.time_entered.tv_sec = now.tv_sec;
5550 stc.time_entered.tv_usec = now.tv_usec;
5552 /* populate any tie tags */
5554 /* unlock before tag selections */
5555 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5556 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5557 stc.cookie_life = asoc->cookie_life;
5558 net = asoc->primary_destination;
5560 stc.tie_tag_my_vtag = 0;
5561 stc.tie_tag_peer_vtag = 0;
5562 /* life I will award this cookie */
5563 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5566 /* copy in the ports for later check */
5567 stc.myport = sh->dest_port;
5568 stc.peerport = sh->src_port;
5571 * If we wanted to honor cookie life extensions, we would add to
5572 * stc.cookie_life. For now we should NOT honor any extension
5574 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5575 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5576 stc.ipv6_addr_legal = 1;
5577 if (SCTP_IPV6_V6ONLY(inp)) {
5578 stc.ipv4_addr_legal = 0;
5580 stc.ipv4_addr_legal = 1;
5583 stc.ipv6_addr_legal = 0;
5584 stc.ipv4_addr_legal = 1;
5589 switch (dst->sa_family) {
5593 /* lookup address */
5594 stc.address[0] = src4->sin_addr.s_addr;
5598 stc.addr_type = SCTP_IPV4_ADDRESS;
5599 /* local from address */
5600 stc.laddress[0] = dst4->sin_addr.s_addr;
5601 stc.laddress[1] = 0;
5602 stc.laddress[2] = 0;
5603 stc.laddress[3] = 0;
5604 stc.laddr_type = SCTP_IPV4_ADDRESS;
5605 /* scope_id is only for v6 */
5607 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5608 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5611 /* Must use the address in this case */
5612 if (sctp_is_address_on_local_host(src, vrf_id)) {
5613 stc.loopback_scope = 1;
5616 stc.local_scope = 0;
5624 stc.addr_type = SCTP_IPV6_ADDRESS;
5625 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5626 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5627 if (sctp_is_address_on_local_host(src, vrf_id)) {
5628 stc.loopback_scope = 1;
5629 stc.local_scope = 0;
5632 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5633 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5635 * If the new destination or source
5636 * is a LINK_LOCAL we must have
5637 * common both site and local scope.
5638 * Don't set local scope though
5639 * since we must depend on the
5640 * source to be added implicitly. We
5641 * cannot assure just because we
5642 * share one link that all links are
5645 stc.local_scope = 0;
5649 * we start counting for the private
5650 * address stuff at 1. since the
5651 * link local we source from won't
5652 * show up in our scoped count.
5656 * pull out the scope_id from
5659 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5660 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5662 * If the new destination or source
5663 * is SITE_LOCAL then we must have
5664 * site scope in common.
5668 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5669 stc.laddr_type = SCTP_IPV6_ADDRESS;
5679 /* set the scope per the existing tcb */
5682 struct sctp_nets *lnet;
5685 stc.loopback_scope = asoc->scope.loopback_scope;
5686 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5687 stc.site_scope = asoc->scope.site_scope;
5688 stc.local_scope = asoc->scope.local_scope;
5690 /* Why do we not consider IPv4 LL addresses? */
5691 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5692 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5693 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5695 * if we have a LL address, start
5703 /* use the net pointer */
5704 to = (struct sockaddr *)&net->ro._l_addr;
5705 switch (to->sa_family) {
5708 sin = (struct sockaddr_in *)to;
5709 stc.address[0] = sin->sin_addr.s_addr;
5713 stc.addr_type = SCTP_IPV4_ADDRESS;
5714 if (net->src_addr_selected == 0) {
5716 * strange case here, the INIT should have
5717 * did the selection.
5719 net->ro._s_addr = sctp_source_address_selection(inp,
5720 stcb, (sctp_route_t *)&net->ro,
5722 if (net->ro._s_addr == NULL) {
5723 sctp_m_freem(op_err);
5728 net->src_addr_selected = 1;
5730 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5731 stc.laddress[1] = 0;
5732 stc.laddress[2] = 0;
5733 stc.laddress[3] = 0;
5734 stc.laddr_type = SCTP_IPV4_ADDRESS;
5735 /* scope_id is only for v6 */
5741 sin6 = (struct sockaddr_in6 *)to;
5742 memcpy(&stc.address, &sin6->sin6_addr,
5743 sizeof(struct in6_addr));
5744 stc.addr_type = SCTP_IPV6_ADDRESS;
5745 stc.scope_id = sin6->sin6_scope_id;
5746 if (net->src_addr_selected == 0) {
5748 * strange case here, the INIT should have
5749 * done the selection.
5751 net->ro._s_addr = sctp_source_address_selection(inp,
5752 stcb, (sctp_route_t *)&net->ro,
5754 if (net->ro._s_addr == NULL) {
5755 sctp_m_freem(op_err);
5760 net->src_addr_selected = 1;
5762 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5763 sizeof(struct in6_addr));
5764 stc.laddr_type = SCTP_IPV6_ADDRESS;
5769 /* Now lets put the SCTP header in place */
5770 initack = mtod(m, struct sctp_init_ack_chunk *);
5771 /* Save it off for quick ref */
5772 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5774 memcpy(stc.identification, SCTP_VERSION_STRING,
5775 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5776 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5777 /* now the chunk header */
5778 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5779 initack->ch.chunk_flags = 0;
5780 /* fill in later from mbuf we build */
5781 initack->ch.chunk_length = 0;
5782 /* place in my tag */
5783 if ((asoc != NULL) &&
5784 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5785 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5786 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5787 /* re-use the v-tags and init-seq here */
5788 initack->init.initiate_tag = htonl(asoc->my_vtag);
5789 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5791 uint32_t vtag, itsn;
5794 atomic_add_int(&asoc->refcnt, 1);
5795 SCTP_TCB_UNLOCK(stcb);
5797 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5798 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5800 * Got a duplicate vtag on some guy behind a
5801 * nat make sure we don't use it.
5805 initack->init.initiate_tag = htonl(vtag);
5806 /* get a TSN to use too */
5807 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5808 initack->init.initial_tsn = htonl(itsn);
5809 SCTP_TCB_LOCK(stcb);
5810 atomic_add_int(&asoc->refcnt, -1);
5812 SCTP_INP_INCR_REF(inp);
5813 SCTP_INP_RUNLOCK(inp);
5814 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5815 initack->init.initiate_tag = htonl(vtag);
5816 /* get a TSN to use too */
5817 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5818 SCTP_INP_RLOCK(inp);
5819 SCTP_INP_DECR_REF(inp);
5822 /* save away my tag to */
5823 stc.my_vtag = initack->init.initiate_tag;
5825 /* set up some of the credits. */
5826 so = inp->sctp_socket;
5828 /* memory problem */
5829 sctp_m_freem(op_err);
5833 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5835 /* set what I want */
5836 his_limit = ntohs(init_chk->init.num_inbound_streams);
5837 /* choose what I want */
5839 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5840 i_want = asoc->streamoutcnt;
5842 i_want = asoc->pre_open_streams;
5845 i_want = inp->sctp_ep.pre_open_stream_count;
5847 if (his_limit < i_want) {
5848 /* I Want more :< */
5849 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5851 /* I can have what I want :> */
5852 initack->init.num_outbound_streams = htons(i_want);
5854 /* tell him his limit. */
5855 initack->init.num_inbound_streams =
5856 htons(inp->sctp_ep.max_open_streams_intome);
5858 /* adaptation layer indication parameter */
5859 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5860 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5861 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5862 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5863 ali->ph.param_length = htons(parameter_len);
5864 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5865 chunk_len += parameter_len;
5869 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5870 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5871 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5872 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5873 ph->param_type = htons(SCTP_ECN_CAPABLE);
5874 ph->param_length = htons(parameter_len);
5875 chunk_len += parameter_len;
5878 /* PR-SCTP supported parameter */
5879 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5880 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5881 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5882 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5883 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5884 ph->param_length = htons(parameter_len);
5885 chunk_len += parameter_len;
5888 /* Add NAT friendly parameter */
5890 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5891 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5892 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5893 ph->param_length = htons(parameter_len);
5894 chunk_len += parameter_len;
5897 /* And now tell the peer which extensions we support */
5899 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5900 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5901 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5902 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5903 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5904 ((asoc == NULL) && (inp->idata_supported == 1))) {
5905 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5908 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5909 ((asoc == NULL) && (inp->auth_supported == 1))) {
5910 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5912 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5913 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5914 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5915 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5917 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5918 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5919 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5921 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5922 ((asoc == NULL) && (inp->idata_supported == 1))) {
5923 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5925 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5926 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5927 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5929 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5930 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5931 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5934 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5935 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5936 pr_supported->ph.param_length = htons(parameter_len);
5937 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5938 chunk_len += parameter_len;
5941 /* add authentication parameters */
5942 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5943 ((asoc == NULL) && (inp->auth_supported == 1))) {
5944 struct sctp_auth_random *randp;
5945 struct sctp_auth_hmac_algo *hmacs;
5946 struct sctp_auth_chunk_list *chunks;
5948 if (padding_len > 0) {
5949 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5950 chunk_len += padding_len;
5953 /* generate and add RANDOM parameter */
5954 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5955 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
5956 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5957 randp->ph.param_type = htons(SCTP_RANDOM);
5958 randp->ph.param_length = htons(parameter_len);
5959 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5960 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5961 chunk_len += parameter_len;
5963 if (padding_len > 0) {
5964 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5965 chunk_len += padding_len;
5968 /* add HMAC_ALGO parameter */
5969 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5970 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
5971 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5972 (uint8_t *)hmacs->hmac_ids);
5973 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5974 hmacs->ph.param_length = htons(parameter_len);
5975 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5976 chunk_len += parameter_len;
5978 if (padding_len > 0) {
5979 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5980 chunk_len += padding_len;
5983 /* add CHUNKS parameter */
5984 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5985 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
5986 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5987 chunks->chunk_types);
5988 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5989 chunks->ph.param_length = htons(parameter_len);
5990 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5991 chunk_len += parameter_len;
5993 SCTP_BUF_LEN(m) = chunk_len;
5995 /* now the addresses */
5997 * To optimize this we could put the scoping stuff into a structure
5998 * and remove the individual uint8's from the stc structure. Then we
5999 * could just sifa in the address within the stc.. but for now this
6000 * is a quick hack to get the address stuff teased apart.
6002 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6003 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6004 scp.loopback_scope = stc.loopback_scope;
6005 scp.ipv4_local_scope = stc.ipv4_scope;
6006 scp.local_scope = stc.local_scope;
6007 scp.site_scope = stc.site_scope;
6008 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6010 &padding_len, &chunk_len);
6011 /* padding_len can only be positive, if no addresses have been added */
6012 if (padding_len > 0) {
6013 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6014 chunk_len += padding_len;
6015 SCTP_BUF_LEN(m) += padding_len;
6019 /* tack on the operational error if present */
6022 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6023 parameter_len += SCTP_BUF_LEN(m_tmp);
6025 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6026 SCTP_BUF_NEXT(m_last) = op_err;
6027 while (SCTP_BUF_NEXT(m_last) != NULL) {
6028 m_last = SCTP_BUF_NEXT(m_last);
6030 chunk_len += parameter_len;
6032 if (padding_len > 0) {
6033 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6034 if (m_last == NULL) {
6035 /* Houston we have a problem, no space */
6039 chunk_len += padding_len;
6042 /* Now we must build a cookie */
6043 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6044 if (m_cookie == NULL) {
6045 /* memory problem */
6049 /* Now append the cookie to the end and update the space/size */
6050 SCTP_BUF_NEXT(m_last) = m_cookie;
6052 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6053 parameter_len += SCTP_BUF_LEN(m_tmp);
6054 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6058 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6059 chunk_len += parameter_len;
6062 * Place in the size, but we don't include the last pad (if any) in
6065 initack->ch.chunk_length = htons(chunk_len);
6068 * Time to sign the cookie, we don't sign over the cookie signature
6069 * though thus we set trailer.
6071 (void)sctp_hmac_m(SCTP_HMAC,
6072 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6073 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6074 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6076 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6077 * here since the timer will drive a retranmission.
6079 if (padding_len > 0) {
6080 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6085 if (stc.loopback_scope) {
6086 over_addr = (union sctp_sockstore *)dst;
6091 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6093 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6096 SCTP_SO_NOT_LOCKED))) {
6097 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6098 if (error == ENOBUFS) {
6100 asoc->ifp_had_enobuf = 1;
6102 SCTP_STAT_INCR(sctps_lowlevelerr);
6106 asoc->ifp_had_enobuf = 0;
6109 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6113 sctp_prune_prsctp(struct sctp_tcb *stcb,
6114 struct sctp_association *asoc,
6115 struct sctp_sndrcvinfo *srcv,
6119 struct sctp_tmit_chunk *chk, *nchk;
6121 SCTP_TCB_LOCK_ASSERT(stcb);
6122 if ((asoc->prsctp_supported) &&
6123 (asoc->sent_queue_cnt_removeable > 0)) {
6124 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6126 * Look for chunks marked with the PR_SCTP flag AND
6127 * the buffer space flag. If the one being sent is
6128 * equal or greater priority then purge the old one
6129 * and free some space.
6131 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6133 * This one is PR-SCTP AND buffer space
6136 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6138 * Lower numbers equates to higher
6139 * priority. So if the one we are
6140 * looking at has a larger priority,
6141 * we want to drop the data and NOT
6146 * We release the book_size
6147 * if the mbuf is here
6152 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6156 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6159 freed_spc += ret_spc;
6160 if (freed_spc >= dataout) {
6163 } /* if chunk was present */
6164 } /* if of sufficient priority */
6165 } /* if chunk has enabled */
6166 } /* tailqforeach */
6168 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6169 /* Here we must move to the sent queue and mark */
6170 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6171 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6174 * We release the book_size
6175 * if the mbuf is here
6179 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6182 freed_spc += ret_spc;
6183 if (freed_spc >= dataout) {
6186 } /* end if chk->data */
6187 } /* end if right class */
6188 } /* end if chk pr-sctp */
6189 } /* tailqforeachsafe (chk) */
6190 } /* if enabled in asoc */
6194 sctp_get_frag_point(struct sctp_tcb *stcb,
6195 struct sctp_association *asoc)
6200 * For endpoints that have both v6 and v4 addresses we must reserve
6201 * room for the ipv6 header, for those that are only dealing with V4
6202 * we use a larger frag point.
6204 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6205 ovh = SCTP_MIN_OVERHEAD;
6207 ovh = SCTP_MIN_V4_OVERHEAD;
6209 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6210 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6211 siz = asoc->smallest_mtu - ovh;
6213 siz = (stcb->asoc.sctp_frag_point - ovh);
6215 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6217 /* A data chunk MUST fit in a cluster */
6218 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6221 /* adjust for an AUTH chunk if DATA requires auth */
6222 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6223 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6226 /* make it an even word boundary please */
6233 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6236 * We assume that the user wants PR_SCTP_TTL if the user provides a
6237 * positive lifetime but does not specify any PR_SCTP policy.
6239 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6240 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6241 } else if (sp->timetolive > 0) {
6242 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6243 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6247 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6248 case CHUNK_FLAGS_PR_SCTP_BUF:
6250 * Time to live is a priority stored in tv_sec when doing
6251 * the buffer drop thing.
6253 sp->ts.tv_sec = sp->timetolive;
6256 case CHUNK_FLAGS_PR_SCTP_TTL:
6260 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6261 tv.tv_sec = sp->timetolive / 1000;
6262 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6264 * TODO sctp_constants.h needs alternative time
6265 * macros when _KERNEL is undefined.
6267 timevaladd(&sp->ts, &tv);
6270 case CHUNK_FLAGS_PR_SCTP_RTX:
6272 * Time to live is a the number or retransmissions stored in
6275 sp->ts.tv_sec = sp->timetolive;
6279 SCTPDBG(SCTP_DEBUG_USRREQ1,
6280 "Unknown PR_SCTP policy %u.\n",
6281 PR_SCTP_POLICY(sp->sinfo_flags));
6287 sctp_msg_append(struct sctp_tcb *stcb,
6288 struct sctp_nets *net,
6290 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6294 struct sctp_stream_queue_pending *sp = NULL;
6295 struct sctp_stream_out *strm;
6298 * Given an mbuf chain, put it into the association send queue and
6299 * place it on the wheel
6301 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6302 /* Invalid stream number */
6303 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6307 if ((stcb->asoc.stream_locked) &&
6308 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6309 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6313 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6314 /* Now can we send this? */
6315 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6316 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6317 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6318 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6319 /* got data while shutting down */
6320 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6324 sctp_alloc_a_strmoq(stcb, sp);
6326 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6330 sp->sinfo_flags = srcv->sinfo_flags;
6331 sp->timetolive = srcv->sinfo_timetolive;
6332 sp->ppid = srcv->sinfo_ppid;
6333 sp->context = srcv->sinfo_context;
6335 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6337 atomic_add_int(&sp->net->ref_count, 1);
6341 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6342 sp->sid = srcv->sinfo_stream;
6343 sp->msg_is_complete = 1;
6344 sp->sender_all_done = 1;
6347 sp->tail_mbuf = NULL;
6348 sctp_set_prsctp_policy(sp);
6350 * We could in theory (for sendall) sifa the length in, but we would
6351 * still have to hunt through the chain since we need to setup the
6355 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6356 if (SCTP_BUF_NEXT(at) == NULL)
6358 sp->length += SCTP_BUF_LEN(at);
6360 if (srcv->sinfo_keynumber_valid) {
6361 sp->auth_keyid = srcv->sinfo_keynumber;
6363 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6365 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6366 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6367 sp->holds_key_ref = 1;
6369 if (hold_stcb_lock == 0) {
6370 SCTP_TCB_SEND_LOCK(stcb);
6372 sctp_snd_sb_alloc(stcb, sp->length);
6373 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6374 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6375 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6377 if (hold_stcb_lock == 0) {
6378 SCTP_TCB_SEND_UNLOCK(stcb);
6387 static struct mbuf *
6388 sctp_copy_mbufchain(struct mbuf *clonechain,
6389 struct mbuf *outchain,
6390 struct mbuf **endofchain,
6393 uint8_t copy_by_ref)
6396 struct mbuf *appendchain;
6400 if (endofchain == NULL) {
6404 sctp_m_freem(outchain);
6407 if (can_take_mbuf) {
6408 appendchain = clonechain;
6411 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))) {
6412 /* Its not in a cluster */
6413 if (*endofchain == NULL) {
6414 /* lets get a mbuf cluster */
6415 if (outchain == NULL) {
6416 /* This is the general case */
6418 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6419 if (outchain == NULL) {
6422 SCTP_BUF_LEN(outchain) = 0;
6423 *endofchain = outchain;
6424 /* get the prepend space */
6425 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6428 * We really should not get a NULL
6434 if (SCTP_BUF_NEXT(m) == NULL) {
6438 m = SCTP_BUF_NEXT(m);
6441 if (*endofchain == NULL) {
6443 * huh, TSNH XXX maybe we
6446 sctp_m_freem(outchain);
6450 /* get the new end of length */
6451 len = (int)M_TRAILINGSPACE(*endofchain);
6453 /* how much is left at the end? */
6454 len = (int)M_TRAILINGSPACE(*endofchain);
6456 /* Find the end of the data, for appending */
6457 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6459 /* Now lets copy it out */
6460 if (len >= sizeofcpy) {
6461 /* It all fits, copy it in */
6462 m_copydata(clonechain, 0, sizeofcpy, cp);
6463 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6465 /* fill up the end of the chain */
6467 m_copydata(clonechain, 0, len, cp);
6468 SCTP_BUF_LEN((*endofchain)) += len;
6469 /* now we need another one */
6472 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6477 SCTP_BUF_NEXT((*endofchain)) = m;
6479 cp = mtod((*endofchain), caddr_t);
6480 m_copydata(clonechain, len, sizeofcpy, cp);
6481 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6485 /* copy the old fashion way */
6486 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6487 #ifdef SCTP_MBUF_LOGGING
6488 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6489 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6494 if (appendchain == NULL) {
6497 sctp_m_freem(outchain);
6501 /* tack on to the end */
6502 if (*endofchain != NULL) {
6503 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6507 if (SCTP_BUF_NEXT(m) == NULL) {
6508 SCTP_BUF_NEXT(m) = appendchain;
6511 m = SCTP_BUF_NEXT(m);
6515 * save off the end and update the end-chain position
6519 if (SCTP_BUF_NEXT(m) == NULL) {
6523 m = SCTP_BUF_NEXT(m);
6527 /* save off the end and update the end-chain position */
6530 if (SCTP_BUF_NEXT(m) == NULL) {
6534 m = SCTP_BUF_NEXT(m);
6536 return (appendchain);
6541 sctp_med_chunk_output(struct sctp_inpcb *inp,
6542 struct sctp_tcb *stcb,
6543 struct sctp_association *asoc,
6546 int control_only, int from_where,
6547 struct timeval *now, int *now_filled, int frag_point, int so_locked);
6550 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6551 uint32_t val SCTP_UNUSED)
6553 struct sctp_copy_all *ca;
6556 int added_control = 0;
6557 int un_sent, do_chunk_output = 1;
6558 struct sctp_association *asoc;
6559 struct sctp_nets *net;
6561 ca = (struct sctp_copy_all *)ptr;
6562 if (ca->m == NULL) {
6565 if (ca->inp != inp) {
6569 if (ca->sndlen > 0) {
6570 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6572 /* can't copy so we are done */
6576 #ifdef SCTP_MBUF_LOGGING
6577 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6578 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6584 SCTP_TCB_LOCK_ASSERT(stcb);
6585 if (stcb->asoc.alternate) {
6586 net = stcb->asoc.alternate;
6588 net = stcb->asoc.primary_destination;
6590 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6591 /* Abort this assoc with m as the user defined reason */
6593 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6595 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6596 0, M_NOWAIT, 1, MT_DATA);
6597 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6600 struct sctp_paramhdr *ph;
6602 ph = mtod(m, struct sctp_paramhdr *);
6603 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6604 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6607 * We add one here to keep the assoc from dis-appearing on
6610 atomic_add_int(&stcb->asoc.refcnt, 1);
6611 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6613 * sctp_abort_an_association calls sctp_free_asoc() free
6614 * association will NOT free it since we incremented the
6615 * refcnt .. we do this to prevent it being freed and things
6616 * getting tricky since we could end up (from free_asoc)
6617 * calling inpcb_free which would get a recursive lock call
6618 * to the iterator lock.. But as a consequence of that the
6619 * stcb will return to us un-locked.. since free_asoc
6620 * returns with either no TCB or the TCB unlocked, we must
6621 * relock.. to unlock in the iterator timer :-0
6623 SCTP_TCB_LOCK(stcb);
6624 atomic_add_int(&stcb->asoc.refcnt, -1);
6625 goto no_chunk_output;
6628 ret = sctp_msg_append(stcb, net, m,
6632 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6633 /* shutdown this assoc */
6634 if (TAILQ_EMPTY(&asoc->send_queue) &&
6635 TAILQ_EMPTY(&asoc->sent_queue) &&
6636 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6637 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6641 * there is nothing queued to send, so I'm
6644 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6645 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6646 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6648 * only send SHUTDOWN the first time
6651 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6652 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6654 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6655 sctp_stop_timers_for_shutdown(stcb);
6656 sctp_send_shutdown(stcb, net);
6657 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6659 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6662 do_chunk_output = 0;
6666 * we still got (or just got) data to send,
6667 * so set SHUTDOWN_PENDING
6670 * XXX sockets draft says that SCTP_EOF
6671 * should be sent with no data. currently,
6672 * we will allow user data to be sent first
6673 * and move to SHUTDOWN-PENDING
6675 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6676 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6677 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6678 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6679 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6681 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6682 if (TAILQ_EMPTY(&asoc->send_queue) &&
6683 TAILQ_EMPTY(&asoc->sent_queue) &&
6684 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6685 struct mbuf *op_err;
6686 char msg[SCTP_DIAG_INFO_LEN];
6689 SCTP_SNPRINTF(msg, sizeof(msg),
6690 "%s:%d at %s", __FILE__, __LINE__, __func__);
6691 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6693 atomic_add_int(&stcb->asoc.refcnt, 1);
6694 sctp_abort_an_association(stcb->sctp_ep, stcb,
6695 op_err, SCTP_SO_NOT_LOCKED);
6696 atomic_add_int(&stcb->asoc.refcnt, -1);
6697 goto no_chunk_output;
6699 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6705 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6706 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6708 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6709 (stcb->asoc.total_flight > 0) &&
6710 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6711 do_chunk_output = 0;
6713 if (do_chunk_output)
6714 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6715 else if (added_control) {
6716 int num_out, reason, now_filled = 0;
6720 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6721 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6722 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6733 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6735 struct sctp_copy_all *ca;
6737 ca = (struct sctp_copy_all *)ptr;
6739 * Do a notify here? Kacheong suggests that the notify be done at
6740 * the send time.. so you would push up a notification if any send
6741 * failed. Don't know if this is feasible since the only failures we
6742 * have is "memory" related and if you cannot get an mbuf to send
6743 * the data you surely can't get an mbuf to send up to notify the
6744 * user you can't send the data :->
6747 /* now free everything */
6749 /* Lets clear the flag to allow others to run. */
6750 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6752 sctp_m_freem(ca->m);
6753 SCTP_FREE(ca, SCTP_M_COPYAL);
6756 static struct mbuf *
6757 sctp_copy_out_all(struct uio *uio, ssize_t len)
6759 struct mbuf *ret, *at;
6760 ssize_t left, willcpy, cancpy, error;
6762 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6768 SCTP_BUF_LEN(ret) = 0;
6769 /* save space for the data chunk header */
6770 cancpy = (int)M_TRAILINGSPACE(ret);
6771 willcpy = min(cancpy, left);
6774 /* Align data to the end */
6775 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6781 SCTP_BUF_LEN(at) = (int)willcpy;
6782 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6785 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6786 if (SCTP_BUF_NEXT(at) == NULL) {
6789 at = SCTP_BUF_NEXT(at);
6790 SCTP_BUF_LEN(at) = 0;
6791 cancpy = (int)M_TRAILINGSPACE(at);
6792 willcpy = min(cancpy, left);
6799 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6800 struct sctp_sndrcvinfo *srcv)
6803 struct sctp_copy_all *ca;
6805 if (inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) {
6806 /* There is another. */
6809 if (uio->uio_resid > (ssize_t)SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
6810 /* You must not be larger than the limit! */
6813 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6817 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6820 memset(ca, 0, sizeof(struct sctp_copy_all));
6824 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6827 * take off the sendall flag, it would be bad if we failed to do
6830 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6831 /* get length and mbuf chain */
6833 ca->sndlen = uio->uio_resid;
6834 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6835 if (ca->m == NULL) {
6836 SCTP_FREE(ca, SCTP_M_COPYAL);
6837 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6841 /* Gather the length of the send */
6845 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6846 ca->sndlen += SCTP_BUF_LEN(mat);
6849 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6850 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6851 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6852 SCTP_ASOC_ANY_STATE,
6854 sctp_sendall_completes, inp, 1);
6856 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6857 SCTP_FREE(ca, SCTP_M_COPYAL);
6858 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6865 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6867 struct sctp_tmit_chunk *chk, *nchk;
6869 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6870 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6871 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6872 asoc->ctrl_queue_cnt--;
6874 sctp_m_freem(chk->data);
6877 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6883 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6885 struct sctp_association *asoc;
6886 struct sctp_tmit_chunk *chk, *nchk;
6887 struct sctp_asconf_chunk *acp;
6890 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6891 /* find SCTP_ASCONF chunk in queue */
6892 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6894 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6895 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6900 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6901 asoc->ctrl_queue_cnt--;
6903 sctp_m_freem(chk->data);
6906 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6912 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6913 struct sctp_association *asoc,
6914 struct sctp_tmit_chunk **data_list,
6916 struct sctp_nets *net)
6919 struct sctp_tmit_chunk *tp1;
6921 for (i = 0; i < bundle_at; i++) {
6922 /* off of the send queue */
6923 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6924 asoc->send_queue_cnt--;
6927 * Any chunk NOT 0 you zap the time chunk 0 gets
6928 * zapped or set based on if a RTO measurment is
6931 data_list[i]->do_rtt = 0;
6934 data_list[i]->sent_rcv_time = net->last_sent_time;
6935 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6936 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6937 if (data_list[i]->whoTo == NULL) {
6938 data_list[i]->whoTo = net;
6939 atomic_add_int(&net->ref_count, 1);
6941 /* on to the sent queue */
6942 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6943 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6944 struct sctp_tmit_chunk *tpp;
6946 /* need to move back */
6948 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6950 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6954 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6957 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6959 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6964 /* This does not lower until the cum-ack passes it */
6965 asoc->sent_queue_cnt++;
6966 if ((asoc->peers_rwnd <= 0) &&
6967 (asoc->total_flight == 0) &&
6969 /* Mark the chunk as being a window probe */
6970 SCTP_STAT_INCR(sctps_windowprobed);
6972 #ifdef SCTP_AUDITING_ENABLED
6973 sctp_audit_log(0xC2, 3);
6975 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6976 data_list[i]->snd_count = 1;
6977 data_list[i]->rec.data.chunk_was_revoked = 0;
6978 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6979 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6980 data_list[i]->whoTo->flight_size,
6981 data_list[i]->book_size,
6982 (uint32_t)(uintptr_t)data_list[i]->whoTo,
6983 data_list[i]->rec.data.tsn);
6985 sctp_flight_size_increase(data_list[i]);
6986 sctp_total_flight_increase(stcb, data_list[i]);
6987 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6988 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6989 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6991 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6992 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6993 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6994 /* SWS sender side engages */
6995 asoc->peers_rwnd = 0;
6998 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6999 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7004 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked)
7006 struct sctp_tmit_chunk *chk, *nchk;
7008 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7009 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7010 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7011 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7012 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7013 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7014 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7015 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7016 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7017 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7018 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7019 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7020 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7021 /* Stray chunks must be cleaned up */
7023 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7024 asoc->ctrl_queue_cnt--;
7026 sctp_m_freem(chk->data);
7029 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7030 asoc->fwd_tsn_cnt--;
7032 sctp_free_a_chunk(stcb, chk, so_locked);
7033 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7034 /* special handling, we must look into the param */
7035 if (chk != asoc->str_reset) {
7036 goto clean_up_anyway;
7043 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7044 uint32_t space_left, uint32_t frag_point, int eeor_on)
7047 * Make a decision on if I should split a msg into multiple parts.
7048 * This is only asked of incomplete messages.
7052 * If we are doing EEOR we need to always send it if its the
7053 * entire thing, since it might be all the guy is putting in
7056 if (space_left >= length) {
7058 * If we have data outstanding,
7059 * we get another chance when the sack
7060 * arrives to transmit - wait for more data
7062 if (stcb->asoc.total_flight == 0) {
7064 * If nothing is in flight, we zero the
7072 /* You can fill the rest */
7073 return (space_left);
7077 * For those strange folk that make the send buffer
7078 * smaller than our fragmentation point, we can't
7079 * get a full msg in so we have to allow splitting.
7081 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7084 if ((length <= space_left) ||
7085 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7086 /* Sub-optimial residual don't split in non-eeor mode. */
7090 * If we reach here length is larger than the space_left. Do we wish
7091 * to split it for the sake of packet putting together?
7093 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7094 /* Its ok to split it */
7095 return (min(space_left, frag_point));
7097 /* Nope, can't split */
7102 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7103 struct sctp_stream_out *strq,
7104 uint32_t space_left,
7105 uint32_t frag_point,
7111 /* Move from the stream to the send_queue keeping track of the total */
7112 struct sctp_association *asoc;
7113 struct sctp_stream_queue_pending *sp;
7114 struct sctp_tmit_chunk *chk;
7115 struct sctp_data_chunk *dchkh = NULL;
7116 struct sctp_idata_chunk *ndchkh = NULL;
7117 uint32_t to_move, length;
7119 uint8_t rcv_flags = 0;
7121 uint8_t send_lock_up = 0;
7123 SCTP_TCB_LOCK_ASSERT(stcb);
7126 /* sa_ignore FREED_MEMORY */
7127 sp = TAILQ_FIRST(&strq->outqueue);
7129 if (send_lock_up == 0) {
7130 SCTP_TCB_SEND_LOCK(stcb);
7133 sp = TAILQ_FIRST(&strq->outqueue);
7137 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7138 (stcb->asoc.idata_supported == 0) &&
7139 (strq->last_msg_incomplete)) {
7140 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7142 strq->last_msg_incomplete);
7143 strq->last_msg_incomplete = 0;
7147 SCTP_TCB_SEND_UNLOCK(stcb);
7152 if ((sp->msg_is_complete) && (sp->length == 0)) {
7153 if (sp->sender_all_done) {
7155 * We are doing deferred cleanup. Last time through
7156 * when we took all the data the sender_all_done was
7159 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7160 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7161 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7162 sp->sender_all_done,
7164 sp->msg_is_complete,
7168 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7169 SCTP_TCB_SEND_LOCK(stcb);
7172 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7173 TAILQ_REMOVE(&strq->outqueue, sp, next);
7174 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7175 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7176 (strq->chunks_on_queues == 0) &&
7177 TAILQ_EMPTY(&strq->outqueue)) {
7178 stcb->asoc.trigger_reset = 1;
7181 sctp_free_remote_addr(sp->net);
7185 sctp_m_freem(sp->data);
7188 sctp_free_a_strmoq(stcb, sp, so_locked);
7189 /* we can't be locked to it */
7191 SCTP_TCB_SEND_UNLOCK(stcb);
7194 /* back to get the next msg */
7198 * sender just finished this but still holds a
7206 /* is there some to get */
7207 if (sp->length == 0) {
7212 } else if (sp->discard_rest) {
7213 if (send_lock_up == 0) {
7214 SCTP_TCB_SEND_LOCK(stcb);
7217 /* Whack down the size */
7218 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7219 if ((stcb->sctp_socket != NULL) &&
7220 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7221 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7222 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7225 sctp_m_freem(sp->data);
7227 sp->tail_mbuf = NULL;
7236 some_taken = sp->some_taken;
7238 length = sp->length;
7239 if (sp->msg_is_complete) {
7240 /* The message is complete */
7241 to_move = min(length, frag_point);
7242 if (to_move == length) {
7243 /* All of it fits in the MTU */
7244 if (sp->some_taken) {
7245 rcv_flags |= SCTP_DATA_LAST_FRAG;
7247 rcv_flags |= SCTP_DATA_NOT_FRAG;
7249 sp->put_last_out = 1;
7250 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7251 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7254 /* Not all of it fits, we fragment */
7255 if (sp->some_taken == 0) {
7256 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7261 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7264 * We use a snapshot of length in case it
7265 * is expanding during the compare.
7270 if (to_move >= llen) {
7272 if (send_lock_up == 0) {
7274 * We are taking all of an incomplete msg
7275 * thus we need a send lock.
7277 SCTP_TCB_SEND_LOCK(stcb);
7279 if (sp->msg_is_complete) {
7281 * the sender finished the
7288 if (sp->some_taken == 0) {
7289 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7293 /* Nothing to take. */
7300 /* If we reach here, we can copy out a chunk */
7301 sctp_alloc_a_chunk(stcb, chk);
7303 /* No chunk memory */
7309 * Setup for unordered if needed by looking at the user sent info
7312 if (sp->sinfo_flags & SCTP_UNORDERED) {
7313 rcv_flags |= SCTP_DATA_UNORDERED;
7315 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7316 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7317 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7319 /* clear out the chunk before setting up */
7320 memset(chk, 0, sizeof(*chk));
7321 chk->rec.data.rcv_flags = rcv_flags;
7323 if (to_move >= length) {
7324 /* we think we can steal the whole thing */
7325 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7326 SCTP_TCB_SEND_LOCK(stcb);
7329 if (to_move < sp->length) {
7330 /* bail, it changed */
7333 chk->data = sp->data;
7334 chk->last_mbuf = sp->tail_mbuf;
7335 /* register the stealing */
7336 sp->data = sp->tail_mbuf = NULL;
7341 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7342 chk->last_mbuf = NULL;
7343 if (chk->data == NULL) {
7344 sp->some_taken = some_taken;
7345 sctp_free_a_chunk(stcb, chk, so_locked);
7350 #ifdef SCTP_MBUF_LOGGING
7351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7352 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7355 /* Pull off the data */
7356 m_adj(sp->data, to_move);
7357 /* Now lets work our way down and compact it */
7359 while (m && (SCTP_BUF_LEN(m) == 0)) {
7360 sp->data = SCTP_BUF_NEXT(m);
7361 SCTP_BUF_NEXT(m) = NULL;
7362 if (sp->tail_mbuf == m) {
7364 * Freeing tail? TSNH since
7365 * we supposedly were taking less
7366 * than the sp->length.
7369 panic("Huh, freing tail? - TSNH");
7371 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7372 sp->tail_mbuf = sp->data = NULL;
7380 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7381 chk->copy_by_ref = 1;
7383 chk->copy_by_ref = 0;
7386 * get last_mbuf and counts of mb usage This is ugly but hopefully
7387 * its only one mbuf.
7389 if (chk->last_mbuf == NULL) {
7390 chk->last_mbuf = chk->data;
7391 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7392 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7396 if (to_move > length) {
7397 /*- This should not happen either
7398 * since we always lower to_move to the size
7399 * of sp->length if its larger.
7402 panic("Huh, how can to_move be larger?");
7404 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7408 atomic_subtract_int(&sp->length, to_move);
7410 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7411 if (M_LEADINGSPACE(chk->data) < leading) {
7412 /* Not enough room for a chunk header, get some */
7415 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7418 * we're in trouble here. _PREPEND below will free
7419 * all the data if there is no leading space, so we
7420 * must put the data back and restore.
7422 if (send_lock_up == 0) {
7423 SCTP_TCB_SEND_LOCK(stcb);
7426 if (sp->data == NULL) {
7427 /* unsteal the data */
7428 sp->data = chk->data;
7429 sp->tail_mbuf = chk->last_mbuf;
7433 /* reassemble the data */
7435 sp->data = chk->data;
7436 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7438 sp->some_taken = some_taken;
7439 atomic_add_int(&sp->length, to_move);
7442 sctp_free_a_chunk(stcb, chk, so_locked);
7446 SCTP_BUF_LEN(m) = 0;
7447 SCTP_BUF_NEXT(m) = chk->data;
7449 M_ALIGN(chk->data, 4);
7452 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7453 if (chk->data == NULL) {
7454 /* HELP, TSNH since we assured it would not above? */
7456 panic("prepend failes HELP?");
7458 SCTP_PRINTF("prepend fails HELP?\n");
7459 sctp_free_a_chunk(stcb, chk, so_locked);
7465 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7466 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7467 chk->book_size_scale = 0;
7468 chk->sent = SCTP_DATAGRAM_UNSENT;
7471 chk->asoc = &stcb->asoc;
7472 chk->pad_inplace = 0;
7473 chk->no_fr_allowed = 0;
7474 if (stcb->asoc.idata_supported == 0) {
7475 if (rcv_flags & SCTP_DATA_UNORDERED) {
7476 /* Just use 0. The receiver ignores the values. */
7477 chk->rec.data.mid = 0;
7479 chk->rec.data.mid = strq->next_mid_ordered;
7480 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7481 strq->next_mid_ordered++;
7485 if (rcv_flags & SCTP_DATA_UNORDERED) {
7486 chk->rec.data.mid = strq->next_mid_unordered;
7487 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7488 strq->next_mid_unordered++;
7491 chk->rec.data.mid = strq->next_mid_ordered;
7492 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7493 strq->next_mid_ordered++;
7497 chk->rec.data.sid = sp->sid;
7498 chk->rec.data.ppid = sp->ppid;
7499 chk->rec.data.context = sp->context;
7500 chk->rec.data.doing_fast_retransmit = 0;
7502 chk->rec.data.timetodrop = sp->ts;
7503 chk->flags = sp->act_flags;
7506 chk->whoTo = sp->net;
7507 atomic_add_int(&chk->whoTo->ref_count, 1);
7511 if (sp->holds_key_ref) {
7512 chk->auth_keyid = sp->auth_keyid;
7513 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7514 chk->holds_key_ref = 1;
7516 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7517 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7518 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7519 (uint32_t)(uintptr_t)stcb, sp->length,
7520 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7523 if (stcb->asoc.idata_supported == 0) {
7524 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7526 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7529 * Put the rest of the things in place now. Size was done earlier in
7530 * previous loop prior to padding.
7533 #ifdef SCTP_ASOCLOG_OF_TSNS
7534 SCTP_TCB_LOCK_ASSERT(stcb);
7535 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7536 asoc->tsn_out_at = 0;
7537 asoc->tsn_out_wrapped = 1;
7539 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7540 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7541 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7542 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7543 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7544 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7545 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7546 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7549 if (stcb->asoc.idata_supported == 0) {
7550 dchkh->ch.chunk_type = SCTP_DATA;
7551 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7552 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7553 dchkh->dp.sid = htons(strq->sid);
7554 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7555 dchkh->dp.ppid = chk->rec.data.ppid;
7556 dchkh->ch.chunk_length = htons(chk->send_size);
7558 ndchkh->ch.chunk_type = SCTP_IDATA;
7559 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7560 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7561 ndchkh->dp.sid = htons(strq->sid);
7562 ndchkh->dp.reserved = htons(0);
7563 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7565 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7567 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7569 ndchkh->ch.chunk_length = htons(chk->send_size);
7571 /* Now advance the chk->send_size by the actual pad needed. */
7572 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7577 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7578 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7580 chk->last_mbuf = lm;
7581 chk->pad_inplace = 1;
7583 chk->send_size += pads;
7585 if (PR_SCTP_ENABLED(chk->flags)) {
7586 asoc->pr_sctp_cnt++;
7588 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7589 /* All done pull and kill the message */
7590 if (sp->put_last_out == 0) {
7591 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7592 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7593 sp->sender_all_done,
7595 sp->msg_is_complete,
7599 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7600 SCTP_TCB_SEND_LOCK(stcb);
7603 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7604 TAILQ_REMOVE(&strq->outqueue, sp, next);
7605 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7606 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7607 (strq->chunks_on_queues == 0) &&
7608 TAILQ_EMPTY(&strq->outqueue)) {
7609 stcb->asoc.trigger_reset = 1;
7612 sctp_free_remote_addr(sp->net);
7616 sctp_m_freem(sp->data);
7619 sctp_free_a_strmoq(stcb, sp, so_locked);
7621 asoc->chunks_on_out_queue++;
7622 strq->chunks_on_queues++;
7623 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7624 asoc->send_queue_cnt++;
7627 SCTP_TCB_SEND_UNLOCK(stcb);
7633 sctp_fill_outqueue(struct sctp_tcb *stcb,
7634 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked)
7636 struct sctp_association *asoc;
7637 struct sctp_stream_out *strq;
7638 uint32_t space_left, moved, total_moved;
7641 SCTP_TCB_LOCK_ASSERT(stcb);
7644 switch (net->ro._l_addr.sa.sa_family) {
7647 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7652 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7657 space_left = net->mtu;
7660 /* Need an allowance for the data chunk header too */
7661 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7663 /* must make even word boundary */
7664 space_left &= 0xfffffffc;
7665 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7668 while ((space_left > 0) && (strq != NULL)) {
7669 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7670 &giveup, eeor_mode, &bail, so_locked);
7671 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7672 if ((giveup != 0) || (bail != 0)) {
7675 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7676 total_moved += moved;
7677 if (space_left >= moved) {
7678 space_left -= moved;
7682 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7683 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7687 space_left &= 0xfffffffc;
7692 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7694 if (total_moved == 0) {
7695 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7696 (net == stcb->asoc.primary_destination)) {
7697 /* ran dry for primary network net */
7698 SCTP_STAT_INCR(sctps_primary_randry);
7699 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7700 /* ran dry with CMT on */
7701 SCTP_STAT_INCR(sctps_cmt_randry);
7707 sctp_fix_ecn_echo(struct sctp_association *asoc)
7709 struct sctp_tmit_chunk *chk;
7711 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7712 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7713 chk->sent = SCTP_DATAGRAM_UNSENT;
7719 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7721 struct sctp_association *asoc;
7722 struct sctp_tmit_chunk *chk;
7723 struct sctp_stream_queue_pending *sp;
7730 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7731 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7732 if (sp->net == net) {
7733 sctp_free_remote_addr(sp->net);
7738 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7739 if (chk->whoTo == net) {
7740 sctp_free_remote_addr(chk->whoTo);
7747 sctp_med_chunk_output(struct sctp_inpcb *inp,
7748 struct sctp_tcb *stcb,
7749 struct sctp_association *asoc,
7752 int control_only, int from_where,
7753 struct timeval *now, int *now_filled, int frag_point, int so_locked)
7756 * Ok this is the generic chunk service queue. we must do the
7758 * - Service the stream queue that is next, moving any
7759 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7760 * LAST to the out queue in one pass) and assigning TSN's. This
7761 * only applys though if the peer does not support NDATA. For NDATA
7762 * chunks its ok to not send the entire message ;-)
7763 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7764 * fomulate and send the low level chunks. Making sure to combine
7765 * any control in the control chunk queue also.
7767 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7768 struct mbuf *outchain, *endoutchain;
7769 struct sctp_tmit_chunk *chk, *nchk;
7771 /* temp arrays for unlinking */
7772 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7773 int no_fragmentflg, error;
7774 unsigned int max_rwnd_per_dest, max_send_per_dest;
7775 int one_chunk, hbflag, skip_data_for_this_net;
7776 int asconf, cookie, no_out_cnt;
7777 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7778 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7780 uint32_t auth_offset;
7781 struct sctp_auth_chunk *auth;
7782 uint16_t auth_keyid;
7783 int override_ok = 1;
7784 int skip_fill_up = 0;
7785 int data_auth_reqd = 0;
7788 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7795 auth_keyid = stcb->asoc.authinfo.active_keyid;
7796 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7797 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7798 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7803 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7805 * First lets prime the pump. For each destination, if there is room
7806 * in the flight size, attempt to pull an MTU's worth out of the
7807 * stream queues into the general send_queue
7809 #ifdef SCTP_AUDITING_ENABLED
7810 sctp_audit_log(0xC2, 2);
7812 SCTP_TCB_LOCK_ASSERT(stcb);
7819 /* Nothing to possible to send? */
7820 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7821 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7822 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7823 TAILQ_EMPTY(&asoc->send_queue) &&
7824 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7829 if (asoc->peers_rwnd == 0) {
7830 /* No room in peers rwnd */
7832 if (asoc->total_flight > 0) {
7833 /* we are allowed one chunk in flight */
7837 if (stcb->asoc.ecn_echo_cnt_onq) {
7838 /* Record where a sack goes, if any */
7839 if (no_data_chunks &&
7840 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7841 /* Nothing but ECNe to send - we don't do that */
7842 goto nothing_to_send;
7844 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7845 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7846 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7847 sack_goes_to = chk->whoTo;
7852 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7853 if (stcb->sctp_socket)
7854 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7856 max_send_per_dest = 0;
7857 if (no_data_chunks == 0) {
7858 /* How many non-directed chunks are there? */
7859 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7860 if (chk->whoTo == NULL) {
7862 * We already have non-directed chunks on
7863 * the queue, no need to do a fill-up.
7870 if ((no_data_chunks == 0) &&
7871 (skip_fill_up == 0) &&
7872 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7873 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7875 * This for loop we are in takes in each net, if
7876 * its's got space in cwnd and has data sent to it
7877 * (when CMT is off) then it calls
7878 * sctp_fill_outqueue for the net. This gets data on
7879 * the send queue for that network.
7881 * In sctp_fill_outqueue TSN's are assigned and data
7882 * is copied out of the stream buffers. Note mostly
7883 * copy by reference (we hope).
7885 net->window_probe = 0;
7886 if ((net != stcb->asoc.alternate) &&
7887 ((net->dest_state & SCTP_ADDR_PF) ||
7888 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7889 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7890 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7891 sctp_log_cwnd(stcb, net, 1,
7892 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7896 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7897 (net->flight_size == 0)) {
7898 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7900 if (net->flight_size >= net->cwnd) {
7901 /* skip this network, no room - can't fill */
7902 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7903 sctp_log_cwnd(stcb, net, 3,
7904 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7908 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7909 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7911 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7913 /* memory alloc failure */
7919 /* now service each destination and send out what we can for it */
7920 /* Nothing to send? */
7921 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7922 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7923 TAILQ_EMPTY(&asoc->send_queue)) {
7928 if (asoc->sctp_cmt_on_off > 0) {
7929 /* get the last start point */
7930 start_at = asoc->last_net_cmt_send_started;
7931 if (start_at == NULL) {
7932 /* null so to beginning */
7933 start_at = TAILQ_FIRST(&asoc->nets);
7935 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7936 if (start_at == NULL) {
7937 start_at = TAILQ_FIRST(&asoc->nets);
7940 asoc->last_net_cmt_send_started = start_at;
7942 start_at = TAILQ_FIRST(&asoc->nets);
7944 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7945 if (chk->whoTo == NULL) {
7946 if (asoc->alternate) {
7947 chk->whoTo = asoc->alternate;
7949 chk->whoTo = asoc->primary_destination;
7951 atomic_add_int(&chk->whoTo->ref_count, 1);
7954 old_start_at = NULL;
7955 again_one_more_time:
7956 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7957 /* how much can we send? */
7958 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7959 if (old_start_at && (old_start_at == net)) {
7960 /* through list ocmpletely. */
7964 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7965 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7966 (net->flight_size >= net->cwnd)) {
7968 * Nothing on control or asconf and flight is full,
7969 * we can skip even in the CMT case.
7974 endoutchain = outchain = NULL;
7979 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7980 skip_data_for_this_net = 1;
7982 skip_data_for_this_net = 0;
7984 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7987 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7992 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8002 if (mtu > asoc->peers_rwnd) {
8003 if (asoc->total_flight > 0) {
8004 /* We have a packet in flight somewhere */
8005 r_mtu = asoc->peers_rwnd;
8007 /* We are always allowed to send one MTU out */
8015 /************************/
8016 /* ASCONF transmission */
8017 /************************/
8018 /* Now first lets go through the asconf queue */
8019 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8020 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8023 if (chk->whoTo == NULL) {
8024 if (asoc->alternate == NULL) {
8025 if (asoc->primary_destination != net) {
8029 if (asoc->alternate != net) {
8034 if (chk->whoTo != net) {
8038 if (chk->data == NULL) {
8041 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8042 chk->sent != SCTP_DATAGRAM_RESEND) {
8046 * if no AUTH is yet included and this chunk
8047 * requires it, make sure to account for it. We
8048 * don't apply the size until the AUTH chunk is
8049 * actually added below in case there is no room for
8050 * this chunk. NOTE: we overload the use of "omtu"
8053 if ((auth == NULL) &&
8054 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8055 stcb->asoc.peer_auth_chunks)) {
8056 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8059 /* Here we do NOT factor the r_mtu */
8060 if ((chk->send_size < (int)(mtu - omtu)) ||
8061 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8063 * We probably should glom the mbuf chain
8064 * from the chk->data for control but the
8065 * problem is it becomes yet one more level
8066 * of tracking to do if for some reason
8067 * output fails. Then I have got to
8068 * reconstruct the merged control chain.. el
8069 * yucko.. for now we take the easy way and
8073 * Add an AUTH chunk, if chunk requires it
8074 * save the offset into the chain for AUTH
8076 if ((auth == NULL) &&
8077 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8078 stcb->asoc.peer_auth_chunks))) {
8079 outchain = sctp_add_auth_chunk(outchain,
8084 chk->rec.chunk_id.id);
8085 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8087 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8088 (int)chk->rec.chunk_id.can_take_data,
8089 chk->send_size, chk->copy_by_ref);
8090 if (outchain == NULL) {
8092 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8095 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8096 /* update our MTU size */
8097 if (mtu > (chk->send_size + omtu))
8098 mtu -= (chk->send_size + omtu);
8101 to_out += (chk->send_size + omtu);
8102 /* Do clear IP_DF ? */
8103 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8106 if (chk->rec.chunk_id.can_take_data)
8109 * set hb flag since we can use these for
8115 * should sysctl this: don't bundle data
8116 * with ASCONF since it requires AUTH
8119 chk->sent = SCTP_DATAGRAM_SENT;
8120 if (chk->whoTo == NULL) {
8122 atomic_add_int(&net->ref_count, 1);
8127 * Ok we are out of room but we can
8128 * output without effecting the
8129 * flight size since this little guy
8130 * is a control only packet.
8132 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8134 * do NOT clear the asconf flag as
8135 * it is used to do appropriate
8136 * source address selection.
8138 if (*now_filled == 0) {
8139 (void)SCTP_GETTIME_TIMEVAL(now);
8142 net->last_sent_time = *now;
8144 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8145 (struct sockaddr *)&net->ro._l_addr,
8146 outchain, auth_offset, auth,
8147 stcb->asoc.authinfo.active_keyid,
8148 no_fragmentflg, 0, asconf,
8149 inp->sctp_lport, stcb->rport,
8150 htonl(stcb->asoc.peer_vtag),
8155 * error, we could not
8158 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8159 if (from_where == 0) {
8160 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8162 if (error == ENOBUFS) {
8163 asoc->ifp_had_enobuf = 1;
8164 SCTP_STAT_INCR(sctps_lowlevelerr);
8166 /* error, could not output */
8167 if (error == EHOSTUNREACH) {
8173 sctp_move_chunks_from_net(stcb, net);
8178 asoc->ifp_had_enobuf = 0;
8181 * increase the number we sent, if a
8182 * cookie is sent we don't tell them
8185 outchain = endoutchain = NULL;
8189 *num_out += ctl_cnt;
8190 /* recalc a clean slate and setup */
8191 switch (net->ro._l_addr.sa.sa_family) {
8194 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8199 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8216 /************************/
8217 /* Control transmission */
8218 /************************/
8219 /* Now first lets go through the control queue */
8220 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8221 if ((sack_goes_to) &&
8222 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8223 (chk->whoTo != sack_goes_to)) {
8225 * if we have a sack in queue, and we are
8226 * looking at an ecn echo that is NOT queued
8227 * to where the sack is going..
8229 if (chk->whoTo == net) {
8231 * Don't transmit it to where its
8232 * going (current net)
8235 } else if (sack_goes_to == net) {
8237 * But do transmit it to this
8240 goto skip_net_check;
8243 if (chk->whoTo == NULL) {
8244 if (asoc->alternate == NULL) {
8245 if (asoc->primary_destination != net) {
8249 if (asoc->alternate != net) {
8254 if (chk->whoTo != net) {
8259 if (chk->data == NULL) {
8262 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8264 * It must be unsent. Cookies and ASCONF's
8265 * hang around but there timers will force
8266 * when marked for resend.
8271 * if no AUTH is yet included and this chunk
8272 * requires it, make sure to account for it. We
8273 * don't apply the size until the AUTH chunk is
8274 * actually added below in case there is no room for
8275 * this chunk. NOTE: we overload the use of "omtu"
8278 if ((auth == NULL) &&
8279 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8280 stcb->asoc.peer_auth_chunks)) {
8281 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8284 /* Here we do NOT factor the r_mtu */
8285 if ((chk->send_size <= (int)(mtu - omtu)) ||
8286 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8288 * We probably should glom the mbuf chain
8289 * from the chk->data for control but the
8290 * problem is it becomes yet one more level
8291 * of tracking to do if for some reason
8292 * output fails. Then I have got to
8293 * reconstruct the merged control chain.. el
8294 * yucko.. for now we take the easy way and
8298 * Add an AUTH chunk, if chunk requires it
8299 * save the offset into the chain for AUTH
8301 if ((auth == NULL) &&
8302 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8303 stcb->asoc.peer_auth_chunks))) {
8304 outchain = sctp_add_auth_chunk(outchain,
8309 chk->rec.chunk_id.id);
8310 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8312 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8313 (int)chk->rec.chunk_id.can_take_data,
8314 chk->send_size, chk->copy_by_ref);
8315 if (outchain == NULL) {
8317 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8320 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8321 /* update our MTU size */
8322 if (mtu > (chk->send_size + omtu))
8323 mtu -= (chk->send_size + omtu);
8326 to_out += (chk->send_size + omtu);
8327 /* Do clear IP_DF ? */
8328 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8331 if (chk->rec.chunk_id.can_take_data)
8333 /* Mark things to be removed, if needed */
8334 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8335 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8336 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8337 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8338 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8339 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8340 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8341 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8342 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8343 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8344 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8345 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8348 /* remove these chunks at the end */
8349 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8350 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8351 /* turn off the timer */
8352 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8353 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8355 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8361 * Other chunks, since they have
8362 * timers running (i.e. COOKIE) we
8363 * just "trust" that it gets sent or
8367 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8370 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8372 * Increment ecne send count
8373 * here this means we may be
8374 * over-zealous in our
8375 * counting if the send
8376 * fails, but its the best
8377 * place to do it (we used
8378 * to do it in the queue of
8379 * the chunk, but that did
8380 * not tell how many times
8383 SCTP_STAT_INCR(sctps_sendecne);
8385 chk->sent = SCTP_DATAGRAM_SENT;
8386 if (chk->whoTo == NULL) {
8388 atomic_add_int(&net->ref_count, 1);
8394 * Ok we are out of room but we can
8395 * output without effecting the
8396 * flight size since this little guy
8397 * is a control only packet.
8400 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8402 * do NOT clear the asconf
8403 * flag as it is used to do
8404 * appropriate source
8405 * address selection.
8409 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8412 /* Only HB or ASCONF advances time */
8414 if (*now_filled == 0) {
8415 (void)SCTP_GETTIME_TIMEVAL(now);
8418 net->last_sent_time = *now;
8421 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8422 (struct sockaddr *)&net->ro._l_addr,
8425 stcb->asoc.authinfo.active_keyid,
8426 no_fragmentflg, 0, asconf,
8427 inp->sctp_lport, stcb->rport,
8428 htonl(stcb->asoc.peer_vtag),
8433 * error, we could not
8436 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8437 if (from_where == 0) {
8438 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8440 if (error == ENOBUFS) {
8441 asoc->ifp_had_enobuf = 1;
8442 SCTP_STAT_INCR(sctps_lowlevelerr);
8444 if (error == EHOSTUNREACH) {
8450 sctp_move_chunks_from_net(stcb, net);
8455 asoc->ifp_had_enobuf = 0;
8458 * increase the number we sent, if a
8459 * cookie is sent we don't tell them
8462 outchain = endoutchain = NULL;
8466 *num_out += ctl_cnt;
8467 /* recalc a clean slate and setup */
8468 switch (net->ro._l_addr.sa.sa_family) {
8471 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8476 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8493 /* JRI: if dest is in PF state, do not send data to it */
8494 if ((asoc->sctp_cmt_on_off > 0) &&
8495 (net != stcb->asoc.alternate) &&
8496 (net->dest_state & SCTP_ADDR_PF)) {
8499 if (net->flight_size >= net->cwnd) {
8502 if ((asoc->sctp_cmt_on_off > 0) &&
8503 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8504 (net->flight_size > max_rwnd_per_dest)) {
8508 * We need a specific accounting for the usage of the send
8509 * buffer. We also need to check the number of messages per
8510 * net. For now, this is better than nothing and it disabled
8513 if ((asoc->sctp_cmt_on_off > 0) &&
8514 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8515 (max_send_per_dest > 0) &&
8516 (net->flight_size > max_send_per_dest)) {
8519 /*********************/
8520 /* Data transmission */
8521 /*********************/
8523 * if AUTH for DATA is required and no AUTH has been added
8524 * yet, account for this in the mtu now... if no data can be
8525 * bundled, this adjustment won't matter anyways since the
8526 * packet will be going out...
8528 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8529 stcb->asoc.peer_auth_chunks);
8530 if (data_auth_reqd && (auth == NULL)) {
8531 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8533 /* now lets add any data within the MTU constraints */
8534 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8537 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8538 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8545 if (net->mtu > SCTP_MIN_OVERHEAD)
8546 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8556 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8557 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8558 (skip_data_for_this_net == 0)) ||
8560 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8561 if (no_data_chunks) {
8562 /* let only control go out */
8566 if (net->flight_size >= net->cwnd) {
8567 /* skip this net, no room for data */
8571 if ((chk->whoTo != NULL) &&
8572 (chk->whoTo != net)) {
8573 /* Don't send the chunk on this net */
8577 if (asoc->sctp_cmt_on_off == 0) {
8578 if ((asoc->alternate) &&
8579 (asoc->alternate != net) &&
8580 (chk->whoTo == NULL)) {
8582 } else if ((net != asoc->primary_destination) &&
8583 (asoc->alternate == NULL) &&
8584 (chk->whoTo == NULL)) {
8588 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8590 * strange, we have a chunk that is
8591 * to big for its destination and
8592 * yet no fragment ok flag.
8593 * Something went wrong when the
8594 * PMTU changed...we did not mark
8595 * this chunk for some reason?? I
8596 * will fix it here by letting IP
8597 * fragment it for now and printing
8598 * a warning. This really should not
8601 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8602 chk->send_size, mtu);
8603 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8605 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8606 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8607 struct sctp_data_chunk *dchkh;
8609 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8610 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8612 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8613 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8614 /* ok we will add this one */
8617 * Add an AUTH chunk, if chunk
8618 * requires it, save the offset into
8619 * the chain for AUTH
8621 if (data_auth_reqd) {
8623 outchain = sctp_add_auth_chunk(outchain,
8629 auth_keyid = chk->auth_keyid;
8631 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8632 } else if (override_ok) {
8637 auth_keyid = chk->auth_keyid;
8639 } else if (auth_keyid != chk->auth_keyid) {
8647 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8648 chk->send_size, chk->copy_by_ref);
8649 if (outchain == NULL) {
8650 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8651 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8652 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8655 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8658 /* upate our MTU size */
8659 /* Do clear IP_DF ? */
8660 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8663 /* unsigned subtraction of mtu */
8664 if (mtu > chk->send_size)
8665 mtu -= chk->send_size;
8668 /* unsigned subtraction of r_mtu */
8669 if (r_mtu > chk->send_size)
8670 r_mtu -= chk->send_size;
8674 to_out += chk->send_size;
8675 if ((to_out > mx_mtu) && no_fragmentflg) {
8677 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8679 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8683 chk->window_probe = 0;
8684 data_list[bundle_at++] = chk;
8685 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8688 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8689 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8690 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8692 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8694 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8695 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8705 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8707 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8708 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8709 data_list[0]->window_probe = 1;
8710 net->window_probe = 1;
8716 * Must be sent in order of the
8717 * TSN's (on a network)
8721 } /* for (chunk gather loop for this net) */
8722 } /* if asoc.state OPEN */
8724 /* Is there something to send for this destination? */
8726 /* We may need to start a control timer or two */
8728 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8731 * do NOT clear the asconf flag as it is
8732 * used to do appropriate source address
8737 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8740 /* must start a send timer if data is being sent */
8741 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8743 * no timer running on this destination
8746 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8748 if (bundle_at || hbflag) {
8749 /* For data/asconf and hb set time */
8750 if (*now_filled == 0) {
8751 (void)SCTP_GETTIME_TIMEVAL(now);
8754 net->last_sent_time = *now;
8756 /* Now send it, if there is anything to send :> */
8757 if ((error = sctp_lowlevel_chunk_output(inp,
8760 (struct sockaddr *)&net->ro._l_addr,
8768 inp->sctp_lport, stcb->rport,
8769 htonl(stcb->asoc.peer_vtag),
8773 /* error, we could not output */
8774 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8775 if (from_where == 0) {
8776 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8778 if (error == ENOBUFS) {
8779 asoc->ifp_had_enobuf = 1;
8780 SCTP_STAT_INCR(sctps_lowlevelerr);
8782 if (error == EHOSTUNREACH) {
8784 * Destination went unreachable
8787 sctp_move_chunks_from_net(stcb, net);
8791 * I add this line to be paranoid. As far as
8792 * I can tell the continue, takes us back to
8793 * the top of the for, but just to make sure
8794 * I will reset these again here.
8796 ctl_cnt = bundle_at = 0;
8797 continue; /* This takes us back to the
8798 * for() for the nets. */
8800 asoc->ifp_had_enobuf = 0;
8806 *num_out += (ctl_cnt + bundle_at);
8809 /* setup for a RTO measurement */
8810 tsns_sent = data_list[0]->rec.data.tsn;
8811 /* fill time if not already filled */
8812 if (*now_filled == 0) {
8813 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8815 *now = asoc->time_last_sent;
8817 asoc->time_last_sent = *now;
8819 if (net->rto_needed) {
8820 data_list[0]->do_rtt = 1;
8821 net->rto_needed = 0;
8823 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8824 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8830 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8831 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8834 if (old_start_at == NULL) {
8835 old_start_at = start_at;
8836 start_at = TAILQ_FIRST(&asoc->nets);
8838 goto again_one_more_time;
8842 * At the end there should be no NON timed chunks hanging on this
8845 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8846 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8848 if ((*num_out == 0) && (*reason_code == 0)) {
8853 sctp_clean_up_ctl(stcb, asoc, so_locked);
8858 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8861 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8862 * the control chunk queue.
8864 struct sctp_chunkhdr *hdr;
8865 struct sctp_tmit_chunk *chk;
8866 struct mbuf *mat, *last_mbuf;
8867 uint32_t chunk_length;
8868 uint16_t padding_length;
8870 SCTP_TCB_LOCK_ASSERT(stcb);
8871 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8872 if (op_err == NULL) {
8877 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8878 chunk_length += SCTP_BUF_LEN(mat);
8879 if (SCTP_BUF_NEXT(mat) == NULL) {
8883 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8884 sctp_m_freem(op_err);
8887 padding_length = chunk_length % 4;
8888 if (padding_length != 0) {
8889 padding_length = 4 - padding_length;
8891 if (padding_length != 0) {
8892 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8893 sctp_m_freem(op_err);
8897 sctp_alloc_a_chunk(stcb, chk);
8900 sctp_m_freem(op_err);
8903 chk->copy_by_ref = 0;
8904 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8905 chk->rec.chunk_id.can_take_data = 0;
8907 chk->send_size = (uint16_t)chunk_length;
8908 chk->sent = SCTP_DATAGRAM_UNSENT;
8910 chk->asoc = &stcb->asoc;
8913 hdr = mtod(op_err, struct sctp_chunkhdr *);
8914 hdr->chunk_type = SCTP_OPERATION_ERROR;
8915 hdr->chunk_flags = 0;
8916 hdr->chunk_length = htons(chk->send_size);
8917 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8918 chk->asoc->ctrl_queue_cnt++;
8922 sctp_send_cookie_echo(struct mbuf *m,
8923 int offset, int limit,
8924 struct sctp_tcb *stcb,
8925 struct sctp_nets *net)
8928 * pull out the cookie and put it at the front of the control chunk
8932 struct mbuf *cookie;
8933 struct sctp_paramhdr param, *phdr;
8934 struct sctp_chunkhdr *hdr;
8935 struct sctp_tmit_chunk *chk;
8936 uint16_t ptype, plen;
8938 SCTP_TCB_LOCK_ASSERT(stcb);
8939 /* First find the cookie in the param area */
8941 at = offset + sizeof(struct sctp_init_chunk);
8943 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8947 ptype = ntohs(phdr->param_type);
8948 plen = ntohs(phdr->param_length);
8949 if (plen < sizeof(struct sctp_paramhdr)) {
8952 if (ptype == SCTP_STATE_COOKIE) {
8955 /* found the cookie */
8956 if (at + plen > limit) {
8959 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8960 if (cookie == NULL) {
8964 if ((pad = (plen % 4)) > 0) {
8968 if (sctp_pad_lastmbuf(cookie, pad, NULL) == NULL) {
8972 #ifdef SCTP_MBUF_LOGGING
8973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8974 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
8979 at += SCTP_SIZE32(plen);
8981 /* ok, we got the cookie lets change it into a cookie echo chunk */
8982 /* first the change from param to cookie */
8983 hdr = mtod(cookie, struct sctp_chunkhdr *);
8984 hdr->chunk_type = SCTP_COOKIE_ECHO;
8985 hdr->chunk_flags = 0;
8986 /* get the chunk stuff now and place it in the FRONT of the queue */
8987 sctp_alloc_a_chunk(stcb, chk);
8990 sctp_m_freem(cookie);
8993 chk->copy_by_ref = 0;
8994 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8995 chk->rec.chunk_id.can_take_data = 0;
8996 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8997 chk->send_size = SCTP_SIZE32(plen);
8998 chk->sent = SCTP_DATAGRAM_UNSENT;
9000 chk->asoc = &stcb->asoc;
9003 atomic_add_int(&chk->whoTo->ref_count, 1);
9004 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9005 chk->asoc->ctrl_queue_cnt++;
9010 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9014 struct sctp_nets *net)
9017 * take a HB request and make it into a HB ack and send it.
9019 struct mbuf *outchain;
9020 struct sctp_chunkhdr *chdr;
9021 struct sctp_tmit_chunk *chk;
9024 /* must have a net pointer */
9027 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9028 if (outchain == NULL) {
9029 /* gak out of memory */
9032 #ifdef SCTP_MBUF_LOGGING
9033 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9034 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9037 chdr = mtod(outchain, struct sctp_chunkhdr *);
9038 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9039 chdr->chunk_flags = 0;
9040 if (chk_length % 4 != 0) {
9041 sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
9043 sctp_alloc_a_chunk(stcb, chk);
9046 sctp_m_freem(outchain);
9049 chk->copy_by_ref = 0;
9050 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9051 chk->rec.chunk_id.can_take_data = 1;
9053 chk->send_size = chk_length;
9054 chk->sent = SCTP_DATAGRAM_UNSENT;
9056 chk->asoc = &stcb->asoc;
9057 chk->data = outchain;
9059 atomic_add_int(&chk->whoTo->ref_count, 1);
9060 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9061 chk->asoc->ctrl_queue_cnt++;
9065 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9067 /* formulate and queue a cookie-ack back to sender */
9068 struct mbuf *cookie_ack;
9069 struct sctp_chunkhdr *hdr;
9070 struct sctp_tmit_chunk *chk;
9072 SCTP_TCB_LOCK_ASSERT(stcb);
9074 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9075 if (cookie_ack == NULL) {
9079 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9080 sctp_alloc_a_chunk(stcb, chk);
9083 sctp_m_freem(cookie_ack);
9086 chk->copy_by_ref = 0;
9087 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9088 chk->rec.chunk_id.can_take_data = 1;
9090 chk->send_size = sizeof(struct sctp_chunkhdr);
9091 chk->sent = SCTP_DATAGRAM_UNSENT;
9093 chk->asoc = &stcb->asoc;
9094 chk->data = cookie_ack;
9095 if (chk->asoc->last_control_chunk_from != NULL) {
9096 chk->whoTo = chk->asoc->last_control_chunk_from;
9097 atomic_add_int(&chk->whoTo->ref_count, 1);
9101 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9102 hdr->chunk_type = SCTP_COOKIE_ACK;
9103 hdr->chunk_flags = 0;
9104 hdr->chunk_length = htons(chk->send_size);
9105 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9106 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9107 chk->asoc->ctrl_queue_cnt++;
9112 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9114 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9115 struct mbuf *m_shutdown_ack;
9116 struct sctp_shutdown_ack_chunk *ack_cp;
9117 struct sctp_tmit_chunk *chk;
9119 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9120 if (m_shutdown_ack == NULL) {
9124 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9125 sctp_alloc_a_chunk(stcb, chk);
9128 sctp_m_freem(m_shutdown_ack);
9131 chk->copy_by_ref = 0;
9132 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9133 chk->rec.chunk_id.can_take_data = 1;
9135 chk->send_size = sizeof(struct sctp_chunkhdr);
9136 chk->sent = SCTP_DATAGRAM_UNSENT;
9138 chk->asoc = &stcb->asoc;
9139 chk->data = m_shutdown_ack;
9142 atomic_add_int(&chk->whoTo->ref_count, 1);
9144 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9145 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9146 ack_cp->ch.chunk_flags = 0;
9147 ack_cp->ch.chunk_length = htons(chk->send_size);
9148 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9149 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9150 chk->asoc->ctrl_queue_cnt++;
9155 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9157 /* formulate and queue a SHUTDOWN to the sender */
9158 struct mbuf *m_shutdown;
9159 struct sctp_shutdown_chunk *shutdown_cp;
9160 struct sctp_tmit_chunk *chk;
9162 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9163 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9164 /* We already have a SHUTDOWN queued. Reuse it. */
9166 sctp_free_remote_addr(chk->whoTo);
9173 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9174 if (m_shutdown == NULL) {
9178 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9179 sctp_alloc_a_chunk(stcb, chk);
9182 sctp_m_freem(m_shutdown);
9185 chk->copy_by_ref = 0;
9186 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9187 chk->rec.chunk_id.can_take_data = 1;
9189 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9190 chk->sent = SCTP_DATAGRAM_UNSENT;
9192 chk->asoc = &stcb->asoc;
9193 chk->data = m_shutdown;
9196 atomic_add_int(&chk->whoTo->ref_count, 1);
9198 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9199 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9200 shutdown_cp->ch.chunk_flags = 0;
9201 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9202 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9203 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9204 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9205 chk->asoc->ctrl_queue_cnt++;
9207 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9210 atomic_add_int(&chk->whoTo->ref_count, 1);
9212 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9213 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9214 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9220 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9223 * formulate and queue an ASCONF to the peer. ASCONF parameters
9224 * should be queued on the assoc queue.
9226 struct sctp_tmit_chunk *chk;
9227 struct mbuf *m_asconf;
9230 SCTP_TCB_LOCK_ASSERT(stcb);
9232 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9233 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9234 /* can't send a new one if there is one in flight already */
9238 /* compose an ASCONF chunk, maximum length is PMTU */
9239 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9240 if (m_asconf == NULL) {
9244 sctp_alloc_a_chunk(stcb, chk);
9247 sctp_m_freem(m_asconf);
9251 chk->copy_by_ref = 0;
9252 chk->rec.chunk_id.id = SCTP_ASCONF;
9253 chk->rec.chunk_id.can_take_data = 0;
9254 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9255 chk->data = m_asconf;
9256 chk->send_size = len;
9257 chk->sent = SCTP_DATAGRAM_UNSENT;
9259 chk->asoc = &stcb->asoc;
9262 atomic_add_int(&chk->whoTo->ref_count, 1);
9264 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9265 chk->asoc->ctrl_queue_cnt++;
9270 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9273 * formulate and queue a asconf-ack back to sender. the asconf-ack
9274 * must be stored in the tcb.
9276 struct sctp_tmit_chunk *chk;
9277 struct sctp_asconf_ack *ack, *latest_ack;
9279 struct sctp_nets *net = NULL;
9281 SCTP_TCB_LOCK_ASSERT(stcb);
9282 /* Get the latest ASCONF-ACK */
9283 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9284 if (latest_ack == NULL) {
9287 if (latest_ack->last_sent_to != NULL &&
9288 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9289 /* we're doing a retransmission */
9290 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9293 if (stcb->asoc.last_control_chunk_from == NULL) {
9294 if (stcb->asoc.alternate) {
9295 net = stcb->asoc.alternate;
9297 net = stcb->asoc.primary_destination;
9300 net = stcb->asoc.last_control_chunk_from;
9305 if (stcb->asoc.last_control_chunk_from == NULL) {
9306 if (stcb->asoc.alternate) {
9307 net = stcb->asoc.alternate;
9309 net = stcb->asoc.primary_destination;
9312 net = stcb->asoc.last_control_chunk_from;
9315 latest_ack->last_sent_to = net;
9317 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9318 if (ack->data == NULL) {
9322 /* copy the asconf_ack */
9323 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9324 if (m_ack == NULL) {
9325 /* couldn't copy it */
9328 #ifdef SCTP_MBUF_LOGGING
9329 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9330 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9334 sctp_alloc_a_chunk(stcb, chk);
9338 sctp_m_freem(m_ack);
9341 chk->copy_by_ref = 0;
9342 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9343 chk->rec.chunk_id.can_take_data = 1;
9344 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9347 atomic_add_int(&chk->whoTo->ref_count, 1);
9350 chk->send_size = ack->len;
9351 chk->sent = SCTP_DATAGRAM_UNSENT;
9353 chk->asoc = &stcb->asoc;
9355 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9356 chk->asoc->ctrl_queue_cnt++;
9362 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9363 struct sctp_tcb *stcb,
9364 struct sctp_association *asoc,
9365 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked)
9368 * send out one MTU of retransmission. If fast_retransmit is
9369 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9370 * rwnd. For a Cookie or Asconf in the control chunk queue we
9371 * retransmit them by themselves.
9373 * For data chunks we will pick out the lowest TSN's in the sent_queue
9374 * marked for resend and bundle them all together (up to a MTU of
9375 * destination). The address to send to should have been
9376 * selected/changed where the retransmission was marked (i.e. in FR
9377 * or t3-timeout routines).
9379 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9380 struct sctp_tmit_chunk *chk, *fwd;
9381 struct mbuf *m, *endofchain;
9382 struct sctp_nets *net = NULL;
9383 uint32_t tsns_sent = 0;
9384 int no_fragmentflg, bundle_at, cnt_thru;
9386 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9387 struct sctp_auth_chunk *auth = NULL;
9388 uint32_t auth_offset = 0;
9389 uint16_t auth_keyid;
9390 int override_ok = 1;
9391 int data_auth_reqd = 0;
9394 SCTP_TCB_LOCK_ASSERT(stcb);
9395 tmr_started = ctl_cnt = bundle_at = error = 0;
9400 endofchain = m = NULL;
9401 auth_keyid = stcb->asoc.authinfo.active_keyid;
9402 #ifdef SCTP_AUDITING_ENABLED
9403 sctp_audit_log(0xC3, 1);
9405 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9406 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9407 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9408 asoc->sent_queue_retran_cnt);
9409 asoc->sent_queue_cnt = 0;
9410 asoc->sent_queue_cnt_removeable = 0;
9411 /* send back 0/0 so we enter normal transmission */
9415 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9416 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9417 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9418 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9419 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9422 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9423 if (chk != asoc->str_reset) {
9425 * not eligible for retran if its
9432 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9436 * Add an AUTH chunk, if chunk requires it save the
9437 * offset into the chain for AUTH
9439 if ((auth == NULL) &&
9440 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9441 stcb->asoc.peer_auth_chunks))) {
9442 m = sctp_add_auth_chunk(m, &endofchain,
9443 &auth, &auth_offset,
9445 chk->rec.chunk_id.id);
9446 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9448 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9454 /* do we have control chunks to retransmit? */
9456 /* Start a timer no matter if we succeed or fail */
9457 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9458 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9459 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9460 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9461 chk->snd_count++; /* update our count */
9462 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9463 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9464 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9465 no_fragmentflg, 0, 0,
9466 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9467 chk->whoTo->port, NULL,
9470 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9471 if (error == ENOBUFS) {
9472 asoc->ifp_had_enobuf = 1;
9473 SCTP_STAT_INCR(sctps_lowlevelerr);
9477 asoc->ifp_had_enobuf = 0;
9483 * We don't want to mark the net->sent time here since this
9484 * we use this for HB and retrans cannot measure RTT
9486 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9488 chk->sent = SCTP_DATAGRAM_SENT;
9489 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9493 /* Clean up the fwd-tsn list */
9494 sctp_clean_up_ctl(stcb, asoc, so_locked);
9499 * Ok, it is just data retransmission we need to do or that and a
9500 * fwd-tsn with it all.
9502 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9503 return (SCTP_RETRAN_DONE);
9505 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9506 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9507 /* not yet open, resend the cookie and that is it */
9510 #ifdef SCTP_AUDITING_ENABLED
9511 sctp_auditing(20, inp, stcb, NULL);
9513 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9514 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9515 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9516 /* No, not sent to this net or not ready for rtx */
9519 if (chk->data == NULL) {
9520 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9521 chk->rec.data.tsn, chk->snd_count, chk->sent);
9524 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9525 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9526 struct mbuf *op_err;
9527 char msg[SCTP_DIAG_INFO_LEN];
9529 SCTP_SNPRINTF(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9530 chk->rec.data.tsn, chk->snd_count);
9531 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9533 atomic_add_int(&stcb->asoc.refcnt, 1);
9534 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9536 SCTP_TCB_LOCK(stcb);
9537 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9538 return (SCTP_RETRAN_EXIT);
9540 /* pick up the net */
9542 switch (net->ro._l_addr.sa.sa_family) {
9545 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9550 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9559 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9560 /* No room in peers rwnd */
9563 tsn = asoc->last_acked_seq + 1;
9564 if (tsn == chk->rec.data.tsn) {
9566 * we make a special exception for this
9567 * case. The peer has no rwnd but is missing
9568 * the lowest chunk.. which is probably what
9569 * is holding up the rwnd.
9571 goto one_chunk_around;
9576 if (asoc->peers_rwnd < mtu) {
9578 if ((asoc->peers_rwnd == 0) &&
9579 (asoc->total_flight == 0)) {
9580 chk->window_probe = 1;
9581 chk->whoTo->window_probe = 1;
9584 #ifdef SCTP_AUDITING_ENABLED
9585 sctp_audit_log(0xC3, 2);
9589 net->fast_retran_ip = 0;
9590 if (chk->rec.data.doing_fast_retransmit == 0) {
9592 * if no FR in progress skip destination that have
9593 * flight_size > cwnd.
9595 if (net->flight_size >= net->cwnd) {
9600 * Mark the destination net to have FR recovery
9604 net->fast_retran_ip = 1;
9608 * if no AUTH is yet included and this chunk requires it,
9609 * make sure to account for it. We don't apply the size
9610 * until the AUTH chunk is actually added below in case
9611 * there is no room for this chunk.
9613 if (data_auth_reqd && (auth == NULL)) {
9614 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9618 if ((chk->send_size <= (mtu - dmtu)) ||
9619 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9620 /* ok we will add this one */
9621 if (data_auth_reqd) {
9623 m = sctp_add_auth_chunk(m,
9629 auth_keyid = chk->auth_keyid;
9631 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9632 } else if (override_ok) {
9633 auth_keyid = chk->auth_keyid;
9635 } else if (chk->auth_keyid != auth_keyid) {
9636 /* different keyid, so done bundling */
9640 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9642 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9645 /* Do clear IP_DF ? */
9646 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9649 /* upate our MTU size */
9650 if (mtu > (chk->send_size + dmtu))
9651 mtu -= (chk->send_size + dmtu);
9654 data_list[bundle_at++] = chk;
9655 if (one_chunk && (asoc->total_flight <= 0)) {
9656 SCTP_STAT_INCR(sctps_windowprobed);
9659 if (one_chunk == 0) {
9661 * now are there anymore forward from chk to pick
9664 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9665 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9666 /* Nope, not for retran */
9669 if (fwd->whoTo != net) {
9670 /* Nope, not the net in question */
9673 if (data_auth_reqd && (auth == NULL)) {
9674 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9677 if (fwd->send_size <= (mtu - dmtu)) {
9678 if (data_auth_reqd) {
9680 m = sctp_add_auth_chunk(m,
9686 auth_keyid = fwd->auth_keyid;
9688 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9689 } else if (override_ok) {
9690 auth_keyid = fwd->auth_keyid;
9692 } else if (fwd->auth_keyid != auth_keyid) {
9700 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9702 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9705 /* Do clear IP_DF ? */
9706 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9709 /* upate our MTU size */
9710 if (mtu > (fwd->send_size + dmtu))
9711 mtu -= (fwd->send_size + dmtu);
9714 data_list[bundle_at++] = fwd;
9715 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9719 /* can't fit so we are done */
9724 /* Is there something to send for this destination? */
9727 * No matter if we fail/or succeed we should start a
9728 * timer. A failure is like a lost IP packet :-)
9730 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9732 * no timer running on this destination
9735 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9738 /* Now lets send it, if there is anything to send :> */
9739 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9740 (struct sockaddr *)&net->ro._l_addr, m,
9741 auth_offset, auth, auth_keyid,
9742 no_fragmentflg, 0, 0,
9743 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9747 /* error, we could not output */
9748 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9749 if (error == ENOBUFS) {
9750 asoc->ifp_had_enobuf = 1;
9751 SCTP_STAT_INCR(sctps_lowlevelerr);
9755 asoc->ifp_had_enobuf = 0;
9762 * We don't want to mark the net->sent time here
9763 * since this we use this for HB and retrans cannot
9766 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9768 /* For auto-close */
9770 if (*now_filled == 0) {
9771 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9772 *now = asoc->time_last_sent;
9775 asoc->time_last_sent = *now;
9777 *cnt_out += bundle_at;
9778 #ifdef SCTP_AUDITING_ENABLED
9779 sctp_audit_log(0xC4, bundle_at);
9782 tsns_sent = data_list[0]->rec.data.tsn;
9784 for (i = 0; i < bundle_at; i++) {
9785 SCTP_STAT_INCR(sctps_sendretransdata);
9786 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9788 * When we have a revoked data, and we
9789 * retransmit it, then we clear the revoked
9790 * flag since this flag dictates if we
9791 * subtracted from the fs
9793 if (data_list[i]->rec.data.chunk_was_revoked) {
9794 /* Deflate the cwnd */
9795 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9796 data_list[i]->rec.data.chunk_was_revoked = 0;
9798 data_list[i]->snd_count++;
9799 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9800 /* record the time */
9801 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9802 if (data_list[i]->book_size_scale) {
9804 * need to double the book size on
9807 data_list[i]->book_size_scale = 0;
9809 * Since we double the booksize, we
9810 * must also double the output queue
9811 * size, since this get shrunk when
9812 * we free by this amount.
9814 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9815 data_list[i]->book_size *= 2;
9817 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9818 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9819 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9821 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9822 (uint32_t)(data_list[i]->send_size +
9823 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9825 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9826 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9827 data_list[i]->whoTo->flight_size,
9828 data_list[i]->book_size,
9829 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9830 data_list[i]->rec.data.tsn);
9832 sctp_flight_size_increase(data_list[i]);
9833 sctp_total_flight_increase(stcb, data_list[i]);
9834 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9835 /* SWS sender side engages */
9836 asoc->peers_rwnd = 0;
9839 (data_list[i]->rec.data.doing_fast_retransmit)) {
9840 SCTP_STAT_INCR(sctps_sendfastretrans);
9841 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9842 (tmr_started == 0)) {
9844 * ok we just fast-retrans'd
9845 * the lowest TSN, i.e the
9846 * first on the list. In
9847 * this case we want to give
9848 * some more time to get a
9849 * SACK back without a
9852 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9853 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9854 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9858 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9859 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9861 #ifdef SCTP_AUDITING_ENABLED
9862 sctp_auditing(21, inp, stcb, NULL);
9868 if (asoc->sent_queue_retran_cnt <= 0) {
9869 /* all done we have no more to retran */
9870 asoc->sent_queue_retran_cnt = 0;
9874 /* No more room in rwnd */
9877 /* stop the for loop here. we sent out a packet */
9884 sctp_timer_validation(struct sctp_inpcb *inp,
9885 struct sctp_tcb *stcb,
9886 struct sctp_association *asoc)
9888 struct sctp_nets *net;
9890 /* Validate that a timer is running somewhere */
9891 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9892 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9893 /* Here is a timer */
9897 SCTP_TCB_LOCK_ASSERT(stcb);
9898 /* Gak, we did not have a timer somewhere */
9899 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9900 if (asoc->alternate) {
9901 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9903 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9909 sctp_chunk_output(struct sctp_inpcb *inp,
9910 struct sctp_tcb *stcb,
9915 * Ok this is the generic chunk service queue. we must do the
9917 * - See if there are retransmits pending, if so we must
9919 * - Service the stream queue that is next, moving any
9920 * message (note I must get a complete message i.e.
9921 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9923 * - Check to see if the cwnd/rwnd allows any output, if so we
9924 * go ahead and fomulate and send the low level chunks. Making sure
9925 * to combine any control in the control chunk queue also.
9927 struct sctp_association *asoc;
9928 struct sctp_nets *net;
9929 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9930 unsigned int burst_cnt = 0;
9934 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9937 unsigned int tot_frs = 0;
9941 /* The Nagle algorithm is only applied when handling a send call. */
9942 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9943 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9951 SCTP_TCB_LOCK_ASSERT(stcb);
9953 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9955 if ((un_sent <= 0) &&
9956 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9957 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9958 (asoc->sent_queue_retran_cnt == 0) &&
9959 (asoc->trigger_reset == 0)) {
9960 /* Nothing to do unless there is something to be sent left */
9964 * Do we have something to send, data or control AND a sack timer
9965 * running, if so piggy-back the sack.
9967 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9968 sctp_send_sack(stcb, so_locked);
9969 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
9970 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
9972 while (asoc->sent_queue_retran_cnt) {
9974 * Ok, it is retransmission time only, we send out only ONE
9975 * packet with a single call off to the retran code.
9977 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9979 * Special hook for handling cookiess discarded
9980 * by peer that carried data. Send cookie-ack only
9981 * and then the next call with get the retran's.
9983 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9985 &now, &now_filled, frag_point, so_locked);
9987 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9988 /* if its not from a HB then do it */
9990 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9996 * its from any other place, we don't allow retran
9997 * output (only control)
10002 /* Can't send anymore */
10004 * now lets push out control by calling med-level
10005 * output once. this assures that we WILL send HB's
10008 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10010 &now, &now_filled, frag_point, so_locked);
10011 #ifdef SCTP_AUDITING_ENABLED
10012 sctp_auditing(8, inp, stcb, NULL);
10014 sctp_timer_validation(inp, stcb, asoc);
10019 * The count was off.. retran is not happening so do
10020 * the normal retransmission.
10022 #ifdef SCTP_AUDITING_ENABLED
10023 sctp_auditing(9, inp, stcb, NULL);
10025 if (ret == SCTP_RETRAN_EXIT) {
10030 if (from_where == SCTP_OUTPUT_FROM_T3) {
10031 /* Only one transmission allowed out of a timeout */
10032 #ifdef SCTP_AUDITING_ENABLED
10033 sctp_auditing(10, inp, stcb, NULL);
10035 /* Push out any control */
10036 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10037 &now, &now_filled, frag_point, so_locked);
10040 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10041 /* Hit FR burst limit */
10044 if ((num_out == 0) && (ret == 0)) {
10045 /* No more retrans to send */
10049 #ifdef SCTP_AUDITING_ENABLED
10050 sctp_auditing(12, inp, stcb, NULL);
10052 /* Check for bad destinations, if they exist move chunks around. */
10053 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10054 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10056 * if possible move things off of this address we
10057 * still may send below due to the dormant state but
10058 * we try to find an alternate address to send to
10059 * and if we have one we move all queued data on the
10060 * out wheel to this alternate address.
10062 if (net->ref_count > 1)
10063 sctp_move_chunks_from_net(stcb, net);
10066 * if ((asoc->sat_network) || (net->addr_is_local))
10067 * { burst_limit = asoc->max_burst *
10068 * SCTP_SAT_NETWORK_BURST_INCR; }
10070 if (asoc->max_burst > 0) {
10071 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10072 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10074 * JRS - Use the congestion
10075 * control given in the
10076 * congestion control module
10078 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10080 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10082 SCTP_STAT_INCR(sctps_maxburstqueued);
10084 net->fast_retran_ip = 0;
10086 if (net->flight_size == 0) {
10088 * Should be decaying the
10099 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10100 &reason_code, 0, from_where,
10101 &now, &now_filled, frag_point, so_locked);
10103 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10104 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10105 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10107 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10108 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10109 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10113 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10115 tot_out += num_out;
10117 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10118 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10119 if (num_out == 0) {
10120 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10125 * When the Nagle algorithm is used, look at how
10126 * much is unsent, then if its smaller than an MTU
10127 * and we have data in flight we stop, except if we
10128 * are handling a fragmented user message.
10130 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10131 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10132 (stcb->asoc.total_flight > 0)) {
10133 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10137 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10138 TAILQ_EMPTY(&asoc->send_queue) &&
10139 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10140 /* Nothing left to send */
10143 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10144 /* Nothing left to send */
10147 } while (num_out &&
10148 ((asoc->max_burst == 0) ||
10149 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10150 (burst_cnt < asoc->max_burst)));
10152 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10153 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10154 SCTP_STAT_INCR(sctps_maxburstqueued);
10155 asoc->burst_limit_applied = 1;
10156 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10157 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10160 asoc->burst_limit_applied = 0;
10163 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10164 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10166 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10170 * Now we need to clean up the control chunk chain if a ECNE is on
10171 * it. It must be marked as UNSENT again so next call will continue
10172 * to send it until such time that we get a CWR, to remove it.
10174 if (stcb->asoc.ecn_echo_cnt_onq)
10175 sctp_fix_ecn_echo(asoc);
10177 if (stcb->asoc.trigger_reset) {
10178 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10187 struct sctp_inpcb *inp,
10189 struct sockaddr *addr,
10190 struct mbuf *control,
10195 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10199 if (inp->sctp_socket == NULL) {
10200 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10203 return (sctp_sosend(inp->sctp_socket,
10205 (struct uio *)NULL,
10213 send_forward_tsn(struct sctp_tcb *stcb,
10214 struct sctp_association *asoc)
10216 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10217 struct sctp_forward_tsn_chunk *fwdtsn;
10218 struct sctp_strseq *strseq;
10219 struct sctp_strseq_mid *strseq_m;
10220 uint32_t advance_peer_ack_point;
10221 unsigned int cnt_of_space, i, ovh;
10222 unsigned int space_needed;
10223 unsigned int cnt_of_skipped = 0;
10225 SCTP_TCB_LOCK_ASSERT(stcb);
10226 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10227 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10228 /* mark it to unsent */
10229 chk->sent = SCTP_DATAGRAM_UNSENT;
10230 chk->snd_count = 0;
10231 /* Do we correct its output location? */
10233 sctp_free_remote_addr(chk->whoTo);
10236 goto sctp_fill_in_rest;
10239 /* Ok if we reach here we must build one */
10240 sctp_alloc_a_chunk(stcb, chk);
10244 asoc->fwd_tsn_cnt++;
10245 chk->copy_by_ref = 0;
10247 * We don't do the old thing here since this is used not for on-wire
10248 * but to tell if we are sending a fwd-tsn by the stack during
10249 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10251 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10252 chk->rec.chunk_id.can_take_data = 0;
10256 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10257 if (chk->data == NULL) {
10258 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10261 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10262 chk->sent = SCTP_DATAGRAM_UNSENT;
10263 chk->snd_count = 0;
10264 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10265 asoc->ctrl_queue_cnt++;
10268 * Here we go through and fill out the part that deals with
10269 * stream/seq of the ones we skip.
10271 SCTP_BUF_LEN(chk->data) = 0;
10272 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10273 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10274 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10275 /* no more to look at */
10278 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10279 /* We don't report these */
10284 if (asoc->idata_supported) {
10285 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10286 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10288 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10289 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10291 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10293 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10294 ovh = SCTP_MIN_OVERHEAD;
10296 ovh = SCTP_MIN_V4_OVERHEAD;
10298 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10299 /* trim to a mtu size */
10300 cnt_of_space = asoc->smallest_mtu - ovh;
10302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10303 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10304 0xff, 0, cnt_of_skipped,
10305 asoc->advanced_peer_ack_point);
10307 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10308 if (cnt_of_space < space_needed) {
10310 * ok we must trim down the chunk by lowering the
10311 * advance peer ack point.
10313 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10314 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10315 0xff, 0xff, cnt_of_space,
10318 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10319 if (asoc->idata_supported) {
10320 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10322 cnt_of_skipped /= sizeof(struct sctp_strseq);
10325 * Go through and find the TSN that will be the one
10328 at = TAILQ_FIRST(&asoc->sent_queue);
10330 for (i = 0; i < cnt_of_skipped; i++) {
10331 tp1 = TAILQ_NEXT(at, sctp_next);
10338 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10339 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10340 0xff, cnt_of_skipped, at->rec.data.tsn,
10341 asoc->advanced_peer_ack_point);
10345 * last now points to last one I can report, update
10349 advance_peer_ack_point = last->rec.data.tsn;
10351 if (asoc->idata_supported) {
10352 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10353 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10355 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10356 cnt_of_skipped * sizeof(struct sctp_strseq);
10359 chk->send_size = space_needed;
10360 /* Setup the chunk */
10361 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10362 fwdtsn->ch.chunk_length = htons(chk->send_size);
10363 fwdtsn->ch.chunk_flags = 0;
10364 if (asoc->idata_supported) {
10365 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10367 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10369 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10370 SCTP_BUF_LEN(chk->data) = chk->send_size;
10373 * Move pointer to after the fwdtsn and transfer to the
10376 if (asoc->idata_supported) {
10377 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10380 strseq = (struct sctp_strseq *)fwdtsn;
10384 * Now populate the strseq list. This is done blindly
10385 * without pulling out duplicate stream info. This is
10386 * inefficent but won't harm the process since the peer will
10387 * look at these in sequence and will thus release anything.
10388 * It could mean we exceed the PMTU and chop off some that
10389 * we could have included.. but this is unlikely (aka 1432/4
10390 * would mean 300+ stream seq's would have to be reported in
10391 * one FWD-TSN. With a bit of work we can later FIX this to
10392 * optimize and pull out duplicates.. but it does add more
10393 * overhead. So for now... not!
10396 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10397 if (i >= cnt_of_skipped) {
10400 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10401 /* We don't report these */
10404 if (at->rec.data.tsn == advance_peer_ack_point) {
10405 at->rec.data.fwd_tsn_cnt = 0;
10407 if (asoc->idata_supported) {
10408 strseq_m->sid = htons(at->rec.data.sid);
10409 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10410 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10412 strseq_m->flags = 0;
10414 strseq_m->mid = htonl(at->rec.data.mid);
10417 strseq->sid = htons(at->rec.data.sid);
10418 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10427 sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
10430 * Queue up a SACK or NR-SACK in the control queue.
10431 * We must first check to see if a SACK or NR-SACK is
10432 * somehow on the control queue.
10433 * If so, we will take and and remove the old one.
10435 struct sctp_association *asoc;
10436 struct sctp_tmit_chunk *chk, *a_chk;
10437 struct sctp_sack_chunk *sack;
10438 struct sctp_nr_sack_chunk *nr_sack;
10439 struct sctp_gap_ack_block *gap_descriptor;
10440 const struct sack_track *selector;
10445 int limit_reached = 0;
10446 unsigned int i, siz, j;
10447 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10450 uint32_t highest_tsn;
10455 if (stcb->asoc.nrsack_supported == 1) {
10456 type = SCTP_NR_SELECTIVE_ACK;
10458 type = SCTP_SELECTIVE_ACK;
10461 asoc = &stcb->asoc;
10462 SCTP_TCB_LOCK_ASSERT(stcb);
10463 if (asoc->last_data_chunk_from == NULL) {
10464 /* Hmm we never received anything */
10467 sctp_slide_mapping_arrays(stcb);
10468 sctp_set_rwnd(stcb, asoc);
10469 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10470 if (chk->rec.chunk_id.id == type) {
10471 /* Hmm, found a sack already on queue, remove it */
10472 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10473 asoc->ctrl_queue_cnt--;
10476 sctp_m_freem(a_chk->data);
10477 a_chk->data = NULL;
10479 if (a_chk->whoTo) {
10480 sctp_free_remote_addr(a_chk->whoTo);
10481 a_chk->whoTo = NULL;
10486 if (a_chk == NULL) {
10487 sctp_alloc_a_chunk(stcb, a_chk);
10488 if (a_chk == NULL) {
10489 /* No memory so we drop the idea, and set a timer */
10490 if (stcb->asoc.delayed_ack) {
10491 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10492 stcb->sctp_ep, stcb, NULL,
10493 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10494 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10495 stcb->sctp_ep, stcb, NULL);
10497 stcb->asoc.send_sack = 1;
10501 a_chk->copy_by_ref = 0;
10502 a_chk->rec.chunk_id.id = type;
10503 a_chk->rec.chunk_id.can_take_data = 1;
10505 /* Clear our pkt counts */
10506 asoc->data_pkts_seen = 0;
10509 a_chk->asoc = asoc;
10510 a_chk->snd_count = 0;
10511 a_chk->send_size = 0; /* fill in later */
10512 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10513 a_chk->whoTo = NULL;
10515 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10517 * Ok, the destination for the SACK is unreachable, lets see if
10518 * we can select an alternate to asoc->last_data_chunk_from
10520 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10521 if (a_chk->whoTo == NULL) {
10522 /* Nope, no alternate */
10523 a_chk->whoTo = asoc->last_data_chunk_from;
10526 a_chk->whoTo = asoc->last_data_chunk_from;
10528 if (a_chk->whoTo) {
10529 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10531 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10532 highest_tsn = asoc->highest_tsn_inside_map;
10534 highest_tsn = asoc->highest_tsn_inside_nr_map;
10536 if (highest_tsn == asoc->cumulative_tsn) {
10538 if (type == SCTP_SELECTIVE_ACK) {
10539 space_req = sizeof(struct sctp_sack_chunk);
10541 space_req = sizeof(struct sctp_nr_sack_chunk);
10544 /* gaps get a cluster */
10545 space_req = MCLBYTES;
10547 /* Ok now lets formulate a MBUF with our sack */
10548 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10549 if ((a_chk->data == NULL) ||
10550 (a_chk->whoTo == NULL)) {
10551 /* rats, no mbuf memory */
10553 /* was a problem with the destination */
10554 sctp_m_freem(a_chk->data);
10555 a_chk->data = NULL;
10557 sctp_free_a_chunk(stcb, a_chk, so_locked);
10558 /* sa_ignore NO_NULL_CHK */
10559 if (stcb->asoc.delayed_ack) {
10560 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10561 stcb->sctp_ep, stcb, NULL,
10562 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10563 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10564 stcb->sctp_ep, stcb, NULL);
10566 stcb->asoc.send_sack = 1;
10570 /* ok, lets go through and fill it in */
10571 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10572 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10573 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10574 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10576 limit = mtod(a_chk->data, caddr_t);
10581 if ((asoc->sctp_cmt_on_off > 0) &&
10582 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10584 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10585 * received, then set high bit to 1, else 0. Reset
10588 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10589 asoc->cmt_dac_pkts_rcvd = 0;
10591 #ifdef SCTP_ASOCLOG_OF_TSNS
10592 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10593 stcb->asoc.cumack_log_atsnt++;
10594 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10595 stcb->asoc.cumack_log_atsnt = 0;
10598 /* reset the readers interpretation */
10599 stcb->freed_by_sorcv_sincelast = 0;
10601 if (type == SCTP_SELECTIVE_ACK) {
10602 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10604 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10605 if (highest_tsn > asoc->mapping_array_base_tsn) {
10606 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10608 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
10612 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10613 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10614 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10615 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10617 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10621 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10624 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10626 if (((type == SCTP_SELECTIVE_ACK) &&
10627 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10628 ((type == SCTP_NR_SELECTIVE_ACK) &&
10629 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10630 /* we have a gap .. maybe */
10631 for (i = 0; i < siz; i++) {
10632 tsn_map = asoc->mapping_array[i];
10633 if (type == SCTP_SELECTIVE_ACK) {
10634 tsn_map |= asoc->nr_mapping_array[i];
10638 * Clear all bits corresponding to TSNs
10639 * smaller or equal to the cumulative TSN.
10641 tsn_map &= (~0U << (1 - offset));
10643 selector = &sack_array[tsn_map];
10644 if (mergeable && selector->right_edge) {
10646 * Backup, left and right edges were ok to
10652 if (selector->num_entries == 0)
10655 for (j = 0; j < selector->num_entries; j++) {
10656 if (mergeable && selector->right_edge) {
10658 * do a merge by NOT setting
10664 * no merge, set the left
10668 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10670 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10673 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10679 if (selector->left_edge) {
10683 if (limit_reached) {
10684 /* Reached the limit stop */
10690 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10691 (limit_reached == 0)) {
10694 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10695 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10697 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10700 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10703 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10705 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10706 /* we have a gap .. maybe */
10707 for (i = 0; i < siz; i++) {
10708 tsn_map = asoc->nr_mapping_array[i];
10711 * Clear all bits corresponding to
10712 * TSNs smaller or equal to the
10715 tsn_map &= (~0U << (1 - offset));
10717 selector = &sack_array[tsn_map];
10718 if (mergeable && selector->right_edge) {
10720 * Backup, left and right edges were
10723 num_nr_gap_blocks--;
10726 if (selector->num_entries == 0)
10729 for (j = 0; j < selector->num_entries; j++) {
10730 if (mergeable && selector->right_edge) {
10732 * do a merge by NOT
10739 * no merge, set the
10743 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10745 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10746 num_nr_gap_blocks++;
10748 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10754 if (selector->left_edge) {
10758 if (limit_reached) {
10759 /* Reached the limit stop */
10766 /* now we must add any dups we are going to report. */
10767 if ((limit_reached == 0) && (asoc->numduptsns)) {
10768 dup = (uint32_t *)gap_descriptor;
10769 for (i = 0; i < asoc->numduptsns; i++) {
10770 *dup = htonl(asoc->dup_tsns[i]);
10773 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10778 asoc->numduptsns = 0;
10781 * now that the chunk is prepared queue it to the control chunk
10784 if (type == SCTP_SELECTIVE_ACK) {
10785 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10786 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10787 num_dups * sizeof(int32_t));
10788 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10789 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10790 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10791 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10792 sack->sack.num_dup_tsns = htons(num_dups);
10793 sack->ch.chunk_type = type;
10794 sack->ch.chunk_flags = flags;
10795 sack->ch.chunk_length = htons(a_chk->send_size);
10797 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10798 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10799 num_dups * sizeof(int32_t));
10800 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10801 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10802 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10803 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10804 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10805 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10806 nr_sack->nr_sack.reserved = 0;
10807 nr_sack->ch.chunk_type = type;
10808 nr_sack->ch.chunk_flags = flags;
10809 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10811 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10812 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10813 asoc->ctrl_queue_cnt++;
10814 asoc->send_sack = 0;
10815 SCTP_STAT_INCR(sctps_sendsacks);
10820 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked)
10822 struct mbuf *m_abort, *m, *m_last;
10823 struct mbuf *m_out, *m_end = NULL;
10824 struct sctp_abort_chunk *abort;
10825 struct sctp_auth_chunk *auth = NULL;
10826 struct sctp_nets *net;
10828 uint32_t auth_offset = 0;
10830 uint16_t cause_len, chunk_len, padding_len;
10832 SCTP_TCB_LOCK_ASSERT(stcb);
10834 * Add an AUTH chunk, if chunk requires it and save the offset into
10835 * the chain for AUTH
10837 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10838 stcb->asoc.peer_auth_chunks)) {
10839 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10840 stcb, SCTP_ABORT_ASSOCIATION);
10841 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10845 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10846 if (m_abort == NULL) {
10848 sctp_m_freem(m_out);
10851 sctp_m_freem(operr);
10855 /* link in any error */
10856 SCTP_BUF_NEXT(m_abort) = operr;
10859 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10860 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10861 if (SCTP_BUF_NEXT(m) == NULL) {
10865 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10866 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10867 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10868 if (m_out == NULL) {
10869 /* NO Auth chunk prepended, so reserve space in front */
10870 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10873 /* Put AUTH chunk at the front of the chain */
10874 SCTP_BUF_NEXT(m_end) = m_abort;
10876 if (stcb->asoc.alternate) {
10877 net = stcb->asoc.alternate;
10879 net = stcb->asoc.primary_destination;
10881 /* Fill in the ABORT chunk header. */
10882 abort = mtod(m_abort, struct sctp_abort_chunk *);
10883 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10884 if (stcb->asoc.peer_vtag == 0) {
10885 /* This happens iff the assoc is in COOKIE-WAIT state. */
10886 vtag = stcb->asoc.my_vtag;
10887 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10889 vtag = stcb->asoc.peer_vtag;
10890 abort->ch.chunk_flags = 0;
10892 abort->ch.chunk_length = htons(chunk_len);
10893 /* Add padding, if necessary. */
10894 if (padding_len > 0) {
10895 if ((m_last == NULL) ||
10896 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10897 sctp_m_freem(m_out);
10901 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10902 (struct sockaddr *)&net->ro._l_addr,
10903 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10904 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10905 stcb->asoc.primary_destination->port, NULL,
10908 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10909 if (error == ENOBUFS) {
10910 stcb->asoc.ifp_had_enobuf = 1;
10911 SCTP_STAT_INCR(sctps_lowlevelerr);
10914 stcb->asoc.ifp_had_enobuf = 0;
10916 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10920 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10921 struct sctp_nets *net,
10924 /* formulate and SEND a SHUTDOWN-COMPLETE */
10925 struct mbuf *m_shutdown_comp;
10926 struct sctp_shutdown_complete_chunk *shutdown_complete;
10931 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10932 if (m_shutdown_comp == NULL) {
10936 if (reflect_vtag) {
10937 flags = SCTP_HAD_NO_TCB;
10938 vtag = stcb->asoc.my_vtag;
10941 vtag = stcb->asoc.peer_vtag;
10943 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10944 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10945 shutdown_complete->ch.chunk_flags = flags;
10946 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10947 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10948 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10949 (struct sockaddr *)&net->ro._l_addr,
10950 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10951 stcb->sctp_ep->sctp_lport, stcb->rport,
10955 SCTP_SO_NOT_LOCKED))) {
10956 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10957 if (error == ENOBUFS) {
10958 stcb->asoc.ifp_had_enobuf = 1;
10959 SCTP_STAT_INCR(sctps_lowlevelerr);
10962 stcb->asoc.ifp_had_enobuf = 0;
10964 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10969 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10970 struct sctphdr *sh, uint32_t vtag,
10971 uint8_t type, struct mbuf *cause,
10972 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
10973 uint32_t vrf_id, uint16_t port)
10975 struct mbuf *o_pak;
10977 struct sctphdr *shout;
10978 struct sctp_chunkhdr *ch;
10979 #if defined(INET) || defined(INET6)
10980 struct udphdr *udp;
10982 int ret, len, cause_len, padding_len;
10984 struct sockaddr_in *src_sin, *dst_sin;
10988 struct sockaddr_in6 *src_sin6, *dst_sin6;
10989 struct ip6_hdr *ip6;
10992 /* Compute the length of the cause and add final padding. */
10994 if (cause != NULL) {
10995 struct mbuf *m_at, *m_last = NULL;
10997 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10998 if (SCTP_BUF_NEXT(m_at) == NULL)
11000 cause_len += SCTP_BUF_LEN(m_at);
11002 padding_len = cause_len % 4;
11003 if (padding_len != 0) {
11004 padding_len = 4 - padding_len;
11006 if (padding_len != 0) {
11007 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11008 sctp_m_freem(cause);
11015 /* Get an mbuf for the header. */
11016 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11017 switch (dst->sa_family) {
11020 len += sizeof(struct ip);
11025 len += sizeof(struct ip6_hdr);
11031 #if defined(INET) || defined(INET6)
11033 len += sizeof(struct udphdr);
11036 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11037 if (mout == NULL) {
11039 sctp_m_freem(cause);
11043 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11044 SCTP_BUF_LEN(mout) = len;
11045 SCTP_BUF_NEXT(mout) = cause;
11046 M_SETFIB(mout, fibnum);
11047 mout->m_pkthdr.flowid = mflowid;
11048 M_HASHTYPE_SET(mout, mflowtype);
11055 switch (dst->sa_family) {
11058 src_sin = (struct sockaddr_in *)src;
11059 dst_sin = (struct sockaddr_in *)dst;
11060 ip = mtod(mout, struct ip *);
11061 ip->ip_v = IPVERSION;
11062 ip->ip_hl = (sizeof(struct ip) >> 2);
11064 ip->ip_off = htons(IP_DF);
11066 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11068 ip->ip_p = IPPROTO_UDP;
11070 ip->ip_p = IPPROTO_SCTP;
11072 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11073 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11075 len = sizeof(struct ip);
11076 shout = (struct sctphdr *)((caddr_t)ip + len);
11081 src_sin6 = (struct sockaddr_in6 *)src;
11082 dst_sin6 = (struct sockaddr_in6 *)dst;
11083 ip6 = mtod(mout, struct ip6_hdr *);
11084 ip6->ip6_flow = htonl(0x60000000);
11085 if (V_ip6_auto_flowlabel) {
11086 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11088 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11090 ip6->ip6_nxt = IPPROTO_UDP;
11092 ip6->ip6_nxt = IPPROTO_SCTP;
11094 ip6->ip6_src = dst_sin6->sin6_addr;
11095 ip6->ip6_dst = src_sin6->sin6_addr;
11096 len = sizeof(struct ip6_hdr);
11097 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11102 shout = mtod(mout, struct sctphdr *);
11105 #if defined(INET) || defined(INET6)
11107 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11108 sctp_m_freem(mout);
11111 udp = (struct udphdr *)shout;
11112 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11113 udp->uh_dport = port;
11115 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11116 sizeof(struct sctphdr) +
11117 sizeof(struct sctp_chunkhdr) +
11118 cause_len + padding_len));
11119 len += sizeof(struct udphdr);
11120 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11125 shout->src_port = sh->dest_port;
11126 shout->dest_port = sh->src_port;
11127 shout->checksum = 0;
11129 shout->v_tag = htonl(vtag);
11131 shout->v_tag = sh->v_tag;
11133 len += sizeof(struct sctphdr);
11134 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11135 ch->chunk_type = type;
11137 ch->chunk_flags = 0;
11139 ch->chunk_flags = SCTP_HAD_NO_TCB;
11141 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11142 len += sizeof(struct sctp_chunkhdr);
11143 len += cause_len + padding_len;
11145 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11146 sctp_m_freem(mout);
11149 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11150 switch (dst->sa_family) {
11155 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11160 ip->ip_len = htons(len);
11162 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11163 SCTP_STAT_INCR(sctps_sendswcrc);
11165 SCTP_ENABLE_UDP_CSUM(o_pak);
11168 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11169 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11170 SCTP_STAT_INCR(sctps_sendhwcrc);
11172 #ifdef SCTP_PACKET_LOGGING
11173 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11174 sctp_packet_log(o_pak);
11177 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11178 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11183 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11185 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11186 SCTP_STAT_INCR(sctps_sendswcrc);
11187 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11188 udp->uh_sum = 0xffff;
11191 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11192 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11193 SCTP_STAT_INCR(sctps_sendhwcrc);
11195 #ifdef SCTP_PACKET_LOGGING
11196 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11197 sctp_packet_log(o_pak);
11200 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11201 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11205 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11207 sctp_m_freem(mout);
11208 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11211 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11213 UDPSTAT_INC(udps_opackets);
11215 SCTP_STAT_INCR(sctps_sendpackets);
11216 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11217 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11219 SCTP_STAT_INCR(sctps_senderrors);
11225 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11226 struct sctphdr *sh,
11227 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11228 uint32_t vrf_id, uint16_t port)
11230 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11231 mflowtype, mflowid, fibnum,
11236 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
11238 struct sctp_tmit_chunk *chk;
11239 struct sctp_heartbeat_chunk *hb;
11240 struct timeval now;
11242 SCTP_TCB_LOCK_ASSERT(stcb);
11246 (void)SCTP_GETTIME_TIMEVAL(&now);
11247 switch (net->ro._l_addr.sa.sa_family) {
11259 sctp_alloc_a_chunk(stcb, chk);
11261 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11265 chk->copy_by_ref = 0;
11266 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11267 chk->rec.chunk_id.can_take_data = 1;
11269 chk->asoc = &stcb->asoc;
11270 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11272 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11273 if (chk->data == NULL) {
11274 sctp_free_a_chunk(stcb, chk, so_locked);
11277 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11278 SCTP_BUF_LEN(chk->data) = chk->send_size;
11279 chk->sent = SCTP_DATAGRAM_UNSENT;
11280 chk->snd_count = 0;
11282 atomic_add_int(&chk->whoTo->ref_count, 1);
11283 /* Now we have a mbuf that we can fill in with the details */
11284 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11285 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11286 /* fill out chunk header */
11287 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11288 hb->ch.chunk_flags = 0;
11289 hb->ch.chunk_length = htons(chk->send_size);
11290 /* Fill out hb parameter */
11291 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11292 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11293 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11294 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11295 /* Did our user request this one, put it in */
11296 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11297 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11298 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11300 * we only take from the entropy pool if the address is not
11303 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11304 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11306 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11307 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11309 switch (net->ro._l_addr.sa.sa_family) {
11312 memcpy(hb->heartbeat.hb_info.address,
11313 &net->ro._l_addr.sin.sin_addr,
11314 sizeof(net->ro._l_addr.sin.sin_addr));
11319 memcpy(hb->heartbeat.hb_info.address,
11320 &net->ro._l_addr.sin6.sin6_addr,
11321 sizeof(net->ro._l_addr.sin6.sin6_addr));
11326 sctp_m_freem(chk->data);
11329 sctp_free_a_chunk(stcb, chk, so_locked);
11333 net->hb_responded = 0;
11334 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11335 stcb->asoc.ctrl_queue_cnt++;
11336 SCTP_STAT_INCR(sctps_sendheartbeat);
11341 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11344 struct sctp_association *asoc;
11345 struct sctp_ecne_chunk *ecne;
11346 struct sctp_tmit_chunk *chk;
11351 asoc = &stcb->asoc;
11352 SCTP_TCB_LOCK_ASSERT(stcb);
11353 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11354 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11355 /* found a previous ECN_ECHO update it if needed */
11356 uint32_t cnt, ctsn;
11358 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11359 ctsn = ntohl(ecne->tsn);
11360 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11361 ecne->tsn = htonl(high_tsn);
11362 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11364 cnt = ntohl(ecne->num_pkts_since_cwr);
11366 ecne->num_pkts_since_cwr = htonl(cnt);
11370 /* nope could not find one to update so we must build one */
11371 sctp_alloc_a_chunk(stcb, chk);
11375 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11376 chk->copy_by_ref = 0;
11377 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11378 chk->rec.chunk_id.can_take_data = 0;
11380 chk->asoc = &stcb->asoc;
11381 chk->send_size = sizeof(struct sctp_ecne_chunk);
11382 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11383 if (chk->data == NULL) {
11384 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11387 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11388 SCTP_BUF_LEN(chk->data) = chk->send_size;
11389 chk->sent = SCTP_DATAGRAM_UNSENT;
11390 chk->snd_count = 0;
11392 atomic_add_int(&chk->whoTo->ref_count, 1);
11394 stcb->asoc.ecn_echo_cnt_onq++;
11395 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11396 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11397 ecne->ch.chunk_flags = 0;
11398 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11399 ecne->tsn = htonl(high_tsn);
11400 ecne->num_pkts_since_cwr = htonl(1);
11401 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11402 asoc->ctrl_queue_cnt++;
11406 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11407 struct mbuf *m, int len, int iphlen, int bad_crc)
11409 struct sctp_association *asoc;
11410 struct sctp_pktdrop_chunk *drp;
11411 struct sctp_tmit_chunk *chk;
11417 struct sctp_chunkhdr *ch, chunk_buf;
11418 unsigned int chk_length;
11423 asoc = &stcb->asoc;
11424 SCTP_TCB_LOCK_ASSERT(stcb);
11425 if (asoc->pktdrop_supported == 0) {
11427 * peer must declare support before I send one.
11431 if (stcb->sctp_socket == NULL) {
11434 sctp_alloc_a_chunk(stcb, chk);
11438 chk->copy_by_ref = 0;
11439 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11440 chk->rec.chunk_id.can_take_data = 1;
11443 chk->send_size = len;
11444 /* Validate that we do not have an ABORT in here. */
11445 offset = iphlen + sizeof(struct sctphdr);
11446 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11447 sizeof(*ch), (uint8_t *)&chunk_buf);
11448 while (ch != NULL) {
11449 chk_length = ntohs(ch->chunk_length);
11450 if (chk_length < sizeof(*ch)) {
11451 /* break to abort land */
11454 switch (ch->chunk_type) {
11455 case SCTP_PACKET_DROPPED:
11456 case SCTP_ABORT_ASSOCIATION:
11457 case SCTP_INITIATION_ACK:
11459 * We don't respond with an PKT-DROP to an ABORT
11460 * or PKT-DROP. We also do not respond to an
11461 * INIT-ACK, because we can't know if the initiation
11462 * tag is correct or not.
11464 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11469 offset += SCTP_SIZE32(chk_length);
11470 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11471 sizeof(*ch), (uint8_t *)&chunk_buf);
11474 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11475 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11477 * only send 1 mtu worth, trim off the excess on the end.
11480 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11483 chk->asoc = &stcb->asoc;
11484 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11485 if (chk->data == NULL) {
11487 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11490 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11491 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11493 sctp_m_freem(chk->data);
11497 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11498 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11499 chk->book_size_scale = 0;
11501 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11502 drp->trunc_len = htons(fullsz);
11504 * Len is already adjusted to size minus overhead above take
11505 * out the pkt_drop chunk itself from it.
11507 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11508 len = chk->send_size;
11510 /* no truncation needed */
11511 drp->ch.chunk_flags = 0;
11512 drp->trunc_len = htons(0);
11515 drp->ch.chunk_flags |= SCTP_BADCRC;
11517 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11518 SCTP_BUF_LEN(chk->data) = chk->send_size;
11519 chk->sent = SCTP_DATAGRAM_UNSENT;
11520 chk->snd_count = 0;
11522 /* we should hit here */
11524 atomic_add_int(&chk->whoTo->ref_count, 1);
11528 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11529 drp->ch.chunk_length = htons(chk->send_size);
11530 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11534 drp->bottle_bw = htonl(spc);
11535 if (asoc->my_rwnd) {
11536 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11537 asoc->size_on_all_streams +
11538 asoc->my_rwnd_control_len +
11539 stcb->sctp_socket->so_rcv.sb_cc);
11542 * If my rwnd is 0, possibly from mbuf depletion as well as
11543 * space used, tell the peer there is NO space aka onq == bw
11545 drp->current_onq = htonl(spc);
11549 m_copydata(m, iphlen, len, (caddr_t)datap);
11550 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11551 asoc->ctrl_queue_cnt++;
11555 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11557 struct sctp_association *asoc;
11558 struct sctp_cwr_chunk *cwr;
11559 struct sctp_tmit_chunk *chk;
11561 SCTP_TCB_LOCK_ASSERT(stcb);
11565 asoc = &stcb->asoc;
11566 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11567 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11569 * found a previous CWR queued to same destination
11570 * update it if needed
11574 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11575 ctsn = ntohl(cwr->tsn);
11576 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11577 cwr->tsn = htonl(high_tsn);
11579 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11580 /* Make sure override is carried */
11581 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11586 sctp_alloc_a_chunk(stcb, chk);
11590 chk->copy_by_ref = 0;
11591 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11592 chk->rec.chunk_id.can_take_data = 1;
11594 chk->asoc = &stcb->asoc;
11595 chk->send_size = sizeof(struct sctp_cwr_chunk);
11596 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11597 if (chk->data == NULL) {
11598 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11601 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11602 SCTP_BUF_LEN(chk->data) = chk->send_size;
11603 chk->sent = SCTP_DATAGRAM_UNSENT;
11604 chk->snd_count = 0;
11606 atomic_add_int(&chk->whoTo->ref_count, 1);
11607 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11608 cwr->ch.chunk_type = SCTP_ECN_CWR;
11609 cwr->ch.chunk_flags = override;
11610 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11611 cwr->tsn = htonl(high_tsn);
11612 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11613 asoc->ctrl_queue_cnt++;
11617 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11618 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11620 uint16_t len, old_len, i;
11621 struct sctp_stream_reset_out_request *req_out;
11622 struct sctp_chunkhdr *ch;
11624 int number_entries = 0;
11626 ch = mtod(chk->data, struct sctp_chunkhdr *);
11627 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11628 /* get to new offset for the param. */
11629 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11630 /* now how long will this param be? */
11631 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11632 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11633 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11634 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11638 if (number_entries == 0) {
11641 if (number_entries == stcb->asoc.streamoutcnt) {
11642 number_entries = 0;
11644 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11645 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11647 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11648 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11649 req_out->ph.param_length = htons(len);
11650 req_out->request_seq = htonl(seq);
11651 req_out->response_seq = htonl(resp_seq);
11652 req_out->send_reset_at_tsn = htonl(last_sent);
11654 if (number_entries) {
11655 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11656 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11657 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11658 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11659 req_out->list_of_streams[at] = htons(i);
11661 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11662 if (at >= number_entries) {
11668 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11669 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11672 if (SCTP_SIZE32(len) > len) {
11674 * Need to worry about the pad we may end up adding to the
11675 * end. This is easy since the struct is either aligned to 4
11676 * bytes or 2 bytes off.
11678 req_out->list_of_streams[number_entries] = 0;
11680 /* now fix the chunk length */
11681 ch->chunk_length = htons(len + old_len);
11682 chk->book_size = len + old_len;
11683 chk->book_size_scale = 0;
11684 chk->send_size = SCTP_SIZE32(chk->book_size);
11685 SCTP_BUF_LEN(chk->data) = chk->send_size;
11690 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11691 int number_entries, uint16_t *list,
11694 uint16_t len, old_len, i;
11695 struct sctp_stream_reset_in_request *req_in;
11696 struct sctp_chunkhdr *ch;
11698 ch = mtod(chk->data, struct sctp_chunkhdr *);
11699 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11701 /* get to new offset for the param. */
11702 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11703 /* now how long will this param be? */
11704 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11705 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11706 req_in->ph.param_length = htons(len);
11707 req_in->request_seq = htonl(seq);
11708 if (number_entries) {
11709 for (i = 0; i < number_entries; i++) {
11710 req_in->list_of_streams[i] = htons(list[i]);
11713 if (SCTP_SIZE32(len) > len) {
11715 * Need to worry about the pad we may end up adding to the
11716 * end. This is easy since the struct is either aligned to 4
11717 * bytes or 2 bytes off.
11719 req_in->list_of_streams[number_entries] = 0;
11721 /* now fix the chunk length */
11722 ch->chunk_length = htons(len + old_len);
11723 chk->book_size = len + old_len;
11724 chk->book_size_scale = 0;
11725 chk->send_size = SCTP_SIZE32(chk->book_size);
11726 SCTP_BUF_LEN(chk->data) = chk->send_size;
11731 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11734 uint16_t len, old_len;
11735 struct sctp_stream_reset_tsn_request *req_tsn;
11736 struct sctp_chunkhdr *ch;
11738 ch = mtod(chk->data, struct sctp_chunkhdr *);
11739 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11741 /* get to new offset for the param. */
11742 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11743 /* now how long will this param be? */
11744 len = sizeof(struct sctp_stream_reset_tsn_request);
11745 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11746 req_tsn->ph.param_length = htons(len);
11747 req_tsn->request_seq = htonl(seq);
11749 /* now fix the chunk length */
11750 ch->chunk_length = htons(len + old_len);
11751 chk->send_size = len + old_len;
11752 chk->book_size = SCTP_SIZE32(chk->send_size);
11753 chk->book_size_scale = 0;
11754 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11759 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11760 uint32_t resp_seq, uint32_t result)
11762 uint16_t len, old_len;
11763 struct sctp_stream_reset_response *resp;
11764 struct sctp_chunkhdr *ch;
11766 ch = mtod(chk->data, struct sctp_chunkhdr *);
11767 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11769 /* get to new offset for the param. */
11770 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11771 /* now how long will this param be? */
11772 len = sizeof(struct sctp_stream_reset_response);
11773 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11774 resp->ph.param_length = htons(len);
11775 resp->response_seq = htonl(resp_seq);
11776 resp->result = ntohl(result);
11778 /* now fix the chunk length */
11779 ch->chunk_length = htons(len + old_len);
11780 chk->book_size = len + old_len;
11781 chk->book_size_scale = 0;
11782 chk->send_size = SCTP_SIZE32(chk->book_size);
11783 SCTP_BUF_LEN(chk->data) = chk->send_size;
11788 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11789 struct sctp_stream_reset_list *ent,
11792 struct sctp_association *asoc;
11793 struct sctp_tmit_chunk *chk;
11794 struct sctp_chunkhdr *ch;
11796 asoc = &stcb->asoc;
11799 * Reset our last reset action to the new one IP -> response
11800 * (PERFORMED probably). This assures that if we fail to send, a
11801 * retran from the peer will get the new response.
11803 asoc->last_reset_action[0] = response;
11804 if (asoc->stream_reset_outstanding) {
11807 sctp_alloc_a_chunk(stcb, chk);
11809 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11812 chk->copy_by_ref = 0;
11813 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11814 chk->rec.chunk_id.can_take_data = 0;
11816 chk->asoc = &stcb->asoc;
11817 chk->book_size = sizeof(struct sctp_chunkhdr);
11818 chk->send_size = SCTP_SIZE32(chk->book_size);
11819 chk->book_size_scale = 0;
11820 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11821 if (chk->data == NULL) {
11822 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11823 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11826 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11827 /* setup chunk parameters */
11828 chk->sent = SCTP_DATAGRAM_UNSENT;
11829 chk->snd_count = 0;
11830 if (stcb->asoc.alternate) {
11831 chk->whoTo = stcb->asoc.alternate;
11833 chk->whoTo = stcb->asoc.primary_destination;
11835 ch = mtod(chk->data, struct sctp_chunkhdr *);
11836 ch->chunk_type = SCTP_STREAM_RESET;
11837 ch->chunk_flags = 0;
11838 ch->chunk_length = htons(chk->book_size);
11839 atomic_add_int(&chk->whoTo->ref_count, 1);
11840 SCTP_BUF_LEN(chk->data) = chk->send_size;
11841 sctp_add_stream_reset_result(chk, ent->seq, response);
11842 /* insert the chunk for sending */
11843 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11846 asoc->ctrl_queue_cnt++;
11850 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11851 uint32_t resp_seq, uint32_t result,
11852 uint32_t send_una, uint32_t recv_next)
11854 uint16_t len, old_len;
11855 struct sctp_stream_reset_response_tsn *resp;
11856 struct sctp_chunkhdr *ch;
11858 ch = mtod(chk->data, struct sctp_chunkhdr *);
11859 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11861 /* get to new offset for the param. */
11862 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11863 /* now how long will this param be? */
11864 len = sizeof(struct sctp_stream_reset_response_tsn);
11865 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11866 resp->ph.param_length = htons(len);
11867 resp->response_seq = htonl(resp_seq);
11868 resp->result = htonl(result);
11869 resp->senders_next_tsn = htonl(send_una);
11870 resp->receivers_next_tsn = htonl(recv_next);
11872 /* now fix the chunk length */
11873 ch->chunk_length = htons(len + old_len);
11874 chk->book_size = len + old_len;
11875 chk->send_size = SCTP_SIZE32(chk->book_size);
11876 chk->book_size_scale = 0;
11877 SCTP_BUF_LEN(chk->data) = chk->send_size;
11882 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11886 uint16_t len, old_len;
11887 struct sctp_chunkhdr *ch;
11888 struct sctp_stream_reset_add_strm *addstr;
11890 ch = mtod(chk->data, struct sctp_chunkhdr *);
11891 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11893 /* get to new offset for the param. */
11894 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11895 /* now how long will this param be? */
11896 len = sizeof(struct sctp_stream_reset_add_strm);
11899 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11900 addstr->ph.param_length = htons(len);
11901 addstr->request_seq = htonl(seq);
11902 addstr->number_of_streams = htons(adding);
11903 addstr->reserved = 0;
11905 /* now fix the chunk length */
11906 ch->chunk_length = htons(len + old_len);
11907 chk->send_size = len + old_len;
11908 chk->book_size = SCTP_SIZE32(chk->send_size);
11909 chk->book_size_scale = 0;
11910 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11915 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11919 uint16_t len, old_len;
11920 struct sctp_chunkhdr *ch;
11921 struct sctp_stream_reset_add_strm *addstr;
11923 ch = mtod(chk->data, struct sctp_chunkhdr *);
11924 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11926 /* get to new offset for the param. */
11927 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11928 /* now how long will this param be? */
11929 len = sizeof(struct sctp_stream_reset_add_strm);
11931 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11932 addstr->ph.param_length = htons(len);
11933 addstr->request_seq = htonl(seq);
11934 addstr->number_of_streams = htons(adding);
11935 addstr->reserved = 0;
11937 /* now fix the chunk length */
11938 ch->chunk_length = htons(len + old_len);
11939 chk->send_size = len + old_len;
11940 chk->book_size = SCTP_SIZE32(chk->send_size);
11941 chk->book_size_scale = 0;
11942 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11947 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11949 struct sctp_association *asoc;
11950 struct sctp_tmit_chunk *chk;
11951 struct sctp_chunkhdr *ch;
11954 asoc = &stcb->asoc;
11955 asoc->trigger_reset = 0;
11956 if (asoc->stream_reset_outstanding) {
11959 sctp_alloc_a_chunk(stcb, chk);
11961 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11964 chk->copy_by_ref = 0;
11965 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11966 chk->rec.chunk_id.can_take_data = 0;
11968 chk->asoc = &stcb->asoc;
11969 chk->book_size = sizeof(struct sctp_chunkhdr);
11970 chk->send_size = SCTP_SIZE32(chk->book_size);
11971 chk->book_size_scale = 0;
11972 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11973 if (chk->data == NULL) {
11974 sctp_free_a_chunk(stcb, chk, so_locked);
11975 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11978 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11980 /* setup chunk parameters */
11981 chk->sent = SCTP_DATAGRAM_UNSENT;
11982 chk->snd_count = 0;
11983 if (stcb->asoc.alternate) {
11984 chk->whoTo = stcb->asoc.alternate;
11986 chk->whoTo = stcb->asoc.primary_destination;
11988 ch = mtod(chk->data, struct sctp_chunkhdr *);
11989 ch->chunk_type = SCTP_STREAM_RESET;
11990 ch->chunk_flags = 0;
11991 ch->chunk_length = htons(chk->book_size);
11992 atomic_add_int(&chk->whoTo->ref_count, 1);
11993 SCTP_BUF_LEN(chk->data) = chk->send_size;
11994 seq = stcb->asoc.str_reset_seq_out;
11995 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
11997 asoc->stream_reset_outstanding++;
11999 m_freem(chk->data);
12001 sctp_free_a_chunk(stcb, chk, so_locked);
12004 asoc->str_reset = chk;
12005 /* insert the chunk for sending */
12006 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12009 asoc->ctrl_queue_cnt++;
12011 if (stcb->asoc.send_sack) {
12012 sctp_send_sack(stcb, so_locked);
12014 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12019 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12020 uint16_t number_entries, uint16_t *list,
12021 uint8_t send_in_req,
12022 uint8_t send_tsn_req,
12023 uint8_t add_stream,
12025 uint16_t adding_i, uint8_t peer_asked)
12027 struct sctp_association *asoc;
12028 struct sctp_tmit_chunk *chk;
12029 struct sctp_chunkhdr *ch;
12030 int can_send_out_req = 0;
12033 asoc = &stcb->asoc;
12034 if (asoc->stream_reset_outstanding) {
12036 * Already one pending, must get ACK back to clear the flag.
12038 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12041 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12042 (add_stream == 0)) {
12043 /* nothing to do */
12044 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12047 if (send_tsn_req && send_in_req) {
12048 /* error, can't do that */
12049 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12051 } else if (send_in_req) {
12052 can_send_out_req = 1;
12054 if (number_entries > (MCLBYTES -
12055 SCTP_MIN_OVERHEAD -
12056 sizeof(struct sctp_chunkhdr) -
12057 sizeof(struct sctp_stream_reset_out_request)) /
12058 sizeof(uint16_t)) {
12059 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12062 sctp_alloc_a_chunk(stcb, chk);
12064 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12067 chk->copy_by_ref = 0;
12068 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12069 chk->rec.chunk_id.can_take_data = 0;
12071 chk->asoc = &stcb->asoc;
12072 chk->book_size = sizeof(struct sctp_chunkhdr);
12073 chk->send_size = SCTP_SIZE32(chk->book_size);
12074 chk->book_size_scale = 0;
12075 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12076 if (chk->data == NULL) {
12077 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12078 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12081 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12083 /* setup chunk parameters */
12084 chk->sent = SCTP_DATAGRAM_UNSENT;
12085 chk->snd_count = 0;
12086 if (stcb->asoc.alternate) {
12087 chk->whoTo = stcb->asoc.alternate;
12089 chk->whoTo = stcb->asoc.primary_destination;
12091 atomic_add_int(&chk->whoTo->ref_count, 1);
12092 ch = mtod(chk->data, struct sctp_chunkhdr *);
12093 ch->chunk_type = SCTP_STREAM_RESET;
12094 ch->chunk_flags = 0;
12095 ch->chunk_length = htons(chk->book_size);
12096 SCTP_BUF_LEN(chk->data) = chk->send_size;
12098 seq = stcb->asoc.str_reset_seq_out;
12099 if (can_send_out_req) {
12102 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12105 asoc->stream_reset_outstanding++;
12108 if ((add_stream & 1) &&
12109 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12110 /* Need to allocate more */
12111 struct sctp_stream_out *oldstream;
12112 struct sctp_stream_queue_pending *sp, *nsp;
12114 #if defined(SCTP_DETAILED_STR_STATS)
12118 oldstream = stcb->asoc.strmout;
12119 /* get some more */
12120 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12121 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12123 if (stcb->asoc.strmout == NULL) {
12126 stcb->asoc.strmout = oldstream;
12127 /* Turn off the bit */
12128 x = add_stream & 0xfe;
12133 * Ok now we proceed with copying the old out stuff and
12134 * initializing the new stuff.
12136 SCTP_TCB_SEND_LOCK(stcb);
12137 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12138 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12139 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12140 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12141 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12142 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12143 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12144 stcb->asoc.strmout[i].sid = i;
12145 stcb->asoc.strmout[i].state = oldstream[i].state;
12146 /* FIX ME FIX ME */
12148 * This should be a SS_COPY operation FIX ME STREAM
12151 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12152 /* now anything on those queues? */
12153 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12154 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12155 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12158 /* now the new streams */
12159 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12160 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12161 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12162 stcb->asoc.strmout[i].chunks_on_queues = 0;
12163 #if defined(SCTP_DETAILED_STR_STATS)
12164 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12165 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12166 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12169 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12170 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12172 stcb->asoc.strmout[i].next_mid_ordered = 0;
12173 stcb->asoc.strmout[i].next_mid_unordered = 0;
12174 stcb->asoc.strmout[i].sid = i;
12175 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12176 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12177 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12179 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12180 SCTP_FREE(oldstream, SCTP_M_STRMO);
12181 SCTP_TCB_SEND_UNLOCK(stcb);
12184 if ((add_stream & 1) && (adding_o > 0)) {
12185 asoc->strm_pending_add_size = adding_o;
12186 asoc->peer_req_out = peer_asked;
12187 sctp_add_an_out_stream(chk, seq, adding_o);
12189 asoc->stream_reset_outstanding++;
12191 if ((add_stream & 2) && (adding_i > 0)) {
12192 sctp_add_an_in_stream(chk, seq, adding_i);
12194 asoc->stream_reset_outstanding++;
12197 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12199 asoc->stream_reset_outstanding++;
12201 if (send_tsn_req) {
12202 sctp_add_stream_reset_tsn(chk, seq);
12203 asoc->stream_reset_outstanding++;
12205 asoc->str_reset = chk;
12206 /* insert the chunk for sending */
12207 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12210 asoc->ctrl_queue_cnt++;
12211 if (stcb->asoc.send_sack) {
12212 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12214 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12219 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12220 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12221 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12222 uint32_t vrf_id, uint16_t port)
12224 /* Don't respond to an ABORT with an ABORT. */
12225 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12227 sctp_m_freem(cause);
12230 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12231 mflowtype, mflowid, fibnum,
12237 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12238 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12239 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12240 uint32_t vrf_id, uint16_t port)
12242 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12243 mflowtype, mflowid, fibnum,
12248 static struct mbuf *
12249 sctp_copy_resume(struct uio *uio,
12251 int user_marks_eor,
12254 struct mbuf **new_tail)
12258 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12259 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12261 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12264 *sndout = m_length(m, NULL);
12265 *new_tail = m_last(m);
12271 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12275 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12277 if (sp->data == NULL) {
12278 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12282 sp->tail_mbuf = m_last(sp->data);
12286 static struct sctp_stream_queue_pending *
12287 sctp_copy_it_in(struct sctp_tcb *stcb,
12288 struct sctp_association *asoc,
12289 struct sctp_sndrcvinfo *srcv,
12291 struct sctp_nets *net,
12292 ssize_t max_send_len,
12293 int user_marks_eor,
12298 * This routine must be very careful in its work. Protocol
12299 * processing is up and running so care must be taken to spl...()
12300 * when you need to do something that may effect the stcb/asoc. The
12301 * sb is locked however. When data is copied the protocol processing
12302 * should be enabled since this is a slower operation...
12304 struct sctp_stream_queue_pending *sp = NULL;
12308 /* Now can we send this? */
12309 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12310 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12311 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12312 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12313 /* got data while shutting down */
12314 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12315 *error = ECONNRESET;
12318 sctp_alloc_a_strmoq(stcb, sp);
12320 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12325 sp->sender_all_done = 0;
12326 sp->sinfo_flags = srcv->sinfo_flags;
12327 sp->timetolive = srcv->sinfo_timetolive;
12328 sp->ppid = srcv->sinfo_ppid;
12329 sp->context = srcv->sinfo_context;
12331 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12333 sp->sid = srcv->sinfo_stream;
12334 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12335 if ((sp->length == (uint32_t)uio->uio_resid) &&
12336 ((user_marks_eor == 0) ||
12337 (srcv->sinfo_flags & SCTP_EOF) ||
12338 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12339 sp->msg_is_complete = 1;
12341 sp->msg_is_complete = 0;
12343 sp->sender_all_done = 0;
12344 sp->some_taken = 0;
12345 sp->put_last_out = 0;
12346 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12347 sp->data = sp->tail_mbuf = NULL;
12348 if (sp->length == 0) {
12351 if (srcv->sinfo_keynumber_valid) {
12352 sp->auth_keyid = srcv->sinfo_keynumber;
12354 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12356 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12357 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12358 sp->holds_key_ref = 1;
12360 *error = sctp_copy_one(sp, uio, resv_in_first);
12363 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12366 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12368 atomic_add_int(&sp->net->ref_count, 1);
12372 sctp_set_prsctp_policy(sp);
12379 sctp_sosend(struct socket *so,
12380 struct sockaddr *addr,
12383 struct mbuf *control,
12388 int error, use_sndinfo = 0;
12389 struct sctp_sndrcvinfo sndrcvninfo;
12390 struct sockaddr *addr_to_use;
12391 #if defined(INET) && defined(INET6)
12392 struct sockaddr_in sin;
12396 /* process cmsg snd/rcv info (maybe a assoc-id) */
12397 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12398 sizeof(sndrcvninfo))) {
12403 addr_to_use = addr;
12404 #if defined(INET) && defined(INET6)
12405 if ((addr) && (addr->sa_family == AF_INET6)) {
12406 struct sockaddr_in6 *sin6;
12408 sin6 = (struct sockaddr_in6 *)addr;
12409 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12410 in6_sin6_2_sin(&sin, sin6);
12411 addr_to_use = (struct sockaddr *)&sin;
12415 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12418 use_sndinfo ? &sndrcvninfo : NULL
12425 sctp_lower_sosend(struct socket *so,
12426 struct sockaddr *addr,
12428 struct mbuf *i_pak,
12429 struct mbuf *control,
12431 struct sctp_sndrcvinfo *srcv
12436 struct epoch_tracker et;
12437 ssize_t sndlen = 0, max_len, local_add_more;
12439 struct mbuf *top = NULL;
12440 int queue_only = 0, queue_only_for_init = 0;
12441 int free_cnt_applied = 0;
12443 int now_filled = 0;
12444 unsigned int inqueue_bytes = 0;
12445 struct sctp_block_entry be;
12446 struct sctp_inpcb *inp;
12447 struct sctp_tcb *stcb = NULL;
12448 struct timeval now;
12449 struct sctp_nets *net;
12450 struct sctp_association *asoc;
12451 struct sctp_inpcb *t_inp;
12452 int user_marks_eor;
12453 int create_lock_applied = 0;
12454 int nagle_applies = 0;
12455 int some_on_control = 0;
12456 int got_all_of_the_send = 0;
12457 int hold_tcblock = 0;
12458 int non_blocking = 0;
12459 ssize_t local_soresv = 0;
12461 uint16_t sinfo_flags;
12462 sctp_assoc_t sinfo_assoc_id;
12469 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12471 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12474 SCTP_RELEASE_PKT(i_pak);
12478 if ((uio == NULL) && (i_pak == NULL)) {
12479 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12482 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12483 atomic_add_int(&inp->total_sends, 1);
12485 if (uio->uio_resid < 0) {
12486 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12489 sndlen = uio->uio_resid;
12491 top = SCTP_HEADER_TO_CHAIN(i_pak);
12492 sndlen = SCTP_HEADER_LEN(i_pak);
12494 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zd\n",
12497 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12498 SCTP_IS_LISTENING(inp)) {
12499 /* The listener can NOT send */
12500 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12505 * Pre-screen address, if one is given the sin-len
12506 * must be set correctly!
12509 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12511 switch (raddr->sa.sa_family) {
12514 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12515 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12519 port = raddr->sin.sin_port;
12524 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12525 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12529 port = raddr->sin6.sin6_port;
12533 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12534 error = EAFNOSUPPORT;
12541 sinfo_flags = srcv->sinfo_flags;
12542 sinfo_assoc_id = srcv->sinfo_assoc_id;
12543 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12544 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12545 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12549 if (srcv->sinfo_flags)
12550 SCTP_STAT_INCR(sctps_sends_with_flags);
12552 sinfo_flags = inp->def_send.sinfo_flags;
12553 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12555 if (flags & MSG_EOR) {
12556 sinfo_flags |= SCTP_EOR;
12558 if (flags & MSG_EOF) {
12559 sinfo_flags |= SCTP_EOF;
12561 if (sinfo_flags & SCTP_SENDALL) {
12562 /* its a sendall */
12563 error = sctp_sendall(inp, uio, top, srcv);
12567 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12568 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12572 /* now we must find the assoc */
12573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12574 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12575 SCTP_INP_RLOCK(inp);
12576 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12578 SCTP_TCB_LOCK(stcb);
12581 SCTP_INP_RUNLOCK(inp);
12582 } else if (sinfo_assoc_id) {
12583 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12584 if (stcb != NULL) {
12589 * Since we did not use findep we must
12590 * increment it, and if we don't find a tcb
12593 SCTP_INP_WLOCK(inp);
12594 SCTP_INP_INCR_REF(inp);
12595 SCTP_INP_WUNLOCK(inp);
12596 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12597 if (stcb == NULL) {
12598 SCTP_INP_WLOCK(inp);
12599 SCTP_INP_DECR_REF(inp);
12600 SCTP_INP_WUNLOCK(inp);
12605 if ((stcb == NULL) && (addr)) {
12606 /* Possible implicit send? */
12607 SCTP_ASOC_CREATE_LOCK(inp);
12608 create_lock_applied = 1;
12609 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12610 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12611 /* Should I really unlock ? */
12612 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12616 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12617 (addr->sa_family == AF_INET6)) {
12618 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12622 SCTP_INP_WLOCK(inp);
12623 SCTP_INP_INCR_REF(inp);
12624 SCTP_INP_WUNLOCK(inp);
12625 /* With the lock applied look again */
12626 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12627 #if defined(INET) || defined(INET6)
12628 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12629 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12632 if (stcb == NULL) {
12633 SCTP_INP_WLOCK(inp);
12634 SCTP_INP_DECR_REF(inp);
12635 SCTP_INP_WUNLOCK(inp);
12642 if (t_inp != inp) {
12643 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12648 if (stcb == NULL) {
12649 if (addr == NULL) {
12650 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12654 /* We must go ahead and start the INIT process */
12657 if ((sinfo_flags & SCTP_ABORT) ||
12658 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12660 * User asks to abort a non-existant assoc,
12661 * or EOF a non-existant assoc with no data
12663 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12667 /* get an asoc/stcb struct */
12668 vrf_id = inp->def_vrf_id;
12670 if (create_lock_applied == 0) {
12671 panic("Error, should hold create lock and I don't?");
12674 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12675 inp->sctp_ep.pre_open_stream_count,
12678 SCTP_INITIALIZE_AUTH_PARAMS);
12679 if (stcb == NULL) {
12680 /* Error is setup for us in the call */
12683 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12684 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12686 * Set the connected flag so we can queue
12689 soisconnecting(so);
12692 if (create_lock_applied) {
12693 SCTP_ASOC_CREATE_UNLOCK(inp);
12694 create_lock_applied = 0;
12696 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12699 * Turn on queue only flag to prevent data from
12703 asoc = &stcb->asoc;
12704 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12705 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12708 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12709 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12710 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
12716 /* out with the INIT */
12717 queue_only_for_init = 1;
12719 * we may want to dig in after this call and adjust the MTU
12720 * value. It defaulted to 1500 (constant) but the ro
12721 * structure may now have an update and thus we may need to
12722 * change it BEFORE we append the message.
12726 asoc = &stcb->asoc;
12727 if (srcv == NULL) {
12728 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12729 sinfo_flags = srcv->sinfo_flags;
12730 if (flags & MSG_EOR) {
12731 sinfo_flags |= SCTP_EOR;
12733 if (flags & MSG_EOF) {
12734 sinfo_flags |= SCTP_EOF;
12737 if (sinfo_flags & SCTP_ADDR_OVER) {
12739 net = sctp_findnet(stcb, addr);
12742 if ((net == NULL) ||
12743 ((port != 0) && (port != stcb->rport))) {
12744 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12749 if (stcb->asoc.alternate) {
12750 net = stcb->asoc.alternate;
12752 net = stcb->asoc.primary_destination;
12755 atomic_add_int(&stcb->total_sends, 1);
12756 /* Keep the stcb from being freed under our feet */
12757 atomic_add_int(&asoc->refcnt, 1);
12758 free_cnt_applied = 1;
12760 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12761 if (sndlen > (ssize_t)asoc->smallest_mtu) {
12762 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12767 if (SCTP_SO_IS_NBIO(so)
12768 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12772 /* would we block? */
12773 if (non_blocking) {
12776 if (hold_tcblock == 0) {
12777 SCTP_TCB_LOCK(stcb);
12780 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12781 if (user_marks_eor == 0) {
12786 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12787 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12788 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12789 if (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so))
12792 error = EWOULDBLOCK;
12795 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12796 SCTP_TCB_UNLOCK(stcb);
12799 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12801 local_soresv = sndlen;
12802 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12803 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12804 error = ECONNRESET;
12807 if (create_lock_applied) {
12808 SCTP_ASOC_CREATE_UNLOCK(inp);
12809 create_lock_applied = 0;
12811 /* Is the stream no. valid? */
12812 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12813 /* Invalid stream number */
12814 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12818 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12819 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12821 * Can't queue any data while stream reset is underway.
12823 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12828 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12831 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12832 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12835 /* we are now done with all control */
12837 sctp_m_freem(control);
12840 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12841 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12842 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12843 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12844 if (sinfo_flags & SCTP_ABORT) {
12847 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12848 error = ECONNRESET;
12852 /* Ok, we will attempt a msgsnd :> */
12854 p->td_ru.ru_msgsnd++;
12856 /* Are we aborting? */
12857 if (sinfo_flags & SCTP_ABORT) {
12859 ssize_t tot_demand, tot_out = 0, max_out;
12861 SCTP_STAT_INCR(sctps_sends_with_abort);
12862 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12863 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12864 /* It has to be up before we abort */
12865 /* how big is the user initiated abort? */
12866 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12870 if (hold_tcblock) {
12871 SCTP_TCB_UNLOCK(stcb);
12875 struct mbuf *cntm = NULL;
12877 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12879 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12880 tot_out += SCTP_BUF_LEN(cntm);
12884 /* Must fit in a MTU */
12886 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12887 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12889 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12893 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12896 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12900 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12901 max_out -= sizeof(struct sctp_abort_msg);
12902 if (tot_out > max_out) {
12906 struct sctp_paramhdr *ph;
12908 /* now move forward the data pointer */
12909 ph = mtod(mm, struct sctp_paramhdr *);
12910 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12911 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12913 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
12915 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12918 * Here if we can't get his data we
12919 * still abort we just don't get to
12920 * send the users note :-0
12927 SCTP_BUF_NEXT(mm) = top;
12931 if (hold_tcblock == 0) {
12932 SCTP_TCB_LOCK(stcb);
12934 atomic_add_int(&stcb->asoc.refcnt, -1);
12935 free_cnt_applied = 0;
12936 /* release this lock, otherwise we hang on ourselves */
12937 NET_EPOCH_ENTER(et);
12938 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12939 NET_EPOCH_EXIT(et);
12940 /* now relock the stcb so everything is sane */
12944 * In this case top is already chained to mm avoid double
12945 * free, since we free it below if top != NULL and driver
12946 * would free it after sending the packet out
12953 /* Calculate the maximum we can send */
12954 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12955 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12956 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12960 if (hold_tcblock) {
12961 SCTP_TCB_UNLOCK(stcb);
12964 if (asoc->strmout == NULL) {
12965 /* huh? software error */
12966 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12971 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12972 if ((user_marks_eor == 0) &&
12973 (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12974 /* It will NEVER fit */
12975 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12979 if ((uio == NULL) && user_marks_eor) {
12981 * We do not support eeor mode for
12982 * sending with mbuf chains (like sendfile).
12984 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12989 if (user_marks_eor) {
12990 local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12993 * For non-eeor the whole message must fit in
12994 * the socket send buffer.
12996 local_add_more = sndlen;
12999 if (non_blocking) {
13000 goto skip_preblock;
13002 if (((max_len <= local_add_more) &&
13003 ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13005 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13006 /* No room right now ! */
13007 SOCKBUF_LOCK(&so->so_snd);
13008 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13009 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13010 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13011 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
13012 (unsigned int)SCTP_SB_LIMIT_SND(so),
13015 stcb->asoc.stream_queue_cnt,
13016 stcb->asoc.chunks_on_out_queue,
13017 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13019 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13022 stcb->block_entry = &be;
13023 error = sbwait(&so->so_snd);
13024 stcb->block_entry = NULL;
13025 if (error || so->so_error || be.error) {
13028 error = so->so_error;
13033 SOCKBUF_UNLOCK(&so->so_snd);
13036 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13037 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13038 asoc, stcb->asoc.total_output_queue_size);
13040 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13041 SOCKBUF_UNLOCK(&so->so_snd);
13044 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13046 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13047 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13051 SOCKBUF_UNLOCK(&so->so_snd);
13055 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13059 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13060 * case NOTE: uio will be null when top/mbuf is passed
13063 if (sinfo_flags & SCTP_EOF) {
13064 got_all_of_the_send = 1;
13067 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13073 struct sctp_stream_queue_pending *sp;
13074 struct sctp_stream_out *strm;
13077 SCTP_TCB_SEND_LOCK(stcb);
13078 if ((asoc->stream_locked) &&
13079 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13080 SCTP_TCB_SEND_UNLOCK(stcb);
13081 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13085 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13086 if (strm->last_msg_incomplete == 0) {
13088 SCTP_TCB_SEND_UNLOCK(stcb);
13089 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13093 SCTP_TCB_SEND_LOCK(stcb);
13094 if (sp->msg_is_complete) {
13095 strm->last_msg_incomplete = 0;
13096 asoc->stream_locked = 0;
13099 * Just got locked to this guy in case of an
13102 strm->last_msg_incomplete = 1;
13103 if (stcb->asoc.idata_supported == 0) {
13104 asoc->stream_locked = 1;
13105 asoc->stream_locked_on = srcv->sinfo_stream;
13107 sp->sender_all_done = 0;
13109 sctp_snd_sb_alloc(stcb, sp->length);
13110 atomic_add_int(&asoc->stream_queue_cnt, 1);
13111 if (sinfo_flags & SCTP_UNORDERED) {
13112 SCTP_STAT_INCR(sctps_sends_with_unord);
13114 sp->processing = 1;
13115 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13116 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13118 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13120 /* ???? Huh ??? last msg is gone */
13122 panic("Warning: Last msg marked incomplete, yet nothing left?");
13124 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13125 strm->last_msg_incomplete = 0;
13129 if (sp->processing) {
13130 SCTP_TCB_SEND_UNLOCK(stcb);
13131 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13135 sp->processing = 1;
13138 SCTP_TCB_SEND_UNLOCK(stcb);
13139 while (uio->uio_resid > 0) {
13140 /* How much room do we have? */
13141 struct mbuf *new_tail, *mm;
13143 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13144 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13145 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13149 if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13150 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13151 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13154 if (hold_tcblock) {
13155 SCTP_TCB_UNLOCK(stcb);
13158 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13159 if ((mm == NULL) || error) {
13163 SCTP_TCB_SEND_LOCK(stcb);
13165 sp->processing = 0;
13167 SCTP_TCB_SEND_UNLOCK(stcb);
13170 /* Update the mbuf and count */
13171 SCTP_TCB_SEND_LOCK(stcb);
13172 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13173 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13175 * we need to get out. Peer probably
13179 if (stcb->asoc.state & SCTP_STATE_WAS_ABORTED) {
13180 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13181 error = ECONNRESET;
13184 sp->processing = 0;
13186 SCTP_TCB_SEND_UNLOCK(stcb);
13189 if (sp->tail_mbuf) {
13190 /* tack it to the end */
13191 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13192 sp->tail_mbuf = new_tail;
13194 /* A stolen mbuf */
13196 sp->tail_mbuf = new_tail;
13198 sctp_snd_sb_alloc(stcb, sndout);
13199 atomic_add_int(&sp->length, sndout);
13201 if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13202 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13205 /* Did we reach EOR? */
13206 if ((uio->uio_resid == 0) &&
13207 ((user_marks_eor == 0) ||
13208 (sinfo_flags & SCTP_EOF) ||
13209 (user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
13210 sp->msg_is_complete = 1;
13212 sp->msg_is_complete = 0;
13214 SCTP_TCB_SEND_UNLOCK(stcb);
13216 if (uio->uio_resid == 0) {
13221 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13223 * This is ugly but we must assure locking
13226 if (hold_tcblock == 0) {
13227 SCTP_TCB_LOCK(stcb);
13230 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13231 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13232 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13233 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13239 SCTP_TCB_UNLOCK(stcb);
13242 /* wait for space now */
13243 if (non_blocking) {
13244 /* Non-blocking io in place out */
13245 SCTP_TCB_SEND_LOCK(stcb);
13247 sp->processing = 0;
13249 SCTP_TCB_SEND_UNLOCK(stcb);
13252 /* What about the INIT, send it maybe */
13253 if (queue_only_for_init) {
13254 if (hold_tcblock == 0) {
13255 SCTP_TCB_LOCK(stcb);
13258 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13259 /* a collision took us forward? */
13262 NET_EPOCH_ENTER(et);
13263 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13264 NET_EPOCH_EXIT(et);
13265 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13269 if ((net->flight_size > net->cwnd) &&
13270 (asoc->sctp_cmt_on_off == 0)) {
13271 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13273 } else if (asoc->ifp_had_enobuf) {
13274 SCTP_STAT_INCR(sctps_ifnomemqueued);
13275 if (net->flight_size > (2 * net->mtu)) {
13278 asoc->ifp_had_enobuf = 0;
13280 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13281 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13282 (stcb->asoc.total_flight > 0) &&
13283 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13284 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13286 * Ok, Nagle is set on and we have data outstanding.
13287 * Don't send anything and let SACKs drive out the
13288 * data unless we have a "full" segment to send.
13290 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13291 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13293 SCTP_STAT_INCR(sctps_naglequeued);
13296 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13297 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13298 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13300 SCTP_STAT_INCR(sctps_naglesent);
13303 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13304 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13305 nagle_applies, un_sent);
13306 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13307 stcb->asoc.total_flight,
13308 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13310 if (queue_only_for_init)
13311 queue_only_for_init = 0;
13312 if ((queue_only == 0) && (nagle_applies == 0)) {
13314 * need to start chunk output
13315 * before blocking.. note that if
13316 * a lock is already applied, then
13317 * the input via the net is happening
13318 * and I don't need to start output :-D
13320 NET_EPOCH_ENTER(et);
13321 if (hold_tcblock == 0) {
13322 if (SCTP_TCB_TRYLOCK(stcb)) {
13324 sctp_chunk_output(inp,
13326 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13329 sctp_chunk_output(inp,
13331 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13333 NET_EPOCH_EXIT(et);
13335 if (hold_tcblock == 1) {
13336 SCTP_TCB_UNLOCK(stcb);
13339 SOCKBUF_LOCK(&so->so_snd);
13341 * This is a bit strange, but I think it will
13342 * work. The total_output_queue_size is locked and
13343 * protected by the TCB_LOCK, which we just released.
13344 * There is a race that can occur between releasing it
13345 * above, and me getting the socket lock, where sacks
13346 * come in but we have not put the SB_WAIT on the
13347 * so_snd buffer to get the wakeup. After the LOCK
13348 * is applied the sack_processing will also need to
13349 * LOCK the so->so_snd to do the actual sowwakeup(). So
13350 * once we have the socket buffer lock if we recheck the
13351 * size we KNOW we will get to sleep safely with the
13352 * wakeup flag in place.
13354 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13355 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13356 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13357 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13358 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13359 asoc, uio->uio_resid);
13362 stcb->block_entry = &be;
13363 error = sbwait(&so->so_snd);
13364 stcb->block_entry = NULL;
13366 if (error || so->so_error || be.error) {
13369 error = so->so_error;
13374 SOCKBUF_UNLOCK(&so->so_snd);
13375 SCTP_TCB_SEND_LOCK(stcb);
13377 sp->processing = 0;
13379 SCTP_TCB_SEND_UNLOCK(stcb);
13383 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13384 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13385 asoc, stcb->asoc.total_output_queue_size);
13388 SOCKBUF_UNLOCK(&so->so_snd);
13389 SCTP_TCB_SEND_LOCK(stcb);
13390 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13392 sp->processing = 0;
13394 SCTP_TCB_SEND_UNLOCK(stcb);
13397 SCTP_TCB_SEND_UNLOCK(stcb);
13399 SCTP_TCB_SEND_LOCK(stcb);
13400 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13401 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13402 SCTP_TCB_SEND_UNLOCK(stcb);
13406 if (sp->msg_is_complete == 0) {
13407 strm->last_msg_incomplete = 1;
13408 if (stcb->asoc.idata_supported == 0) {
13409 asoc->stream_locked = 1;
13410 asoc->stream_locked_on = srcv->sinfo_stream;
13413 sp->sender_all_done = 1;
13414 strm->last_msg_incomplete = 0;
13415 asoc->stream_locked = 0;
13417 sp->processing = 0;
13419 SCTP_PRINTF("Huh no sp TSNH?\n");
13420 strm->last_msg_incomplete = 0;
13421 asoc->stream_locked = 0;
13423 SCTP_TCB_SEND_UNLOCK(stcb);
13424 if (uio->uio_resid == 0) {
13425 got_all_of_the_send = 1;
13428 /* We send in a 0, since we do NOT have any locks */
13429 error = sctp_msg_append(stcb, net, top, srcv, 0);
13431 if (sinfo_flags & SCTP_EOF) {
13432 got_all_of_the_send = 1;
13440 if ((sinfo_flags & SCTP_EOF) &&
13441 (got_all_of_the_send == 1)) {
13442 SCTP_STAT_INCR(sctps_sends_with_eof);
13444 if (hold_tcblock == 0) {
13445 SCTP_TCB_LOCK(stcb);
13448 if (TAILQ_EMPTY(&asoc->send_queue) &&
13449 TAILQ_EMPTY(&asoc->sent_queue) &&
13450 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13451 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13454 /* there is nothing queued to send, so I'm done... */
13455 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13456 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13457 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13458 struct sctp_nets *netp;
13460 /* only send SHUTDOWN the first time through */
13461 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13462 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13464 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13465 sctp_stop_timers_for_shutdown(stcb);
13466 if (stcb->asoc.alternate) {
13467 netp = stcb->asoc.alternate;
13469 netp = stcb->asoc.primary_destination;
13471 sctp_send_shutdown(stcb, netp);
13472 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13474 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13479 * we still got (or just got) data to send, so set
13483 * XXX sockets draft says that SCTP_EOF should be
13484 * sent with no data. currently, we will allow user
13485 * data to be sent first and move to
13488 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13489 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13490 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13491 if (hold_tcblock == 0) {
13492 SCTP_TCB_LOCK(stcb);
13495 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13496 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13498 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13499 if (TAILQ_EMPTY(&asoc->send_queue) &&
13500 TAILQ_EMPTY(&asoc->sent_queue) &&
13501 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13502 struct mbuf *op_err;
13503 char msg[SCTP_DIAG_INFO_LEN];
13506 if (free_cnt_applied) {
13507 atomic_add_int(&stcb->asoc.refcnt, -1);
13508 free_cnt_applied = 0;
13510 SCTP_SNPRINTF(msg, sizeof(msg),
13511 "%s:%d at %s", __FILE__, __LINE__, __func__);
13512 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13514 NET_EPOCH_ENTER(et);
13515 sctp_abort_an_association(stcb->sctp_ep, stcb,
13516 op_err, SCTP_SO_LOCKED);
13517 NET_EPOCH_EXIT(et);
13519 * now relock the stcb so everything
13526 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13528 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13533 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13534 some_on_control = 1;
13536 if (queue_only_for_init) {
13537 if (hold_tcblock == 0) {
13538 SCTP_TCB_LOCK(stcb);
13541 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13542 /* a collision took us forward? */
13545 NET_EPOCH_ENTER(et);
13546 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13547 NET_EPOCH_EXIT(et);
13548 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13552 if ((net->flight_size > net->cwnd) &&
13553 (stcb->asoc.sctp_cmt_on_off == 0)) {
13554 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13556 } else if (asoc->ifp_had_enobuf) {
13557 SCTP_STAT_INCR(sctps_ifnomemqueued);
13558 if (net->flight_size > (2 * net->mtu)) {
13561 asoc->ifp_had_enobuf = 0;
13563 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13564 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13565 (stcb->asoc.total_flight > 0) &&
13566 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13567 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13569 * Ok, Nagle is set on and we have data outstanding.
13570 * Don't send anything and let SACKs drive out the
13571 * data unless wen have a "full" segment to send.
13573 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13574 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13576 SCTP_STAT_INCR(sctps_naglequeued);
13579 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13580 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13581 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13583 SCTP_STAT_INCR(sctps_naglesent);
13586 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13587 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13588 nagle_applies, un_sent);
13589 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13590 stcb->asoc.total_flight,
13591 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13593 NET_EPOCH_ENTER(et);
13594 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13595 /* we can attempt to send too. */
13596 if (hold_tcblock == 0) {
13598 * If there is activity recv'ing sacks no need to
13601 if (SCTP_TCB_TRYLOCK(stcb)) {
13602 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13606 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13608 } else if ((queue_only == 0) &&
13609 (stcb->asoc.peers_rwnd == 0) &&
13610 (stcb->asoc.total_flight == 0)) {
13611 /* We get to have a probe outstanding */
13612 if (hold_tcblock == 0) {
13614 SCTP_TCB_LOCK(stcb);
13616 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13617 } else if (some_on_control) {
13618 int num_out, reason, frag_point;
13620 /* Here we do control only */
13621 if (hold_tcblock == 0) {
13623 SCTP_TCB_LOCK(stcb);
13625 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13626 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13627 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13629 NET_EPOCH_EXIT(et);
13630 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13631 queue_only, stcb->asoc.peers_rwnd, un_sent,
13632 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13633 stcb->asoc.total_output_queue_size, error);
13638 if (local_soresv && stcb) {
13639 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13641 if (create_lock_applied) {
13642 SCTP_ASOC_CREATE_UNLOCK(inp);
13644 if ((stcb) && hold_tcblock) {
13645 SCTP_TCB_UNLOCK(stcb);
13647 if (stcb && free_cnt_applied) {
13648 atomic_add_int(&stcb->asoc.refcnt, -1);
13652 if (mtx_owned(&stcb->tcb_mtx)) {
13653 panic("Leaving with tcb mtx owned?");
13655 if (mtx_owned(&stcb->tcb_send_mtx)) {
13656 panic("Leaving with tcb send mtx owned?");
13664 sctp_m_freem(control);
13670 * generate an AUTHentication chunk, if required
13673 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13674 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13675 struct sctp_tcb *stcb, uint8_t chunk)
13677 struct mbuf *m_auth;
13678 struct sctp_auth_chunk *auth;
13682 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13686 if (stcb->asoc.auth_supported == 0) {
13689 /* does the requested chunk require auth? */
13690 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13693 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13694 if (m_auth == NULL) {
13698 /* reserve some space if this will be the first mbuf */
13700 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13701 /* fill in the AUTH chunk details */
13702 auth = mtod(m_auth, struct sctp_auth_chunk *);
13703 memset(auth, 0, sizeof(*auth));
13704 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13705 auth->ch.chunk_flags = 0;
13706 chunk_len = sizeof(*auth) +
13707 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13708 auth->ch.chunk_length = htons(chunk_len);
13709 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13710 /* key id and hmac digest will be computed and filled in upon send */
13712 /* save the offset where the auth was inserted into the chain */
13714 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13715 *offset += SCTP_BUF_LEN(cn);
13718 /* update length and return pointer to the auth chunk */
13719 SCTP_BUF_LEN(m_auth) = chunk_len;
13720 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13721 if (auth_ret != NULL)
13729 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13731 struct nd_prefix *pfx = NULL;
13732 struct nd_pfxrouter *pfxrtr = NULL;
13733 struct sockaddr_in6 gw6;
13735 if (ro == NULL || ro->ro_nh == NULL || src6->sin6_family != AF_INET6)
13738 /* get prefix entry of address */
13740 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13741 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13743 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13744 &src6->sin6_addr, &pfx->ndpr_mask))
13747 /* no prefix entry in the prefix list */
13750 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13751 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13755 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13756 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13758 /* search installed gateway from prefix entry */
13759 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13760 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13761 gw6.sin6_family = AF_INET6;
13762 gw6.sin6_len = sizeof(struct sockaddr_in6);
13763 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13764 sizeof(struct in6_addr));
13765 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13766 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13767 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13768 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13769 if (sctp_cmpaddr((struct sockaddr *)&gw6, &ro->ro_nh->gw_sa)) {
13771 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13776 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13782 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13785 struct sockaddr_in *sin, *mask;
13786 struct ifaddr *ifa;
13787 struct in_addr srcnetaddr, gwnetaddr;
13789 if (ro == NULL || ro->ro_nh == NULL ||
13790 sifa->address.sa.sa_family != AF_INET) {
13793 ifa = (struct ifaddr *)sifa->ifa;
13794 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13795 sin = &sifa->address.sin;
13796 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13797 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13798 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13799 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13801 sin = &ro->ro_nh->gw4_sa;
13802 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13803 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13804 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13805 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13806 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {