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 #if defined(INET) || defined(INET6)
56 #include <netinet/udp.h>
58 #include <netinet/udp_var.h>
59 #include <machine/in_cksum.h>
60 #include <netinet/in_kdtrace.h>
64 #define SCTP_MAX_GAPS_INARRAY 4
66 uint8_t right_edge; /* mergable on the right edge */
67 uint8_t left_edge; /* mergable on the left edge */
70 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
73 const struct sack_track sack_array[256] = {
74 {0, 0, 0, 0, /* 0x00 */
81 {1, 0, 1, 0, /* 0x01 */
88 {0, 0, 1, 0, /* 0x02 */
95 {1, 0, 1, 0, /* 0x03 */
102 {0, 0, 1, 0, /* 0x04 */
109 {1, 0, 2, 0, /* 0x05 */
116 {0, 0, 1, 0, /* 0x06 */
123 {1, 0, 1, 0, /* 0x07 */
130 {0, 0, 1, 0, /* 0x08 */
137 {1, 0, 2, 0, /* 0x09 */
144 {0, 0, 2, 0, /* 0x0a */
151 {1, 0, 2, 0, /* 0x0b */
158 {0, 0, 1, 0, /* 0x0c */
165 {1, 0, 2, 0, /* 0x0d */
172 {0, 0, 1, 0, /* 0x0e */
179 {1, 0, 1, 0, /* 0x0f */
186 {0, 0, 1, 0, /* 0x10 */
193 {1, 0, 2, 0, /* 0x11 */
200 {0, 0, 2, 0, /* 0x12 */
207 {1, 0, 2, 0, /* 0x13 */
214 {0, 0, 2, 0, /* 0x14 */
221 {1, 0, 3, 0, /* 0x15 */
228 {0, 0, 2, 0, /* 0x16 */
235 {1, 0, 2, 0, /* 0x17 */
242 {0, 0, 1, 0, /* 0x18 */
249 {1, 0, 2, 0, /* 0x19 */
256 {0, 0, 2, 0, /* 0x1a */
263 {1, 0, 2, 0, /* 0x1b */
270 {0, 0, 1, 0, /* 0x1c */
277 {1, 0, 2, 0, /* 0x1d */
284 {0, 0, 1, 0, /* 0x1e */
291 {1, 0, 1, 0, /* 0x1f */
298 {0, 0, 1, 0, /* 0x20 */
305 {1, 0, 2, 0, /* 0x21 */
312 {0, 0, 2, 0, /* 0x22 */
319 {1, 0, 2, 0, /* 0x23 */
326 {0, 0, 2, 0, /* 0x24 */
333 {1, 0, 3, 0, /* 0x25 */
340 {0, 0, 2, 0, /* 0x26 */
347 {1, 0, 2, 0, /* 0x27 */
354 {0, 0, 2, 0, /* 0x28 */
361 {1, 0, 3, 0, /* 0x29 */
368 {0, 0, 3, 0, /* 0x2a */
375 {1, 0, 3, 0, /* 0x2b */
382 {0, 0, 2, 0, /* 0x2c */
389 {1, 0, 3, 0, /* 0x2d */
396 {0, 0, 2, 0, /* 0x2e */
403 {1, 0, 2, 0, /* 0x2f */
410 {0, 0, 1, 0, /* 0x30 */
417 {1, 0, 2, 0, /* 0x31 */
424 {0, 0, 2, 0, /* 0x32 */
431 {1, 0, 2, 0, /* 0x33 */
438 {0, 0, 2, 0, /* 0x34 */
445 {1, 0, 3, 0, /* 0x35 */
452 {0, 0, 2, 0, /* 0x36 */
459 {1, 0, 2, 0, /* 0x37 */
466 {0, 0, 1, 0, /* 0x38 */
473 {1, 0, 2, 0, /* 0x39 */
480 {0, 0, 2, 0, /* 0x3a */
487 {1, 0, 2, 0, /* 0x3b */
494 {0, 0, 1, 0, /* 0x3c */
501 {1, 0, 2, 0, /* 0x3d */
508 {0, 0, 1, 0, /* 0x3e */
515 {1, 0, 1, 0, /* 0x3f */
522 {0, 0, 1, 0, /* 0x40 */
529 {1, 0, 2, 0, /* 0x41 */
536 {0, 0, 2, 0, /* 0x42 */
543 {1, 0, 2, 0, /* 0x43 */
550 {0, 0, 2, 0, /* 0x44 */
557 {1, 0, 3, 0, /* 0x45 */
564 {0, 0, 2, 0, /* 0x46 */
571 {1, 0, 2, 0, /* 0x47 */
578 {0, 0, 2, 0, /* 0x48 */
585 {1, 0, 3, 0, /* 0x49 */
592 {0, 0, 3, 0, /* 0x4a */
599 {1, 0, 3, 0, /* 0x4b */
606 {0, 0, 2, 0, /* 0x4c */
613 {1, 0, 3, 0, /* 0x4d */
620 {0, 0, 2, 0, /* 0x4e */
627 {1, 0, 2, 0, /* 0x4f */
634 {0, 0, 2, 0, /* 0x50 */
641 {1, 0, 3, 0, /* 0x51 */
648 {0, 0, 3, 0, /* 0x52 */
655 {1, 0, 3, 0, /* 0x53 */
662 {0, 0, 3, 0, /* 0x54 */
669 {1, 0, 4, 0, /* 0x55 */
676 {0, 0, 3, 0, /* 0x56 */
683 {1, 0, 3, 0, /* 0x57 */
690 {0, 0, 2, 0, /* 0x58 */
697 {1, 0, 3, 0, /* 0x59 */
704 {0, 0, 3, 0, /* 0x5a */
711 {1, 0, 3, 0, /* 0x5b */
718 {0, 0, 2, 0, /* 0x5c */
725 {1, 0, 3, 0, /* 0x5d */
732 {0, 0, 2, 0, /* 0x5e */
739 {1, 0, 2, 0, /* 0x5f */
746 {0, 0, 1, 0, /* 0x60 */
753 {1, 0, 2, 0, /* 0x61 */
760 {0, 0, 2, 0, /* 0x62 */
767 {1, 0, 2, 0, /* 0x63 */
774 {0, 0, 2, 0, /* 0x64 */
781 {1, 0, 3, 0, /* 0x65 */
788 {0, 0, 2, 0, /* 0x66 */
795 {1, 0, 2, 0, /* 0x67 */
802 {0, 0, 2, 0, /* 0x68 */
809 {1, 0, 3, 0, /* 0x69 */
816 {0, 0, 3, 0, /* 0x6a */
823 {1, 0, 3, 0, /* 0x6b */
830 {0, 0, 2, 0, /* 0x6c */
837 {1, 0, 3, 0, /* 0x6d */
844 {0, 0, 2, 0, /* 0x6e */
851 {1, 0, 2, 0, /* 0x6f */
858 {0, 0, 1, 0, /* 0x70 */
865 {1, 0, 2, 0, /* 0x71 */
872 {0, 0, 2, 0, /* 0x72 */
879 {1, 0, 2, 0, /* 0x73 */
886 {0, 0, 2, 0, /* 0x74 */
893 {1, 0, 3, 0, /* 0x75 */
900 {0, 0, 2, 0, /* 0x76 */
907 {1, 0, 2, 0, /* 0x77 */
914 {0, 0, 1, 0, /* 0x78 */
921 {1, 0, 2, 0, /* 0x79 */
928 {0, 0, 2, 0, /* 0x7a */
935 {1, 0, 2, 0, /* 0x7b */
942 {0, 0, 1, 0, /* 0x7c */
949 {1, 0, 2, 0, /* 0x7d */
956 {0, 0, 1, 0, /* 0x7e */
963 {1, 0, 1, 0, /* 0x7f */
970 {0, 1, 1, 0, /* 0x80 */
977 {1, 1, 2, 0, /* 0x81 */
984 {0, 1, 2, 0, /* 0x82 */
991 {1, 1, 2, 0, /* 0x83 */
998 {0, 1, 2, 0, /* 0x84 */
1005 {1, 1, 3, 0, /* 0x85 */
1012 {0, 1, 2, 0, /* 0x86 */
1019 {1, 1, 2, 0, /* 0x87 */
1026 {0, 1, 2, 0, /* 0x88 */
1033 {1, 1, 3, 0, /* 0x89 */
1040 {0, 1, 3, 0, /* 0x8a */
1047 {1, 1, 3, 0, /* 0x8b */
1054 {0, 1, 2, 0, /* 0x8c */
1061 {1, 1, 3, 0, /* 0x8d */
1068 {0, 1, 2, 0, /* 0x8e */
1075 {1, 1, 2, 0, /* 0x8f */
1082 {0, 1, 2, 0, /* 0x90 */
1089 {1, 1, 3, 0, /* 0x91 */
1096 {0, 1, 3, 0, /* 0x92 */
1103 {1, 1, 3, 0, /* 0x93 */
1110 {0, 1, 3, 0, /* 0x94 */
1117 {1, 1, 4, 0, /* 0x95 */
1124 {0, 1, 3, 0, /* 0x96 */
1131 {1, 1, 3, 0, /* 0x97 */
1138 {0, 1, 2, 0, /* 0x98 */
1145 {1, 1, 3, 0, /* 0x99 */
1152 {0, 1, 3, 0, /* 0x9a */
1159 {1, 1, 3, 0, /* 0x9b */
1166 {0, 1, 2, 0, /* 0x9c */
1173 {1, 1, 3, 0, /* 0x9d */
1180 {0, 1, 2, 0, /* 0x9e */
1187 {1, 1, 2, 0, /* 0x9f */
1194 {0, 1, 2, 0, /* 0xa0 */
1201 {1, 1, 3, 0, /* 0xa1 */
1208 {0, 1, 3, 0, /* 0xa2 */
1215 {1, 1, 3, 0, /* 0xa3 */
1222 {0, 1, 3, 0, /* 0xa4 */
1229 {1, 1, 4, 0, /* 0xa5 */
1236 {0, 1, 3, 0, /* 0xa6 */
1243 {1, 1, 3, 0, /* 0xa7 */
1250 {0, 1, 3, 0, /* 0xa8 */
1257 {1, 1, 4, 0, /* 0xa9 */
1264 {0, 1, 4, 0, /* 0xaa */
1271 {1, 1, 4, 0, /* 0xab */
1278 {0, 1, 3, 0, /* 0xac */
1285 {1, 1, 4, 0, /* 0xad */
1292 {0, 1, 3, 0, /* 0xae */
1299 {1, 1, 3, 0, /* 0xaf */
1306 {0, 1, 2, 0, /* 0xb0 */
1313 {1, 1, 3, 0, /* 0xb1 */
1320 {0, 1, 3, 0, /* 0xb2 */
1327 {1, 1, 3, 0, /* 0xb3 */
1334 {0, 1, 3, 0, /* 0xb4 */
1341 {1, 1, 4, 0, /* 0xb5 */
1348 {0, 1, 3, 0, /* 0xb6 */
1355 {1, 1, 3, 0, /* 0xb7 */
1362 {0, 1, 2, 0, /* 0xb8 */
1369 {1, 1, 3, 0, /* 0xb9 */
1376 {0, 1, 3, 0, /* 0xba */
1383 {1, 1, 3, 0, /* 0xbb */
1390 {0, 1, 2, 0, /* 0xbc */
1397 {1, 1, 3, 0, /* 0xbd */
1404 {0, 1, 2, 0, /* 0xbe */
1411 {1, 1, 2, 0, /* 0xbf */
1418 {0, 1, 1, 0, /* 0xc0 */
1425 {1, 1, 2, 0, /* 0xc1 */
1432 {0, 1, 2, 0, /* 0xc2 */
1439 {1, 1, 2, 0, /* 0xc3 */
1446 {0, 1, 2, 0, /* 0xc4 */
1453 {1, 1, 3, 0, /* 0xc5 */
1460 {0, 1, 2, 0, /* 0xc6 */
1467 {1, 1, 2, 0, /* 0xc7 */
1474 {0, 1, 2, 0, /* 0xc8 */
1481 {1, 1, 3, 0, /* 0xc9 */
1488 {0, 1, 3, 0, /* 0xca */
1495 {1, 1, 3, 0, /* 0xcb */
1502 {0, 1, 2, 0, /* 0xcc */
1509 {1, 1, 3, 0, /* 0xcd */
1516 {0, 1, 2, 0, /* 0xce */
1523 {1, 1, 2, 0, /* 0xcf */
1530 {0, 1, 2, 0, /* 0xd0 */
1537 {1, 1, 3, 0, /* 0xd1 */
1544 {0, 1, 3, 0, /* 0xd2 */
1551 {1, 1, 3, 0, /* 0xd3 */
1558 {0, 1, 3, 0, /* 0xd4 */
1565 {1, 1, 4, 0, /* 0xd5 */
1572 {0, 1, 3, 0, /* 0xd6 */
1579 {1, 1, 3, 0, /* 0xd7 */
1586 {0, 1, 2, 0, /* 0xd8 */
1593 {1, 1, 3, 0, /* 0xd9 */
1600 {0, 1, 3, 0, /* 0xda */
1607 {1, 1, 3, 0, /* 0xdb */
1614 {0, 1, 2, 0, /* 0xdc */
1621 {1, 1, 3, 0, /* 0xdd */
1628 {0, 1, 2, 0, /* 0xde */
1635 {1, 1, 2, 0, /* 0xdf */
1642 {0, 1, 1, 0, /* 0xe0 */
1649 {1, 1, 2, 0, /* 0xe1 */
1656 {0, 1, 2, 0, /* 0xe2 */
1663 {1, 1, 2, 0, /* 0xe3 */
1670 {0, 1, 2, 0, /* 0xe4 */
1677 {1, 1, 3, 0, /* 0xe5 */
1684 {0, 1, 2, 0, /* 0xe6 */
1691 {1, 1, 2, 0, /* 0xe7 */
1698 {0, 1, 2, 0, /* 0xe8 */
1705 {1, 1, 3, 0, /* 0xe9 */
1712 {0, 1, 3, 0, /* 0xea */
1719 {1, 1, 3, 0, /* 0xeb */
1726 {0, 1, 2, 0, /* 0xec */
1733 {1, 1, 3, 0, /* 0xed */
1740 {0, 1, 2, 0, /* 0xee */
1747 {1, 1, 2, 0, /* 0xef */
1754 {0, 1, 1, 0, /* 0xf0 */
1761 {1, 1, 2, 0, /* 0xf1 */
1768 {0, 1, 2, 0, /* 0xf2 */
1775 {1, 1, 2, 0, /* 0xf3 */
1782 {0, 1, 2, 0, /* 0xf4 */
1789 {1, 1, 3, 0, /* 0xf5 */
1796 {0, 1, 2, 0, /* 0xf6 */
1803 {1, 1, 2, 0, /* 0xf7 */
1810 {0, 1, 1, 0, /* 0xf8 */
1817 {1, 1, 2, 0, /* 0xf9 */
1824 {0, 1, 2, 0, /* 0xfa */
1831 {1, 1, 2, 0, /* 0xfb */
1838 {0, 1, 1, 0, /* 0xfc */
1845 {1, 1, 2, 0, /* 0xfd */
1852 {0, 1, 1, 0, /* 0xfe */
1859 {1, 1, 1, 0, /* 0xff */
1870 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1871 struct sctp_scoping *scope,
1874 if ((scope->loopback_scope == 0) &&
1875 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1877 * skip loopback if not in scope *
1881 switch (ifa->address.sa.sa_family) {
1884 if (scope->ipv4_addr_legal) {
1885 struct sockaddr_in *sin;
1887 sin = &ifa->address.sin;
1888 if (sin->sin_addr.s_addr == 0) {
1889 /* not in scope , unspecified */
1892 if ((scope->ipv4_local_scope == 0) &&
1893 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1894 /* private address not in scope */
1904 if (scope->ipv6_addr_legal) {
1905 struct sockaddr_in6 *sin6;
1908 * Must update the flags, bummer, which means any
1909 * IFA locks must now be applied HERE <->
1912 sctp_gather_internal_ifa_flags(ifa);
1914 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1917 /* ok to use deprecated addresses? */
1918 sin6 = &ifa->address.sin6;
1919 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1920 /* skip unspecifed addresses */
1923 if ( /* (local_scope == 0) && */
1924 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1927 if ((scope->site_scope == 0) &&
1928 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1942 static struct mbuf *
1943 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
1945 #if defined(INET) || defined(INET6)
1946 struct sctp_paramhdr *paramh;
1951 switch (ifa->address.sa.sa_family) {
1954 plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
1959 plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
1965 #if defined(INET) || defined(INET6)
1966 if (M_TRAILINGSPACE(m) >= plen) {
1967 /* easy side we just drop it on the end */
1968 paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1971 /* Need more space */
1973 while (SCTP_BUF_NEXT(mret) != NULL) {
1974 mret = SCTP_BUF_NEXT(mret);
1976 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1977 if (SCTP_BUF_NEXT(mret) == NULL) {
1978 /* We are hosed, can't add more addresses */
1981 mret = SCTP_BUF_NEXT(mret);
1982 paramh = mtod(mret, struct sctp_paramhdr *);
1984 /* now add the parameter */
1985 switch (ifa->address.sa.sa_family) {
1989 struct sctp_ipv4addr_param *ipv4p;
1990 struct sockaddr_in *sin;
1992 sin = &ifa->address.sin;
1993 ipv4p = (struct sctp_ipv4addr_param *)paramh;
1994 paramh->param_type = htons(SCTP_IPV4_ADDRESS);
1995 paramh->param_length = htons(plen);
1996 ipv4p->addr = sin->sin_addr.s_addr;
1997 SCTP_BUF_LEN(mret) += plen;
2004 struct sctp_ipv6addr_param *ipv6p;
2005 struct sockaddr_in6 *sin6;
2007 sin6 = &ifa->address.sin6;
2008 ipv6p = (struct sctp_ipv6addr_param *)paramh;
2009 paramh->param_type = htons(SCTP_IPV6_ADDRESS);
2010 paramh->param_length = htons(plen);
2011 memcpy(ipv6p->addr, &sin6->sin6_addr,
2012 sizeof(ipv6p->addr));
2013 /* clear embedded scope in the address */
2014 in6_clearscope((struct in6_addr *)ipv6p->addr);
2015 SCTP_BUF_LEN(mret) += plen;
2031 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2032 struct sctp_scoping *scope,
2033 struct mbuf *m_at, int cnt_inits_to,
2034 uint16_t *padding_len, uint16_t *chunk_len)
2036 struct sctp_vrf *vrf = NULL;
2037 int cnt, limit_out = 0, total_count;
2040 vrf_id = inp->def_vrf_id;
2041 SCTP_IPI_ADDR_RLOCK();
2042 vrf = sctp_find_vrf(vrf_id);
2044 SCTP_IPI_ADDR_RUNLOCK();
2047 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2048 struct sctp_ifa *sctp_ifap;
2049 struct sctp_ifn *sctp_ifnp;
2052 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2054 cnt = SCTP_ADDRESS_LIMIT;
2057 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2058 if ((scope->loopback_scope == 0) &&
2059 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2061 * Skip loopback devices if loopback_scope
2066 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2068 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2069 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2070 &sctp_ifap->address.sin.sin_addr) != 0)) {
2075 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2076 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2077 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2081 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2084 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2088 if (cnt > SCTP_ADDRESS_LIMIT) {
2092 if (cnt > SCTP_ADDRESS_LIMIT) {
2099 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2101 if ((scope->loopback_scope == 0) &&
2102 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2104 * Skip loopback devices if
2105 * loopback_scope not set
2109 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2111 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2112 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2113 &sctp_ifap->address.sin.sin_addr) != 0)) {
2118 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2119 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2120 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2124 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2127 if (sctp_is_address_in_scope(sctp_ifap,
2131 if ((chunk_len != NULL) &&
2132 (padding_len != NULL) &&
2133 (*padding_len > 0)) {
2134 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2135 SCTP_BUF_LEN(m_at) += *padding_len;
2136 *chunk_len += *padding_len;
2139 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2150 if (total_count > SCTP_ADDRESS_LIMIT) {
2151 /* No more addresses */
2159 struct sctp_laddr *laddr;
2162 /* First, how many ? */
2163 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2164 if (laddr->ifa == NULL) {
2167 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2169 * Address being deleted by the system, dont
2173 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2175 * Address being deleted on this ep don't
2180 if (sctp_is_address_in_scope(laddr->ifa,
2187 * To get through a NAT we only list addresses if we have
2188 * more than one. That way if you just bind a single address
2189 * we let the source of the init dictate our address.
2193 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2194 if (laddr->ifa == NULL) {
2197 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2200 if (sctp_is_address_in_scope(laddr->ifa,
2204 if ((chunk_len != NULL) &&
2205 (padding_len != NULL) &&
2206 (*padding_len > 0)) {
2207 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2208 SCTP_BUF_LEN(m_at) += *padding_len;
2209 *chunk_len += *padding_len;
2212 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2214 if (cnt >= SCTP_ADDRESS_LIMIT) {
2220 SCTP_IPI_ADDR_RUNLOCK();
2224 static struct sctp_ifa *
2225 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2226 uint8_t dest_is_loop,
2227 uint8_t dest_is_priv,
2230 uint8_t dest_is_global = 0;
2232 /* dest_is_priv is true if destination is a private address */
2233 /* dest_is_loop is true if destination is a loopback addresses */
2236 * Here we determine if its a preferred address. A preferred address
2237 * means it is the same scope or higher scope then the destination.
2238 * L = loopback, P = private, G = global
2239 * -----------------------------------------
2240 * src | dest | result
2241 * ----------------------------------------
2243 * -----------------------------------------
2244 * P | L | yes-v4 no-v6
2245 * -----------------------------------------
2246 * G | L | yes-v4 no-v6
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2257 * -----------------------------------------
2259 * -----------------------------------------
2262 if (ifa->address.sa.sa_family != fam) {
2263 /* forget mis-matched family */
2266 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2269 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2270 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2271 /* Ok the address may be ok */
2273 if (fam == AF_INET6) {
2274 /* ok to use deprecated addresses? no lets not! */
2275 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2276 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2279 if (ifa->src_is_priv && !ifa->src_is_loop) {
2281 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2285 if (ifa->src_is_glob) {
2287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2294 * Now that we know what is what, implement or table this could in
2295 * theory be done slicker (it used to be), but this is
2296 * straightforward and easier to validate :-)
2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2299 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2300 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2301 dest_is_loop, dest_is_priv, dest_is_global);
2303 if ((ifa->src_is_loop) && (dest_is_priv)) {
2304 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2307 if ((ifa->src_is_glob) && (dest_is_priv)) {
2308 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2311 if ((ifa->src_is_loop) && (dest_is_global)) {
2312 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2315 if ((ifa->src_is_priv) && (dest_is_global)) {
2316 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2319 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2320 /* its a preferred address */
2324 static struct sctp_ifa *
2325 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2326 uint8_t dest_is_loop,
2327 uint8_t dest_is_priv,
2330 uint8_t dest_is_global = 0;
2333 * Here we determine if its a acceptable address. A acceptable
2334 * address means it is the same scope or higher scope but we can
2335 * allow for NAT which means its ok to have a global dest and a
2338 * L = loopback, P = private, G = global
2339 * -----------------------------------------
2340 * src | dest | result
2341 * -----------------------------------------
2343 * -----------------------------------------
2344 * P | L | yes-v4 no-v6
2345 * -----------------------------------------
2347 * -----------------------------------------
2349 * -----------------------------------------
2351 * -----------------------------------------
2352 * G | P | yes - May not work
2353 * -----------------------------------------
2355 * -----------------------------------------
2356 * P | G | yes - May not work
2357 * -----------------------------------------
2359 * -----------------------------------------
2362 if (ifa->address.sa.sa_family != fam) {
2363 /* forget non matching family */
2364 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2365 ifa->address.sa.sa_family, fam);
2368 /* Ok the address may be ok */
2369 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2370 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2371 dest_is_loop, dest_is_priv);
2372 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2376 if (fam == AF_INET6) {
2377 /* ok to use deprecated addresses? */
2378 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2381 if (ifa->src_is_priv) {
2382 /* Special case, linklocal to loop */
2389 * Now that we know what is what, implement our table. This could in
2390 * theory be done slicker (it used to be), but this is
2391 * straightforward and easier to validate :-)
2393 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2396 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2399 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2402 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2405 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2406 /* its an acceptable address */
2411 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2413 struct sctp_laddr *laddr;
2416 /* There are no restrictions, no TCB :-) */
2419 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2420 if (laddr->ifa == NULL) {
2421 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2425 if (laddr->ifa == ifa) {
2426 /* Yes it is on the list */
2435 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2437 struct sctp_laddr *laddr;
2441 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2442 if (laddr->ifa == NULL) {
2443 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2447 if ((laddr->ifa == ifa) && laddr->action == 0)
2456 static struct sctp_ifa *
2457 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2460 int non_asoc_addr_ok,
2461 uint8_t dest_is_priv,
2462 uint8_t dest_is_loop,
2465 struct sctp_laddr *laddr, *starting_point;
2468 struct sctp_ifn *sctp_ifn;
2469 struct sctp_ifa *sctp_ifa, *sifa;
2470 struct sctp_vrf *vrf;
2473 vrf = sctp_find_vrf(vrf_id);
2477 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2478 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2479 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2481 * first question, is the ifn we will emit on in our list, if so, we
2482 * want such an address. Note that we first looked for a preferred
2486 /* is a preferred one on the interface we route out? */
2487 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2489 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2490 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2491 &sctp_ifa->address.sin.sin_addr) != 0)) {
2496 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2497 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2498 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2502 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2503 (non_asoc_addr_ok == 0))
2505 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2510 if (sctp_is_addr_in_ep(inp, sifa)) {
2511 atomic_add_int(&sifa->refcount, 1);
2517 * ok, now we now need to find one on the list of the addresses. We
2518 * can't get one on the emitting interface so let's find first a
2519 * preferred one. If not that an acceptable one otherwise... we
2522 starting_point = inp->next_addr_touse;
2524 if (inp->next_addr_touse == NULL) {
2525 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2528 for (laddr = inp->next_addr_touse; laddr;
2529 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2530 if (laddr->ifa == NULL) {
2531 /* address has been removed */
2534 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2535 /* address is being deleted */
2538 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2542 atomic_add_int(&sifa->refcount, 1);
2545 if (resettotop == 0) {
2546 inp->next_addr_touse = NULL;
2550 inp->next_addr_touse = starting_point;
2553 if (inp->next_addr_touse == NULL) {
2554 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2558 /* ok, what about an acceptable address in the inp */
2559 for (laddr = inp->next_addr_touse; laddr;
2560 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2561 if (laddr->ifa == NULL) {
2562 /* address has been removed */
2565 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2566 /* address is being deleted */
2569 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2573 atomic_add_int(&sifa->refcount, 1);
2576 if (resettotop == 0) {
2577 inp->next_addr_touse = NULL;
2578 goto once_again_too;
2582 * no address bound can be a source for the destination we are in
2590 static struct sctp_ifa *
2591 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2592 struct sctp_tcb *stcb,
2595 uint8_t dest_is_priv,
2596 uint8_t dest_is_loop,
2597 int non_asoc_addr_ok,
2600 struct sctp_laddr *laddr, *starting_point;
2602 struct sctp_ifn *sctp_ifn;
2603 struct sctp_ifa *sctp_ifa, *sifa;
2604 uint8_t start_at_beginning = 0;
2605 struct sctp_vrf *vrf;
2609 * first question, is the ifn we will emit on in our list, if so, we
2612 vrf = sctp_find_vrf(vrf_id);
2616 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2617 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2618 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2621 * first question, is the ifn we will emit on in our list? If so,
2622 * we want that one. First we look for a preferred. Second, we go
2623 * for an acceptable.
2626 /* first try for a preferred address on the ep */
2627 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2629 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2630 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2631 &sctp_ifa->address.sin.sin_addr) != 0)) {
2636 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2637 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2638 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2642 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2644 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2645 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2648 if (((non_asoc_addr_ok == 0) &&
2649 (sctp_is_addr_restricted(stcb, sifa))) ||
2650 (non_asoc_addr_ok &&
2651 (sctp_is_addr_restricted(stcb, sifa)) &&
2652 (!sctp_is_addr_pending(stcb, sifa)))) {
2653 /* on the no-no list */
2656 atomic_add_int(&sifa->refcount, 1);
2660 /* next try for an acceptable address on the ep */
2661 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2663 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2664 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2665 &sctp_ifa->address.sin.sin_addr) != 0)) {
2670 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2671 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2672 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2676 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2678 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2679 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2682 if (((non_asoc_addr_ok == 0) &&
2683 (sctp_is_addr_restricted(stcb, sifa))) ||
2684 (non_asoc_addr_ok &&
2685 (sctp_is_addr_restricted(stcb, sifa)) &&
2686 (!sctp_is_addr_pending(stcb, sifa)))) {
2687 /* on the no-no list */
2690 atomic_add_int(&sifa->refcount, 1);
2697 * if we can't find one like that then we must look at all addresses
2698 * bound to pick one at first preferable then secondly acceptable.
2700 starting_point = stcb->asoc.last_used_address;
2702 if (stcb->asoc.last_used_address == NULL) {
2703 start_at_beginning = 1;
2704 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2706 /* search beginning with the last used address */
2707 for (laddr = stcb->asoc.last_used_address; laddr;
2708 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2709 if (laddr->ifa == NULL) {
2710 /* address has been removed */
2713 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2714 /* address is being deleted */
2717 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2720 if (((non_asoc_addr_ok == 0) &&
2721 (sctp_is_addr_restricted(stcb, sifa))) ||
2722 (non_asoc_addr_ok &&
2723 (sctp_is_addr_restricted(stcb, sifa)) &&
2724 (!sctp_is_addr_pending(stcb, sifa)))) {
2725 /* on the no-no list */
2728 stcb->asoc.last_used_address = laddr;
2729 atomic_add_int(&sifa->refcount, 1);
2732 if (start_at_beginning == 0) {
2733 stcb->asoc.last_used_address = NULL;
2734 goto sctp_from_the_top;
2736 /* now try for any higher scope than the destination */
2737 stcb->asoc.last_used_address = starting_point;
2738 start_at_beginning = 0;
2740 if (stcb->asoc.last_used_address == NULL) {
2741 start_at_beginning = 1;
2742 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2744 /* search beginning with the last used address */
2745 for (laddr = stcb->asoc.last_used_address; laddr;
2746 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2747 if (laddr->ifa == NULL) {
2748 /* address has been removed */
2751 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2752 /* address is being deleted */
2755 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2759 if (((non_asoc_addr_ok == 0) &&
2760 (sctp_is_addr_restricted(stcb, sifa))) ||
2761 (non_asoc_addr_ok &&
2762 (sctp_is_addr_restricted(stcb, sifa)) &&
2763 (!sctp_is_addr_pending(stcb, sifa)))) {
2764 /* on the no-no list */
2767 stcb->asoc.last_used_address = laddr;
2768 atomic_add_int(&sifa->refcount, 1);
2771 if (start_at_beginning == 0) {
2772 stcb->asoc.last_used_address = NULL;
2773 goto sctp_from_the_top2;
2778 static struct sctp_ifa *
2779 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2780 struct sctp_inpcb *inp,
2781 struct sctp_tcb *stcb,
2782 int non_asoc_addr_ok,
2783 uint8_t dest_is_loop,
2784 uint8_t dest_is_priv,
2790 struct sctp_ifa *ifa, *sifa;
2791 int num_eligible_addr = 0;
2793 struct sockaddr_in6 sin6, lsa6;
2795 if (fam == AF_INET6) {
2796 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2797 (void)sa6_recoverscope(&sin6);
2800 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2802 if ((ifa->address.sa.sa_family == AF_INET) &&
2803 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2804 &ifa->address.sin.sin_addr) != 0)) {
2809 if ((ifa->address.sa.sa_family == AF_INET6) &&
2810 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2811 &ifa->address.sin6.sin6_addr) != 0)) {
2815 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2816 (non_asoc_addr_ok == 0))
2818 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2823 if (fam == AF_INET6 &&
2825 sifa->src_is_loop && sifa->src_is_priv) {
2827 * don't allow fe80::1 to be a src on loop ::1, we
2828 * don't list it to the peer so we will get an
2833 if (fam == AF_INET6 &&
2834 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2835 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2837 * link-local <-> link-local must belong to the same
2840 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2841 (void)sa6_recoverscope(&lsa6);
2842 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2849 * Check if the IPv6 address matches to next-hop. In the
2850 * mobile case, old IPv6 address may be not deleted from the
2851 * interface. Then, the interface has previous and new
2852 * addresses. We should use one corresponding to the
2853 * next-hop. (by micchie)
2856 if (stcb && fam == AF_INET6 &&
2857 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2858 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2865 /* Avoid topologically incorrect IPv4 address */
2866 if (stcb && fam == AF_INET &&
2867 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2868 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2874 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2877 if (((non_asoc_addr_ok == 0) &&
2878 (sctp_is_addr_restricted(stcb, sifa))) ||
2879 (non_asoc_addr_ok &&
2880 (sctp_is_addr_restricted(stcb, sifa)) &&
2881 (!sctp_is_addr_pending(stcb, sifa)))) {
2883 * It is restricted for some reason..
2884 * probably not yet added.
2889 if (num_eligible_addr >= addr_wanted) {
2892 num_eligible_addr++;
2899 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2900 struct sctp_inpcb *inp,
2901 struct sctp_tcb *stcb,
2902 int non_asoc_addr_ok,
2903 uint8_t dest_is_loop,
2904 uint8_t dest_is_priv,
2907 struct sctp_ifa *ifa, *sifa;
2908 int num_eligible_addr = 0;
2910 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2912 if ((ifa->address.sa.sa_family == AF_INET) &&
2913 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2914 &ifa->address.sin.sin_addr) != 0)) {
2919 if ((ifa->address.sa.sa_family == AF_INET6) &&
2921 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2922 &ifa->address.sin6.sin6_addr) != 0)) {
2926 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2927 (non_asoc_addr_ok == 0)) {
2930 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2936 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2939 if (((non_asoc_addr_ok == 0) &&
2940 (sctp_is_addr_restricted(stcb, sifa))) ||
2941 (non_asoc_addr_ok &&
2942 (sctp_is_addr_restricted(stcb, sifa)) &&
2943 (!sctp_is_addr_pending(stcb, sifa)))) {
2945 * It is restricted for some reason..
2946 * probably not yet added.
2951 num_eligible_addr++;
2953 return (num_eligible_addr);
2956 static struct sctp_ifa *
2957 sctp_choose_boundall(struct sctp_inpcb *inp,
2958 struct sctp_tcb *stcb,
2959 struct sctp_nets *net,
2962 uint8_t dest_is_priv,
2963 uint8_t dest_is_loop,
2964 int non_asoc_addr_ok,
2967 int cur_addr_num = 0, num_preferred = 0;
2969 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2970 struct sctp_ifa *sctp_ifa, *sifa;
2972 struct sctp_vrf *vrf;
2978 * For boundall we can use any address in the association.
2979 * If non_asoc_addr_ok is set we can use any address (at least in
2980 * theory). So we look for preferred addresses first. If we find one,
2981 * we use it. Otherwise we next try to get an address on the
2982 * interface, which we should be able to do (unless non_asoc_addr_ok
2983 * is false and we are routed out that way). In these cases where we
2984 * can't use the address of the interface we go through all the
2985 * ifn's looking for an address we can use and fill that in. Punting
2986 * means we send back address 0, which will probably cause problems
2987 * actually since then IP will fill in the address of the route ifn,
2988 * which means we probably already rejected it.. i.e. here comes an
2991 vrf = sctp_find_vrf(vrf_id);
2995 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2996 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2997 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2998 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2999 if (sctp_ifn == NULL) {
3000 /* ?? We don't have this guy ?? */
3001 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
3002 goto bound_all_plan_b;
3004 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3005 ifn_index, sctp_ifn->ifn_name);
3008 cur_addr_num = net->indx_of_eligible_next_to_use;
3010 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3015 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3016 num_preferred, sctp_ifn->ifn_name);
3017 if (num_preferred == 0) {
3019 * no eligible addresses, we must use some other interface
3020 * address if we can find one.
3022 goto bound_all_plan_b;
3025 * Ok we have num_eligible_addr set with how many we can use, this
3026 * may vary from call to call due to addresses being deprecated
3029 if (cur_addr_num >= num_preferred) {
3033 * select the nth address from the list (where cur_addr_num is the
3034 * nth) and 0 is the first one, 1 is the second one etc...
3036 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3038 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3039 dest_is_priv, cur_addr_num, fam, ro);
3041 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3043 atomic_add_int(&sctp_ifa->refcount, 1);
3045 /* save off where the next one we will want */
3046 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3051 * plan_b: Look at all interfaces and find a preferred address. If
3052 * no preferred fall through to plan_c.
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3056 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3057 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3058 sctp_ifn->ifn_name);
3059 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3060 /* wrong base scope */
3061 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3064 if ((sctp_ifn == looked_at) && looked_at) {
3065 /* already looked at this guy */
3066 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3069 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3070 dest_is_loop, dest_is_priv, fam);
3071 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3072 "Found ifn:%p %d preferred source addresses\n",
3073 ifn, num_preferred);
3074 if (num_preferred == 0) {
3075 /* None on this interface. */
3076 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3079 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3080 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3081 num_preferred, (void *)sctp_ifn, cur_addr_num);
3084 * Ok we have num_eligible_addr set with how many we can
3085 * use, this may vary from call to call due to addresses
3086 * being deprecated etc..
3088 if (cur_addr_num >= num_preferred) {
3091 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3092 dest_is_priv, cur_addr_num, fam, ro);
3096 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3101 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3102 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3104 atomic_add_int(&sifa->refcount, 1);
3108 again_with_private_addresses_allowed:
3110 /* plan_c: do we have an acceptable address on the emit interface */
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3113 if (emit_ifn == NULL) {
3114 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3117 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3118 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3120 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3121 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3122 &sctp_ifa->address.sin.sin_addr) != 0)) {
3123 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3128 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3129 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3130 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3131 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3135 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3136 (non_asoc_addr_ok == 0)) {
3137 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3140 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3143 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3147 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3148 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3152 if (((non_asoc_addr_ok == 0) &&
3153 (sctp_is_addr_restricted(stcb, sifa))) ||
3154 (non_asoc_addr_ok &&
3155 (sctp_is_addr_restricted(stcb, sifa)) &&
3156 (!sctp_is_addr_pending(stcb, sifa)))) {
3158 * It is restricted for some reason..
3159 * probably not yet added.
3161 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3166 atomic_add_int(&sifa->refcount, 1);
3171 * plan_d: We are in trouble. No preferred address on the emit
3172 * interface. And not even a preferred address on all interfaces. Go
3173 * out and see if we can find an acceptable address somewhere
3174 * amongst all interfaces.
3176 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3177 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3178 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3179 /* wrong base scope */
3182 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3184 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3185 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3186 &sctp_ifa->address.sin.sin_addr) != 0)) {
3191 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3192 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3193 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3197 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3198 (non_asoc_addr_ok == 0))
3200 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3206 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3210 if (((non_asoc_addr_ok == 0) &&
3211 (sctp_is_addr_restricted(stcb, sifa))) ||
3212 (non_asoc_addr_ok &&
3213 (sctp_is_addr_restricted(stcb, sifa)) &&
3214 (!sctp_is_addr_pending(stcb, sifa)))) {
3216 * It is restricted for some
3217 * reason.. probably not yet added.
3228 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3229 stcb->asoc.scope.ipv4_local_scope = 1;
3231 goto again_with_private_addresses_allowed;
3232 } else if (retried == 1) {
3233 stcb->asoc.scope.ipv4_local_scope = 0;
3241 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3242 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3243 /* wrong base scope */
3246 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3247 struct sctp_ifa *tmp_sifa;
3250 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3251 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3252 &sctp_ifa->address.sin.sin_addr) != 0)) {
3257 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3258 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3259 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3263 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3264 (non_asoc_addr_ok == 0))
3266 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3269 if (tmp_sifa == NULL) {
3272 if (tmp_sifa == sifa) {
3276 if (sctp_is_address_in_scope(tmp_sifa,
3277 &stcb->asoc.scope, 0) == 0) {
3280 if (((non_asoc_addr_ok == 0) &&
3281 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3282 (non_asoc_addr_ok &&
3283 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3284 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3294 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3295 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3296 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3301 atomic_add_int(&sifa->refcount, 1);
3309 /* tcb may be NULL */
3311 sctp_source_address_selection(struct sctp_inpcb *inp,
3312 struct sctp_tcb *stcb,
3314 struct sctp_nets *net,
3315 int non_asoc_addr_ok, uint32_t vrf_id)
3317 struct sctp_ifa *answer;
3318 uint8_t dest_is_priv, dest_is_loop;
3321 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3329 * - Find the route if needed, cache if I can.
3330 * - Look at interface address in route, Is it in the bound list. If so we
3331 * have the best source.
3332 * - If not we must rotate amongst the addresses.
3336 * Do we need to pay attention to scope. We can have a private address
3337 * or a global address we are sourcing or sending to. So if we draw
3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3341 * ------------------------------------------
3342 * source * dest * result
3343 * -----------------------------------------
3344 * <a> Private * Global * NAT
3345 * -----------------------------------------
3346 * <b> Private * Private * No problem
3347 * -----------------------------------------
3348 * <c> Global * Private * Huh, How will this work?
3349 * -----------------------------------------
3350 * <d> Global * Global * No Problem
3351 *------------------------------------------
3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3354 *------------------------------------------
3355 * source * dest * result
3356 * -----------------------------------------
3357 * <a> Linklocal * Global *
3358 * -----------------------------------------
3359 * <b> Linklocal * Linklocal * No problem
3360 * -----------------------------------------
3361 * <c> Global * Linklocal * Huh, How will this work?
3362 * -----------------------------------------
3363 * <d> Global * Global * No Problem
3364 *------------------------------------------
3365 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3367 * And then we add to that what happens if there are multiple addresses
3368 * assigned to an interface. Remember the ifa on a ifn is a linked
3369 * list of addresses. So one interface can have more than one IP
3370 * address. What happens if we have both a private and a global
3371 * address? Do we then use context of destination to sort out which
3372 * one is best? And what about NAT's sending P->G may get you a NAT
3373 * translation, or should you select the G thats on the interface in
3378 * - count the number of addresses on the interface.
3379 * - if it is one, no problem except case <c>.
3380 * For <a> we will assume a NAT out there.
3381 * - if there are more than one, then we need to worry about scope P
3382 * or G. We should prefer G -> G and P -> P if possible.
3383 * Then as a secondary fall back to mixed types G->P being a last
3385 * - The above all works for bound all, but bound specific we need to
3386 * use the same concept but instead only consider the bound
3387 * addresses. If the bound set is NOT assigned to the interface then
3388 * we must use rotation amongst the bound addresses..
3390 if (ro->ro_rt == NULL) {
3392 * Need a route to cache.
3394 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3396 if (ro->ro_rt == NULL) {
3399 fam = ro->ro_dst.sa_family;
3400 dest_is_priv = dest_is_loop = 0;
3401 /* Setup our scopes for the destination */
3405 /* Scope based on outbound address */
3406 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3409 /* mark it as local */
3410 net->addr_is_local = 1;
3412 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3419 /* Scope based on outbound address */
3420 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3421 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3423 * If the address is a loopback address, which
3424 * consists of "::1" OR "fe80::1%lo0", we are
3425 * loopback scope. But we don't use dest_is_priv
3426 * (link local addresses).
3430 /* mark it as local */
3431 net->addr_is_local = 1;
3433 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3440 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3441 SCTP_IPI_ADDR_RLOCK();
3442 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3446 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3447 dest_is_priv, dest_is_loop,
3448 non_asoc_addr_ok, fam);
3449 SCTP_IPI_ADDR_RUNLOCK();
3456 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3457 vrf_id, dest_is_priv,
3459 non_asoc_addr_ok, fam);
3461 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3466 SCTP_IPI_ADDR_RUNLOCK();
3471 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3474 struct sctp_sndinfo sndinfo;
3475 struct sctp_prinfo prinfo;
3476 struct sctp_authinfo authinfo;
3477 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3481 * Independent of how many mbufs, find the c_type inside the control
3482 * structure and copy out the data.
3485 tot_len = SCTP_BUF_LEN(control);
3486 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3487 rem_len = tot_len - off;
3488 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3489 /* There is not enough room for one more. */
3492 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3493 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3494 /* We dont't have a complete CMSG header. */
3497 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3498 /* We don't have the complete CMSG. */
3501 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3502 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3503 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3504 ((c_type == cmh.cmsg_type) ||
3505 ((c_type == SCTP_SNDRCV) &&
3506 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3507 (cmh.cmsg_type == SCTP_PRINFO) ||
3508 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3509 if (c_type == cmh.cmsg_type) {
3510 if (cpsize > INT_MAX) {
3513 if (cmsg_data_len < (int)cpsize) {
3516 /* It is exactly what we want. Copy it out. */
3517 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3520 struct sctp_sndrcvinfo *sndrcvinfo;
3522 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3524 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3527 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3529 switch (cmh.cmsg_type) {
3531 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3534 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3535 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3536 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3537 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3538 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3539 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3542 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3545 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3546 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3547 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3549 sndrcvinfo->sinfo_timetolive = 0;
3551 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3554 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3557 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3558 sndrcvinfo->sinfo_keynumber_valid = 1;
3559 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3572 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3576 struct sctp_initmsg initmsg;
3578 struct sockaddr_in sin;
3581 struct sockaddr_in6 sin6;
3584 tlen = SCTP_BUF_LEN(control);
3587 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3588 /* There is not enough room for one more. */
3592 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3593 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3594 /* We dont't have a complete CMSG header. */
3598 if (((int)cmh.cmsg_len + at) > tlen) {
3599 /* We don't have the complete CMSG. */
3603 if (cmh.cmsg_level == IPPROTO_SCTP) {
3604 switch (cmh.cmsg_type) {
3606 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3610 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3611 if (initmsg.sinit_max_attempts)
3612 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3613 if (initmsg.sinit_num_ostreams)
3614 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3615 if (initmsg.sinit_max_instreams)
3616 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3617 if (initmsg.sinit_max_init_timeo)
3618 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3619 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3620 struct sctp_stream_out *tmp_str;
3622 #if defined(SCTP_DETAILED_STR_STATS)
3626 /* Default is NOT correct */
3627 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3628 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3629 SCTP_TCB_UNLOCK(stcb);
3630 SCTP_MALLOC(tmp_str,
3631 struct sctp_stream_out *,
3632 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3634 SCTP_TCB_LOCK(stcb);
3635 if (tmp_str != NULL) {
3636 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3637 stcb->asoc.strmout = tmp_str;
3638 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3640 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3643 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3644 stcb->asoc.strmout[i].chunks_on_queues = 0;
3645 stcb->asoc.strmout[i].next_mid_ordered = 0;
3646 stcb->asoc.strmout[i].next_mid_unordered = 0;
3647 #if defined(SCTP_DETAILED_STR_STATS)
3648 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3649 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3650 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3653 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3654 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3656 stcb->asoc.strmout[i].sid = i;
3657 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3658 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3659 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3664 case SCTP_DSTADDRV4:
3665 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3669 memset(&sin, 0, sizeof(struct sockaddr_in));
3670 sin.sin_family = AF_INET;
3671 sin.sin_len = sizeof(struct sockaddr_in);
3672 sin.sin_port = stcb->rport;
3673 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3674 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3675 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3676 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3680 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3681 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3688 case SCTP_DSTADDRV6:
3689 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3693 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3694 sin6.sin6_family = AF_INET6;
3695 sin6.sin6_len = sizeof(struct sockaddr_in6);
3696 sin6.sin6_port = stcb->rport;
3697 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3698 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3699 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3704 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3705 in6_sin6_2_sin(&sin, &sin6);
3706 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3707 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3708 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3712 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3713 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3719 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3720 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3730 at += CMSG_ALIGN(cmh.cmsg_len);
3735 static struct sctp_tcb *
3736 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3738 struct mbuf *control,
3739 struct sctp_nets **net_p,
3744 struct sctp_tcb *stcb;
3745 struct sockaddr *addr;
3747 struct sockaddr_in sin;
3750 struct sockaddr_in6 sin6;
3753 tlen = SCTP_BUF_LEN(control);
3756 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3757 /* There is not enough room for one more. */
3761 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3762 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3763 /* We dont't have a complete CMSG header. */
3767 if (((int)cmh.cmsg_len + at) > tlen) {
3768 /* We don't have the complete CMSG. */
3772 if (cmh.cmsg_level == IPPROTO_SCTP) {
3773 switch (cmh.cmsg_type) {
3775 case SCTP_DSTADDRV4:
3776 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3780 memset(&sin, 0, sizeof(struct sockaddr_in));
3781 sin.sin_family = AF_INET;
3782 sin.sin_len = sizeof(struct sockaddr_in);
3783 sin.sin_port = port;
3784 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3785 addr = (struct sockaddr *)&sin;
3789 case SCTP_DSTADDRV6:
3790 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3794 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3795 sin6.sin6_family = AF_INET6;
3796 sin6.sin6_len = sizeof(struct sockaddr_in6);
3797 sin6.sin6_port = port;
3798 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3800 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3801 in6_sin6_2_sin(&sin, &sin6);
3802 addr = (struct sockaddr *)&sin;
3805 addr = (struct sockaddr *)&sin6;
3813 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3819 at += CMSG_ALIGN(cmh.cmsg_len);
3824 static struct mbuf *
3825 sctp_add_cookie(struct mbuf *init, int init_offset,
3826 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3828 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3829 struct sctp_state_cookie *stc;
3830 struct sctp_paramhdr *ph;
3835 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3836 sizeof(struct sctp_paramhdr)), 0,
3837 M_NOWAIT, 1, MT_DATA);
3841 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3842 if (copy_init == NULL) {
3846 #ifdef SCTP_MBUF_LOGGING
3847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3848 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3851 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3853 if (copy_initack == NULL) {
3855 sctp_m_freem(copy_init);
3858 #ifdef SCTP_MBUF_LOGGING
3859 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3860 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3863 /* easy side we just drop it on the end */
3864 ph = mtod(mret, struct sctp_paramhdr *);
3865 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3866 sizeof(struct sctp_paramhdr);
3867 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3868 sizeof(struct sctp_paramhdr));
3869 ph->param_type = htons(SCTP_STATE_COOKIE);
3870 ph->param_length = 0; /* fill in at the end */
3871 /* Fill in the stc cookie data */
3872 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3874 /* tack the INIT and then the INIT-ACK onto the chain */
3876 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3877 cookie_sz += SCTP_BUF_LEN(m_at);
3878 if (SCTP_BUF_NEXT(m_at) == NULL) {
3879 SCTP_BUF_NEXT(m_at) = copy_init;
3883 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3884 cookie_sz += SCTP_BUF_LEN(m_at);
3885 if (SCTP_BUF_NEXT(m_at) == NULL) {
3886 SCTP_BUF_NEXT(m_at) = copy_initack;
3890 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3891 cookie_sz += SCTP_BUF_LEN(m_at);
3892 if (SCTP_BUF_NEXT(m_at) == NULL) {
3896 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3898 /* no space, so free the entire chain */
3902 SCTP_BUF_LEN(sig) = 0;
3903 SCTP_BUF_NEXT(m_at) = sig;
3905 foo = (uint8_t *)(mtod(sig, caddr_t)+sig_offset);
3906 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3908 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3909 cookie_sz += SCTP_SIGNATURE_SIZE;
3910 ph->param_length = htons(cookie_sz);
3916 sctp_get_ect(struct sctp_tcb *stcb)
3918 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3919 return (SCTP_ECT0_BIT);
3925 #if defined(INET) || defined(INET6)
3927 sctp_handle_no_route(struct sctp_tcb *stcb,
3928 struct sctp_nets *net,
3931 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3934 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3935 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3936 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3937 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3939 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3943 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3944 net->dest_state &= ~SCTP_ADDR_PF;
3948 if (net == stcb->asoc.primary_destination) {
3949 /* need a new primary */
3950 struct sctp_nets *alt;
3952 alt = sctp_find_alternate_net(stcb, net, 0);
3954 if (stcb->asoc.alternate) {
3955 sctp_free_remote_addr(stcb->asoc.alternate);
3957 stcb->asoc.alternate = alt;
3958 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3959 if (net->ro._s_addr) {
3960 sctp_free_ifa(net->ro._s_addr);
3961 net->ro._s_addr = NULL;
3963 net->src_addr_selected = 0;
3972 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3973 struct sctp_tcb *stcb, /* may be NULL */
3974 struct sctp_nets *net,
3975 struct sockaddr *to,
3977 uint32_t auth_offset,
3978 struct sctp_auth_chunk *auth,
3979 uint16_t auth_keyid,
3980 int nofragment_flag,
3987 union sctp_sockstore *over_addr,
3988 uint8_t mflowtype, uint32_t mflowid,
3989 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3990 int so_locked SCTP_UNUSED
3996 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3998 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3999 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4000 * - fill in the HMAC digest of any AUTH chunk in the packet.
4001 * - calculate and fill in the SCTP checksum.
4002 * - prepend an IP address header.
4003 * - if boundall use INADDR_ANY.
4004 * - if boundspecific do source address selection.
4005 * - set fragmentation option for ipV4.
4006 * - On return from IP output, check/adjust mtu size of output
4007 * interface and smallest_mtu size as well.
4009 /* Will need ifdefs around this */
4011 struct sctphdr *sctphdr;
4014 #if defined(INET) || defined(INET6)
4017 #if defined(INET) || defined(INET6)
4019 sctp_route_t *ro = NULL;
4020 struct udphdr *udp = NULL;
4023 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4024 struct socket *so = NULL;
4027 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4028 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4032 #if defined(INET) || defined(INET6)
4034 vrf_id = stcb->asoc.vrf_id;
4036 vrf_id = inp->def_vrf_id;
4039 /* fill in the HMAC digest for any AUTH chunk in the packet */
4040 if ((auth != NULL) && (stcb != NULL)) {
4041 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4045 tos_value = net->dscp;
4047 tos_value = stcb->asoc.default_dscp;
4049 tos_value = inp->sctp_ep.default_dscp;
4052 switch (to->sa_family) {
4056 struct ip *ip = NULL;
4057 sctp_route_t iproute;
4060 len = SCTP_MIN_V4_OVERHEAD;
4062 len += sizeof(struct udphdr);
4064 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4067 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4070 SCTP_ALIGN_TO_END(newm, len);
4071 SCTP_BUF_LEN(newm) = len;
4072 SCTP_BUF_NEXT(newm) = m;
4075 m->m_pkthdr.flowid = net->flowid;
4076 M_HASHTYPE_SET(m, net->flowtype);
4078 m->m_pkthdr.flowid = mflowid;
4079 M_HASHTYPE_SET(m, mflowtype);
4081 packet_length = sctp_calculate_len(m);
4082 ip = mtod(m, struct ip *);
4083 ip->ip_v = IPVERSION;
4084 ip->ip_hl = (sizeof(struct ip) >> 2);
4085 if (tos_value == 0) {
4087 * This means especially, that it is not set
4088 * at the SCTP layer. So use the value from
4091 tos_value = inp->ip_inp.inp.inp_ip_tos;
4095 tos_value |= sctp_get_ect(stcb);
4097 if ((nofragment_flag) && (port == 0)) {
4098 ip->ip_off = htons(IP_DF);
4100 ip->ip_off = htons(0);
4102 /* FreeBSD has a function for ip_id's */
4105 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4106 ip->ip_len = htons(packet_length);
4107 ip->ip_tos = tos_value;
4109 ip->ip_p = IPPROTO_UDP;
4111 ip->ip_p = IPPROTO_SCTP;
4116 memset(&iproute, 0, sizeof(iproute));
4117 memcpy(&ro->ro_dst, to, to->sa_len);
4119 ro = (sctp_route_t *)&net->ro;
4121 /* Now the address selection part */
4122 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4124 /* call the routine to select the src address */
4125 if (net && out_of_asoc_ok == 0) {
4126 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4127 sctp_free_ifa(net->ro._s_addr);
4128 net->ro._s_addr = NULL;
4129 net->src_addr_selected = 0;
4135 if (net->src_addr_selected == 0) {
4136 /* Cache the source address */
4137 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4140 net->src_addr_selected = 1;
4142 if (net->ro._s_addr == NULL) {
4143 /* No route to host */
4144 net->src_addr_selected = 0;
4145 sctp_handle_no_route(stcb, net, so_locked);
4146 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4148 return (EHOSTUNREACH);
4150 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4152 if (over_addr == NULL) {
4153 struct sctp_ifa *_lsrc;
4155 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4159 if (_lsrc == NULL) {
4160 sctp_handle_no_route(stcb, net, so_locked);
4161 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4163 return (EHOSTUNREACH);
4165 ip->ip_src = _lsrc->address.sin.sin_addr;
4166 sctp_free_ifa(_lsrc);
4168 ip->ip_src = over_addr->sin.sin_addr;
4169 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4173 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4174 sctp_handle_no_route(stcb, net, so_locked);
4175 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4177 return (EHOSTUNREACH);
4179 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4180 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4181 udp->uh_dport = port;
4182 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4184 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4188 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4190 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4193 sctphdr->src_port = src_port;
4194 sctphdr->dest_port = dest_port;
4195 sctphdr->v_tag = v_tag;
4196 sctphdr->checksum = 0;
4199 * If source address selection fails and we find no
4200 * route then the ip_output should fail as well with
4201 * a NO_ROUTE_TO_HOST type error. We probably should
4202 * catch that somewhere and abort the association
4203 * right away (assuming this is an INIT being sent).
4205 if (ro->ro_rt == NULL) {
4207 * src addr selection failed to find a route
4208 * (or valid source addr), so we can't get
4209 * there from here (yet)!
4211 sctp_handle_no_route(stcb, net, so_locked);
4212 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4214 return (EHOSTUNREACH);
4216 if (ro != &iproute) {
4217 memcpy(&iproute, ro, sizeof(*ro));
4219 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4220 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4221 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4222 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4223 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4226 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4227 /* failed to prepend data, give up */
4228 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4232 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4234 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4235 SCTP_STAT_INCR(sctps_sendswcrc);
4237 SCTP_ENABLE_UDP_CSUM(o_pak);
4240 m->m_pkthdr.csum_flags = CSUM_SCTP;
4241 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4242 SCTP_STAT_INCR(sctps_sendhwcrc);
4244 #ifdef SCTP_PACKET_LOGGING
4245 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4246 sctp_packet_log(o_pak);
4248 /* send it out. table id is taken from stcb */
4249 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4250 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4251 so = SCTP_INP_SO(inp);
4252 SCTP_SOCKET_UNLOCK(so, 0);
4255 SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
4256 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4257 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4258 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4259 atomic_add_int(&stcb->asoc.refcnt, 1);
4260 SCTP_TCB_UNLOCK(stcb);
4261 SCTP_SOCKET_LOCK(so, 0);
4262 SCTP_TCB_LOCK(stcb);
4263 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4266 SCTP_STAT_INCR(sctps_sendpackets);
4267 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4269 SCTP_STAT_INCR(sctps_senderrors);
4271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4273 /* free tempy routes */
4276 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4277 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4280 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4283 mtu -= sizeof(struct udphdr);
4285 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4286 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4290 } else if (ro->ro_rt == NULL) {
4291 /* route was freed */
4292 if (net->ro._s_addr &&
4293 net->src_addr_selected) {
4294 sctp_free_ifa(net->ro._s_addr);
4295 net->ro._s_addr = NULL;
4297 net->src_addr_selected = 0;
4306 uint32_t flowlabel, flowinfo;
4307 struct ip6_hdr *ip6h;
4308 struct route_in6 ip6route;
4310 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4312 struct sockaddr_in6 lsa6_storage;
4314 u_short prev_port = 0;
4318 flowlabel = net->flowlabel;
4320 flowlabel = stcb->asoc.default_flowlabel;
4322 flowlabel = inp->sctp_ep.default_flowlabel;
4324 if (flowlabel == 0) {
4326 * This means especially, that it is not set
4327 * at the SCTP layer. So use the value from
4330 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4332 flowlabel &= 0x000fffff;
4333 len = SCTP_MIN_OVERHEAD;
4335 len += sizeof(struct udphdr);
4337 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4340 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4343 SCTP_ALIGN_TO_END(newm, len);
4344 SCTP_BUF_LEN(newm) = len;
4345 SCTP_BUF_NEXT(newm) = m;
4348 m->m_pkthdr.flowid = net->flowid;
4349 M_HASHTYPE_SET(m, net->flowtype);
4351 m->m_pkthdr.flowid = mflowid;
4352 M_HASHTYPE_SET(m, mflowtype);
4354 packet_length = sctp_calculate_len(m);
4356 ip6h = mtod(m, struct ip6_hdr *);
4357 /* protect *sin6 from overwrite */
4358 sin6 = (struct sockaddr_in6 *)to;
4362 /* KAME hack: embed scopeid */
4363 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4364 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4368 memset(&ip6route, 0, sizeof(ip6route));
4369 ro = (sctp_route_t *)&ip6route;
4370 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4372 ro = (sctp_route_t *)&net->ro;
4375 * We assume here that inp_flow is in host byte
4376 * order within the TCB!
4378 if (tos_value == 0) {
4380 * This means especially, that it is not set
4381 * at the SCTP layer. So use the value from
4384 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4388 tos_value |= sctp_get_ect(stcb);
4392 flowinfo |= tos_value;
4394 flowinfo |= flowlabel;
4395 ip6h->ip6_flow = htonl(flowinfo);
4397 ip6h->ip6_nxt = IPPROTO_UDP;
4399 ip6h->ip6_nxt = IPPROTO_SCTP;
4401 ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4402 ip6h->ip6_dst = sin6->sin6_addr;
4405 * Add SRC address selection here: we can only reuse
4406 * to a limited degree the kame src-addr-sel, since
4407 * we can try their selection but it may not be
4410 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4411 lsa6_tmp.sin6_family = AF_INET6;
4412 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4414 if (net && out_of_asoc_ok == 0) {
4415 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4416 sctp_free_ifa(net->ro._s_addr);
4417 net->ro._s_addr = NULL;
4418 net->src_addr_selected = 0;
4424 if (net->src_addr_selected == 0) {
4425 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4426 /* KAME hack: embed scopeid */
4427 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4428 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4431 /* Cache the source address */
4432 net->ro._s_addr = sctp_source_address_selection(inp,
4438 (void)sa6_recoverscope(sin6);
4439 net->src_addr_selected = 1;
4441 if (net->ro._s_addr == NULL) {
4442 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4443 net->src_addr_selected = 0;
4444 sctp_handle_no_route(stcb, net, so_locked);
4445 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4447 return (EHOSTUNREACH);
4449 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4451 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4452 /* KAME hack: embed scopeid */
4453 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4454 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4457 if (over_addr == NULL) {
4458 struct sctp_ifa *_lsrc;
4460 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4464 if (_lsrc == NULL) {
4465 sctp_handle_no_route(stcb, net, so_locked);
4466 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4468 return (EHOSTUNREACH);
4470 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4471 sctp_free_ifa(_lsrc);
4473 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4474 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4476 (void)sa6_recoverscope(sin6);
4478 lsa6->sin6_port = inp->sctp_lport;
4480 if (ro->ro_rt == NULL) {
4482 * src addr selection failed to find a route
4483 * (or valid source addr), so we can't get
4486 sctp_handle_no_route(stcb, net, so_locked);
4487 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4489 return (EHOSTUNREACH);
4492 * XXX: sa6 may not have a valid sin6_scope_id in
4493 * the non-SCOPEDROUTING case.
4495 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4496 lsa6_storage.sin6_family = AF_INET6;
4497 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4498 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4499 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4500 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4505 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4506 lsa6_storage.sin6_port = inp->sctp_lport;
4507 lsa6 = &lsa6_storage;
4508 ip6h->ip6_src = lsa6->sin6_addr;
4511 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4512 sctp_handle_no_route(stcb, net, so_locked);
4513 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4515 return (EHOSTUNREACH);
4517 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4518 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4519 udp->uh_dport = port;
4520 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4522 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4524 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4527 sctphdr->src_port = src_port;
4528 sctphdr->dest_port = dest_port;
4529 sctphdr->v_tag = v_tag;
4530 sctphdr->checksum = 0;
4533 * We set the hop limit now since there is a good
4534 * chance that our ro pointer is now filled
4536 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4537 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4540 /* Copy to be sure something bad is not happening */
4541 sin6->sin6_addr = ip6h->ip6_dst;
4542 lsa6->sin6_addr = ip6h->ip6_src;
4545 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4546 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4547 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4548 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4549 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4551 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4553 * preserve the port and scope for link
4556 prev_scope = sin6->sin6_scope_id;
4557 prev_port = sin6->sin6_port;
4560 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4561 /* failed to prepend data, give up */
4563 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4566 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4568 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4569 SCTP_STAT_INCR(sctps_sendswcrc);
4570 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4571 udp->uh_sum = 0xffff;
4574 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4575 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4576 SCTP_STAT_INCR(sctps_sendhwcrc);
4578 /* send it out. table id is taken from stcb */
4579 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4580 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4581 so = SCTP_INP_SO(inp);
4582 SCTP_SOCKET_UNLOCK(so, 0);
4585 #ifdef SCTP_PACKET_LOGGING
4586 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4587 sctp_packet_log(o_pak);
4589 SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
4590 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4591 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4592 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4593 atomic_add_int(&stcb->asoc.refcnt, 1);
4594 SCTP_TCB_UNLOCK(stcb);
4595 SCTP_SOCKET_LOCK(so, 0);
4596 SCTP_TCB_LOCK(stcb);
4597 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4601 /* for link local this must be done */
4602 sin6->sin6_scope_id = prev_scope;
4603 sin6->sin6_port = prev_port;
4605 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4606 SCTP_STAT_INCR(sctps_sendpackets);
4607 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4609 SCTP_STAT_INCR(sctps_senderrors);
4612 /* Now if we had a temp route free it */
4616 * PMTU check versus smallest asoc MTU goes
4619 if (ro->ro_rt == NULL) {
4620 /* Route was freed */
4621 if (net->ro._s_addr &&
4622 net->src_addr_selected) {
4623 sctp_free_ifa(net->ro._s_addr);
4624 net->ro._s_addr = NULL;
4626 net->src_addr_selected = 0;
4628 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4629 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4632 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4635 mtu -= sizeof(struct udphdr);
4637 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4638 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4643 if (ND_IFINFO(ifp)->linkmtu &&
4644 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4645 sctp_mtu_size_reset(inp,
4647 ND_IFINFO(ifp)->linkmtu);
4655 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4656 ((struct sockaddr *)to)->sa_family);
4658 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4665 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4666 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4671 struct mbuf *m, *m_last;
4672 struct sctp_nets *net;
4673 struct sctp_init_chunk *init;
4674 struct sctp_supported_addr_param *sup_addr;
4675 struct sctp_adaptation_layer_indication *ali;
4676 struct sctp_supported_chunk_types_param *pr_supported;
4677 struct sctp_paramhdr *ph;
4678 int cnt_inits_to = 0;
4680 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4682 /* INIT's always go to the primary (and usually ONLY address) */
4683 net = stcb->asoc.primary_destination;
4685 net = TAILQ_FIRST(&stcb->asoc.nets);
4690 /* we confirm any address we send an INIT to */
4691 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4692 (void)sctp_set_primary_addr(stcb, NULL, net);
4694 /* we confirm any address we send an INIT to */
4695 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4697 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4699 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4701 * special hook, if we are sending to link local it will not
4702 * show up in our private address count.
4704 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4708 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4709 /* This case should not happen */
4710 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4713 /* start the INIT timer */
4714 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4716 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4718 /* No memory, INIT timer will re-attempt. */
4719 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4722 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4724 /* Now lets put the chunk header in place */
4725 init = mtod(m, struct sctp_init_chunk *);
4726 /* now the chunk header */
4727 init->ch.chunk_type = SCTP_INITIATION;
4728 init->ch.chunk_flags = 0;
4729 /* fill in later from mbuf we build */
4730 init->ch.chunk_length = 0;
4731 /* place in my tag */
4732 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4733 /* set up some of the credits. */
4734 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4735 SCTP_MINIMAL_RWND));
4736 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4737 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4738 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4740 /* Adaptation layer indication parameter */
4741 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4742 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4743 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4744 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4745 ali->ph.param_length = htons(parameter_len);
4746 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4747 chunk_len += parameter_len;
4751 if (stcb->asoc.ecn_supported == 1) {
4752 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4753 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4754 ph->param_type = htons(SCTP_ECN_CAPABLE);
4755 ph->param_length = htons(parameter_len);
4756 chunk_len += parameter_len;
4759 /* PR-SCTP supported parameter */
4760 if (stcb->asoc.prsctp_supported == 1) {
4761 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4762 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4763 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4764 ph->param_length = htons(parameter_len);
4765 chunk_len += parameter_len;
4768 /* Add NAT friendly parameter. */
4769 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4770 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4771 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4772 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4773 ph->param_length = htons(parameter_len);
4774 chunk_len += parameter_len;
4777 /* And now tell the peer which extensions we support */
4779 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4780 if (stcb->asoc.prsctp_supported == 1) {
4781 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4782 if (stcb->asoc.idata_supported) {
4783 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4786 if (stcb->asoc.auth_supported == 1) {
4787 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4789 if (stcb->asoc.asconf_supported == 1) {
4790 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4791 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4793 if (stcb->asoc.reconfig_supported == 1) {
4794 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4796 if (stcb->asoc.idata_supported) {
4797 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4799 if (stcb->asoc.nrsack_supported == 1) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4802 if (stcb->asoc.pktdrop_supported == 1) {
4803 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4806 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4807 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4808 pr_supported->ph.param_length = htons(parameter_len);
4809 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4810 chunk_len += parameter_len;
4812 /* add authentication parameters */
4813 if (stcb->asoc.auth_supported) {
4814 /* attach RANDOM parameter, if available */
4815 if (stcb->asoc.authinfo.random != NULL) {
4816 struct sctp_auth_random *randp;
4818 if (padding_len > 0) {
4819 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4820 chunk_len += padding_len;
4823 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4824 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4825 /* random key already contains the header */
4826 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4827 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4828 chunk_len += parameter_len;
4830 /* add HMAC_ALGO parameter */
4831 if (stcb->asoc.local_hmacs != NULL) {
4832 struct sctp_auth_hmac_algo *hmacs;
4834 if (padding_len > 0) {
4835 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4836 chunk_len += padding_len;
4839 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4840 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4841 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4842 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4843 hmacs->ph.param_length = htons(parameter_len);
4844 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4845 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4846 chunk_len += parameter_len;
4848 /* add CHUNKS parameter */
4849 if (stcb->asoc.local_auth_chunks != NULL) {
4850 struct sctp_auth_chunk_list *chunks;
4852 if (padding_len > 0) {
4853 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4854 chunk_len += padding_len;
4857 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4858 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4859 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4860 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4861 chunks->ph.param_length = htons(parameter_len);
4862 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4863 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4864 chunk_len += parameter_len;
4868 /* now any cookie time extensions */
4869 if (stcb->asoc.cookie_preserve_req) {
4870 struct sctp_cookie_perserve_param *cookie_preserve;
4872 if (padding_len > 0) {
4873 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4874 chunk_len += padding_len;
4877 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4878 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4879 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4880 cookie_preserve->ph.param_length = htons(parameter_len);
4881 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4882 stcb->asoc.cookie_preserve_req = 0;
4883 chunk_len += parameter_len;
4886 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4889 if (padding_len > 0) {
4890 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4891 chunk_len += padding_len;
4894 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4895 if (stcb->asoc.scope.ipv4_addr_legal) {
4896 parameter_len += (uint16_t)sizeof(uint16_t);
4898 if (stcb->asoc.scope.ipv6_addr_legal) {
4899 parameter_len += (uint16_t)sizeof(uint16_t);
4901 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4902 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4903 sup_addr->ph.param_length = htons(parameter_len);
4905 if (stcb->asoc.scope.ipv4_addr_legal) {
4906 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4908 if (stcb->asoc.scope.ipv6_addr_legal) {
4909 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4911 padding_len = 4 - 2 * i;
4912 chunk_len += parameter_len;
4915 SCTP_BUF_LEN(m) = chunk_len;
4916 /* now the addresses */
4918 * To optimize this we could put the scoping stuff into a structure
4919 * and remove the individual uint8's from the assoc structure. Then
4920 * we could just sifa in the address within the stcb. But for now
4921 * this is a quick hack to get the address stuff teased apart.
4923 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4925 &padding_len, &chunk_len);
4927 init->ch.chunk_length = htons(chunk_len);
4928 if (padding_len > 0) {
4929 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4934 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4935 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4936 (struct sockaddr *)&net->ro._l_addr,
4937 m, 0, NULL, 0, 0, 0, 0,
4938 inp->sctp_lport, stcb->rport, htonl(0),
4942 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4943 if (error == ENOBUFS) {
4944 stcb->asoc.ifp_had_enobuf = 1;
4945 SCTP_STAT_INCR(sctps_lowlevelerr);
4948 stcb->asoc.ifp_had_enobuf = 0;
4950 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4951 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4955 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4956 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4959 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4960 * being equal to the beginning of the params i.e. (iphlen +
4961 * sizeof(struct sctp_init_msg) parse through the parameters to the
4962 * end of the mbuf verifying that all parameters are known.
4964 * For unknown parameters build and return a mbuf with
4965 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4966 * processing this chunk stop, and set *abort_processing to 1.
4968 * By having param_offset be pre-set to where parameters begin it is
4969 * hoped that this routine may be reused in the future by new
4972 struct sctp_paramhdr *phdr, params;
4974 struct mbuf *mat, *op_err;
4975 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4976 int at, limit, pad_needed;
4977 uint16_t ptype, plen, padded_size;
4980 *abort_processing = 0;
4983 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4986 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4987 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4988 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4989 ptype = ntohs(phdr->param_type);
4990 plen = ntohs(phdr->param_length);
4991 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4992 /* wacked parameter */
4993 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4996 limit -= SCTP_SIZE32(plen);
4998 * All parameters for all chunks that we know/understand are
4999 * listed here. We process them other places and make
5000 * appropriate stop actions per the upper bits. However this
5001 * is the generic routine processor's can call to get back
5002 * an operr.. to either incorporate (init-ack) or send.
5004 padded_size = SCTP_SIZE32(plen);
5006 /* Param's with variable size */
5007 case SCTP_HEARTBEAT_INFO:
5008 case SCTP_STATE_COOKIE:
5009 case SCTP_UNRECOG_PARAM:
5010 case SCTP_ERROR_CAUSE_IND:
5014 /* Param's with variable size within a range */
5015 case SCTP_CHUNK_LIST:
5016 case SCTP_SUPPORTED_CHUNK_EXT:
5017 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5018 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5023 case SCTP_SUPPORTED_ADDRTYPE:
5024 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5025 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5031 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5032 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5037 case SCTP_SET_PRIM_ADDR:
5038 case SCTP_DEL_IP_ADDRESS:
5039 case SCTP_ADD_IP_ADDRESS:
5040 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5041 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5042 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5047 /* Param's with a fixed size */
5048 case SCTP_IPV4_ADDRESS:
5049 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5055 case SCTP_IPV6_ADDRESS:
5056 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5057 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5062 case SCTP_COOKIE_PRESERVE:
5063 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5069 case SCTP_HAS_NAT_SUPPORT:
5072 case SCTP_PRSCTP_SUPPORTED:
5073 if (padded_size != sizeof(struct sctp_paramhdr)) {
5074 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5079 case SCTP_ECN_CAPABLE:
5080 if (padded_size != sizeof(struct sctp_paramhdr)) {
5081 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5086 case SCTP_ULP_ADAPTATION:
5087 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5088 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5093 case SCTP_SUCCESS_REPORT:
5094 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5095 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5100 case SCTP_HOSTNAME_ADDRESS:
5102 /* We can NOT handle HOST NAME addresses!! */
5105 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5106 *abort_processing = 1;
5107 if (op_err == NULL) {
5108 /* Ok need to try to get a mbuf */
5110 l_len = SCTP_MIN_OVERHEAD;
5112 l_len = SCTP_MIN_V4_OVERHEAD;
5114 l_len += sizeof(struct sctp_chunkhdr);
5116 l_len += sizeof(struct sctp_paramhdr);
5117 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5119 SCTP_BUF_LEN(op_err) = 0;
5121 * pre-reserve space for ip
5122 * and sctp header and
5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5135 /* If we have space */
5136 struct sctp_paramhdr s;
5139 uint32_t cpthis = 0;
5141 pad_needed = 4 - (err_at % 4);
5142 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5143 err_at += pad_needed;
5145 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5146 s.param_length = htons(sizeof(s) + plen);
5147 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5148 err_at += sizeof(s);
5149 if (plen > sizeof(tempbuf)) {
5150 plen = sizeof(tempbuf);
5152 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5154 sctp_m_freem(op_err);
5156 * we are out of memory but
5157 * we still need to have a
5158 * look at what to do (the
5159 * system is in trouble
5164 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5171 * we do not recognize the parameter figure out what
5174 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5175 if ((ptype & 0x4000) == 0x4000) {
5176 /* Report bit is set?? */
5177 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5178 if (op_err == NULL) {
5181 /* Ok need to try to get an mbuf */
5183 l_len = SCTP_MIN_OVERHEAD;
5185 l_len = SCTP_MIN_V4_OVERHEAD;
5187 l_len += sizeof(struct sctp_chunkhdr);
5189 l_len += sizeof(struct sctp_paramhdr);
5190 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5192 SCTP_BUF_LEN(op_err) = 0;
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5198 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5199 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5203 /* If we have space */
5204 struct sctp_paramhdr s;
5207 uint32_t cpthis = 0;
5209 pad_needed = 4 - (err_at % 4);
5210 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5211 err_at += pad_needed;
5213 s.param_type = htons(SCTP_UNRECOG_PARAM);
5214 s.param_length = htons(sizeof(s) + plen);
5215 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5216 err_at += sizeof(s);
5217 if (plen > sizeof(tempbuf)) {
5218 plen = sizeof(tempbuf);
5220 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5222 sctp_m_freem(op_err);
5224 * we are out of memory but
5225 * we still need to have a
5226 * look at what to do (the
5227 * system is in trouble
5231 goto more_processing;
5233 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5238 if ((ptype & 0x8000) == 0x0000) {
5239 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5242 /* skip this chunk and continue processing */
5243 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5244 at += SCTP_SIZE32(plen);
5249 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5253 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5254 *abort_processing = 1;
5255 if ((op_err == NULL) && phdr) {
5258 l_len = SCTP_MIN_OVERHEAD;
5260 l_len = SCTP_MIN_V4_OVERHEAD;
5262 l_len += sizeof(struct sctp_chunkhdr);
5263 l_len += (2 * sizeof(struct sctp_paramhdr));
5264 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5266 SCTP_BUF_LEN(op_err) = 0;
5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5270 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5272 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5273 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5276 if ((op_err) && phdr) {
5277 struct sctp_paramhdr s;
5280 uint32_t cpthis = 0;
5282 pad_needed = 4 - (err_at % 4);
5283 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5284 err_at += pad_needed;
5286 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5287 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5288 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5289 err_at += sizeof(s);
5290 /* Only copy back the p-hdr that caused the issue */
5291 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5297 sctp_are_there_new_addresses(struct sctp_association *asoc,
5298 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5301 * Given a INIT packet, look through the packet to verify that there
5302 * are NO new addresses. As we go through the parameters add reports
5303 * of any un-understood parameters that require an error. Also we
5304 * must return (1) to drop the packet if we see a un-understood
5305 * parameter that tells us to drop the chunk.
5307 struct sockaddr *sa_touse;
5308 struct sockaddr *sa;
5309 struct sctp_paramhdr *phdr, params;
5310 uint16_t ptype, plen;
5312 struct sctp_nets *net;
5315 struct sockaddr_in sin4, *sa4;
5318 struct sockaddr_in6 sin6, *sa6;
5322 memset(&sin4, 0, sizeof(sin4));
5323 sin4.sin_family = AF_INET;
5324 sin4.sin_len = sizeof(sin4);
5327 memset(&sin6, 0, sizeof(sin6));
5328 sin6.sin6_family = AF_INET6;
5329 sin6.sin6_len = sizeof(sin6);
5331 /* First what about the src address of the pkt ? */
5333 switch (src->sa_family) {
5336 if (asoc->scope.ipv4_addr_legal) {
5343 if (asoc->scope.ipv6_addr_legal) {
5354 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5355 sa = (struct sockaddr *)&net->ro._l_addr;
5356 if (sa->sa_family == src->sa_family) {
5358 if (sa->sa_family == AF_INET) {
5359 struct sockaddr_in *src4;
5361 sa4 = (struct sockaddr_in *)sa;
5362 src4 = (struct sockaddr_in *)src;
5363 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5370 if (sa->sa_family == AF_INET6) {
5371 struct sockaddr_in6 *src6;
5373 sa6 = (struct sockaddr_in6 *)sa;
5374 src6 = (struct sockaddr_in6 *)src;
5375 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5384 /* New address added! no need to look further. */
5388 /* Ok so far lets munge through the rest of the packet */
5389 offset += sizeof(struct sctp_init_chunk);
5390 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5393 ptype = ntohs(phdr->param_type);
5394 plen = ntohs(phdr->param_length);
5397 case SCTP_IPV4_ADDRESS:
5399 struct sctp_ipv4addr_param *p4, p4_buf;
5401 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5404 phdr = sctp_get_next_param(in_initpkt, offset,
5405 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5409 if (asoc->scope.ipv4_addr_legal) {
5410 p4 = (struct sctp_ipv4addr_param *)phdr;
5411 sin4.sin_addr.s_addr = p4->addr;
5412 sa_touse = (struct sockaddr *)&sin4;
5418 case SCTP_IPV6_ADDRESS:
5420 struct sctp_ipv6addr_param *p6, p6_buf;
5422 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5425 phdr = sctp_get_next_param(in_initpkt, offset,
5426 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5430 if (asoc->scope.ipv6_addr_legal) {
5431 p6 = (struct sctp_ipv6addr_param *)phdr;
5432 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5434 sa_touse = (struct sockaddr *)&sin6;
5444 /* ok, sa_touse points to one to check */
5446 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5447 sa = (struct sockaddr *)&net->ro._l_addr;
5448 if (sa->sa_family != sa_touse->sa_family) {
5452 if (sa->sa_family == AF_INET) {
5453 sa4 = (struct sockaddr_in *)sa;
5454 if (sa4->sin_addr.s_addr ==
5455 sin4.sin_addr.s_addr) {
5462 if (sa->sa_family == AF_INET6) {
5463 sa6 = (struct sockaddr_in6 *)sa;
5464 if (SCTP6_ARE_ADDR_EQUAL(
5473 /* New addr added! no need to look further */
5477 offset += SCTP_SIZE32(plen);
5478 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5484 * Given a MBUF chain that was sent into us containing an INIT. Build a
5485 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5486 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5487 * message (i.e. the struct sctp_init_msg).
5490 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5491 struct sctp_nets *src_net, struct mbuf *init_pkt,
5492 int iphlen, int offset,
5493 struct sockaddr *src, struct sockaddr *dst,
5494 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5495 uint8_t mflowtype, uint32_t mflowid,
5496 uint32_t vrf_id, uint16_t port)
5498 struct sctp_association *asoc;
5499 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5500 struct sctp_init_ack_chunk *initack;
5501 struct sctp_adaptation_layer_indication *ali;
5502 struct sctp_supported_chunk_types_param *pr_supported;
5503 struct sctp_paramhdr *ph;
5504 union sctp_sockstore *over_addr;
5505 struct sctp_scoping scp;
5508 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5509 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5510 struct sockaddr_in *sin;
5513 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5514 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5515 struct sockaddr_in6 *sin6;
5517 struct sockaddr *to;
5518 struct sctp_state_cookie stc;
5519 struct sctp_nets *net = NULL;
5520 uint8_t *signature = NULL;
5521 int cnt_inits_to = 0;
5522 uint16_t his_limit, i_want;
5524 int nat_friendly = 0;
5527 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5534 if ((asoc != NULL) &&
5535 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5536 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5538 * new addresses, out of here in non-cookie-wait
5541 * Send an ABORT, without the new address error
5542 * cause. This looks no different than if no
5543 * listener was present.
5545 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5547 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5548 mflowtype, mflowid, inp->fibnum,
5552 if (src_net != NULL && (src_net->port != port)) {
5554 * change of remote encapsulation port, out of here
5555 * in non-cookie-wait states
5557 * Send an ABORT, without an specific error cause.
5558 * This looks no different than if no listener was
5561 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5562 "Remote encapsulation port changed");
5563 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5564 mflowtype, mflowid, inp->fibnum,
5570 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5571 (offset + sizeof(struct sctp_init_chunk)),
5572 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5575 if (op_err == NULL) {
5576 char msg[SCTP_DIAG_INFO_LEN];
5578 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5579 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5582 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5583 init_chk->init.initiate_tag, op_err,
5584 mflowtype, mflowid, inp->fibnum,
5588 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5590 /* No memory, INIT timer will re-attempt. */
5592 sctp_m_freem(op_err);
5595 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5599 * We might not overwrite the identification[] completely and on
5600 * some platforms time_entered will contain some padding. Therefore
5601 * zero out the cookie to avoid putting uninitialized memory on the
5604 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5606 /* the time I built cookie */
5607 (void)SCTP_GETTIME_TIMEVAL(&now);
5608 stc.time_entered.tv_sec = now.tv_sec;
5609 stc.time_entered.tv_usec = now.tv_usec;
5611 /* populate any tie tags */
5613 /* unlock before tag selections */
5614 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5615 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5616 stc.cookie_life = asoc->cookie_life;
5617 net = asoc->primary_destination;
5619 stc.tie_tag_my_vtag = 0;
5620 stc.tie_tag_peer_vtag = 0;
5621 /* life I will award this cookie */
5622 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5625 /* copy in the ports for later check */
5626 stc.myport = sh->dest_port;
5627 stc.peerport = sh->src_port;
5630 * If we wanted to honor cookie life extensions, we would add to
5631 * stc.cookie_life. For now we should NOT honor any extension
5633 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5634 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5635 stc.ipv6_addr_legal = 1;
5636 if (SCTP_IPV6_V6ONLY(inp)) {
5637 stc.ipv4_addr_legal = 0;
5639 stc.ipv4_addr_legal = 1;
5642 stc.ipv6_addr_legal = 0;
5643 stc.ipv4_addr_legal = 1;
5648 switch (dst->sa_family) {
5652 /* lookup address */
5653 stc.address[0] = src4->sin_addr.s_addr;
5657 stc.addr_type = SCTP_IPV4_ADDRESS;
5658 /* local from address */
5659 stc.laddress[0] = dst4->sin_addr.s_addr;
5660 stc.laddress[1] = 0;
5661 stc.laddress[2] = 0;
5662 stc.laddress[3] = 0;
5663 stc.laddr_type = SCTP_IPV4_ADDRESS;
5664 /* scope_id is only for v6 */
5666 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5667 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5670 /* Must use the address in this case */
5671 if (sctp_is_address_on_local_host(src, vrf_id)) {
5672 stc.loopback_scope = 1;
5675 stc.local_scope = 0;
5683 stc.addr_type = SCTP_IPV6_ADDRESS;
5684 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5685 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5686 if (sctp_is_address_on_local_host(src, vrf_id)) {
5687 stc.loopback_scope = 1;
5688 stc.local_scope = 0;
5691 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5692 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5694 * If the new destination or source
5695 * is a LINK_LOCAL we must have
5696 * common both site and local scope.
5697 * Don't set local scope though
5698 * since we must depend on the
5699 * source to be added implicitly. We
5700 * cannot assure just because we
5701 * share one link that all links are
5704 stc.local_scope = 0;
5708 * we start counting for the private
5709 * address stuff at 1. since the
5710 * link local we source from won't
5711 * show up in our scoped count.
5715 * pull out the scope_id from
5718 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5719 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5721 * If the new destination or source
5722 * is SITE_LOCAL then we must have
5723 * site scope in common.
5727 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5728 stc.laddr_type = SCTP_IPV6_ADDRESS;
5738 /* set the scope per the existing tcb */
5741 struct sctp_nets *lnet;
5744 stc.loopback_scope = asoc->scope.loopback_scope;
5745 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5746 stc.site_scope = asoc->scope.site_scope;
5747 stc.local_scope = asoc->scope.local_scope;
5749 /* Why do we not consider IPv4 LL addresses? */
5750 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5751 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5752 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5754 * if we have a LL address, start
5762 /* use the net pointer */
5763 to = (struct sockaddr *)&net->ro._l_addr;
5764 switch (to->sa_family) {
5767 sin = (struct sockaddr_in *)to;
5768 stc.address[0] = sin->sin_addr.s_addr;
5772 stc.addr_type = SCTP_IPV4_ADDRESS;
5773 if (net->src_addr_selected == 0) {
5775 * strange case here, the INIT should have
5776 * did the selection.
5778 net->ro._s_addr = sctp_source_address_selection(inp,
5779 stcb, (sctp_route_t *)&net->ro,
5781 if (net->ro._s_addr == NULL)
5784 net->src_addr_selected = 1;
5787 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5788 stc.laddress[1] = 0;
5789 stc.laddress[2] = 0;
5790 stc.laddress[3] = 0;
5791 stc.laddr_type = SCTP_IPV4_ADDRESS;
5792 /* scope_id is only for v6 */
5798 sin6 = (struct sockaddr_in6 *)to;
5799 memcpy(&stc.address, &sin6->sin6_addr,
5800 sizeof(struct in6_addr));
5801 stc.addr_type = SCTP_IPV6_ADDRESS;
5802 stc.scope_id = sin6->sin6_scope_id;
5803 if (net->src_addr_selected == 0) {
5805 * strange case here, the INIT should have
5806 * done the selection.
5808 net->ro._s_addr = sctp_source_address_selection(inp,
5809 stcb, (sctp_route_t *)&net->ro,
5811 if (net->ro._s_addr == NULL)
5814 net->src_addr_selected = 1;
5816 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5817 sizeof(struct in6_addr));
5818 stc.laddr_type = SCTP_IPV6_ADDRESS;
5823 /* Now lets put the SCTP header in place */
5824 initack = mtod(m, struct sctp_init_ack_chunk *);
5825 /* Save it off for quick ref */
5826 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5828 memcpy(stc.identification, SCTP_VERSION_STRING,
5829 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5830 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5831 /* now the chunk header */
5832 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5833 initack->ch.chunk_flags = 0;
5834 /* fill in later from mbuf we build */
5835 initack->ch.chunk_length = 0;
5836 /* place in my tag */
5837 if ((asoc != NULL) &&
5838 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5839 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5840 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5841 /* re-use the v-tags and init-seq here */
5842 initack->init.initiate_tag = htonl(asoc->my_vtag);
5843 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5845 uint32_t vtag, itsn;
5848 atomic_add_int(&asoc->refcnt, 1);
5849 SCTP_TCB_UNLOCK(stcb);
5851 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5852 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5854 * Got a duplicate vtag on some guy behind a
5855 * nat make sure we don't use it.
5859 initack->init.initiate_tag = htonl(vtag);
5860 /* get a TSN to use too */
5861 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5862 initack->init.initial_tsn = htonl(itsn);
5863 SCTP_TCB_LOCK(stcb);
5864 atomic_add_int(&asoc->refcnt, -1);
5866 SCTP_INP_INCR_REF(inp);
5867 SCTP_INP_RUNLOCK(inp);
5868 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5869 initack->init.initiate_tag = htonl(vtag);
5870 /* get a TSN to use too */
5871 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5872 SCTP_INP_RLOCK(inp);
5873 SCTP_INP_DECR_REF(inp);
5876 /* save away my tag to */
5877 stc.my_vtag = initack->init.initiate_tag;
5879 /* set up some of the credits. */
5880 so = inp->sctp_socket;
5882 /* memory problem */
5886 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5888 /* set what I want */
5889 his_limit = ntohs(init_chk->init.num_inbound_streams);
5890 /* choose what I want */
5892 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5893 i_want = asoc->streamoutcnt;
5895 i_want = asoc->pre_open_streams;
5898 i_want = inp->sctp_ep.pre_open_stream_count;
5900 if (his_limit < i_want) {
5901 /* I Want more :< */
5902 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5904 /* I can have what I want :> */
5905 initack->init.num_outbound_streams = htons(i_want);
5907 /* tell him his limit. */
5908 initack->init.num_inbound_streams =
5909 htons(inp->sctp_ep.max_open_streams_intome);
5911 /* adaptation layer indication parameter */
5912 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5913 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5914 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5915 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5916 ali->ph.param_length = htons(parameter_len);
5917 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5918 chunk_len += parameter_len;
5922 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5923 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5924 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5925 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5926 ph->param_type = htons(SCTP_ECN_CAPABLE);
5927 ph->param_length = htons(parameter_len);
5928 chunk_len += parameter_len;
5931 /* PR-SCTP supported parameter */
5932 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5933 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5934 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5935 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5936 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5937 ph->param_length = htons(parameter_len);
5938 chunk_len += parameter_len;
5941 /* Add NAT friendly parameter */
5943 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5944 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5945 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5946 ph->param_length = htons(parameter_len);
5947 chunk_len += parameter_len;
5950 /* And now tell the peer which extensions we support */
5952 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5953 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5954 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5955 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5956 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5957 ((asoc == NULL) && (inp->idata_supported == 1))) {
5958 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5961 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5962 ((asoc == NULL) && (inp->auth_supported == 1))) {
5963 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5965 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5966 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5967 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5968 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5970 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5971 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5972 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5974 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5975 ((asoc == NULL) && (inp->idata_supported == 1))) {
5976 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5978 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5979 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5980 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5982 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5983 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5984 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5987 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5988 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5989 pr_supported->ph.param_length = htons(parameter_len);
5990 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5991 chunk_len += parameter_len;
5994 /* add authentication parameters */
5995 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5996 ((asoc == NULL) && (inp->auth_supported == 1))) {
5997 struct sctp_auth_random *randp;
5998 struct sctp_auth_hmac_algo *hmacs;
5999 struct sctp_auth_chunk_list *chunks;
6001 if (padding_len > 0) {
6002 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6003 chunk_len += padding_len;
6006 /* generate and add RANDOM parameter */
6007 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6008 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
6009 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6010 randp->ph.param_type = htons(SCTP_RANDOM);
6011 randp->ph.param_length = htons(parameter_len);
6012 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6013 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6014 chunk_len += parameter_len;
6016 if (padding_len > 0) {
6017 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6018 chunk_len += padding_len;
6021 /* add HMAC_ALGO parameter */
6022 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6023 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6024 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6025 (uint8_t *)hmacs->hmac_ids);
6026 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6027 hmacs->ph.param_length = htons(parameter_len);
6028 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6029 chunk_len += parameter_len;
6031 if (padding_len > 0) {
6032 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6033 chunk_len += padding_len;
6036 /* add CHUNKS parameter */
6037 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6038 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6039 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6040 chunks->chunk_types);
6041 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6042 chunks->ph.param_length = htons(parameter_len);
6043 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6044 chunk_len += parameter_len;
6046 SCTP_BUF_LEN(m) = chunk_len;
6048 /* now the addresses */
6050 * To optimize this we could put the scoping stuff into a structure
6051 * and remove the individual uint8's from the stc structure. Then we
6052 * could just sifa in the address within the stc.. but for now this
6053 * is a quick hack to get the address stuff teased apart.
6055 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6056 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6057 scp.loopback_scope = stc.loopback_scope;
6058 scp.ipv4_local_scope = stc.ipv4_scope;
6059 scp.local_scope = stc.local_scope;
6060 scp.site_scope = stc.site_scope;
6061 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6063 &padding_len, &chunk_len);
6064 /* padding_len can only be positive, if no addresses have been added */
6065 if (padding_len > 0) {
6066 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6067 chunk_len += padding_len;
6068 SCTP_BUF_LEN(m) += padding_len;
6072 /* tack on the operational error if present */
6075 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6076 parameter_len += SCTP_BUF_LEN(m_tmp);
6078 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6079 SCTP_BUF_NEXT(m_last) = op_err;
6080 while (SCTP_BUF_NEXT(m_last) != NULL) {
6081 m_last = SCTP_BUF_NEXT(m_last);
6083 chunk_len += parameter_len;
6085 if (padding_len > 0) {
6086 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6087 if (m_last == NULL) {
6088 /* Houston we have a problem, no space */
6092 chunk_len += padding_len;
6095 /* Now we must build a cookie */
6096 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6097 if (m_cookie == NULL) {
6098 /* memory problem */
6102 /* Now append the cookie to the end and update the space/size */
6103 SCTP_BUF_NEXT(m_last) = m_cookie;
6105 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6106 parameter_len += SCTP_BUF_LEN(m_tmp);
6107 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6111 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6112 chunk_len += parameter_len;
6115 * Place in the size, but we don't include the last pad (if any) in
6118 initack->ch.chunk_length = htons(chunk_len);
6121 * Time to sign the cookie, we don't sign over the cookie signature
6122 * though thus we set trailer.
6124 (void)sctp_hmac_m(SCTP_HMAC,
6125 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6126 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6127 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6129 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6130 * here since the timer will drive a retranmission.
6132 if (padding_len > 0) {
6133 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6138 if (stc.loopback_scope) {
6139 over_addr = (union sctp_sockstore *)dst;
6144 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6146 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6149 SCTP_SO_NOT_LOCKED))) {
6150 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6151 if (error == ENOBUFS) {
6153 asoc->ifp_had_enobuf = 1;
6155 SCTP_STAT_INCR(sctps_lowlevelerr);
6159 asoc->ifp_had_enobuf = 0;
6162 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6167 sctp_prune_prsctp(struct sctp_tcb *stcb,
6168 struct sctp_association *asoc,
6169 struct sctp_sndrcvinfo *srcv,
6173 struct sctp_tmit_chunk *chk, *nchk;
6175 SCTP_TCB_LOCK_ASSERT(stcb);
6176 if ((asoc->prsctp_supported) &&
6177 (asoc->sent_queue_cnt_removeable > 0)) {
6178 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6180 * Look for chunks marked with the PR_SCTP flag AND
6181 * the buffer space flag. If the one being sent is
6182 * equal or greater priority then purge the old one
6183 * and free some space.
6185 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6187 * This one is PR-SCTP AND buffer space
6190 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6192 * Lower numbers equates to higher
6193 * priority so if the one we are
6194 * looking at has a larger or equal
6195 * priority we want to drop the data
6196 * and NOT retransmit it.
6200 * We release the book_size
6201 * if the mbuf is here
6206 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6210 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6213 freed_spc += ret_spc;
6214 if (freed_spc >= dataout) {
6217 } /* if chunk was present */
6218 } /* if of sufficient priority */
6219 } /* if chunk has enabled */
6220 } /* tailqforeach */
6222 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6223 /* Here we must move to the sent queue and mark */
6224 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6225 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6228 * We release the book_size
6229 * if the mbuf is here
6233 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6236 freed_spc += ret_spc;
6237 if (freed_spc >= dataout) {
6240 } /* end if chk->data */
6241 } /* end if right class */
6242 } /* end if chk pr-sctp */
6243 } /* tailqforeachsafe (chk) */
6244 } /* if enabled in asoc */
6248 sctp_get_frag_point(struct sctp_tcb *stcb,
6249 struct sctp_association *asoc)
6254 * For endpoints that have both v6 and v4 addresses we must reserve
6255 * room for the ipv6 header, for those that are only dealing with V4
6256 * we use a larger frag point.
6258 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6259 ovh = SCTP_MIN_OVERHEAD;
6261 ovh = SCTP_MIN_V4_OVERHEAD;
6263 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6264 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6265 siz = asoc->smallest_mtu - ovh;
6267 siz = (stcb->asoc.sctp_frag_point - ovh);
6269 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6271 /* A data chunk MUST fit in a cluster */
6272 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6275 /* adjust for an AUTH chunk if DATA requires auth */
6276 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6277 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6280 /* make it an even word boundary please */
6287 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6290 * We assume that the user wants PR_SCTP_TTL if the user provides a
6291 * positive lifetime but does not specify any PR_SCTP policy.
6293 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6294 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6295 } else if (sp->timetolive > 0) {
6296 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6297 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6301 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6302 case CHUNK_FLAGS_PR_SCTP_BUF:
6304 * Time to live is a priority stored in tv_sec when doing
6305 * the buffer drop thing.
6307 sp->ts.tv_sec = sp->timetolive;
6310 case CHUNK_FLAGS_PR_SCTP_TTL:
6314 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6315 tv.tv_sec = sp->timetolive / 1000;
6316 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6318 * TODO sctp_constants.h needs alternative time
6319 * macros when _KERNEL is undefined.
6321 timevaladd(&sp->ts, &tv);
6324 case CHUNK_FLAGS_PR_SCTP_RTX:
6326 * Time to live is a the number or retransmissions stored in
6329 sp->ts.tv_sec = sp->timetolive;
6333 SCTPDBG(SCTP_DEBUG_USRREQ1,
6334 "Unknown PR_SCTP policy %u.\n",
6335 PR_SCTP_POLICY(sp->sinfo_flags));
6341 sctp_msg_append(struct sctp_tcb *stcb,
6342 struct sctp_nets *net,
6344 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6348 struct sctp_stream_queue_pending *sp = NULL;
6349 struct sctp_stream_out *strm;
6352 * Given an mbuf chain, put it into the association send queue and
6353 * place it on the wheel
6355 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6356 /* Invalid stream number */
6357 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6361 if ((stcb->asoc.stream_locked) &&
6362 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6363 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6367 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6368 /* Now can we send this? */
6369 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6370 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6371 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6372 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6373 /* got data while shutting down */
6374 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6378 sctp_alloc_a_strmoq(stcb, sp);
6380 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6384 sp->sinfo_flags = srcv->sinfo_flags;
6385 sp->timetolive = srcv->sinfo_timetolive;
6386 sp->ppid = srcv->sinfo_ppid;
6387 sp->context = srcv->sinfo_context;
6389 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6391 atomic_add_int(&sp->net->ref_count, 1);
6395 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6396 sp->sid = srcv->sinfo_stream;
6397 sp->msg_is_complete = 1;
6398 sp->sender_all_done = 1;
6401 sp->tail_mbuf = NULL;
6402 sctp_set_prsctp_policy(sp);
6404 * We could in theory (for sendall) sifa the length in, but we would
6405 * still have to hunt through the chain since we need to setup the
6409 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6410 if (SCTP_BUF_NEXT(at) == NULL)
6412 sp->length += SCTP_BUF_LEN(at);
6414 if (srcv->sinfo_keynumber_valid) {
6415 sp->auth_keyid = srcv->sinfo_keynumber;
6417 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6419 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6420 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6421 sp->holds_key_ref = 1;
6423 if (hold_stcb_lock == 0) {
6424 SCTP_TCB_SEND_LOCK(stcb);
6426 sctp_snd_sb_alloc(stcb, sp->length);
6427 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6428 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6429 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6431 if (hold_stcb_lock == 0) {
6432 SCTP_TCB_SEND_UNLOCK(stcb);
6442 static struct mbuf *
6443 sctp_copy_mbufchain(struct mbuf *clonechain,
6444 struct mbuf *outchain,
6445 struct mbuf **endofchain,
6448 uint8_t copy_by_ref)
6451 struct mbuf *appendchain;
6455 if (endofchain == NULL) {
6459 sctp_m_freem(outchain);
6462 if (can_take_mbuf) {
6463 appendchain = clonechain;
6466 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6468 /* Its not in a cluster */
6469 if (*endofchain == NULL) {
6470 /* lets get a mbuf cluster */
6471 if (outchain == NULL) {
6472 /* This is the general case */
6474 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6475 if (outchain == NULL) {
6478 SCTP_BUF_LEN(outchain) = 0;
6479 *endofchain = outchain;
6480 /* get the prepend space */
6481 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6484 * We really should not get a NULL
6490 if (SCTP_BUF_NEXT(m) == NULL) {
6494 m = SCTP_BUF_NEXT(m);
6497 if (*endofchain == NULL) {
6499 * huh, TSNH XXX maybe we
6502 sctp_m_freem(outchain);
6506 /* get the new end of length */
6507 len = (int)M_TRAILINGSPACE(*endofchain);
6509 /* how much is left at the end? */
6510 len = (int)M_TRAILINGSPACE(*endofchain);
6512 /* Find the end of the data, for appending */
6513 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6515 /* Now lets copy it out */
6516 if (len >= sizeofcpy) {
6517 /* It all fits, copy it in */
6518 m_copydata(clonechain, 0, sizeofcpy, cp);
6519 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6521 /* fill up the end of the chain */
6523 m_copydata(clonechain, 0, len, cp);
6524 SCTP_BUF_LEN((*endofchain)) += len;
6525 /* now we need another one */
6528 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6533 SCTP_BUF_NEXT((*endofchain)) = m;
6535 cp = mtod((*endofchain), caddr_t);
6536 m_copydata(clonechain, len, sizeofcpy, cp);
6537 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6541 /* copy the old fashion way */
6542 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6543 #ifdef SCTP_MBUF_LOGGING
6544 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6545 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6550 if (appendchain == NULL) {
6553 sctp_m_freem(outchain);
6557 /* tack on to the end */
6558 if (*endofchain != NULL) {
6559 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6563 if (SCTP_BUF_NEXT(m) == NULL) {
6564 SCTP_BUF_NEXT(m) = appendchain;
6567 m = SCTP_BUF_NEXT(m);
6571 * save off the end and update the end-chain position
6575 if (SCTP_BUF_NEXT(m) == NULL) {
6579 m = SCTP_BUF_NEXT(m);
6583 /* save off the end and update the end-chain position */
6586 if (SCTP_BUF_NEXT(m) == NULL) {
6590 m = SCTP_BUF_NEXT(m);
6592 return (appendchain);
6597 sctp_med_chunk_output(struct sctp_inpcb *inp,
6598 struct sctp_tcb *stcb,
6599 struct sctp_association *asoc,
6602 int control_only, int from_where,
6603 struct timeval *now, int *now_filled, int frag_point, int so_locked
6604 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6610 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6611 uint32_t val SCTP_UNUSED)
6613 struct sctp_copy_all *ca;
6616 int added_control = 0;
6617 int un_sent, do_chunk_output = 1;
6618 struct sctp_association *asoc;
6619 struct sctp_nets *net;
6621 ca = (struct sctp_copy_all *)ptr;
6622 if (ca->m == NULL) {
6625 if (ca->inp != inp) {
6629 if (ca->sndlen > 0) {
6630 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6632 /* can't copy so we are done */
6636 #ifdef SCTP_MBUF_LOGGING
6637 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6638 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6644 SCTP_TCB_LOCK_ASSERT(stcb);
6645 if (stcb->asoc.alternate) {
6646 net = stcb->asoc.alternate;
6648 net = stcb->asoc.primary_destination;
6650 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6651 /* Abort this assoc with m as the user defined reason */
6653 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6655 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6656 0, M_NOWAIT, 1, MT_DATA);
6657 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6660 struct sctp_paramhdr *ph;
6662 ph = mtod(m, struct sctp_paramhdr *);
6663 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6664 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6667 * We add one here to keep the assoc from dis-appearing on
6670 atomic_add_int(&stcb->asoc.refcnt, 1);
6671 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6673 * sctp_abort_an_association calls sctp_free_asoc() free
6674 * association will NOT free it since we incremented the
6675 * refcnt .. we do this to prevent it being freed and things
6676 * getting tricky since we could end up (from free_asoc)
6677 * calling inpcb_free which would get a recursive lock call
6678 * to the iterator lock.. But as a consequence of that the
6679 * stcb will return to us un-locked.. since free_asoc
6680 * returns with either no TCB or the TCB unlocked, we must
6681 * relock.. to unlock in the iterator timer :-0
6683 SCTP_TCB_LOCK(stcb);
6684 atomic_add_int(&stcb->asoc.refcnt, -1);
6685 goto no_chunk_output;
6688 ret = sctp_msg_append(stcb, net, m,
6692 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6693 /* shutdown this assoc */
6694 if (TAILQ_EMPTY(&asoc->send_queue) &&
6695 TAILQ_EMPTY(&asoc->sent_queue) &&
6696 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6697 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6701 * there is nothing queued to send, so I'm
6704 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6705 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6706 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6708 * only send SHUTDOWN the first time
6711 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6712 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6714 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6715 sctp_stop_timers_for_shutdown(stcb);
6716 sctp_send_shutdown(stcb, net);
6717 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6719 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6720 asoc->primary_destination);
6722 do_chunk_output = 0;
6726 * we still got (or just got) data to send,
6727 * so set SHUTDOWN_PENDING
6730 * XXX sockets draft says that SCTP_EOF
6731 * should be sent with no data. currently,
6732 * we will allow user data to be sent first
6733 * and move to SHUTDOWN-PENDING
6735 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6736 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6737 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6738 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6739 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6741 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6742 if (TAILQ_EMPTY(&asoc->send_queue) &&
6743 TAILQ_EMPTY(&asoc->sent_queue) &&
6744 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6745 struct mbuf *op_err;
6746 char msg[SCTP_DIAG_INFO_LEN];
6749 snprintf(msg, sizeof(msg),
6750 "%s:%d at %s", __FILE__, __LINE__, __func__);
6751 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6753 atomic_add_int(&stcb->asoc.refcnt, 1);
6754 sctp_abort_an_association(stcb->sctp_ep, stcb,
6755 op_err, SCTP_SO_NOT_LOCKED);
6756 atomic_add_int(&stcb->asoc.refcnt, -1);
6757 goto no_chunk_output;
6759 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6760 asoc->primary_destination);
6766 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6767 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6769 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6770 (stcb->asoc.total_flight > 0) &&
6771 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6772 do_chunk_output = 0;
6774 if (do_chunk_output)
6775 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6776 else if (added_control) {
6777 int num_out, reason, now_filled = 0;
6781 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6782 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6783 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6794 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6796 struct sctp_copy_all *ca;
6798 ca = (struct sctp_copy_all *)ptr;
6800 * Do a notify here? Kacheong suggests that the notify be done at
6801 * the send time.. so you would push up a notification if any send
6802 * failed. Don't know if this is feasible since the only failures we
6803 * have is "memory" related and if you cannot get an mbuf to send
6804 * the data you surely can't get an mbuf to send up to notify the
6805 * user you can't send the data :->
6808 /* now free everything */
6809 sctp_m_freem(ca->m);
6810 SCTP_FREE(ca, SCTP_M_COPYAL);
6813 static struct mbuf *
6814 sctp_copy_out_all(struct uio *uio, int len)
6816 struct mbuf *ret, *at;
6817 int left, willcpy, cancpy, error;
6819 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6825 SCTP_BUF_LEN(ret) = 0;
6826 /* save space for the data chunk header */
6827 cancpy = (int)M_TRAILINGSPACE(ret);
6828 willcpy = min(cancpy, left);
6831 /* Align data to the end */
6832 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6838 SCTP_BUF_LEN(at) = willcpy;
6839 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6842 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6843 if (SCTP_BUF_NEXT(at) == NULL) {
6846 at = SCTP_BUF_NEXT(at);
6847 SCTP_BUF_LEN(at) = 0;
6848 cancpy = (int)M_TRAILINGSPACE(at);
6849 willcpy = min(cancpy, left);
6856 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6857 struct sctp_sndrcvinfo *srcv)
6860 struct sctp_copy_all *ca;
6862 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6869 memset(ca, 0, sizeof(struct sctp_copy_all));
6873 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6876 * take off the sendall flag, it would be bad if we failed to do
6879 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6880 /* get length and mbuf chain */
6882 ca->sndlen = (int)uio->uio_resid;
6883 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6884 if (ca->m == NULL) {
6885 SCTP_FREE(ca, SCTP_M_COPYAL);
6886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6890 /* Gather the length of the send */
6894 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6895 ca->sndlen += SCTP_BUF_LEN(mat);
6898 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6899 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6900 SCTP_ASOC_ANY_STATE,
6902 sctp_sendall_completes, inp, 1);
6904 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6905 SCTP_FREE(ca, SCTP_M_COPYAL);
6906 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6914 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6916 struct sctp_tmit_chunk *chk, *nchk;
6918 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6919 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6920 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6921 asoc->ctrl_queue_cnt--;
6923 sctp_m_freem(chk->data);
6926 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6932 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6934 struct sctp_association *asoc;
6935 struct sctp_tmit_chunk *chk, *nchk;
6936 struct sctp_asconf_chunk *acp;
6939 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6940 /* find SCTP_ASCONF chunk in queue */
6941 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6943 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6944 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6949 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6950 asoc->ctrl_queue_cnt--;
6952 sctp_m_freem(chk->data);
6955 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6962 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6963 struct sctp_association *asoc,
6964 struct sctp_tmit_chunk **data_list,
6966 struct sctp_nets *net)
6969 struct sctp_tmit_chunk *tp1;
6971 for (i = 0; i < bundle_at; i++) {
6972 /* off of the send queue */
6973 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6974 asoc->send_queue_cnt--;
6977 * Any chunk NOT 0 you zap the time chunk 0 gets
6978 * zapped or set based on if a RTO measurment is
6981 data_list[i]->do_rtt = 0;
6984 data_list[i]->sent_rcv_time = net->last_sent_time;
6985 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6986 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6987 if (data_list[i]->whoTo == NULL) {
6988 data_list[i]->whoTo = net;
6989 atomic_add_int(&net->ref_count, 1);
6991 /* on to the sent queue */
6992 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6993 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6994 struct sctp_tmit_chunk *tpp;
6996 /* need to move back */
6998 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
7000 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7004 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7007 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7009 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7014 /* This does not lower until the cum-ack passes it */
7015 asoc->sent_queue_cnt++;
7016 if ((asoc->peers_rwnd <= 0) &&
7017 (asoc->total_flight == 0) &&
7019 /* Mark the chunk as being a window probe */
7020 SCTP_STAT_INCR(sctps_windowprobed);
7022 #ifdef SCTP_AUDITING_ENABLED
7023 sctp_audit_log(0xC2, 3);
7025 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7026 data_list[i]->snd_count = 1;
7027 data_list[i]->rec.data.chunk_was_revoked = 0;
7028 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7029 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7030 data_list[i]->whoTo->flight_size,
7031 data_list[i]->book_size,
7032 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7033 data_list[i]->rec.data.tsn);
7035 sctp_flight_size_increase(data_list[i]);
7036 sctp_total_flight_increase(stcb, data_list[i]);
7037 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7038 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7039 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7041 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7042 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7043 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7044 /* SWS sender side engages */
7045 asoc->peers_rwnd = 0;
7048 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7049 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7054 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7055 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7060 struct sctp_tmit_chunk *chk, *nchk;
7062 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7063 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7064 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7065 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7066 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7067 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7068 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7069 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7070 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7071 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7072 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7073 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7074 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7075 /* Stray chunks must be cleaned up */
7077 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7078 asoc->ctrl_queue_cnt--;
7080 sctp_m_freem(chk->data);
7083 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7084 asoc->fwd_tsn_cnt--;
7086 sctp_free_a_chunk(stcb, chk, so_locked);
7087 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7088 /* special handling, we must look into the param */
7089 if (chk != asoc->str_reset) {
7090 goto clean_up_anyway;
7097 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7098 uint32_t space_left, uint32_t frag_point, int eeor_on)
7101 * Make a decision on if I should split a msg into multiple parts.
7102 * This is only asked of incomplete messages.
7106 * If we are doing EEOR we need to always send it if its the
7107 * entire thing, since it might be all the guy is putting in
7110 if (space_left >= length) {
7112 * If we have data outstanding,
7113 * we get another chance when the sack
7114 * arrives to transmit - wait for more data
7116 if (stcb->asoc.total_flight == 0) {
7118 * If nothing is in flight, we zero the
7126 /* You can fill the rest */
7127 return (space_left);
7131 * For those strange folk that make the send buffer
7132 * smaller than our fragmentation point, we can't
7133 * get a full msg in so we have to allow splitting.
7135 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7138 if ((length <= space_left) ||
7139 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7140 /* Sub-optimial residual don't split in non-eeor mode. */
7144 * If we reach here length is larger than the space_left. Do we wish
7145 * to split it for the sake of packet putting together?
7147 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7148 /* Its ok to split it */
7149 return (min(space_left, frag_point));
7151 /* Nope, can't split */
7156 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7157 struct sctp_stream_out *strq,
7158 uint32_t space_left,
7159 uint32_t frag_point,
7164 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7169 /* Move from the stream to the send_queue keeping track of the total */
7170 struct sctp_association *asoc;
7171 struct sctp_stream_queue_pending *sp;
7172 struct sctp_tmit_chunk *chk;
7173 struct sctp_data_chunk *dchkh = NULL;
7174 struct sctp_idata_chunk *ndchkh = NULL;
7175 uint32_t to_move, length;
7177 uint8_t rcv_flags = 0;
7179 uint8_t send_lock_up = 0;
7181 SCTP_TCB_LOCK_ASSERT(stcb);
7184 /* sa_ignore FREED_MEMORY */
7185 sp = TAILQ_FIRST(&strq->outqueue);
7187 if (send_lock_up == 0) {
7188 SCTP_TCB_SEND_LOCK(stcb);
7191 sp = TAILQ_FIRST(&strq->outqueue);
7195 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7196 (stcb->asoc.idata_supported == 0) &&
7197 (strq->last_msg_incomplete)) {
7198 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7200 strq->last_msg_incomplete);
7201 strq->last_msg_incomplete = 0;
7205 SCTP_TCB_SEND_UNLOCK(stcb);
7210 if ((sp->msg_is_complete) && (sp->length == 0)) {
7211 if (sp->sender_all_done) {
7213 * We are doing deferred cleanup. Last time through
7214 * when we took all the data the sender_all_done was
7217 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7218 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7219 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7220 sp->sender_all_done,
7222 sp->msg_is_complete,
7226 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7227 SCTP_TCB_SEND_LOCK(stcb);
7230 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7231 TAILQ_REMOVE(&strq->outqueue, sp, next);
7232 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7233 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7234 (strq->chunks_on_queues == 0) &&
7235 TAILQ_EMPTY(&strq->outqueue)) {
7236 stcb->asoc.trigger_reset = 1;
7239 sctp_free_remote_addr(sp->net);
7243 sctp_m_freem(sp->data);
7246 sctp_free_a_strmoq(stcb, sp, so_locked);
7247 /* we can't be locked to it */
7249 SCTP_TCB_SEND_UNLOCK(stcb);
7252 /* back to get the next msg */
7256 * sender just finished this but still holds a
7264 /* is there some to get */
7265 if (sp->length == 0) {
7270 } else if (sp->discard_rest) {
7271 if (send_lock_up == 0) {
7272 SCTP_TCB_SEND_LOCK(stcb);
7275 /* Whack down the size */
7276 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7277 if ((stcb->sctp_socket != NULL) &&
7278 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7279 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7280 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7283 sctp_m_freem(sp->data);
7285 sp->tail_mbuf = NULL;
7294 some_taken = sp->some_taken;
7296 length = sp->length;
7297 if (sp->msg_is_complete) {
7298 /* The message is complete */
7299 to_move = min(length, frag_point);
7300 if (to_move == length) {
7301 /* All of it fits in the MTU */
7302 if (sp->some_taken) {
7303 rcv_flags |= SCTP_DATA_LAST_FRAG;
7305 rcv_flags |= SCTP_DATA_NOT_FRAG;
7307 sp->put_last_out = 1;
7308 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7309 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7312 /* Not all of it fits, we fragment */
7313 if (sp->some_taken == 0) {
7314 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7319 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7322 * We use a snapshot of length in case it
7323 * is expanding during the compare.
7328 if (to_move >= llen) {
7330 if (send_lock_up == 0) {
7332 * We are taking all of an incomplete msg
7333 * thus we need a send lock.
7335 SCTP_TCB_SEND_LOCK(stcb);
7337 if (sp->msg_is_complete) {
7339 * the sender finished the
7346 if (sp->some_taken == 0) {
7347 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7351 /* Nothing to take. */
7358 /* If we reach here, we can copy out a chunk */
7359 sctp_alloc_a_chunk(stcb, chk);
7361 /* No chunk memory */
7367 * Setup for unordered if needed by looking at the user sent info
7370 if (sp->sinfo_flags & SCTP_UNORDERED) {
7371 rcv_flags |= SCTP_DATA_UNORDERED;
7373 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7374 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7375 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7377 /* clear out the chunk before setting up */
7378 memset(chk, 0, sizeof(*chk));
7379 chk->rec.data.rcv_flags = rcv_flags;
7381 if (to_move >= length) {
7382 /* we think we can steal the whole thing */
7383 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7384 SCTP_TCB_SEND_LOCK(stcb);
7387 if (to_move < sp->length) {
7388 /* bail, it changed */
7391 chk->data = sp->data;
7392 chk->last_mbuf = sp->tail_mbuf;
7393 /* register the stealing */
7394 sp->data = sp->tail_mbuf = NULL;
7399 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7400 chk->last_mbuf = NULL;
7401 if (chk->data == NULL) {
7402 sp->some_taken = some_taken;
7403 sctp_free_a_chunk(stcb, chk, so_locked);
7408 #ifdef SCTP_MBUF_LOGGING
7409 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7410 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7413 /* Pull off the data */
7414 m_adj(sp->data, to_move);
7415 /* Now lets work our way down and compact it */
7417 while (m && (SCTP_BUF_LEN(m) == 0)) {
7418 sp->data = SCTP_BUF_NEXT(m);
7419 SCTP_BUF_NEXT(m) = NULL;
7420 if (sp->tail_mbuf == m) {
7422 * Freeing tail? TSNH since
7423 * we supposedly were taking less
7424 * than the sp->length.
7427 panic("Huh, freing tail? - TSNH");
7429 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7430 sp->tail_mbuf = sp->data = NULL;
7439 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7440 chk->copy_by_ref = 1;
7442 chk->copy_by_ref = 0;
7445 * get last_mbuf and counts of mb usage This is ugly but hopefully
7446 * its only one mbuf.
7448 if (chk->last_mbuf == NULL) {
7449 chk->last_mbuf = chk->data;
7450 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7451 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7455 if (to_move > length) {
7456 /*- This should not happen either
7457 * since we always lower to_move to the size
7458 * of sp->length if its larger.
7461 panic("Huh, how can to_move be larger?");
7463 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7467 atomic_subtract_int(&sp->length, to_move);
7469 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7470 if (M_LEADINGSPACE(chk->data) < leading) {
7471 /* Not enough room for a chunk header, get some */
7474 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7477 * we're in trouble here. _PREPEND below will free
7478 * all the data if there is no leading space, so we
7479 * must put the data back and restore.
7481 if (send_lock_up == 0) {
7482 SCTP_TCB_SEND_LOCK(stcb);
7485 if (sp->data == NULL) {
7486 /* unsteal the data */
7487 sp->data = chk->data;
7488 sp->tail_mbuf = chk->last_mbuf;
7492 /* reassemble the data */
7494 sp->data = chk->data;
7495 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7497 sp->some_taken = some_taken;
7498 atomic_add_int(&sp->length, to_move);
7501 sctp_free_a_chunk(stcb, chk, so_locked);
7505 SCTP_BUF_LEN(m) = 0;
7506 SCTP_BUF_NEXT(m) = chk->data;
7508 M_ALIGN(chk->data, 4);
7511 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7512 if (chk->data == NULL) {
7513 /* HELP, TSNH since we assured it would not above? */
7515 panic("prepend failes HELP?");
7517 SCTP_PRINTF("prepend fails HELP?\n");
7518 sctp_free_a_chunk(stcb, chk, so_locked);
7524 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7525 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7526 chk->book_size_scale = 0;
7527 chk->sent = SCTP_DATAGRAM_UNSENT;
7530 chk->asoc = &stcb->asoc;
7531 chk->pad_inplace = 0;
7532 chk->no_fr_allowed = 0;
7533 if (stcb->asoc.idata_supported == 0) {
7534 if (rcv_flags & SCTP_DATA_UNORDERED) {
7535 /* Just use 0. The receiver ignores the values. */
7536 chk->rec.data.mid = 0;
7538 chk->rec.data.mid = strq->next_mid_ordered;
7539 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7540 strq->next_mid_ordered++;
7544 if (rcv_flags & SCTP_DATA_UNORDERED) {
7545 chk->rec.data.mid = strq->next_mid_unordered;
7546 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7547 strq->next_mid_unordered++;
7550 chk->rec.data.mid = strq->next_mid_ordered;
7551 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7552 strq->next_mid_ordered++;
7556 chk->rec.data.sid = sp->sid;
7557 chk->rec.data.ppid = sp->ppid;
7558 chk->rec.data.context = sp->context;
7559 chk->rec.data.doing_fast_retransmit = 0;
7561 chk->rec.data.timetodrop = sp->ts;
7562 chk->flags = sp->act_flags;
7565 chk->whoTo = sp->net;
7566 atomic_add_int(&chk->whoTo->ref_count, 1);
7570 if (sp->holds_key_ref) {
7571 chk->auth_keyid = sp->auth_keyid;
7572 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7573 chk->holds_key_ref = 1;
7575 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7576 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7577 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7578 (uint32_t)(uintptr_t)stcb, sp->length,
7579 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7582 if (stcb->asoc.idata_supported == 0) {
7583 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7585 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7588 * Put the rest of the things in place now. Size was done earlier in
7589 * previous loop prior to padding.
7592 #ifdef SCTP_ASOCLOG_OF_TSNS
7593 SCTP_TCB_LOCK_ASSERT(stcb);
7594 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7595 asoc->tsn_out_at = 0;
7596 asoc->tsn_out_wrapped = 1;
7598 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7599 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7600 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7601 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7602 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7603 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7604 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7605 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7608 if (stcb->asoc.idata_supported == 0) {
7609 dchkh->ch.chunk_type = SCTP_DATA;
7610 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7611 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7612 dchkh->dp.sid = htons(strq->sid);
7613 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7614 dchkh->dp.ppid = chk->rec.data.ppid;
7615 dchkh->ch.chunk_length = htons(chk->send_size);
7617 ndchkh->ch.chunk_type = SCTP_IDATA;
7618 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7619 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7620 ndchkh->dp.sid = htons(strq->sid);
7621 ndchkh->dp.reserved = htons(0);
7622 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7624 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7626 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7628 ndchkh->ch.chunk_length = htons(chk->send_size);
7630 /* Now advance the chk->send_size by the actual pad needed. */
7631 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7636 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7637 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7639 chk->last_mbuf = lm;
7640 chk->pad_inplace = 1;
7642 chk->send_size += pads;
7644 if (PR_SCTP_ENABLED(chk->flags)) {
7645 asoc->pr_sctp_cnt++;
7647 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7648 /* All done pull and kill the message */
7649 if (sp->put_last_out == 0) {
7650 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7651 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7652 sp->sender_all_done,
7654 sp->msg_is_complete,
7658 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7659 SCTP_TCB_SEND_LOCK(stcb);
7662 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7663 TAILQ_REMOVE(&strq->outqueue, sp, next);
7664 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7665 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7666 (strq->chunks_on_queues == 0) &&
7667 TAILQ_EMPTY(&strq->outqueue)) {
7668 stcb->asoc.trigger_reset = 1;
7671 sctp_free_remote_addr(sp->net);
7675 sctp_m_freem(sp->data);
7678 sctp_free_a_strmoq(stcb, sp, so_locked);
7680 asoc->chunks_on_out_queue++;
7681 strq->chunks_on_queues++;
7682 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7683 asoc->send_queue_cnt++;
7686 SCTP_TCB_SEND_UNLOCK(stcb);
7693 sctp_fill_outqueue(struct sctp_tcb *stcb,
7694 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7695 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7700 struct sctp_association *asoc;
7701 struct sctp_stream_out *strq;
7702 uint32_t space_left, moved, total_moved;
7705 SCTP_TCB_LOCK_ASSERT(stcb);
7708 switch (net->ro._l_addr.sa.sa_family) {
7711 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7716 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7721 space_left = net->mtu;
7724 /* Need an allowance for the data chunk header too */
7725 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7727 /* must make even word boundary */
7728 space_left &= 0xfffffffc;
7729 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7732 while ((space_left > 0) && (strq != NULL)) {
7733 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7734 &giveup, eeor_mode, &bail, so_locked);
7735 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7736 if ((giveup != 0) || (bail != 0)) {
7739 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7740 total_moved += moved;
7741 space_left -= moved;
7742 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7743 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7747 space_left &= 0xfffffffc;
7752 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7754 if (total_moved == 0) {
7755 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7756 (net == stcb->asoc.primary_destination)) {
7757 /* ran dry for primary network net */
7758 SCTP_STAT_INCR(sctps_primary_randry);
7759 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7760 /* ran dry with CMT on */
7761 SCTP_STAT_INCR(sctps_cmt_randry);
7767 sctp_fix_ecn_echo(struct sctp_association *asoc)
7769 struct sctp_tmit_chunk *chk;
7771 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7772 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7773 chk->sent = SCTP_DATAGRAM_UNSENT;
7779 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7781 struct sctp_association *asoc;
7782 struct sctp_tmit_chunk *chk;
7783 struct sctp_stream_queue_pending *sp;
7790 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7791 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7792 if (sp->net == net) {
7793 sctp_free_remote_addr(sp->net);
7798 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7799 if (chk->whoTo == net) {
7800 sctp_free_remote_addr(chk->whoTo);
7807 sctp_med_chunk_output(struct sctp_inpcb *inp,
7808 struct sctp_tcb *stcb,
7809 struct sctp_association *asoc,
7812 int control_only, int from_where,
7813 struct timeval *now, int *now_filled, int frag_point, int so_locked
7814 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7820 * Ok this is the generic chunk service queue. we must do the
7822 * - Service the stream queue that is next, moving any
7823 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7824 * LAST to the out queue in one pass) and assigning TSN's. This
7825 * only applys though if the peer does not support NDATA. For NDATA
7826 * chunks its ok to not send the entire message ;-)
7827 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7828 * fomulate and send the low level chunks. Making sure to combine
7829 * any control in the control chunk queue also.
7831 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7832 struct mbuf *outchain, *endoutchain;
7833 struct sctp_tmit_chunk *chk, *nchk;
7835 /* temp arrays for unlinking */
7836 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7837 int no_fragmentflg, error;
7838 unsigned int max_rwnd_per_dest, max_send_per_dest;
7839 int one_chunk, hbflag, skip_data_for_this_net;
7840 int asconf, cookie, no_out_cnt;
7841 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7842 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7844 uint32_t auth_offset = 0;
7845 struct sctp_auth_chunk *auth = NULL;
7846 uint16_t auth_keyid;
7847 int override_ok = 1;
7848 int skip_fill_up = 0;
7849 int data_auth_reqd = 0;
7852 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7859 auth_keyid = stcb->asoc.authinfo.active_keyid;
7860 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7861 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7862 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7867 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7869 * First lets prime the pump. For each destination, if there is room
7870 * in the flight size, attempt to pull an MTU's worth out of the
7871 * stream queues into the general send_queue
7873 #ifdef SCTP_AUDITING_ENABLED
7874 sctp_audit_log(0xC2, 2);
7876 SCTP_TCB_LOCK_ASSERT(stcb);
7883 /* Nothing to possible to send? */
7884 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7885 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7886 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7887 TAILQ_EMPTY(&asoc->send_queue) &&
7888 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7893 if (asoc->peers_rwnd == 0) {
7894 /* No room in peers rwnd */
7896 if (asoc->total_flight > 0) {
7897 /* we are allowed one chunk in flight */
7901 if (stcb->asoc.ecn_echo_cnt_onq) {
7902 /* Record where a sack goes, if any */
7903 if (no_data_chunks &&
7904 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7905 /* Nothing but ECNe to send - we don't do that */
7906 goto nothing_to_send;
7908 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7909 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7910 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7911 sack_goes_to = chk->whoTo;
7916 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7917 if (stcb->sctp_socket)
7918 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7920 max_send_per_dest = 0;
7921 if (no_data_chunks == 0) {
7922 /* How many non-directed chunks are there? */
7923 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7924 if (chk->whoTo == NULL) {
7926 * We already have non-directed chunks on
7927 * the queue, no need to do a fill-up.
7935 if ((no_data_chunks == 0) &&
7936 (skip_fill_up == 0) &&
7937 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7938 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7940 * This for loop we are in takes in each net, if
7941 * its's got space in cwnd and has data sent to it
7942 * (when CMT is off) then it calls
7943 * sctp_fill_outqueue for the net. This gets data on
7944 * the send queue for that network.
7946 * In sctp_fill_outqueue TSN's are assigned and data
7947 * is copied out of the stream buffers. Note mostly
7948 * copy by reference (we hope).
7950 net->window_probe = 0;
7951 if ((net != stcb->asoc.alternate) &&
7952 ((net->dest_state & SCTP_ADDR_PF) ||
7953 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7954 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7955 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7956 sctp_log_cwnd(stcb, net, 1,
7957 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7961 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7962 (net->flight_size == 0)) {
7963 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7965 if (net->flight_size >= net->cwnd) {
7966 /* skip this network, no room - can't fill */
7967 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7968 sctp_log_cwnd(stcb, net, 3,
7969 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7974 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7976 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7978 /* memory alloc failure */
7984 /* now service each destination and send out what we can for it */
7985 /* Nothing to send? */
7986 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7987 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7988 TAILQ_EMPTY(&asoc->send_queue)) {
7993 if (asoc->sctp_cmt_on_off > 0) {
7994 /* get the last start point */
7995 start_at = asoc->last_net_cmt_send_started;
7996 if (start_at == NULL) {
7997 /* null so to beginning */
7998 start_at = TAILQ_FIRST(&asoc->nets);
8000 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8001 if (start_at == NULL) {
8002 start_at = TAILQ_FIRST(&asoc->nets);
8005 asoc->last_net_cmt_send_started = start_at;
8007 start_at = TAILQ_FIRST(&asoc->nets);
8009 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8010 if (chk->whoTo == NULL) {
8011 if (asoc->alternate) {
8012 chk->whoTo = asoc->alternate;
8014 chk->whoTo = asoc->primary_destination;
8016 atomic_add_int(&chk->whoTo->ref_count, 1);
8019 old_start_at = NULL;
8020 again_one_more_time:
8021 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8022 /* how much can we send? */
8023 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8024 if (old_start_at && (old_start_at == net)) {
8025 /* through list ocmpletely. */
8029 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8030 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8031 (net->flight_size >= net->cwnd)) {
8033 * Nothing on control or asconf and flight is full,
8034 * we can skip even in the CMT case.
8039 endoutchain = outchain = NULL;
8042 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8043 skip_data_for_this_net = 1;
8045 skip_data_for_this_net = 0;
8047 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8050 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8055 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8065 if (mtu > asoc->peers_rwnd) {
8066 if (asoc->total_flight > 0) {
8067 /* We have a packet in flight somewhere */
8068 r_mtu = asoc->peers_rwnd;
8070 /* We are always allowed to send one MTU out */
8078 /************************/
8079 /* ASCONF transmission */
8080 /************************/
8081 /* Now first lets go through the asconf queue */
8082 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8083 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8086 if (chk->whoTo == NULL) {
8087 if (asoc->alternate == NULL) {
8088 if (asoc->primary_destination != net) {
8092 if (asoc->alternate != net) {
8097 if (chk->whoTo != net) {
8101 if (chk->data == NULL) {
8104 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8105 chk->sent != SCTP_DATAGRAM_RESEND) {
8109 * if no AUTH is yet included and this chunk
8110 * requires it, make sure to account for it. We
8111 * don't apply the size until the AUTH chunk is
8112 * actually added below in case there is no room for
8113 * this chunk. NOTE: we overload the use of "omtu"
8116 if ((auth == NULL) &&
8117 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8118 stcb->asoc.peer_auth_chunks)) {
8119 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8122 /* Here we do NOT factor the r_mtu */
8123 if ((chk->send_size < (int)(mtu - omtu)) ||
8124 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8126 * We probably should glom the mbuf chain
8127 * from the chk->data for control but the
8128 * problem is it becomes yet one more level
8129 * of tracking to do if for some reason
8130 * output fails. Then I have got to
8131 * reconstruct the merged control chain.. el
8132 * yucko.. for now we take the easy way and
8136 * Add an AUTH chunk, if chunk requires it
8137 * save the offset into the chain for AUTH
8139 if ((auth == NULL) &&
8140 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8141 stcb->asoc.peer_auth_chunks))) {
8142 outchain = sctp_add_auth_chunk(outchain,
8147 chk->rec.chunk_id.id);
8148 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8150 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8151 (int)chk->rec.chunk_id.can_take_data,
8152 chk->send_size, chk->copy_by_ref);
8153 if (outchain == NULL) {
8155 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8158 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8159 /* update our MTU size */
8160 if (mtu > (chk->send_size + omtu))
8161 mtu -= (chk->send_size + omtu);
8164 to_out += (chk->send_size + omtu);
8165 /* Do clear IP_DF ? */
8166 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8169 if (chk->rec.chunk_id.can_take_data)
8172 * set hb flag since we can use these for
8178 * should sysctl this: don't bundle data
8179 * with ASCONF since it requires AUTH
8182 chk->sent = SCTP_DATAGRAM_SENT;
8183 if (chk->whoTo == NULL) {
8185 atomic_add_int(&net->ref_count, 1);
8190 * Ok we are out of room but we can
8191 * output without effecting the
8192 * flight size since this little guy
8193 * is a control only packet.
8195 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8197 * do NOT clear the asconf flag as
8198 * it is used to do appropriate
8199 * source address selection.
8201 if (*now_filled == 0) {
8202 (void)SCTP_GETTIME_TIMEVAL(now);
8205 net->last_sent_time = *now;
8207 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8208 (struct sockaddr *)&net->ro._l_addr,
8209 outchain, auth_offset, auth,
8210 stcb->asoc.authinfo.active_keyid,
8211 no_fragmentflg, 0, asconf,
8212 inp->sctp_lport, stcb->rport,
8213 htonl(stcb->asoc.peer_vtag),
8218 * error, we could not
8221 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8222 if (from_where == 0) {
8223 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8225 if (error == ENOBUFS) {
8226 asoc->ifp_had_enobuf = 1;
8227 SCTP_STAT_INCR(sctps_lowlevelerr);
8229 /* error, could not output */
8230 if (error == EHOSTUNREACH) {
8236 sctp_move_chunks_from_net(stcb, net);
8241 asoc->ifp_had_enobuf = 0;
8244 * increase the number we sent, if a
8245 * cookie is sent we don't tell them
8248 outchain = endoutchain = NULL;
8252 *num_out += ctl_cnt;
8253 /* recalc a clean slate and setup */
8254 switch (net->ro._l_addr.sa.sa_family) {
8257 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8262 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8279 /************************/
8280 /* Control transmission */
8281 /************************/
8282 /* Now first lets go through the control queue */
8283 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8284 if ((sack_goes_to) &&
8285 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8286 (chk->whoTo != sack_goes_to)) {
8288 * if we have a sack in queue, and we are
8289 * looking at an ecn echo that is NOT queued
8290 * to where the sack is going..
8292 if (chk->whoTo == net) {
8294 * Don't transmit it to where its
8295 * going (current net)
8298 } else if (sack_goes_to == net) {
8300 * But do transmit it to this
8303 goto skip_net_check;
8306 if (chk->whoTo == NULL) {
8307 if (asoc->alternate == NULL) {
8308 if (asoc->primary_destination != net) {
8312 if (asoc->alternate != net) {
8317 if (chk->whoTo != net) {
8322 if (chk->data == NULL) {
8325 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8327 * It must be unsent. Cookies and ASCONF's
8328 * hang around but there timers will force
8329 * when marked for resend.
8334 * if no AUTH is yet included and this chunk
8335 * requires it, make sure to account for it. We
8336 * don't apply the size until the AUTH chunk is
8337 * actually added below in case there is no room for
8338 * this chunk. NOTE: we overload the use of "omtu"
8341 if ((auth == NULL) &&
8342 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8343 stcb->asoc.peer_auth_chunks)) {
8344 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8347 /* Here we do NOT factor the r_mtu */
8348 if ((chk->send_size <= (int)(mtu - omtu)) ||
8349 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8351 * We probably should glom the mbuf chain
8352 * from the chk->data for control but the
8353 * problem is it becomes yet one more level
8354 * of tracking to do if for some reason
8355 * output fails. Then I have got to
8356 * reconstruct the merged control chain.. el
8357 * yucko.. for now we take the easy way and
8361 * Add an AUTH chunk, if chunk requires it
8362 * save the offset into the chain for AUTH
8364 if ((auth == NULL) &&
8365 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8366 stcb->asoc.peer_auth_chunks))) {
8367 outchain = sctp_add_auth_chunk(outchain,
8372 chk->rec.chunk_id.id);
8373 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8375 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8376 (int)chk->rec.chunk_id.can_take_data,
8377 chk->send_size, chk->copy_by_ref);
8378 if (outchain == NULL) {
8380 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8383 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8384 /* update our MTU size */
8385 if (mtu > (chk->send_size + omtu))
8386 mtu -= (chk->send_size + omtu);
8389 to_out += (chk->send_size + omtu);
8390 /* Do clear IP_DF ? */
8391 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8394 if (chk->rec.chunk_id.can_take_data)
8396 /* Mark things to be removed, if needed */
8397 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8398 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8399 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8400 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8401 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8402 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8403 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8404 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8405 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8406 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8407 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8408 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8411 /* remove these chunks at the end */
8412 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8413 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8414 /* turn off the timer */
8415 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8416 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8418 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8424 * Other chunks, since they have
8425 * timers running (i.e. COOKIE) we
8426 * just "trust" that it gets sent or
8430 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8433 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8435 * Increment ecne send count
8436 * here this means we may be
8437 * over-zealous in our
8438 * counting if the send
8439 * fails, but its the best
8440 * place to do it (we used
8441 * to do it in the queue of
8442 * the chunk, but that did
8443 * not tell how many times
8446 SCTP_STAT_INCR(sctps_sendecne);
8448 chk->sent = SCTP_DATAGRAM_SENT;
8449 if (chk->whoTo == NULL) {
8451 atomic_add_int(&net->ref_count, 1);
8457 * Ok we are out of room but we can
8458 * output without effecting the
8459 * flight size since this little guy
8460 * is a control only packet.
8463 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8465 * do NOT clear the asconf
8466 * flag as it is used to do
8467 * appropriate source
8468 * address selection.
8472 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8475 /* Only HB or ASCONF advances time */
8477 if (*now_filled == 0) {
8478 (void)SCTP_GETTIME_TIMEVAL(now);
8481 net->last_sent_time = *now;
8484 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8485 (struct sockaddr *)&net->ro._l_addr,
8488 stcb->asoc.authinfo.active_keyid,
8489 no_fragmentflg, 0, asconf,
8490 inp->sctp_lport, stcb->rport,
8491 htonl(stcb->asoc.peer_vtag),
8496 * error, we could not
8499 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8500 if (from_where == 0) {
8501 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8503 if (error == ENOBUFS) {
8504 asoc->ifp_had_enobuf = 1;
8505 SCTP_STAT_INCR(sctps_lowlevelerr);
8507 if (error == EHOSTUNREACH) {
8513 sctp_move_chunks_from_net(stcb, net);
8518 asoc->ifp_had_enobuf = 0;
8521 * increase the number we sent, if a
8522 * cookie is sent we don't tell them
8525 outchain = endoutchain = NULL;
8529 *num_out += ctl_cnt;
8530 /* recalc a clean slate and setup */
8531 switch (net->ro._l_addr.sa.sa_family) {
8534 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8539 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8556 /* JRI: if dest is in PF state, do not send data to it */
8557 if ((asoc->sctp_cmt_on_off > 0) &&
8558 (net != stcb->asoc.alternate) &&
8559 (net->dest_state & SCTP_ADDR_PF)) {
8562 if (net->flight_size >= net->cwnd) {
8565 if ((asoc->sctp_cmt_on_off > 0) &&
8566 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8567 (net->flight_size > max_rwnd_per_dest)) {
8571 * We need a specific accounting for the usage of the send
8572 * buffer. We also need to check the number of messages per
8573 * net. For now, this is better than nothing and it disabled
8576 if ((asoc->sctp_cmt_on_off > 0) &&
8577 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8578 (max_send_per_dest > 0) &&
8579 (net->flight_size > max_send_per_dest)) {
8582 /*********************/
8583 /* Data transmission */
8584 /*********************/
8586 * if AUTH for DATA is required and no AUTH has been added
8587 * yet, account for this in the mtu now... if no data can be
8588 * bundled, this adjustment won't matter anyways since the
8589 * packet will be going out...
8591 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8592 stcb->asoc.peer_auth_chunks);
8593 if (data_auth_reqd && (auth == NULL)) {
8594 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8596 /* now lets add any data within the MTU constraints */
8597 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8600 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8601 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8608 if (net->mtu > SCTP_MIN_OVERHEAD)
8609 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8619 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8620 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8621 (skip_data_for_this_net == 0)) ||
8623 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8624 if (no_data_chunks) {
8625 /* let only control go out */
8629 if (net->flight_size >= net->cwnd) {
8630 /* skip this net, no room for data */
8634 if ((chk->whoTo != NULL) &&
8635 (chk->whoTo != net)) {
8636 /* Don't send the chunk on this net */
8640 if (asoc->sctp_cmt_on_off == 0) {
8641 if ((asoc->alternate) &&
8642 (asoc->alternate != net) &&
8643 (chk->whoTo == NULL)) {
8645 } else if ((net != asoc->primary_destination) &&
8646 (asoc->alternate == NULL) &&
8647 (chk->whoTo == NULL)) {
8651 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8653 * strange, we have a chunk that is
8654 * to big for its destination and
8655 * yet no fragment ok flag.
8656 * Something went wrong when the
8657 * PMTU changed...we did not mark
8658 * this chunk for some reason?? I
8659 * will fix it here by letting IP
8660 * fragment it for now and printing
8661 * a warning. This really should not
8664 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8665 chk->send_size, mtu);
8666 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8668 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8669 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8670 struct sctp_data_chunk *dchkh;
8672 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8673 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8675 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8676 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8677 /* ok we will add this one */
8680 * Add an AUTH chunk, if chunk
8681 * requires it, save the offset into
8682 * the chain for AUTH
8684 if (data_auth_reqd) {
8686 outchain = sctp_add_auth_chunk(outchain,
8692 auth_keyid = chk->auth_keyid;
8694 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8695 } else if (override_ok) {
8700 auth_keyid = chk->auth_keyid;
8702 } else if (auth_keyid != chk->auth_keyid) {
8710 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8711 chk->send_size, chk->copy_by_ref);
8712 if (outchain == NULL) {
8713 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8714 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8715 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8718 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8721 /* upate our MTU size */
8722 /* Do clear IP_DF ? */
8723 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8726 /* unsigned subtraction of mtu */
8727 if (mtu > chk->send_size)
8728 mtu -= chk->send_size;
8731 /* unsigned subtraction of r_mtu */
8732 if (r_mtu > chk->send_size)
8733 r_mtu -= chk->send_size;
8737 to_out += chk->send_size;
8738 if ((to_out > mx_mtu) && no_fragmentflg) {
8740 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8742 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8746 chk->window_probe = 0;
8747 data_list[bundle_at++] = chk;
8748 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8751 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8752 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8753 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8755 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8757 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8758 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8768 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8770 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8771 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8772 data_list[0]->window_probe = 1;
8773 net->window_probe = 1;
8779 * Must be sent in order of the
8780 * TSN's (on a network)
8784 } /* for (chunk gather loop for this net) */
8785 } /* if asoc.state OPEN */
8787 /* Is there something to send for this destination? */
8789 /* We may need to start a control timer or two */
8791 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8794 * do NOT clear the asconf flag as it is
8795 * used to do appropriate source address
8800 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8803 /* must start a send timer if data is being sent */
8804 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8806 * no timer running on this destination
8809 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8811 if (bundle_at || hbflag) {
8812 /* For data/asconf and hb set time */
8813 if (*now_filled == 0) {
8814 (void)SCTP_GETTIME_TIMEVAL(now);
8817 net->last_sent_time = *now;
8819 /* Now send it, if there is anything to send :> */
8820 if ((error = sctp_lowlevel_chunk_output(inp,
8823 (struct sockaddr *)&net->ro._l_addr,
8831 inp->sctp_lport, stcb->rport,
8832 htonl(stcb->asoc.peer_vtag),
8836 /* error, we could not output */
8837 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8838 if (from_where == 0) {
8839 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8841 if (error == ENOBUFS) {
8842 asoc->ifp_had_enobuf = 1;
8843 SCTP_STAT_INCR(sctps_lowlevelerr);
8845 if (error == EHOSTUNREACH) {
8847 * Destination went unreachable
8850 sctp_move_chunks_from_net(stcb, net);
8854 * I add this line to be paranoid. As far as
8855 * I can tell the continue, takes us back to
8856 * the top of the for, but just to make sure
8857 * I will reset these again here.
8859 ctl_cnt = bundle_at = 0;
8860 continue; /* This takes us back to the
8861 * for() for the nets. */
8863 asoc->ifp_had_enobuf = 0;
8869 *num_out += (ctl_cnt + bundle_at);
8872 /* setup for a RTO measurement */
8873 tsns_sent = data_list[0]->rec.data.tsn;
8874 /* fill time if not already filled */
8875 if (*now_filled == 0) {
8876 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8878 *now = asoc->time_last_sent;
8880 asoc->time_last_sent = *now;
8882 if (net->rto_needed) {
8883 data_list[0]->do_rtt = 1;
8884 net->rto_needed = 0;
8886 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8887 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8893 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8894 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8897 if (old_start_at == NULL) {
8898 old_start_at = start_at;
8899 start_at = TAILQ_FIRST(&asoc->nets);
8901 goto again_one_more_time;
8905 * At the end there should be no NON timed chunks hanging on this
8908 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8909 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8911 if ((*num_out == 0) && (*reason_code == 0)) {
8916 sctp_clean_up_ctl(stcb, asoc, so_locked);
8921 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8924 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8925 * the control chunk queue.
8927 struct sctp_chunkhdr *hdr;
8928 struct sctp_tmit_chunk *chk;
8929 struct mbuf *mat, *last_mbuf;
8930 uint32_t chunk_length;
8931 uint16_t padding_length;
8933 SCTP_TCB_LOCK_ASSERT(stcb);
8934 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8935 if (op_err == NULL) {
8940 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8941 chunk_length += SCTP_BUF_LEN(mat);
8942 if (SCTP_BUF_NEXT(mat) == NULL) {
8946 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8947 sctp_m_freem(op_err);
8950 padding_length = chunk_length % 4;
8951 if (padding_length != 0) {
8952 padding_length = 4 - padding_length;
8954 if (padding_length != 0) {
8955 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8956 sctp_m_freem(op_err);
8960 sctp_alloc_a_chunk(stcb, chk);
8963 sctp_m_freem(op_err);
8966 chk->copy_by_ref = 0;
8967 chk->send_size = (uint16_t)chunk_length;
8968 chk->sent = SCTP_DATAGRAM_UNSENT;
8970 chk->asoc = &stcb->asoc;
8973 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8974 chk->rec.chunk_id.can_take_data = 0;
8975 hdr = mtod(op_err, struct sctp_chunkhdr *);
8976 hdr->chunk_type = SCTP_OPERATION_ERROR;
8977 hdr->chunk_flags = 0;
8978 hdr->chunk_length = htons(chk->send_size);
8979 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8980 chk->asoc->ctrl_queue_cnt++;
8984 sctp_send_cookie_echo(struct mbuf *m,
8986 struct sctp_tcb *stcb,
8987 struct sctp_nets *net)
8990 * pull out the cookie and put it at the front of the control chunk
8994 struct mbuf *cookie;
8995 struct sctp_paramhdr param, *phdr;
8996 struct sctp_chunkhdr *hdr;
8997 struct sctp_tmit_chunk *chk;
8998 uint16_t ptype, plen;
9000 SCTP_TCB_LOCK_ASSERT(stcb);
9001 /* First find the cookie in the param area */
9003 at = offset + sizeof(struct sctp_init_chunk);
9005 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
9009 ptype = ntohs(phdr->param_type);
9010 plen = ntohs(phdr->param_length);
9011 if (ptype == SCTP_STATE_COOKIE) {
9014 /* found the cookie */
9015 if ((pad = (plen % 4))) {
9018 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9019 if (cookie == NULL) {
9023 #ifdef SCTP_MBUF_LOGGING
9024 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9025 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9030 at += SCTP_SIZE32(plen);
9032 /* ok, we got the cookie lets change it into a cookie echo chunk */
9033 /* first the change from param to cookie */
9034 hdr = mtod(cookie, struct sctp_chunkhdr *);
9035 hdr->chunk_type = SCTP_COOKIE_ECHO;
9036 hdr->chunk_flags = 0;
9037 /* get the chunk stuff now and place it in the FRONT of the queue */
9038 sctp_alloc_a_chunk(stcb, chk);
9041 sctp_m_freem(cookie);
9044 chk->copy_by_ref = 0;
9045 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9046 chk->rec.chunk_id.can_take_data = 0;
9047 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9048 chk->send_size = plen;
9049 chk->sent = SCTP_DATAGRAM_UNSENT;
9051 chk->asoc = &stcb->asoc;
9054 atomic_add_int(&chk->whoTo->ref_count, 1);
9055 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9056 chk->asoc->ctrl_queue_cnt++;
9061 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9065 struct sctp_nets *net)
9068 * take a HB request and make it into a HB ack and send it.
9070 struct mbuf *outchain;
9071 struct sctp_chunkhdr *chdr;
9072 struct sctp_tmit_chunk *chk;
9076 /* must have a net pointer */
9079 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9080 if (outchain == NULL) {
9081 /* gak out of memory */
9084 #ifdef SCTP_MBUF_LOGGING
9085 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9086 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9089 chdr = mtod(outchain, struct sctp_chunkhdr *);
9090 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9091 chdr->chunk_flags = 0;
9092 if (chk_length % 4) {
9094 uint32_t cpthis = 0;
9097 padlen = 4 - (chk_length % 4);
9098 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9100 sctp_alloc_a_chunk(stcb, chk);
9103 sctp_m_freem(outchain);
9106 chk->copy_by_ref = 0;
9107 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9108 chk->rec.chunk_id.can_take_data = 1;
9110 chk->send_size = chk_length;
9111 chk->sent = SCTP_DATAGRAM_UNSENT;
9113 chk->asoc = &stcb->asoc;
9114 chk->data = outchain;
9116 atomic_add_int(&chk->whoTo->ref_count, 1);
9117 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9118 chk->asoc->ctrl_queue_cnt++;
9122 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9124 /* formulate and queue a cookie-ack back to sender */
9125 struct mbuf *cookie_ack;
9126 struct sctp_chunkhdr *hdr;
9127 struct sctp_tmit_chunk *chk;
9129 SCTP_TCB_LOCK_ASSERT(stcb);
9131 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9132 if (cookie_ack == NULL) {
9136 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9137 sctp_alloc_a_chunk(stcb, chk);
9140 sctp_m_freem(cookie_ack);
9143 chk->copy_by_ref = 0;
9144 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9145 chk->rec.chunk_id.can_take_data = 1;
9147 chk->send_size = sizeof(struct sctp_chunkhdr);
9148 chk->sent = SCTP_DATAGRAM_UNSENT;
9150 chk->asoc = &stcb->asoc;
9151 chk->data = cookie_ack;
9152 if (chk->asoc->last_control_chunk_from != NULL) {
9153 chk->whoTo = chk->asoc->last_control_chunk_from;
9154 atomic_add_int(&chk->whoTo->ref_count, 1);
9158 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9159 hdr->chunk_type = SCTP_COOKIE_ACK;
9160 hdr->chunk_flags = 0;
9161 hdr->chunk_length = htons(chk->send_size);
9162 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9163 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9164 chk->asoc->ctrl_queue_cnt++;
9170 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9172 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9173 struct mbuf *m_shutdown_ack;
9174 struct sctp_shutdown_ack_chunk *ack_cp;
9175 struct sctp_tmit_chunk *chk;
9177 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9178 if (m_shutdown_ack == NULL) {
9182 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9183 sctp_alloc_a_chunk(stcb, chk);
9186 sctp_m_freem(m_shutdown_ack);
9189 chk->copy_by_ref = 0;
9190 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9191 chk->rec.chunk_id.can_take_data = 1;
9193 chk->send_size = sizeof(struct sctp_chunkhdr);
9194 chk->sent = SCTP_DATAGRAM_UNSENT;
9197 chk->asoc = &stcb->asoc;
9198 chk->data = m_shutdown_ack;
9201 atomic_add_int(&chk->whoTo->ref_count, 1);
9203 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9204 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9205 ack_cp->ch.chunk_flags = 0;
9206 ack_cp->ch.chunk_length = htons(chk->send_size);
9207 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9208 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9209 chk->asoc->ctrl_queue_cnt++;
9214 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9216 /* formulate and queue a SHUTDOWN to the sender */
9217 struct mbuf *m_shutdown;
9218 struct sctp_shutdown_chunk *shutdown_cp;
9219 struct sctp_tmit_chunk *chk;
9221 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9222 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9223 /* We already have a SHUTDOWN queued. Reuse it. */
9225 sctp_free_remote_addr(chk->whoTo);
9232 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9233 if (m_shutdown == NULL) {
9237 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9238 sctp_alloc_a_chunk(stcb, chk);
9241 sctp_m_freem(m_shutdown);
9244 chk->copy_by_ref = 0;
9245 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9246 chk->rec.chunk_id.can_take_data = 1;
9248 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9249 chk->sent = SCTP_DATAGRAM_UNSENT;
9252 chk->asoc = &stcb->asoc;
9253 chk->data = m_shutdown;
9256 atomic_add_int(&chk->whoTo->ref_count, 1);
9258 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9259 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9260 shutdown_cp->ch.chunk_flags = 0;
9261 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9262 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9263 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9264 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9265 chk->asoc->ctrl_queue_cnt++;
9267 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9270 atomic_add_int(&chk->whoTo->ref_count, 1);
9272 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9273 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9274 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9280 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9283 * formulate and queue an ASCONF to the peer. ASCONF parameters
9284 * should be queued on the assoc queue.
9286 struct sctp_tmit_chunk *chk;
9287 struct mbuf *m_asconf;
9290 SCTP_TCB_LOCK_ASSERT(stcb);
9292 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9293 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9294 /* can't send a new one if there is one in flight already */
9298 /* compose an ASCONF chunk, maximum length is PMTU */
9299 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9300 if (m_asconf == NULL) {
9304 sctp_alloc_a_chunk(stcb, chk);
9307 sctp_m_freem(m_asconf);
9311 chk->copy_by_ref = 0;
9312 chk->rec.chunk_id.id = SCTP_ASCONF;
9313 chk->rec.chunk_id.can_take_data = 0;
9314 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9315 chk->data = m_asconf;
9316 chk->send_size = len;
9317 chk->sent = SCTP_DATAGRAM_UNSENT;
9319 chk->asoc = &stcb->asoc;
9322 atomic_add_int(&chk->whoTo->ref_count, 1);
9324 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9325 chk->asoc->ctrl_queue_cnt++;
9330 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9333 * formulate and queue a asconf-ack back to sender. the asconf-ack
9334 * must be stored in the tcb.
9336 struct sctp_tmit_chunk *chk;
9337 struct sctp_asconf_ack *ack, *latest_ack;
9339 struct sctp_nets *net = NULL;
9341 SCTP_TCB_LOCK_ASSERT(stcb);
9342 /* Get the latest ASCONF-ACK */
9343 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9344 if (latest_ack == NULL) {
9347 if (latest_ack->last_sent_to != NULL &&
9348 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9349 /* we're doing a retransmission */
9350 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9353 if (stcb->asoc.last_control_chunk_from == NULL) {
9354 if (stcb->asoc.alternate) {
9355 net = stcb->asoc.alternate;
9357 net = stcb->asoc.primary_destination;
9360 net = stcb->asoc.last_control_chunk_from;
9365 if (stcb->asoc.last_control_chunk_from == NULL) {
9366 if (stcb->asoc.alternate) {
9367 net = stcb->asoc.alternate;
9369 net = stcb->asoc.primary_destination;
9372 net = stcb->asoc.last_control_chunk_from;
9375 latest_ack->last_sent_to = net;
9377 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9378 if (ack->data == NULL) {
9382 /* copy the asconf_ack */
9383 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9384 if (m_ack == NULL) {
9385 /* couldn't copy it */
9388 #ifdef SCTP_MBUF_LOGGING
9389 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9390 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9394 sctp_alloc_a_chunk(stcb, chk);
9398 sctp_m_freem(m_ack);
9401 chk->copy_by_ref = 0;
9402 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9403 chk->rec.chunk_id.can_take_data = 1;
9404 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9407 atomic_add_int(&chk->whoTo->ref_count, 1);
9410 chk->send_size = ack->len;
9411 chk->sent = SCTP_DATAGRAM_UNSENT;
9413 chk->asoc = &stcb->asoc;
9415 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9416 chk->asoc->ctrl_queue_cnt++;
9423 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9424 struct sctp_tcb *stcb,
9425 struct sctp_association *asoc,
9426 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9427 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9433 * send out one MTU of retransmission. If fast_retransmit is
9434 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9435 * rwnd. For a Cookie or Asconf in the control chunk queue we
9436 * retransmit them by themselves.
9438 * For data chunks we will pick out the lowest TSN's in the sent_queue
9439 * marked for resend and bundle them all together (up to a MTU of
9440 * destination). The address to send to should have been
9441 * selected/changed where the retransmission was marked (i.e. in FR
9442 * or t3-timeout routines).
9444 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9445 struct sctp_tmit_chunk *chk, *fwd;
9446 struct mbuf *m, *endofchain;
9447 struct sctp_nets *net = NULL;
9448 uint32_t tsns_sent = 0;
9449 int no_fragmentflg, bundle_at, cnt_thru;
9451 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9452 struct sctp_auth_chunk *auth = NULL;
9453 uint32_t auth_offset = 0;
9454 uint16_t auth_keyid;
9455 int override_ok = 1;
9456 int data_auth_reqd = 0;
9459 SCTP_TCB_LOCK_ASSERT(stcb);
9460 tmr_started = ctl_cnt = bundle_at = error = 0;
9465 endofchain = m = NULL;
9466 auth_keyid = stcb->asoc.authinfo.active_keyid;
9467 #ifdef SCTP_AUDITING_ENABLED
9468 sctp_audit_log(0xC3, 1);
9470 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9471 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9472 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9473 asoc->sent_queue_retran_cnt);
9474 asoc->sent_queue_cnt = 0;
9475 asoc->sent_queue_cnt_removeable = 0;
9476 /* send back 0/0 so we enter normal transmission */
9480 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9481 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9482 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9483 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9484 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9487 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9488 if (chk != asoc->str_reset) {
9490 * not eligible for retran if its
9497 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9501 * Add an AUTH chunk, if chunk requires it save the
9502 * offset into the chain for AUTH
9504 if ((auth == NULL) &&
9505 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9506 stcb->asoc.peer_auth_chunks))) {
9507 m = sctp_add_auth_chunk(m, &endofchain,
9508 &auth, &auth_offset,
9510 chk->rec.chunk_id.id);
9511 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9513 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9519 /* do we have control chunks to retransmit? */
9521 /* Start a timer no matter if we succeed or fail */
9522 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9523 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9524 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9525 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9526 chk->snd_count++; /* update our count */
9527 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9528 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9529 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9530 no_fragmentflg, 0, 0,
9531 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9532 chk->whoTo->port, NULL,
9535 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9536 if (error == ENOBUFS) {
9537 asoc->ifp_had_enobuf = 1;
9538 SCTP_STAT_INCR(sctps_lowlevelerr);
9542 asoc->ifp_had_enobuf = 0;
9548 * We don't want to mark the net->sent time here since this
9549 * we use this for HB and retrans cannot measure RTT
9551 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9553 chk->sent = SCTP_DATAGRAM_SENT;
9554 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9558 /* Clean up the fwd-tsn list */
9559 sctp_clean_up_ctl(stcb, asoc, so_locked);
9564 * Ok, it is just data retransmission we need to do or that and a
9565 * fwd-tsn with it all.
9567 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9568 return (SCTP_RETRAN_DONE);
9570 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9571 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9572 /* not yet open, resend the cookie and that is it */
9575 #ifdef SCTP_AUDITING_ENABLED
9576 sctp_auditing(20, inp, stcb, NULL);
9578 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9579 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9580 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9581 /* No, not sent to this net or not ready for rtx */
9584 if (chk->data == NULL) {
9585 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9586 chk->rec.data.tsn, chk->snd_count, chk->sent);
9589 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9590 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9591 struct mbuf *op_err;
9592 char msg[SCTP_DIAG_INFO_LEN];
9594 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9595 chk->rec.data.tsn, chk->snd_count);
9596 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9598 atomic_add_int(&stcb->asoc.refcnt, 1);
9599 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9601 SCTP_TCB_LOCK(stcb);
9602 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9603 return (SCTP_RETRAN_EXIT);
9605 /* pick up the net */
9607 switch (net->ro._l_addr.sa.sa_family) {
9610 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9615 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9624 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9625 /* No room in peers rwnd */
9628 tsn = asoc->last_acked_seq + 1;
9629 if (tsn == chk->rec.data.tsn) {
9631 * we make a special exception for this
9632 * case. The peer has no rwnd but is missing
9633 * the lowest chunk.. which is probably what
9634 * is holding up the rwnd.
9636 goto one_chunk_around;
9641 if (asoc->peers_rwnd < mtu) {
9643 if ((asoc->peers_rwnd == 0) &&
9644 (asoc->total_flight == 0)) {
9645 chk->window_probe = 1;
9646 chk->whoTo->window_probe = 1;
9649 #ifdef SCTP_AUDITING_ENABLED
9650 sctp_audit_log(0xC3, 2);
9654 net->fast_retran_ip = 0;
9655 if (chk->rec.data.doing_fast_retransmit == 0) {
9657 * if no FR in progress skip destination that have
9658 * flight_size > cwnd.
9660 if (net->flight_size >= net->cwnd) {
9665 * Mark the destination net to have FR recovery
9669 net->fast_retran_ip = 1;
9673 * if no AUTH is yet included and this chunk requires it,
9674 * make sure to account for it. We don't apply the size
9675 * until the AUTH chunk is actually added below in case
9676 * there is no room for this chunk.
9678 if (data_auth_reqd && (auth == NULL)) {
9679 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9683 if ((chk->send_size <= (mtu - dmtu)) ||
9684 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9685 /* ok we will add this one */
9686 if (data_auth_reqd) {
9688 m = sctp_add_auth_chunk(m,
9694 auth_keyid = chk->auth_keyid;
9696 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9697 } else if (override_ok) {
9698 auth_keyid = chk->auth_keyid;
9700 } else if (chk->auth_keyid != auth_keyid) {
9701 /* different keyid, so done bundling */
9705 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9707 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9710 /* Do clear IP_DF ? */
9711 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9714 /* upate our MTU size */
9715 if (mtu > (chk->send_size + dmtu))
9716 mtu -= (chk->send_size + dmtu);
9719 data_list[bundle_at++] = chk;
9720 if (one_chunk && (asoc->total_flight <= 0)) {
9721 SCTP_STAT_INCR(sctps_windowprobed);
9724 if (one_chunk == 0) {
9726 * now are there anymore forward from chk to pick
9729 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9730 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9731 /* Nope, not for retran */
9734 if (fwd->whoTo != net) {
9735 /* Nope, not the net in question */
9738 if (data_auth_reqd && (auth == NULL)) {
9739 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9742 if (fwd->send_size <= (mtu - dmtu)) {
9743 if (data_auth_reqd) {
9745 m = sctp_add_auth_chunk(m,
9751 auth_keyid = fwd->auth_keyid;
9753 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9754 } else if (override_ok) {
9755 auth_keyid = fwd->auth_keyid;
9757 } else if (fwd->auth_keyid != auth_keyid) {
9765 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9767 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9770 /* Do clear IP_DF ? */
9771 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9774 /* upate our MTU size */
9775 if (mtu > (fwd->send_size + dmtu))
9776 mtu -= (fwd->send_size + dmtu);
9779 data_list[bundle_at++] = fwd;
9780 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9784 /* can't fit so we are done */
9789 /* Is there something to send for this destination? */
9792 * No matter if we fail/or succeed we should start a
9793 * timer. A failure is like a lost IP packet :-)
9795 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9797 * no timer running on this destination
9800 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9803 /* Now lets send it, if there is anything to send :> */
9804 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9805 (struct sockaddr *)&net->ro._l_addr, m,
9806 auth_offset, auth, auth_keyid,
9807 no_fragmentflg, 0, 0,
9808 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9812 /* error, we could not output */
9813 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9814 if (error == ENOBUFS) {
9815 asoc->ifp_had_enobuf = 1;
9816 SCTP_STAT_INCR(sctps_lowlevelerr);
9820 asoc->ifp_had_enobuf = 0;
9827 * We don't want to mark the net->sent time here
9828 * since this we use this for HB and retrans cannot
9831 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9833 /* For auto-close */
9835 if (*now_filled == 0) {
9836 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9837 *now = asoc->time_last_sent;
9840 asoc->time_last_sent = *now;
9842 *cnt_out += bundle_at;
9843 #ifdef SCTP_AUDITING_ENABLED
9844 sctp_audit_log(0xC4, bundle_at);
9847 tsns_sent = data_list[0]->rec.data.tsn;
9849 for (i = 0; i < bundle_at; i++) {
9850 SCTP_STAT_INCR(sctps_sendretransdata);
9851 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9853 * When we have a revoked data, and we
9854 * retransmit it, then we clear the revoked
9855 * flag since this flag dictates if we
9856 * subtracted from the fs
9858 if (data_list[i]->rec.data.chunk_was_revoked) {
9859 /* Deflate the cwnd */
9860 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9861 data_list[i]->rec.data.chunk_was_revoked = 0;
9863 data_list[i]->snd_count++;
9864 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9865 /* record the time */
9866 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9867 if (data_list[i]->book_size_scale) {
9869 * need to double the book size on
9872 data_list[i]->book_size_scale = 0;
9874 * Since we double the booksize, we
9875 * must also double the output queue
9876 * size, since this get shrunk when
9877 * we free by this amount.
9879 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9880 data_list[i]->book_size *= 2;
9884 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9885 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9886 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9888 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9889 (uint32_t)(data_list[i]->send_size +
9890 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9892 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9893 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9894 data_list[i]->whoTo->flight_size,
9895 data_list[i]->book_size,
9896 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9897 data_list[i]->rec.data.tsn);
9899 sctp_flight_size_increase(data_list[i]);
9900 sctp_total_flight_increase(stcb, data_list[i]);
9901 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9902 /* SWS sender side engages */
9903 asoc->peers_rwnd = 0;
9906 (data_list[i]->rec.data.doing_fast_retransmit)) {
9907 SCTP_STAT_INCR(sctps_sendfastretrans);
9908 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9909 (tmr_started == 0)) {
9911 * ok we just fast-retrans'd
9912 * the lowest TSN, i.e the
9913 * first on the list. In
9914 * this case we want to give
9915 * some more time to get a
9916 * SACK back without a
9919 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9920 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9921 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9925 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9926 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9928 #ifdef SCTP_AUDITING_ENABLED
9929 sctp_auditing(21, inp, stcb, NULL);
9935 if (asoc->sent_queue_retran_cnt <= 0) {
9936 /* all done we have no more to retran */
9937 asoc->sent_queue_retran_cnt = 0;
9941 /* No more room in rwnd */
9944 /* stop the for loop here. we sent out a packet */
9951 sctp_timer_validation(struct sctp_inpcb *inp,
9952 struct sctp_tcb *stcb,
9953 struct sctp_association *asoc)
9955 struct sctp_nets *net;
9957 /* Validate that a timer is running somewhere */
9958 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9959 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9960 /* Here is a timer */
9964 SCTP_TCB_LOCK_ASSERT(stcb);
9965 /* Gak, we did not have a timer somewhere */
9966 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9967 if (asoc->alternate) {
9968 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9970 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9976 sctp_chunk_output(struct sctp_inpcb *inp,
9977 struct sctp_tcb *stcb,
9980 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9986 * Ok this is the generic chunk service queue. we must do the
9988 * - See if there are retransmits pending, if so we must
9990 * - Service the stream queue that is next, moving any
9991 * message (note I must get a complete message i.e.
9992 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9994 * - Check to see if the cwnd/rwnd allows any output, if so we
9995 * go ahead and fomulate and send the low level chunks. Making sure
9996 * to combine any control in the control chunk queue also.
9998 struct sctp_association *asoc;
9999 struct sctp_nets *net;
10000 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
10001 unsigned int burst_cnt = 0;
10002 struct timeval now;
10003 int now_filled = 0;
10005 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10008 unsigned int tot_frs = 0;
10010 asoc = &stcb->asoc;
10012 /* The Nagle algorithm is only applied when handling a send call. */
10013 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10014 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10022 SCTP_TCB_LOCK_ASSERT(stcb);
10024 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10026 if ((un_sent <= 0) &&
10027 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10028 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10029 (asoc->sent_queue_retran_cnt == 0) &&
10030 (asoc->trigger_reset == 0)) {
10031 /* Nothing to do unless there is something to be sent left */
10035 * Do we have something to send, data or control AND a sack timer
10036 * running, if so piggy-back the sack.
10038 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10039 sctp_send_sack(stcb, so_locked);
10040 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10042 while (asoc->sent_queue_retran_cnt) {
10044 * Ok, it is retransmission time only, we send out only ONE
10045 * packet with a single call off to the retran code.
10047 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10049 * Special hook for handling cookiess discarded
10050 * by peer that carried data. Send cookie-ack only
10051 * and then the next call with get the retran's.
10053 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10055 &now, &now_filled, frag_point, so_locked);
10057 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10058 /* if its not from a HB then do it */
10060 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10066 * its from any other place, we don't allow retran
10067 * output (only control)
10072 /* Can't send anymore */
10074 * now lets push out control by calling med-level
10075 * output once. this assures that we WILL send HB's
10078 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10080 &now, &now_filled, frag_point, so_locked);
10081 #ifdef SCTP_AUDITING_ENABLED
10082 sctp_auditing(8, inp, stcb, NULL);
10084 sctp_timer_validation(inp, stcb, asoc);
10089 * The count was off.. retran is not happening so do
10090 * the normal retransmission.
10092 #ifdef SCTP_AUDITING_ENABLED
10093 sctp_auditing(9, inp, stcb, NULL);
10095 if (ret == SCTP_RETRAN_EXIT) {
10100 if (from_where == SCTP_OUTPUT_FROM_T3) {
10101 /* Only one transmission allowed out of a timeout */
10102 #ifdef SCTP_AUDITING_ENABLED
10103 sctp_auditing(10, inp, stcb, NULL);
10105 /* Push out any control */
10106 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10107 &now, &now_filled, frag_point, so_locked);
10110 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10111 /* Hit FR burst limit */
10114 if ((num_out == 0) && (ret == 0)) {
10115 /* No more retrans to send */
10119 #ifdef SCTP_AUDITING_ENABLED
10120 sctp_auditing(12, inp, stcb, NULL);
10122 /* Check for bad destinations, if they exist move chunks around. */
10123 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10124 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10126 * if possible move things off of this address we
10127 * still may send below due to the dormant state but
10128 * we try to find an alternate address to send to
10129 * and if we have one we move all queued data on the
10130 * out wheel to this alternate address.
10132 if (net->ref_count > 1)
10133 sctp_move_chunks_from_net(stcb, net);
10136 * if ((asoc->sat_network) || (net->addr_is_local))
10137 * { burst_limit = asoc->max_burst *
10138 * SCTP_SAT_NETWORK_BURST_INCR; }
10140 if (asoc->max_burst > 0) {
10141 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10142 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10144 * JRS - Use the congestion
10145 * control given in the
10146 * congestion control module
10148 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10149 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10150 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10152 SCTP_STAT_INCR(sctps_maxburstqueued);
10154 net->fast_retran_ip = 0;
10156 if (net->flight_size == 0) {
10158 * Should be decaying the
10170 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10171 &reason_code, 0, from_where,
10172 &now, &now_filled, frag_point, so_locked);
10174 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10175 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10176 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10178 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10179 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10180 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10184 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10186 tot_out += num_out;
10188 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10189 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10190 if (num_out == 0) {
10191 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10196 * When the Nagle algorithm is used, look at how
10197 * much is unsent, then if its smaller than an MTU
10198 * and we have data in flight we stop, except if we
10199 * are handling a fragmented user message.
10201 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10202 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10203 (stcb->asoc.total_flight > 0)) {
10204 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10208 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10209 TAILQ_EMPTY(&asoc->send_queue) &&
10210 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10211 /* Nothing left to send */
10214 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10215 /* Nothing left to send */
10218 } while (num_out &&
10219 ((asoc->max_burst == 0) ||
10220 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10221 (burst_cnt < asoc->max_burst)));
10223 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10224 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10225 SCTP_STAT_INCR(sctps_maxburstqueued);
10226 asoc->burst_limit_applied = 1;
10227 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10228 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10231 asoc->burst_limit_applied = 0;
10234 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10235 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10237 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10241 * Now we need to clean up the control chunk chain if a ECNE is on
10242 * it. It must be marked as UNSENT again so next call will continue
10243 * to send it until such time that we get a CWR, to remove it.
10245 if (stcb->asoc.ecn_echo_cnt_onq)
10246 sctp_fix_ecn_echo(asoc);
10248 if (stcb->asoc.trigger_reset) {
10249 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10259 struct sctp_inpcb *inp,
10261 struct sockaddr *addr,
10262 struct mbuf *control,
10267 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10271 if (inp->sctp_socket == NULL) {
10272 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10275 return (sctp_sosend(inp->sctp_socket,
10277 (struct uio *)NULL,
10285 send_forward_tsn(struct sctp_tcb *stcb,
10286 struct sctp_association *asoc)
10288 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10289 struct sctp_forward_tsn_chunk *fwdtsn;
10290 struct sctp_strseq *strseq;
10291 struct sctp_strseq_mid *strseq_m;
10292 uint32_t advance_peer_ack_point;
10293 unsigned int cnt_of_space, i, ovh;
10294 unsigned int space_needed;
10295 unsigned int cnt_of_skipped = 0;
10297 SCTP_TCB_LOCK_ASSERT(stcb);
10298 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10299 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10300 /* mark it to unsent */
10301 chk->sent = SCTP_DATAGRAM_UNSENT;
10302 chk->snd_count = 0;
10303 /* Do we correct its output location? */
10305 sctp_free_remote_addr(chk->whoTo);
10308 goto sctp_fill_in_rest;
10311 /* Ok if we reach here we must build one */
10312 sctp_alloc_a_chunk(stcb, chk);
10316 asoc->fwd_tsn_cnt++;
10317 chk->copy_by_ref = 0;
10319 * We don't do the old thing here since this is used not for on-wire
10320 * but to tell if we are sending a fwd-tsn by the stack during
10321 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10323 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10324 chk->rec.chunk_id.can_take_data = 0;
10328 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10329 if (chk->data == NULL) {
10330 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10333 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10334 chk->sent = SCTP_DATAGRAM_UNSENT;
10335 chk->snd_count = 0;
10336 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10337 asoc->ctrl_queue_cnt++;
10340 * Here we go through and fill out the part that deals with
10341 * stream/seq of the ones we skip.
10343 SCTP_BUF_LEN(chk->data) = 0;
10344 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10345 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10346 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10347 /* no more to look at */
10350 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10351 /* We don't report these */
10356 if (asoc->idata_supported) {
10357 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10358 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10360 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10361 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10363 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10365 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10366 ovh = SCTP_MIN_OVERHEAD;
10368 ovh = SCTP_MIN_V4_OVERHEAD;
10370 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10371 /* trim to a mtu size */
10372 cnt_of_space = asoc->smallest_mtu - ovh;
10374 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10375 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10376 0xff, 0, cnt_of_skipped,
10377 asoc->advanced_peer_ack_point);
10379 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10380 if (cnt_of_space < space_needed) {
10382 * ok we must trim down the chunk by lowering the
10383 * advance peer ack point.
10385 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10386 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10387 0xff, 0xff, cnt_of_space,
10390 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10391 if (asoc->idata_supported) {
10392 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10394 cnt_of_skipped /= sizeof(struct sctp_strseq);
10397 * Go through and find the TSN that will be the one
10400 at = TAILQ_FIRST(&asoc->sent_queue);
10402 for (i = 0; i < cnt_of_skipped; i++) {
10403 tp1 = TAILQ_NEXT(at, sctp_next);
10410 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10411 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10412 0xff, cnt_of_skipped, at->rec.data.tsn,
10413 asoc->advanced_peer_ack_point);
10417 * last now points to last one I can report, update
10421 advance_peer_ack_point = last->rec.data.tsn;
10423 if (asoc->idata_supported) {
10424 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10425 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10427 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10428 cnt_of_skipped * sizeof(struct sctp_strseq);
10431 chk->send_size = space_needed;
10432 /* Setup the chunk */
10433 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10434 fwdtsn->ch.chunk_length = htons(chk->send_size);
10435 fwdtsn->ch.chunk_flags = 0;
10436 if (asoc->idata_supported) {
10437 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10439 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10441 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10442 SCTP_BUF_LEN(chk->data) = chk->send_size;
10445 * Move pointer to after the fwdtsn and transfer to the
10448 if (asoc->idata_supported) {
10449 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10452 strseq = (struct sctp_strseq *)fwdtsn;
10456 * Now populate the strseq list. This is done blindly
10457 * without pulling out duplicate stream info. This is
10458 * inefficent but won't harm the process since the peer will
10459 * look at these in sequence and will thus release anything.
10460 * It could mean we exceed the PMTU and chop off some that
10461 * we could have included.. but this is unlikely (aka 1432/4
10462 * would mean 300+ stream seq's would have to be reported in
10463 * one FWD-TSN. With a bit of work we can later FIX this to
10464 * optimize and pull out duplicates.. but it does add more
10465 * overhead. So for now... not!
10468 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10469 if (i >= cnt_of_skipped) {
10472 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10473 /* We don't report these */
10476 if (at->rec.data.tsn == advance_peer_ack_point) {
10477 at->rec.data.fwd_tsn_cnt = 0;
10479 if (asoc->idata_supported) {
10480 strseq_m->sid = htons(at->rec.data.sid);
10481 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10482 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10484 strseq_m->flags = 0;
10486 strseq_m->mid = htonl(at->rec.data.mid);
10489 strseq->sid = htons(at->rec.data.sid);
10490 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10499 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10500 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10506 * Queue up a SACK or NR-SACK in the control queue.
10507 * We must first check to see if a SACK or NR-SACK is
10508 * somehow on the control queue.
10509 * If so, we will take and and remove the old one.
10511 struct sctp_association *asoc;
10512 struct sctp_tmit_chunk *chk, *a_chk;
10513 struct sctp_sack_chunk *sack;
10514 struct sctp_nr_sack_chunk *nr_sack;
10515 struct sctp_gap_ack_block *gap_descriptor;
10516 const struct sack_track *selector;
10521 int limit_reached = 0;
10522 unsigned int i, siz, j;
10523 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10526 uint32_t highest_tsn;
10531 if (stcb->asoc.nrsack_supported == 1) {
10532 type = SCTP_NR_SELECTIVE_ACK;
10534 type = SCTP_SELECTIVE_ACK;
10537 asoc = &stcb->asoc;
10538 SCTP_TCB_LOCK_ASSERT(stcb);
10539 if (asoc->last_data_chunk_from == NULL) {
10540 /* Hmm we never received anything */
10543 sctp_slide_mapping_arrays(stcb);
10544 sctp_set_rwnd(stcb, asoc);
10545 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10546 if (chk->rec.chunk_id.id == type) {
10547 /* Hmm, found a sack already on queue, remove it */
10548 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10549 asoc->ctrl_queue_cnt--;
10552 sctp_m_freem(a_chk->data);
10553 a_chk->data = NULL;
10555 if (a_chk->whoTo) {
10556 sctp_free_remote_addr(a_chk->whoTo);
10557 a_chk->whoTo = NULL;
10562 if (a_chk == NULL) {
10563 sctp_alloc_a_chunk(stcb, a_chk);
10564 if (a_chk == NULL) {
10565 /* No memory so we drop the idea, and set a timer */
10566 if (stcb->asoc.delayed_ack) {
10567 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10568 stcb->sctp_ep, stcb, NULL,
10569 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10570 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10571 stcb->sctp_ep, stcb, NULL);
10573 stcb->asoc.send_sack = 1;
10577 a_chk->copy_by_ref = 0;
10578 a_chk->rec.chunk_id.id = type;
10579 a_chk->rec.chunk_id.can_take_data = 1;
10581 /* Clear our pkt counts */
10582 asoc->data_pkts_seen = 0;
10585 a_chk->asoc = asoc;
10586 a_chk->snd_count = 0;
10587 a_chk->send_size = 0; /* fill in later */
10588 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10589 a_chk->whoTo = NULL;
10591 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10593 * Ok, the destination for the SACK is unreachable, lets see if
10594 * we can select an alternate to asoc->last_data_chunk_from
10596 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10597 if (a_chk->whoTo == NULL) {
10598 /* Nope, no alternate */
10599 a_chk->whoTo = asoc->last_data_chunk_from;
10602 a_chk->whoTo = asoc->last_data_chunk_from;
10604 if (a_chk->whoTo) {
10605 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10607 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10608 highest_tsn = asoc->highest_tsn_inside_map;
10610 highest_tsn = asoc->highest_tsn_inside_nr_map;
10612 if (highest_tsn == asoc->cumulative_tsn) {
10614 if (type == SCTP_SELECTIVE_ACK) {
10615 space_req = sizeof(struct sctp_sack_chunk);
10617 space_req = sizeof(struct sctp_nr_sack_chunk);
10620 /* gaps get a cluster */
10621 space_req = MCLBYTES;
10623 /* Ok now lets formulate a MBUF with our sack */
10624 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10625 if ((a_chk->data == NULL) ||
10626 (a_chk->whoTo == NULL)) {
10627 /* rats, no mbuf memory */
10629 /* was a problem with the destination */
10630 sctp_m_freem(a_chk->data);
10631 a_chk->data = NULL;
10633 sctp_free_a_chunk(stcb, a_chk, so_locked);
10634 /* sa_ignore NO_NULL_CHK */
10635 if (stcb->asoc.delayed_ack) {
10636 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10637 stcb->sctp_ep, stcb, NULL,
10638 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10639 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10640 stcb->sctp_ep, stcb, NULL);
10642 stcb->asoc.send_sack = 1;
10646 /* ok, lets go through and fill it in */
10647 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10648 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10649 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10650 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10652 limit = mtod(a_chk->data, caddr_t);
10657 if ((asoc->sctp_cmt_on_off > 0) &&
10658 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10660 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10661 * received, then set high bit to 1, else 0. Reset
10664 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10665 asoc->cmt_dac_pkts_rcvd = 0;
10667 #ifdef SCTP_ASOCLOG_OF_TSNS
10668 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10669 stcb->asoc.cumack_log_atsnt++;
10670 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10671 stcb->asoc.cumack_log_atsnt = 0;
10674 /* reset the readers interpretation */
10675 stcb->freed_by_sorcv_sincelast = 0;
10677 if (type == SCTP_SELECTIVE_ACK) {
10678 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10680 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10681 if (highest_tsn > asoc->mapping_array_base_tsn) {
10682 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10684 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10688 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10689 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10690 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10691 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10693 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10697 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10700 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10702 if (((type == SCTP_SELECTIVE_ACK) &&
10703 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10704 ((type == SCTP_NR_SELECTIVE_ACK) &&
10705 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10706 /* we have a gap .. maybe */
10707 for (i = 0; i < siz; i++) {
10708 tsn_map = asoc->mapping_array[i];
10709 if (type == SCTP_SELECTIVE_ACK) {
10710 tsn_map |= asoc->nr_mapping_array[i];
10714 * Clear all bits corresponding to TSNs
10715 * smaller or equal to the cumulative TSN.
10717 tsn_map &= (~0U << (1 - offset));
10719 selector = &sack_array[tsn_map];
10720 if (mergeable && selector->right_edge) {
10722 * Backup, left and right edges were ok to
10728 if (selector->num_entries == 0)
10731 for (j = 0; j < selector->num_entries; j++) {
10732 if (mergeable && selector->right_edge) {
10734 * do a merge by NOT setting
10740 * no merge, set the left
10744 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10746 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10749 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10755 if (selector->left_edge) {
10759 if (limit_reached) {
10760 /* Reached the limit stop */
10766 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10767 (limit_reached == 0)) {
10771 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10772 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10774 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10777 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10780 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10782 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10783 /* we have a gap .. maybe */
10784 for (i = 0; i < siz; i++) {
10785 tsn_map = asoc->nr_mapping_array[i];
10788 * Clear all bits corresponding to
10789 * TSNs smaller or equal to the
10792 tsn_map &= (~0U << (1 - offset));
10794 selector = &sack_array[tsn_map];
10795 if (mergeable && selector->right_edge) {
10797 * Backup, left and right edges were
10800 num_nr_gap_blocks--;
10803 if (selector->num_entries == 0)
10806 for (j = 0; j < selector->num_entries; j++) {
10807 if (mergeable && selector->right_edge) {
10809 * do a merge by NOT
10816 * no merge, set the
10820 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10822 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10823 num_nr_gap_blocks++;
10825 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10831 if (selector->left_edge) {
10835 if (limit_reached) {
10836 /* Reached the limit stop */
10843 /* now we must add any dups we are going to report. */
10844 if ((limit_reached == 0) && (asoc->numduptsns)) {
10845 dup = (uint32_t *)gap_descriptor;
10846 for (i = 0; i < asoc->numduptsns; i++) {
10847 *dup = htonl(asoc->dup_tsns[i]);
10850 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10855 asoc->numduptsns = 0;
10858 * now that the chunk is prepared queue it to the control chunk
10861 if (type == SCTP_SELECTIVE_ACK) {
10862 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10863 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10864 num_dups * sizeof(int32_t));
10865 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10866 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10867 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10868 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10869 sack->sack.num_dup_tsns = htons(num_dups);
10870 sack->ch.chunk_type = type;
10871 sack->ch.chunk_flags = flags;
10872 sack->ch.chunk_length = htons(a_chk->send_size);
10874 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10875 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10876 num_dups * sizeof(int32_t));
10877 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10878 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10879 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10880 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10881 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10882 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10883 nr_sack->nr_sack.reserved = 0;
10884 nr_sack->ch.chunk_type = type;
10885 nr_sack->ch.chunk_flags = flags;
10886 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10888 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10889 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10890 asoc->ctrl_queue_cnt++;
10891 asoc->send_sack = 0;
10892 SCTP_STAT_INCR(sctps_sendsacks);
10897 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10898 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10903 struct mbuf *m_abort, *m, *m_last;
10904 struct mbuf *m_out, *m_end = NULL;
10905 struct sctp_abort_chunk *abort;
10906 struct sctp_auth_chunk *auth = NULL;
10907 struct sctp_nets *net;
10909 uint32_t auth_offset = 0;
10911 uint16_t cause_len, chunk_len, padding_len;
10913 SCTP_TCB_LOCK_ASSERT(stcb);
10915 * Add an AUTH chunk, if chunk requires it and save the offset into
10916 * the chain for AUTH
10918 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10919 stcb->asoc.peer_auth_chunks)) {
10920 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10921 stcb, SCTP_ABORT_ASSOCIATION);
10922 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10926 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10927 if (m_abort == NULL) {
10929 sctp_m_freem(m_out);
10932 sctp_m_freem(operr);
10936 /* link in any error */
10937 SCTP_BUF_NEXT(m_abort) = operr;
10940 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10941 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10942 if (SCTP_BUF_NEXT(m) == NULL) {
10946 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10947 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10948 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10949 if (m_out == NULL) {
10950 /* NO Auth chunk prepended, so reserve space in front */
10951 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10954 /* Put AUTH chunk at the front of the chain */
10955 SCTP_BUF_NEXT(m_end) = m_abort;
10957 if (stcb->asoc.alternate) {
10958 net = stcb->asoc.alternate;
10960 net = stcb->asoc.primary_destination;
10962 /* Fill in the ABORT chunk header. */
10963 abort = mtod(m_abort, struct sctp_abort_chunk *);
10964 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10965 if (stcb->asoc.peer_vtag == 0) {
10966 /* This happens iff the assoc is in COOKIE-WAIT state. */
10967 vtag = stcb->asoc.my_vtag;
10968 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10970 vtag = stcb->asoc.peer_vtag;
10971 abort->ch.chunk_flags = 0;
10973 abort->ch.chunk_length = htons(chunk_len);
10974 /* Add padding, if necessary. */
10975 if (padding_len > 0) {
10976 if ((m_last == NULL) ||
10977 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10978 sctp_m_freem(m_out);
10982 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10983 (struct sockaddr *)&net->ro._l_addr,
10984 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10985 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10986 stcb->asoc.primary_destination->port, NULL,
10989 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10990 if (error == ENOBUFS) {
10991 stcb->asoc.ifp_had_enobuf = 1;
10992 SCTP_STAT_INCR(sctps_lowlevelerr);
10995 stcb->asoc.ifp_had_enobuf = 0;
10997 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11001 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11002 struct sctp_nets *net,
11005 /* formulate and SEND a SHUTDOWN-COMPLETE */
11006 struct mbuf *m_shutdown_comp;
11007 struct sctp_shutdown_complete_chunk *shutdown_complete;
11012 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11013 if (m_shutdown_comp == NULL) {
11017 if (reflect_vtag) {
11018 flags = SCTP_HAD_NO_TCB;
11019 vtag = stcb->asoc.my_vtag;
11022 vtag = stcb->asoc.peer_vtag;
11024 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11025 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11026 shutdown_complete->ch.chunk_flags = flags;
11027 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11028 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11029 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11030 (struct sockaddr *)&net->ro._l_addr,
11031 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11032 stcb->sctp_ep->sctp_lport, stcb->rport,
11036 SCTP_SO_NOT_LOCKED))) {
11037 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11038 if (error == ENOBUFS) {
11039 stcb->asoc.ifp_had_enobuf = 1;
11040 SCTP_STAT_INCR(sctps_lowlevelerr);
11043 stcb->asoc.ifp_had_enobuf = 0;
11045 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11050 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11051 struct sctphdr *sh, uint32_t vtag,
11052 uint8_t type, struct mbuf *cause,
11053 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11054 uint32_t vrf_id, uint16_t port)
11056 struct mbuf *o_pak;
11058 struct sctphdr *shout;
11059 struct sctp_chunkhdr *ch;
11060 #if defined(INET) || defined(INET6)
11061 struct udphdr *udp;
11063 int ret, len, cause_len, padding_len;
11065 struct sockaddr_in *src_sin, *dst_sin;
11069 struct sockaddr_in6 *src_sin6, *dst_sin6;
11070 struct ip6_hdr *ip6;
11073 /* Compute the length of the cause and add final padding. */
11075 if (cause != NULL) {
11076 struct mbuf *m_at, *m_last = NULL;
11078 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11079 if (SCTP_BUF_NEXT(m_at) == NULL)
11081 cause_len += SCTP_BUF_LEN(m_at);
11083 padding_len = cause_len % 4;
11084 if (padding_len != 0) {
11085 padding_len = 4 - padding_len;
11087 if (padding_len != 0) {
11088 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11089 sctp_m_freem(cause);
11096 /* Get an mbuf for the header. */
11097 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11098 switch (dst->sa_family) {
11101 len += sizeof(struct ip);
11106 len += sizeof(struct ip6_hdr);
11112 #if defined(INET) || defined(INET6)
11114 len += sizeof(struct udphdr);
11117 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11118 if (mout == NULL) {
11120 sctp_m_freem(cause);
11124 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11125 SCTP_BUF_LEN(mout) = len;
11126 SCTP_BUF_NEXT(mout) = cause;
11127 M_SETFIB(mout, fibnum);
11128 mout->m_pkthdr.flowid = mflowid;
11129 M_HASHTYPE_SET(mout, mflowtype);
11136 switch (dst->sa_family) {
11139 src_sin = (struct sockaddr_in *)src;
11140 dst_sin = (struct sockaddr_in *)dst;
11141 ip = mtod(mout, struct ip *);
11142 ip->ip_v = IPVERSION;
11143 ip->ip_hl = (sizeof(struct ip) >> 2);
11145 ip->ip_off = htons(IP_DF);
11147 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11149 ip->ip_p = IPPROTO_UDP;
11151 ip->ip_p = IPPROTO_SCTP;
11153 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11154 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11156 len = sizeof(struct ip);
11157 shout = (struct sctphdr *)((caddr_t)ip + len);
11162 src_sin6 = (struct sockaddr_in6 *)src;
11163 dst_sin6 = (struct sockaddr_in6 *)dst;
11164 ip6 = mtod(mout, struct ip6_hdr *);
11165 ip6->ip6_flow = htonl(0x60000000);
11166 if (V_ip6_auto_flowlabel) {
11167 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11169 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11171 ip6->ip6_nxt = IPPROTO_UDP;
11173 ip6->ip6_nxt = IPPROTO_SCTP;
11175 ip6->ip6_src = dst_sin6->sin6_addr;
11176 ip6->ip6_dst = src_sin6->sin6_addr;
11177 len = sizeof(struct ip6_hdr);
11178 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11183 shout = mtod(mout, struct sctphdr *);
11186 #if defined(INET) || defined(INET6)
11188 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11189 sctp_m_freem(mout);
11192 udp = (struct udphdr *)shout;
11193 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11194 udp->uh_dport = port;
11196 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11197 sizeof(struct sctphdr) +
11198 sizeof(struct sctp_chunkhdr) +
11199 cause_len + padding_len));
11200 len += sizeof(struct udphdr);
11201 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11206 shout->src_port = sh->dest_port;
11207 shout->dest_port = sh->src_port;
11208 shout->checksum = 0;
11210 shout->v_tag = htonl(vtag);
11212 shout->v_tag = sh->v_tag;
11214 len += sizeof(struct sctphdr);
11215 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11216 ch->chunk_type = type;
11218 ch->chunk_flags = 0;
11220 ch->chunk_flags = SCTP_HAD_NO_TCB;
11222 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11223 len += sizeof(struct sctp_chunkhdr);
11224 len += cause_len + padding_len;
11226 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11227 sctp_m_freem(mout);
11230 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11231 switch (dst->sa_family) {
11236 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11241 ip->ip_len = htons(len);
11243 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11244 SCTP_STAT_INCR(sctps_sendswcrc);
11246 SCTP_ENABLE_UDP_CSUM(o_pak);
11249 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11250 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11251 SCTP_STAT_INCR(sctps_sendhwcrc);
11253 #ifdef SCTP_PACKET_LOGGING
11254 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11255 sctp_packet_log(o_pak);
11258 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11259 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11264 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11266 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11267 SCTP_STAT_INCR(sctps_sendswcrc);
11268 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11269 udp->uh_sum = 0xffff;
11272 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11273 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11274 SCTP_STAT_INCR(sctps_sendhwcrc);
11276 #ifdef SCTP_PACKET_LOGGING
11277 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11278 sctp_packet_log(o_pak);
11281 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11282 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11286 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11288 sctp_m_freem(mout);
11289 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11292 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11293 SCTP_STAT_INCR(sctps_sendpackets);
11294 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11295 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11297 SCTP_STAT_INCR(sctps_senderrors);
11303 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11304 struct sctphdr *sh,
11305 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11306 uint32_t vrf_id, uint16_t port)
11308 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11309 mflowtype, mflowid, fibnum,
11314 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11315 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11320 struct sctp_tmit_chunk *chk;
11321 struct sctp_heartbeat_chunk *hb;
11322 struct timeval now;
11324 SCTP_TCB_LOCK_ASSERT(stcb);
11328 (void)SCTP_GETTIME_TIMEVAL(&now);
11329 switch (net->ro._l_addr.sa.sa_family) {
11341 sctp_alloc_a_chunk(stcb, chk);
11343 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11347 chk->copy_by_ref = 0;
11348 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11349 chk->rec.chunk_id.can_take_data = 1;
11351 chk->asoc = &stcb->asoc;
11352 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11354 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11355 if (chk->data == NULL) {
11356 sctp_free_a_chunk(stcb, chk, so_locked);
11359 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11360 SCTP_BUF_LEN(chk->data) = chk->send_size;
11361 chk->sent = SCTP_DATAGRAM_UNSENT;
11362 chk->snd_count = 0;
11364 atomic_add_int(&chk->whoTo->ref_count, 1);
11365 /* Now we have a mbuf that we can fill in with the details */
11366 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11367 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11368 /* fill out chunk header */
11369 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11370 hb->ch.chunk_flags = 0;
11371 hb->ch.chunk_length = htons(chk->send_size);
11372 /* Fill out hb parameter */
11373 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11374 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11375 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11376 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11377 /* Did our user request this one, put it in */
11378 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11379 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11380 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11382 * we only take from the entropy pool if the address is not
11385 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11386 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11388 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11389 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11391 switch (net->ro._l_addr.sa.sa_family) {
11394 memcpy(hb->heartbeat.hb_info.address,
11395 &net->ro._l_addr.sin.sin_addr,
11396 sizeof(net->ro._l_addr.sin.sin_addr));
11401 memcpy(hb->heartbeat.hb_info.address,
11402 &net->ro._l_addr.sin6.sin6_addr,
11403 sizeof(net->ro._l_addr.sin6.sin6_addr));
11408 sctp_m_freem(chk->data);
11411 sctp_free_a_chunk(stcb, chk, so_locked);
11415 net->hb_responded = 0;
11416 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11417 stcb->asoc.ctrl_queue_cnt++;
11418 SCTP_STAT_INCR(sctps_sendheartbeat);
11423 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11426 struct sctp_association *asoc;
11427 struct sctp_ecne_chunk *ecne;
11428 struct sctp_tmit_chunk *chk;
11433 asoc = &stcb->asoc;
11434 SCTP_TCB_LOCK_ASSERT(stcb);
11435 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11436 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11437 /* found a previous ECN_ECHO update it if needed */
11438 uint32_t cnt, ctsn;
11440 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11441 ctsn = ntohl(ecne->tsn);
11442 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11443 ecne->tsn = htonl(high_tsn);
11444 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11446 cnt = ntohl(ecne->num_pkts_since_cwr);
11448 ecne->num_pkts_since_cwr = htonl(cnt);
11452 /* nope could not find one to update so we must build one */
11453 sctp_alloc_a_chunk(stcb, chk);
11457 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11458 chk->copy_by_ref = 0;
11459 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11460 chk->rec.chunk_id.can_take_data = 0;
11462 chk->asoc = &stcb->asoc;
11463 chk->send_size = sizeof(struct sctp_ecne_chunk);
11464 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11465 if (chk->data == NULL) {
11466 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11469 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11470 SCTP_BUF_LEN(chk->data) = chk->send_size;
11471 chk->sent = SCTP_DATAGRAM_UNSENT;
11472 chk->snd_count = 0;
11474 atomic_add_int(&chk->whoTo->ref_count, 1);
11476 stcb->asoc.ecn_echo_cnt_onq++;
11477 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11478 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11479 ecne->ch.chunk_flags = 0;
11480 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11481 ecne->tsn = htonl(high_tsn);
11482 ecne->num_pkts_since_cwr = htonl(1);
11483 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11484 asoc->ctrl_queue_cnt++;
11488 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11489 struct mbuf *m, int len, int iphlen, int bad_crc)
11491 struct sctp_association *asoc;
11492 struct sctp_pktdrop_chunk *drp;
11493 struct sctp_tmit_chunk *chk;
11499 struct sctp_chunkhdr *ch, chunk_buf;
11500 unsigned int chk_length;
11505 asoc = &stcb->asoc;
11506 SCTP_TCB_LOCK_ASSERT(stcb);
11507 if (asoc->pktdrop_supported == 0) {
11509 * peer must declare support before I send one.
11513 if (stcb->sctp_socket == NULL) {
11516 sctp_alloc_a_chunk(stcb, chk);
11520 chk->copy_by_ref = 0;
11521 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11522 chk->rec.chunk_id.can_take_data = 1;
11525 chk->send_size = len;
11526 /* Validate that we do not have an ABORT in here. */
11527 offset = iphlen + sizeof(struct sctphdr);
11528 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11529 sizeof(*ch), (uint8_t *)&chunk_buf);
11530 while (ch != NULL) {
11531 chk_length = ntohs(ch->chunk_length);
11532 if (chk_length < sizeof(*ch)) {
11533 /* break to abort land */
11536 switch (ch->chunk_type) {
11537 case SCTP_PACKET_DROPPED:
11538 case SCTP_ABORT_ASSOCIATION:
11539 case SCTP_INITIATION_ACK:
11541 * We don't respond with an PKT-DROP to an ABORT
11542 * or PKT-DROP. We also do not respond to an
11543 * INIT-ACK, because we can't know if the initiation
11544 * tag is correct or not.
11546 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11551 offset += SCTP_SIZE32(chk_length);
11552 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11553 sizeof(*ch), (uint8_t *)&chunk_buf);
11556 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11557 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11559 * only send 1 mtu worth, trim off the excess on the end.
11562 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11565 chk->asoc = &stcb->asoc;
11566 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11567 if (chk->data == NULL) {
11569 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11572 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11573 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11575 sctp_m_freem(chk->data);
11579 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11580 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11581 chk->book_size_scale = 0;
11583 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11584 drp->trunc_len = htons(fullsz);
11586 * Len is already adjusted to size minus overhead above take
11587 * out the pkt_drop chunk itself from it.
11589 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11590 len = chk->send_size;
11592 /* no truncation needed */
11593 drp->ch.chunk_flags = 0;
11594 drp->trunc_len = htons(0);
11597 drp->ch.chunk_flags |= SCTP_BADCRC;
11599 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11600 SCTP_BUF_LEN(chk->data) = chk->send_size;
11601 chk->sent = SCTP_DATAGRAM_UNSENT;
11602 chk->snd_count = 0;
11604 /* we should hit here */
11606 atomic_add_int(&chk->whoTo->ref_count, 1);
11610 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11611 drp->ch.chunk_length = htons(chk->send_size);
11612 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11616 drp->bottle_bw = htonl(spc);
11617 if (asoc->my_rwnd) {
11618 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11619 asoc->size_on_all_streams +
11620 asoc->my_rwnd_control_len +
11621 stcb->sctp_socket->so_rcv.sb_cc);
11624 * If my rwnd is 0, possibly from mbuf depletion as well as
11625 * space used, tell the peer there is NO space aka onq == bw
11627 drp->current_onq = htonl(spc);
11631 m_copydata(m, iphlen, len, (caddr_t)datap);
11632 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11633 asoc->ctrl_queue_cnt++;
11637 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11639 struct sctp_association *asoc;
11640 struct sctp_cwr_chunk *cwr;
11641 struct sctp_tmit_chunk *chk;
11643 SCTP_TCB_LOCK_ASSERT(stcb);
11647 asoc = &stcb->asoc;
11648 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11649 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11651 * found a previous CWR queued to same destination
11652 * update it if needed
11656 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11657 ctsn = ntohl(cwr->tsn);
11658 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11659 cwr->tsn = htonl(high_tsn);
11661 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11662 /* Make sure override is carried */
11663 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11668 sctp_alloc_a_chunk(stcb, chk);
11672 chk->copy_by_ref = 0;
11673 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11674 chk->rec.chunk_id.can_take_data = 1;
11676 chk->asoc = &stcb->asoc;
11677 chk->send_size = sizeof(struct sctp_cwr_chunk);
11678 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11679 if (chk->data == NULL) {
11680 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11683 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11684 SCTP_BUF_LEN(chk->data) = chk->send_size;
11685 chk->sent = SCTP_DATAGRAM_UNSENT;
11686 chk->snd_count = 0;
11688 atomic_add_int(&chk->whoTo->ref_count, 1);
11689 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11690 cwr->ch.chunk_type = SCTP_ECN_CWR;
11691 cwr->ch.chunk_flags = override;
11692 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11693 cwr->tsn = htonl(high_tsn);
11694 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11695 asoc->ctrl_queue_cnt++;
11699 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11700 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11702 uint16_t len, old_len, i;
11703 struct sctp_stream_reset_out_request *req_out;
11704 struct sctp_chunkhdr *ch;
11706 int number_entries = 0;
11708 ch = mtod(chk->data, struct sctp_chunkhdr *);
11709 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11710 /* get to new offset for the param. */
11711 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11712 /* now how long will this param be? */
11713 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11714 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11715 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11716 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11720 if (number_entries == 0) {
11723 if (number_entries == stcb->asoc.streamoutcnt) {
11724 number_entries = 0;
11726 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11727 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11729 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11730 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11731 req_out->ph.param_length = htons(len);
11732 req_out->request_seq = htonl(seq);
11733 req_out->response_seq = htonl(resp_seq);
11734 req_out->send_reset_at_tsn = htonl(last_sent);
11736 if (number_entries) {
11737 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11738 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11739 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11740 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11741 req_out->list_of_streams[at] = htons(i);
11743 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11744 if (at >= number_entries) {
11750 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11751 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11754 if (SCTP_SIZE32(len) > len) {
11756 * Need to worry about the pad we may end up adding to the
11757 * end. This is easy since the struct is either aligned to 4
11758 * bytes or 2 bytes off.
11760 req_out->list_of_streams[number_entries] = 0;
11762 /* now fix the chunk length */
11763 ch->chunk_length = htons(len + old_len);
11764 chk->book_size = len + old_len;
11765 chk->book_size_scale = 0;
11766 chk->send_size = SCTP_SIZE32(chk->book_size);
11767 SCTP_BUF_LEN(chk->data) = chk->send_size;
11772 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11773 int number_entries, uint16_t *list,
11776 uint16_t len, old_len, i;
11777 struct sctp_stream_reset_in_request *req_in;
11778 struct sctp_chunkhdr *ch;
11780 ch = mtod(chk->data, struct sctp_chunkhdr *);
11781 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11783 /* get to new offset for the param. */
11784 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11785 /* now how long will this param be? */
11786 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11787 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11788 req_in->ph.param_length = htons(len);
11789 req_in->request_seq = htonl(seq);
11790 if (number_entries) {
11791 for (i = 0; i < number_entries; i++) {
11792 req_in->list_of_streams[i] = htons(list[i]);
11795 if (SCTP_SIZE32(len) > len) {
11797 * Need to worry about the pad we may end up adding to the
11798 * end. This is easy since the struct is either aligned to 4
11799 * bytes or 2 bytes off.
11801 req_in->list_of_streams[number_entries] = 0;
11803 /* now fix the chunk length */
11804 ch->chunk_length = htons(len + old_len);
11805 chk->book_size = len + old_len;
11806 chk->book_size_scale = 0;
11807 chk->send_size = SCTP_SIZE32(chk->book_size);
11808 SCTP_BUF_LEN(chk->data) = chk->send_size;
11813 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11816 uint16_t len, old_len;
11817 struct sctp_stream_reset_tsn_request *req_tsn;
11818 struct sctp_chunkhdr *ch;
11820 ch = mtod(chk->data, struct sctp_chunkhdr *);
11821 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11823 /* get to new offset for the param. */
11824 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11825 /* now how long will this param be? */
11826 len = sizeof(struct sctp_stream_reset_tsn_request);
11827 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11828 req_tsn->ph.param_length = htons(len);
11829 req_tsn->request_seq = htonl(seq);
11831 /* now fix the chunk length */
11832 ch->chunk_length = htons(len + old_len);
11833 chk->send_size = len + old_len;
11834 chk->book_size = SCTP_SIZE32(chk->send_size);
11835 chk->book_size_scale = 0;
11836 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11841 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11842 uint32_t resp_seq, uint32_t result)
11844 uint16_t len, old_len;
11845 struct sctp_stream_reset_response *resp;
11846 struct sctp_chunkhdr *ch;
11848 ch = mtod(chk->data, struct sctp_chunkhdr *);
11849 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11851 /* get to new offset for the param. */
11852 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11853 /* now how long will this param be? */
11854 len = sizeof(struct sctp_stream_reset_response);
11855 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11856 resp->ph.param_length = htons(len);
11857 resp->response_seq = htonl(resp_seq);
11858 resp->result = ntohl(result);
11860 /* now fix the chunk length */
11861 ch->chunk_length = htons(len + old_len);
11862 chk->book_size = len + old_len;
11863 chk->book_size_scale = 0;
11864 chk->send_size = SCTP_SIZE32(chk->book_size);
11865 SCTP_BUF_LEN(chk->data) = chk->send_size;
11870 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11871 struct sctp_stream_reset_list *ent,
11874 struct sctp_association *asoc;
11875 struct sctp_tmit_chunk *chk;
11876 struct sctp_chunkhdr *ch;
11878 asoc = &stcb->asoc;
11881 * Reset our last reset action to the new one IP -> response
11882 * (PERFORMED probably). This assures that if we fail to send, a
11883 * retran from the peer will get the new response.
11885 asoc->last_reset_action[0] = response;
11886 if (asoc->stream_reset_outstanding) {
11889 sctp_alloc_a_chunk(stcb, chk);
11891 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11894 chk->copy_by_ref = 0;
11895 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11896 chk->rec.chunk_id.can_take_data = 0;
11898 chk->asoc = &stcb->asoc;
11899 chk->book_size = sizeof(struct sctp_chunkhdr);
11900 chk->send_size = SCTP_SIZE32(chk->book_size);
11901 chk->book_size_scale = 0;
11902 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11903 if (chk->data == NULL) {
11904 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11905 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11908 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11909 /* setup chunk parameters */
11910 chk->sent = SCTP_DATAGRAM_UNSENT;
11911 chk->snd_count = 0;
11912 if (stcb->asoc.alternate) {
11913 chk->whoTo = stcb->asoc.alternate;
11915 chk->whoTo = stcb->asoc.primary_destination;
11917 ch = mtod(chk->data, struct sctp_chunkhdr *);
11918 ch->chunk_type = SCTP_STREAM_RESET;
11919 ch->chunk_flags = 0;
11920 ch->chunk_length = htons(chk->book_size);
11921 atomic_add_int(&chk->whoTo->ref_count, 1);
11922 SCTP_BUF_LEN(chk->data) = chk->send_size;
11923 sctp_add_stream_reset_result(chk, ent->seq, response);
11924 /* insert the chunk for sending */
11925 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11928 asoc->ctrl_queue_cnt++;
11932 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11933 uint32_t resp_seq, uint32_t result,
11934 uint32_t send_una, uint32_t recv_next)
11936 uint16_t len, old_len;
11937 struct sctp_stream_reset_response_tsn *resp;
11938 struct sctp_chunkhdr *ch;
11940 ch = mtod(chk->data, struct sctp_chunkhdr *);
11941 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11943 /* get to new offset for the param. */
11944 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11945 /* now how long will this param be? */
11946 len = sizeof(struct sctp_stream_reset_response_tsn);
11947 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11948 resp->ph.param_length = htons(len);
11949 resp->response_seq = htonl(resp_seq);
11950 resp->result = htonl(result);
11951 resp->senders_next_tsn = htonl(send_una);
11952 resp->receivers_next_tsn = htonl(recv_next);
11954 /* now fix the chunk length */
11955 ch->chunk_length = htons(len + old_len);
11956 chk->book_size = len + old_len;
11957 chk->send_size = SCTP_SIZE32(chk->book_size);
11958 chk->book_size_scale = 0;
11959 SCTP_BUF_LEN(chk->data) = chk->send_size;
11964 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11968 uint16_t len, old_len;
11969 struct sctp_chunkhdr *ch;
11970 struct sctp_stream_reset_add_strm *addstr;
11972 ch = mtod(chk->data, struct sctp_chunkhdr *);
11973 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11975 /* get to new offset for the param. */
11976 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11977 /* now how long will this param be? */
11978 len = sizeof(struct sctp_stream_reset_add_strm);
11981 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11982 addstr->ph.param_length = htons(len);
11983 addstr->request_seq = htonl(seq);
11984 addstr->number_of_streams = htons(adding);
11985 addstr->reserved = 0;
11987 /* now fix the chunk length */
11988 ch->chunk_length = htons(len + old_len);
11989 chk->send_size = len + old_len;
11990 chk->book_size = SCTP_SIZE32(chk->send_size);
11991 chk->book_size_scale = 0;
11992 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11997 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
12001 uint16_t len, old_len;
12002 struct sctp_chunkhdr *ch;
12003 struct sctp_stream_reset_add_strm *addstr;
12005 ch = mtod(chk->data, struct sctp_chunkhdr *);
12006 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12008 /* get to new offset for the param. */
12009 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12010 /* now how long will this param be? */
12011 len = sizeof(struct sctp_stream_reset_add_strm);
12013 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12014 addstr->ph.param_length = htons(len);
12015 addstr->request_seq = htonl(seq);
12016 addstr->number_of_streams = htons(adding);
12017 addstr->reserved = 0;
12019 /* now fix the chunk length */
12020 ch->chunk_length = htons(len + old_len);
12021 chk->send_size = len + old_len;
12022 chk->book_size = SCTP_SIZE32(chk->send_size);
12023 chk->book_size_scale = 0;
12024 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12029 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12031 struct sctp_association *asoc;
12032 struct sctp_tmit_chunk *chk;
12033 struct sctp_chunkhdr *ch;
12036 asoc = &stcb->asoc;
12037 asoc->trigger_reset = 0;
12038 if (asoc->stream_reset_outstanding) {
12041 sctp_alloc_a_chunk(stcb, chk);
12043 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12046 chk->copy_by_ref = 0;
12047 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12048 chk->rec.chunk_id.can_take_data = 0;
12050 chk->asoc = &stcb->asoc;
12051 chk->book_size = sizeof(struct sctp_chunkhdr);
12052 chk->send_size = SCTP_SIZE32(chk->book_size);
12053 chk->book_size_scale = 0;
12054 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12055 if (chk->data == NULL) {
12056 sctp_free_a_chunk(stcb, chk, so_locked);
12057 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12060 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12062 /* setup chunk parameters */
12063 chk->sent = SCTP_DATAGRAM_UNSENT;
12064 chk->snd_count = 0;
12065 if (stcb->asoc.alternate) {
12066 chk->whoTo = stcb->asoc.alternate;
12068 chk->whoTo = stcb->asoc.primary_destination;
12070 ch = mtod(chk->data, struct sctp_chunkhdr *);
12071 ch->chunk_type = SCTP_STREAM_RESET;
12072 ch->chunk_flags = 0;
12073 ch->chunk_length = htons(chk->book_size);
12074 atomic_add_int(&chk->whoTo->ref_count, 1);
12075 SCTP_BUF_LEN(chk->data) = chk->send_size;
12076 seq = stcb->asoc.str_reset_seq_out;
12077 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12079 asoc->stream_reset_outstanding++;
12081 m_freem(chk->data);
12083 sctp_free_a_chunk(stcb, chk, so_locked);
12086 asoc->str_reset = chk;
12087 /* insert the chunk for sending */
12088 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12091 asoc->ctrl_queue_cnt++;
12093 if (stcb->asoc.send_sack) {
12094 sctp_send_sack(stcb, so_locked);
12096 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12101 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12102 uint16_t number_entries, uint16_t *list,
12103 uint8_t send_in_req,
12104 uint8_t send_tsn_req,
12105 uint8_t add_stream,
12107 uint16_t adding_i, uint8_t peer_asked)
12109 struct sctp_association *asoc;
12110 struct sctp_tmit_chunk *chk;
12111 struct sctp_chunkhdr *ch;
12112 int can_send_out_req = 0;
12115 asoc = &stcb->asoc;
12116 if (asoc->stream_reset_outstanding) {
12118 * Already one pending, must get ACK back to clear the flag.
12120 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12123 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12124 (add_stream == 0)) {
12125 /* nothing to do */
12126 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12129 if (send_tsn_req && send_in_req) {
12130 /* error, can't do that */
12131 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12133 } else if (send_in_req) {
12134 can_send_out_req = 1;
12136 if (number_entries > (MCLBYTES -
12137 SCTP_MIN_OVERHEAD -
12138 sizeof(struct sctp_chunkhdr) -
12139 sizeof(struct sctp_stream_reset_out_request)) /
12140 sizeof(uint16_t)) {
12141 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12144 sctp_alloc_a_chunk(stcb, chk);
12146 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12149 chk->copy_by_ref = 0;
12150 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12151 chk->rec.chunk_id.can_take_data = 0;
12153 chk->asoc = &stcb->asoc;
12154 chk->book_size = sizeof(struct sctp_chunkhdr);
12155 chk->send_size = SCTP_SIZE32(chk->book_size);
12156 chk->book_size_scale = 0;
12158 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12159 if (chk->data == NULL) {
12160 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12161 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12164 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12166 /* setup chunk parameters */
12167 chk->sent = SCTP_DATAGRAM_UNSENT;
12168 chk->snd_count = 0;
12169 if (stcb->asoc.alternate) {
12170 chk->whoTo = stcb->asoc.alternate;
12172 chk->whoTo = stcb->asoc.primary_destination;
12174 atomic_add_int(&chk->whoTo->ref_count, 1);
12175 ch = mtod(chk->data, struct sctp_chunkhdr *);
12176 ch->chunk_type = SCTP_STREAM_RESET;
12177 ch->chunk_flags = 0;
12178 ch->chunk_length = htons(chk->book_size);
12179 SCTP_BUF_LEN(chk->data) = chk->send_size;
12181 seq = stcb->asoc.str_reset_seq_out;
12182 if (can_send_out_req) {
12185 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12188 asoc->stream_reset_outstanding++;
12191 if ((add_stream & 1) &&
12192 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12193 /* Need to allocate more */
12194 struct sctp_stream_out *oldstream;
12195 struct sctp_stream_queue_pending *sp, *nsp;
12197 #if defined(SCTP_DETAILED_STR_STATS)
12201 oldstream = stcb->asoc.strmout;
12202 /* get some more */
12203 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12204 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12206 if (stcb->asoc.strmout == NULL) {
12209 stcb->asoc.strmout = oldstream;
12210 /* Turn off the bit */
12211 x = add_stream & 0xfe;
12216 * Ok now we proceed with copying the old out stuff and
12217 * initializing the new stuff.
12219 SCTP_TCB_SEND_LOCK(stcb);
12220 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12221 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12222 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12223 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12224 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12225 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12226 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12227 stcb->asoc.strmout[i].sid = i;
12228 stcb->asoc.strmout[i].state = oldstream[i].state;
12229 /* FIX ME FIX ME */
12231 * This should be a SS_COPY operation FIX ME STREAM
12234 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12235 /* now anything on those queues? */
12236 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12237 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12238 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12242 /* now the new streams */
12243 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12244 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12245 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12246 stcb->asoc.strmout[i].chunks_on_queues = 0;
12247 #if defined(SCTP_DETAILED_STR_STATS)
12248 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12249 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12250 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12253 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12254 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12256 stcb->asoc.strmout[i].next_mid_ordered = 0;
12257 stcb->asoc.strmout[i].next_mid_unordered = 0;
12258 stcb->asoc.strmout[i].sid = i;
12259 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12260 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12261 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12263 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12264 SCTP_FREE(oldstream, SCTP_M_STRMO);
12265 SCTP_TCB_SEND_UNLOCK(stcb);
12268 if ((add_stream & 1) && (adding_o > 0)) {
12269 asoc->strm_pending_add_size = adding_o;
12270 asoc->peer_req_out = peer_asked;
12271 sctp_add_an_out_stream(chk, seq, adding_o);
12273 asoc->stream_reset_outstanding++;
12275 if ((add_stream & 2) && (adding_i > 0)) {
12276 sctp_add_an_in_stream(chk, seq, adding_i);
12278 asoc->stream_reset_outstanding++;
12281 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12283 asoc->stream_reset_outstanding++;
12285 if (send_tsn_req) {
12286 sctp_add_stream_reset_tsn(chk, seq);
12287 asoc->stream_reset_outstanding++;
12289 asoc->str_reset = chk;
12290 /* insert the chunk for sending */
12291 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12294 asoc->ctrl_queue_cnt++;
12295 if (stcb->asoc.send_sack) {
12296 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12298 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12303 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12304 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12305 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12306 uint32_t vrf_id, uint16_t port)
12308 /* Don't respond to an ABORT with an ABORT. */
12309 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12311 sctp_m_freem(cause);
12314 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12315 mflowtype, mflowid, fibnum,
12321 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12322 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12323 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12324 uint32_t vrf_id, uint16_t port)
12326 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12327 mflowtype, mflowid, fibnum,
12332 static struct mbuf *
12333 sctp_copy_resume(struct uio *uio,
12335 int user_marks_eor,
12338 struct mbuf **new_tail)
12342 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12343 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12345 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12348 *sndout = m_length(m, NULL);
12349 *new_tail = m_last(m);
12355 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12359 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12361 if (sp->data == NULL) {
12362 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12366 sp->tail_mbuf = m_last(sp->data);
12372 static struct sctp_stream_queue_pending *
12373 sctp_copy_it_in(struct sctp_tcb *stcb,
12374 struct sctp_association *asoc,
12375 struct sctp_sndrcvinfo *srcv,
12377 struct sctp_nets *net,
12379 int user_marks_eor,
12384 * This routine must be very careful in its work. Protocol
12385 * processing is up and running so care must be taken to spl...()
12386 * when you need to do something that may effect the stcb/asoc. The
12387 * sb is locked however. When data is copied the protocol processing
12388 * should be enabled since this is a slower operation...
12390 struct sctp_stream_queue_pending *sp = NULL;
12394 /* Now can we send this? */
12395 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12396 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12397 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12398 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12399 /* got data while shutting down */
12400 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12401 *error = ECONNRESET;
12404 sctp_alloc_a_strmoq(stcb, sp);
12406 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12411 sp->sender_all_done = 0;
12412 sp->sinfo_flags = srcv->sinfo_flags;
12413 sp->timetolive = srcv->sinfo_timetolive;
12414 sp->ppid = srcv->sinfo_ppid;
12415 sp->context = srcv->sinfo_context;
12417 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12419 sp->sid = srcv->sinfo_stream;
12420 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12421 if ((sp->length == (uint32_t)uio->uio_resid) &&
12422 ((user_marks_eor == 0) ||
12423 (srcv->sinfo_flags & SCTP_EOF) ||
12424 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12425 sp->msg_is_complete = 1;
12427 sp->msg_is_complete = 0;
12429 sp->sender_all_done = 0;
12430 sp->some_taken = 0;
12431 sp->put_last_out = 0;
12432 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12433 sp->data = sp->tail_mbuf = NULL;
12434 if (sp->length == 0) {
12437 if (srcv->sinfo_keynumber_valid) {
12438 sp->auth_keyid = srcv->sinfo_keynumber;
12440 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12442 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12443 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12444 sp->holds_key_ref = 1;
12446 *error = sctp_copy_one(sp, uio, resv_in_first);
12449 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12452 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12454 atomic_add_int(&sp->net->ref_count, 1);
12458 sctp_set_prsctp_policy(sp);
12466 sctp_sosend(struct socket *so,
12467 struct sockaddr *addr,
12470 struct mbuf *control,
12475 int error, use_sndinfo = 0;
12476 struct sctp_sndrcvinfo sndrcvninfo;
12477 struct sockaddr *addr_to_use;
12478 #if defined(INET) && defined(INET6)
12479 struct sockaddr_in sin;
12483 /* process cmsg snd/rcv info (maybe a assoc-id) */
12484 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12485 sizeof(sndrcvninfo))) {
12490 addr_to_use = addr;
12491 #if defined(INET) && defined(INET6)
12492 if ((addr) && (addr->sa_family == AF_INET6)) {
12493 struct sockaddr_in6 *sin6;
12495 sin6 = (struct sockaddr_in6 *)addr;
12496 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12497 in6_sin6_2_sin(&sin, sin6);
12498 addr_to_use = (struct sockaddr *)&sin;
12502 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12505 use_sndinfo ? &sndrcvninfo : NULL
12513 sctp_lower_sosend(struct socket *so,
12514 struct sockaddr *addr,
12516 struct mbuf *i_pak,
12517 struct mbuf *control,
12519 struct sctp_sndrcvinfo *srcv
12524 unsigned int sndlen = 0, max_len;
12526 struct mbuf *top = NULL;
12527 int queue_only = 0, queue_only_for_init = 0;
12528 int free_cnt_applied = 0;
12530 int now_filled = 0;
12531 unsigned int inqueue_bytes = 0;
12532 struct sctp_block_entry be;
12533 struct sctp_inpcb *inp;
12534 struct sctp_tcb *stcb = NULL;
12535 struct timeval now;
12536 struct sctp_nets *net;
12537 struct sctp_association *asoc;
12538 struct sctp_inpcb *t_inp;
12539 int user_marks_eor;
12540 int create_lock_applied = 0;
12541 int nagle_applies = 0;
12542 int some_on_control = 0;
12543 int got_all_of_the_send = 0;
12544 int hold_tcblock = 0;
12545 int non_blocking = 0;
12546 uint32_t local_add_more, local_soresv = 0;
12548 uint16_t sinfo_flags;
12549 sctp_assoc_t sinfo_assoc_id;
12556 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12558 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12561 SCTP_RELEASE_PKT(i_pak);
12565 if ((uio == NULL) && (i_pak == NULL)) {
12566 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12569 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12570 atomic_add_int(&inp->total_sends, 1);
12572 if (uio->uio_resid < 0) {
12573 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12576 sndlen = (unsigned int)uio->uio_resid;
12578 top = SCTP_HEADER_TO_CHAIN(i_pak);
12579 sndlen = SCTP_HEADER_LEN(i_pak);
12581 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12584 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12585 SCTP_IS_LISTENING(inp)) {
12586 /* The listener can NOT send */
12587 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12592 * Pre-screen address, if one is given the sin-len
12593 * must be set correctly!
12596 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12598 switch (raddr->sa.sa_family) {
12601 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12602 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12606 port = raddr->sin.sin_port;
12611 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12612 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12616 port = raddr->sin6.sin6_port;
12620 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12621 error = EAFNOSUPPORT;
12628 sinfo_flags = srcv->sinfo_flags;
12629 sinfo_assoc_id = srcv->sinfo_assoc_id;
12630 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12631 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12632 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12636 if (srcv->sinfo_flags)
12637 SCTP_STAT_INCR(sctps_sends_with_flags);
12639 sinfo_flags = inp->def_send.sinfo_flags;
12640 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12642 if (sinfo_flags & SCTP_SENDALL) {
12643 /* its a sendall */
12644 error = sctp_sendall(inp, uio, top, srcv);
12648 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12649 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12653 /* now we must find the assoc */
12654 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12655 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12656 SCTP_INP_RLOCK(inp);
12657 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12659 SCTP_TCB_LOCK(stcb);
12662 SCTP_INP_RUNLOCK(inp);
12663 } else if (sinfo_assoc_id) {
12664 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12665 if (stcb != NULL) {
12670 * Since we did not use findep we must
12671 * increment it, and if we don't find a tcb
12674 SCTP_INP_WLOCK(inp);
12675 SCTP_INP_INCR_REF(inp);
12676 SCTP_INP_WUNLOCK(inp);
12677 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12678 if (stcb == NULL) {
12679 SCTP_INP_WLOCK(inp);
12680 SCTP_INP_DECR_REF(inp);
12681 SCTP_INP_WUNLOCK(inp);
12686 if ((stcb == NULL) && (addr)) {
12687 /* Possible implicit send? */
12688 SCTP_ASOC_CREATE_LOCK(inp);
12689 create_lock_applied = 1;
12690 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12691 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12692 /* Should I really unlock ? */
12693 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12698 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12699 (addr->sa_family == AF_INET6)) {
12700 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12704 SCTP_INP_WLOCK(inp);
12705 SCTP_INP_INCR_REF(inp);
12706 SCTP_INP_WUNLOCK(inp);
12707 /* With the lock applied look again */
12708 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12709 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12710 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12712 if (stcb == NULL) {
12713 SCTP_INP_WLOCK(inp);
12714 SCTP_INP_DECR_REF(inp);
12715 SCTP_INP_WUNLOCK(inp);
12722 if (t_inp != inp) {
12723 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12728 if (stcb == NULL) {
12729 if (addr == NULL) {
12730 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12734 /* We must go ahead and start the INIT process */
12737 if ((sinfo_flags & SCTP_ABORT) ||
12738 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12740 * User asks to abort a non-existant assoc,
12741 * or EOF a non-existant assoc with no data
12743 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12747 /* get an asoc/stcb struct */
12748 vrf_id = inp->def_vrf_id;
12750 if (create_lock_applied == 0) {
12751 panic("Error, should hold create lock and I don't?");
12754 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12755 inp->sctp_ep.pre_open_stream_count,
12758 if (stcb == NULL) {
12759 /* Error is setup for us in the call */
12762 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12763 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12765 * Set the connected flag so we can queue
12768 soisconnecting(so);
12771 if (create_lock_applied) {
12772 SCTP_ASOC_CREATE_UNLOCK(inp);
12773 create_lock_applied = 0;
12775 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12778 * Turn on queue only flag to prevent data from
12782 asoc = &stcb->asoc;
12783 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12784 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12786 /* initialize authentication params for the assoc */
12787 sctp_initialize_auth_params(inp, stcb);
12790 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12791 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12792 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12798 /* out with the INIT */
12799 queue_only_for_init = 1;
12801 * we may want to dig in after this call and adjust the MTU
12802 * value. It defaulted to 1500 (constant) but the ro
12803 * structure may now have an update and thus we may need to
12804 * change it BEFORE we append the message.
12808 asoc = &stcb->asoc;
12810 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12811 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12813 net = sctp_findnet(stcb, addr);
12816 if ((net == NULL) ||
12817 ((port != 0) && (port != stcb->rport))) {
12818 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12823 if (stcb->asoc.alternate) {
12824 net = stcb->asoc.alternate;
12826 net = stcb->asoc.primary_destination;
12829 atomic_add_int(&stcb->total_sends, 1);
12830 /* Keep the stcb from being freed under our feet */
12831 atomic_add_int(&asoc->refcnt, 1);
12832 free_cnt_applied = 1;
12834 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12835 if (sndlen > asoc->smallest_mtu) {
12836 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12841 if (SCTP_SO_IS_NBIO(so)
12842 || (flags & MSG_NBIO)
12846 /* would we block? */
12847 if (non_blocking) {
12850 if (hold_tcblock == 0) {
12851 SCTP_TCB_LOCK(stcb);
12854 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12855 if (user_marks_eor == 0) {
12860 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12861 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12862 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12863 if (sndlen > SCTP_SB_LIMIT_SND(so))
12866 error = EWOULDBLOCK;
12869 stcb->asoc.sb_send_resv += sndlen;
12870 SCTP_TCB_UNLOCK(stcb);
12873 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12875 local_soresv = sndlen;
12876 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12877 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12878 error = ECONNRESET;
12881 if (create_lock_applied) {
12882 SCTP_ASOC_CREATE_UNLOCK(inp);
12883 create_lock_applied = 0;
12885 /* Is the stream no. valid? */
12886 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12887 /* Invalid stream number */
12888 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12892 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12893 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12895 * Can't queue any data while stream reset is underway.
12897 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12902 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12905 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12906 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12909 /* we are now done with all control */
12911 sctp_m_freem(control);
12914 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12915 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12916 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12917 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12918 if (srcv->sinfo_flags & SCTP_ABORT) {
12921 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12922 error = ECONNRESET;
12926 /* Ok, we will attempt a msgsnd :> */
12928 p->td_ru.ru_msgsnd++;
12930 /* Are we aborting? */
12931 if (srcv->sinfo_flags & SCTP_ABORT) {
12933 int tot_demand, tot_out = 0, max_out;
12935 SCTP_STAT_INCR(sctps_sends_with_abort);
12936 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12937 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12938 /* It has to be up before we abort */
12939 /* how big is the user initiated abort? */
12940 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12944 if (hold_tcblock) {
12945 SCTP_TCB_UNLOCK(stcb);
12949 struct mbuf *cntm = NULL;
12951 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12953 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12954 tot_out += SCTP_BUF_LEN(cntm);
12958 /* Must fit in a MTU */
12960 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12961 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12963 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12967 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12970 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12974 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12975 max_out -= sizeof(struct sctp_abort_msg);
12976 if (tot_out > max_out) {
12980 struct sctp_paramhdr *ph;
12982 /* now move forward the data pointer */
12983 ph = mtod(mm, struct sctp_paramhdr *);
12984 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12985 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12987 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12989 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12992 * Here if we can't get his data we
12993 * still abort we just don't get to
12994 * send the users note :-0
13001 SCTP_BUF_NEXT(mm) = top;
13005 if (hold_tcblock == 0) {
13006 SCTP_TCB_LOCK(stcb);
13008 atomic_add_int(&stcb->asoc.refcnt, -1);
13009 free_cnt_applied = 0;
13010 /* release this lock, otherwise we hang on ourselves */
13011 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13012 /* now relock the stcb so everything is sane */
13016 * In this case top is already chained to mm avoid double
13017 * free, since we free it below if top != NULL and driver
13018 * would free it after sending the packet out
13025 /* Calculate the maximum we can send */
13026 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13027 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13028 if (non_blocking) {
13029 /* we already checked for non-blocking above. */
13032 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13037 if (hold_tcblock) {
13038 SCTP_TCB_UNLOCK(stcb);
13041 if (asoc->strmout == NULL) {
13042 /* huh? software error */
13043 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13048 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13049 if ((user_marks_eor == 0) &&
13050 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13051 /* It will NEVER fit */
13052 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13056 if ((uio == NULL) && user_marks_eor) {
13058 * We do not support eeor mode for
13059 * sending with mbuf chains (like sendfile).
13061 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13066 if (user_marks_eor) {
13067 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13070 * For non-eeor the whole message must fit in
13071 * the socket send buffer.
13073 local_add_more = sndlen;
13076 if (non_blocking) {
13077 goto skip_preblock;
13079 if (((max_len <= local_add_more) &&
13080 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13082 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13083 /* No room right now ! */
13084 SOCKBUF_LOCK(&so->so_snd);
13085 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13086 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13087 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13088 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13089 (unsigned int)SCTP_SB_LIMIT_SND(so),
13092 stcb->asoc.stream_queue_cnt,
13093 stcb->asoc.chunks_on_out_queue,
13094 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13095 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13096 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13099 stcb->block_entry = &be;
13100 error = sbwait(&so->so_snd);
13101 stcb->block_entry = NULL;
13102 if (error || so->so_error || be.error) {
13105 error = so->so_error;
13110 SOCKBUF_UNLOCK(&so->so_snd);
13113 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13114 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13115 asoc, stcb->asoc.total_output_queue_size);
13117 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13118 SOCKBUF_UNLOCK(&so->so_snd);
13121 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13123 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13124 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13128 SOCKBUF_UNLOCK(&so->so_snd);
13132 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13136 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13137 * case NOTE: uio will be null when top/mbuf is passed
13140 if (srcv->sinfo_flags & SCTP_EOF) {
13141 got_all_of_the_send = 1;
13144 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13150 struct sctp_stream_queue_pending *sp;
13151 struct sctp_stream_out *strm;
13154 SCTP_TCB_SEND_LOCK(stcb);
13155 if ((asoc->stream_locked) &&
13156 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13157 SCTP_TCB_SEND_UNLOCK(stcb);
13158 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13162 SCTP_TCB_SEND_UNLOCK(stcb);
13164 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13165 if (strm->last_msg_incomplete == 0) {
13167 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13171 SCTP_TCB_SEND_LOCK(stcb);
13172 if (sp->msg_is_complete) {
13173 strm->last_msg_incomplete = 0;
13174 asoc->stream_locked = 0;
13177 * Just got locked to this guy in case of an
13180 strm->last_msg_incomplete = 1;
13181 if (stcb->asoc.idata_supported == 0) {
13182 asoc->stream_locked = 1;
13183 asoc->stream_locked_on = srcv->sinfo_stream;
13185 sp->sender_all_done = 0;
13187 sctp_snd_sb_alloc(stcb, sp->length);
13188 atomic_add_int(&asoc->stream_queue_cnt, 1);
13189 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13190 SCTP_STAT_INCR(sctps_sends_with_unord);
13192 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13193 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13194 SCTP_TCB_SEND_UNLOCK(stcb);
13196 SCTP_TCB_SEND_LOCK(stcb);
13197 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13198 SCTP_TCB_SEND_UNLOCK(stcb);
13200 /* ???? Huh ??? last msg is gone */
13202 panic("Warning: Last msg marked incomplete, yet nothing left?");
13204 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13205 strm->last_msg_incomplete = 0;
13211 while (uio->uio_resid > 0) {
13212 /* How much room do we have? */
13213 struct mbuf *new_tail, *mm;
13215 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13216 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13217 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13221 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13222 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13223 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13226 if (hold_tcblock) {
13227 SCTP_TCB_UNLOCK(stcb);
13230 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13231 if ((mm == NULL) || error) {
13237 /* Update the mbuf and count */
13238 SCTP_TCB_SEND_LOCK(stcb);
13239 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13241 * we need to get out. Peer probably
13245 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13246 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13247 error = ECONNRESET;
13249 SCTP_TCB_SEND_UNLOCK(stcb);
13252 if (sp->tail_mbuf) {
13253 /* tack it to the end */
13254 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13255 sp->tail_mbuf = new_tail;
13257 /* A stolen mbuf */
13259 sp->tail_mbuf = new_tail;
13261 sctp_snd_sb_alloc(stcb, sndout);
13262 atomic_add_int(&sp->length, sndout);
13264 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13265 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13268 /* Did we reach EOR? */
13269 if ((uio->uio_resid == 0) &&
13270 ((user_marks_eor == 0) ||
13271 (srcv->sinfo_flags & SCTP_EOF) ||
13272 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13273 sp->msg_is_complete = 1;
13275 sp->msg_is_complete = 0;
13277 SCTP_TCB_SEND_UNLOCK(stcb);
13279 if (uio->uio_resid == 0) {
13284 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13286 * This is ugly but we must assure locking
13289 if (hold_tcblock == 0) {
13290 SCTP_TCB_LOCK(stcb);
13293 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13294 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13295 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13296 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13302 SCTP_TCB_UNLOCK(stcb);
13305 /* wait for space now */
13306 if (non_blocking) {
13307 /* Non-blocking io in place out */
13310 /* What about the INIT, send it maybe */
13311 if (queue_only_for_init) {
13312 if (hold_tcblock == 0) {
13313 SCTP_TCB_LOCK(stcb);
13316 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13317 /* a collision took us forward? */
13320 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13321 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13325 if ((net->flight_size > net->cwnd) &&
13326 (asoc->sctp_cmt_on_off == 0)) {
13327 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13329 } else if (asoc->ifp_had_enobuf) {
13330 SCTP_STAT_INCR(sctps_ifnomemqueued);
13331 if (net->flight_size > (2 * net->mtu)) {
13334 asoc->ifp_had_enobuf = 0;
13336 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13337 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13338 (stcb->asoc.total_flight > 0) &&
13339 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13340 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13343 * Ok, Nagle is set on and we have data outstanding.
13344 * Don't send anything and let SACKs drive out the
13345 * data unless we have a "full" segment to send.
13347 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13348 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13350 SCTP_STAT_INCR(sctps_naglequeued);
13353 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13354 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13355 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13357 SCTP_STAT_INCR(sctps_naglesent);
13360 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13362 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13363 nagle_applies, un_sent);
13364 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13365 stcb->asoc.total_flight,
13366 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13368 if (queue_only_for_init)
13369 queue_only_for_init = 0;
13370 if ((queue_only == 0) && (nagle_applies == 0)) {
13372 * need to start chunk output
13373 * before blocking.. note that if
13374 * a lock is already applied, then
13375 * the input via the net is happening
13376 * and I don't need to start output :-D
13378 if (hold_tcblock == 0) {
13379 if (SCTP_TCB_TRYLOCK(stcb)) {
13381 sctp_chunk_output(inp,
13383 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13386 sctp_chunk_output(inp,
13388 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13390 if (hold_tcblock == 1) {
13391 SCTP_TCB_UNLOCK(stcb);
13395 SOCKBUF_LOCK(&so->so_snd);
13397 * This is a bit strange, but I think it will
13398 * work. The total_output_queue_size is locked and
13399 * protected by the TCB_LOCK, which we just released.
13400 * There is a race that can occur between releasing it
13401 * above, and me getting the socket lock, where sacks
13402 * come in but we have not put the SB_WAIT on the
13403 * so_snd buffer to get the wakeup. After the LOCK
13404 * is applied the sack_processing will also need to
13405 * LOCK the so->so_snd to do the actual sowwakeup(). So
13406 * once we have the socket buffer lock if we recheck the
13407 * size we KNOW we will get to sleep safely with the
13408 * wakeup flag in place.
13410 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13411 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13412 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13413 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13414 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13415 asoc, (size_t)uio->uio_resid);
13418 stcb->block_entry = &be;
13419 error = sbwait(&so->so_snd);
13420 stcb->block_entry = NULL;
13422 if (error || so->so_error || be.error) {
13425 error = so->so_error;
13430 SOCKBUF_UNLOCK(&so->so_snd);
13434 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13435 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13436 asoc, stcb->asoc.total_output_queue_size);
13439 SOCKBUF_UNLOCK(&so->so_snd);
13440 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13444 SCTP_TCB_SEND_LOCK(stcb);
13445 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13446 SCTP_TCB_SEND_UNLOCK(stcb);
13450 if (sp->msg_is_complete == 0) {
13451 strm->last_msg_incomplete = 1;
13452 if (stcb->asoc.idata_supported == 0) {
13453 asoc->stream_locked = 1;
13454 asoc->stream_locked_on = srcv->sinfo_stream;
13457 sp->sender_all_done = 1;
13458 strm->last_msg_incomplete = 0;
13459 asoc->stream_locked = 0;
13462 SCTP_PRINTF("Huh no sp TSNH?\n");
13463 strm->last_msg_incomplete = 0;
13464 asoc->stream_locked = 0;
13466 SCTP_TCB_SEND_UNLOCK(stcb);
13467 if (uio->uio_resid == 0) {
13468 got_all_of_the_send = 1;
13471 /* We send in a 0, since we do NOT have any locks */
13472 error = sctp_msg_append(stcb, net, top, srcv, 0);
13474 if (srcv->sinfo_flags & SCTP_EOF) {
13476 * This should only happen for Panda for the mbuf
13477 * send case, which does NOT yet support EEOR mode.
13478 * Thus, we can just set this flag to do the proper
13481 got_all_of_the_send = 1;
13489 if ((srcv->sinfo_flags & SCTP_EOF) &&
13490 (got_all_of_the_send == 1)) {
13491 SCTP_STAT_INCR(sctps_sends_with_eof);
13493 if (hold_tcblock == 0) {
13494 SCTP_TCB_LOCK(stcb);
13497 if (TAILQ_EMPTY(&asoc->send_queue) &&
13498 TAILQ_EMPTY(&asoc->sent_queue) &&
13499 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13500 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13503 /* there is nothing queued to send, so I'm done... */
13504 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13505 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13506 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13507 struct sctp_nets *netp;
13509 /* only send SHUTDOWN the first time through */
13510 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13511 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13513 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13514 sctp_stop_timers_for_shutdown(stcb);
13515 if (stcb->asoc.alternate) {
13516 netp = stcb->asoc.alternate;
13518 netp = stcb->asoc.primary_destination;
13520 sctp_send_shutdown(stcb, netp);
13521 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13523 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13524 asoc->primary_destination);
13528 * we still got (or just got) data to send, so set
13532 * XXX sockets draft says that SCTP_EOF should be
13533 * sent with no data. currently, we will allow user
13534 * data to be sent first and move to
13537 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13538 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13539 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13540 if (hold_tcblock == 0) {
13541 SCTP_TCB_LOCK(stcb);
13544 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13545 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13547 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13548 if (TAILQ_EMPTY(&asoc->send_queue) &&
13549 TAILQ_EMPTY(&asoc->sent_queue) &&
13550 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13551 struct mbuf *op_err;
13552 char msg[SCTP_DIAG_INFO_LEN];
13555 if (free_cnt_applied) {
13556 atomic_add_int(&stcb->asoc.refcnt, -1);
13557 free_cnt_applied = 0;
13559 snprintf(msg, sizeof(msg),
13560 "%s:%d at %s", __FILE__, __LINE__, __func__);
13561 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13563 sctp_abort_an_association(stcb->sctp_ep, stcb,
13564 op_err, SCTP_SO_LOCKED);
13566 * now relock the stcb so everything
13573 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13574 asoc->primary_destination);
13575 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13580 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13581 some_on_control = 1;
13583 if (queue_only_for_init) {
13584 if (hold_tcblock == 0) {
13585 SCTP_TCB_LOCK(stcb);
13588 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13589 /* a collision took us forward? */
13592 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13593 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13597 if ((net->flight_size > net->cwnd) &&
13598 (stcb->asoc.sctp_cmt_on_off == 0)) {
13599 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13601 } else if (asoc->ifp_had_enobuf) {
13602 SCTP_STAT_INCR(sctps_ifnomemqueued);
13603 if (net->flight_size > (2 * net->mtu)) {
13606 asoc->ifp_had_enobuf = 0;
13608 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13609 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13610 (stcb->asoc.total_flight > 0) &&
13611 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13612 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13614 * Ok, Nagle is set on and we have data outstanding.
13615 * Don't send anything and let SACKs drive out the
13616 * data unless wen have a "full" segment to send.
13618 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13619 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13621 SCTP_STAT_INCR(sctps_naglequeued);
13624 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13625 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13626 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13628 SCTP_STAT_INCR(sctps_naglesent);
13631 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13632 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13633 nagle_applies, un_sent);
13634 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13635 stcb->asoc.total_flight,
13636 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13638 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13639 /* we can attempt to send too. */
13640 if (hold_tcblock == 0) {
13642 * If there is activity recv'ing sacks no need to
13645 if (SCTP_TCB_TRYLOCK(stcb)) {
13646 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13650 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13652 } else if ((queue_only == 0) &&
13653 (stcb->asoc.peers_rwnd == 0) &&
13654 (stcb->asoc.total_flight == 0)) {
13655 /* We get to have a probe outstanding */
13656 if (hold_tcblock == 0) {
13658 SCTP_TCB_LOCK(stcb);
13660 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13661 } else if (some_on_control) {
13662 int num_out, reason, frag_point;
13664 /* Here we do control only */
13665 if (hold_tcblock == 0) {
13667 SCTP_TCB_LOCK(stcb);
13669 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13670 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13671 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13673 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13674 queue_only, stcb->asoc.peers_rwnd, un_sent,
13675 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13676 stcb->asoc.total_output_queue_size, error);
13681 if (local_soresv && stcb) {
13682 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13684 if (create_lock_applied) {
13685 SCTP_ASOC_CREATE_UNLOCK(inp);
13687 if ((stcb) && hold_tcblock) {
13688 SCTP_TCB_UNLOCK(stcb);
13690 if (stcb && free_cnt_applied) {
13691 atomic_add_int(&stcb->asoc.refcnt, -1);
13695 if (mtx_owned(&stcb->tcb_mtx)) {
13696 panic("Leaving with tcb mtx owned?");
13698 if (mtx_owned(&stcb->tcb_send_mtx)) {
13699 panic("Leaving with tcb send mtx owned?");
13707 sctp_m_freem(control);
13714 * generate an AUTHentication chunk, if required
13717 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13718 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13719 struct sctp_tcb *stcb, uint8_t chunk)
13721 struct mbuf *m_auth;
13722 struct sctp_auth_chunk *auth;
13726 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13730 if (stcb->asoc.auth_supported == 0) {
13733 /* does the requested chunk require auth? */
13734 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13737 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13738 if (m_auth == NULL) {
13742 /* reserve some space if this will be the first mbuf */
13744 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13745 /* fill in the AUTH chunk details */
13746 auth = mtod(m_auth, struct sctp_auth_chunk *);
13747 memset(auth, 0, sizeof(*auth));
13748 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13749 auth->ch.chunk_flags = 0;
13750 chunk_len = sizeof(*auth) +
13751 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13752 auth->ch.chunk_length = htons(chunk_len);
13753 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13754 /* key id and hmac digest will be computed and filled in upon send */
13756 /* save the offset where the auth was inserted into the chain */
13758 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13759 *offset += SCTP_BUF_LEN(cn);
13762 /* update length and return pointer to the auth chunk */
13763 SCTP_BUF_LEN(m_auth) = chunk_len;
13764 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13765 if (auth_ret != NULL)
13773 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13775 struct nd_prefix *pfx = NULL;
13776 struct nd_pfxrouter *pfxrtr = NULL;
13777 struct sockaddr_in6 gw6;
13779 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13782 /* get prefix entry of address */
13784 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13785 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13787 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13788 &src6->sin6_addr, &pfx->ndpr_mask))
13791 /* no prefix entry in the prefix list */
13794 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13795 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13799 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13800 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13802 /* search installed gateway from prefix entry */
13803 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13804 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13805 gw6.sin6_family = AF_INET6;
13806 gw6.sin6_len = sizeof(struct sockaddr_in6);
13807 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13808 sizeof(struct in6_addr));
13809 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13810 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13811 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13812 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13813 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13815 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13820 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13826 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13829 struct sockaddr_in *sin, *mask;
13830 struct ifaddr *ifa;
13831 struct in_addr srcnetaddr, gwnetaddr;
13833 if (ro == NULL || ro->ro_rt == NULL ||
13834 sifa->address.sa.sa_family != AF_INET) {
13837 ifa = (struct ifaddr *)sifa->ifa;
13838 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13839 sin = &sifa->address.sin;
13840 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13841 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13842 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13843 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13845 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13846 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13847 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13848 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13849 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13850 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {