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)
3575 struct sctp_initmsg initmsg;
3577 struct sockaddr_in sin;
3580 struct sockaddr_in6 sin6;
3582 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3584 tot_len = SCTP_BUF_LEN(control);
3585 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3586 rem_len = tot_len - off;
3587 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3588 /* There is not enough room for one more. */
3592 m_copydata(control, off, 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 ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3599 /* We don't have the complete CMSG. */
3603 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3604 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3605 if (cmh.cmsg_level == IPPROTO_SCTP) {
3606 switch (cmh.cmsg_type) {
3608 if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
3612 m_copydata(control, cmsg_data_off, sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3613 if (initmsg.sinit_max_attempts)
3614 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3615 if (initmsg.sinit_num_ostreams)
3616 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3617 if (initmsg.sinit_max_instreams)
3618 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3619 if (initmsg.sinit_max_init_timeo)
3620 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3621 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3622 struct sctp_stream_out *tmp_str;
3624 #if defined(SCTP_DETAILED_STR_STATS)
3628 /* Default is NOT correct */
3629 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3630 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3631 SCTP_TCB_UNLOCK(stcb);
3632 SCTP_MALLOC(tmp_str,
3633 struct sctp_stream_out *,
3634 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3636 SCTP_TCB_LOCK(stcb);
3637 if (tmp_str != NULL) {
3638 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3639 stcb->asoc.strmout = tmp_str;
3640 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3642 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3644 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3645 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3646 stcb->asoc.strmout[i].chunks_on_queues = 0;
3647 stcb->asoc.strmout[i].next_mid_ordered = 0;
3648 stcb->asoc.strmout[i].next_mid_unordered = 0;
3649 #if defined(SCTP_DETAILED_STR_STATS)
3650 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3651 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3652 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3655 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3656 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3658 stcb->asoc.strmout[i].sid = i;
3659 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3660 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3661 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3666 case SCTP_DSTADDRV4:
3667 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3671 memset(&sin, 0, sizeof(struct sockaddr_in));
3672 sin.sin_family = AF_INET;
3673 sin.sin_len = sizeof(struct sockaddr_in);
3674 sin.sin_port = stcb->rport;
3675 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3676 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3677 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3678 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3682 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3683 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3690 case SCTP_DSTADDRV6:
3691 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3695 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3696 sin6.sin6_family = AF_INET6;
3697 sin6.sin6_len = sizeof(struct sockaddr_in6);
3698 sin6.sin6_port = stcb->rport;
3699 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3700 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3701 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3706 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3707 in6_sin6_2_sin(&sin, &sin6);
3708 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3709 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3710 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3714 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3715 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3721 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3722 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3736 #if defined(INET) || defined(INET6)
3737 static struct sctp_tcb *
3738 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3740 struct mbuf *control,
3741 struct sctp_nets **net_p,
3745 struct sctp_tcb *stcb;
3746 struct sockaddr *addr;
3748 struct sockaddr_in sin;
3751 struct sockaddr_in6 sin6;
3753 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3755 tot_len = SCTP_BUF_LEN(control);
3756 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3757 rem_len = tot_len - off;
3758 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3759 /* There is not enough room for one more. */
3763 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3764 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3765 /* We dont't have a complete CMSG header. */
3769 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3770 /* We don't have the complete CMSG. */
3774 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3775 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3776 if (cmh.cmsg_level == IPPROTO_SCTP) {
3777 switch (cmh.cmsg_type) {
3779 case SCTP_DSTADDRV4:
3780 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3784 memset(&sin, 0, sizeof(struct sockaddr_in));
3785 sin.sin_family = AF_INET;
3786 sin.sin_len = sizeof(struct sockaddr_in);
3787 sin.sin_port = port;
3788 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3789 addr = (struct sockaddr *)&sin;
3793 case SCTP_DSTADDRV6:
3794 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3798 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3799 sin6.sin6_family = AF_INET6;
3800 sin6.sin6_len = sizeof(struct sockaddr_in6);
3801 sin6.sin6_port = port;
3802 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3804 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3805 in6_sin6_2_sin(&sin, &sin6);
3806 addr = (struct sockaddr *)&sin;
3809 addr = (struct sockaddr *)&sin6;
3817 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3828 static struct mbuf *
3829 sctp_add_cookie(struct mbuf *init, int init_offset,
3830 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3832 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3833 struct sctp_state_cookie *stc;
3834 struct sctp_paramhdr *ph;
3839 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3840 sizeof(struct sctp_paramhdr)), 0,
3841 M_NOWAIT, 1, MT_DATA);
3845 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3846 if (copy_init == NULL) {
3850 #ifdef SCTP_MBUF_LOGGING
3851 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3852 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3855 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3857 if (copy_initack == NULL) {
3859 sctp_m_freem(copy_init);
3862 #ifdef SCTP_MBUF_LOGGING
3863 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3864 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3867 /* easy side we just drop it on the end */
3868 ph = mtod(mret, struct sctp_paramhdr *);
3869 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3870 sizeof(struct sctp_paramhdr);
3871 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3872 sizeof(struct sctp_paramhdr));
3873 ph->param_type = htons(SCTP_STATE_COOKIE);
3874 ph->param_length = 0; /* fill in at the end */
3875 /* Fill in the stc cookie data */
3876 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3878 /* tack the INIT and then the INIT-ACK onto the chain */
3880 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3881 cookie_sz += SCTP_BUF_LEN(m_at);
3882 if (SCTP_BUF_NEXT(m_at) == NULL) {
3883 SCTP_BUF_NEXT(m_at) = copy_init;
3887 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3888 cookie_sz += SCTP_BUF_LEN(m_at);
3889 if (SCTP_BUF_NEXT(m_at) == NULL) {
3890 SCTP_BUF_NEXT(m_at) = copy_initack;
3894 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3895 cookie_sz += SCTP_BUF_LEN(m_at);
3896 if (SCTP_BUF_NEXT(m_at) == NULL) {
3900 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3902 /* no space, so free the entire chain */
3906 SCTP_BUF_LEN(sig) = 0;
3907 SCTP_BUF_NEXT(m_at) = sig;
3909 foo = (uint8_t *)(mtod(sig, caddr_t)+sig_offset);
3910 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3912 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3913 cookie_sz += SCTP_SIGNATURE_SIZE;
3914 ph->param_length = htons(cookie_sz);
3920 sctp_get_ect(struct sctp_tcb *stcb)
3922 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3923 return (SCTP_ECT0_BIT);
3929 #if defined(INET) || defined(INET6)
3931 sctp_handle_no_route(struct sctp_tcb *stcb,
3932 struct sctp_nets *net,
3935 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3939 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3940 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3941 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3942 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3943 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3947 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3948 net->dest_state &= ~SCTP_ADDR_PF;
3952 if (net == stcb->asoc.primary_destination) {
3953 /* need a new primary */
3954 struct sctp_nets *alt;
3956 alt = sctp_find_alternate_net(stcb, net, 0);
3958 if (stcb->asoc.alternate) {
3959 sctp_free_remote_addr(stcb->asoc.alternate);
3961 stcb->asoc.alternate = alt;
3962 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3963 if (net->ro._s_addr) {
3964 sctp_free_ifa(net->ro._s_addr);
3965 net->ro._s_addr = NULL;
3967 net->src_addr_selected = 0;
3976 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3977 struct sctp_tcb *stcb, /* may be NULL */
3978 struct sctp_nets *net,
3979 struct sockaddr *to,
3981 uint32_t auth_offset,
3982 struct sctp_auth_chunk *auth,
3983 uint16_t auth_keyid,
3984 int nofragment_flag,
3991 union sctp_sockstore *over_addr,
3992 uint8_t mflowtype, uint32_t mflowid,
3993 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3994 int so_locked SCTP_UNUSED
4000 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4002 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4003 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4004 * - fill in the HMAC digest of any AUTH chunk in the packet.
4005 * - calculate and fill in the SCTP checksum.
4006 * - prepend an IP address header.
4007 * - if boundall use INADDR_ANY.
4008 * - if boundspecific do source address selection.
4009 * - set fragmentation option for ipV4.
4010 * - On return from IP output, check/adjust mtu size of output
4011 * interface and smallest_mtu size as well.
4013 /* Will need ifdefs around this */
4015 struct sctphdr *sctphdr;
4018 #if defined(INET) || defined(INET6)
4021 #if defined(INET) || defined(INET6)
4023 sctp_route_t *ro = NULL;
4024 struct udphdr *udp = NULL;
4027 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4028 struct socket *so = NULL;
4031 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4032 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4036 #if defined(INET) || defined(INET6)
4038 vrf_id = stcb->asoc.vrf_id;
4040 vrf_id = inp->def_vrf_id;
4043 /* fill in the HMAC digest for any AUTH chunk in the packet */
4044 if ((auth != NULL) && (stcb != NULL)) {
4045 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4049 tos_value = net->dscp;
4051 tos_value = stcb->asoc.default_dscp;
4053 tos_value = inp->sctp_ep.default_dscp;
4056 switch (to->sa_family) {
4060 struct ip *ip = NULL;
4061 sctp_route_t iproute;
4064 len = SCTP_MIN_V4_OVERHEAD;
4066 len += sizeof(struct udphdr);
4068 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4071 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4074 SCTP_ALIGN_TO_END(newm, len);
4075 SCTP_BUF_LEN(newm) = len;
4076 SCTP_BUF_NEXT(newm) = m;
4079 m->m_pkthdr.flowid = net->flowid;
4080 M_HASHTYPE_SET(m, net->flowtype);
4082 m->m_pkthdr.flowid = mflowid;
4083 M_HASHTYPE_SET(m, mflowtype);
4085 packet_length = sctp_calculate_len(m);
4086 ip = mtod(m, struct ip *);
4087 ip->ip_v = IPVERSION;
4088 ip->ip_hl = (sizeof(struct ip) >> 2);
4089 if (tos_value == 0) {
4091 * This means especially, that it is not set
4092 * at the SCTP layer. So use the value from
4095 tos_value = inp->ip_inp.inp.inp_ip_tos;
4099 tos_value |= sctp_get_ect(stcb);
4101 if ((nofragment_flag) && (port == 0)) {
4102 ip->ip_off = htons(IP_DF);
4104 ip->ip_off = htons(0);
4106 /* FreeBSD has a function for ip_id's */
4109 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4110 ip->ip_len = htons(packet_length);
4111 ip->ip_tos = tos_value;
4113 ip->ip_p = IPPROTO_UDP;
4115 ip->ip_p = IPPROTO_SCTP;
4120 memset(&iproute, 0, sizeof(iproute));
4121 memcpy(&ro->ro_dst, to, to->sa_len);
4123 ro = (sctp_route_t *)&net->ro;
4125 /* Now the address selection part */
4126 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4128 /* call the routine to select the src address */
4129 if (net && out_of_asoc_ok == 0) {
4130 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4131 sctp_free_ifa(net->ro._s_addr);
4132 net->ro._s_addr = NULL;
4133 net->src_addr_selected = 0;
4139 if (net->src_addr_selected == 0) {
4140 /* Cache the source address */
4141 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4144 net->src_addr_selected = 1;
4146 if (net->ro._s_addr == NULL) {
4147 /* No route to host */
4148 net->src_addr_selected = 0;
4149 sctp_handle_no_route(stcb, net, so_locked);
4150 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4152 return (EHOSTUNREACH);
4154 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4156 if (over_addr == NULL) {
4157 struct sctp_ifa *_lsrc;
4159 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4163 if (_lsrc == NULL) {
4164 sctp_handle_no_route(stcb, net, so_locked);
4165 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4167 return (EHOSTUNREACH);
4169 ip->ip_src = _lsrc->address.sin.sin_addr;
4170 sctp_free_ifa(_lsrc);
4172 ip->ip_src = over_addr->sin.sin_addr;
4173 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4177 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4178 sctp_handle_no_route(stcb, net, so_locked);
4179 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4181 return (EHOSTUNREACH);
4183 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4184 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4185 udp->uh_dport = port;
4186 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4188 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4192 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4194 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4197 sctphdr->src_port = src_port;
4198 sctphdr->dest_port = dest_port;
4199 sctphdr->v_tag = v_tag;
4200 sctphdr->checksum = 0;
4203 * If source address selection fails and we find no
4204 * route then the ip_output should fail as well with
4205 * a NO_ROUTE_TO_HOST type error. We probably should
4206 * catch that somewhere and abort the association
4207 * right away (assuming this is an INIT being sent).
4209 if (ro->ro_rt == NULL) {
4211 * src addr selection failed to find a route
4212 * (or valid source addr), so we can't get
4213 * there from here (yet)!
4215 sctp_handle_no_route(stcb, net, so_locked);
4216 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4218 return (EHOSTUNREACH);
4220 if (ro != &iproute) {
4221 memcpy(&iproute, ro, sizeof(*ro));
4223 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4224 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4225 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4226 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4230 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4231 /* failed to prepend data, give up */
4232 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4236 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4238 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4239 SCTP_STAT_INCR(sctps_sendswcrc);
4241 SCTP_ENABLE_UDP_CSUM(o_pak);
4244 m->m_pkthdr.csum_flags = CSUM_SCTP;
4245 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4246 SCTP_STAT_INCR(sctps_sendhwcrc);
4248 #ifdef SCTP_PACKET_LOGGING
4249 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4250 sctp_packet_log(o_pak);
4252 /* send it out. table id is taken from stcb */
4253 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4254 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4255 so = SCTP_INP_SO(inp);
4256 SCTP_SOCKET_UNLOCK(so, 0);
4259 SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
4260 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4261 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4262 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4263 atomic_add_int(&stcb->asoc.refcnt, 1);
4264 SCTP_TCB_UNLOCK(stcb);
4265 SCTP_SOCKET_LOCK(so, 0);
4266 SCTP_TCB_LOCK(stcb);
4267 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4271 UDPSTAT_INC(udps_opackets);
4273 SCTP_STAT_INCR(sctps_sendpackets);
4274 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4276 SCTP_STAT_INCR(sctps_senderrors);
4278 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4280 /* free tempy routes */
4283 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4284 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4287 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4290 mtu -= sizeof(struct udphdr);
4292 if (mtu < net->mtu) {
4293 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4294 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4299 } else if (ro->ro_rt == NULL) {
4300 /* route was freed */
4301 if (net->ro._s_addr &&
4302 net->src_addr_selected) {
4303 sctp_free_ifa(net->ro._s_addr);
4304 net->ro._s_addr = NULL;
4306 net->src_addr_selected = 0;
4315 uint32_t flowlabel, flowinfo;
4316 struct ip6_hdr *ip6h;
4317 struct route_in6 ip6route;
4319 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4321 struct sockaddr_in6 lsa6_storage;
4323 u_short prev_port = 0;
4327 flowlabel = net->flowlabel;
4329 flowlabel = stcb->asoc.default_flowlabel;
4331 flowlabel = inp->sctp_ep.default_flowlabel;
4333 if (flowlabel == 0) {
4335 * This means especially, that it is not set
4336 * at the SCTP layer. So use the value from
4339 flowlabel = ntohl(((struct inpcb *)inp)->inp_flow);
4341 flowlabel &= 0x000fffff;
4342 len = SCTP_MIN_OVERHEAD;
4344 len += sizeof(struct udphdr);
4346 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4349 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4352 SCTP_ALIGN_TO_END(newm, len);
4353 SCTP_BUF_LEN(newm) = len;
4354 SCTP_BUF_NEXT(newm) = m;
4357 m->m_pkthdr.flowid = net->flowid;
4358 M_HASHTYPE_SET(m, net->flowtype);
4360 m->m_pkthdr.flowid = mflowid;
4361 M_HASHTYPE_SET(m, mflowtype);
4363 packet_length = sctp_calculate_len(m);
4365 ip6h = mtod(m, struct ip6_hdr *);
4366 /* protect *sin6 from overwrite */
4367 sin6 = (struct sockaddr_in6 *)to;
4371 /* KAME hack: embed scopeid */
4372 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4373 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4378 memset(&ip6route, 0, sizeof(ip6route));
4379 ro = (sctp_route_t *)&ip6route;
4380 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4382 ro = (sctp_route_t *)&net->ro;
4385 * We assume here that inp_flow is in host byte
4386 * order within the TCB!
4388 if (tos_value == 0) {
4390 * This means especially, that it is not set
4391 * at the SCTP layer. So use the value from
4394 tos_value = (ntohl(((struct inpcb *)inp)->inp_flow) >> 20) & 0xff;
4398 tos_value |= sctp_get_ect(stcb);
4402 flowinfo |= tos_value;
4404 flowinfo |= flowlabel;
4405 ip6h->ip6_flow = htonl(flowinfo);
4407 ip6h->ip6_nxt = IPPROTO_UDP;
4409 ip6h->ip6_nxt = IPPROTO_SCTP;
4411 ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4412 ip6h->ip6_dst = sin6->sin6_addr;
4415 * Add SRC address selection here: we can only reuse
4416 * to a limited degree the kame src-addr-sel, since
4417 * we can try their selection but it may not be
4420 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4421 lsa6_tmp.sin6_family = AF_INET6;
4422 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4424 if (net && out_of_asoc_ok == 0) {
4425 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4426 sctp_free_ifa(net->ro._s_addr);
4427 net->ro._s_addr = NULL;
4428 net->src_addr_selected = 0;
4434 if (net->src_addr_selected == 0) {
4435 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4436 /* KAME hack: embed scopeid */
4437 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4438 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4442 /* Cache the source address */
4443 net->ro._s_addr = sctp_source_address_selection(inp,
4449 (void)sa6_recoverscope(sin6);
4450 net->src_addr_selected = 1;
4452 if (net->ro._s_addr == NULL) {
4453 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4454 net->src_addr_selected = 0;
4455 sctp_handle_no_route(stcb, net, so_locked);
4456 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4458 return (EHOSTUNREACH);
4460 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4462 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4463 /* KAME hack: embed scopeid */
4464 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4465 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4469 if (over_addr == NULL) {
4470 struct sctp_ifa *_lsrc;
4472 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4476 if (_lsrc == NULL) {
4477 sctp_handle_no_route(stcb, net, so_locked);
4478 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4480 return (EHOSTUNREACH);
4482 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4483 sctp_free_ifa(_lsrc);
4485 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4486 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4488 (void)sa6_recoverscope(sin6);
4490 lsa6->sin6_port = inp->sctp_lport;
4492 if (ro->ro_rt == NULL) {
4494 * src addr selection failed to find a route
4495 * (or valid source addr), so we can't get
4498 sctp_handle_no_route(stcb, net, so_locked);
4499 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4501 return (EHOSTUNREACH);
4504 * XXX: sa6 may not have a valid sin6_scope_id in
4505 * the non-SCOPEDROUTING case.
4507 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4508 lsa6_storage.sin6_family = AF_INET6;
4509 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4510 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4511 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4512 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4517 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4518 lsa6_storage.sin6_port = inp->sctp_lport;
4519 lsa6 = &lsa6_storage;
4520 ip6h->ip6_src = lsa6->sin6_addr;
4523 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4524 sctp_handle_no_route(stcb, net, so_locked);
4525 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4527 return (EHOSTUNREACH);
4529 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4530 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4531 udp->uh_dport = port;
4532 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4534 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4536 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4539 sctphdr->src_port = src_port;
4540 sctphdr->dest_port = dest_port;
4541 sctphdr->v_tag = v_tag;
4542 sctphdr->checksum = 0;
4545 * We set the hop limit now since there is a good
4546 * chance that our ro pointer is now filled
4548 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4549 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4552 /* Copy to be sure something bad is not happening */
4553 sin6->sin6_addr = ip6h->ip6_dst;
4554 lsa6->sin6_addr = ip6h->ip6_src;
4557 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4558 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4559 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4560 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4561 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4563 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4565 * preserve the port and scope for link
4568 prev_scope = sin6->sin6_scope_id;
4569 prev_port = sin6->sin6_port;
4572 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4573 /* failed to prepend data, give up */
4575 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4578 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4580 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4581 SCTP_STAT_INCR(sctps_sendswcrc);
4582 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4583 udp->uh_sum = 0xffff;
4586 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4587 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4588 SCTP_STAT_INCR(sctps_sendhwcrc);
4590 /* send it out. table id is taken from stcb */
4591 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4592 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4593 so = SCTP_INP_SO(inp);
4594 SCTP_SOCKET_UNLOCK(so, 0);
4597 #ifdef SCTP_PACKET_LOGGING
4598 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4599 sctp_packet_log(o_pak);
4601 SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
4602 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4603 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4604 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4605 atomic_add_int(&stcb->asoc.refcnt, 1);
4606 SCTP_TCB_UNLOCK(stcb);
4607 SCTP_SOCKET_LOCK(so, 0);
4608 SCTP_TCB_LOCK(stcb);
4609 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4613 /* for link local this must be done */
4614 sin6->sin6_scope_id = prev_scope;
4615 sin6->sin6_port = prev_port;
4617 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4619 UDPSTAT_INC(udps_opackets);
4621 SCTP_STAT_INCR(sctps_sendpackets);
4622 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4624 SCTP_STAT_INCR(sctps_senderrors);
4627 /* Now if we had a temp route free it */
4631 * PMTU check versus smallest asoc MTU goes
4634 if (ro->ro_rt == NULL) {
4635 /* Route was freed */
4636 if (net->ro._s_addr &&
4637 net->src_addr_selected) {
4638 sctp_free_ifa(net->ro._s_addr);
4639 net->ro._s_addr = NULL;
4641 net->src_addr_selected = 0;
4643 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4644 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4647 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4650 mtu -= sizeof(struct udphdr);
4652 if (mtu < net->mtu) {
4653 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4654 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4660 if (ND_IFINFO(ifp)->linkmtu &&
4661 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4662 sctp_mtu_size_reset(inp,
4664 ND_IFINFO(ifp)->linkmtu);
4672 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4673 ((struct sockaddr *)to)->sa_family);
4675 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4682 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4683 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4688 struct mbuf *m, *m_last;
4689 struct sctp_nets *net;
4690 struct sctp_init_chunk *init;
4691 struct sctp_supported_addr_param *sup_addr;
4692 struct sctp_adaptation_layer_indication *ali;
4693 struct sctp_supported_chunk_types_param *pr_supported;
4694 struct sctp_paramhdr *ph;
4695 int cnt_inits_to = 0;
4697 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4699 /* INIT's always go to the primary (and usually ONLY address) */
4700 net = stcb->asoc.primary_destination;
4702 net = TAILQ_FIRST(&stcb->asoc.nets);
4707 /* we confirm any address we send an INIT to */
4708 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4709 (void)sctp_set_primary_addr(stcb, NULL, net);
4711 /* we confirm any address we send an INIT to */
4712 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4714 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4716 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4718 * special hook, if we are sending to link local it will not
4719 * show up in our private address count.
4721 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4725 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4726 /* This case should not happen */
4727 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4730 /* start the INIT timer */
4731 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4733 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4735 /* No memory, INIT timer will re-attempt. */
4736 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4739 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4741 /* Now lets put the chunk header in place */
4742 init = mtod(m, struct sctp_init_chunk *);
4743 /* now the chunk header */
4744 init->ch.chunk_type = SCTP_INITIATION;
4745 init->ch.chunk_flags = 0;
4746 /* fill in later from mbuf we build */
4747 init->ch.chunk_length = 0;
4748 /* place in my tag */
4749 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4750 /* set up some of the credits. */
4751 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4752 SCTP_MINIMAL_RWND));
4753 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4754 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4755 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4757 /* Adaptation layer indication parameter */
4758 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4759 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4760 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4761 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4762 ali->ph.param_length = htons(parameter_len);
4763 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4764 chunk_len += parameter_len;
4768 if (stcb->asoc.ecn_supported == 1) {
4769 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4771 ph->param_type = htons(SCTP_ECN_CAPABLE);
4772 ph->param_length = htons(parameter_len);
4773 chunk_len += parameter_len;
4776 /* PR-SCTP supported parameter */
4777 if (stcb->asoc.prsctp_supported == 1) {
4778 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4779 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4780 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4781 ph->param_length = htons(parameter_len);
4782 chunk_len += parameter_len;
4785 /* Add NAT friendly parameter. */
4786 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4787 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4788 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4789 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4790 ph->param_length = htons(parameter_len);
4791 chunk_len += parameter_len;
4794 /* And now tell the peer which extensions we support */
4796 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4797 if (stcb->asoc.prsctp_supported == 1) {
4798 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4799 if (stcb->asoc.idata_supported) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4803 if (stcb->asoc.auth_supported == 1) {
4804 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4806 if (stcb->asoc.asconf_supported == 1) {
4807 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4808 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4810 if (stcb->asoc.reconfig_supported == 1) {
4811 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4813 if (stcb->asoc.idata_supported) {
4814 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4816 if (stcb->asoc.nrsack_supported == 1) {
4817 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4819 if (stcb->asoc.pktdrop_supported == 1) {
4820 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4823 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4824 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4825 pr_supported->ph.param_length = htons(parameter_len);
4826 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4827 chunk_len += parameter_len;
4829 /* add authentication parameters */
4830 if (stcb->asoc.auth_supported) {
4831 /* attach RANDOM parameter, if available */
4832 if (stcb->asoc.authinfo.random != NULL) {
4833 struct sctp_auth_random *randp;
4835 if (padding_len > 0) {
4836 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4837 chunk_len += padding_len;
4840 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4841 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4842 /* random key already contains the header */
4843 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4844 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4845 chunk_len += parameter_len;
4847 /* add HMAC_ALGO parameter */
4848 if (stcb->asoc.local_hmacs != NULL) {
4849 struct sctp_auth_hmac_algo *hmacs;
4851 if (padding_len > 0) {
4852 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4853 chunk_len += padding_len;
4856 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4857 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4858 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4859 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4860 hmacs->ph.param_length = htons(parameter_len);
4861 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4862 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4863 chunk_len += parameter_len;
4865 /* add CHUNKS parameter */
4866 if (stcb->asoc.local_auth_chunks != NULL) {
4867 struct sctp_auth_chunk_list *chunks;
4869 if (padding_len > 0) {
4870 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4871 chunk_len += padding_len;
4874 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4875 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4876 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4877 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4878 chunks->ph.param_length = htons(parameter_len);
4879 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4880 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4881 chunk_len += parameter_len;
4885 /* now any cookie time extensions */
4886 if (stcb->asoc.cookie_preserve_req) {
4887 struct sctp_cookie_perserve_param *cookie_preserve;
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_cookie_perserve_param);
4895 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4896 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4897 cookie_preserve->ph.param_length = htons(parameter_len);
4898 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4899 stcb->asoc.cookie_preserve_req = 0;
4900 chunk_len += parameter_len;
4903 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4906 if (padding_len > 0) {
4907 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4908 chunk_len += padding_len;
4911 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4912 if (stcb->asoc.scope.ipv4_addr_legal) {
4913 parameter_len += (uint16_t)sizeof(uint16_t);
4915 if (stcb->asoc.scope.ipv6_addr_legal) {
4916 parameter_len += (uint16_t)sizeof(uint16_t);
4918 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4919 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4920 sup_addr->ph.param_length = htons(parameter_len);
4922 if (stcb->asoc.scope.ipv4_addr_legal) {
4923 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4925 if (stcb->asoc.scope.ipv6_addr_legal) {
4926 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4928 padding_len = 4 - 2 * i;
4929 chunk_len += parameter_len;
4932 SCTP_BUF_LEN(m) = chunk_len;
4933 /* now the addresses */
4935 * To optimize this we could put the scoping stuff into a structure
4936 * and remove the individual uint8's from the assoc structure. Then
4937 * we could just sifa in the address within the stcb. But for now
4938 * this is a quick hack to get the address stuff teased apart.
4940 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4942 &padding_len, &chunk_len);
4944 init->ch.chunk_length = htons(chunk_len);
4945 if (padding_len > 0) {
4946 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4951 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4952 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4953 (struct sockaddr *)&net->ro._l_addr,
4954 m, 0, NULL, 0, 0, 0, 0,
4955 inp->sctp_lport, stcb->rport, htonl(0),
4959 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4960 if (error == ENOBUFS) {
4961 stcb->asoc.ifp_had_enobuf = 1;
4962 SCTP_STAT_INCR(sctps_lowlevelerr);
4965 stcb->asoc.ifp_had_enobuf = 0;
4967 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4968 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4972 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4973 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4976 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4977 * being equal to the beginning of the params i.e. (iphlen +
4978 * sizeof(struct sctp_init_msg) parse through the parameters to the
4979 * end of the mbuf verifying that all parameters are known.
4981 * For unknown parameters build and return a mbuf with
4982 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4983 * processing this chunk stop, and set *abort_processing to 1.
4985 * By having param_offset be pre-set to where parameters begin it is
4986 * hoped that this routine may be reused in the future by new
4989 struct sctp_paramhdr *phdr, params;
4991 struct mbuf *mat, *m_tmp, *op_err, *op_err_last;
4992 int at, limit, pad_needed;
4993 uint16_t ptype, plen, padded_size;
4995 *abort_processing = 0;
4997 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
5002 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
5003 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5004 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
5005 ptype = ntohs(phdr->param_type);
5006 plen = ntohs(phdr->param_length);
5007 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5008 /* wacked parameter */
5009 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5012 limit -= SCTP_SIZE32(plen);
5014 * All parameters for all chunks that we know/understand are
5015 * listed here. We process them other places and make
5016 * appropriate stop actions per the upper bits. However this
5017 * is the generic routine processor's can call to get back
5018 * an operr.. to either incorporate (init-ack) or send.
5020 padded_size = SCTP_SIZE32(plen);
5022 /* Param's with variable size */
5023 case SCTP_HEARTBEAT_INFO:
5024 case SCTP_STATE_COOKIE:
5025 case SCTP_UNRECOG_PARAM:
5026 case SCTP_ERROR_CAUSE_IND:
5030 /* Param's with variable size within a range */
5031 case SCTP_CHUNK_LIST:
5032 case SCTP_SUPPORTED_CHUNK_EXT:
5033 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5034 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5039 case SCTP_SUPPORTED_ADDRTYPE:
5040 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5041 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5047 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5048 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5053 case SCTP_SET_PRIM_ADDR:
5054 case SCTP_DEL_IP_ADDRESS:
5055 case SCTP_ADD_IP_ADDRESS:
5056 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5057 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5063 /* Param's with a fixed size */
5064 case SCTP_IPV4_ADDRESS:
5065 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5066 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5071 case SCTP_IPV6_ADDRESS:
5072 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5073 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5078 case SCTP_COOKIE_PRESERVE:
5079 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5080 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5085 case SCTP_HAS_NAT_SUPPORT:
5088 case SCTP_PRSCTP_SUPPORTED:
5089 if (padded_size != sizeof(struct sctp_paramhdr)) {
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5095 case SCTP_ECN_CAPABLE:
5096 if (padded_size != sizeof(struct sctp_paramhdr)) {
5097 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5102 case SCTP_ULP_ADAPTATION:
5103 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5104 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5109 case SCTP_SUCCESS_REPORT:
5110 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5111 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5116 case SCTP_HOSTNAME_ADDRESS:
5118 /* Hostname parameters are deprecated. */
5119 struct sctp_gen_error_cause *cause;
5122 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5123 *abort_processing = 1;
5124 sctp_m_freem(op_err);
5128 l_len = SCTP_MIN_OVERHEAD;
5130 l_len = SCTP_MIN_V4_OVERHEAD;
5132 l_len += sizeof(struct sctp_chunkhdr);
5133 l_len += sizeof(struct sctp_gen_error_cause);
5134 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5135 if (op_err != NULL) {
5137 * Pre-reserve space for IP, SCTP,
5141 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5143 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5145 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5146 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5147 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5148 cause = mtod(op_err, struct sctp_gen_error_cause *);
5149 cause->code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5150 cause->length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
5151 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5152 if (SCTP_BUF_NEXT(op_err) == NULL) {
5153 sctp_m_freem(op_err);
5163 * we do not recognize the parameter figure out what
5166 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5167 if ((ptype & 0x4000) == 0x4000) {
5168 /* Report bit is set?? */
5169 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5170 if (op_err == NULL) {
5173 /* Ok need to try to get an mbuf */
5175 l_len = SCTP_MIN_OVERHEAD;
5177 l_len = SCTP_MIN_V4_OVERHEAD;
5179 l_len += sizeof(struct sctp_chunkhdr);
5180 l_len += sizeof(struct sctp_paramhdr);
5181 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5183 SCTP_BUF_LEN(op_err) = 0;
5185 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5187 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5190 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5191 op_err_last = op_err;
5194 if (op_err != NULL) {
5195 /* If we have space */
5196 struct sctp_paramhdr *param;
5198 if (pad_needed > 0) {
5199 op_err_last = sctp_add_pad_tombuf(op_err_last, pad_needed);
5201 if (op_err_last == NULL) {
5202 sctp_m_freem(op_err);
5205 goto more_processing;
5207 if (M_TRAILINGSPACE(op_err_last) < (int)sizeof(struct sctp_paramhdr)) {
5208 m_tmp = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
5209 if (m_tmp == NULL) {
5210 sctp_m_freem(op_err);
5213 goto more_processing;
5215 SCTP_BUF_LEN(m_tmp) = 0;
5216 SCTP_BUF_NEXT(m_tmp) = NULL;
5217 SCTP_BUF_NEXT(op_err_last) = m_tmp;
5218 op_err_last = m_tmp;
5220 param = (struct sctp_paramhdr *)(mtod(op_err_last, caddr_t)+SCTP_BUF_LEN(op_err_last));
5221 param->param_type = htons(SCTP_UNRECOG_PARAM);
5222 param->param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
5223 SCTP_BUF_LEN(op_err_last) += sizeof(struct sctp_paramhdr);
5224 SCTP_BUF_NEXT(op_err_last) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5225 if (SCTP_BUF_NEXT(op_err_last) == NULL) {
5226 sctp_m_freem(op_err);
5229 goto more_processing;
5231 while (SCTP_BUF_NEXT(op_err_last) != NULL) {
5232 op_err_last = SCTP_BUF_NEXT(op_err_last);
5235 if (plen % 4 != 0) {
5236 pad_needed = 4 - (plen % 4);
5243 if ((ptype & 0x8000) == 0x0000) {
5244 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5247 /* skip this chunk and continue processing */
5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5249 at += SCTP_SIZE32(plen);
5254 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5258 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5259 *abort_processing = 1;
5260 sctp_m_freem(op_err);
5264 struct sctp_paramhdr *param;
5267 l_len = SCTP_MIN_OVERHEAD;
5269 l_len = SCTP_MIN_V4_OVERHEAD;
5271 l_len += sizeof(struct sctp_chunkhdr);
5272 l_len += (2 * sizeof(struct sctp_paramhdr));
5273 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5275 SCTP_BUF_LEN(op_err) = 0;
5277 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5279 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5281 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5282 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5283 SCTP_BUF_LEN(op_err) = 2 * sizeof(struct sctp_paramhdr);
5284 param = mtod(op_err, struct sctp_paramhdr *);
5285 param->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5286 param->param_length = htons(2 * sizeof(struct sctp_paramhdr));
5288 param->param_type = htons(ptype);
5289 param->param_length = htons(plen);
5296 sctp_are_there_new_addresses(struct sctp_association *asoc,
5297 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5300 * Given a INIT packet, look through the packet to verify that there
5301 * are NO new addresses. As we go through the parameters add reports
5302 * of any un-understood parameters that require an error. Also we
5303 * must return (1) to drop the packet if we see a un-understood
5304 * parameter that tells us to drop the chunk.
5306 struct sockaddr *sa_touse;
5307 struct sockaddr *sa;
5308 struct sctp_paramhdr *phdr, params;
5309 uint16_t ptype, plen;
5311 struct sctp_nets *net;
5314 struct sockaddr_in sin4, *sa4;
5317 struct sockaddr_in6 sin6, *sa6;
5321 memset(&sin4, 0, sizeof(sin4));
5322 sin4.sin_family = AF_INET;
5323 sin4.sin_len = sizeof(sin4);
5326 memset(&sin6, 0, sizeof(sin6));
5327 sin6.sin6_family = AF_INET6;
5328 sin6.sin6_len = sizeof(sin6);
5330 /* First what about the src address of the pkt ? */
5332 switch (src->sa_family) {
5335 if (asoc->scope.ipv4_addr_legal) {
5342 if (asoc->scope.ipv6_addr_legal) {
5353 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5354 sa = (struct sockaddr *)&net->ro._l_addr;
5355 if (sa->sa_family == src->sa_family) {
5357 if (sa->sa_family == AF_INET) {
5358 struct sockaddr_in *src4;
5360 sa4 = (struct sockaddr_in *)sa;
5361 src4 = (struct sockaddr_in *)src;
5362 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5369 if (sa->sa_family == AF_INET6) {
5370 struct sockaddr_in6 *src6;
5372 sa6 = (struct sockaddr_in6 *)sa;
5373 src6 = (struct sockaddr_in6 *)src;
5374 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5383 /* New address added! no need to look further. */
5387 /* Ok so far lets munge through the rest of the packet */
5388 offset += sizeof(struct sctp_init_chunk);
5389 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5392 ptype = ntohs(phdr->param_type);
5393 plen = ntohs(phdr->param_length);
5396 case SCTP_IPV4_ADDRESS:
5398 struct sctp_ipv4addr_param *p4, p4_buf;
5400 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5403 phdr = sctp_get_next_param(in_initpkt, offset,
5404 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5408 if (asoc->scope.ipv4_addr_legal) {
5409 p4 = (struct sctp_ipv4addr_param *)phdr;
5410 sin4.sin_addr.s_addr = p4->addr;
5411 sa_touse = (struct sockaddr *)&sin4;
5417 case SCTP_IPV6_ADDRESS:
5419 struct sctp_ipv6addr_param *p6, p6_buf;
5421 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5424 phdr = sctp_get_next_param(in_initpkt, offset,
5425 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5429 if (asoc->scope.ipv6_addr_legal) {
5430 p6 = (struct sctp_ipv6addr_param *)phdr;
5431 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5433 sa_touse = (struct sockaddr *)&sin6;
5443 /* ok, sa_touse points to one to check */
5445 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5446 sa = (struct sockaddr *)&net->ro._l_addr;
5447 if (sa->sa_family != sa_touse->sa_family) {
5451 if (sa->sa_family == AF_INET) {
5452 sa4 = (struct sockaddr_in *)sa;
5453 if (sa4->sin_addr.s_addr ==
5454 sin4.sin_addr.s_addr) {
5461 if (sa->sa_family == AF_INET6) {
5462 sa6 = (struct sockaddr_in6 *)sa;
5463 if (SCTP6_ARE_ADDR_EQUAL(
5472 /* New addr added! no need to look further */
5476 offset += SCTP_SIZE32(plen);
5477 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5483 * Given a MBUF chain that was sent into us containing an INIT. Build a
5484 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5485 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5486 * message (i.e. the struct sctp_init_msg).
5489 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5490 struct sctp_nets *src_net, struct mbuf *init_pkt,
5491 int iphlen, int offset,
5492 struct sockaddr *src, struct sockaddr *dst,
5493 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5494 uint8_t mflowtype, uint32_t mflowid,
5495 uint32_t vrf_id, uint16_t port)
5497 struct sctp_association *asoc;
5498 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5499 struct sctp_init_ack_chunk *initack;
5500 struct sctp_adaptation_layer_indication *ali;
5501 struct sctp_supported_chunk_types_param *pr_supported;
5502 struct sctp_paramhdr *ph;
5503 union sctp_sockstore *over_addr;
5504 struct sctp_scoping scp;
5507 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5508 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5509 struct sockaddr_in *sin;
5512 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5513 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5514 struct sockaddr_in6 *sin6;
5516 struct sockaddr *to;
5517 struct sctp_state_cookie stc;
5518 struct sctp_nets *net = NULL;
5519 uint8_t *signature = NULL;
5520 int cnt_inits_to = 0;
5521 uint16_t his_limit, i_want;
5523 int nat_friendly = 0;
5526 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5533 if ((asoc != NULL) &&
5534 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5535 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5537 * new addresses, out of here in non-cookie-wait
5540 * Send an ABORT, without the new address error
5541 * cause. This looks no different than if no
5542 * listener was present.
5544 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5546 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5547 mflowtype, mflowid, inp->fibnum,
5551 if (src_net != NULL && (src_net->port != port)) {
5553 * change of remote encapsulation port, out of here
5554 * in non-cookie-wait states
5556 * Send an ABORT, without an specific error cause.
5557 * This looks no different than if no listener was
5560 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5561 "Remote encapsulation port changed");
5562 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5563 mflowtype, mflowid, inp->fibnum,
5569 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5570 (offset + sizeof(struct sctp_init_chunk)),
5571 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5574 if (op_err == NULL) {
5575 char msg[SCTP_DIAG_INFO_LEN];
5577 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5578 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5581 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5582 init_chk->init.initiate_tag, op_err,
5583 mflowtype, mflowid, inp->fibnum,
5587 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5589 /* No memory, INIT timer will re-attempt. */
5590 sctp_m_freem(op_err);
5593 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5597 * We might not overwrite the identification[] completely and on
5598 * some platforms time_entered will contain some padding. Therefore
5599 * zero out the cookie to avoid putting uninitialized memory on the
5602 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5604 /* the time I built cookie */
5605 (void)SCTP_GETTIME_TIMEVAL(&now);
5606 stc.time_entered.tv_sec = now.tv_sec;
5607 stc.time_entered.tv_usec = now.tv_usec;
5609 /* populate any tie tags */
5611 /* unlock before tag selections */
5612 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5613 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5614 stc.cookie_life = asoc->cookie_life;
5615 net = asoc->primary_destination;
5617 stc.tie_tag_my_vtag = 0;
5618 stc.tie_tag_peer_vtag = 0;
5619 /* life I will award this cookie */
5620 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5623 /* copy in the ports for later check */
5624 stc.myport = sh->dest_port;
5625 stc.peerport = sh->src_port;
5628 * If we wanted to honor cookie life extensions, we would add to
5629 * stc.cookie_life. For now we should NOT honor any extension
5631 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5632 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5633 stc.ipv6_addr_legal = 1;
5634 if (SCTP_IPV6_V6ONLY(inp)) {
5635 stc.ipv4_addr_legal = 0;
5637 stc.ipv4_addr_legal = 1;
5640 stc.ipv6_addr_legal = 0;
5641 stc.ipv4_addr_legal = 1;
5646 switch (dst->sa_family) {
5650 /* lookup address */
5651 stc.address[0] = src4->sin_addr.s_addr;
5655 stc.addr_type = SCTP_IPV4_ADDRESS;
5656 /* local from address */
5657 stc.laddress[0] = dst4->sin_addr.s_addr;
5658 stc.laddress[1] = 0;
5659 stc.laddress[2] = 0;
5660 stc.laddress[3] = 0;
5661 stc.laddr_type = SCTP_IPV4_ADDRESS;
5662 /* scope_id is only for v6 */
5664 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5665 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5668 /* Must use the address in this case */
5669 if (sctp_is_address_on_local_host(src, vrf_id)) {
5670 stc.loopback_scope = 1;
5673 stc.local_scope = 0;
5681 stc.addr_type = SCTP_IPV6_ADDRESS;
5682 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5683 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5684 if (sctp_is_address_on_local_host(src, vrf_id)) {
5685 stc.loopback_scope = 1;
5686 stc.local_scope = 0;
5689 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5690 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5692 * If the new destination or source
5693 * is a LINK_LOCAL we must have
5694 * common both site and local scope.
5695 * Don't set local scope though
5696 * since we must depend on the
5697 * source to be added implicitly. We
5698 * cannot assure just because we
5699 * share one link that all links are
5702 stc.local_scope = 0;
5706 * we start counting for the private
5707 * address stuff at 1. since the
5708 * link local we source from won't
5709 * show up in our scoped count.
5713 * pull out the scope_id from
5716 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5717 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5719 * If the new destination or source
5720 * is SITE_LOCAL then we must have
5721 * site scope in common.
5725 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5726 stc.laddr_type = SCTP_IPV6_ADDRESS;
5736 /* set the scope per the existing tcb */
5739 struct sctp_nets *lnet;
5742 stc.loopback_scope = asoc->scope.loopback_scope;
5743 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5744 stc.site_scope = asoc->scope.site_scope;
5745 stc.local_scope = asoc->scope.local_scope;
5747 /* Why do we not consider IPv4 LL addresses? */
5748 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5749 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5750 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5752 * if we have a LL address, start
5760 /* use the net pointer */
5761 to = (struct sockaddr *)&net->ro._l_addr;
5762 switch (to->sa_family) {
5765 sin = (struct sockaddr_in *)to;
5766 stc.address[0] = sin->sin_addr.s_addr;
5770 stc.addr_type = SCTP_IPV4_ADDRESS;
5771 if (net->src_addr_selected == 0) {
5773 * strange case here, the INIT should have
5774 * did the selection.
5776 net->ro._s_addr = sctp_source_address_selection(inp,
5777 stcb, (sctp_route_t *)&net->ro,
5779 if (net->ro._s_addr == NULL) {
5780 sctp_m_freem(op_err);
5785 net->src_addr_selected = 1;
5788 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5789 stc.laddress[1] = 0;
5790 stc.laddress[2] = 0;
5791 stc.laddress[3] = 0;
5792 stc.laddr_type = SCTP_IPV4_ADDRESS;
5793 /* scope_id is only for v6 */
5799 sin6 = (struct sockaddr_in6 *)to;
5800 memcpy(&stc.address, &sin6->sin6_addr,
5801 sizeof(struct in6_addr));
5802 stc.addr_type = SCTP_IPV6_ADDRESS;
5803 stc.scope_id = sin6->sin6_scope_id;
5804 if (net->src_addr_selected == 0) {
5806 * strange case here, the INIT should have
5807 * done the selection.
5809 net->ro._s_addr = sctp_source_address_selection(inp,
5810 stcb, (sctp_route_t *)&net->ro,
5812 if (net->ro._s_addr == NULL) {
5813 sctp_m_freem(op_err);
5818 net->src_addr_selected = 1;
5820 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5821 sizeof(struct in6_addr));
5822 stc.laddr_type = SCTP_IPV6_ADDRESS;
5827 /* Now lets put the SCTP header in place */
5828 initack = mtod(m, struct sctp_init_ack_chunk *);
5829 /* Save it off for quick ref */
5830 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5832 memcpy(stc.identification, SCTP_VERSION_STRING,
5833 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5834 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5835 /* now the chunk header */
5836 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5837 initack->ch.chunk_flags = 0;
5838 /* fill in later from mbuf we build */
5839 initack->ch.chunk_length = 0;
5840 /* place in my tag */
5841 if ((asoc != NULL) &&
5842 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5843 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5844 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5845 /* re-use the v-tags and init-seq here */
5846 initack->init.initiate_tag = htonl(asoc->my_vtag);
5847 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5849 uint32_t vtag, itsn;
5852 atomic_add_int(&asoc->refcnt, 1);
5853 SCTP_TCB_UNLOCK(stcb);
5855 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5856 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5858 * Got a duplicate vtag on some guy behind a
5859 * nat make sure we don't use it.
5863 initack->init.initiate_tag = htonl(vtag);
5864 /* get a TSN to use too */
5865 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5866 initack->init.initial_tsn = htonl(itsn);
5867 SCTP_TCB_LOCK(stcb);
5868 atomic_add_int(&asoc->refcnt, -1);
5870 SCTP_INP_INCR_REF(inp);
5871 SCTP_INP_RUNLOCK(inp);
5872 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5873 initack->init.initiate_tag = htonl(vtag);
5874 /* get a TSN to use too */
5875 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5876 SCTP_INP_RLOCK(inp);
5877 SCTP_INP_DECR_REF(inp);
5880 /* save away my tag to */
5881 stc.my_vtag = initack->init.initiate_tag;
5883 /* set up some of the credits. */
5884 so = inp->sctp_socket;
5886 /* memory problem */
5887 sctp_m_freem(op_err);
5891 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5893 /* set what I want */
5894 his_limit = ntohs(init_chk->init.num_inbound_streams);
5895 /* choose what I want */
5897 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5898 i_want = asoc->streamoutcnt;
5900 i_want = asoc->pre_open_streams;
5903 i_want = inp->sctp_ep.pre_open_stream_count;
5905 if (his_limit < i_want) {
5906 /* I Want more :< */
5907 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5909 /* I can have what I want :> */
5910 initack->init.num_outbound_streams = htons(i_want);
5912 /* tell him his limit. */
5913 initack->init.num_inbound_streams =
5914 htons(inp->sctp_ep.max_open_streams_intome);
5916 /* adaptation layer indication parameter */
5917 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5918 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5919 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5920 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5921 ali->ph.param_length = htons(parameter_len);
5922 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5923 chunk_len += parameter_len;
5927 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5928 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5929 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5930 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5931 ph->param_type = htons(SCTP_ECN_CAPABLE);
5932 ph->param_length = htons(parameter_len);
5933 chunk_len += parameter_len;
5936 /* PR-SCTP supported parameter */
5937 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5938 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5939 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5940 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5941 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5942 ph->param_length = htons(parameter_len);
5943 chunk_len += parameter_len;
5946 /* Add NAT friendly parameter */
5948 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5949 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5950 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5951 ph->param_length = htons(parameter_len);
5952 chunk_len += parameter_len;
5955 /* And now tell the peer which extensions we support */
5957 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5958 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5959 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5960 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5961 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5962 ((asoc == NULL) && (inp->idata_supported == 1))) {
5963 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5966 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5967 ((asoc == NULL) && (inp->auth_supported == 1))) {
5968 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5970 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5971 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5972 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5973 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5975 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5976 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5977 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5979 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5980 ((asoc == NULL) && (inp->idata_supported == 1))) {
5981 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5983 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5984 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5985 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5987 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5988 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5989 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5992 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5993 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5994 pr_supported->ph.param_length = htons(parameter_len);
5995 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5996 chunk_len += parameter_len;
5999 /* add authentication parameters */
6000 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
6001 ((asoc == NULL) && (inp->auth_supported == 1))) {
6002 struct sctp_auth_random *randp;
6003 struct sctp_auth_hmac_algo *hmacs;
6004 struct sctp_auth_chunk_list *chunks;
6006 if (padding_len > 0) {
6007 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6008 chunk_len += padding_len;
6011 /* generate and add RANDOM parameter */
6012 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6013 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
6014 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6015 randp->ph.param_type = htons(SCTP_RANDOM);
6016 randp->ph.param_length = htons(parameter_len);
6017 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6018 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6019 chunk_len += parameter_len;
6021 if (padding_len > 0) {
6022 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6023 chunk_len += padding_len;
6026 /* add HMAC_ALGO parameter */
6027 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6028 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6029 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6030 (uint8_t *)hmacs->hmac_ids);
6031 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6032 hmacs->ph.param_length = htons(parameter_len);
6033 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6034 chunk_len += parameter_len;
6036 if (padding_len > 0) {
6037 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6038 chunk_len += padding_len;
6041 /* add CHUNKS parameter */
6042 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6043 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6044 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6045 chunks->chunk_types);
6046 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6047 chunks->ph.param_length = htons(parameter_len);
6048 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6049 chunk_len += parameter_len;
6051 SCTP_BUF_LEN(m) = chunk_len;
6053 /* now the addresses */
6055 * To optimize this we could put the scoping stuff into a structure
6056 * and remove the individual uint8's from the stc structure. Then we
6057 * could just sifa in the address within the stc.. but for now this
6058 * is a quick hack to get the address stuff teased apart.
6060 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6061 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6062 scp.loopback_scope = stc.loopback_scope;
6063 scp.ipv4_local_scope = stc.ipv4_scope;
6064 scp.local_scope = stc.local_scope;
6065 scp.site_scope = stc.site_scope;
6066 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6068 &padding_len, &chunk_len);
6069 /* padding_len can only be positive, if no addresses have been added */
6070 if (padding_len > 0) {
6071 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6072 chunk_len += padding_len;
6073 SCTP_BUF_LEN(m) += padding_len;
6077 /* tack on the operational error if present */
6080 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6081 parameter_len += SCTP_BUF_LEN(m_tmp);
6083 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6084 SCTP_BUF_NEXT(m_last) = op_err;
6085 while (SCTP_BUF_NEXT(m_last) != NULL) {
6086 m_last = SCTP_BUF_NEXT(m_last);
6088 chunk_len += parameter_len;
6090 if (padding_len > 0) {
6091 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6092 if (m_last == NULL) {
6093 /* Houston we have a problem, no space */
6097 chunk_len += padding_len;
6100 /* Now we must build a cookie */
6101 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6102 if (m_cookie == NULL) {
6103 /* memory problem */
6107 /* Now append the cookie to the end and update the space/size */
6108 SCTP_BUF_NEXT(m_last) = m_cookie;
6110 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6111 parameter_len += SCTP_BUF_LEN(m_tmp);
6112 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6116 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6117 chunk_len += parameter_len;
6120 * Place in the size, but we don't include the last pad (if any) in
6123 initack->ch.chunk_length = htons(chunk_len);
6126 * Time to sign the cookie, we don't sign over the cookie signature
6127 * though thus we set trailer.
6129 (void)sctp_hmac_m(SCTP_HMAC,
6130 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6131 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6132 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6134 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6135 * here since the timer will drive a retranmission.
6137 if (padding_len > 0) {
6138 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6143 if (stc.loopback_scope) {
6144 over_addr = (union sctp_sockstore *)dst;
6149 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6151 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6154 SCTP_SO_NOT_LOCKED))) {
6155 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6156 if (error == ENOBUFS) {
6158 asoc->ifp_had_enobuf = 1;
6160 SCTP_STAT_INCR(sctps_lowlevelerr);
6164 asoc->ifp_had_enobuf = 0;
6167 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6172 sctp_prune_prsctp(struct sctp_tcb *stcb,
6173 struct sctp_association *asoc,
6174 struct sctp_sndrcvinfo *srcv,
6178 struct sctp_tmit_chunk *chk, *nchk;
6180 SCTP_TCB_LOCK_ASSERT(stcb);
6181 if ((asoc->prsctp_supported) &&
6182 (asoc->sent_queue_cnt_removeable > 0)) {
6183 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6185 * Look for chunks marked with the PR_SCTP flag AND
6186 * the buffer space flag. If the one being sent is
6187 * equal or greater priority then purge the old one
6188 * and free some space.
6190 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6192 * This one is PR-SCTP AND buffer space
6195 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6197 * Lower numbers equates to higher
6198 * priority so if the one we are
6199 * looking at has a larger or equal
6200 * priority we want to drop the data
6201 * and NOT retransmit it.
6205 * We release the book_size
6206 * if the mbuf is here
6211 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6215 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6218 freed_spc += ret_spc;
6219 if (freed_spc >= dataout) {
6222 } /* if chunk was present */
6223 } /* if of sufficient priority */
6224 } /* if chunk has enabled */
6225 } /* tailqforeach */
6227 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6228 /* Here we must move to the sent queue and mark */
6229 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6230 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6233 * We release the book_size
6234 * if the mbuf is here
6238 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6241 freed_spc += ret_spc;
6242 if (freed_spc >= dataout) {
6245 } /* end if chk->data */
6246 } /* end if right class */
6247 } /* end if chk pr-sctp */
6248 } /* tailqforeachsafe (chk) */
6249 } /* if enabled in asoc */
6253 sctp_get_frag_point(struct sctp_tcb *stcb,
6254 struct sctp_association *asoc)
6259 * For endpoints that have both v6 and v4 addresses we must reserve
6260 * room for the ipv6 header, for those that are only dealing with V4
6261 * we use a larger frag point.
6263 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6264 ovh = SCTP_MIN_OVERHEAD;
6266 ovh = SCTP_MIN_V4_OVERHEAD;
6268 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6269 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6270 siz = asoc->smallest_mtu - ovh;
6272 siz = (stcb->asoc.sctp_frag_point - ovh);
6274 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6276 /* A data chunk MUST fit in a cluster */
6277 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6280 /* adjust for an AUTH chunk if DATA requires auth */
6281 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6282 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6285 /* make it an even word boundary please */
6292 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6295 * We assume that the user wants PR_SCTP_TTL if the user provides a
6296 * positive lifetime but does not specify any PR_SCTP policy.
6298 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6299 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6300 } else if (sp->timetolive > 0) {
6301 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6302 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6306 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6307 case CHUNK_FLAGS_PR_SCTP_BUF:
6309 * Time to live is a priority stored in tv_sec when doing
6310 * the buffer drop thing.
6312 sp->ts.tv_sec = sp->timetolive;
6315 case CHUNK_FLAGS_PR_SCTP_TTL:
6319 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6320 tv.tv_sec = sp->timetolive / 1000;
6321 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6323 * TODO sctp_constants.h needs alternative time
6324 * macros when _KERNEL is undefined.
6326 timevaladd(&sp->ts, &tv);
6329 case CHUNK_FLAGS_PR_SCTP_RTX:
6331 * Time to live is a the number or retransmissions stored in
6334 sp->ts.tv_sec = sp->timetolive;
6338 SCTPDBG(SCTP_DEBUG_USRREQ1,
6339 "Unknown PR_SCTP policy %u.\n",
6340 PR_SCTP_POLICY(sp->sinfo_flags));
6346 sctp_msg_append(struct sctp_tcb *stcb,
6347 struct sctp_nets *net,
6349 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6353 struct sctp_stream_queue_pending *sp = NULL;
6354 struct sctp_stream_out *strm;
6357 * Given an mbuf chain, put it into the association send queue and
6358 * place it on the wheel
6360 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6361 /* Invalid stream number */
6362 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6366 if ((stcb->asoc.stream_locked) &&
6367 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6368 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6372 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6373 /* Now can we send this? */
6374 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6375 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6376 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6377 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6378 /* got data while shutting down */
6379 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6383 sctp_alloc_a_strmoq(stcb, sp);
6385 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6389 sp->sinfo_flags = srcv->sinfo_flags;
6390 sp->timetolive = srcv->sinfo_timetolive;
6391 sp->ppid = srcv->sinfo_ppid;
6392 sp->context = srcv->sinfo_context;
6394 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6396 atomic_add_int(&sp->net->ref_count, 1);
6400 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6401 sp->sid = srcv->sinfo_stream;
6402 sp->msg_is_complete = 1;
6403 sp->sender_all_done = 1;
6406 sp->tail_mbuf = NULL;
6407 sctp_set_prsctp_policy(sp);
6409 * We could in theory (for sendall) sifa the length in, but we would
6410 * still have to hunt through the chain since we need to setup the
6414 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6415 if (SCTP_BUF_NEXT(at) == NULL)
6417 sp->length += SCTP_BUF_LEN(at);
6419 if (srcv->sinfo_keynumber_valid) {
6420 sp->auth_keyid = srcv->sinfo_keynumber;
6422 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6424 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6425 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6426 sp->holds_key_ref = 1;
6428 if (hold_stcb_lock == 0) {
6429 SCTP_TCB_SEND_LOCK(stcb);
6431 sctp_snd_sb_alloc(stcb, sp->length);
6432 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6433 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6434 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6436 if (hold_stcb_lock == 0) {
6437 SCTP_TCB_SEND_UNLOCK(stcb);
6447 static struct mbuf *
6448 sctp_copy_mbufchain(struct mbuf *clonechain,
6449 struct mbuf *outchain,
6450 struct mbuf **endofchain,
6453 uint8_t copy_by_ref)
6456 struct mbuf *appendchain;
6460 if (endofchain == NULL) {
6464 sctp_m_freem(outchain);
6467 if (can_take_mbuf) {
6468 appendchain = clonechain;
6471 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6473 /* Its not in a cluster */
6474 if (*endofchain == NULL) {
6475 /* lets get a mbuf cluster */
6476 if (outchain == NULL) {
6477 /* This is the general case */
6479 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6480 if (outchain == NULL) {
6483 SCTP_BUF_LEN(outchain) = 0;
6484 *endofchain = outchain;
6485 /* get the prepend space */
6486 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6489 * We really should not get a NULL
6495 if (SCTP_BUF_NEXT(m) == NULL) {
6499 m = SCTP_BUF_NEXT(m);
6502 if (*endofchain == NULL) {
6504 * huh, TSNH XXX maybe we
6507 sctp_m_freem(outchain);
6511 /* get the new end of length */
6512 len = (int)M_TRAILINGSPACE(*endofchain);
6514 /* how much is left at the end? */
6515 len = (int)M_TRAILINGSPACE(*endofchain);
6517 /* Find the end of the data, for appending */
6518 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6520 /* Now lets copy it out */
6521 if (len >= sizeofcpy) {
6522 /* It all fits, copy it in */
6523 m_copydata(clonechain, 0, sizeofcpy, cp);
6524 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6526 /* fill up the end of the chain */
6528 m_copydata(clonechain, 0, len, cp);
6529 SCTP_BUF_LEN((*endofchain)) += len;
6530 /* now we need another one */
6533 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6538 SCTP_BUF_NEXT((*endofchain)) = m;
6540 cp = mtod((*endofchain), caddr_t);
6541 m_copydata(clonechain, len, sizeofcpy, cp);
6542 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6546 /* copy the old fashion way */
6547 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6548 #ifdef SCTP_MBUF_LOGGING
6549 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6550 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6555 if (appendchain == NULL) {
6558 sctp_m_freem(outchain);
6562 /* tack on to the end */
6563 if (*endofchain != NULL) {
6564 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6568 if (SCTP_BUF_NEXT(m) == NULL) {
6569 SCTP_BUF_NEXT(m) = appendchain;
6572 m = SCTP_BUF_NEXT(m);
6576 * save off the end and update the end-chain position
6580 if (SCTP_BUF_NEXT(m) == NULL) {
6584 m = SCTP_BUF_NEXT(m);
6588 /* save off the end and update the end-chain position */
6591 if (SCTP_BUF_NEXT(m) == NULL) {
6595 m = SCTP_BUF_NEXT(m);
6597 return (appendchain);
6602 sctp_med_chunk_output(struct sctp_inpcb *inp,
6603 struct sctp_tcb *stcb,
6604 struct sctp_association *asoc,
6607 int control_only, int from_where,
6608 struct timeval *now, int *now_filled, int frag_point, int so_locked
6609 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6615 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6616 uint32_t val SCTP_UNUSED)
6618 struct sctp_copy_all *ca;
6621 int added_control = 0;
6622 int un_sent, do_chunk_output = 1;
6623 struct sctp_association *asoc;
6624 struct sctp_nets *net;
6626 ca = (struct sctp_copy_all *)ptr;
6627 if (ca->m == NULL) {
6630 if (ca->inp != inp) {
6634 if (ca->sndlen > 0) {
6635 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6637 /* can't copy so we are done */
6641 #ifdef SCTP_MBUF_LOGGING
6642 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6643 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6649 SCTP_TCB_LOCK_ASSERT(stcb);
6650 if (stcb->asoc.alternate) {
6651 net = stcb->asoc.alternate;
6653 net = stcb->asoc.primary_destination;
6655 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6656 /* Abort this assoc with m as the user defined reason */
6658 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6660 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6661 0, M_NOWAIT, 1, MT_DATA);
6662 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6665 struct sctp_paramhdr *ph;
6667 ph = mtod(m, struct sctp_paramhdr *);
6668 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6669 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6672 * We add one here to keep the assoc from dis-appearing on
6675 atomic_add_int(&stcb->asoc.refcnt, 1);
6676 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6678 * sctp_abort_an_association calls sctp_free_asoc() free
6679 * association will NOT free it since we incremented the
6680 * refcnt .. we do this to prevent it being freed and things
6681 * getting tricky since we could end up (from free_asoc)
6682 * calling inpcb_free which would get a recursive lock call
6683 * to the iterator lock.. But as a consequence of that the
6684 * stcb will return to us un-locked.. since free_asoc
6685 * returns with either no TCB or the TCB unlocked, we must
6686 * relock.. to unlock in the iterator timer :-0
6688 SCTP_TCB_LOCK(stcb);
6689 atomic_add_int(&stcb->asoc.refcnt, -1);
6690 goto no_chunk_output;
6693 ret = sctp_msg_append(stcb, net, m,
6697 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6698 /* shutdown this assoc */
6699 if (TAILQ_EMPTY(&asoc->send_queue) &&
6700 TAILQ_EMPTY(&asoc->sent_queue) &&
6701 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6702 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6706 * there is nothing queued to send, so I'm
6709 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6710 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6711 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6713 * only send SHUTDOWN the first time
6716 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6717 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6719 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6720 sctp_stop_timers_for_shutdown(stcb);
6721 sctp_send_shutdown(stcb, net);
6722 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6724 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6725 asoc->primary_destination);
6727 do_chunk_output = 0;
6731 * we still got (or just got) data to send,
6732 * so set SHUTDOWN_PENDING
6735 * XXX sockets draft says that SCTP_EOF
6736 * should be sent with no data. currently,
6737 * we will allow user data to be sent first
6738 * and move to SHUTDOWN-PENDING
6740 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6741 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6742 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6743 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6744 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6746 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6747 if (TAILQ_EMPTY(&asoc->send_queue) &&
6748 TAILQ_EMPTY(&asoc->sent_queue) &&
6749 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6750 struct mbuf *op_err;
6751 char msg[SCTP_DIAG_INFO_LEN];
6754 snprintf(msg, sizeof(msg),
6755 "%s:%d at %s", __FILE__, __LINE__, __func__);
6756 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6758 atomic_add_int(&stcb->asoc.refcnt, 1);
6759 sctp_abort_an_association(stcb->sctp_ep, stcb,
6760 op_err, SCTP_SO_NOT_LOCKED);
6761 atomic_add_int(&stcb->asoc.refcnt, -1);
6762 goto no_chunk_output;
6764 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6765 asoc->primary_destination);
6771 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6772 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6774 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6775 (stcb->asoc.total_flight > 0) &&
6776 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6777 do_chunk_output = 0;
6779 if (do_chunk_output)
6780 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6781 else if (added_control) {
6782 int num_out, reason, now_filled = 0;
6786 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6787 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6788 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6799 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6801 struct sctp_copy_all *ca;
6803 ca = (struct sctp_copy_all *)ptr;
6805 * Do a notify here? Kacheong suggests that the notify be done at
6806 * the send time.. so you would push up a notification if any send
6807 * failed. Don't know if this is feasible since the only failures we
6808 * have is "memory" related and if you cannot get an mbuf to send
6809 * the data you surely can't get an mbuf to send up to notify the
6810 * user you can't send the data :->
6813 /* now free everything */
6815 /* Lets clear the flag to allow others to run. */
6816 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6818 sctp_m_freem(ca->m);
6819 SCTP_FREE(ca, SCTP_M_COPYAL);
6822 static struct mbuf *
6823 sctp_copy_out_all(struct uio *uio, ssize_t len)
6825 struct mbuf *ret, *at;
6826 ssize_t left, willcpy, cancpy, error;
6828 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6834 SCTP_BUF_LEN(ret) = 0;
6835 /* save space for the data chunk header */
6836 cancpy = (int)M_TRAILINGSPACE(ret);
6837 willcpy = min(cancpy, left);
6840 /* Align data to the end */
6841 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6847 SCTP_BUF_LEN(at) = (int)willcpy;
6848 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6851 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6852 if (SCTP_BUF_NEXT(at) == NULL) {
6855 at = SCTP_BUF_NEXT(at);
6856 SCTP_BUF_LEN(at) = 0;
6857 cancpy = (int)M_TRAILINGSPACE(at);
6858 willcpy = min(cancpy, left);
6865 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6866 struct sctp_sndrcvinfo *srcv)
6869 struct sctp_copy_all *ca;
6871 if (inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) {
6872 /* There is another. */
6875 if (uio->uio_resid > SCTP_MAX_SENDALL_LIMIT) {
6876 /* You must be less than the max! */
6879 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6886 memset(ca, 0, sizeof(struct sctp_copy_all));
6890 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6893 * take off the sendall flag, it would be bad if we failed to do
6896 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6897 /* get length and mbuf chain */
6899 ca->sndlen = uio->uio_resid;
6900 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6901 if (ca->m == NULL) {
6902 SCTP_FREE(ca, SCTP_M_COPYAL);
6903 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6907 /* Gather the length of the send */
6911 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6912 ca->sndlen += SCTP_BUF_LEN(mat);
6915 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6916 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6917 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6918 SCTP_ASOC_ANY_STATE,
6920 sctp_sendall_completes, inp, 1);
6922 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6923 SCTP_FREE(ca, SCTP_M_COPYAL);
6924 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6932 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6934 struct sctp_tmit_chunk *chk, *nchk;
6936 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6937 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6938 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6939 asoc->ctrl_queue_cnt--;
6941 sctp_m_freem(chk->data);
6944 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6950 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6952 struct sctp_association *asoc;
6953 struct sctp_tmit_chunk *chk, *nchk;
6954 struct sctp_asconf_chunk *acp;
6957 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6958 /* find SCTP_ASCONF chunk in queue */
6959 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6961 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6962 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6967 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6968 asoc->ctrl_queue_cnt--;
6970 sctp_m_freem(chk->data);
6973 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6980 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6981 struct sctp_association *asoc,
6982 struct sctp_tmit_chunk **data_list,
6984 struct sctp_nets *net)
6987 struct sctp_tmit_chunk *tp1;
6989 for (i = 0; i < bundle_at; i++) {
6990 /* off of the send queue */
6991 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6992 asoc->send_queue_cnt--;
6995 * Any chunk NOT 0 you zap the time chunk 0 gets
6996 * zapped or set based on if a RTO measurment is
6999 data_list[i]->do_rtt = 0;
7002 data_list[i]->sent_rcv_time = net->last_sent_time;
7003 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
7004 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
7005 if (data_list[i]->whoTo == NULL) {
7006 data_list[i]->whoTo = net;
7007 atomic_add_int(&net->ref_count, 1);
7009 /* on to the sent queue */
7010 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
7011 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7012 struct sctp_tmit_chunk *tpp;
7014 /* need to move back */
7016 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
7018 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7022 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7025 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7027 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7032 /* This does not lower until the cum-ack passes it */
7033 asoc->sent_queue_cnt++;
7034 if ((asoc->peers_rwnd <= 0) &&
7035 (asoc->total_flight == 0) &&
7037 /* Mark the chunk as being a window probe */
7038 SCTP_STAT_INCR(sctps_windowprobed);
7040 #ifdef SCTP_AUDITING_ENABLED
7041 sctp_audit_log(0xC2, 3);
7043 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7044 data_list[i]->snd_count = 1;
7045 data_list[i]->rec.data.chunk_was_revoked = 0;
7046 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7047 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7048 data_list[i]->whoTo->flight_size,
7049 data_list[i]->book_size,
7050 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7051 data_list[i]->rec.data.tsn);
7053 sctp_flight_size_increase(data_list[i]);
7054 sctp_total_flight_increase(stcb, data_list[i]);
7055 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7056 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7057 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7059 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7060 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7061 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7062 /* SWS sender side engages */
7063 asoc->peers_rwnd = 0;
7066 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7067 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7072 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7073 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7078 struct sctp_tmit_chunk *chk, *nchk;
7080 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7081 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7082 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7083 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7084 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7085 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7086 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7087 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7088 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7089 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7090 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7091 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7092 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7093 /* Stray chunks must be cleaned up */
7095 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7096 asoc->ctrl_queue_cnt--;
7098 sctp_m_freem(chk->data);
7101 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7102 asoc->fwd_tsn_cnt--;
7104 sctp_free_a_chunk(stcb, chk, so_locked);
7105 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7106 /* special handling, we must look into the param */
7107 if (chk != asoc->str_reset) {
7108 goto clean_up_anyway;
7115 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7116 uint32_t space_left, uint32_t frag_point, int eeor_on)
7119 * Make a decision on if I should split a msg into multiple parts.
7120 * This is only asked of incomplete messages.
7124 * If we are doing EEOR we need to always send it if its the
7125 * entire thing, since it might be all the guy is putting in
7128 if (space_left >= length) {
7130 * If we have data outstanding,
7131 * we get another chance when the sack
7132 * arrives to transmit - wait for more data
7134 if (stcb->asoc.total_flight == 0) {
7136 * If nothing is in flight, we zero the
7144 /* You can fill the rest */
7145 return (space_left);
7149 * For those strange folk that make the send buffer
7150 * smaller than our fragmentation point, we can't
7151 * get a full msg in so we have to allow splitting.
7153 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7156 if ((length <= space_left) ||
7157 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7158 /* Sub-optimial residual don't split in non-eeor mode. */
7162 * If we reach here length is larger than the space_left. Do we wish
7163 * to split it for the sake of packet putting together?
7165 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7166 /* Its ok to split it */
7167 return (min(space_left, frag_point));
7169 /* Nope, can't split */
7174 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7175 struct sctp_stream_out *strq,
7176 uint32_t space_left,
7177 uint32_t frag_point,
7182 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7187 /* Move from the stream to the send_queue keeping track of the total */
7188 struct sctp_association *asoc;
7189 struct sctp_stream_queue_pending *sp;
7190 struct sctp_tmit_chunk *chk;
7191 struct sctp_data_chunk *dchkh = NULL;
7192 struct sctp_idata_chunk *ndchkh = NULL;
7193 uint32_t to_move, length;
7195 uint8_t rcv_flags = 0;
7197 uint8_t send_lock_up = 0;
7199 SCTP_TCB_LOCK_ASSERT(stcb);
7202 /* sa_ignore FREED_MEMORY */
7203 sp = TAILQ_FIRST(&strq->outqueue);
7205 if (send_lock_up == 0) {
7206 SCTP_TCB_SEND_LOCK(stcb);
7209 sp = TAILQ_FIRST(&strq->outqueue);
7213 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7214 (stcb->asoc.idata_supported == 0) &&
7215 (strq->last_msg_incomplete)) {
7216 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7218 strq->last_msg_incomplete);
7219 strq->last_msg_incomplete = 0;
7223 SCTP_TCB_SEND_UNLOCK(stcb);
7228 if ((sp->msg_is_complete) && (sp->length == 0)) {
7229 if (sp->sender_all_done) {
7231 * We are doing deferred cleanup. Last time through
7232 * when we took all the data the sender_all_done was
7235 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7236 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7237 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7238 sp->sender_all_done,
7240 sp->msg_is_complete,
7244 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7245 SCTP_TCB_SEND_LOCK(stcb);
7248 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7249 TAILQ_REMOVE(&strq->outqueue, sp, next);
7250 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7251 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7252 (strq->chunks_on_queues == 0) &&
7253 TAILQ_EMPTY(&strq->outqueue)) {
7254 stcb->asoc.trigger_reset = 1;
7257 sctp_free_remote_addr(sp->net);
7261 sctp_m_freem(sp->data);
7264 sctp_free_a_strmoq(stcb, sp, so_locked);
7265 /* we can't be locked to it */
7267 SCTP_TCB_SEND_UNLOCK(stcb);
7270 /* back to get the next msg */
7274 * sender just finished this but still holds a
7282 /* is there some to get */
7283 if (sp->length == 0) {
7288 } else if (sp->discard_rest) {
7289 if (send_lock_up == 0) {
7290 SCTP_TCB_SEND_LOCK(stcb);
7293 /* Whack down the size */
7294 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7295 if ((stcb->sctp_socket != NULL) &&
7296 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7297 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7298 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7301 sctp_m_freem(sp->data);
7303 sp->tail_mbuf = NULL;
7312 some_taken = sp->some_taken;
7314 length = sp->length;
7315 if (sp->msg_is_complete) {
7316 /* The message is complete */
7317 to_move = min(length, frag_point);
7318 if (to_move == length) {
7319 /* All of it fits in the MTU */
7320 if (sp->some_taken) {
7321 rcv_flags |= SCTP_DATA_LAST_FRAG;
7323 rcv_flags |= SCTP_DATA_NOT_FRAG;
7325 sp->put_last_out = 1;
7326 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7327 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7330 /* Not all of it fits, we fragment */
7331 if (sp->some_taken == 0) {
7332 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7337 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7340 * We use a snapshot of length in case it
7341 * is expanding during the compare.
7346 if (to_move >= llen) {
7348 if (send_lock_up == 0) {
7350 * We are taking all of an incomplete msg
7351 * thus we need a send lock.
7353 SCTP_TCB_SEND_LOCK(stcb);
7355 if (sp->msg_is_complete) {
7357 * the sender finished the
7364 if (sp->some_taken == 0) {
7365 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7369 /* Nothing to take. */
7376 /* If we reach here, we can copy out a chunk */
7377 sctp_alloc_a_chunk(stcb, chk);
7379 /* No chunk memory */
7385 * Setup for unordered if needed by looking at the user sent info
7388 if (sp->sinfo_flags & SCTP_UNORDERED) {
7389 rcv_flags |= SCTP_DATA_UNORDERED;
7391 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7392 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7393 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7395 /* clear out the chunk before setting up */
7396 memset(chk, 0, sizeof(*chk));
7397 chk->rec.data.rcv_flags = rcv_flags;
7399 if (to_move >= length) {
7400 /* we think we can steal the whole thing */
7401 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7402 SCTP_TCB_SEND_LOCK(stcb);
7405 if (to_move < sp->length) {
7406 /* bail, it changed */
7409 chk->data = sp->data;
7410 chk->last_mbuf = sp->tail_mbuf;
7411 /* register the stealing */
7412 sp->data = sp->tail_mbuf = NULL;
7417 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7418 chk->last_mbuf = NULL;
7419 if (chk->data == NULL) {
7420 sp->some_taken = some_taken;
7421 sctp_free_a_chunk(stcb, chk, so_locked);
7426 #ifdef SCTP_MBUF_LOGGING
7427 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7428 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7431 /* Pull off the data */
7432 m_adj(sp->data, to_move);
7433 /* Now lets work our way down and compact it */
7435 while (m && (SCTP_BUF_LEN(m) == 0)) {
7436 sp->data = SCTP_BUF_NEXT(m);
7437 SCTP_BUF_NEXT(m) = NULL;
7438 if (sp->tail_mbuf == m) {
7440 * Freeing tail? TSNH since
7441 * we supposedly were taking less
7442 * than the sp->length.
7445 panic("Huh, freing tail? - TSNH");
7447 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7448 sp->tail_mbuf = sp->data = NULL;
7457 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7458 chk->copy_by_ref = 1;
7460 chk->copy_by_ref = 0;
7463 * get last_mbuf and counts of mb usage This is ugly but hopefully
7464 * its only one mbuf.
7466 if (chk->last_mbuf == NULL) {
7467 chk->last_mbuf = chk->data;
7468 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7469 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7473 if (to_move > length) {
7474 /*- This should not happen either
7475 * since we always lower to_move to the size
7476 * of sp->length if its larger.
7479 panic("Huh, how can to_move be larger?");
7481 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7485 atomic_subtract_int(&sp->length, to_move);
7487 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7488 if (M_LEADINGSPACE(chk->data) < leading) {
7489 /* Not enough room for a chunk header, get some */
7492 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7495 * we're in trouble here. _PREPEND below will free
7496 * all the data if there is no leading space, so we
7497 * must put the data back and restore.
7499 if (send_lock_up == 0) {
7500 SCTP_TCB_SEND_LOCK(stcb);
7503 if (sp->data == NULL) {
7504 /* unsteal the data */
7505 sp->data = chk->data;
7506 sp->tail_mbuf = chk->last_mbuf;
7510 /* reassemble the data */
7512 sp->data = chk->data;
7513 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7515 sp->some_taken = some_taken;
7516 atomic_add_int(&sp->length, to_move);
7519 sctp_free_a_chunk(stcb, chk, so_locked);
7523 SCTP_BUF_LEN(m) = 0;
7524 SCTP_BUF_NEXT(m) = chk->data;
7526 M_ALIGN(chk->data, 4);
7529 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7530 if (chk->data == NULL) {
7531 /* HELP, TSNH since we assured it would not above? */
7533 panic("prepend failes HELP?");
7535 SCTP_PRINTF("prepend fails HELP?\n");
7536 sctp_free_a_chunk(stcb, chk, so_locked);
7542 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7543 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7544 chk->book_size_scale = 0;
7545 chk->sent = SCTP_DATAGRAM_UNSENT;
7548 chk->asoc = &stcb->asoc;
7549 chk->pad_inplace = 0;
7550 chk->no_fr_allowed = 0;
7551 if (stcb->asoc.idata_supported == 0) {
7552 if (rcv_flags & SCTP_DATA_UNORDERED) {
7553 /* Just use 0. The receiver ignores the values. */
7554 chk->rec.data.mid = 0;
7556 chk->rec.data.mid = strq->next_mid_ordered;
7557 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7558 strq->next_mid_ordered++;
7562 if (rcv_flags & SCTP_DATA_UNORDERED) {
7563 chk->rec.data.mid = strq->next_mid_unordered;
7564 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7565 strq->next_mid_unordered++;
7568 chk->rec.data.mid = strq->next_mid_ordered;
7569 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7570 strq->next_mid_ordered++;
7574 chk->rec.data.sid = sp->sid;
7575 chk->rec.data.ppid = sp->ppid;
7576 chk->rec.data.context = sp->context;
7577 chk->rec.data.doing_fast_retransmit = 0;
7579 chk->rec.data.timetodrop = sp->ts;
7580 chk->flags = sp->act_flags;
7583 chk->whoTo = sp->net;
7584 atomic_add_int(&chk->whoTo->ref_count, 1);
7588 if (sp->holds_key_ref) {
7589 chk->auth_keyid = sp->auth_keyid;
7590 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7591 chk->holds_key_ref = 1;
7593 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7594 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7595 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7596 (uint32_t)(uintptr_t)stcb, sp->length,
7597 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7600 if (stcb->asoc.idata_supported == 0) {
7601 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7603 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7606 * Put the rest of the things in place now. Size was done earlier in
7607 * previous loop prior to padding.
7610 #ifdef SCTP_ASOCLOG_OF_TSNS
7611 SCTP_TCB_LOCK_ASSERT(stcb);
7612 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7613 asoc->tsn_out_at = 0;
7614 asoc->tsn_out_wrapped = 1;
7616 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7617 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7618 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7619 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7620 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7621 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7622 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7623 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7626 if (stcb->asoc.idata_supported == 0) {
7627 dchkh->ch.chunk_type = SCTP_DATA;
7628 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7629 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7630 dchkh->dp.sid = htons(strq->sid);
7631 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7632 dchkh->dp.ppid = chk->rec.data.ppid;
7633 dchkh->ch.chunk_length = htons(chk->send_size);
7635 ndchkh->ch.chunk_type = SCTP_IDATA;
7636 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7637 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7638 ndchkh->dp.sid = htons(strq->sid);
7639 ndchkh->dp.reserved = htons(0);
7640 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7642 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7644 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7646 ndchkh->ch.chunk_length = htons(chk->send_size);
7648 /* Now advance the chk->send_size by the actual pad needed. */
7649 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7654 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7655 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7657 chk->last_mbuf = lm;
7658 chk->pad_inplace = 1;
7660 chk->send_size += pads;
7662 if (PR_SCTP_ENABLED(chk->flags)) {
7663 asoc->pr_sctp_cnt++;
7665 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7666 /* All done pull and kill the message */
7667 if (sp->put_last_out == 0) {
7668 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7669 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7670 sp->sender_all_done,
7672 sp->msg_is_complete,
7676 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7677 SCTP_TCB_SEND_LOCK(stcb);
7680 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7681 TAILQ_REMOVE(&strq->outqueue, sp, next);
7682 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7683 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7684 (strq->chunks_on_queues == 0) &&
7685 TAILQ_EMPTY(&strq->outqueue)) {
7686 stcb->asoc.trigger_reset = 1;
7689 sctp_free_remote_addr(sp->net);
7693 sctp_m_freem(sp->data);
7696 sctp_free_a_strmoq(stcb, sp, so_locked);
7698 asoc->chunks_on_out_queue++;
7699 strq->chunks_on_queues++;
7700 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7701 asoc->send_queue_cnt++;
7704 SCTP_TCB_SEND_UNLOCK(stcb);
7711 sctp_fill_outqueue(struct sctp_tcb *stcb,
7712 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7713 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7718 struct sctp_association *asoc;
7719 struct sctp_stream_out *strq;
7720 uint32_t space_left, moved, total_moved;
7723 SCTP_TCB_LOCK_ASSERT(stcb);
7726 switch (net->ro._l_addr.sa.sa_family) {
7729 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7734 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7739 space_left = net->mtu;
7742 /* Need an allowance for the data chunk header too */
7743 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7745 /* must make even word boundary */
7746 space_left &= 0xfffffffc;
7747 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7750 while ((space_left > 0) && (strq != NULL)) {
7751 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7752 &giveup, eeor_mode, &bail, so_locked);
7753 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7754 if ((giveup != 0) || (bail != 0)) {
7757 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7758 total_moved += moved;
7759 space_left -= moved;
7760 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7761 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7765 space_left &= 0xfffffffc;
7770 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7772 if (total_moved == 0) {
7773 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7774 (net == stcb->asoc.primary_destination)) {
7775 /* ran dry for primary network net */
7776 SCTP_STAT_INCR(sctps_primary_randry);
7777 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7778 /* ran dry with CMT on */
7779 SCTP_STAT_INCR(sctps_cmt_randry);
7785 sctp_fix_ecn_echo(struct sctp_association *asoc)
7787 struct sctp_tmit_chunk *chk;
7789 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7790 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7791 chk->sent = SCTP_DATAGRAM_UNSENT;
7797 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7799 struct sctp_association *asoc;
7800 struct sctp_tmit_chunk *chk;
7801 struct sctp_stream_queue_pending *sp;
7808 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7809 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7810 if (sp->net == net) {
7811 sctp_free_remote_addr(sp->net);
7816 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7817 if (chk->whoTo == net) {
7818 sctp_free_remote_addr(chk->whoTo);
7825 sctp_med_chunk_output(struct sctp_inpcb *inp,
7826 struct sctp_tcb *stcb,
7827 struct sctp_association *asoc,
7830 int control_only, int from_where,
7831 struct timeval *now, int *now_filled, int frag_point, int so_locked
7832 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7838 * Ok this is the generic chunk service queue. we must do the
7840 * - Service the stream queue that is next, moving any
7841 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7842 * LAST to the out queue in one pass) and assigning TSN's. This
7843 * only applys though if the peer does not support NDATA. For NDATA
7844 * chunks its ok to not send the entire message ;-)
7845 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7846 * fomulate and send the low level chunks. Making sure to combine
7847 * any control in the control chunk queue also.
7849 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7850 struct mbuf *outchain, *endoutchain;
7851 struct sctp_tmit_chunk *chk, *nchk;
7853 /* temp arrays for unlinking */
7854 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7855 int no_fragmentflg, error;
7856 unsigned int max_rwnd_per_dest, max_send_per_dest;
7857 int one_chunk, hbflag, skip_data_for_this_net;
7858 int asconf, cookie, no_out_cnt;
7859 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7860 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7862 uint32_t auth_offset = 0;
7863 struct sctp_auth_chunk *auth = NULL;
7864 uint16_t auth_keyid;
7865 int override_ok = 1;
7866 int skip_fill_up = 0;
7867 int data_auth_reqd = 0;
7870 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7877 auth_keyid = stcb->asoc.authinfo.active_keyid;
7878 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7879 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7880 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7885 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7887 * First lets prime the pump. For each destination, if there is room
7888 * in the flight size, attempt to pull an MTU's worth out of the
7889 * stream queues into the general send_queue
7891 #ifdef SCTP_AUDITING_ENABLED
7892 sctp_audit_log(0xC2, 2);
7894 SCTP_TCB_LOCK_ASSERT(stcb);
7901 /* Nothing to possible to send? */
7902 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7903 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7904 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7905 TAILQ_EMPTY(&asoc->send_queue) &&
7906 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7911 if (asoc->peers_rwnd == 0) {
7912 /* No room in peers rwnd */
7914 if (asoc->total_flight > 0) {
7915 /* we are allowed one chunk in flight */
7919 if (stcb->asoc.ecn_echo_cnt_onq) {
7920 /* Record where a sack goes, if any */
7921 if (no_data_chunks &&
7922 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7923 /* Nothing but ECNe to send - we don't do that */
7924 goto nothing_to_send;
7926 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7927 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7928 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7929 sack_goes_to = chk->whoTo;
7934 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7935 if (stcb->sctp_socket)
7936 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7938 max_send_per_dest = 0;
7939 if (no_data_chunks == 0) {
7940 /* How many non-directed chunks are there? */
7941 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7942 if (chk->whoTo == NULL) {
7944 * We already have non-directed chunks on
7945 * the queue, no need to do a fill-up.
7953 if ((no_data_chunks == 0) &&
7954 (skip_fill_up == 0) &&
7955 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7956 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7958 * This for loop we are in takes in each net, if
7959 * its's got space in cwnd and has data sent to it
7960 * (when CMT is off) then it calls
7961 * sctp_fill_outqueue for the net. This gets data on
7962 * the send queue for that network.
7964 * In sctp_fill_outqueue TSN's are assigned and data
7965 * is copied out of the stream buffers. Note mostly
7966 * copy by reference (we hope).
7968 net->window_probe = 0;
7969 if ((net != stcb->asoc.alternate) &&
7970 ((net->dest_state & SCTP_ADDR_PF) ||
7971 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7972 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7974 sctp_log_cwnd(stcb, net, 1,
7975 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7979 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7980 (net->flight_size == 0)) {
7981 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7983 if (net->flight_size >= net->cwnd) {
7984 /* skip this network, no room - can't fill */
7985 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7986 sctp_log_cwnd(stcb, net, 3,
7987 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7991 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7992 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7994 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7996 /* memory alloc failure */
8002 /* now service each destination and send out what we can for it */
8003 /* Nothing to send? */
8004 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8005 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8006 TAILQ_EMPTY(&asoc->send_queue)) {
8011 if (asoc->sctp_cmt_on_off > 0) {
8012 /* get the last start point */
8013 start_at = asoc->last_net_cmt_send_started;
8014 if (start_at == NULL) {
8015 /* null so to beginning */
8016 start_at = TAILQ_FIRST(&asoc->nets);
8018 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8019 if (start_at == NULL) {
8020 start_at = TAILQ_FIRST(&asoc->nets);
8023 asoc->last_net_cmt_send_started = start_at;
8025 start_at = TAILQ_FIRST(&asoc->nets);
8027 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8028 if (chk->whoTo == NULL) {
8029 if (asoc->alternate) {
8030 chk->whoTo = asoc->alternate;
8032 chk->whoTo = asoc->primary_destination;
8034 atomic_add_int(&chk->whoTo->ref_count, 1);
8037 old_start_at = NULL;
8038 again_one_more_time:
8039 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8040 /* how much can we send? */
8041 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8042 if (old_start_at && (old_start_at == net)) {
8043 /* through list ocmpletely. */
8047 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8048 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8049 (net->flight_size >= net->cwnd)) {
8051 * Nothing on control or asconf and flight is full,
8052 * we can skip even in the CMT case.
8057 endoutchain = outchain = NULL;
8060 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8061 skip_data_for_this_net = 1;
8063 skip_data_for_this_net = 0;
8065 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8068 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8073 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8083 if (mtu > asoc->peers_rwnd) {
8084 if (asoc->total_flight > 0) {
8085 /* We have a packet in flight somewhere */
8086 r_mtu = asoc->peers_rwnd;
8088 /* We are always allowed to send one MTU out */
8096 /************************/
8097 /* ASCONF transmission */
8098 /************************/
8099 /* Now first lets go through the asconf queue */
8100 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8101 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8104 if (chk->whoTo == NULL) {
8105 if (asoc->alternate == NULL) {
8106 if (asoc->primary_destination != net) {
8110 if (asoc->alternate != net) {
8115 if (chk->whoTo != net) {
8119 if (chk->data == NULL) {
8122 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8123 chk->sent != SCTP_DATAGRAM_RESEND) {
8127 * if no AUTH is yet included and this chunk
8128 * requires it, make sure to account for it. We
8129 * don't apply the size until the AUTH chunk is
8130 * actually added below in case there is no room for
8131 * this chunk. NOTE: we overload the use of "omtu"
8134 if ((auth == NULL) &&
8135 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8136 stcb->asoc.peer_auth_chunks)) {
8137 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8140 /* Here we do NOT factor the r_mtu */
8141 if ((chk->send_size < (int)(mtu - omtu)) ||
8142 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8144 * We probably should glom the mbuf chain
8145 * from the chk->data for control but the
8146 * problem is it becomes yet one more level
8147 * of tracking to do if for some reason
8148 * output fails. Then I have got to
8149 * reconstruct the merged control chain.. el
8150 * yucko.. for now we take the easy way and
8154 * Add an AUTH chunk, if chunk requires it
8155 * save the offset into the chain for AUTH
8157 if ((auth == NULL) &&
8158 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8159 stcb->asoc.peer_auth_chunks))) {
8160 outchain = sctp_add_auth_chunk(outchain,
8165 chk->rec.chunk_id.id);
8166 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8168 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8169 (int)chk->rec.chunk_id.can_take_data,
8170 chk->send_size, chk->copy_by_ref);
8171 if (outchain == NULL) {
8173 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8176 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8177 /* update our MTU size */
8178 if (mtu > (chk->send_size + omtu))
8179 mtu -= (chk->send_size + omtu);
8182 to_out += (chk->send_size + omtu);
8183 /* Do clear IP_DF ? */
8184 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8187 if (chk->rec.chunk_id.can_take_data)
8190 * set hb flag since we can use these for
8196 * should sysctl this: don't bundle data
8197 * with ASCONF since it requires AUTH
8200 chk->sent = SCTP_DATAGRAM_SENT;
8201 if (chk->whoTo == NULL) {
8203 atomic_add_int(&net->ref_count, 1);
8208 * Ok we are out of room but we can
8209 * output without effecting the
8210 * flight size since this little guy
8211 * is a control only packet.
8213 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8215 * do NOT clear the asconf flag as
8216 * it is used to do appropriate
8217 * source address selection.
8219 if (*now_filled == 0) {
8220 (void)SCTP_GETTIME_TIMEVAL(now);
8223 net->last_sent_time = *now;
8225 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8226 (struct sockaddr *)&net->ro._l_addr,
8227 outchain, auth_offset, auth,
8228 stcb->asoc.authinfo.active_keyid,
8229 no_fragmentflg, 0, asconf,
8230 inp->sctp_lport, stcb->rport,
8231 htonl(stcb->asoc.peer_vtag),
8236 * error, we could not
8239 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8240 if (from_where == 0) {
8241 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8243 if (error == ENOBUFS) {
8244 asoc->ifp_had_enobuf = 1;
8245 SCTP_STAT_INCR(sctps_lowlevelerr);
8247 /* error, could not output */
8248 if (error == EHOSTUNREACH) {
8254 sctp_move_chunks_from_net(stcb, net);
8259 asoc->ifp_had_enobuf = 0;
8262 * increase the number we sent, if a
8263 * cookie is sent we don't tell them
8266 outchain = endoutchain = NULL;
8270 *num_out += ctl_cnt;
8271 /* recalc a clean slate and setup */
8272 switch (net->ro._l_addr.sa.sa_family) {
8275 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8280 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8297 /************************/
8298 /* Control transmission */
8299 /************************/
8300 /* Now first lets go through the control queue */
8301 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8302 if ((sack_goes_to) &&
8303 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8304 (chk->whoTo != sack_goes_to)) {
8306 * if we have a sack in queue, and we are
8307 * looking at an ecn echo that is NOT queued
8308 * to where the sack is going..
8310 if (chk->whoTo == net) {
8312 * Don't transmit it to where its
8313 * going (current net)
8316 } else if (sack_goes_to == net) {
8318 * But do transmit it to this
8321 goto skip_net_check;
8324 if (chk->whoTo == NULL) {
8325 if (asoc->alternate == NULL) {
8326 if (asoc->primary_destination != net) {
8330 if (asoc->alternate != net) {
8335 if (chk->whoTo != net) {
8340 if (chk->data == NULL) {
8343 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8345 * It must be unsent. Cookies and ASCONF's
8346 * hang around but there timers will force
8347 * when marked for resend.
8352 * if no AUTH is yet included and this chunk
8353 * requires it, make sure to account for it. We
8354 * don't apply the size until the AUTH chunk is
8355 * actually added below in case there is no room for
8356 * this chunk. NOTE: we overload the use of "omtu"
8359 if ((auth == NULL) &&
8360 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8361 stcb->asoc.peer_auth_chunks)) {
8362 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8365 /* Here we do NOT factor the r_mtu */
8366 if ((chk->send_size <= (int)(mtu - omtu)) ||
8367 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8369 * We probably should glom the mbuf chain
8370 * from the chk->data for control but the
8371 * problem is it becomes yet one more level
8372 * of tracking to do if for some reason
8373 * output fails. Then I have got to
8374 * reconstruct the merged control chain.. el
8375 * yucko.. for now we take the easy way and
8379 * Add an AUTH chunk, if chunk requires it
8380 * save the offset into the chain for AUTH
8382 if ((auth == NULL) &&
8383 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8384 stcb->asoc.peer_auth_chunks))) {
8385 outchain = sctp_add_auth_chunk(outchain,
8390 chk->rec.chunk_id.id);
8391 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8393 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8394 (int)chk->rec.chunk_id.can_take_data,
8395 chk->send_size, chk->copy_by_ref);
8396 if (outchain == NULL) {
8398 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8401 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8402 /* update our MTU size */
8403 if (mtu > (chk->send_size + omtu))
8404 mtu -= (chk->send_size + omtu);
8407 to_out += (chk->send_size + omtu);
8408 /* Do clear IP_DF ? */
8409 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8412 if (chk->rec.chunk_id.can_take_data)
8414 /* Mark things to be removed, if needed */
8415 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8416 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8417 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8418 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8419 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8420 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8421 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8422 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8423 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8424 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8425 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8426 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8429 /* remove these chunks at the end */
8430 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8431 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8432 /* turn off the timer */
8433 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8434 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8436 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8442 * Other chunks, since they have
8443 * timers running (i.e. COOKIE) we
8444 * just "trust" that it gets sent or
8448 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8451 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8453 * Increment ecne send count
8454 * here this means we may be
8455 * over-zealous in our
8456 * counting if the send
8457 * fails, but its the best
8458 * place to do it (we used
8459 * to do it in the queue of
8460 * the chunk, but that did
8461 * not tell how many times
8464 SCTP_STAT_INCR(sctps_sendecne);
8466 chk->sent = SCTP_DATAGRAM_SENT;
8467 if (chk->whoTo == NULL) {
8469 atomic_add_int(&net->ref_count, 1);
8475 * Ok we are out of room but we can
8476 * output without effecting the
8477 * flight size since this little guy
8478 * is a control only packet.
8481 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8483 * do NOT clear the asconf
8484 * flag as it is used to do
8485 * appropriate source
8486 * address selection.
8490 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8493 /* Only HB or ASCONF advances time */
8495 if (*now_filled == 0) {
8496 (void)SCTP_GETTIME_TIMEVAL(now);
8499 net->last_sent_time = *now;
8502 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8503 (struct sockaddr *)&net->ro._l_addr,
8506 stcb->asoc.authinfo.active_keyid,
8507 no_fragmentflg, 0, asconf,
8508 inp->sctp_lport, stcb->rport,
8509 htonl(stcb->asoc.peer_vtag),
8514 * error, we could not
8517 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8518 if (from_where == 0) {
8519 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8521 if (error == ENOBUFS) {
8522 asoc->ifp_had_enobuf = 1;
8523 SCTP_STAT_INCR(sctps_lowlevelerr);
8525 if (error == EHOSTUNREACH) {
8531 sctp_move_chunks_from_net(stcb, net);
8536 asoc->ifp_had_enobuf = 0;
8539 * increase the number we sent, if a
8540 * cookie is sent we don't tell them
8543 outchain = endoutchain = NULL;
8547 *num_out += ctl_cnt;
8548 /* recalc a clean slate and setup */
8549 switch (net->ro._l_addr.sa.sa_family) {
8552 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8557 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8574 /* JRI: if dest is in PF state, do not send data to it */
8575 if ((asoc->sctp_cmt_on_off > 0) &&
8576 (net != stcb->asoc.alternate) &&
8577 (net->dest_state & SCTP_ADDR_PF)) {
8580 if (net->flight_size >= net->cwnd) {
8583 if ((asoc->sctp_cmt_on_off > 0) &&
8584 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8585 (net->flight_size > max_rwnd_per_dest)) {
8589 * We need a specific accounting for the usage of the send
8590 * buffer. We also need to check the number of messages per
8591 * net. For now, this is better than nothing and it disabled
8594 if ((asoc->sctp_cmt_on_off > 0) &&
8595 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8596 (max_send_per_dest > 0) &&
8597 (net->flight_size > max_send_per_dest)) {
8600 /*********************/
8601 /* Data transmission */
8602 /*********************/
8604 * if AUTH for DATA is required and no AUTH has been added
8605 * yet, account for this in the mtu now... if no data can be
8606 * bundled, this adjustment won't matter anyways since the
8607 * packet will be going out...
8609 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8610 stcb->asoc.peer_auth_chunks);
8611 if (data_auth_reqd && (auth == NULL)) {
8612 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8614 /* now lets add any data within the MTU constraints */
8615 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8618 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8619 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8626 if (net->mtu > SCTP_MIN_OVERHEAD)
8627 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8637 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8638 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8639 (skip_data_for_this_net == 0)) ||
8641 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8642 if (no_data_chunks) {
8643 /* let only control go out */
8647 if (net->flight_size >= net->cwnd) {
8648 /* skip this net, no room for data */
8652 if ((chk->whoTo != NULL) &&
8653 (chk->whoTo != net)) {
8654 /* Don't send the chunk on this net */
8658 if (asoc->sctp_cmt_on_off == 0) {
8659 if ((asoc->alternate) &&
8660 (asoc->alternate != net) &&
8661 (chk->whoTo == NULL)) {
8663 } else if ((net != asoc->primary_destination) &&
8664 (asoc->alternate == NULL) &&
8665 (chk->whoTo == NULL)) {
8669 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8671 * strange, we have a chunk that is
8672 * to big for its destination and
8673 * yet no fragment ok flag.
8674 * Something went wrong when the
8675 * PMTU changed...we did not mark
8676 * this chunk for some reason?? I
8677 * will fix it here by letting IP
8678 * fragment it for now and printing
8679 * a warning. This really should not
8682 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8683 chk->send_size, mtu);
8684 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8686 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8687 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8688 struct sctp_data_chunk *dchkh;
8690 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8691 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8693 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8694 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8695 /* ok we will add this one */
8698 * Add an AUTH chunk, if chunk
8699 * requires it, save the offset into
8700 * the chain for AUTH
8702 if (data_auth_reqd) {
8704 outchain = sctp_add_auth_chunk(outchain,
8710 auth_keyid = chk->auth_keyid;
8712 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8713 } else if (override_ok) {
8718 auth_keyid = chk->auth_keyid;
8720 } else if (auth_keyid != chk->auth_keyid) {
8728 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8729 chk->send_size, chk->copy_by_ref);
8730 if (outchain == NULL) {
8731 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8732 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8733 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8736 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8739 /* upate our MTU size */
8740 /* Do clear IP_DF ? */
8741 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8744 /* unsigned subtraction of mtu */
8745 if (mtu > chk->send_size)
8746 mtu -= chk->send_size;
8749 /* unsigned subtraction of r_mtu */
8750 if (r_mtu > chk->send_size)
8751 r_mtu -= chk->send_size;
8755 to_out += chk->send_size;
8756 if ((to_out > mx_mtu) && no_fragmentflg) {
8758 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8760 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8764 chk->window_probe = 0;
8765 data_list[bundle_at++] = chk;
8766 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8769 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8770 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8771 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8773 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8775 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8776 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8786 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8788 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8789 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8790 data_list[0]->window_probe = 1;
8791 net->window_probe = 1;
8797 * Must be sent in order of the
8798 * TSN's (on a network)
8802 } /* for (chunk gather loop for this net) */
8803 } /* if asoc.state OPEN */
8805 /* Is there something to send for this destination? */
8807 /* We may need to start a control timer or two */
8809 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8812 * do NOT clear the asconf flag as it is
8813 * used to do appropriate source address
8818 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8821 /* must start a send timer if data is being sent */
8822 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8824 * no timer running on this destination
8827 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8829 if (bundle_at || hbflag) {
8830 /* For data/asconf and hb set time */
8831 if (*now_filled == 0) {
8832 (void)SCTP_GETTIME_TIMEVAL(now);
8835 net->last_sent_time = *now;
8837 /* Now send it, if there is anything to send :> */
8838 if ((error = sctp_lowlevel_chunk_output(inp,
8841 (struct sockaddr *)&net->ro._l_addr,
8849 inp->sctp_lport, stcb->rport,
8850 htonl(stcb->asoc.peer_vtag),
8854 /* error, we could not output */
8855 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8856 if (from_where == 0) {
8857 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8859 if (error == ENOBUFS) {
8860 asoc->ifp_had_enobuf = 1;
8861 SCTP_STAT_INCR(sctps_lowlevelerr);
8863 if (error == EHOSTUNREACH) {
8865 * Destination went unreachable
8868 sctp_move_chunks_from_net(stcb, net);
8872 * I add this line to be paranoid. As far as
8873 * I can tell the continue, takes us back to
8874 * the top of the for, but just to make sure
8875 * I will reset these again here.
8877 ctl_cnt = bundle_at = 0;
8878 continue; /* This takes us back to the
8879 * for() for the nets. */
8881 asoc->ifp_had_enobuf = 0;
8887 *num_out += (ctl_cnt + bundle_at);
8890 /* setup for a RTO measurement */
8891 tsns_sent = data_list[0]->rec.data.tsn;
8892 /* fill time if not already filled */
8893 if (*now_filled == 0) {
8894 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8896 *now = asoc->time_last_sent;
8898 asoc->time_last_sent = *now;
8900 if (net->rto_needed) {
8901 data_list[0]->do_rtt = 1;
8902 net->rto_needed = 0;
8904 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8905 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8911 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8912 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8915 if (old_start_at == NULL) {
8916 old_start_at = start_at;
8917 start_at = TAILQ_FIRST(&asoc->nets);
8919 goto again_one_more_time;
8923 * At the end there should be no NON timed chunks hanging on this
8926 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8927 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8929 if ((*num_out == 0) && (*reason_code == 0)) {
8934 sctp_clean_up_ctl(stcb, asoc, so_locked);
8939 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8942 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8943 * the control chunk queue.
8945 struct sctp_chunkhdr *hdr;
8946 struct sctp_tmit_chunk *chk;
8947 struct mbuf *mat, *last_mbuf;
8948 uint32_t chunk_length;
8949 uint16_t padding_length;
8951 SCTP_TCB_LOCK_ASSERT(stcb);
8952 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8953 if (op_err == NULL) {
8958 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8959 chunk_length += SCTP_BUF_LEN(mat);
8960 if (SCTP_BUF_NEXT(mat) == NULL) {
8964 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8965 sctp_m_freem(op_err);
8968 padding_length = chunk_length % 4;
8969 if (padding_length != 0) {
8970 padding_length = 4 - padding_length;
8972 if (padding_length != 0) {
8973 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8974 sctp_m_freem(op_err);
8978 sctp_alloc_a_chunk(stcb, chk);
8981 sctp_m_freem(op_err);
8984 chk->copy_by_ref = 0;
8985 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8986 chk->rec.chunk_id.can_take_data = 0;
8988 chk->send_size = (uint16_t)chunk_length;
8989 chk->sent = SCTP_DATAGRAM_UNSENT;
8991 chk->asoc = &stcb->asoc;
8994 hdr = mtod(op_err, struct sctp_chunkhdr *);
8995 hdr->chunk_type = SCTP_OPERATION_ERROR;
8996 hdr->chunk_flags = 0;
8997 hdr->chunk_length = htons(chk->send_size);
8998 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8999 chk->asoc->ctrl_queue_cnt++;
9003 sctp_send_cookie_echo(struct mbuf *m,
9005 struct sctp_tcb *stcb,
9006 struct sctp_nets *net)
9009 * pull out the cookie and put it at the front of the control chunk
9013 struct mbuf *cookie;
9014 struct sctp_paramhdr param, *phdr;
9015 struct sctp_chunkhdr *hdr;
9016 struct sctp_tmit_chunk *chk;
9017 uint16_t ptype, plen;
9019 SCTP_TCB_LOCK_ASSERT(stcb);
9020 /* First find the cookie in the param area */
9022 at = offset + sizeof(struct sctp_init_chunk);
9024 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
9028 ptype = ntohs(phdr->param_type);
9029 plen = ntohs(phdr->param_length);
9030 if (ptype == SCTP_STATE_COOKIE) {
9033 /* found the cookie */
9034 if ((pad = (plen % 4))) {
9037 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9038 if (cookie == NULL) {
9042 #ifdef SCTP_MBUF_LOGGING
9043 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9044 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9049 at += SCTP_SIZE32(plen);
9051 /* ok, we got the cookie lets change it into a cookie echo chunk */
9052 /* first the change from param to cookie */
9053 hdr = mtod(cookie, struct sctp_chunkhdr *);
9054 hdr->chunk_type = SCTP_COOKIE_ECHO;
9055 hdr->chunk_flags = 0;
9056 /* get the chunk stuff now and place it in the FRONT of the queue */
9057 sctp_alloc_a_chunk(stcb, chk);
9060 sctp_m_freem(cookie);
9063 chk->copy_by_ref = 0;
9064 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9065 chk->rec.chunk_id.can_take_data = 0;
9066 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9067 chk->send_size = plen;
9068 chk->sent = SCTP_DATAGRAM_UNSENT;
9070 chk->asoc = &stcb->asoc;
9073 atomic_add_int(&chk->whoTo->ref_count, 1);
9074 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9075 chk->asoc->ctrl_queue_cnt++;
9080 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9084 struct sctp_nets *net)
9087 * take a HB request and make it into a HB ack and send it.
9089 struct mbuf *outchain;
9090 struct sctp_chunkhdr *chdr;
9091 struct sctp_tmit_chunk *chk;
9094 /* must have a net pointer */
9097 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9098 if (outchain == NULL) {
9099 /* gak out of memory */
9102 #ifdef SCTP_MBUF_LOGGING
9103 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9104 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9107 chdr = mtod(outchain, struct sctp_chunkhdr *);
9108 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9109 chdr->chunk_flags = 0;
9110 if (chk_length % 4 != 0) {
9111 sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
9113 sctp_alloc_a_chunk(stcb, chk);
9116 sctp_m_freem(outchain);
9119 chk->copy_by_ref = 0;
9120 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9121 chk->rec.chunk_id.can_take_data = 1;
9123 chk->send_size = chk_length;
9124 chk->sent = SCTP_DATAGRAM_UNSENT;
9126 chk->asoc = &stcb->asoc;
9127 chk->data = outchain;
9129 atomic_add_int(&chk->whoTo->ref_count, 1);
9130 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9131 chk->asoc->ctrl_queue_cnt++;
9135 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9137 /* formulate and queue a cookie-ack back to sender */
9138 struct mbuf *cookie_ack;
9139 struct sctp_chunkhdr *hdr;
9140 struct sctp_tmit_chunk *chk;
9142 SCTP_TCB_LOCK_ASSERT(stcb);
9144 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9145 if (cookie_ack == NULL) {
9149 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9150 sctp_alloc_a_chunk(stcb, chk);
9153 sctp_m_freem(cookie_ack);
9156 chk->copy_by_ref = 0;
9157 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9158 chk->rec.chunk_id.can_take_data = 1;
9160 chk->send_size = sizeof(struct sctp_chunkhdr);
9161 chk->sent = SCTP_DATAGRAM_UNSENT;
9163 chk->asoc = &stcb->asoc;
9164 chk->data = cookie_ack;
9165 if (chk->asoc->last_control_chunk_from != NULL) {
9166 chk->whoTo = chk->asoc->last_control_chunk_from;
9167 atomic_add_int(&chk->whoTo->ref_count, 1);
9171 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9172 hdr->chunk_type = SCTP_COOKIE_ACK;
9173 hdr->chunk_flags = 0;
9174 hdr->chunk_length = htons(chk->send_size);
9175 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9176 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9177 chk->asoc->ctrl_queue_cnt++;
9183 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9185 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9186 struct mbuf *m_shutdown_ack;
9187 struct sctp_shutdown_ack_chunk *ack_cp;
9188 struct sctp_tmit_chunk *chk;
9190 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9191 if (m_shutdown_ack == NULL) {
9195 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9196 sctp_alloc_a_chunk(stcb, chk);
9199 sctp_m_freem(m_shutdown_ack);
9202 chk->copy_by_ref = 0;
9203 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9204 chk->rec.chunk_id.can_take_data = 1;
9206 chk->send_size = sizeof(struct sctp_chunkhdr);
9207 chk->sent = SCTP_DATAGRAM_UNSENT;
9209 chk->asoc = &stcb->asoc;
9210 chk->data = m_shutdown_ack;
9213 atomic_add_int(&chk->whoTo->ref_count, 1);
9215 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9216 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9217 ack_cp->ch.chunk_flags = 0;
9218 ack_cp->ch.chunk_length = htons(chk->send_size);
9219 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9220 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9221 chk->asoc->ctrl_queue_cnt++;
9226 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9228 /* formulate and queue a SHUTDOWN to the sender */
9229 struct mbuf *m_shutdown;
9230 struct sctp_shutdown_chunk *shutdown_cp;
9231 struct sctp_tmit_chunk *chk;
9233 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9234 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9235 /* We already have a SHUTDOWN queued. Reuse it. */
9237 sctp_free_remote_addr(chk->whoTo);
9244 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9245 if (m_shutdown == NULL) {
9249 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9250 sctp_alloc_a_chunk(stcb, chk);
9253 sctp_m_freem(m_shutdown);
9256 chk->copy_by_ref = 0;
9257 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9258 chk->rec.chunk_id.can_take_data = 1;
9260 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9261 chk->sent = SCTP_DATAGRAM_UNSENT;
9263 chk->asoc = &stcb->asoc;
9264 chk->data = m_shutdown;
9267 atomic_add_int(&chk->whoTo->ref_count, 1);
9269 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9270 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9271 shutdown_cp->ch.chunk_flags = 0;
9272 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9273 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9274 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9275 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9276 chk->asoc->ctrl_queue_cnt++;
9278 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9281 atomic_add_int(&chk->whoTo->ref_count, 1);
9283 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9284 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9285 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9291 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9294 * formulate and queue an ASCONF to the peer. ASCONF parameters
9295 * should be queued on the assoc queue.
9297 struct sctp_tmit_chunk *chk;
9298 struct mbuf *m_asconf;
9301 SCTP_TCB_LOCK_ASSERT(stcb);
9303 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9304 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9305 /* can't send a new one if there is one in flight already */
9309 /* compose an ASCONF chunk, maximum length is PMTU */
9310 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9311 if (m_asconf == NULL) {
9315 sctp_alloc_a_chunk(stcb, chk);
9318 sctp_m_freem(m_asconf);
9322 chk->copy_by_ref = 0;
9323 chk->rec.chunk_id.id = SCTP_ASCONF;
9324 chk->rec.chunk_id.can_take_data = 0;
9325 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9326 chk->data = m_asconf;
9327 chk->send_size = len;
9328 chk->sent = SCTP_DATAGRAM_UNSENT;
9330 chk->asoc = &stcb->asoc;
9333 atomic_add_int(&chk->whoTo->ref_count, 1);
9335 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9336 chk->asoc->ctrl_queue_cnt++;
9341 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9344 * formulate and queue a asconf-ack back to sender. the asconf-ack
9345 * must be stored in the tcb.
9347 struct sctp_tmit_chunk *chk;
9348 struct sctp_asconf_ack *ack, *latest_ack;
9350 struct sctp_nets *net = NULL;
9352 SCTP_TCB_LOCK_ASSERT(stcb);
9353 /* Get the latest ASCONF-ACK */
9354 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9355 if (latest_ack == NULL) {
9358 if (latest_ack->last_sent_to != NULL &&
9359 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9360 /* we're doing a retransmission */
9361 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9364 if (stcb->asoc.last_control_chunk_from == NULL) {
9365 if (stcb->asoc.alternate) {
9366 net = stcb->asoc.alternate;
9368 net = stcb->asoc.primary_destination;
9371 net = stcb->asoc.last_control_chunk_from;
9376 if (stcb->asoc.last_control_chunk_from == NULL) {
9377 if (stcb->asoc.alternate) {
9378 net = stcb->asoc.alternate;
9380 net = stcb->asoc.primary_destination;
9383 net = stcb->asoc.last_control_chunk_from;
9386 latest_ack->last_sent_to = net;
9388 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9389 if (ack->data == NULL) {
9393 /* copy the asconf_ack */
9394 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9395 if (m_ack == NULL) {
9396 /* couldn't copy it */
9399 #ifdef SCTP_MBUF_LOGGING
9400 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9401 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9405 sctp_alloc_a_chunk(stcb, chk);
9409 sctp_m_freem(m_ack);
9412 chk->copy_by_ref = 0;
9413 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9414 chk->rec.chunk_id.can_take_data = 1;
9415 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9418 atomic_add_int(&chk->whoTo->ref_count, 1);
9421 chk->send_size = ack->len;
9422 chk->sent = SCTP_DATAGRAM_UNSENT;
9424 chk->asoc = &stcb->asoc;
9426 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9427 chk->asoc->ctrl_queue_cnt++;
9434 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9435 struct sctp_tcb *stcb,
9436 struct sctp_association *asoc,
9437 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9438 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9444 * send out one MTU of retransmission. If fast_retransmit is
9445 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9446 * rwnd. For a Cookie or Asconf in the control chunk queue we
9447 * retransmit them by themselves.
9449 * For data chunks we will pick out the lowest TSN's in the sent_queue
9450 * marked for resend and bundle them all together (up to a MTU of
9451 * destination). The address to send to should have been
9452 * selected/changed where the retransmission was marked (i.e. in FR
9453 * or t3-timeout routines).
9455 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9456 struct sctp_tmit_chunk *chk, *fwd;
9457 struct mbuf *m, *endofchain;
9458 struct sctp_nets *net = NULL;
9459 uint32_t tsns_sent = 0;
9460 int no_fragmentflg, bundle_at, cnt_thru;
9462 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9463 struct sctp_auth_chunk *auth = NULL;
9464 uint32_t auth_offset = 0;
9465 uint16_t auth_keyid;
9466 int override_ok = 1;
9467 int data_auth_reqd = 0;
9470 SCTP_TCB_LOCK_ASSERT(stcb);
9471 tmr_started = ctl_cnt = bundle_at = error = 0;
9476 endofchain = m = NULL;
9477 auth_keyid = stcb->asoc.authinfo.active_keyid;
9478 #ifdef SCTP_AUDITING_ENABLED
9479 sctp_audit_log(0xC3, 1);
9481 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9482 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9483 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9484 asoc->sent_queue_retran_cnt);
9485 asoc->sent_queue_cnt = 0;
9486 asoc->sent_queue_cnt_removeable = 0;
9487 /* send back 0/0 so we enter normal transmission */
9491 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9492 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9493 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9494 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9495 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9498 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9499 if (chk != asoc->str_reset) {
9501 * not eligible for retran if its
9508 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9512 * Add an AUTH chunk, if chunk requires it save the
9513 * offset into the chain for AUTH
9515 if ((auth == NULL) &&
9516 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9517 stcb->asoc.peer_auth_chunks))) {
9518 m = sctp_add_auth_chunk(m, &endofchain,
9519 &auth, &auth_offset,
9521 chk->rec.chunk_id.id);
9522 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9524 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9530 /* do we have control chunks to retransmit? */
9532 /* Start a timer no matter if we succeed or fail */
9533 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9534 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9535 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9536 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9537 chk->snd_count++; /* update our count */
9538 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9539 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9540 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9541 no_fragmentflg, 0, 0,
9542 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9543 chk->whoTo->port, NULL,
9546 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9547 if (error == ENOBUFS) {
9548 asoc->ifp_had_enobuf = 1;
9549 SCTP_STAT_INCR(sctps_lowlevelerr);
9553 asoc->ifp_had_enobuf = 0;
9559 * We don't want to mark the net->sent time here since this
9560 * we use this for HB and retrans cannot measure RTT
9562 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9564 chk->sent = SCTP_DATAGRAM_SENT;
9565 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9569 /* Clean up the fwd-tsn list */
9570 sctp_clean_up_ctl(stcb, asoc, so_locked);
9575 * Ok, it is just data retransmission we need to do or that and a
9576 * fwd-tsn with it all.
9578 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9579 return (SCTP_RETRAN_DONE);
9581 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9582 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9583 /* not yet open, resend the cookie and that is it */
9586 #ifdef SCTP_AUDITING_ENABLED
9587 sctp_auditing(20, inp, stcb, NULL);
9589 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9590 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9591 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9592 /* No, not sent to this net or not ready for rtx */
9595 if (chk->data == NULL) {
9596 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9597 chk->rec.data.tsn, chk->snd_count, chk->sent);
9600 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9601 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9602 struct mbuf *op_err;
9603 char msg[SCTP_DIAG_INFO_LEN];
9605 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9606 chk->rec.data.tsn, chk->snd_count);
9607 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9609 atomic_add_int(&stcb->asoc.refcnt, 1);
9610 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9612 SCTP_TCB_LOCK(stcb);
9613 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9614 return (SCTP_RETRAN_EXIT);
9616 /* pick up the net */
9618 switch (net->ro._l_addr.sa.sa_family) {
9621 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9626 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9635 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9636 /* No room in peers rwnd */
9639 tsn = asoc->last_acked_seq + 1;
9640 if (tsn == chk->rec.data.tsn) {
9642 * we make a special exception for this
9643 * case. The peer has no rwnd but is missing
9644 * the lowest chunk.. which is probably what
9645 * is holding up the rwnd.
9647 goto one_chunk_around;
9652 if (asoc->peers_rwnd < mtu) {
9654 if ((asoc->peers_rwnd == 0) &&
9655 (asoc->total_flight == 0)) {
9656 chk->window_probe = 1;
9657 chk->whoTo->window_probe = 1;
9660 #ifdef SCTP_AUDITING_ENABLED
9661 sctp_audit_log(0xC3, 2);
9665 net->fast_retran_ip = 0;
9666 if (chk->rec.data.doing_fast_retransmit == 0) {
9668 * if no FR in progress skip destination that have
9669 * flight_size > cwnd.
9671 if (net->flight_size >= net->cwnd) {
9676 * Mark the destination net to have FR recovery
9680 net->fast_retran_ip = 1;
9684 * if no AUTH is yet included and this chunk requires it,
9685 * make sure to account for it. We don't apply the size
9686 * until the AUTH chunk is actually added below in case
9687 * there is no room for this chunk.
9689 if (data_auth_reqd && (auth == NULL)) {
9690 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9694 if ((chk->send_size <= (mtu - dmtu)) ||
9695 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9696 /* ok we will add this one */
9697 if (data_auth_reqd) {
9699 m = sctp_add_auth_chunk(m,
9705 auth_keyid = chk->auth_keyid;
9707 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9708 } else if (override_ok) {
9709 auth_keyid = chk->auth_keyid;
9711 } else if (chk->auth_keyid != auth_keyid) {
9712 /* different keyid, so done bundling */
9716 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9718 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9721 /* Do clear IP_DF ? */
9722 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9725 /* upate our MTU size */
9726 if (mtu > (chk->send_size + dmtu))
9727 mtu -= (chk->send_size + dmtu);
9730 data_list[bundle_at++] = chk;
9731 if (one_chunk && (asoc->total_flight <= 0)) {
9732 SCTP_STAT_INCR(sctps_windowprobed);
9735 if (one_chunk == 0) {
9737 * now are there anymore forward from chk to pick
9740 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9741 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9742 /* Nope, not for retran */
9745 if (fwd->whoTo != net) {
9746 /* Nope, not the net in question */
9749 if (data_auth_reqd && (auth == NULL)) {
9750 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9753 if (fwd->send_size <= (mtu - dmtu)) {
9754 if (data_auth_reqd) {
9756 m = sctp_add_auth_chunk(m,
9762 auth_keyid = fwd->auth_keyid;
9764 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9765 } else if (override_ok) {
9766 auth_keyid = fwd->auth_keyid;
9768 } else if (fwd->auth_keyid != auth_keyid) {
9776 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9778 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9781 /* Do clear IP_DF ? */
9782 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9785 /* upate our MTU size */
9786 if (mtu > (fwd->send_size + dmtu))
9787 mtu -= (fwd->send_size + dmtu);
9790 data_list[bundle_at++] = fwd;
9791 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9795 /* can't fit so we are done */
9800 /* Is there something to send for this destination? */
9803 * No matter if we fail/or succeed we should start a
9804 * timer. A failure is like a lost IP packet :-)
9806 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9808 * no timer running on this destination
9811 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9814 /* Now lets send it, if there is anything to send :> */
9815 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9816 (struct sockaddr *)&net->ro._l_addr, m,
9817 auth_offset, auth, auth_keyid,
9818 no_fragmentflg, 0, 0,
9819 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9823 /* error, we could not output */
9824 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9825 if (error == ENOBUFS) {
9826 asoc->ifp_had_enobuf = 1;
9827 SCTP_STAT_INCR(sctps_lowlevelerr);
9831 asoc->ifp_had_enobuf = 0;
9838 * We don't want to mark the net->sent time here
9839 * since this we use this for HB and retrans cannot
9842 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9844 /* For auto-close */
9846 if (*now_filled == 0) {
9847 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9848 *now = asoc->time_last_sent;
9851 asoc->time_last_sent = *now;
9853 *cnt_out += bundle_at;
9854 #ifdef SCTP_AUDITING_ENABLED
9855 sctp_audit_log(0xC4, bundle_at);
9858 tsns_sent = data_list[0]->rec.data.tsn;
9860 for (i = 0; i < bundle_at; i++) {
9861 SCTP_STAT_INCR(sctps_sendretransdata);
9862 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9864 * When we have a revoked data, and we
9865 * retransmit it, then we clear the revoked
9866 * flag since this flag dictates if we
9867 * subtracted from the fs
9869 if (data_list[i]->rec.data.chunk_was_revoked) {
9870 /* Deflate the cwnd */
9871 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9872 data_list[i]->rec.data.chunk_was_revoked = 0;
9874 data_list[i]->snd_count++;
9875 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9876 /* record the time */
9877 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9878 if (data_list[i]->book_size_scale) {
9880 * need to double the book size on
9883 data_list[i]->book_size_scale = 0;
9885 * Since we double the booksize, we
9886 * must also double the output queue
9887 * size, since this get shrunk when
9888 * we free by this amount.
9890 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9891 data_list[i]->book_size *= 2;
9895 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9896 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9897 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9899 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9900 (uint32_t)(data_list[i]->send_size +
9901 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9903 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9904 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9905 data_list[i]->whoTo->flight_size,
9906 data_list[i]->book_size,
9907 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9908 data_list[i]->rec.data.tsn);
9910 sctp_flight_size_increase(data_list[i]);
9911 sctp_total_flight_increase(stcb, data_list[i]);
9912 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9913 /* SWS sender side engages */
9914 asoc->peers_rwnd = 0;
9917 (data_list[i]->rec.data.doing_fast_retransmit)) {
9918 SCTP_STAT_INCR(sctps_sendfastretrans);
9919 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9920 (tmr_started == 0)) {
9922 * ok we just fast-retrans'd
9923 * the lowest TSN, i.e the
9924 * first on the list. In
9925 * this case we want to give
9926 * some more time to get a
9927 * SACK back without a
9930 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9931 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9932 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9936 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9937 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9939 #ifdef SCTP_AUDITING_ENABLED
9940 sctp_auditing(21, inp, stcb, NULL);
9946 if (asoc->sent_queue_retran_cnt <= 0) {
9947 /* all done we have no more to retran */
9948 asoc->sent_queue_retran_cnt = 0;
9952 /* No more room in rwnd */
9955 /* stop the for loop here. we sent out a packet */
9962 sctp_timer_validation(struct sctp_inpcb *inp,
9963 struct sctp_tcb *stcb,
9964 struct sctp_association *asoc)
9966 struct sctp_nets *net;
9968 /* Validate that a timer is running somewhere */
9969 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9970 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9971 /* Here is a timer */
9975 SCTP_TCB_LOCK_ASSERT(stcb);
9976 /* Gak, we did not have a timer somewhere */
9977 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9978 if (asoc->alternate) {
9979 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9981 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9987 sctp_chunk_output(struct sctp_inpcb *inp,
9988 struct sctp_tcb *stcb,
9991 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9997 * Ok this is the generic chunk service queue. we must do the
9999 * - See if there are retransmits pending, if so we must
10001 * - Service the stream queue that is next, moving any
10002 * message (note I must get a complete message i.e.
10003 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
10005 * - Check to see if the cwnd/rwnd allows any output, if so we
10006 * go ahead and fomulate and send the low level chunks. Making sure
10007 * to combine any control in the control chunk queue also.
10009 struct sctp_association *asoc;
10010 struct sctp_nets *net;
10011 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
10012 unsigned int burst_cnt = 0;
10013 struct timeval now;
10014 int now_filled = 0;
10016 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10019 unsigned int tot_frs = 0;
10021 asoc = &stcb->asoc;
10023 /* The Nagle algorithm is only applied when handling a send call. */
10024 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10025 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10033 SCTP_TCB_LOCK_ASSERT(stcb);
10035 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10037 if ((un_sent <= 0) &&
10038 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10039 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10040 (asoc->sent_queue_retran_cnt == 0) &&
10041 (asoc->trigger_reset == 0)) {
10042 /* Nothing to do unless there is something to be sent left */
10046 * Do we have something to send, data or control AND a sack timer
10047 * running, if so piggy-back the sack.
10049 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10050 sctp_send_sack(stcb, so_locked);
10051 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10053 while (asoc->sent_queue_retran_cnt) {
10055 * Ok, it is retransmission time only, we send out only ONE
10056 * packet with a single call off to the retran code.
10058 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10060 * Special hook for handling cookiess discarded
10061 * by peer that carried data. Send cookie-ack only
10062 * and then the next call with get the retran's.
10064 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10066 &now, &now_filled, frag_point, so_locked);
10068 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10069 /* if its not from a HB then do it */
10071 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10077 * its from any other place, we don't allow retran
10078 * output (only control)
10083 /* Can't send anymore */
10085 * now lets push out control by calling med-level
10086 * output once. this assures that we WILL send HB's
10089 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10091 &now, &now_filled, frag_point, so_locked);
10092 #ifdef SCTP_AUDITING_ENABLED
10093 sctp_auditing(8, inp, stcb, NULL);
10095 sctp_timer_validation(inp, stcb, asoc);
10100 * The count was off.. retran is not happening so do
10101 * the normal retransmission.
10103 #ifdef SCTP_AUDITING_ENABLED
10104 sctp_auditing(9, inp, stcb, NULL);
10106 if (ret == SCTP_RETRAN_EXIT) {
10111 if (from_where == SCTP_OUTPUT_FROM_T3) {
10112 /* Only one transmission allowed out of a timeout */
10113 #ifdef SCTP_AUDITING_ENABLED
10114 sctp_auditing(10, inp, stcb, NULL);
10116 /* Push out any control */
10117 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10118 &now, &now_filled, frag_point, so_locked);
10121 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10122 /* Hit FR burst limit */
10125 if ((num_out == 0) && (ret == 0)) {
10126 /* No more retrans to send */
10130 #ifdef SCTP_AUDITING_ENABLED
10131 sctp_auditing(12, inp, stcb, NULL);
10133 /* Check for bad destinations, if they exist move chunks around. */
10134 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10135 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10137 * if possible move things off of this address we
10138 * still may send below due to the dormant state but
10139 * we try to find an alternate address to send to
10140 * and if we have one we move all queued data on the
10141 * out wheel to this alternate address.
10143 if (net->ref_count > 1)
10144 sctp_move_chunks_from_net(stcb, net);
10147 * if ((asoc->sat_network) || (net->addr_is_local))
10148 * { burst_limit = asoc->max_burst *
10149 * SCTP_SAT_NETWORK_BURST_INCR; }
10151 if (asoc->max_burst > 0) {
10152 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10153 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10155 * JRS - Use the congestion
10156 * control given in the
10157 * congestion control module
10159 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10160 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10161 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10163 SCTP_STAT_INCR(sctps_maxburstqueued);
10165 net->fast_retran_ip = 0;
10167 if (net->flight_size == 0) {
10169 * Should be decaying the
10181 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10182 &reason_code, 0, from_where,
10183 &now, &now_filled, frag_point, so_locked);
10185 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10186 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10187 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10189 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10190 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10191 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10195 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10197 tot_out += num_out;
10199 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10200 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10201 if (num_out == 0) {
10202 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10207 * When the Nagle algorithm is used, look at how
10208 * much is unsent, then if its smaller than an MTU
10209 * and we have data in flight we stop, except if we
10210 * are handling a fragmented user message.
10212 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10213 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10214 (stcb->asoc.total_flight > 0)) {
10215 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10219 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10220 TAILQ_EMPTY(&asoc->send_queue) &&
10221 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10222 /* Nothing left to send */
10225 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10226 /* Nothing left to send */
10229 } while (num_out &&
10230 ((asoc->max_burst == 0) ||
10231 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10232 (burst_cnt < asoc->max_burst)));
10234 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10235 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10236 SCTP_STAT_INCR(sctps_maxburstqueued);
10237 asoc->burst_limit_applied = 1;
10238 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10239 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10242 asoc->burst_limit_applied = 0;
10245 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10246 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10252 * Now we need to clean up the control chunk chain if a ECNE is on
10253 * it. It must be marked as UNSENT again so next call will continue
10254 * to send it until such time that we get a CWR, to remove it.
10256 if (stcb->asoc.ecn_echo_cnt_onq)
10257 sctp_fix_ecn_echo(asoc);
10259 if (stcb->asoc.trigger_reset) {
10260 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10270 struct sctp_inpcb *inp,
10272 struct sockaddr *addr,
10273 struct mbuf *control,
10278 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10282 if (inp->sctp_socket == NULL) {
10283 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10286 return (sctp_sosend(inp->sctp_socket,
10288 (struct uio *)NULL,
10296 send_forward_tsn(struct sctp_tcb *stcb,
10297 struct sctp_association *asoc)
10299 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10300 struct sctp_forward_tsn_chunk *fwdtsn;
10301 struct sctp_strseq *strseq;
10302 struct sctp_strseq_mid *strseq_m;
10303 uint32_t advance_peer_ack_point;
10304 unsigned int cnt_of_space, i, ovh;
10305 unsigned int space_needed;
10306 unsigned int cnt_of_skipped = 0;
10308 SCTP_TCB_LOCK_ASSERT(stcb);
10309 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10310 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10311 /* mark it to unsent */
10312 chk->sent = SCTP_DATAGRAM_UNSENT;
10313 chk->snd_count = 0;
10314 /* Do we correct its output location? */
10316 sctp_free_remote_addr(chk->whoTo);
10319 goto sctp_fill_in_rest;
10322 /* Ok if we reach here we must build one */
10323 sctp_alloc_a_chunk(stcb, chk);
10327 asoc->fwd_tsn_cnt++;
10328 chk->copy_by_ref = 0;
10330 * We don't do the old thing here since this is used not for on-wire
10331 * but to tell if we are sending a fwd-tsn by the stack during
10332 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10334 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10335 chk->rec.chunk_id.can_take_data = 0;
10339 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10340 if (chk->data == NULL) {
10341 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10344 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10345 chk->sent = SCTP_DATAGRAM_UNSENT;
10346 chk->snd_count = 0;
10347 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10348 asoc->ctrl_queue_cnt++;
10351 * Here we go through and fill out the part that deals with
10352 * stream/seq of the ones we skip.
10354 SCTP_BUF_LEN(chk->data) = 0;
10355 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10356 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10357 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10358 /* no more to look at */
10361 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10362 /* We don't report these */
10367 if (asoc->idata_supported) {
10368 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10369 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10371 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10372 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10374 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10376 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10377 ovh = SCTP_MIN_OVERHEAD;
10379 ovh = SCTP_MIN_V4_OVERHEAD;
10381 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10382 /* trim to a mtu size */
10383 cnt_of_space = asoc->smallest_mtu - ovh;
10385 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10386 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10387 0xff, 0, cnt_of_skipped,
10388 asoc->advanced_peer_ack_point);
10390 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10391 if (cnt_of_space < space_needed) {
10393 * ok we must trim down the chunk by lowering the
10394 * advance peer ack point.
10396 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10397 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10398 0xff, 0xff, cnt_of_space,
10401 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10402 if (asoc->idata_supported) {
10403 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10405 cnt_of_skipped /= sizeof(struct sctp_strseq);
10408 * Go through and find the TSN that will be the one
10411 at = TAILQ_FIRST(&asoc->sent_queue);
10413 for (i = 0; i < cnt_of_skipped; i++) {
10414 tp1 = TAILQ_NEXT(at, sctp_next);
10421 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10422 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10423 0xff, cnt_of_skipped, at->rec.data.tsn,
10424 asoc->advanced_peer_ack_point);
10428 * last now points to last one I can report, update
10432 advance_peer_ack_point = last->rec.data.tsn;
10434 if (asoc->idata_supported) {
10435 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10436 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10438 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10439 cnt_of_skipped * sizeof(struct sctp_strseq);
10442 chk->send_size = space_needed;
10443 /* Setup the chunk */
10444 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10445 fwdtsn->ch.chunk_length = htons(chk->send_size);
10446 fwdtsn->ch.chunk_flags = 0;
10447 if (asoc->idata_supported) {
10448 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10450 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10452 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10453 SCTP_BUF_LEN(chk->data) = chk->send_size;
10456 * Move pointer to after the fwdtsn and transfer to the
10459 if (asoc->idata_supported) {
10460 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10463 strseq = (struct sctp_strseq *)fwdtsn;
10467 * Now populate the strseq list. This is done blindly
10468 * without pulling out duplicate stream info. This is
10469 * inefficent but won't harm the process since the peer will
10470 * look at these in sequence and will thus release anything.
10471 * It could mean we exceed the PMTU and chop off some that
10472 * we could have included.. but this is unlikely (aka 1432/4
10473 * would mean 300+ stream seq's would have to be reported in
10474 * one FWD-TSN. With a bit of work we can later FIX this to
10475 * optimize and pull out duplicates.. but it does add more
10476 * overhead. So for now... not!
10479 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10480 if (i >= cnt_of_skipped) {
10483 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10484 /* We don't report these */
10487 if (at->rec.data.tsn == advance_peer_ack_point) {
10488 at->rec.data.fwd_tsn_cnt = 0;
10490 if (asoc->idata_supported) {
10491 strseq_m->sid = htons(at->rec.data.sid);
10492 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10493 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10495 strseq_m->flags = 0;
10497 strseq_m->mid = htonl(at->rec.data.mid);
10500 strseq->sid = htons(at->rec.data.sid);
10501 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10510 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10511 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10517 * Queue up a SACK or NR-SACK in the control queue.
10518 * We must first check to see if a SACK or NR-SACK is
10519 * somehow on the control queue.
10520 * If so, we will take and and remove the old one.
10522 struct sctp_association *asoc;
10523 struct sctp_tmit_chunk *chk, *a_chk;
10524 struct sctp_sack_chunk *sack;
10525 struct sctp_nr_sack_chunk *nr_sack;
10526 struct sctp_gap_ack_block *gap_descriptor;
10527 const struct sack_track *selector;
10532 int limit_reached = 0;
10533 unsigned int i, siz, j;
10534 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10537 uint32_t highest_tsn;
10542 if (stcb->asoc.nrsack_supported == 1) {
10543 type = SCTP_NR_SELECTIVE_ACK;
10545 type = SCTP_SELECTIVE_ACK;
10548 asoc = &stcb->asoc;
10549 SCTP_TCB_LOCK_ASSERT(stcb);
10550 if (asoc->last_data_chunk_from == NULL) {
10551 /* Hmm we never received anything */
10554 sctp_slide_mapping_arrays(stcb);
10555 sctp_set_rwnd(stcb, asoc);
10556 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10557 if (chk->rec.chunk_id.id == type) {
10558 /* Hmm, found a sack already on queue, remove it */
10559 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10560 asoc->ctrl_queue_cnt--;
10563 sctp_m_freem(a_chk->data);
10564 a_chk->data = NULL;
10566 if (a_chk->whoTo) {
10567 sctp_free_remote_addr(a_chk->whoTo);
10568 a_chk->whoTo = NULL;
10573 if (a_chk == NULL) {
10574 sctp_alloc_a_chunk(stcb, a_chk);
10575 if (a_chk == NULL) {
10576 /* No memory so we drop the idea, and set a timer */
10577 if (stcb->asoc.delayed_ack) {
10578 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10579 stcb->sctp_ep, stcb, NULL,
10580 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10581 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10582 stcb->sctp_ep, stcb, NULL);
10584 stcb->asoc.send_sack = 1;
10588 a_chk->copy_by_ref = 0;
10589 a_chk->rec.chunk_id.id = type;
10590 a_chk->rec.chunk_id.can_take_data = 1;
10592 /* Clear our pkt counts */
10593 asoc->data_pkts_seen = 0;
10596 a_chk->asoc = asoc;
10597 a_chk->snd_count = 0;
10598 a_chk->send_size = 0; /* fill in later */
10599 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10600 a_chk->whoTo = NULL;
10602 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10604 * Ok, the destination for the SACK is unreachable, lets see if
10605 * we can select an alternate to asoc->last_data_chunk_from
10607 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10608 if (a_chk->whoTo == NULL) {
10609 /* Nope, no alternate */
10610 a_chk->whoTo = asoc->last_data_chunk_from;
10613 a_chk->whoTo = asoc->last_data_chunk_from;
10615 if (a_chk->whoTo) {
10616 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10618 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10619 highest_tsn = asoc->highest_tsn_inside_map;
10621 highest_tsn = asoc->highest_tsn_inside_nr_map;
10623 if (highest_tsn == asoc->cumulative_tsn) {
10625 if (type == SCTP_SELECTIVE_ACK) {
10626 space_req = sizeof(struct sctp_sack_chunk);
10628 space_req = sizeof(struct sctp_nr_sack_chunk);
10631 /* gaps get a cluster */
10632 space_req = MCLBYTES;
10634 /* Ok now lets formulate a MBUF with our sack */
10635 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10636 if ((a_chk->data == NULL) ||
10637 (a_chk->whoTo == NULL)) {
10638 /* rats, no mbuf memory */
10640 /* was a problem with the destination */
10641 sctp_m_freem(a_chk->data);
10642 a_chk->data = NULL;
10644 sctp_free_a_chunk(stcb, a_chk, so_locked);
10645 /* sa_ignore NO_NULL_CHK */
10646 if (stcb->asoc.delayed_ack) {
10647 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10648 stcb->sctp_ep, stcb, NULL,
10649 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10650 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10651 stcb->sctp_ep, stcb, NULL);
10653 stcb->asoc.send_sack = 1;
10657 /* ok, lets go through and fill it in */
10658 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10659 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10660 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10661 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10663 limit = mtod(a_chk->data, caddr_t);
10668 if ((asoc->sctp_cmt_on_off > 0) &&
10669 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10671 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10672 * received, then set high bit to 1, else 0. Reset
10675 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10676 asoc->cmt_dac_pkts_rcvd = 0;
10678 #ifdef SCTP_ASOCLOG_OF_TSNS
10679 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10680 stcb->asoc.cumack_log_atsnt++;
10681 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10682 stcb->asoc.cumack_log_atsnt = 0;
10685 /* reset the readers interpretation */
10686 stcb->freed_by_sorcv_sincelast = 0;
10688 if (type == SCTP_SELECTIVE_ACK) {
10689 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10691 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10692 if (highest_tsn > asoc->mapping_array_base_tsn) {
10693 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10695 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10699 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10700 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10701 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10702 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10704 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10708 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10711 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10713 if (((type == SCTP_SELECTIVE_ACK) &&
10714 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10715 ((type == SCTP_NR_SELECTIVE_ACK) &&
10716 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10717 /* we have a gap .. maybe */
10718 for (i = 0; i < siz; i++) {
10719 tsn_map = asoc->mapping_array[i];
10720 if (type == SCTP_SELECTIVE_ACK) {
10721 tsn_map |= asoc->nr_mapping_array[i];
10725 * Clear all bits corresponding to TSNs
10726 * smaller or equal to the cumulative TSN.
10728 tsn_map &= (~0U << (1 - offset));
10730 selector = &sack_array[tsn_map];
10731 if (mergeable && selector->right_edge) {
10733 * Backup, left and right edges were ok to
10739 if (selector->num_entries == 0)
10742 for (j = 0; j < selector->num_entries; j++) {
10743 if (mergeable && selector->right_edge) {
10745 * do a merge by NOT setting
10751 * no merge, set the left
10755 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10757 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10760 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10766 if (selector->left_edge) {
10770 if (limit_reached) {
10771 /* Reached the limit stop */
10777 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10778 (limit_reached == 0)) {
10782 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10783 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10785 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10788 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10791 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10793 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10794 /* we have a gap .. maybe */
10795 for (i = 0; i < siz; i++) {
10796 tsn_map = asoc->nr_mapping_array[i];
10799 * Clear all bits corresponding to
10800 * TSNs smaller or equal to the
10803 tsn_map &= (~0U << (1 - offset));
10805 selector = &sack_array[tsn_map];
10806 if (mergeable && selector->right_edge) {
10808 * Backup, left and right edges were
10811 num_nr_gap_blocks--;
10814 if (selector->num_entries == 0)
10817 for (j = 0; j < selector->num_entries; j++) {
10818 if (mergeable && selector->right_edge) {
10820 * do a merge by NOT
10827 * no merge, set the
10831 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10833 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10834 num_nr_gap_blocks++;
10836 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10842 if (selector->left_edge) {
10846 if (limit_reached) {
10847 /* Reached the limit stop */
10854 /* now we must add any dups we are going to report. */
10855 if ((limit_reached == 0) && (asoc->numduptsns)) {
10856 dup = (uint32_t *)gap_descriptor;
10857 for (i = 0; i < asoc->numduptsns; i++) {
10858 *dup = htonl(asoc->dup_tsns[i]);
10861 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10866 asoc->numduptsns = 0;
10869 * now that the chunk is prepared queue it to the control chunk
10872 if (type == SCTP_SELECTIVE_ACK) {
10873 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10874 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10875 num_dups * sizeof(int32_t));
10876 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10877 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10878 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10879 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10880 sack->sack.num_dup_tsns = htons(num_dups);
10881 sack->ch.chunk_type = type;
10882 sack->ch.chunk_flags = flags;
10883 sack->ch.chunk_length = htons(a_chk->send_size);
10885 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10886 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10887 num_dups * sizeof(int32_t));
10888 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10889 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10890 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10891 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10892 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10893 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10894 nr_sack->nr_sack.reserved = 0;
10895 nr_sack->ch.chunk_type = type;
10896 nr_sack->ch.chunk_flags = flags;
10897 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10899 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10900 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10901 asoc->ctrl_queue_cnt++;
10902 asoc->send_sack = 0;
10903 SCTP_STAT_INCR(sctps_sendsacks);
10908 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10909 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10914 struct mbuf *m_abort, *m, *m_last;
10915 struct mbuf *m_out, *m_end = NULL;
10916 struct sctp_abort_chunk *abort;
10917 struct sctp_auth_chunk *auth = NULL;
10918 struct sctp_nets *net;
10920 uint32_t auth_offset = 0;
10922 uint16_t cause_len, chunk_len, padding_len;
10924 SCTP_TCB_LOCK_ASSERT(stcb);
10926 * Add an AUTH chunk, if chunk requires it and save the offset into
10927 * the chain for AUTH
10929 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10930 stcb->asoc.peer_auth_chunks)) {
10931 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10932 stcb, SCTP_ABORT_ASSOCIATION);
10933 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10937 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10938 if (m_abort == NULL) {
10940 sctp_m_freem(m_out);
10943 sctp_m_freem(operr);
10947 /* link in any error */
10948 SCTP_BUF_NEXT(m_abort) = operr;
10951 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10952 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10953 if (SCTP_BUF_NEXT(m) == NULL) {
10957 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10958 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10959 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10960 if (m_out == NULL) {
10961 /* NO Auth chunk prepended, so reserve space in front */
10962 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10965 /* Put AUTH chunk at the front of the chain */
10966 SCTP_BUF_NEXT(m_end) = m_abort;
10968 if (stcb->asoc.alternate) {
10969 net = stcb->asoc.alternate;
10971 net = stcb->asoc.primary_destination;
10973 /* Fill in the ABORT chunk header. */
10974 abort = mtod(m_abort, struct sctp_abort_chunk *);
10975 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10976 if (stcb->asoc.peer_vtag == 0) {
10977 /* This happens iff the assoc is in COOKIE-WAIT state. */
10978 vtag = stcb->asoc.my_vtag;
10979 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10981 vtag = stcb->asoc.peer_vtag;
10982 abort->ch.chunk_flags = 0;
10984 abort->ch.chunk_length = htons(chunk_len);
10985 /* Add padding, if necessary. */
10986 if (padding_len > 0) {
10987 if ((m_last == NULL) ||
10988 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10989 sctp_m_freem(m_out);
10993 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10994 (struct sockaddr *)&net->ro._l_addr,
10995 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10996 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10997 stcb->asoc.primary_destination->port, NULL,
11000 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11001 if (error == ENOBUFS) {
11002 stcb->asoc.ifp_had_enobuf = 1;
11003 SCTP_STAT_INCR(sctps_lowlevelerr);
11006 stcb->asoc.ifp_had_enobuf = 0;
11008 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11012 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11013 struct sctp_nets *net,
11016 /* formulate and SEND a SHUTDOWN-COMPLETE */
11017 struct mbuf *m_shutdown_comp;
11018 struct sctp_shutdown_complete_chunk *shutdown_complete;
11023 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11024 if (m_shutdown_comp == NULL) {
11028 if (reflect_vtag) {
11029 flags = SCTP_HAD_NO_TCB;
11030 vtag = stcb->asoc.my_vtag;
11033 vtag = stcb->asoc.peer_vtag;
11035 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11036 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11037 shutdown_complete->ch.chunk_flags = flags;
11038 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11039 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11040 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11041 (struct sockaddr *)&net->ro._l_addr,
11042 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11043 stcb->sctp_ep->sctp_lport, stcb->rport,
11047 SCTP_SO_NOT_LOCKED))) {
11048 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11049 if (error == ENOBUFS) {
11050 stcb->asoc.ifp_had_enobuf = 1;
11051 SCTP_STAT_INCR(sctps_lowlevelerr);
11054 stcb->asoc.ifp_had_enobuf = 0;
11056 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11061 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11062 struct sctphdr *sh, uint32_t vtag,
11063 uint8_t type, struct mbuf *cause,
11064 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11065 uint32_t vrf_id, uint16_t port)
11067 struct mbuf *o_pak;
11069 struct sctphdr *shout;
11070 struct sctp_chunkhdr *ch;
11071 #if defined(INET) || defined(INET6)
11072 struct udphdr *udp;
11074 int ret, len, cause_len, padding_len;
11076 struct sockaddr_in *src_sin, *dst_sin;
11080 struct sockaddr_in6 *src_sin6, *dst_sin6;
11081 struct ip6_hdr *ip6;
11084 /* Compute the length of the cause and add final padding. */
11086 if (cause != NULL) {
11087 struct mbuf *m_at, *m_last = NULL;
11089 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11090 if (SCTP_BUF_NEXT(m_at) == NULL)
11092 cause_len += SCTP_BUF_LEN(m_at);
11094 padding_len = cause_len % 4;
11095 if (padding_len != 0) {
11096 padding_len = 4 - padding_len;
11098 if (padding_len != 0) {
11099 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11100 sctp_m_freem(cause);
11107 /* Get an mbuf for the header. */
11108 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11109 switch (dst->sa_family) {
11112 len += sizeof(struct ip);
11117 len += sizeof(struct ip6_hdr);
11123 #if defined(INET) || defined(INET6)
11125 len += sizeof(struct udphdr);
11128 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11129 if (mout == NULL) {
11131 sctp_m_freem(cause);
11135 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11136 SCTP_BUF_LEN(mout) = len;
11137 SCTP_BUF_NEXT(mout) = cause;
11138 M_SETFIB(mout, fibnum);
11139 mout->m_pkthdr.flowid = mflowid;
11140 M_HASHTYPE_SET(mout, mflowtype);
11147 switch (dst->sa_family) {
11150 src_sin = (struct sockaddr_in *)src;
11151 dst_sin = (struct sockaddr_in *)dst;
11152 ip = mtod(mout, struct ip *);
11153 ip->ip_v = IPVERSION;
11154 ip->ip_hl = (sizeof(struct ip) >> 2);
11156 ip->ip_off = htons(IP_DF);
11158 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11160 ip->ip_p = IPPROTO_UDP;
11162 ip->ip_p = IPPROTO_SCTP;
11164 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11165 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11167 len = sizeof(struct ip);
11168 shout = (struct sctphdr *)((caddr_t)ip + len);
11173 src_sin6 = (struct sockaddr_in6 *)src;
11174 dst_sin6 = (struct sockaddr_in6 *)dst;
11175 ip6 = mtod(mout, struct ip6_hdr *);
11176 ip6->ip6_flow = htonl(0x60000000);
11177 if (V_ip6_auto_flowlabel) {
11178 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11180 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11182 ip6->ip6_nxt = IPPROTO_UDP;
11184 ip6->ip6_nxt = IPPROTO_SCTP;
11186 ip6->ip6_src = dst_sin6->sin6_addr;
11187 ip6->ip6_dst = src_sin6->sin6_addr;
11188 len = sizeof(struct ip6_hdr);
11189 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11194 shout = mtod(mout, struct sctphdr *);
11197 #if defined(INET) || defined(INET6)
11199 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11200 sctp_m_freem(mout);
11203 udp = (struct udphdr *)shout;
11204 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11205 udp->uh_dport = port;
11207 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11208 sizeof(struct sctphdr) +
11209 sizeof(struct sctp_chunkhdr) +
11210 cause_len + padding_len));
11211 len += sizeof(struct udphdr);
11212 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11217 shout->src_port = sh->dest_port;
11218 shout->dest_port = sh->src_port;
11219 shout->checksum = 0;
11221 shout->v_tag = htonl(vtag);
11223 shout->v_tag = sh->v_tag;
11225 len += sizeof(struct sctphdr);
11226 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11227 ch->chunk_type = type;
11229 ch->chunk_flags = 0;
11231 ch->chunk_flags = SCTP_HAD_NO_TCB;
11233 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11234 len += sizeof(struct sctp_chunkhdr);
11235 len += cause_len + padding_len;
11237 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11238 sctp_m_freem(mout);
11241 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11242 switch (dst->sa_family) {
11247 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11252 ip->ip_len = htons(len);
11254 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11255 SCTP_STAT_INCR(sctps_sendswcrc);
11257 SCTP_ENABLE_UDP_CSUM(o_pak);
11260 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11261 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11262 SCTP_STAT_INCR(sctps_sendhwcrc);
11264 #ifdef SCTP_PACKET_LOGGING
11265 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11266 sctp_packet_log(o_pak);
11269 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11270 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11275 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11277 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11278 SCTP_STAT_INCR(sctps_sendswcrc);
11279 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11280 udp->uh_sum = 0xffff;
11283 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11284 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11285 SCTP_STAT_INCR(sctps_sendhwcrc);
11287 #ifdef SCTP_PACKET_LOGGING
11288 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11289 sctp_packet_log(o_pak);
11292 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11293 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11297 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11299 sctp_m_freem(mout);
11300 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11303 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11305 UDPSTAT_INC(udps_opackets);
11307 SCTP_STAT_INCR(sctps_sendpackets);
11308 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11309 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11311 SCTP_STAT_INCR(sctps_senderrors);
11317 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11318 struct sctphdr *sh,
11319 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11320 uint32_t vrf_id, uint16_t port)
11322 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11323 mflowtype, mflowid, fibnum,
11328 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11329 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11334 struct sctp_tmit_chunk *chk;
11335 struct sctp_heartbeat_chunk *hb;
11336 struct timeval now;
11338 SCTP_TCB_LOCK_ASSERT(stcb);
11342 (void)SCTP_GETTIME_TIMEVAL(&now);
11343 switch (net->ro._l_addr.sa.sa_family) {
11355 sctp_alloc_a_chunk(stcb, chk);
11357 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11361 chk->copy_by_ref = 0;
11362 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11363 chk->rec.chunk_id.can_take_data = 1;
11365 chk->asoc = &stcb->asoc;
11366 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11368 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11369 if (chk->data == NULL) {
11370 sctp_free_a_chunk(stcb, chk, so_locked);
11373 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11374 SCTP_BUF_LEN(chk->data) = chk->send_size;
11375 chk->sent = SCTP_DATAGRAM_UNSENT;
11376 chk->snd_count = 0;
11378 atomic_add_int(&chk->whoTo->ref_count, 1);
11379 /* Now we have a mbuf that we can fill in with the details */
11380 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11381 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11382 /* fill out chunk header */
11383 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11384 hb->ch.chunk_flags = 0;
11385 hb->ch.chunk_length = htons(chk->send_size);
11386 /* Fill out hb parameter */
11387 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11388 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11389 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11390 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11391 /* Did our user request this one, put it in */
11392 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11393 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11394 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11396 * we only take from the entropy pool if the address is not
11399 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11400 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11402 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11403 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11405 switch (net->ro._l_addr.sa.sa_family) {
11408 memcpy(hb->heartbeat.hb_info.address,
11409 &net->ro._l_addr.sin.sin_addr,
11410 sizeof(net->ro._l_addr.sin.sin_addr));
11415 memcpy(hb->heartbeat.hb_info.address,
11416 &net->ro._l_addr.sin6.sin6_addr,
11417 sizeof(net->ro._l_addr.sin6.sin6_addr));
11422 sctp_m_freem(chk->data);
11425 sctp_free_a_chunk(stcb, chk, so_locked);
11429 net->hb_responded = 0;
11430 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11431 stcb->asoc.ctrl_queue_cnt++;
11432 SCTP_STAT_INCR(sctps_sendheartbeat);
11437 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11440 struct sctp_association *asoc;
11441 struct sctp_ecne_chunk *ecne;
11442 struct sctp_tmit_chunk *chk;
11447 asoc = &stcb->asoc;
11448 SCTP_TCB_LOCK_ASSERT(stcb);
11449 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11450 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11451 /* found a previous ECN_ECHO update it if needed */
11452 uint32_t cnt, ctsn;
11454 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11455 ctsn = ntohl(ecne->tsn);
11456 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11457 ecne->tsn = htonl(high_tsn);
11458 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11460 cnt = ntohl(ecne->num_pkts_since_cwr);
11462 ecne->num_pkts_since_cwr = htonl(cnt);
11466 /* nope could not find one to update so we must build one */
11467 sctp_alloc_a_chunk(stcb, chk);
11471 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11472 chk->copy_by_ref = 0;
11473 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11474 chk->rec.chunk_id.can_take_data = 0;
11476 chk->asoc = &stcb->asoc;
11477 chk->send_size = sizeof(struct sctp_ecne_chunk);
11478 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11479 if (chk->data == NULL) {
11480 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11483 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11484 SCTP_BUF_LEN(chk->data) = chk->send_size;
11485 chk->sent = SCTP_DATAGRAM_UNSENT;
11486 chk->snd_count = 0;
11488 atomic_add_int(&chk->whoTo->ref_count, 1);
11490 stcb->asoc.ecn_echo_cnt_onq++;
11491 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11492 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11493 ecne->ch.chunk_flags = 0;
11494 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11495 ecne->tsn = htonl(high_tsn);
11496 ecne->num_pkts_since_cwr = htonl(1);
11497 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11498 asoc->ctrl_queue_cnt++;
11502 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11503 struct mbuf *m, int len, int iphlen, int bad_crc)
11505 struct sctp_association *asoc;
11506 struct sctp_pktdrop_chunk *drp;
11507 struct sctp_tmit_chunk *chk;
11513 struct sctp_chunkhdr *ch, chunk_buf;
11514 unsigned int chk_length;
11519 asoc = &stcb->asoc;
11520 SCTP_TCB_LOCK_ASSERT(stcb);
11521 if (asoc->pktdrop_supported == 0) {
11523 * peer must declare support before I send one.
11527 if (stcb->sctp_socket == NULL) {
11530 sctp_alloc_a_chunk(stcb, chk);
11534 chk->copy_by_ref = 0;
11535 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11536 chk->rec.chunk_id.can_take_data = 1;
11539 chk->send_size = len;
11540 /* Validate that we do not have an ABORT in here. */
11541 offset = iphlen + sizeof(struct sctphdr);
11542 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11543 sizeof(*ch), (uint8_t *)&chunk_buf);
11544 while (ch != NULL) {
11545 chk_length = ntohs(ch->chunk_length);
11546 if (chk_length < sizeof(*ch)) {
11547 /* break to abort land */
11550 switch (ch->chunk_type) {
11551 case SCTP_PACKET_DROPPED:
11552 case SCTP_ABORT_ASSOCIATION:
11553 case SCTP_INITIATION_ACK:
11555 * We don't respond with an PKT-DROP to an ABORT
11556 * or PKT-DROP. We also do not respond to an
11557 * INIT-ACK, because we can't know if the initiation
11558 * tag is correct or not.
11560 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11565 offset += SCTP_SIZE32(chk_length);
11566 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11567 sizeof(*ch), (uint8_t *)&chunk_buf);
11570 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11571 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11573 * only send 1 mtu worth, trim off the excess on the end.
11576 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11579 chk->asoc = &stcb->asoc;
11580 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11581 if (chk->data == NULL) {
11583 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11586 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11587 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11589 sctp_m_freem(chk->data);
11593 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11594 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11595 chk->book_size_scale = 0;
11597 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11598 drp->trunc_len = htons(fullsz);
11600 * Len is already adjusted to size minus overhead above take
11601 * out the pkt_drop chunk itself from it.
11603 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11604 len = chk->send_size;
11606 /* no truncation needed */
11607 drp->ch.chunk_flags = 0;
11608 drp->trunc_len = htons(0);
11611 drp->ch.chunk_flags |= SCTP_BADCRC;
11613 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11614 SCTP_BUF_LEN(chk->data) = chk->send_size;
11615 chk->sent = SCTP_DATAGRAM_UNSENT;
11616 chk->snd_count = 0;
11618 /* we should hit here */
11620 atomic_add_int(&chk->whoTo->ref_count, 1);
11624 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11625 drp->ch.chunk_length = htons(chk->send_size);
11626 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11630 drp->bottle_bw = htonl(spc);
11631 if (asoc->my_rwnd) {
11632 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11633 asoc->size_on_all_streams +
11634 asoc->my_rwnd_control_len +
11635 stcb->sctp_socket->so_rcv.sb_cc);
11638 * If my rwnd is 0, possibly from mbuf depletion as well as
11639 * space used, tell the peer there is NO space aka onq == bw
11641 drp->current_onq = htonl(spc);
11645 m_copydata(m, iphlen, len, (caddr_t)datap);
11646 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11647 asoc->ctrl_queue_cnt++;
11651 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11653 struct sctp_association *asoc;
11654 struct sctp_cwr_chunk *cwr;
11655 struct sctp_tmit_chunk *chk;
11657 SCTP_TCB_LOCK_ASSERT(stcb);
11661 asoc = &stcb->asoc;
11662 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11663 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11665 * found a previous CWR queued to same destination
11666 * update it if needed
11670 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11671 ctsn = ntohl(cwr->tsn);
11672 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11673 cwr->tsn = htonl(high_tsn);
11675 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11676 /* Make sure override is carried */
11677 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11682 sctp_alloc_a_chunk(stcb, chk);
11686 chk->copy_by_ref = 0;
11687 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11688 chk->rec.chunk_id.can_take_data = 1;
11690 chk->asoc = &stcb->asoc;
11691 chk->send_size = sizeof(struct sctp_cwr_chunk);
11692 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11693 if (chk->data == NULL) {
11694 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11697 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11698 SCTP_BUF_LEN(chk->data) = chk->send_size;
11699 chk->sent = SCTP_DATAGRAM_UNSENT;
11700 chk->snd_count = 0;
11702 atomic_add_int(&chk->whoTo->ref_count, 1);
11703 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11704 cwr->ch.chunk_type = SCTP_ECN_CWR;
11705 cwr->ch.chunk_flags = override;
11706 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11707 cwr->tsn = htonl(high_tsn);
11708 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11709 asoc->ctrl_queue_cnt++;
11713 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11714 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11716 uint16_t len, old_len, i;
11717 struct sctp_stream_reset_out_request *req_out;
11718 struct sctp_chunkhdr *ch;
11720 int number_entries = 0;
11722 ch = mtod(chk->data, struct sctp_chunkhdr *);
11723 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11724 /* get to new offset for the param. */
11725 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11726 /* now how long will this param be? */
11727 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11728 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11729 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11730 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11734 if (number_entries == 0) {
11737 if (number_entries == stcb->asoc.streamoutcnt) {
11738 number_entries = 0;
11740 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11741 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11743 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11744 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11745 req_out->ph.param_length = htons(len);
11746 req_out->request_seq = htonl(seq);
11747 req_out->response_seq = htonl(resp_seq);
11748 req_out->send_reset_at_tsn = htonl(last_sent);
11750 if (number_entries) {
11751 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11752 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11753 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11754 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11755 req_out->list_of_streams[at] = htons(i);
11757 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11758 if (at >= number_entries) {
11764 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11765 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11768 if (SCTP_SIZE32(len) > len) {
11770 * Need to worry about the pad we may end up adding to the
11771 * end. This is easy since the struct is either aligned to 4
11772 * bytes or 2 bytes off.
11774 req_out->list_of_streams[number_entries] = 0;
11776 /* now fix the chunk length */
11777 ch->chunk_length = htons(len + old_len);
11778 chk->book_size = len + old_len;
11779 chk->book_size_scale = 0;
11780 chk->send_size = SCTP_SIZE32(chk->book_size);
11781 SCTP_BUF_LEN(chk->data) = chk->send_size;
11786 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11787 int number_entries, uint16_t *list,
11790 uint16_t len, old_len, i;
11791 struct sctp_stream_reset_in_request *req_in;
11792 struct sctp_chunkhdr *ch;
11794 ch = mtod(chk->data, struct sctp_chunkhdr *);
11795 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11797 /* get to new offset for the param. */
11798 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11799 /* now how long will this param be? */
11800 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11801 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11802 req_in->ph.param_length = htons(len);
11803 req_in->request_seq = htonl(seq);
11804 if (number_entries) {
11805 for (i = 0; i < number_entries; i++) {
11806 req_in->list_of_streams[i] = htons(list[i]);
11809 if (SCTP_SIZE32(len) > len) {
11811 * Need to worry about the pad we may end up adding to the
11812 * end. This is easy since the struct is either aligned to 4
11813 * bytes or 2 bytes off.
11815 req_in->list_of_streams[number_entries] = 0;
11817 /* now fix the chunk length */
11818 ch->chunk_length = htons(len + old_len);
11819 chk->book_size = len + old_len;
11820 chk->book_size_scale = 0;
11821 chk->send_size = SCTP_SIZE32(chk->book_size);
11822 SCTP_BUF_LEN(chk->data) = chk->send_size;
11827 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11830 uint16_t len, old_len;
11831 struct sctp_stream_reset_tsn_request *req_tsn;
11832 struct sctp_chunkhdr *ch;
11834 ch = mtod(chk->data, struct sctp_chunkhdr *);
11835 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11837 /* get to new offset for the param. */
11838 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11839 /* now how long will this param be? */
11840 len = sizeof(struct sctp_stream_reset_tsn_request);
11841 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11842 req_tsn->ph.param_length = htons(len);
11843 req_tsn->request_seq = htonl(seq);
11845 /* now fix the chunk length */
11846 ch->chunk_length = htons(len + old_len);
11847 chk->send_size = len + old_len;
11848 chk->book_size = SCTP_SIZE32(chk->send_size);
11849 chk->book_size_scale = 0;
11850 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11855 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11856 uint32_t resp_seq, uint32_t result)
11858 uint16_t len, old_len;
11859 struct sctp_stream_reset_response *resp;
11860 struct sctp_chunkhdr *ch;
11862 ch = mtod(chk->data, struct sctp_chunkhdr *);
11863 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11865 /* get to new offset for the param. */
11866 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11867 /* now how long will this param be? */
11868 len = sizeof(struct sctp_stream_reset_response);
11869 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11870 resp->ph.param_length = htons(len);
11871 resp->response_seq = htonl(resp_seq);
11872 resp->result = ntohl(result);
11874 /* now fix the chunk length */
11875 ch->chunk_length = htons(len + old_len);
11876 chk->book_size = len + old_len;
11877 chk->book_size_scale = 0;
11878 chk->send_size = SCTP_SIZE32(chk->book_size);
11879 SCTP_BUF_LEN(chk->data) = chk->send_size;
11884 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11885 struct sctp_stream_reset_list *ent,
11888 struct sctp_association *asoc;
11889 struct sctp_tmit_chunk *chk;
11890 struct sctp_chunkhdr *ch;
11892 asoc = &stcb->asoc;
11895 * Reset our last reset action to the new one IP -> response
11896 * (PERFORMED probably). This assures that if we fail to send, a
11897 * retran from the peer will get the new response.
11899 asoc->last_reset_action[0] = response;
11900 if (asoc->stream_reset_outstanding) {
11903 sctp_alloc_a_chunk(stcb, chk);
11905 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11908 chk->copy_by_ref = 0;
11909 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11910 chk->rec.chunk_id.can_take_data = 0;
11912 chk->asoc = &stcb->asoc;
11913 chk->book_size = sizeof(struct sctp_chunkhdr);
11914 chk->send_size = SCTP_SIZE32(chk->book_size);
11915 chk->book_size_scale = 0;
11916 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11917 if (chk->data == NULL) {
11918 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11919 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11922 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11923 /* setup chunk parameters */
11924 chk->sent = SCTP_DATAGRAM_UNSENT;
11925 chk->snd_count = 0;
11926 if (stcb->asoc.alternate) {
11927 chk->whoTo = stcb->asoc.alternate;
11929 chk->whoTo = stcb->asoc.primary_destination;
11931 ch = mtod(chk->data, struct sctp_chunkhdr *);
11932 ch->chunk_type = SCTP_STREAM_RESET;
11933 ch->chunk_flags = 0;
11934 ch->chunk_length = htons(chk->book_size);
11935 atomic_add_int(&chk->whoTo->ref_count, 1);
11936 SCTP_BUF_LEN(chk->data) = chk->send_size;
11937 sctp_add_stream_reset_result(chk, ent->seq, response);
11938 /* insert the chunk for sending */
11939 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11942 asoc->ctrl_queue_cnt++;
11946 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11947 uint32_t resp_seq, uint32_t result,
11948 uint32_t send_una, uint32_t recv_next)
11950 uint16_t len, old_len;
11951 struct sctp_stream_reset_response_tsn *resp;
11952 struct sctp_chunkhdr *ch;
11954 ch = mtod(chk->data, struct sctp_chunkhdr *);
11955 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11957 /* get to new offset for the param. */
11958 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11959 /* now how long will this param be? */
11960 len = sizeof(struct sctp_stream_reset_response_tsn);
11961 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11962 resp->ph.param_length = htons(len);
11963 resp->response_seq = htonl(resp_seq);
11964 resp->result = htonl(result);
11965 resp->senders_next_tsn = htonl(send_una);
11966 resp->receivers_next_tsn = htonl(recv_next);
11968 /* now fix the chunk length */
11969 ch->chunk_length = htons(len + old_len);
11970 chk->book_size = len + old_len;
11971 chk->send_size = SCTP_SIZE32(chk->book_size);
11972 chk->book_size_scale = 0;
11973 SCTP_BUF_LEN(chk->data) = chk->send_size;
11978 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11982 uint16_t len, old_len;
11983 struct sctp_chunkhdr *ch;
11984 struct sctp_stream_reset_add_strm *addstr;
11986 ch = mtod(chk->data, struct sctp_chunkhdr *);
11987 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11989 /* get to new offset for the param. */
11990 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11991 /* now how long will this param be? */
11992 len = sizeof(struct sctp_stream_reset_add_strm);
11995 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11996 addstr->ph.param_length = htons(len);
11997 addstr->request_seq = htonl(seq);
11998 addstr->number_of_streams = htons(adding);
11999 addstr->reserved = 0;
12001 /* now fix the chunk length */
12002 ch->chunk_length = htons(len + old_len);
12003 chk->send_size = len + old_len;
12004 chk->book_size = SCTP_SIZE32(chk->send_size);
12005 chk->book_size_scale = 0;
12006 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12011 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
12015 uint16_t len, old_len;
12016 struct sctp_chunkhdr *ch;
12017 struct sctp_stream_reset_add_strm *addstr;
12019 ch = mtod(chk->data, struct sctp_chunkhdr *);
12020 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12022 /* get to new offset for the param. */
12023 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12024 /* now how long will this param be? */
12025 len = sizeof(struct sctp_stream_reset_add_strm);
12027 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12028 addstr->ph.param_length = htons(len);
12029 addstr->request_seq = htonl(seq);
12030 addstr->number_of_streams = htons(adding);
12031 addstr->reserved = 0;
12033 /* now fix the chunk length */
12034 ch->chunk_length = htons(len + old_len);
12035 chk->send_size = len + old_len;
12036 chk->book_size = SCTP_SIZE32(chk->send_size);
12037 chk->book_size_scale = 0;
12038 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12043 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12045 struct sctp_association *asoc;
12046 struct sctp_tmit_chunk *chk;
12047 struct sctp_chunkhdr *ch;
12050 asoc = &stcb->asoc;
12051 asoc->trigger_reset = 0;
12052 if (asoc->stream_reset_outstanding) {
12055 sctp_alloc_a_chunk(stcb, chk);
12057 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12060 chk->copy_by_ref = 0;
12061 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12062 chk->rec.chunk_id.can_take_data = 0;
12064 chk->asoc = &stcb->asoc;
12065 chk->book_size = sizeof(struct sctp_chunkhdr);
12066 chk->send_size = SCTP_SIZE32(chk->book_size);
12067 chk->book_size_scale = 0;
12068 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12069 if (chk->data == NULL) {
12070 sctp_free_a_chunk(stcb, chk, so_locked);
12071 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12074 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12076 /* setup chunk parameters */
12077 chk->sent = SCTP_DATAGRAM_UNSENT;
12078 chk->snd_count = 0;
12079 if (stcb->asoc.alternate) {
12080 chk->whoTo = stcb->asoc.alternate;
12082 chk->whoTo = stcb->asoc.primary_destination;
12084 ch = mtod(chk->data, struct sctp_chunkhdr *);
12085 ch->chunk_type = SCTP_STREAM_RESET;
12086 ch->chunk_flags = 0;
12087 ch->chunk_length = htons(chk->book_size);
12088 atomic_add_int(&chk->whoTo->ref_count, 1);
12089 SCTP_BUF_LEN(chk->data) = chk->send_size;
12090 seq = stcb->asoc.str_reset_seq_out;
12091 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12093 asoc->stream_reset_outstanding++;
12095 m_freem(chk->data);
12097 sctp_free_a_chunk(stcb, chk, so_locked);
12100 asoc->str_reset = chk;
12101 /* insert the chunk for sending */
12102 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12105 asoc->ctrl_queue_cnt++;
12107 if (stcb->asoc.send_sack) {
12108 sctp_send_sack(stcb, so_locked);
12110 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12115 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12116 uint16_t number_entries, uint16_t *list,
12117 uint8_t send_in_req,
12118 uint8_t send_tsn_req,
12119 uint8_t add_stream,
12121 uint16_t adding_i, uint8_t peer_asked)
12123 struct sctp_association *asoc;
12124 struct sctp_tmit_chunk *chk;
12125 struct sctp_chunkhdr *ch;
12126 int can_send_out_req = 0;
12129 asoc = &stcb->asoc;
12130 if (asoc->stream_reset_outstanding) {
12132 * Already one pending, must get ACK back to clear the flag.
12134 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12137 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12138 (add_stream == 0)) {
12139 /* nothing to do */
12140 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12143 if (send_tsn_req && send_in_req) {
12144 /* error, can't do that */
12145 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12147 } else if (send_in_req) {
12148 can_send_out_req = 1;
12150 if (number_entries > (MCLBYTES -
12151 SCTP_MIN_OVERHEAD -
12152 sizeof(struct sctp_chunkhdr) -
12153 sizeof(struct sctp_stream_reset_out_request)) /
12154 sizeof(uint16_t)) {
12155 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12158 sctp_alloc_a_chunk(stcb, chk);
12160 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12163 chk->copy_by_ref = 0;
12164 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12165 chk->rec.chunk_id.can_take_data = 0;
12167 chk->asoc = &stcb->asoc;
12168 chk->book_size = sizeof(struct sctp_chunkhdr);
12169 chk->send_size = SCTP_SIZE32(chk->book_size);
12170 chk->book_size_scale = 0;
12171 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12172 if (chk->data == NULL) {
12173 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12174 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12177 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12179 /* setup chunk parameters */
12180 chk->sent = SCTP_DATAGRAM_UNSENT;
12181 chk->snd_count = 0;
12182 if (stcb->asoc.alternate) {
12183 chk->whoTo = stcb->asoc.alternate;
12185 chk->whoTo = stcb->asoc.primary_destination;
12187 atomic_add_int(&chk->whoTo->ref_count, 1);
12188 ch = mtod(chk->data, struct sctp_chunkhdr *);
12189 ch->chunk_type = SCTP_STREAM_RESET;
12190 ch->chunk_flags = 0;
12191 ch->chunk_length = htons(chk->book_size);
12192 SCTP_BUF_LEN(chk->data) = chk->send_size;
12194 seq = stcb->asoc.str_reset_seq_out;
12195 if (can_send_out_req) {
12198 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12201 asoc->stream_reset_outstanding++;
12204 if ((add_stream & 1) &&
12205 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12206 /* Need to allocate more */
12207 struct sctp_stream_out *oldstream;
12208 struct sctp_stream_queue_pending *sp, *nsp;
12210 #if defined(SCTP_DETAILED_STR_STATS)
12214 oldstream = stcb->asoc.strmout;
12215 /* get some more */
12216 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12217 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12219 if (stcb->asoc.strmout == NULL) {
12222 stcb->asoc.strmout = oldstream;
12223 /* Turn off the bit */
12224 x = add_stream & 0xfe;
12229 * Ok now we proceed with copying the old out stuff and
12230 * initializing the new stuff.
12232 SCTP_TCB_SEND_LOCK(stcb);
12233 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12234 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12235 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12236 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12237 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12238 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12239 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12240 stcb->asoc.strmout[i].sid = i;
12241 stcb->asoc.strmout[i].state = oldstream[i].state;
12242 /* FIX ME FIX ME */
12244 * This should be a SS_COPY operation FIX ME STREAM
12247 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12248 /* now anything on those queues? */
12249 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12250 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12251 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12255 /* now the new streams */
12256 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12257 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12258 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12259 stcb->asoc.strmout[i].chunks_on_queues = 0;
12260 #if defined(SCTP_DETAILED_STR_STATS)
12261 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12262 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12263 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12266 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12267 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12269 stcb->asoc.strmout[i].next_mid_ordered = 0;
12270 stcb->asoc.strmout[i].next_mid_unordered = 0;
12271 stcb->asoc.strmout[i].sid = i;
12272 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12273 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12274 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12276 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12277 SCTP_FREE(oldstream, SCTP_M_STRMO);
12278 SCTP_TCB_SEND_UNLOCK(stcb);
12281 if ((add_stream & 1) && (adding_o > 0)) {
12282 asoc->strm_pending_add_size = adding_o;
12283 asoc->peer_req_out = peer_asked;
12284 sctp_add_an_out_stream(chk, seq, adding_o);
12286 asoc->stream_reset_outstanding++;
12288 if ((add_stream & 2) && (adding_i > 0)) {
12289 sctp_add_an_in_stream(chk, seq, adding_i);
12291 asoc->stream_reset_outstanding++;
12294 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12296 asoc->stream_reset_outstanding++;
12298 if (send_tsn_req) {
12299 sctp_add_stream_reset_tsn(chk, seq);
12300 asoc->stream_reset_outstanding++;
12302 asoc->str_reset = chk;
12303 /* insert the chunk for sending */
12304 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12307 asoc->ctrl_queue_cnt++;
12308 if (stcb->asoc.send_sack) {
12309 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12311 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12316 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12317 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12318 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12319 uint32_t vrf_id, uint16_t port)
12321 /* Don't respond to an ABORT with an ABORT. */
12322 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12324 sctp_m_freem(cause);
12327 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12328 mflowtype, mflowid, fibnum,
12334 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12335 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12336 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12337 uint32_t vrf_id, uint16_t port)
12339 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12340 mflowtype, mflowid, fibnum,
12345 static struct mbuf *
12346 sctp_copy_resume(struct uio *uio,
12348 int user_marks_eor,
12351 struct mbuf **new_tail)
12355 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12356 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12358 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12361 *sndout = m_length(m, NULL);
12362 *new_tail = m_last(m);
12368 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12372 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12374 if (sp->data == NULL) {
12375 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12379 sp->tail_mbuf = m_last(sp->data);
12385 static struct sctp_stream_queue_pending *
12386 sctp_copy_it_in(struct sctp_tcb *stcb,
12387 struct sctp_association *asoc,
12388 struct sctp_sndrcvinfo *srcv,
12390 struct sctp_nets *net,
12391 ssize_t max_send_len,
12392 int user_marks_eor,
12397 * This routine must be very careful in its work. Protocol
12398 * processing is up and running so care must be taken to spl...()
12399 * when you need to do something that may effect the stcb/asoc. The
12400 * sb is locked however. When data is copied the protocol processing
12401 * should be enabled since this is a slower operation...
12403 struct sctp_stream_queue_pending *sp = NULL;
12407 /* Now can we send this? */
12408 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12409 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12410 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12411 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12412 /* got data while shutting down */
12413 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12414 *error = ECONNRESET;
12417 sctp_alloc_a_strmoq(stcb, sp);
12419 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12424 sp->sender_all_done = 0;
12425 sp->sinfo_flags = srcv->sinfo_flags;
12426 sp->timetolive = srcv->sinfo_timetolive;
12427 sp->ppid = srcv->sinfo_ppid;
12428 sp->context = srcv->sinfo_context;
12430 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12432 sp->sid = srcv->sinfo_stream;
12433 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12434 if ((sp->length == (uint32_t)uio->uio_resid) &&
12435 ((user_marks_eor == 0) ||
12436 (srcv->sinfo_flags & SCTP_EOF) ||
12437 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12438 sp->msg_is_complete = 1;
12440 sp->msg_is_complete = 0;
12442 sp->sender_all_done = 0;
12443 sp->some_taken = 0;
12444 sp->put_last_out = 0;
12445 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12446 sp->data = sp->tail_mbuf = NULL;
12447 if (sp->length == 0) {
12450 if (srcv->sinfo_keynumber_valid) {
12451 sp->auth_keyid = srcv->sinfo_keynumber;
12453 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12455 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12456 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12457 sp->holds_key_ref = 1;
12459 *error = sctp_copy_one(sp, uio, resv_in_first);
12462 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12465 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12467 atomic_add_int(&sp->net->ref_count, 1);
12471 sctp_set_prsctp_policy(sp);
12479 sctp_sosend(struct socket *so,
12480 struct sockaddr *addr,
12483 struct mbuf *control,
12488 int error, use_sndinfo = 0;
12489 struct sctp_sndrcvinfo sndrcvninfo;
12490 struct sockaddr *addr_to_use;
12491 #if defined(INET) && defined(INET6)
12492 struct sockaddr_in sin;
12496 /* process cmsg snd/rcv info (maybe a assoc-id) */
12497 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12498 sizeof(sndrcvninfo))) {
12503 addr_to_use = addr;
12504 #if defined(INET) && defined(INET6)
12505 if ((addr) && (addr->sa_family == AF_INET6)) {
12506 struct sockaddr_in6 *sin6;
12508 sin6 = (struct sockaddr_in6 *)addr;
12509 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12510 in6_sin6_2_sin(&sin, sin6);
12511 addr_to_use = (struct sockaddr *)&sin;
12515 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12518 use_sndinfo ? &sndrcvninfo : NULL
12526 sctp_lower_sosend(struct socket *so,
12527 struct sockaddr *addr,
12529 struct mbuf *i_pak,
12530 struct mbuf *control,
12532 struct sctp_sndrcvinfo *srcv
12537 ssize_t sndlen = 0, max_len, local_add_more;
12539 struct mbuf *top = NULL;
12540 int queue_only = 0, queue_only_for_init = 0;
12541 int free_cnt_applied = 0;
12543 int now_filled = 0;
12544 unsigned int inqueue_bytes = 0;
12545 struct sctp_block_entry be;
12546 struct sctp_inpcb *inp;
12547 struct sctp_tcb *stcb = NULL;
12548 struct timeval now;
12549 struct sctp_nets *net;
12550 struct sctp_association *asoc;
12551 struct sctp_inpcb *t_inp;
12552 int user_marks_eor;
12553 int create_lock_applied = 0;
12554 int nagle_applies = 0;
12555 int some_on_control = 0;
12556 int got_all_of_the_send = 0;
12557 int hold_tcblock = 0;
12558 int non_blocking = 0;
12559 ssize_t local_soresv = 0;
12561 uint16_t sinfo_flags;
12562 sctp_assoc_t sinfo_assoc_id;
12569 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12571 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12574 SCTP_RELEASE_PKT(i_pak);
12578 if ((uio == NULL) && (i_pak == NULL)) {
12579 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12582 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12583 atomic_add_int(&inp->total_sends, 1);
12585 if (uio->uio_resid < 0) {
12586 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12589 sndlen = uio->uio_resid;
12591 top = SCTP_HEADER_TO_CHAIN(i_pak);
12592 sndlen = SCTP_HEADER_LEN(i_pak);
12594 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zu\n",
12597 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12598 SCTP_IS_LISTENING(inp)) {
12599 /* The listener can NOT send */
12600 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12605 * Pre-screen address, if one is given the sin-len
12606 * must be set correctly!
12609 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12611 switch (raddr->sa.sa_family) {
12614 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12615 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12619 port = raddr->sin.sin_port;
12624 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12625 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12629 port = raddr->sin6.sin6_port;
12633 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12634 error = EAFNOSUPPORT;
12641 sinfo_flags = srcv->sinfo_flags;
12642 sinfo_assoc_id = srcv->sinfo_assoc_id;
12643 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12644 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12645 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12649 if (srcv->sinfo_flags)
12650 SCTP_STAT_INCR(sctps_sends_with_flags);
12652 sinfo_flags = inp->def_send.sinfo_flags;
12653 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12655 if (flags & MSG_EOR) {
12656 sinfo_flags |= SCTP_EOR;
12658 if (flags & MSG_EOF) {
12659 sinfo_flags |= SCTP_EOF;
12661 if (sinfo_flags & SCTP_SENDALL) {
12662 /* its a sendall */
12663 error = sctp_sendall(inp, uio, top, srcv);
12667 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12668 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12672 /* now we must find the assoc */
12673 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12674 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12675 SCTP_INP_RLOCK(inp);
12676 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12678 SCTP_TCB_LOCK(stcb);
12681 SCTP_INP_RUNLOCK(inp);
12682 } else if (sinfo_assoc_id) {
12683 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12684 if (stcb != NULL) {
12689 * Since we did not use findep we must
12690 * increment it, and if we don't find a tcb
12693 SCTP_INP_WLOCK(inp);
12694 SCTP_INP_INCR_REF(inp);
12695 SCTP_INP_WUNLOCK(inp);
12696 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12697 if (stcb == NULL) {
12698 SCTP_INP_WLOCK(inp);
12699 SCTP_INP_DECR_REF(inp);
12700 SCTP_INP_WUNLOCK(inp);
12705 if ((stcb == NULL) && (addr)) {
12706 /* Possible implicit send? */
12707 SCTP_ASOC_CREATE_LOCK(inp);
12708 create_lock_applied = 1;
12709 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12710 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12711 /* Should I really unlock ? */
12712 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12717 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12718 (addr->sa_family == AF_INET6)) {
12719 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12723 SCTP_INP_WLOCK(inp);
12724 SCTP_INP_INCR_REF(inp);
12725 SCTP_INP_WUNLOCK(inp);
12726 /* With the lock applied look again */
12727 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12728 #if defined(INET) || defined(INET6)
12729 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12730 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12733 if (stcb == NULL) {
12734 SCTP_INP_WLOCK(inp);
12735 SCTP_INP_DECR_REF(inp);
12736 SCTP_INP_WUNLOCK(inp);
12743 if (t_inp != inp) {
12744 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12749 if (stcb == NULL) {
12750 if (addr == NULL) {
12751 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12755 /* We must go ahead and start the INIT process */
12758 if ((sinfo_flags & SCTP_ABORT) ||
12759 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12761 * User asks to abort a non-existant assoc,
12762 * or EOF a non-existant assoc with no data
12764 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12768 /* get an asoc/stcb struct */
12769 vrf_id = inp->def_vrf_id;
12771 if (create_lock_applied == 0) {
12772 panic("Error, should hold create lock and I don't?");
12775 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12776 inp->sctp_ep.pre_open_stream_count,
12779 SCTP_INITIALIZE_AUTH_PARAMS);
12780 if (stcb == NULL) {
12781 /* Error is setup for us in the call */
12784 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12785 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12787 * Set the connected flag so we can queue
12790 soisconnecting(so);
12793 if (create_lock_applied) {
12794 SCTP_ASOC_CREATE_UNLOCK(inp);
12795 create_lock_applied = 0;
12797 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12800 * Turn on queue only flag to prevent data from
12804 asoc = &stcb->asoc;
12805 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12806 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12809 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12810 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12811 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12817 /* out with the INIT */
12818 queue_only_for_init = 1;
12820 * we may want to dig in after this call and adjust the MTU
12821 * value. It defaulted to 1500 (constant) but the ro
12822 * structure may now have an update and thus we may need to
12823 * change it BEFORE we append the message.
12827 asoc = &stcb->asoc;
12828 if (srcv == NULL) {
12829 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12830 sinfo_flags = srcv->sinfo_flags;
12831 if (flags & MSG_EOR) {
12832 sinfo_flags |= SCTP_EOR;
12834 if (flags & MSG_EOF) {
12835 sinfo_flags |= SCTP_EOF;
12838 if (sinfo_flags & SCTP_ADDR_OVER) {
12840 net = sctp_findnet(stcb, addr);
12843 if ((net == NULL) ||
12844 ((port != 0) && (port != stcb->rport))) {
12845 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12850 if (stcb->asoc.alternate) {
12851 net = stcb->asoc.alternate;
12853 net = stcb->asoc.primary_destination;
12856 atomic_add_int(&stcb->total_sends, 1);
12857 /* Keep the stcb from being freed under our feet */
12858 atomic_add_int(&asoc->refcnt, 1);
12859 free_cnt_applied = 1;
12861 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12862 if (sndlen > (ssize_t)asoc->smallest_mtu) {
12863 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12868 if (SCTP_SO_IS_NBIO(so)
12869 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12873 /* would we block? */
12874 if (non_blocking) {
12877 if (hold_tcblock == 0) {
12878 SCTP_TCB_LOCK(stcb);
12881 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12882 if (user_marks_eor == 0) {
12887 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12888 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12889 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12890 if (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so))
12893 error = EWOULDBLOCK;
12896 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12897 SCTP_TCB_UNLOCK(stcb);
12900 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12902 local_soresv = sndlen;
12903 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12904 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12905 error = ECONNRESET;
12908 if (create_lock_applied) {
12909 SCTP_ASOC_CREATE_UNLOCK(inp);
12910 create_lock_applied = 0;
12912 /* Is the stream no. valid? */
12913 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12914 /* Invalid stream number */
12915 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12919 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12920 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12922 * Can't queue any data while stream reset is underway.
12924 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12929 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12932 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12933 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12936 /* we are now done with all control */
12938 sctp_m_freem(control);
12941 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12942 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12943 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12944 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12945 if (sinfo_flags & SCTP_ABORT) {
12948 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12949 error = ECONNRESET;
12953 /* Ok, we will attempt a msgsnd :> */
12955 p->td_ru.ru_msgsnd++;
12957 /* Are we aborting? */
12958 if (sinfo_flags & SCTP_ABORT) {
12960 ssize_t tot_demand, tot_out = 0, max_out;
12962 SCTP_STAT_INCR(sctps_sends_with_abort);
12963 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12964 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12965 /* It has to be up before we abort */
12966 /* how big is the user initiated abort? */
12967 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12971 if (hold_tcblock) {
12972 SCTP_TCB_UNLOCK(stcb);
12976 struct mbuf *cntm = NULL;
12978 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12980 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12981 tot_out += SCTP_BUF_LEN(cntm);
12985 /* Must fit in a MTU */
12987 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12988 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12990 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12994 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12997 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
13001 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
13002 max_out -= sizeof(struct sctp_abort_msg);
13003 if (tot_out > max_out) {
13007 struct sctp_paramhdr *ph;
13009 /* now move forward the data pointer */
13010 ph = mtod(mm, struct sctp_paramhdr *);
13011 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13012 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
13014 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
13016 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13019 * Here if we can't get his data we
13020 * still abort we just don't get to
13021 * send the users note :-0
13028 SCTP_BUF_NEXT(mm) = top;
13032 if (hold_tcblock == 0) {
13033 SCTP_TCB_LOCK(stcb);
13035 atomic_add_int(&stcb->asoc.refcnt, -1);
13036 free_cnt_applied = 0;
13037 /* release this lock, otherwise we hang on ourselves */
13038 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13039 /* now relock the stcb so everything is sane */
13043 * In this case top is already chained to mm avoid double
13044 * free, since we free it below if top != NULL and driver
13045 * would free it after sending the packet out
13052 /* Calculate the maximum we can send */
13053 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13054 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13055 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13059 if (hold_tcblock) {
13060 SCTP_TCB_UNLOCK(stcb);
13063 if (asoc->strmout == NULL) {
13064 /* huh? software error */
13065 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13070 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13071 if ((user_marks_eor == 0) &&
13072 (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13073 /* It will NEVER fit */
13074 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13078 if ((uio == NULL) && user_marks_eor) {
13080 * We do not support eeor mode for
13081 * sending with mbuf chains (like sendfile).
13083 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13088 if (user_marks_eor) {
13089 local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13092 * For non-eeor the whole message must fit in
13093 * the socket send buffer.
13095 local_add_more = sndlen;
13098 if (non_blocking) {
13099 goto skip_preblock;
13101 if (((max_len <= local_add_more) &&
13102 ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13104 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13105 /* No room right now ! */
13106 SOCKBUF_LOCK(&so->so_snd);
13107 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13108 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13109 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13110 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
13111 (unsigned int)SCTP_SB_LIMIT_SND(so),
13114 stcb->asoc.stream_queue_cnt,
13115 stcb->asoc.chunks_on_out_queue,
13116 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13117 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13118 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13121 stcb->block_entry = &be;
13122 error = sbwait(&so->so_snd);
13123 stcb->block_entry = NULL;
13124 if (error || so->so_error || be.error) {
13127 error = so->so_error;
13132 SOCKBUF_UNLOCK(&so->so_snd);
13135 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13136 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13137 asoc, stcb->asoc.total_output_queue_size);
13139 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13140 SOCKBUF_UNLOCK(&so->so_snd);
13143 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13145 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13146 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13150 SOCKBUF_UNLOCK(&so->so_snd);
13154 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13158 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13159 * case NOTE: uio will be null when top/mbuf is passed
13162 if (sinfo_flags & SCTP_EOF) {
13163 got_all_of_the_send = 1;
13166 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13172 struct sctp_stream_queue_pending *sp;
13173 struct sctp_stream_out *strm;
13176 SCTP_TCB_SEND_LOCK(stcb);
13177 if ((asoc->stream_locked) &&
13178 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13179 SCTP_TCB_SEND_UNLOCK(stcb);
13180 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13184 SCTP_TCB_SEND_UNLOCK(stcb);
13186 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13187 if (strm->last_msg_incomplete == 0) {
13189 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13193 SCTP_TCB_SEND_LOCK(stcb);
13194 if (sp->msg_is_complete) {
13195 strm->last_msg_incomplete = 0;
13196 asoc->stream_locked = 0;
13199 * Just got locked to this guy in case of an
13202 strm->last_msg_incomplete = 1;
13203 if (stcb->asoc.idata_supported == 0) {
13204 asoc->stream_locked = 1;
13205 asoc->stream_locked_on = srcv->sinfo_stream;
13207 sp->sender_all_done = 0;
13209 sctp_snd_sb_alloc(stcb, sp->length);
13210 atomic_add_int(&asoc->stream_queue_cnt, 1);
13211 if (sinfo_flags & SCTP_UNORDERED) {
13212 SCTP_STAT_INCR(sctps_sends_with_unord);
13214 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13215 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13216 SCTP_TCB_SEND_UNLOCK(stcb);
13218 SCTP_TCB_SEND_LOCK(stcb);
13219 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13220 SCTP_TCB_SEND_UNLOCK(stcb);
13222 /* ???? Huh ??? last msg is gone */
13224 panic("Warning: Last msg marked incomplete, yet nothing left?");
13226 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13227 strm->last_msg_incomplete = 0;
13233 while (uio->uio_resid > 0) {
13234 /* How much room do we have? */
13235 struct mbuf *new_tail, *mm;
13237 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13238 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13239 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13243 if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13244 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13245 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13248 if (hold_tcblock) {
13249 SCTP_TCB_UNLOCK(stcb);
13252 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13253 if ((mm == NULL) || error) {
13259 /* Update the mbuf and count */
13260 SCTP_TCB_SEND_LOCK(stcb);
13261 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13263 * we need to get out. Peer probably
13267 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13268 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13269 error = ECONNRESET;
13271 SCTP_TCB_SEND_UNLOCK(stcb);
13274 if (sp->tail_mbuf) {
13275 /* tack it to the end */
13276 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13277 sp->tail_mbuf = new_tail;
13279 /* A stolen mbuf */
13281 sp->tail_mbuf = new_tail;
13283 sctp_snd_sb_alloc(stcb, sndout);
13284 atomic_add_int(&sp->length, sndout);
13286 if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13287 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13290 /* Did we reach EOR? */
13291 if ((uio->uio_resid == 0) &&
13292 ((user_marks_eor == 0) ||
13293 (sinfo_flags & SCTP_EOF) ||
13294 (user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
13295 sp->msg_is_complete = 1;
13297 sp->msg_is_complete = 0;
13299 SCTP_TCB_SEND_UNLOCK(stcb);
13301 if (uio->uio_resid == 0) {
13306 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13308 * This is ugly but we must assure locking
13311 if (hold_tcblock == 0) {
13312 SCTP_TCB_LOCK(stcb);
13315 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13316 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13317 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13318 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13324 SCTP_TCB_UNLOCK(stcb);
13327 /* wait for space now */
13328 if (non_blocking) {
13329 /* Non-blocking io in place out */
13332 /* What about the INIT, send it maybe */
13333 if (queue_only_for_init) {
13334 if (hold_tcblock == 0) {
13335 SCTP_TCB_LOCK(stcb);
13338 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13339 /* a collision took us forward? */
13342 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13343 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13347 if ((net->flight_size > net->cwnd) &&
13348 (asoc->sctp_cmt_on_off == 0)) {
13349 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13351 } else if (asoc->ifp_had_enobuf) {
13352 SCTP_STAT_INCR(sctps_ifnomemqueued);
13353 if (net->flight_size > (2 * net->mtu)) {
13356 asoc->ifp_had_enobuf = 0;
13358 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13359 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13360 (stcb->asoc.total_flight > 0) &&
13361 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13362 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13365 * Ok, Nagle is set on and we have data outstanding.
13366 * Don't send anything and let SACKs drive out the
13367 * data unless we have a "full" segment to send.
13369 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13370 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13372 SCTP_STAT_INCR(sctps_naglequeued);
13375 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13376 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13377 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13379 SCTP_STAT_INCR(sctps_naglesent);
13382 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13384 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13385 nagle_applies, un_sent);
13386 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13387 stcb->asoc.total_flight,
13388 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13390 if (queue_only_for_init)
13391 queue_only_for_init = 0;
13392 if ((queue_only == 0) && (nagle_applies == 0)) {
13394 * need to start chunk output
13395 * before blocking.. note that if
13396 * a lock is already applied, then
13397 * the input via the net is happening
13398 * and I don't need to start output :-D
13400 if (hold_tcblock == 0) {
13401 if (SCTP_TCB_TRYLOCK(stcb)) {
13403 sctp_chunk_output(inp,
13405 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13408 sctp_chunk_output(inp,
13410 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13413 if (hold_tcblock == 1) {
13414 SCTP_TCB_UNLOCK(stcb);
13417 SOCKBUF_LOCK(&so->so_snd);
13419 * This is a bit strange, but I think it will
13420 * work. The total_output_queue_size is locked and
13421 * protected by the TCB_LOCK, which we just released.
13422 * There is a race that can occur between releasing it
13423 * above, and me getting the socket lock, where sacks
13424 * come in but we have not put the SB_WAIT on the
13425 * so_snd buffer to get the wakeup. After the LOCK
13426 * is applied the sack_processing will also need to
13427 * LOCK the so->so_snd to do the actual sowwakeup(). So
13428 * once we have the socket buffer lock if we recheck the
13429 * size we KNOW we will get to sleep safely with the
13430 * wakeup flag in place.
13432 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13433 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13434 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13435 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13436 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13437 asoc, uio->uio_resid);
13440 stcb->block_entry = &be;
13441 error = sbwait(&so->so_snd);
13442 stcb->block_entry = NULL;
13444 if (error || so->so_error || be.error) {
13447 error = so->so_error;
13452 SOCKBUF_UNLOCK(&so->so_snd);
13456 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13457 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13458 asoc, stcb->asoc.total_output_queue_size);
13461 SOCKBUF_UNLOCK(&so->so_snd);
13462 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13466 SCTP_TCB_SEND_LOCK(stcb);
13467 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13468 SCTP_TCB_SEND_UNLOCK(stcb);
13472 if (sp->msg_is_complete == 0) {
13473 strm->last_msg_incomplete = 1;
13474 if (stcb->asoc.idata_supported == 0) {
13475 asoc->stream_locked = 1;
13476 asoc->stream_locked_on = srcv->sinfo_stream;
13479 sp->sender_all_done = 1;
13480 strm->last_msg_incomplete = 0;
13481 asoc->stream_locked = 0;
13484 SCTP_PRINTF("Huh no sp TSNH?\n");
13485 strm->last_msg_incomplete = 0;
13486 asoc->stream_locked = 0;
13488 SCTP_TCB_SEND_UNLOCK(stcb);
13489 if (uio->uio_resid == 0) {
13490 got_all_of_the_send = 1;
13493 /* We send in a 0, since we do NOT have any locks */
13494 error = sctp_msg_append(stcb, net, top, srcv, 0);
13496 if (sinfo_flags & SCTP_EOF) {
13498 * This should only happen for Panda for the mbuf
13499 * send case, which does NOT yet support EEOR mode.
13500 * Thus, we can just set this flag to do the proper
13503 got_all_of_the_send = 1;
13511 if ((sinfo_flags & SCTP_EOF) &&
13512 (got_all_of_the_send == 1)) {
13513 SCTP_STAT_INCR(sctps_sends_with_eof);
13515 if (hold_tcblock == 0) {
13516 SCTP_TCB_LOCK(stcb);
13519 if (TAILQ_EMPTY(&asoc->send_queue) &&
13520 TAILQ_EMPTY(&asoc->sent_queue) &&
13521 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13522 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13525 /* there is nothing queued to send, so I'm done... */
13526 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13527 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13528 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13529 struct sctp_nets *netp;
13531 /* only send SHUTDOWN the first time through */
13532 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13533 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13535 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13536 sctp_stop_timers_for_shutdown(stcb);
13537 if (stcb->asoc.alternate) {
13538 netp = stcb->asoc.alternate;
13540 netp = stcb->asoc.primary_destination;
13542 sctp_send_shutdown(stcb, netp);
13543 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13545 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13546 asoc->primary_destination);
13550 * we still got (or just got) data to send, so set
13554 * XXX sockets draft says that SCTP_EOF should be
13555 * sent with no data. currently, we will allow user
13556 * data to be sent first and move to
13559 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13560 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13561 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13562 if (hold_tcblock == 0) {
13563 SCTP_TCB_LOCK(stcb);
13566 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13567 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13569 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13570 if (TAILQ_EMPTY(&asoc->send_queue) &&
13571 TAILQ_EMPTY(&asoc->sent_queue) &&
13572 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13573 struct mbuf *op_err;
13574 char msg[SCTP_DIAG_INFO_LEN];
13577 if (free_cnt_applied) {
13578 atomic_add_int(&stcb->asoc.refcnt, -1);
13579 free_cnt_applied = 0;
13581 snprintf(msg, sizeof(msg),
13582 "%s:%d at %s", __FILE__, __LINE__, __func__);
13583 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13585 sctp_abort_an_association(stcb->sctp_ep, stcb,
13586 op_err, SCTP_SO_LOCKED);
13588 * now relock the stcb so everything
13595 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13596 asoc->primary_destination);
13597 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13602 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13603 some_on_control = 1;
13605 if (queue_only_for_init) {
13606 if (hold_tcblock == 0) {
13607 SCTP_TCB_LOCK(stcb);
13610 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13611 /* a collision took us forward? */
13614 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13615 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13619 if ((net->flight_size > net->cwnd) &&
13620 (stcb->asoc.sctp_cmt_on_off == 0)) {
13621 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13623 } else if (asoc->ifp_had_enobuf) {
13624 SCTP_STAT_INCR(sctps_ifnomemqueued);
13625 if (net->flight_size > (2 * net->mtu)) {
13628 asoc->ifp_had_enobuf = 0;
13630 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13631 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13632 (stcb->asoc.total_flight > 0) &&
13633 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13634 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13636 * Ok, Nagle is set on and we have data outstanding.
13637 * Don't send anything and let SACKs drive out the
13638 * data unless wen have a "full" segment to send.
13640 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13641 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13643 SCTP_STAT_INCR(sctps_naglequeued);
13646 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13647 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13648 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13650 SCTP_STAT_INCR(sctps_naglesent);
13653 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13654 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13655 nagle_applies, un_sent);
13656 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13657 stcb->asoc.total_flight,
13658 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13660 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13661 /* we can attempt to send too. */
13662 if (hold_tcblock == 0) {
13664 * If there is activity recv'ing sacks no need to
13667 if (SCTP_TCB_TRYLOCK(stcb)) {
13668 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13672 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13674 } else if ((queue_only == 0) &&
13675 (stcb->asoc.peers_rwnd == 0) &&
13676 (stcb->asoc.total_flight == 0)) {
13677 /* We get to have a probe outstanding */
13678 if (hold_tcblock == 0) {
13680 SCTP_TCB_LOCK(stcb);
13682 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13683 } else if (some_on_control) {
13684 int num_out, reason, frag_point;
13686 /* Here we do control only */
13687 if (hold_tcblock == 0) {
13689 SCTP_TCB_LOCK(stcb);
13691 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13692 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13693 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13695 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13696 queue_only, stcb->asoc.peers_rwnd, un_sent,
13697 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13698 stcb->asoc.total_output_queue_size, error);
13703 if (local_soresv && stcb) {
13704 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13706 if (create_lock_applied) {
13707 SCTP_ASOC_CREATE_UNLOCK(inp);
13709 if ((stcb) && hold_tcblock) {
13710 SCTP_TCB_UNLOCK(stcb);
13712 if (stcb && free_cnt_applied) {
13713 atomic_add_int(&stcb->asoc.refcnt, -1);
13717 if (mtx_owned(&stcb->tcb_mtx)) {
13718 panic("Leaving with tcb mtx owned?");
13720 if (mtx_owned(&stcb->tcb_send_mtx)) {
13721 panic("Leaving with tcb send mtx owned?");
13729 sctp_m_freem(control);
13736 * generate an AUTHentication chunk, if required
13739 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13740 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13741 struct sctp_tcb *stcb, uint8_t chunk)
13743 struct mbuf *m_auth;
13744 struct sctp_auth_chunk *auth;
13748 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13752 if (stcb->asoc.auth_supported == 0) {
13755 /* does the requested chunk require auth? */
13756 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13759 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13760 if (m_auth == NULL) {
13764 /* reserve some space if this will be the first mbuf */
13766 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13767 /* fill in the AUTH chunk details */
13768 auth = mtod(m_auth, struct sctp_auth_chunk *);
13769 memset(auth, 0, sizeof(*auth));
13770 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13771 auth->ch.chunk_flags = 0;
13772 chunk_len = sizeof(*auth) +
13773 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13774 auth->ch.chunk_length = htons(chunk_len);
13775 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13776 /* key id and hmac digest will be computed and filled in upon send */
13778 /* save the offset where the auth was inserted into the chain */
13780 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13781 *offset += SCTP_BUF_LEN(cn);
13784 /* update length and return pointer to the auth chunk */
13785 SCTP_BUF_LEN(m_auth) = chunk_len;
13786 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13787 if (auth_ret != NULL)
13795 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13797 struct nd_prefix *pfx = NULL;
13798 struct nd_pfxrouter *pfxrtr = NULL;
13799 struct sockaddr_in6 gw6;
13801 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13804 /* get prefix entry of address */
13806 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13807 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13809 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13810 &src6->sin6_addr, &pfx->ndpr_mask))
13813 /* no prefix entry in the prefix list */
13816 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13817 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13821 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13822 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13824 /* search installed gateway from prefix entry */
13825 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13826 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13827 gw6.sin6_family = AF_INET6;
13828 gw6.sin6_len = sizeof(struct sockaddr_in6);
13829 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13830 sizeof(struct in6_addr));
13831 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13832 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13833 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13834 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13835 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13837 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13842 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13848 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13851 struct sockaddr_in *sin, *mask;
13852 struct ifaddr *ifa;
13853 struct in_addr srcnetaddr, gwnetaddr;
13855 if (ro == NULL || ro->ro_rt == NULL ||
13856 sifa->address.sa.sa_family != AF_INET) {
13859 ifa = (struct ifaddr *)sifa->ifa;
13860 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13861 sin = &sifa->address.sin;
13862 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13863 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13864 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13865 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13867 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13868 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13869 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13870 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13871 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13872 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {