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 in6pcb *)inp)->in6p_flowinfo);
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 in6pcb *)inp)->in6p_flowinfo) >> 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, *op_err;
4992 int at, limit, pad_needed;
4993 uint16_t ptype, plen, padded_size;
4996 *abort_processing = 0;
4999 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 /* We can NOT handle HOST NAME addresses!! */
5121 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5122 *abort_processing = 1;
5123 if (op_err == NULL) {
5124 /* Ok need to try to get a mbuf */
5126 l_len = SCTP_MIN_OVERHEAD;
5128 l_len = SCTP_MIN_V4_OVERHEAD;
5130 l_len += sizeof(struct sctp_chunkhdr);
5131 l_len += sizeof(struct sctp_gen_error_cause);
5132 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5134 SCTP_BUF_LEN(op_err) = 0;
5136 * Pre-reserve space for IP,
5137 * SCTP, and chunk header.
5140 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5142 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5144 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5145 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5149 /* If we have space */
5150 struct sctp_gen_error_cause cause;
5153 uint32_t cpthis = 0;
5155 pad_needed = 4 - (err_at % 4);
5156 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5157 err_at += pad_needed;
5159 cause.code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5160 cause.length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
5161 m_copyback(op_err, err_at, sizeof(struct sctp_gen_error_cause), (caddr_t)&cause);
5162 err_at += sizeof(struct sctp_gen_error_cause);
5163 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5164 if (SCTP_BUF_NEXT(op_err) == NULL) {
5165 sctp_m_freem(op_err);
5174 * we do not recognize the parameter figure out what
5177 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5178 if ((ptype & 0x4000) == 0x4000) {
5179 /* Report bit is set?? */
5180 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5181 if (op_err == NULL) {
5184 /* Ok need to try to get an mbuf */
5186 l_len = SCTP_MIN_OVERHEAD;
5188 l_len = SCTP_MIN_V4_OVERHEAD;
5190 l_len += sizeof(struct sctp_chunkhdr);
5191 l_len += sizeof(struct sctp_paramhdr);
5192 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5194 SCTP_BUF_LEN(op_err) = 0;
5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5198 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5200 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5201 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5205 /* If we have space */
5206 struct sctp_paramhdr s;
5209 uint32_t cpthis = 0;
5211 pad_needed = 4 - (err_at % 4);
5212 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5213 err_at += pad_needed;
5215 s.param_type = htons(SCTP_UNRECOG_PARAM);
5216 s.param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
5217 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)&s);
5218 err_at += sizeof(struct sctp_paramhdr);
5219 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5220 if (SCTP_BUF_NEXT(op_err) == NULL) {
5221 sctp_m_freem(op_err);
5223 * we are out of memory but
5224 * we still need to have a
5225 * look at what to do (the
5226 * system is in trouble
5230 goto more_processing;
5236 if ((ptype & 0x8000) == 0x0000) {
5237 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5240 /* skip this chunk and continue processing */
5241 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5242 at += SCTP_SIZE32(plen);
5247 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5251 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5252 *abort_processing = 1;
5253 if ((op_err == NULL) && phdr) {
5256 l_len = SCTP_MIN_OVERHEAD;
5258 l_len = SCTP_MIN_V4_OVERHEAD;
5260 l_len += sizeof(struct sctp_chunkhdr);
5261 l_len += (2 * sizeof(struct sctp_paramhdr));
5262 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5264 SCTP_BUF_LEN(op_err) = 0;
5266 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5270 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5271 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5274 if ((op_err) && phdr) {
5275 struct sctp_paramhdr s;
5278 uint32_t cpthis = 0;
5280 pad_needed = 4 - (err_at % 4);
5281 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5282 err_at += pad_needed;
5284 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5285 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5286 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5287 err_at += sizeof(s);
5288 /* Only copy back the p-hdr that caused the issue */
5289 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5295 sctp_are_there_new_addresses(struct sctp_association *asoc,
5296 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5299 * Given a INIT packet, look through the packet to verify that there
5300 * are NO new addresses. As we go through the parameters add reports
5301 * of any un-understood parameters that require an error. Also we
5302 * must return (1) to drop the packet if we see a un-understood
5303 * parameter that tells us to drop the chunk.
5305 struct sockaddr *sa_touse;
5306 struct sockaddr *sa;
5307 struct sctp_paramhdr *phdr, params;
5308 uint16_t ptype, plen;
5310 struct sctp_nets *net;
5313 struct sockaddr_in sin4, *sa4;
5316 struct sockaddr_in6 sin6, *sa6;
5320 memset(&sin4, 0, sizeof(sin4));
5321 sin4.sin_family = AF_INET;
5322 sin4.sin_len = sizeof(sin4);
5325 memset(&sin6, 0, sizeof(sin6));
5326 sin6.sin6_family = AF_INET6;
5327 sin6.sin6_len = sizeof(sin6);
5329 /* First what about the src address of the pkt ? */
5331 switch (src->sa_family) {
5334 if (asoc->scope.ipv4_addr_legal) {
5341 if (asoc->scope.ipv6_addr_legal) {
5352 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5353 sa = (struct sockaddr *)&net->ro._l_addr;
5354 if (sa->sa_family == src->sa_family) {
5356 if (sa->sa_family == AF_INET) {
5357 struct sockaddr_in *src4;
5359 sa4 = (struct sockaddr_in *)sa;
5360 src4 = (struct sockaddr_in *)src;
5361 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5368 if (sa->sa_family == AF_INET6) {
5369 struct sockaddr_in6 *src6;
5371 sa6 = (struct sockaddr_in6 *)sa;
5372 src6 = (struct sockaddr_in6 *)src;
5373 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5382 /* New address added! no need to look further. */
5386 /* Ok so far lets munge through the rest of the packet */
5387 offset += sizeof(struct sctp_init_chunk);
5388 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5391 ptype = ntohs(phdr->param_type);
5392 plen = ntohs(phdr->param_length);
5395 case SCTP_IPV4_ADDRESS:
5397 struct sctp_ipv4addr_param *p4, p4_buf;
5399 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5402 phdr = sctp_get_next_param(in_initpkt, offset,
5403 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5407 if (asoc->scope.ipv4_addr_legal) {
5408 p4 = (struct sctp_ipv4addr_param *)phdr;
5409 sin4.sin_addr.s_addr = p4->addr;
5410 sa_touse = (struct sockaddr *)&sin4;
5416 case SCTP_IPV6_ADDRESS:
5418 struct sctp_ipv6addr_param *p6, p6_buf;
5420 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5423 phdr = sctp_get_next_param(in_initpkt, offset,
5424 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5428 if (asoc->scope.ipv6_addr_legal) {
5429 p6 = (struct sctp_ipv6addr_param *)phdr;
5430 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5432 sa_touse = (struct sockaddr *)&sin6;
5442 /* ok, sa_touse points to one to check */
5444 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5445 sa = (struct sockaddr *)&net->ro._l_addr;
5446 if (sa->sa_family != sa_touse->sa_family) {
5450 if (sa->sa_family == AF_INET) {
5451 sa4 = (struct sockaddr_in *)sa;
5452 if (sa4->sin_addr.s_addr ==
5453 sin4.sin_addr.s_addr) {
5460 if (sa->sa_family == AF_INET6) {
5461 sa6 = (struct sockaddr_in6 *)sa;
5462 if (SCTP6_ARE_ADDR_EQUAL(
5471 /* New addr added! no need to look further */
5475 offset += SCTP_SIZE32(plen);
5476 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5482 * Given a MBUF chain that was sent into us containing an INIT. Build a
5483 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5484 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5485 * message (i.e. the struct sctp_init_msg).
5488 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5489 struct sctp_nets *src_net, struct mbuf *init_pkt,
5490 int iphlen, int offset,
5491 struct sockaddr *src, struct sockaddr *dst,
5492 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5493 uint8_t mflowtype, uint32_t mflowid,
5494 uint32_t vrf_id, uint16_t port)
5496 struct sctp_association *asoc;
5497 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5498 struct sctp_init_ack_chunk *initack;
5499 struct sctp_adaptation_layer_indication *ali;
5500 struct sctp_supported_chunk_types_param *pr_supported;
5501 struct sctp_paramhdr *ph;
5502 union sctp_sockstore *over_addr;
5503 struct sctp_scoping scp;
5506 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5507 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5508 struct sockaddr_in *sin;
5511 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5512 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5513 struct sockaddr_in6 *sin6;
5515 struct sockaddr *to;
5516 struct sctp_state_cookie stc;
5517 struct sctp_nets *net = NULL;
5518 uint8_t *signature = NULL;
5519 int cnt_inits_to = 0;
5520 uint16_t his_limit, i_want;
5522 int nat_friendly = 0;
5525 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5532 if ((asoc != NULL) &&
5533 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5534 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5536 * new addresses, out of here in non-cookie-wait
5539 * Send an ABORT, without the new address error
5540 * cause. This looks no different than if no
5541 * listener was present.
5543 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5545 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5546 mflowtype, mflowid, inp->fibnum,
5550 if (src_net != NULL && (src_net->port != port)) {
5552 * change of remote encapsulation port, out of here
5553 * in non-cookie-wait states
5555 * Send an ABORT, without an specific error cause.
5556 * This looks no different than if no listener was
5559 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5560 "Remote encapsulation port changed");
5561 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5562 mflowtype, mflowid, inp->fibnum,
5568 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5569 (offset + sizeof(struct sctp_init_chunk)),
5570 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5573 if (op_err == NULL) {
5574 char msg[SCTP_DIAG_INFO_LEN];
5576 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5577 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5580 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5581 init_chk->init.initiate_tag, op_err,
5582 mflowtype, mflowid, inp->fibnum,
5586 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5588 /* 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)
5782 net->src_addr_selected = 1;
5785 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5786 stc.laddress[1] = 0;
5787 stc.laddress[2] = 0;
5788 stc.laddress[3] = 0;
5789 stc.laddr_type = SCTP_IPV4_ADDRESS;
5790 /* scope_id is only for v6 */
5796 sin6 = (struct sockaddr_in6 *)to;
5797 memcpy(&stc.address, &sin6->sin6_addr,
5798 sizeof(struct in6_addr));
5799 stc.addr_type = SCTP_IPV6_ADDRESS;
5800 stc.scope_id = sin6->sin6_scope_id;
5801 if (net->src_addr_selected == 0) {
5803 * strange case here, the INIT should have
5804 * done the selection.
5806 net->ro._s_addr = sctp_source_address_selection(inp,
5807 stcb, (sctp_route_t *)&net->ro,
5809 if (net->ro._s_addr == NULL)
5812 net->src_addr_selected = 1;
5814 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5815 sizeof(struct in6_addr));
5816 stc.laddr_type = SCTP_IPV6_ADDRESS;
5821 /* Now lets put the SCTP header in place */
5822 initack = mtod(m, struct sctp_init_ack_chunk *);
5823 /* Save it off for quick ref */
5824 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5826 memcpy(stc.identification, SCTP_VERSION_STRING,
5827 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5828 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5829 /* now the chunk header */
5830 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5831 initack->ch.chunk_flags = 0;
5832 /* fill in later from mbuf we build */
5833 initack->ch.chunk_length = 0;
5834 /* place in my tag */
5835 if ((asoc != NULL) &&
5836 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5837 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5838 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5839 /* re-use the v-tags and init-seq here */
5840 initack->init.initiate_tag = htonl(asoc->my_vtag);
5841 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5843 uint32_t vtag, itsn;
5846 atomic_add_int(&asoc->refcnt, 1);
5847 SCTP_TCB_UNLOCK(stcb);
5849 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5850 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5852 * Got a duplicate vtag on some guy behind a
5853 * nat make sure we don't use it.
5857 initack->init.initiate_tag = htonl(vtag);
5858 /* get a TSN to use too */
5859 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5860 initack->init.initial_tsn = htonl(itsn);
5861 SCTP_TCB_LOCK(stcb);
5862 atomic_add_int(&asoc->refcnt, -1);
5864 SCTP_INP_INCR_REF(inp);
5865 SCTP_INP_RUNLOCK(inp);
5866 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5867 initack->init.initiate_tag = htonl(vtag);
5868 /* get a TSN to use too */
5869 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5870 SCTP_INP_RLOCK(inp);
5871 SCTP_INP_DECR_REF(inp);
5874 /* save away my tag to */
5875 stc.my_vtag = initack->init.initiate_tag;
5877 /* set up some of the credits. */
5878 so = inp->sctp_socket;
5880 /* memory problem */
5884 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5886 /* set what I want */
5887 his_limit = ntohs(init_chk->init.num_inbound_streams);
5888 /* choose what I want */
5890 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5891 i_want = asoc->streamoutcnt;
5893 i_want = asoc->pre_open_streams;
5896 i_want = inp->sctp_ep.pre_open_stream_count;
5898 if (his_limit < i_want) {
5899 /* I Want more :< */
5900 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5902 /* I can have what I want :> */
5903 initack->init.num_outbound_streams = htons(i_want);
5905 /* tell him his limit. */
5906 initack->init.num_inbound_streams =
5907 htons(inp->sctp_ep.max_open_streams_intome);
5909 /* adaptation layer indication parameter */
5910 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5911 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5912 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5913 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5914 ali->ph.param_length = htons(parameter_len);
5915 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5916 chunk_len += parameter_len;
5920 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5921 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5922 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5923 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5924 ph->param_type = htons(SCTP_ECN_CAPABLE);
5925 ph->param_length = htons(parameter_len);
5926 chunk_len += parameter_len;
5929 /* PR-SCTP supported parameter */
5930 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5931 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5932 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5933 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5934 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5935 ph->param_length = htons(parameter_len);
5936 chunk_len += parameter_len;
5939 /* Add NAT friendly parameter */
5941 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5942 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5943 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5944 ph->param_length = htons(parameter_len);
5945 chunk_len += parameter_len;
5948 /* And now tell the peer which extensions we support */
5950 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5951 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5952 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5953 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5954 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5955 ((asoc == NULL) && (inp->idata_supported == 1))) {
5956 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5959 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5960 ((asoc == NULL) && (inp->auth_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5963 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5964 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5965 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5966 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5968 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5969 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5970 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5972 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5973 ((asoc == NULL) && (inp->idata_supported == 1))) {
5974 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5976 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5977 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5978 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5980 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5981 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5982 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5985 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5986 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5987 pr_supported->ph.param_length = htons(parameter_len);
5988 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5989 chunk_len += parameter_len;
5992 /* add authentication parameters */
5993 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5994 ((asoc == NULL) && (inp->auth_supported == 1))) {
5995 struct sctp_auth_random *randp;
5996 struct sctp_auth_hmac_algo *hmacs;
5997 struct sctp_auth_chunk_list *chunks;
5999 if (padding_len > 0) {
6000 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6001 chunk_len += padding_len;
6004 /* generate and add RANDOM parameter */
6005 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6006 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
6007 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6008 randp->ph.param_type = htons(SCTP_RANDOM);
6009 randp->ph.param_length = htons(parameter_len);
6010 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6011 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6012 chunk_len += parameter_len;
6014 if (padding_len > 0) {
6015 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6016 chunk_len += padding_len;
6019 /* add HMAC_ALGO parameter */
6020 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6021 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6022 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6023 (uint8_t *)hmacs->hmac_ids);
6024 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6025 hmacs->ph.param_length = htons(parameter_len);
6026 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6027 chunk_len += parameter_len;
6029 if (padding_len > 0) {
6030 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6031 chunk_len += padding_len;
6034 /* add CHUNKS parameter */
6035 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6036 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6037 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6038 chunks->chunk_types);
6039 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6040 chunks->ph.param_length = htons(parameter_len);
6041 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6042 chunk_len += parameter_len;
6044 SCTP_BUF_LEN(m) = chunk_len;
6046 /* now the addresses */
6048 * To optimize this we could put the scoping stuff into a structure
6049 * and remove the individual uint8's from the stc structure. Then we
6050 * could just sifa in the address within the stc.. but for now this
6051 * is a quick hack to get the address stuff teased apart.
6053 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6054 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6055 scp.loopback_scope = stc.loopback_scope;
6056 scp.ipv4_local_scope = stc.ipv4_scope;
6057 scp.local_scope = stc.local_scope;
6058 scp.site_scope = stc.site_scope;
6059 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6061 &padding_len, &chunk_len);
6062 /* padding_len can only be positive, if no addresses have been added */
6063 if (padding_len > 0) {
6064 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6065 chunk_len += padding_len;
6066 SCTP_BUF_LEN(m) += padding_len;
6070 /* tack on the operational error if present */
6073 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6074 parameter_len += SCTP_BUF_LEN(m_tmp);
6076 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6077 SCTP_BUF_NEXT(m_last) = op_err;
6078 while (SCTP_BUF_NEXT(m_last) != NULL) {
6079 m_last = SCTP_BUF_NEXT(m_last);
6081 chunk_len += parameter_len;
6083 if (padding_len > 0) {
6084 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6085 if (m_last == NULL) {
6086 /* Houston we have a problem, no space */
6090 chunk_len += padding_len;
6093 /* Now we must build a cookie */
6094 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6095 if (m_cookie == NULL) {
6096 /* memory problem */
6100 /* Now append the cookie to the end and update the space/size */
6101 SCTP_BUF_NEXT(m_last) = m_cookie;
6103 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6104 parameter_len += SCTP_BUF_LEN(m_tmp);
6105 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6109 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6110 chunk_len += parameter_len;
6113 * Place in the size, but we don't include the last pad (if any) in
6116 initack->ch.chunk_length = htons(chunk_len);
6119 * Time to sign the cookie, we don't sign over the cookie signature
6120 * though thus we set trailer.
6122 (void)sctp_hmac_m(SCTP_HMAC,
6123 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6124 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6125 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6127 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6128 * here since the timer will drive a retranmission.
6130 if (padding_len > 0) {
6131 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6136 if (stc.loopback_scope) {
6137 over_addr = (union sctp_sockstore *)dst;
6142 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6144 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6147 SCTP_SO_NOT_LOCKED))) {
6148 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6149 if (error == ENOBUFS) {
6151 asoc->ifp_had_enobuf = 1;
6153 SCTP_STAT_INCR(sctps_lowlevelerr);
6157 asoc->ifp_had_enobuf = 0;
6160 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6165 sctp_prune_prsctp(struct sctp_tcb *stcb,
6166 struct sctp_association *asoc,
6167 struct sctp_sndrcvinfo *srcv,
6171 struct sctp_tmit_chunk *chk, *nchk;
6173 SCTP_TCB_LOCK_ASSERT(stcb);
6174 if ((asoc->prsctp_supported) &&
6175 (asoc->sent_queue_cnt_removeable > 0)) {
6176 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6178 * Look for chunks marked with the PR_SCTP flag AND
6179 * the buffer space flag. If the one being sent is
6180 * equal or greater priority then purge the old one
6181 * and free some space.
6183 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6185 * This one is PR-SCTP AND buffer space
6188 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6190 * Lower numbers equates to higher
6191 * priority so if the one we are
6192 * looking at has a larger or equal
6193 * priority we want to drop the data
6194 * and NOT retransmit it.
6198 * We release the book_size
6199 * if the mbuf is here
6204 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6208 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6211 freed_spc += ret_spc;
6212 if (freed_spc >= dataout) {
6215 } /* if chunk was present */
6216 } /* if of sufficient priority */
6217 } /* if chunk has enabled */
6218 } /* tailqforeach */
6220 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6221 /* Here we must move to the sent queue and mark */
6222 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6223 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6226 * We release the book_size
6227 * if the mbuf is here
6231 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6234 freed_spc += ret_spc;
6235 if (freed_spc >= dataout) {
6238 } /* end if chk->data */
6239 } /* end if right class */
6240 } /* end if chk pr-sctp */
6241 } /* tailqforeachsafe (chk) */
6242 } /* if enabled in asoc */
6246 sctp_get_frag_point(struct sctp_tcb *stcb,
6247 struct sctp_association *asoc)
6252 * For endpoints that have both v6 and v4 addresses we must reserve
6253 * room for the ipv6 header, for those that are only dealing with V4
6254 * we use a larger frag point.
6256 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6257 ovh = SCTP_MIN_OVERHEAD;
6259 ovh = SCTP_MIN_V4_OVERHEAD;
6261 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6262 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6263 siz = asoc->smallest_mtu - ovh;
6265 siz = (stcb->asoc.sctp_frag_point - ovh);
6267 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6269 /* A data chunk MUST fit in a cluster */
6270 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6273 /* adjust for an AUTH chunk if DATA requires auth */
6274 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6275 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6278 /* make it an even word boundary please */
6285 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6288 * We assume that the user wants PR_SCTP_TTL if the user provides a
6289 * positive lifetime but does not specify any PR_SCTP policy.
6291 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6292 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6293 } else if (sp->timetolive > 0) {
6294 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6295 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6299 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6300 case CHUNK_FLAGS_PR_SCTP_BUF:
6302 * Time to live is a priority stored in tv_sec when doing
6303 * the buffer drop thing.
6305 sp->ts.tv_sec = sp->timetolive;
6308 case CHUNK_FLAGS_PR_SCTP_TTL:
6312 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6313 tv.tv_sec = sp->timetolive / 1000;
6314 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6316 * TODO sctp_constants.h needs alternative time
6317 * macros when _KERNEL is undefined.
6319 timevaladd(&sp->ts, &tv);
6322 case CHUNK_FLAGS_PR_SCTP_RTX:
6324 * Time to live is a the number or retransmissions stored in
6327 sp->ts.tv_sec = sp->timetolive;
6331 SCTPDBG(SCTP_DEBUG_USRREQ1,
6332 "Unknown PR_SCTP policy %u.\n",
6333 PR_SCTP_POLICY(sp->sinfo_flags));
6339 sctp_msg_append(struct sctp_tcb *stcb,
6340 struct sctp_nets *net,
6342 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6346 struct sctp_stream_queue_pending *sp = NULL;
6347 struct sctp_stream_out *strm;
6350 * Given an mbuf chain, put it into the association send queue and
6351 * place it on the wheel
6353 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6354 /* Invalid stream number */
6355 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6359 if ((stcb->asoc.stream_locked) &&
6360 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6361 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6365 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6366 /* Now can we send this? */
6367 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6368 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6369 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6370 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6371 /* got data while shutting down */
6372 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6376 sctp_alloc_a_strmoq(stcb, sp);
6378 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6382 sp->sinfo_flags = srcv->sinfo_flags;
6383 sp->timetolive = srcv->sinfo_timetolive;
6384 sp->ppid = srcv->sinfo_ppid;
6385 sp->context = srcv->sinfo_context;
6387 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6389 atomic_add_int(&sp->net->ref_count, 1);
6393 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6394 sp->sid = srcv->sinfo_stream;
6395 sp->msg_is_complete = 1;
6396 sp->sender_all_done = 1;
6399 sp->tail_mbuf = NULL;
6400 sctp_set_prsctp_policy(sp);
6402 * We could in theory (for sendall) sifa the length in, but we would
6403 * still have to hunt through the chain since we need to setup the
6407 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6408 if (SCTP_BUF_NEXT(at) == NULL)
6410 sp->length += SCTP_BUF_LEN(at);
6412 if (srcv->sinfo_keynumber_valid) {
6413 sp->auth_keyid = srcv->sinfo_keynumber;
6415 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6417 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6418 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6419 sp->holds_key_ref = 1;
6421 if (hold_stcb_lock == 0) {
6422 SCTP_TCB_SEND_LOCK(stcb);
6424 sctp_snd_sb_alloc(stcb, sp->length);
6425 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6426 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6427 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6429 if (hold_stcb_lock == 0) {
6430 SCTP_TCB_SEND_UNLOCK(stcb);
6440 static struct mbuf *
6441 sctp_copy_mbufchain(struct mbuf *clonechain,
6442 struct mbuf *outchain,
6443 struct mbuf **endofchain,
6446 uint8_t copy_by_ref)
6449 struct mbuf *appendchain;
6453 if (endofchain == NULL) {
6457 sctp_m_freem(outchain);
6460 if (can_take_mbuf) {
6461 appendchain = clonechain;
6464 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6466 /* Its not in a cluster */
6467 if (*endofchain == NULL) {
6468 /* lets get a mbuf cluster */
6469 if (outchain == NULL) {
6470 /* This is the general case */
6472 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6473 if (outchain == NULL) {
6476 SCTP_BUF_LEN(outchain) = 0;
6477 *endofchain = outchain;
6478 /* get the prepend space */
6479 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6482 * We really should not get a NULL
6488 if (SCTP_BUF_NEXT(m) == NULL) {
6492 m = SCTP_BUF_NEXT(m);
6495 if (*endofchain == NULL) {
6497 * huh, TSNH XXX maybe we
6500 sctp_m_freem(outchain);
6504 /* get the new end of length */
6505 len = (int)M_TRAILINGSPACE(*endofchain);
6507 /* how much is left at the end? */
6508 len = (int)M_TRAILINGSPACE(*endofchain);
6510 /* Find the end of the data, for appending */
6511 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6513 /* Now lets copy it out */
6514 if (len >= sizeofcpy) {
6515 /* It all fits, copy it in */
6516 m_copydata(clonechain, 0, sizeofcpy, cp);
6517 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6519 /* fill up the end of the chain */
6521 m_copydata(clonechain, 0, len, cp);
6522 SCTP_BUF_LEN((*endofchain)) += len;
6523 /* now we need another one */
6526 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6531 SCTP_BUF_NEXT((*endofchain)) = m;
6533 cp = mtod((*endofchain), caddr_t);
6534 m_copydata(clonechain, len, sizeofcpy, cp);
6535 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6539 /* copy the old fashion way */
6540 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6541 #ifdef SCTP_MBUF_LOGGING
6542 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6543 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6548 if (appendchain == NULL) {
6551 sctp_m_freem(outchain);
6555 /* tack on to the end */
6556 if (*endofchain != NULL) {
6557 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6561 if (SCTP_BUF_NEXT(m) == NULL) {
6562 SCTP_BUF_NEXT(m) = appendchain;
6565 m = SCTP_BUF_NEXT(m);
6569 * save off the end and update the end-chain position
6573 if (SCTP_BUF_NEXT(m) == NULL) {
6577 m = SCTP_BUF_NEXT(m);
6581 /* save off the end and update the end-chain position */
6584 if (SCTP_BUF_NEXT(m) == NULL) {
6588 m = SCTP_BUF_NEXT(m);
6590 return (appendchain);
6595 sctp_med_chunk_output(struct sctp_inpcb *inp,
6596 struct sctp_tcb *stcb,
6597 struct sctp_association *asoc,
6600 int control_only, int from_where,
6601 struct timeval *now, int *now_filled, int frag_point, int so_locked
6602 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6608 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6609 uint32_t val SCTP_UNUSED)
6611 struct sctp_copy_all *ca;
6614 int added_control = 0;
6615 int un_sent, do_chunk_output = 1;
6616 struct sctp_association *asoc;
6617 struct sctp_nets *net;
6619 ca = (struct sctp_copy_all *)ptr;
6620 if (ca->m == NULL) {
6623 if (ca->inp != inp) {
6627 if (ca->sndlen > 0) {
6628 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6630 /* can't copy so we are done */
6634 #ifdef SCTP_MBUF_LOGGING
6635 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6636 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6642 SCTP_TCB_LOCK_ASSERT(stcb);
6643 if (stcb->asoc.alternate) {
6644 net = stcb->asoc.alternate;
6646 net = stcb->asoc.primary_destination;
6648 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6649 /* Abort this assoc with m as the user defined reason */
6651 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6653 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6654 0, M_NOWAIT, 1, MT_DATA);
6655 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6658 struct sctp_paramhdr *ph;
6660 ph = mtod(m, struct sctp_paramhdr *);
6661 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6662 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6665 * We add one here to keep the assoc from dis-appearing on
6668 atomic_add_int(&stcb->asoc.refcnt, 1);
6669 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6671 * sctp_abort_an_association calls sctp_free_asoc() free
6672 * association will NOT free it since we incremented the
6673 * refcnt .. we do this to prevent it being freed and things
6674 * getting tricky since we could end up (from free_asoc)
6675 * calling inpcb_free which would get a recursive lock call
6676 * to the iterator lock.. But as a consequence of that the
6677 * stcb will return to us un-locked.. since free_asoc
6678 * returns with either no TCB or the TCB unlocked, we must
6679 * relock.. to unlock in the iterator timer :-0
6681 SCTP_TCB_LOCK(stcb);
6682 atomic_add_int(&stcb->asoc.refcnt, -1);
6683 goto no_chunk_output;
6686 ret = sctp_msg_append(stcb, net, m,
6690 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6691 /* shutdown this assoc */
6692 if (TAILQ_EMPTY(&asoc->send_queue) &&
6693 TAILQ_EMPTY(&asoc->sent_queue) &&
6694 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6695 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6699 * there is nothing queued to send, so I'm
6702 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6703 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6704 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6706 * only send SHUTDOWN the first time
6709 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6710 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6712 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6713 sctp_stop_timers_for_shutdown(stcb);
6714 sctp_send_shutdown(stcb, net);
6715 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6717 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6718 asoc->primary_destination);
6720 do_chunk_output = 0;
6724 * we still got (or just got) data to send,
6725 * so set SHUTDOWN_PENDING
6728 * XXX sockets draft says that SCTP_EOF
6729 * should be sent with no data. currently,
6730 * we will allow user data to be sent first
6731 * and move to SHUTDOWN-PENDING
6733 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6734 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6735 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6736 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6737 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6739 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6740 if (TAILQ_EMPTY(&asoc->send_queue) &&
6741 TAILQ_EMPTY(&asoc->sent_queue) &&
6742 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6743 struct mbuf *op_err;
6744 char msg[SCTP_DIAG_INFO_LEN];
6747 snprintf(msg, sizeof(msg),
6748 "%s:%d at %s", __FILE__, __LINE__, __func__);
6749 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6751 atomic_add_int(&stcb->asoc.refcnt, 1);
6752 sctp_abort_an_association(stcb->sctp_ep, stcb,
6753 op_err, SCTP_SO_NOT_LOCKED);
6754 atomic_add_int(&stcb->asoc.refcnt, -1);
6755 goto no_chunk_output;
6757 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6758 asoc->primary_destination);
6764 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6765 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6767 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6768 (stcb->asoc.total_flight > 0) &&
6769 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6770 do_chunk_output = 0;
6772 if (do_chunk_output)
6773 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6774 else if (added_control) {
6775 int num_out, reason, now_filled = 0;
6779 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6780 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6781 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6792 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6794 struct sctp_copy_all *ca;
6796 ca = (struct sctp_copy_all *)ptr;
6798 * Do a notify here? Kacheong suggests that the notify be done at
6799 * the send time.. so you would push up a notification if any send
6800 * failed. Don't know if this is feasible since the only failures we
6801 * have is "memory" related and if you cannot get an mbuf to send
6802 * the data you surely can't get an mbuf to send up to notify the
6803 * user you can't send the data :->
6806 /* now free everything */
6808 /* Lets clear the flag to allow others to run. */
6809 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6811 sctp_m_freem(ca->m);
6812 SCTP_FREE(ca, SCTP_M_COPYAL);
6815 static struct mbuf *
6816 sctp_copy_out_all(struct uio *uio, ssize_t len)
6818 struct mbuf *ret, *at;
6819 ssize_t left, willcpy, cancpy, error;
6821 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6827 SCTP_BUF_LEN(ret) = 0;
6828 /* save space for the data chunk header */
6829 cancpy = (int)M_TRAILINGSPACE(ret);
6830 willcpy = min(cancpy, left);
6833 /* Align data to the end */
6834 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6840 SCTP_BUF_LEN(at) = (int)willcpy;
6841 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6844 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6845 if (SCTP_BUF_NEXT(at) == NULL) {
6848 at = SCTP_BUF_NEXT(at);
6849 SCTP_BUF_LEN(at) = 0;
6850 cancpy = (int)M_TRAILINGSPACE(at);
6851 willcpy = min(cancpy, left);
6858 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6859 struct sctp_sndrcvinfo *srcv)
6862 struct sctp_copy_all *ca;
6864 if (inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) {
6865 /* There is another. */
6868 if (uio->uio_resid > SCTP_MAX_SENDALL_LIMIT) {
6869 /* You must be less than the max! */
6872 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6879 memset(ca, 0, sizeof(struct sctp_copy_all));
6883 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6886 * take off the sendall flag, it would be bad if we failed to do
6889 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6890 /* get length and mbuf chain */
6892 ca->sndlen = uio->uio_resid;
6893 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6894 if (ca->m == NULL) {
6895 SCTP_FREE(ca, SCTP_M_COPYAL);
6896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6900 /* Gather the length of the send */
6904 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6905 ca->sndlen += SCTP_BUF_LEN(mat);
6908 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6909 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6910 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6911 SCTP_ASOC_ANY_STATE,
6913 sctp_sendall_completes, inp, 1);
6915 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6916 SCTP_FREE(ca, SCTP_M_COPYAL);
6917 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6925 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6927 struct sctp_tmit_chunk *chk, *nchk;
6929 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6930 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6931 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6932 asoc->ctrl_queue_cnt--;
6934 sctp_m_freem(chk->data);
6937 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6943 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6945 struct sctp_association *asoc;
6946 struct sctp_tmit_chunk *chk, *nchk;
6947 struct sctp_asconf_chunk *acp;
6950 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6951 /* find SCTP_ASCONF chunk in queue */
6952 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6954 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6955 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6960 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6961 asoc->ctrl_queue_cnt--;
6963 sctp_m_freem(chk->data);
6966 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6973 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6974 struct sctp_association *asoc,
6975 struct sctp_tmit_chunk **data_list,
6977 struct sctp_nets *net)
6980 struct sctp_tmit_chunk *tp1;
6982 for (i = 0; i < bundle_at; i++) {
6983 /* off of the send queue */
6984 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6985 asoc->send_queue_cnt--;
6988 * Any chunk NOT 0 you zap the time chunk 0 gets
6989 * zapped or set based on if a RTO measurment is
6992 data_list[i]->do_rtt = 0;
6995 data_list[i]->sent_rcv_time = net->last_sent_time;
6996 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6997 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6998 if (data_list[i]->whoTo == NULL) {
6999 data_list[i]->whoTo = net;
7000 atomic_add_int(&net->ref_count, 1);
7002 /* on to the sent queue */
7003 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
7004 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7005 struct sctp_tmit_chunk *tpp;
7007 /* need to move back */
7009 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
7011 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7015 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7018 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7020 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7025 /* This does not lower until the cum-ack passes it */
7026 asoc->sent_queue_cnt++;
7027 if ((asoc->peers_rwnd <= 0) &&
7028 (asoc->total_flight == 0) &&
7030 /* Mark the chunk as being a window probe */
7031 SCTP_STAT_INCR(sctps_windowprobed);
7033 #ifdef SCTP_AUDITING_ENABLED
7034 sctp_audit_log(0xC2, 3);
7036 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7037 data_list[i]->snd_count = 1;
7038 data_list[i]->rec.data.chunk_was_revoked = 0;
7039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7040 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7041 data_list[i]->whoTo->flight_size,
7042 data_list[i]->book_size,
7043 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7044 data_list[i]->rec.data.tsn);
7046 sctp_flight_size_increase(data_list[i]);
7047 sctp_total_flight_increase(stcb, data_list[i]);
7048 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7049 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7050 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7052 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7053 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7054 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7055 /* SWS sender side engages */
7056 asoc->peers_rwnd = 0;
7059 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7060 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7065 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7066 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7071 struct sctp_tmit_chunk *chk, *nchk;
7073 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7074 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7075 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7076 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7077 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7078 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7079 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7080 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7081 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7082 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7083 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7084 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7085 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7086 /* Stray chunks must be cleaned up */
7088 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7089 asoc->ctrl_queue_cnt--;
7091 sctp_m_freem(chk->data);
7094 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7095 asoc->fwd_tsn_cnt--;
7097 sctp_free_a_chunk(stcb, chk, so_locked);
7098 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7099 /* special handling, we must look into the param */
7100 if (chk != asoc->str_reset) {
7101 goto clean_up_anyway;
7108 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7109 uint32_t space_left, uint32_t frag_point, int eeor_on)
7112 * Make a decision on if I should split a msg into multiple parts.
7113 * This is only asked of incomplete messages.
7117 * If we are doing EEOR we need to always send it if its the
7118 * entire thing, since it might be all the guy is putting in
7121 if (space_left >= length) {
7123 * If we have data outstanding,
7124 * we get another chance when the sack
7125 * arrives to transmit - wait for more data
7127 if (stcb->asoc.total_flight == 0) {
7129 * If nothing is in flight, we zero the
7137 /* You can fill the rest */
7138 return (space_left);
7142 * For those strange folk that make the send buffer
7143 * smaller than our fragmentation point, we can't
7144 * get a full msg in so we have to allow splitting.
7146 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7149 if ((length <= space_left) ||
7150 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7151 /* Sub-optimial residual don't split in non-eeor mode. */
7155 * If we reach here length is larger than the space_left. Do we wish
7156 * to split it for the sake of packet putting together?
7158 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7159 /* Its ok to split it */
7160 return (min(space_left, frag_point));
7162 /* Nope, can't split */
7167 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7168 struct sctp_stream_out *strq,
7169 uint32_t space_left,
7170 uint32_t frag_point,
7175 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7180 /* Move from the stream to the send_queue keeping track of the total */
7181 struct sctp_association *asoc;
7182 struct sctp_stream_queue_pending *sp;
7183 struct sctp_tmit_chunk *chk;
7184 struct sctp_data_chunk *dchkh = NULL;
7185 struct sctp_idata_chunk *ndchkh = NULL;
7186 uint32_t to_move, length;
7188 uint8_t rcv_flags = 0;
7190 uint8_t send_lock_up = 0;
7192 SCTP_TCB_LOCK_ASSERT(stcb);
7195 /* sa_ignore FREED_MEMORY */
7196 sp = TAILQ_FIRST(&strq->outqueue);
7198 if (send_lock_up == 0) {
7199 SCTP_TCB_SEND_LOCK(stcb);
7202 sp = TAILQ_FIRST(&strq->outqueue);
7206 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7207 (stcb->asoc.idata_supported == 0) &&
7208 (strq->last_msg_incomplete)) {
7209 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7211 strq->last_msg_incomplete);
7212 strq->last_msg_incomplete = 0;
7216 SCTP_TCB_SEND_UNLOCK(stcb);
7221 if ((sp->msg_is_complete) && (sp->length == 0)) {
7222 if (sp->sender_all_done) {
7224 * We are doing deferred cleanup. Last time through
7225 * when we took all the data the sender_all_done was
7228 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7229 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7230 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7231 sp->sender_all_done,
7233 sp->msg_is_complete,
7237 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7238 SCTP_TCB_SEND_LOCK(stcb);
7241 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7242 TAILQ_REMOVE(&strq->outqueue, sp, next);
7243 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7244 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7245 (strq->chunks_on_queues == 0) &&
7246 TAILQ_EMPTY(&strq->outqueue)) {
7247 stcb->asoc.trigger_reset = 1;
7250 sctp_free_remote_addr(sp->net);
7254 sctp_m_freem(sp->data);
7257 sctp_free_a_strmoq(stcb, sp, so_locked);
7258 /* we can't be locked to it */
7260 SCTP_TCB_SEND_UNLOCK(stcb);
7263 /* back to get the next msg */
7267 * sender just finished this but still holds a
7275 /* is there some to get */
7276 if (sp->length == 0) {
7281 } else if (sp->discard_rest) {
7282 if (send_lock_up == 0) {
7283 SCTP_TCB_SEND_LOCK(stcb);
7286 /* Whack down the size */
7287 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7288 if ((stcb->sctp_socket != NULL) &&
7289 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7290 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7291 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7294 sctp_m_freem(sp->data);
7296 sp->tail_mbuf = NULL;
7305 some_taken = sp->some_taken;
7307 length = sp->length;
7308 if (sp->msg_is_complete) {
7309 /* The message is complete */
7310 to_move = min(length, frag_point);
7311 if (to_move == length) {
7312 /* All of it fits in the MTU */
7313 if (sp->some_taken) {
7314 rcv_flags |= SCTP_DATA_LAST_FRAG;
7316 rcv_flags |= SCTP_DATA_NOT_FRAG;
7318 sp->put_last_out = 1;
7319 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7320 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7323 /* Not all of it fits, we fragment */
7324 if (sp->some_taken == 0) {
7325 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7330 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7333 * We use a snapshot of length in case it
7334 * is expanding during the compare.
7339 if (to_move >= llen) {
7341 if (send_lock_up == 0) {
7343 * We are taking all of an incomplete msg
7344 * thus we need a send lock.
7346 SCTP_TCB_SEND_LOCK(stcb);
7348 if (sp->msg_is_complete) {
7350 * the sender finished the
7357 if (sp->some_taken == 0) {
7358 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7362 /* Nothing to take. */
7369 /* If we reach here, we can copy out a chunk */
7370 sctp_alloc_a_chunk(stcb, chk);
7372 /* No chunk memory */
7378 * Setup for unordered if needed by looking at the user sent info
7381 if (sp->sinfo_flags & SCTP_UNORDERED) {
7382 rcv_flags |= SCTP_DATA_UNORDERED;
7384 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7385 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7386 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7388 /* clear out the chunk before setting up */
7389 memset(chk, 0, sizeof(*chk));
7390 chk->rec.data.rcv_flags = rcv_flags;
7392 if (to_move >= length) {
7393 /* we think we can steal the whole thing */
7394 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7395 SCTP_TCB_SEND_LOCK(stcb);
7398 if (to_move < sp->length) {
7399 /* bail, it changed */
7402 chk->data = sp->data;
7403 chk->last_mbuf = sp->tail_mbuf;
7404 /* register the stealing */
7405 sp->data = sp->tail_mbuf = NULL;
7410 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7411 chk->last_mbuf = NULL;
7412 if (chk->data == NULL) {
7413 sp->some_taken = some_taken;
7414 sctp_free_a_chunk(stcb, chk, so_locked);
7419 #ifdef SCTP_MBUF_LOGGING
7420 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7421 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7424 /* Pull off the data */
7425 m_adj(sp->data, to_move);
7426 /* Now lets work our way down and compact it */
7428 while (m && (SCTP_BUF_LEN(m) == 0)) {
7429 sp->data = SCTP_BUF_NEXT(m);
7430 SCTP_BUF_NEXT(m) = NULL;
7431 if (sp->tail_mbuf == m) {
7433 * Freeing tail? TSNH since
7434 * we supposedly were taking less
7435 * than the sp->length.
7438 panic("Huh, freing tail? - TSNH");
7440 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7441 sp->tail_mbuf = sp->data = NULL;
7450 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7451 chk->copy_by_ref = 1;
7453 chk->copy_by_ref = 0;
7456 * get last_mbuf and counts of mb usage This is ugly but hopefully
7457 * its only one mbuf.
7459 if (chk->last_mbuf == NULL) {
7460 chk->last_mbuf = chk->data;
7461 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7462 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7466 if (to_move > length) {
7467 /*- This should not happen either
7468 * since we always lower to_move to the size
7469 * of sp->length if its larger.
7472 panic("Huh, how can to_move be larger?");
7474 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7478 atomic_subtract_int(&sp->length, to_move);
7480 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7481 if (M_LEADINGSPACE(chk->data) < leading) {
7482 /* Not enough room for a chunk header, get some */
7485 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7488 * we're in trouble here. _PREPEND below will free
7489 * all the data if there is no leading space, so we
7490 * must put the data back and restore.
7492 if (send_lock_up == 0) {
7493 SCTP_TCB_SEND_LOCK(stcb);
7496 if (sp->data == NULL) {
7497 /* unsteal the data */
7498 sp->data = chk->data;
7499 sp->tail_mbuf = chk->last_mbuf;
7503 /* reassemble the data */
7505 sp->data = chk->data;
7506 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7508 sp->some_taken = some_taken;
7509 atomic_add_int(&sp->length, to_move);
7512 sctp_free_a_chunk(stcb, chk, so_locked);
7516 SCTP_BUF_LEN(m) = 0;
7517 SCTP_BUF_NEXT(m) = chk->data;
7519 M_ALIGN(chk->data, 4);
7522 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7523 if (chk->data == NULL) {
7524 /* HELP, TSNH since we assured it would not above? */
7526 panic("prepend failes HELP?");
7528 SCTP_PRINTF("prepend fails HELP?\n");
7529 sctp_free_a_chunk(stcb, chk, so_locked);
7535 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7536 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7537 chk->book_size_scale = 0;
7538 chk->sent = SCTP_DATAGRAM_UNSENT;
7541 chk->asoc = &stcb->asoc;
7542 chk->pad_inplace = 0;
7543 chk->no_fr_allowed = 0;
7544 if (stcb->asoc.idata_supported == 0) {
7545 if (rcv_flags & SCTP_DATA_UNORDERED) {
7546 /* Just use 0. The receiver ignores the values. */
7547 chk->rec.data.mid = 0;
7549 chk->rec.data.mid = strq->next_mid_ordered;
7550 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7551 strq->next_mid_ordered++;
7555 if (rcv_flags & SCTP_DATA_UNORDERED) {
7556 chk->rec.data.mid = strq->next_mid_unordered;
7557 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7558 strq->next_mid_unordered++;
7561 chk->rec.data.mid = strq->next_mid_ordered;
7562 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7563 strq->next_mid_ordered++;
7567 chk->rec.data.sid = sp->sid;
7568 chk->rec.data.ppid = sp->ppid;
7569 chk->rec.data.context = sp->context;
7570 chk->rec.data.doing_fast_retransmit = 0;
7572 chk->rec.data.timetodrop = sp->ts;
7573 chk->flags = sp->act_flags;
7576 chk->whoTo = sp->net;
7577 atomic_add_int(&chk->whoTo->ref_count, 1);
7581 if (sp->holds_key_ref) {
7582 chk->auth_keyid = sp->auth_keyid;
7583 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7584 chk->holds_key_ref = 1;
7586 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7587 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7588 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7589 (uint32_t)(uintptr_t)stcb, sp->length,
7590 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7593 if (stcb->asoc.idata_supported == 0) {
7594 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7596 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7599 * Put the rest of the things in place now. Size was done earlier in
7600 * previous loop prior to padding.
7603 #ifdef SCTP_ASOCLOG_OF_TSNS
7604 SCTP_TCB_LOCK_ASSERT(stcb);
7605 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7606 asoc->tsn_out_at = 0;
7607 asoc->tsn_out_wrapped = 1;
7609 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7610 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7611 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7612 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7613 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7614 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7615 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7616 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7619 if (stcb->asoc.idata_supported == 0) {
7620 dchkh->ch.chunk_type = SCTP_DATA;
7621 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7622 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7623 dchkh->dp.sid = htons(strq->sid);
7624 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7625 dchkh->dp.ppid = chk->rec.data.ppid;
7626 dchkh->ch.chunk_length = htons(chk->send_size);
7628 ndchkh->ch.chunk_type = SCTP_IDATA;
7629 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7630 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7631 ndchkh->dp.sid = htons(strq->sid);
7632 ndchkh->dp.reserved = htons(0);
7633 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7635 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7637 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7639 ndchkh->ch.chunk_length = htons(chk->send_size);
7641 /* Now advance the chk->send_size by the actual pad needed. */
7642 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7647 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7648 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7650 chk->last_mbuf = lm;
7651 chk->pad_inplace = 1;
7653 chk->send_size += pads;
7655 if (PR_SCTP_ENABLED(chk->flags)) {
7656 asoc->pr_sctp_cnt++;
7658 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7659 /* All done pull and kill the message */
7660 if (sp->put_last_out == 0) {
7661 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7662 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7663 sp->sender_all_done,
7665 sp->msg_is_complete,
7669 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7670 SCTP_TCB_SEND_LOCK(stcb);
7673 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7674 TAILQ_REMOVE(&strq->outqueue, sp, next);
7675 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7676 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7677 (strq->chunks_on_queues == 0) &&
7678 TAILQ_EMPTY(&strq->outqueue)) {
7679 stcb->asoc.trigger_reset = 1;
7682 sctp_free_remote_addr(sp->net);
7686 sctp_m_freem(sp->data);
7689 sctp_free_a_strmoq(stcb, sp, so_locked);
7691 asoc->chunks_on_out_queue++;
7692 strq->chunks_on_queues++;
7693 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7694 asoc->send_queue_cnt++;
7697 SCTP_TCB_SEND_UNLOCK(stcb);
7704 sctp_fill_outqueue(struct sctp_tcb *stcb,
7705 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7706 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7711 struct sctp_association *asoc;
7712 struct sctp_stream_out *strq;
7713 uint32_t space_left, moved, total_moved;
7716 SCTP_TCB_LOCK_ASSERT(stcb);
7719 switch (net->ro._l_addr.sa.sa_family) {
7722 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7727 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7732 space_left = net->mtu;
7735 /* Need an allowance for the data chunk header too */
7736 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7738 /* must make even word boundary */
7739 space_left &= 0xfffffffc;
7740 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7743 while ((space_left > 0) && (strq != NULL)) {
7744 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7745 &giveup, eeor_mode, &bail, so_locked);
7746 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7747 if ((giveup != 0) || (bail != 0)) {
7750 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7751 total_moved += moved;
7752 space_left -= moved;
7753 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7754 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7758 space_left &= 0xfffffffc;
7763 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7765 if (total_moved == 0) {
7766 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7767 (net == stcb->asoc.primary_destination)) {
7768 /* ran dry for primary network net */
7769 SCTP_STAT_INCR(sctps_primary_randry);
7770 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7771 /* ran dry with CMT on */
7772 SCTP_STAT_INCR(sctps_cmt_randry);
7778 sctp_fix_ecn_echo(struct sctp_association *asoc)
7780 struct sctp_tmit_chunk *chk;
7782 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7783 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7784 chk->sent = SCTP_DATAGRAM_UNSENT;
7790 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7792 struct sctp_association *asoc;
7793 struct sctp_tmit_chunk *chk;
7794 struct sctp_stream_queue_pending *sp;
7801 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7802 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7803 if (sp->net == net) {
7804 sctp_free_remote_addr(sp->net);
7809 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7810 if (chk->whoTo == net) {
7811 sctp_free_remote_addr(chk->whoTo);
7818 sctp_med_chunk_output(struct sctp_inpcb *inp,
7819 struct sctp_tcb *stcb,
7820 struct sctp_association *asoc,
7823 int control_only, int from_where,
7824 struct timeval *now, int *now_filled, int frag_point, int so_locked
7825 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7831 * Ok this is the generic chunk service queue. we must do the
7833 * - Service the stream queue that is next, moving any
7834 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7835 * LAST to the out queue in one pass) and assigning TSN's. This
7836 * only applys though if the peer does not support NDATA. For NDATA
7837 * chunks its ok to not send the entire message ;-)
7838 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7839 * fomulate and send the low level chunks. Making sure to combine
7840 * any control in the control chunk queue also.
7842 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7843 struct mbuf *outchain, *endoutchain;
7844 struct sctp_tmit_chunk *chk, *nchk;
7846 /* temp arrays for unlinking */
7847 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7848 int no_fragmentflg, error;
7849 unsigned int max_rwnd_per_dest, max_send_per_dest;
7850 int one_chunk, hbflag, skip_data_for_this_net;
7851 int asconf, cookie, no_out_cnt;
7852 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7853 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7855 uint32_t auth_offset = 0;
7856 struct sctp_auth_chunk *auth = NULL;
7857 uint16_t auth_keyid;
7858 int override_ok = 1;
7859 int skip_fill_up = 0;
7860 int data_auth_reqd = 0;
7863 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7870 auth_keyid = stcb->asoc.authinfo.active_keyid;
7871 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7872 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7873 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7878 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7880 * First lets prime the pump. For each destination, if there is room
7881 * in the flight size, attempt to pull an MTU's worth out of the
7882 * stream queues into the general send_queue
7884 #ifdef SCTP_AUDITING_ENABLED
7885 sctp_audit_log(0xC2, 2);
7887 SCTP_TCB_LOCK_ASSERT(stcb);
7894 /* Nothing to possible to send? */
7895 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7896 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7897 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7898 TAILQ_EMPTY(&asoc->send_queue) &&
7899 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7904 if (asoc->peers_rwnd == 0) {
7905 /* No room in peers rwnd */
7907 if (asoc->total_flight > 0) {
7908 /* we are allowed one chunk in flight */
7912 if (stcb->asoc.ecn_echo_cnt_onq) {
7913 /* Record where a sack goes, if any */
7914 if (no_data_chunks &&
7915 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7916 /* Nothing but ECNe to send - we don't do that */
7917 goto nothing_to_send;
7919 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7920 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7921 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7922 sack_goes_to = chk->whoTo;
7927 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7928 if (stcb->sctp_socket)
7929 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7931 max_send_per_dest = 0;
7932 if (no_data_chunks == 0) {
7933 /* How many non-directed chunks are there? */
7934 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7935 if (chk->whoTo == NULL) {
7937 * We already have non-directed chunks on
7938 * the queue, no need to do a fill-up.
7946 if ((no_data_chunks == 0) &&
7947 (skip_fill_up == 0) &&
7948 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7949 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7951 * This for loop we are in takes in each net, if
7952 * its's got space in cwnd and has data sent to it
7953 * (when CMT is off) then it calls
7954 * sctp_fill_outqueue for the net. This gets data on
7955 * the send queue for that network.
7957 * In sctp_fill_outqueue TSN's are assigned and data
7958 * is copied out of the stream buffers. Note mostly
7959 * copy by reference (we hope).
7961 net->window_probe = 0;
7962 if ((net != stcb->asoc.alternate) &&
7963 ((net->dest_state & SCTP_ADDR_PF) ||
7964 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7965 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7967 sctp_log_cwnd(stcb, net, 1,
7968 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7972 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7973 (net->flight_size == 0)) {
7974 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7976 if (net->flight_size >= net->cwnd) {
7977 /* skip this network, no room - can't fill */
7978 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7979 sctp_log_cwnd(stcb, net, 3,
7980 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7984 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7985 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7987 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7989 /* memory alloc failure */
7995 /* now service each destination and send out what we can for it */
7996 /* Nothing to send? */
7997 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7998 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7999 TAILQ_EMPTY(&asoc->send_queue)) {
8004 if (asoc->sctp_cmt_on_off > 0) {
8005 /* get the last start point */
8006 start_at = asoc->last_net_cmt_send_started;
8007 if (start_at == NULL) {
8008 /* null so to beginning */
8009 start_at = TAILQ_FIRST(&asoc->nets);
8011 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8012 if (start_at == NULL) {
8013 start_at = TAILQ_FIRST(&asoc->nets);
8016 asoc->last_net_cmt_send_started = start_at;
8018 start_at = TAILQ_FIRST(&asoc->nets);
8020 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8021 if (chk->whoTo == NULL) {
8022 if (asoc->alternate) {
8023 chk->whoTo = asoc->alternate;
8025 chk->whoTo = asoc->primary_destination;
8027 atomic_add_int(&chk->whoTo->ref_count, 1);
8030 old_start_at = NULL;
8031 again_one_more_time:
8032 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8033 /* how much can we send? */
8034 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8035 if (old_start_at && (old_start_at == net)) {
8036 /* through list ocmpletely. */
8040 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8041 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8042 (net->flight_size >= net->cwnd)) {
8044 * Nothing on control or asconf and flight is full,
8045 * we can skip even in the CMT case.
8050 endoutchain = outchain = NULL;
8053 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8054 skip_data_for_this_net = 1;
8056 skip_data_for_this_net = 0;
8058 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8061 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8066 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8076 if (mtu > asoc->peers_rwnd) {
8077 if (asoc->total_flight > 0) {
8078 /* We have a packet in flight somewhere */
8079 r_mtu = asoc->peers_rwnd;
8081 /* We are always allowed to send one MTU out */
8089 /************************/
8090 /* ASCONF transmission */
8091 /************************/
8092 /* Now first lets go through the asconf queue */
8093 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8094 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8097 if (chk->whoTo == NULL) {
8098 if (asoc->alternate == NULL) {
8099 if (asoc->primary_destination != net) {
8103 if (asoc->alternate != net) {
8108 if (chk->whoTo != net) {
8112 if (chk->data == NULL) {
8115 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8116 chk->sent != SCTP_DATAGRAM_RESEND) {
8120 * if no AUTH is yet included and this chunk
8121 * requires it, make sure to account for it. We
8122 * don't apply the size until the AUTH chunk is
8123 * actually added below in case there is no room for
8124 * this chunk. NOTE: we overload the use of "omtu"
8127 if ((auth == NULL) &&
8128 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8129 stcb->asoc.peer_auth_chunks)) {
8130 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8133 /* Here we do NOT factor the r_mtu */
8134 if ((chk->send_size < (int)(mtu - omtu)) ||
8135 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8137 * We probably should glom the mbuf chain
8138 * from the chk->data for control but the
8139 * problem is it becomes yet one more level
8140 * of tracking to do if for some reason
8141 * output fails. Then I have got to
8142 * reconstruct the merged control chain.. el
8143 * yucko.. for now we take the easy way and
8147 * Add an AUTH chunk, if chunk requires it
8148 * save the offset into the chain for AUTH
8150 if ((auth == NULL) &&
8151 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8152 stcb->asoc.peer_auth_chunks))) {
8153 outchain = sctp_add_auth_chunk(outchain,
8158 chk->rec.chunk_id.id);
8159 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8161 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8162 (int)chk->rec.chunk_id.can_take_data,
8163 chk->send_size, chk->copy_by_ref);
8164 if (outchain == NULL) {
8166 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8169 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8170 /* update our MTU size */
8171 if (mtu > (chk->send_size + omtu))
8172 mtu -= (chk->send_size + omtu);
8175 to_out += (chk->send_size + omtu);
8176 /* Do clear IP_DF ? */
8177 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8180 if (chk->rec.chunk_id.can_take_data)
8183 * set hb flag since we can use these for
8189 * should sysctl this: don't bundle data
8190 * with ASCONF since it requires AUTH
8193 chk->sent = SCTP_DATAGRAM_SENT;
8194 if (chk->whoTo == NULL) {
8196 atomic_add_int(&net->ref_count, 1);
8201 * Ok we are out of room but we can
8202 * output without effecting the
8203 * flight size since this little guy
8204 * is a control only packet.
8206 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8208 * do NOT clear the asconf flag as
8209 * it is used to do appropriate
8210 * source address selection.
8212 if (*now_filled == 0) {
8213 (void)SCTP_GETTIME_TIMEVAL(now);
8216 net->last_sent_time = *now;
8218 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8219 (struct sockaddr *)&net->ro._l_addr,
8220 outchain, auth_offset, auth,
8221 stcb->asoc.authinfo.active_keyid,
8222 no_fragmentflg, 0, asconf,
8223 inp->sctp_lport, stcb->rport,
8224 htonl(stcb->asoc.peer_vtag),
8229 * error, we could not
8232 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8233 if (from_where == 0) {
8234 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8236 if (error == ENOBUFS) {
8237 asoc->ifp_had_enobuf = 1;
8238 SCTP_STAT_INCR(sctps_lowlevelerr);
8240 /* error, could not output */
8241 if (error == EHOSTUNREACH) {
8247 sctp_move_chunks_from_net(stcb, net);
8252 asoc->ifp_had_enobuf = 0;
8255 * increase the number we sent, if a
8256 * cookie is sent we don't tell them
8259 outchain = endoutchain = NULL;
8263 *num_out += ctl_cnt;
8264 /* recalc a clean slate and setup */
8265 switch (net->ro._l_addr.sa.sa_family) {
8268 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8273 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8290 /************************/
8291 /* Control transmission */
8292 /************************/
8293 /* Now first lets go through the control queue */
8294 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8295 if ((sack_goes_to) &&
8296 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8297 (chk->whoTo != sack_goes_to)) {
8299 * if we have a sack in queue, and we are
8300 * looking at an ecn echo that is NOT queued
8301 * to where the sack is going..
8303 if (chk->whoTo == net) {
8305 * Don't transmit it to where its
8306 * going (current net)
8309 } else if (sack_goes_to == net) {
8311 * But do transmit it to this
8314 goto skip_net_check;
8317 if (chk->whoTo == NULL) {
8318 if (asoc->alternate == NULL) {
8319 if (asoc->primary_destination != net) {
8323 if (asoc->alternate != net) {
8328 if (chk->whoTo != net) {
8333 if (chk->data == NULL) {
8336 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8338 * It must be unsent. Cookies and ASCONF's
8339 * hang around but there timers will force
8340 * when marked for resend.
8345 * if no AUTH is yet included and this chunk
8346 * requires it, make sure to account for it. We
8347 * don't apply the size until the AUTH chunk is
8348 * actually added below in case there is no room for
8349 * this chunk. NOTE: we overload the use of "omtu"
8352 if ((auth == NULL) &&
8353 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8354 stcb->asoc.peer_auth_chunks)) {
8355 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8358 /* Here we do NOT factor the r_mtu */
8359 if ((chk->send_size <= (int)(mtu - omtu)) ||
8360 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8362 * We probably should glom the mbuf chain
8363 * from the chk->data for control but the
8364 * problem is it becomes yet one more level
8365 * of tracking to do if for some reason
8366 * output fails. Then I have got to
8367 * reconstruct the merged control chain.. el
8368 * yucko.. for now we take the easy way and
8372 * Add an AUTH chunk, if chunk requires it
8373 * save the offset into the chain for AUTH
8375 if ((auth == NULL) &&
8376 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8377 stcb->asoc.peer_auth_chunks))) {
8378 outchain = sctp_add_auth_chunk(outchain,
8383 chk->rec.chunk_id.id);
8384 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8386 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8387 (int)chk->rec.chunk_id.can_take_data,
8388 chk->send_size, chk->copy_by_ref);
8389 if (outchain == NULL) {
8391 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8394 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8395 /* update our MTU size */
8396 if (mtu > (chk->send_size + omtu))
8397 mtu -= (chk->send_size + omtu);
8400 to_out += (chk->send_size + omtu);
8401 /* Do clear IP_DF ? */
8402 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8405 if (chk->rec.chunk_id.can_take_data)
8407 /* Mark things to be removed, if needed */
8408 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8409 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8410 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8411 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8412 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8413 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8414 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8415 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8416 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8417 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8418 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8419 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8422 /* remove these chunks at the end */
8423 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8424 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8425 /* turn off the timer */
8426 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8427 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8429 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8435 * Other chunks, since they have
8436 * timers running (i.e. COOKIE) we
8437 * just "trust" that it gets sent or
8441 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8444 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8446 * Increment ecne send count
8447 * here this means we may be
8448 * over-zealous in our
8449 * counting if the send
8450 * fails, but its the best
8451 * place to do it (we used
8452 * to do it in the queue of
8453 * the chunk, but that did
8454 * not tell how many times
8457 SCTP_STAT_INCR(sctps_sendecne);
8459 chk->sent = SCTP_DATAGRAM_SENT;
8460 if (chk->whoTo == NULL) {
8462 atomic_add_int(&net->ref_count, 1);
8468 * Ok we are out of room but we can
8469 * output without effecting the
8470 * flight size since this little guy
8471 * is a control only packet.
8474 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8476 * do NOT clear the asconf
8477 * flag as it is used to do
8478 * appropriate source
8479 * address selection.
8483 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8486 /* Only HB or ASCONF advances time */
8488 if (*now_filled == 0) {
8489 (void)SCTP_GETTIME_TIMEVAL(now);
8492 net->last_sent_time = *now;
8495 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8496 (struct sockaddr *)&net->ro._l_addr,
8499 stcb->asoc.authinfo.active_keyid,
8500 no_fragmentflg, 0, asconf,
8501 inp->sctp_lport, stcb->rport,
8502 htonl(stcb->asoc.peer_vtag),
8507 * error, we could not
8510 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8511 if (from_where == 0) {
8512 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8514 if (error == ENOBUFS) {
8515 asoc->ifp_had_enobuf = 1;
8516 SCTP_STAT_INCR(sctps_lowlevelerr);
8518 if (error == EHOSTUNREACH) {
8524 sctp_move_chunks_from_net(stcb, net);
8529 asoc->ifp_had_enobuf = 0;
8532 * increase the number we sent, if a
8533 * cookie is sent we don't tell them
8536 outchain = endoutchain = NULL;
8540 *num_out += ctl_cnt;
8541 /* recalc a clean slate and setup */
8542 switch (net->ro._l_addr.sa.sa_family) {
8545 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8550 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8567 /* JRI: if dest is in PF state, do not send data to it */
8568 if ((asoc->sctp_cmt_on_off > 0) &&
8569 (net != stcb->asoc.alternate) &&
8570 (net->dest_state & SCTP_ADDR_PF)) {
8573 if (net->flight_size >= net->cwnd) {
8576 if ((asoc->sctp_cmt_on_off > 0) &&
8577 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8578 (net->flight_size > max_rwnd_per_dest)) {
8582 * We need a specific accounting for the usage of the send
8583 * buffer. We also need to check the number of messages per
8584 * net. For now, this is better than nothing and it disabled
8587 if ((asoc->sctp_cmt_on_off > 0) &&
8588 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8589 (max_send_per_dest > 0) &&
8590 (net->flight_size > max_send_per_dest)) {
8593 /*********************/
8594 /* Data transmission */
8595 /*********************/
8597 * if AUTH for DATA is required and no AUTH has been added
8598 * yet, account for this in the mtu now... if no data can be
8599 * bundled, this adjustment won't matter anyways since the
8600 * packet will be going out...
8602 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8603 stcb->asoc.peer_auth_chunks);
8604 if (data_auth_reqd && (auth == NULL)) {
8605 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8607 /* now lets add any data within the MTU constraints */
8608 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8611 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8612 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8619 if (net->mtu > SCTP_MIN_OVERHEAD)
8620 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8630 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8631 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8632 (skip_data_for_this_net == 0)) ||
8634 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8635 if (no_data_chunks) {
8636 /* let only control go out */
8640 if (net->flight_size >= net->cwnd) {
8641 /* skip this net, no room for data */
8645 if ((chk->whoTo != NULL) &&
8646 (chk->whoTo != net)) {
8647 /* Don't send the chunk on this net */
8651 if (asoc->sctp_cmt_on_off == 0) {
8652 if ((asoc->alternate) &&
8653 (asoc->alternate != net) &&
8654 (chk->whoTo == NULL)) {
8656 } else if ((net != asoc->primary_destination) &&
8657 (asoc->alternate == NULL) &&
8658 (chk->whoTo == NULL)) {
8662 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8664 * strange, we have a chunk that is
8665 * to big for its destination and
8666 * yet no fragment ok flag.
8667 * Something went wrong when the
8668 * PMTU changed...we did not mark
8669 * this chunk for some reason?? I
8670 * will fix it here by letting IP
8671 * fragment it for now and printing
8672 * a warning. This really should not
8675 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8676 chk->send_size, mtu);
8677 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8679 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8680 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8681 struct sctp_data_chunk *dchkh;
8683 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8684 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8686 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8687 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8688 /* ok we will add this one */
8691 * Add an AUTH chunk, if chunk
8692 * requires it, save the offset into
8693 * the chain for AUTH
8695 if (data_auth_reqd) {
8697 outchain = sctp_add_auth_chunk(outchain,
8703 auth_keyid = chk->auth_keyid;
8705 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8706 } else if (override_ok) {
8711 auth_keyid = chk->auth_keyid;
8713 } else if (auth_keyid != chk->auth_keyid) {
8721 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8722 chk->send_size, chk->copy_by_ref);
8723 if (outchain == NULL) {
8724 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8725 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8726 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8729 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8732 /* upate our MTU size */
8733 /* Do clear IP_DF ? */
8734 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8737 /* unsigned subtraction of mtu */
8738 if (mtu > chk->send_size)
8739 mtu -= chk->send_size;
8742 /* unsigned subtraction of r_mtu */
8743 if (r_mtu > chk->send_size)
8744 r_mtu -= chk->send_size;
8748 to_out += chk->send_size;
8749 if ((to_out > mx_mtu) && no_fragmentflg) {
8751 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8753 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8757 chk->window_probe = 0;
8758 data_list[bundle_at++] = chk;
8759 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8762 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8763 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8764 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8766 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8768 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8769 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8779 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8781 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8782 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8783 data_list[0]->window_probe = 1;
8784 net->window_probe = 1;
8790 * Must be sent in order of the
8791 * TSN's (on a network)
8795 } /* for (chunk gather loop for this net) */
8796 } /* if asoc.state OPEN */
8798 /* Is there something to send for this destination? */
8800 /* We may need to start a control timer or two */
8802 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8805 * do NOT clear the asconf flag as it is
8806 * used to do appropriate source address
8811 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8814 /* must start a send timer if data is being sent */
8815 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8817 * no timer running on this destination
8820 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8822 if (bundle_at || hbflag) {
8823 /* For data/asconf and hb set time */
8824 if (*now_filled == 0) {
8825 (void)SCTP_GETTIME_TIMEVAL(now);
8828 net->last_sent_time = *now;
8830 /* Now send it, if there is anything to send :> */
8831 if ((error = sctp_lowlevel_chunk_output(inp,
8834 (struct sockaddr *)&net->ro._l_addr,
8842 inp->sctp_lport, stcb->rport,
8843 htonl(stcb->asoc.peer_vtag),
8847 /* error, we could not output */
8848 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8849 if (from_where == 0) {
8850 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8852 if (error == ENOBUFS) {
8853 asoc->ifp_had_enobuf = 1;
8854 SCTP_STAT_INCR(sctps_lowlevelerr);
8856 if (error == EHOSTUNREACH) {
8858 * Destination went unreachable
8861 sctp_move_chunks_from_net(stcb, net);
8865 * I add this line to be paranoid. As far as
8866 * I can tell the continue, takes us back to
8867 * the top of the for, but just to make sure
8868 * I will reset these again here.
8870 ctl_cnt = bundle_at = 0;
8871 continue; /* This takes us back to the
8872 * for() for the nets. */
8874 asoc->ifp_had_enobuf = 0;
8880 *num_out += (ctl_cnt + bundle_at);
8883 /* setup for a RTO measurement */
8884 tsns_sent = data_list[0]->rec.data.tsn;
8885 /* fill time if not already filled */
8886 if (*now_filled == 0) {
8887 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8889 *now = asoc->time_last_sent;
8891 asoc->time_last_sent = *now;
8893 if (net->rto_needed) {
8894 data_list[0]->do_rtt = 1;
8895 net->rto_needed = 0;
8897 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8898 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8904 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8905 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8908 if (old_start_at == NULL) {
8909 old_start_at = start_at;
8910 start_at = TAILQ_FIRST(&asoc->nets);
8912 goto again_one_more_time;
8916 * At the end there should be no NON timed chunks hanging on this
8919 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8920 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8922 if ((*num_out == 0) && (*reason_code == 0)) {
8927 sctp_clean_up_ctl(stcb, asoc, so_locked);
8932 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8935 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8936 * the control chunk queue.
8938 struct sctp_chunkhdr *hdr;
8939 struct sctp_tmit_chunk *chk;
8940 struct mbuf *mat, *last_mbuf;
8941 uint32_t chunk_length;
8942 uint16_t padding_length;
8944 SCTP_TCB_LOCK_ASSERT(stcb);
8945 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8946 if (op_err == NULL) {
8951 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8952 chunk_length += SCTP_BUF_LEN(mat);
8953 if (SCTP_BUF_NEXT(mat) == NULL) {
8957 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8958 sctp_m_freem(op_err);
8961 padding_length = chunk_length % 4;
8962 if (padding_length != 0) {
8963 padding_length = 4 - padding_length;
8965 if (padding_length != 0) {
8966 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8967 sctp_m_freem(op_err);
8971 sctp_alloc_a_chunk(stcb, chk);
8974 sctp_m_freem(op_err);
8977 chk->copy_by_ref = 0;
8978 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8979 chk->rec.chunk_id.can_take_data = 0;
8981 chk->send_size = (uint16_t)chunk_length;
8982 chk->sent = SCTP_DATAGRAM_UNSENT;
8984 chk->asoc = &stcb->asoc;
8987 hdr = mtod(op_err, struct sctp_chunkhdr *);
8988 hdr->chunk_type = SCTP_OPERATION_ERROR;
8989 hdr->chunk_flags = 0;
8990 hdr->chunk_length = htons(chk->send_size);
8991 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8992 chk->asoc->ctrl_queue_cnt++;
8996 sctp_send_cookie_echo(struct mbuf *m,
8998 struct sctp_tcb *stcb,
8999 struct sctp_nets *net)
9002 * pull out the cookie and put it at the front of the control chunk
9006 struct mbuf *cookie;
9007 struct sctp_paramhdr param, *phdr;
9008 struct sctp_chunkhdr *hdr;
9009 struct sctp_tmit_chunk *chk;
9010 uint16_t ptype, plen;
9012 SCTP_TCB_LOCK_ASSERT(stcb);
9013 /* First find the cookie in the param area */
9015 at = offset + sizeof(struct sctp_init_chunk);
9017 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
9021 ptype = ntohs(phdr->param_type);
9022 plen = ntohs(phdr->param_length);
9023 if (ptype == SCTP_STATE_COOKIE) {
9026 /* found the cookie */
9027 if ((pad = (plen % 4))) {
9030 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9031 if (cookie == NULL) {
9035 #ifdef SCTP_MBUF_LOGGING
9036 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9037 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9042 at += SCTP_SIZE32(plen);
9044 /* ok, we got the cookie lets change it into a cookie echo chunk */
9045 /* first the change from param to cookie */
9046 hdr = mtod(cookie, struct sctp_chunkhdr *);
9047 hdr->chunk_type = SCTP_COOKIE_ECHO;
9048 hdr->chunk_flags = 0;
9049 /* get the chunk stuff now and place it in the FRONT of the queue */
9050 sctp_alloc_a_chunk(stcb, chk);
9053 sctp_m_freem(cookie);
9056 chk->copy_by_ref = 0;
9057 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9058 chk->rec.chunk_id.can_take_data = 0;
9059 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9060 chk->send_size = plen;
9061 chk->sent = SCTP_DATAGRAM_UNSENT;
9063 chk->asoc = &stcb->asoc;
9066 atomic_add_int(&chk->whoTo->ref_count, 1);
9067 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9068 chk->asoc->ctrl_queue_cnt++;
9073 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9077 struct sctp_nets *net)
9080 * take a HB request and make it into a HB ack and send it.
9082 struct mbuf *outchain;
9083 struct sctp_chunkhdr *chdr;
9084 struct sctp_tmit_chunk *chk;
9088 /* must have a net pointer */
9091 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9092 if (outchain == NULL) {
9093 /* gak out of memory */
9096 #ifdef SCTP_MBUF_LOGGING
9097 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9098 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9101 chdr = mtod(outchain, struct sctp_chunkhdr *);
9102 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9103 chdr->chunk_flags = 0;
9104 if (chk_length % 4) {
9106 uint32_t cpthis = 0;
9109 padlen = 4 - (chk_length % 4);
9110 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9112 sctp_alloc_a_chunk(stcb, chk);
9115 sctp_m_freem(outchain);
9118 chk->copy_by_ref = 0;
9119 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9120 chk->rec.chunk_id.can_take_data = 1;
9122 chk->send_size = chk_length;
9123 chk->sent = SCTP_DATAGRAM_UNSENT;
9125 chk->asoc = &stcb->asoc;
9126 chk->data = outchain;
9128 atomic_add_int(&chk->whoTo->ref_count, 1);
9129 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9130 chk->asoc->ctrl_queue_cnt++;
9134 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9136 /* formulate and queue a cookie-ack back to sender */
9137 struct mbuf *cookie_ack;
9138 struct sctp_chunkhdr *hdr;
9139 struct sctp_tmit_chunk *chk;
9141 SCTP_TCB_LOCK_ASSERT(stcb);
9143 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9144 if (cookie_ack == NULL) {
9148 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9149 sctp_alloc_a_chunk(stcb, chk);
9152 sctp_m_freem(cookie_ack);
9155 chk->copy_by_ref = 0;
9156 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9157 chk->rec.chunk_id.can_take_data = 1;
9159 chk->send_size = sizeof(struct sctp_chunkhdr);
9160 chk->sent = SCTP_DATAGRAM_UNSENT;
9162 chk->asoc = &stcb->asoc;
9163 chk->data = cookie_ack;
9164 if (chk->asoc->last_control_chunk_from != NULL) {
9165 chk->whoTo = chk->asoc->last_control_chunk_from;
9166 atomic_add_int(&chk->whoTo->ref_count, 1);
9170 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9171 hdr->chunk_type = SCTP_COOKIE_ACK;
9172 hdr->chunk_flags = 0;
9173 hdr->chunk_length = htons(chk->send_size);
9174 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9175 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9176 chk->asoc->ctrl_queue_cnt++;
9182 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9184 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9185 struct mbuf *m_shutdown_ack;
9186 struct sctp_shutdown_ack_chunk *ack_cp;
9187 struct sctp_tmit_chunk *chk;
9189 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9190 if (m_shutdown_ack == NULL) {
9194 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9195 sctp_alloc_a_chunk(stcb, chk);
9198 sctp_m_freem(m_shutdown_ack);
9201 chk->copy_by_ref = 0;
9202 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9203 chk->rec.chunk_id.can_take_data = 1;
9205 chk->send_size = sizeof(struct sctp_chunkhdr);
9206 chk->sent = SCTP_DATAGRAM_UNSENT;
9208 chk->asoc = &stcb->asoc;
9209 chk->data = m_shutdown_ack;
9212 atomic_add_int(&chk->whoTo->ref_count, 1);
9214 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9215 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9216 ack_cp->ch.chunk_flags = 0;
9217 ack_cp->ch.chunk_length = htons(chk->send_size);
9218 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9219 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9220 chk->asoc->ctrl_queue_cnt++;
9225 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9227 /* formulate and queue a SHUTDOWN to the sender */
9228 struct mbuf *m_shutdown;
9229 struct sctp_shutdown_chunk *shutdown_cp;
9230 struct sctp_tmit_chunk *chk;
9232 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9233 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9234 /* We already have a SHUTDOWN queued. Reuse it. */
9236 sctp_free_remote_addr(chk->whoTo);
9243 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9244 if (m_shutdown == NULL) {
9248 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9249 sctp_alloc_a_chunk(stcb, chk);
9252 sctp_m_freem(m_shutdown);
9255 chk->copy_by_ref = 0;
9256 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9257 chk->rec.chunk_id.can_take_data = 1;
9259 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9260 chk->sent = SCTP_DATAGRAM_UNSENT;
9262 chk->asoc = &stcb->asoc;
9263 chk->data = m_shutdown;
9266 atomic_add_int(&chk->whoTo->ref_count, 1);
9268 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9269 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9270 shutdown_cp->ch.chunk_flags = 0;
9271 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9272 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9273 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9274 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9275 chk->asoc->ctrl_queue_cnt++;
9277 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9280 atomic_add_int(&chk->whoTo->ref_count, 1);
9282 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9283 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9284 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9290 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9293 * formulate and queue an ASCONF to the peer. ASCONF parameters
9294 * should be queued on the assoc queue.
9296 struct sctp_tmit_chunk *chk;
9297 struct mbuf *m_asconf;
9300 SCTP_TCB_LOCK_ASSERT(stcb);
9302 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9303 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9304 /* can't send a new one if there is one in flight already */
9308 /* compose an ASCONF chunk, maximum length is PMTU */
9309 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9310 if (m_asconf == NULL) {
9314 sctp_alloc_a_chunk(stcb, chk);
9317 sctp_m_freem(m_asconf);
9321 chk->copy_by_ref = 0;
9322 chk->rec.chunk_id.id = SCTP_ASCONF;
9323 chk->rec.chunk_id.can_take_data = 0;
9324 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9325 chk->data = m_asconf;
9326 chk->send_size = len;
9327 chk->sent = SCTP_DATAGRAM_UNSENT;
9329 chk->asoc = &stcb->asoc;
9332 atomic_add_int(&chk->whoTo->ref_count, 1);
9334 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9335 chk->asoc->ctrl_queue_cnt++;
9340 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9343 * formulate and queue a asconf-ack back to sender. the asconf-ack
9344 * must be stored in the tcb.
9346 struct sctp_tmit_chunk *chk;
9347 struct sctp_asconf_ack *ack, *latest_ack;
9349 struct sctp_nets *net = NULL;
9351 SCTP_TCB_LOCK_ASSERT(stcb);
9352 /* Get the latest ASCONF-ACK */
9353 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9354 if (latest_ack == NULL) {
9357 if (latest_ack->last_sent_to != NULL &&
9358 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9359 /* we're doing a retransmission */
9360 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9363 if (stcb->asoc.last_control_chunk_from == NULL) {
9364 if (stcb->asoc.alternate) {
9365 net = stcb->asoc.alternate;
9367 net = stcb->asoc.primary_destination;
9370 net = stcb->asoc.last_control_chunk_from;
9375 if (stcb->asoc.last_control_chunk_from == NULL) {
9376 if (stcb->asoc.alternate) {
9377 net = stcb->asoc.alternate;
9379 net = stcb->asoc.primary_destination;
9382 net = stcb->asoc.last_control_chunk_from;
9385 latest_ack->last_sent_to = net;
9387 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9388 if (ack->data == NULL) {
9392 /* copy the asconf_ack */
9393 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9394 if (m_ack == NULL) {
9395 /* couldn't copy it */
9398 #ifdef SCTP_MBUF_LOGGING
9399 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9400 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9404 sctp_alloc_a_chunk(stcb, chk);
9408 sctp_m_freem(m_ack);
9411 chk->copy_by_ref = 0;
9412 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9413 chk->rec.chunk_id.can_take_data = 1;
9414 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9417 atomic_add_int(&chk->whoTo->ref_count, 1);
9420 chk->send_size = ack->len;
9421 chk->sent = SCTP_DATAGRAM_UNSENT;
9423 chk->asoc = &stcb->asoc;
9425 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9426 chk->asoc->ctrl_queue_cnt++;
9433 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9434 struct sctp_tcb *stcb,
9435 struct sctp_association *asoc,
9436 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9437 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9443 * send out one MTU of retransmission. If fast_retransmit is
9444 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9445 * rwnd. For a Cookie or Asconf in the control chunk queue we
9446 * retransmit them by themselves.
9448 * For data chunks we will pick out the lowest TSN's in the sent_queue
9449 * marked for resend and bundle them all together (up to a MTU of
9450 * destination). The address to send to should have been
9451 * selected/changed where the retransmission was marked (i.e. in FR
9452 * or t3-timeout routines).
9454 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9455 struct sctp_tmit_chunk *chk, *fwd;
9456 struct mbuf *m, *endofchain;
9457 struct sctp_nets *net = NULL;
9458 uint32_t tsns_sent = 0;
9459 int no_fragmentflg, bundle_at, cnt_thru;
9461 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9462 struct sctp_auth_chunk *auth = NULL;
9463 uint32_t auth_offset = 0;
9464 uint16_t auth_keyid;
9465 int override_ok = 1;
9466 int data_auth_reqd = 0;
9469 SCTP_TCB_LOCK_ASSERT(stcb);
9470 tmr_started = ctl_cnt = bundle_at = error = 0;
9475 endofchain = m = NULL;
9476 auth_keyid = stcb->asoc.authinfo.active_keyid;
9477 #ifdef SCTP_AUDITING_ENABLED
9478 sctp_audit_log(0xC3, 1);
9480 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9481 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9482 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9483 asoc->sent_queue_retran_cnt);
9484 asoc->sent_queue_cnt = 0;
9485 asoc->sent_queue_cnt_removeable = 0;
9486 /* send back 0/0 so we enter normal transmission */
9490 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9491 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9492 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9493 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9494 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9497 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9498 if (chk != asoc->str_reset) {
9500 * not eligible for retran if its
9507 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9511 * Add an AUTH chunk, if chunk requires it save the
9512 * offset into the chain for AUTH
9514 if ((auth == NULL) &&
9515 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9516 stcb->asoc.peer_auth_chunks))) {
9517 m = sctp_add_auth_chunk(m, &endofchain,
9518 &auth, &auth_offset,
9520 chk->rec.chunk_id.id);
9521 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9523 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9529 /* do we have control chunks to retransmit? */
9531 /* Start a timer no matter if we succeed or fail */
9532 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9533 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9534 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9535 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9536 chk->snd_count++; /* update our count */
9537 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9538 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9539 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9540 no_fragmentflg, 0, 0,
9541 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9542 chk->whoTo->port, NULL,
9545 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9546 if (error == ENOBUFS) {
9547 asoc->ifp_had_enobuf = 1;
9548 SCTP_STAT_INCR(sctps_lowlevelerr);
9552 asoc->ifp_had_enobuf = 0;
9558 * We don't want to mark the net->sent time here since this
9559 * we use this for HB and retrans cannot measure RTT
9561 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9563 chk->sent = SCTP_DATAGRAM_SENT;
9564 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9568 /* Clean up the fwd-tsn list */
9569 sctp_clean_up_ctl(stcb, asoc, so_locked);
9574 * Ok, it is just data retransmission we need to do or that and a
9575 * fwd-tsn with it all.
9577 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9578 return (SCTP_RETRAN_DONE);
9580 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9581 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9582 /* not yet open, resend the cookie and that is it */
9585 #ifdef SCTP_AUDITING_ENABLED
9586 sctp_auditing(20, inp, stcb, NULL);
9588 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9589 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9590 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9591 /* No, not sent to this net or not ready for rtx */
9594 if (chk->data == NULL) {
9595 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9596 chk->rec.data.tsn, chk->snd_count, chk->sent);
9599 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9600 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9601 struct mbuf *op_err;
9602 char msg[SCTP_DIAG_INFO_LEN];
9604 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9605 chk->rec.data.tsn, chk->snd_count);
9606 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9608 atomic_add_int(&stcb->asoc.refcnt, 1);
9609 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9611 SCTP_TCB_LOCK(stcb);
9612 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9613 return (SCTP_RETRAN_EXIT);
9615 /* pick up the net */
9617 switch (net->ro._l_addr.sa.sa_family) {
9620 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9625 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9634 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9635 /* No room in peers rwnd */
9638 tsn = asoc->last_acked_seq + 1;
9639 if (tsn == chk->rec.data.tsn) {
9641 * we make a special exception for this
9642 * case. The peer has no rwnd but is missing
9643 * the lowest chunk.. which is probably what
9644 * is holding up the rwnd.
9646 goto one_chunk_around;
9651 if (asoc->peers_rwnd < mtu) {
9653 if ((asoc->peers_rwnd == 0) &&
9654 (asoc->total_flight == 0)) {
9655 chk->window_probe = 1;
9656 chk->whoTo->window_probe = 1;
9659 #ifdef SCTP_AUDITING_ENABLED
9660 sctp_audit_log(0xC3, 2);
9664 net->fast_retran_ip = 0;
9665 if (chk->rec.data.doing_fast_retransmit == 0) {
9667 * if no FR in progress skip destination that have
9668 * flight_size > cwnd.
9670 if (net->flight_size >= net->cwnd) {
9675 * Mark the destination net to have FR recovery
9679 net->fast_retran_ip = 1;
9683 * if no AUTH is yet included and this chunk requires it,
9684 * make sure to account for it. We don't apply the size
9685 * until the AUTH chunk is actually added below in case
9686 * there is no room for this chunk.
9688 if (data_auth_reqd && (auth == NULL)) {
9689 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9693 if ((chk->send_size <= (mtu - dmtu)) ||
9694 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9695 /* ok we will add this one */
9696 if (data_auth_reqd) {
9698 m = sctp_add_auth_chunk(m,
9704 auth_keyid = chk->auth_keyid;
9706 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9707 } else if (override_ok) {
9708 auth_keyid = chk->auth_keyid;
9710 } else if (chk->auth_keyid != auth_keyid) {
9711 /* different keyid, so done bundling */
9715 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9717 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9720 /* Do clear IP_DF ? */
9721 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9724 /* upate our MTU size */
9725 if (mtu > (chk->send_size + dmtu))
9726 mtu -= (chk->send_size + dmtu);
9729 data_list[bundle_at++] = chk;
9730 if (one_chunk && (asoc->total_flight <= 0)) {
9731 SCTP_STAT_INCR(sctps_windowprobed);
9734 if (one_chunk == 0) {
9736 * now are there anymore forward from chk to pick
9739 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9740 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9741 /* Nope, not for retran */
9744 if (fwd->whoTo != net) {
9745 /* Nope, not the net in question */
9748 if (data_auth_reqd && (auth == NULL)) {
9749 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9752 if (fwd->send_size <= (mtu - dmtu)) {
9753 if (data_auth_reqd) {
9755 m = sctp_add_auth_chunk(m,
9761 auth_keyid = fwd->auth_keyid;
9763 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9764 } else if (override_ok) {
9765 auth_keyid = fwd->auth_keyid;
9767 } else if (fwd->auth_keyid != auth_keyid) {
9775 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9777 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9780 /* Do clear IP_DF ? */
9781 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9784 /* upate our MTU size */
9785 if (mtu > (fwd->send_size + dmtu))
9786 mtu -= (fwd->send_size + dmtu);
9789 data_list[bundle_at++] = fwd;
9790 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9794 /* can't fit so we are done */
9799 /* Is there something to send for this destination? */
9802 * No matter if we fail/or succeed we should start a
9803 * timer. A failure is like a lost IP packet :-)
9805 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9807 * no timer running on this destination
9810 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9813 /* Now lets send it, if there is anything to send :> */
9814 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9815 (struct sockaddr *)&net->ro._l_addr, m,
9816 auth_offset, auth, auth_keyid,
9817 no_fragmentflg, 0, 0,
9818 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9822 /* error, we could not output */
9823 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9824 if (error == ENOBUFS) {
9825 asoc->ifp_had_enobuf = 1;
9826 SCTP_STAT_INCR(sctps_lowlevelerr);
9830 asoc->ifp_had_enobuf = 0;
9837 * We don't want to mark the net->sent time here
9838 * since this we use this for HB and retrans cannot
9841 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9843 /* For auto-close */
9845 if (*now_filled == 0) {
9846 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9847 *now = asoc->time_last_sent;
9850 asoc->time_last_sent = *now;
9852 *cnt_out += bundle_at;
9853 #ifdef SCTP_AUDITING_ENABLED
9854 sctp_audit_log(0xC4, bundle_at);
9857 tsns_sent = data_list[0]->rec.data.tsn;
9859 for (i = 0; i < bundle_at; i++) {
9860 SCTP_STAT_INCR(sctps_sendretransdata);
9861 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9863 * When we have a revoked data, and we
9864 * retransmit it, then we clear the revoked
9865 * flag since this flag dictates if we
9866 * subtracted from the fs
9868 if (data_list[i]->rec.data.chunk_was_revoked) {
9869 /* Deflate the cwnd */
9870 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9871 data_list[i]->rec.data.chunk_was_revoked = 0;
9873 data_list[i]->snd_count++;
9874 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9875 /* record the time */
9876 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9877 if (data_list[i]->book_size_scale) {
9879 * need to double the book size on
9882 data_list[i]->book_size_scale = 0;
9884 * Since we double the booksize, we
9885 * must also double the output queue
9886 * size, since this get shrunk when
9887 * we free by this amount.
9889 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9890 data_list[i]->book_size *= 2;
9894 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9895 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9896 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9898 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9899 (uint32_t)(data_list[i]->send_size +
9900 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9902 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9903 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9904 data_list[i]->whoTo->flight_size,
9905 data_list[i]->book_size,
9906 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9907 data_list[i]->rec.data.tsn);
9909 sctp_flight_size_increase(data_list[i]);
9910 sctp_total_flight_increase(stcb, data_list[i]);
9911 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9912 /* SWS sender side engages */
9913 asoc->peers_rwnd = 0;
9916 (data_list[i]->rec.data.doing_fast_retransmit)) {
9917 SCTP_STAT_INCR(sctps_sendfastretrans);
9918 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9919 (tmr_started == 0)) {
9921 * ok we just fast-retrans'd
9922 * the lowest TSN, i.e the
9923 * first on the list. In
9924 * this case we want to give
9925 * some more time to get a
9926 * SACK back without a
9929 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9930 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9931 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9935 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9936 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9938 #ifdef SCTP_AUDITING_ENABLED
9939 sctp_auditing(21, inp, stcb, NULL);
9945 if (asoc->sent_queue_retran_cnt <= 0) {
9946 /* all done we have no more to retran */
9947 asoc->sent_queue_retran_cnt = 0;
9951 /* No more room in rwnd */
9954 /* stop the for loop here. we sent out a packet */
9961 sctp_timer_validation(struct sctp_inpcb *inp,
9962 struct sctp_tcb *stcb,
9963 struct sctp_association *asoc)
9965 struct sctp_nets *net;
9967 /* Validate that a timer is running somewhere */
9968 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9969 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9970 /* Here is a timer */
9974 SCTP_TCB_LOCK_ASSERT(stcb);
9975 /* Gak, we did not have a timer somewhere */
9976 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9977 if (asoc->alternate) {
9978 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9980 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9986 sctp_chunk_output(struct sctp_inpcb *inp,
9987 struct sctp_tcb *stcb,
9990 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9996 * Ok this is the generic chunk service queue. we must do the
9998 * - See if there are retransmits pending, if so we must
10000 * - Service the stream queue that is next, moving any
10001 * message (note I must get a complete message i.e.
10002 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
10004 * - Check to see if the cwnd/rwnd allows any output, if so we
10005 * go ahead and fomulate and send the low level chunks. Making sure
10006 * to combine any control in the control chunk queue also.
10008 struct sctp_association *asoc;
10009 struct sctp_nets *net;
10010 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
10011 unsigned int burst_cnt = 0;
10012 struct timeval now;
10013 int now_filled = 0;
10015 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10018 unsigned int tot_frs = 0;
10020 asoc = &stcb->asoc;
10022 /* The Nagle algorithm is only applied when handling a send call. */
10023 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10024 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10032 SCTP_TCB_LOCK_ASSERT(stcb);
10034 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10036 if ((un_sent <= 0) &&
10037 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10038 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10039 (asoc->sent_queue_retran_cnt == 0) &&
10040 (asoc->trigger_reset == 0)) {
10041 /* Nothing to do unless there is something to be sent left */
10045 * Do we have something to send, data or control AND a sack timer
10046 * running, if so piggy-back the sack.
10048 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10049 sctp_send_sack(stcb, so_locked);
10050 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10052 while (asoc->sent_queue_retran_cnt) {
10054 * Ok, it is retransmission time only, we send out only ONE
10055 * packet with a single call off to the retran code.
10057 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10059 * Special hook for handling cookiess discarded
10060 * by peer that carried data. Send cookie-ack only
10061 * and then the next call with get the retran's.
10063 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10065 &now, &now_filled, frag_point, so_locked);
10067 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10068 /* if its not from a HB then do it */
10070 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10076 * its from any other place, we don't allow retran
10077 * output (only control)
10082 /* Can't send anymore */
10084 * now lets push out control by calling med-level
10085 * output once. this assures that we WILL send HB's
10088 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10090 &now, &now_filled, frag_point, so_locked);
10091 #ifdef SCTP_AUDITING_ENABLED
10092 sctp_auditing(8, inp, stcb, NULL);
10094 sctp_timer_validation(inp, stcb, asoc);
10099 * The count was off.. retran is not happening so do
10100 * the normal retransmission.
10102 #ifdef SCTP_AUDITING_ENABLED
10103 sctp_auditing(9, inp, stcb, NULL);
10105 if (ret == SCTP_RETRAN_EXIT) {
10110 if (from_where == SCTP_OUTPUT_FROM_T3) {
10111 /* Only one transmission allowed out of a timeout */
10112 #ifdef SCTP_AUDITING_ENABLED
10113 sctp_auditing(10, inp, stcb, NULL);
10115 /* Push out any control */
10116 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10117 &now, &now_filled, frag_point, so_locked);
10120 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10121 /* Hit FR burst limit */
10124 if ((num_out == 0) && (ret == 0)) {
10125 /* No more retrans to send */
10129 #ifdef SCTP_AUDITING_ENABLED
10130 sctp_auditing(12, inp, stcb, NULL);
10132 /* Check for bad destinations, if they exist move chunks around. */
10133 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10134 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10136 * if possible move things off of this address we
10137 * still may send below due to the dormant state but
10138 * we try to find an alternate address to send to
10139 * and if we have one we move all queued data on the
10140 * out wheel to this alternate address.
10142 if (net->ref_count > 1)
10143 sctp_move_chunks_from_net(stcb, net);
10146 * if ((asoc->sat_network) || (net->addr_is_local))
10147 * { burst_limit = asoc->max_burst *
10148 * SCTP_SAT_NETWORK_BURST_INCR; }
10150 if (asoc->max_burst > 0) {
10151 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10152 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10154 * JRS - Use the congestion
10155 * control given in the
10156 * congestion control module
10158 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10159 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10160 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10162 SCTP_STAT_INCR(sctps_maxburstqueued);
10164 net->fast_retran_ip = 0;
10166 if (net->flight_size == 0) {
10168 * Should be decaying the
10180 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10181 &reason_code, 0, from_where,
10182 &now, &now_filled, frag_point, so_locked);
10184 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10185 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10186 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10188 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10189 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10190 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10194 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10196 tot_out += num_out;
10198 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10199 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10200 if (num_out == 0) {
10201 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10206 * When the Nagle algorithm is used, look at how
10207 * much is unsent, then if its smaller than an MTU
10208 * and we have data in flight we stop, except if we
10209 * are handling a fragmented user message.
10211 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10212 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10213 (stcb->asoc.total_flight > 0)) {
10214 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10218 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10219 TAILQ_EMPTY(&asoc->send_queue) &&
10220 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10221 /* Nothing left to send */
10224 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10225 /* Nothing left to send */
10228 } while (num_out &&
10229 ((asoc->max_burst == 0) ||
10230 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10231 (burst_cnt < asoc->max_burst)));
10233 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10234 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10235 SCTP_STAT_INCR(sctps_maxburstqueued);
10236 asoc->burst_limit_applied = 1;
10237 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10238 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10241 asoc->burst_limit_applied = 0;
10244 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10245 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10247 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10251 * Now we need to clean up the control chunk chain if a ECNE is on
10252 * it. It must be marked as UNSENT again so next call will continue
10253 * to send it until such time that we get a CWR, to remove it.
10255 if (stcb->asoc.ecn_echo_cnt_onq)
10256 sctp_fix_ecn_echo(asoc);
10258 if (stcb->asoc.trigger_reset) {
10259 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10269 struct sctp_inpcb *inp,
10271 struct sockaddr *addr,
10272 struct mbuf *control,
10277 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10281 if (inp->sctp_socket == NULL) {
10282 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10285 return (sctp_sosend(inp->sctp_socket,
10287 (struct uio *)NULL,
10295 send_forward_tsn(struct sctp_tcb *stcb,
10296 struct sctp_association *asoc)
10298 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10299 struct sctp_forward_tsn_chunk *fwdtsn;
10300 struct sctp_strseq *strseq;
10301 struct sctp_strseq_mid *strseq_m;
10302 uint32_t advance_peer_ack_point;
10303 unsigned int cnt_of_space, i, ovh;
10304 unsigned int space_needed;
10305 unsigned int cnt_of_skipped = 0;
10307 SCTP_TCB_LOCK_ASSERT(stcb);
10308 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10309 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10310 /* mark it to unsent */
10311 chk->sent = SCTP_DATAGRAM_UNSENT;
10312 chk->snd_count = 0;
10313 /* Do we correct its output location? */
10315 sctp_free_remote_addr(chk->whoTo);
10318 goto sctp_fill_in_rest;
10321 /* Ok if we reach here we must build one */
10322 sctp_alloc_a_chunk(stcb, chk);
10326 asoc->fwd_tsn_cnt++;
10327 chk->copy_by_ref = 0;
10329 * We don't do the old thing here since this is used not for on-wire
10330 * but to tell if we are sending a fwd-tsn by the stack during
10331 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10333 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10334 chk->rec.chunk_id.can_take_data = 0;
10338 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10339 if (chk->data == NULL) {
10340 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10343 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10344 chk->sent = SCTP_DATAGRAM_UNSENT;
10345 chk->snd_count = 0;
10346 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10347 asoc->ctrl_queue_cnt++;
10350 * Here we go through and fill out the part that deals with
10351 * stream/seq of the ones we skip.
10353 SCTP_BUF_LEN(chk->data) = 0;
10354 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10355 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10356 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10357 /* no more to look at */
10360 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10361 /* We don't report these */
10366 if (asoc->idata_supported) {
10367 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10368 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10370 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10371 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10373 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10375 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10376 ovh = SCTP_MIN_OVERHEAD;
10378 ovh = SCTP_MIN_V4_OVERHEAD;
10380 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10381 /* trim to a mtu size */
10382 cnt_of_space = asoc->smallest_mtu - ovh;
10384 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10385 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10386 0xff, 0, cnt_of_skipped,
10387 asoc->advanced_peer_ack_point);
10389 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10390 if (cnt_of_space < space_needed) {
10392 * ok we must trim down the chunk by lowering the
10393 * advance peer ack point.
10395 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10396 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10397 0xff, 0xff, cnt_of_space,
10400 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10401 if (asoc->idata_supported) {
10402 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10404 cnt_of_skipped /= sizeof(struct sctp_strseq);
10407 * Go through and find the TSN that will be the one
10410 at = TAILQ_FIRST(&asoc->sent_queue);
10412 for (i = 0; i < cnt_of_skipped; i++) {
10413 tp1 = TAILQ_NEXT(at, sctp_next);
10420 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10421 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10422 0xff, cnt_of_skipped, at->rec.data.tsn,
10423 asoc->advanced_peer_ack_point);
10427 * last now points to last one I can report, update
10431 advance_peer_ack_point = last->rec.data.tsn;
10433 if (asoc->idata_supported) {
10434 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10435 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10437 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10438 cnt_of_skipped * sizeof(struct sctp_strseq);
10441 chk->send_size = space_needed;
10442 /* Setup the chunk */
10443 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10444 fwdtsn->ch.chunk_length = htons(chk->send_size);
10445 fwdtsn->ch.chunk_flags = 0;
10446 if (asoc->idata_supported) {
10447 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10449 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10451 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10452 SCTP_BUF_LEN(chk->data) = chk->send_size;
10455 * Move pointer to after the fwdtsn and transfer to the
10458 if (asoc->idata_supported) {
10459 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10462 strseq = (struct sctp_strseq *)fwdtsn;
10466 * Now populate the strseq list. This is done blindly
10467 * without pulling out duplicate stream info. This is
10468 * inefficent but won't harm the process since the peer will
10469 * look at these in sequence and will thus release anything.
10470 * It could mean we exceed the PMTU and chop off some that
10471 * we could have included.. but this is unlikely (aka 1432/4
10472 * would mean 300+ stream seq's would have to be reported in
10473 * one FWD-TSN. With a bit of work we can later FIX this to
10474 * optimize and pull out duplicates.. but it does add more
10475 * overhead. So for now... not!
10478 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10479 if (i >= cnt_of_skipped) {
10482 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10483 /* We don't report these */
10486 if (at->rec.data.tsn == advance_peer_ack_point) {
10487 at->rec.data.fwd_tsn_cnt = 0;
10489 if (asoc->idata_supported) {
10490 strseq_m->sid = htons(at->rec.data.sid);
10491 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10492 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10494 strseq_m->flags = 0;
10496 strseq_m->mid = htonl(at->rec.data.mid);
10499 strseq->sid = htons(at->rec.data.sid);
10500 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10509 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10510 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10516 * Queue up a SACK or NR-SACK in the control queue.
10517 * We must first check to see if a SACK or NR-SACK is
10518 * somehow on the control queue.
10519 * If so, we will take and and remove the old one.
10521 struct sctp_association *asoc;
10522 struct sctp_tmit_chunk *chk, *a_chk;
10523 struct sctp_sack_chunk *sack;
10524 struct sctp_nr_sack_chunk *nr_sack;
10525 struct sctp_gap_ack_block *gap_descriptor;
10526 const struct sack_track *selector;
10531 int limit_reached = 0;
10532 unsigned int i, siz, j;
10533 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10536 uint32_t highest_tsn;
10541 if (stcb->asoc.nrsack_supported == 1) {
10542 type = SCTP_NR_SELECTIVE_ACK;
10544 type = SCTP_SELECTIVE_ACK;
10547 asoc = &stcb->asoc;
10548 SCTP_TCB_LOCK_ASSERT(stcb);
10549 if (asoc->last_data_chunk_from == NULL) {
10550 /* Hmm we never received anything */
10553 sctp_slide_mapping_arrays(stcb);
10554 sctp_set_rwnd(stcb, asoc);
10555 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10556 if (chk->rec.chunk_id.id == type) {
10557 /* Hmm, found a sack already on queue, remove it */
10558 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10559 asoc->ctrl_queue_cnt--;
10562 sctp_m_freem(a_chk->data);
10563 a_chk->data = NULL;
10565 if (a_chk->whoTo) {
10566 sctp_free_remote_addr(a_chk->whoTo);
10567 a_chk->whoTo = NULL;
10572 if (a_chk == NULL) {
10573 sctp_alloc_a_chunk(stcb, a_chk);
10574 if (a_chk == NULL) {
10575 /* No memory so we drop the idea, and set a timer */
10576 if (stcb->asoc.delayed_ack) {
10577 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10578 stcb->sctp_ep, stcb, NULL,
10579 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10580 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10581 stcb->sctp_ep, stcb, NULL);
10583 stcb->asoc.send_sack = 1;
10587 a_chk->copy_by_ref = 0;
10588 a_chk->rec.chunk_id.id = type;
10589 a_chk->rec.chunk_id.can_take_data = 1;
10591 /* Clear our pkt counts */
10592 asoc->data_pkts_seen = 0;
10595 a_chk->asoc = asoc;
10596 a_chk->snd_count = 0;
10597 a_chk->send_size = 0; /* fill in later */
10598 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10599 a_chk->whoTo = NULL;
10601 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10603 * Ok, the destination for the SACK is unreachable, lets see if
10604 * we can select an alternate to asoc->last_data_chunk_from
10606 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10607 if (a_chk->whoTo == NULL) {
10608 /* Nope, no alternate */
10609 a_chk->whoTo = asoc->last_data_chunk_from;
10612 a_chk->whoTo = asoc->last_data_chunk_from;
10614 if (a_chk->whoTo) {
10615 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10617 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10618 highest_tsn = asoc->highest_tsn_inside_map;
10620 highest_tsn = asoc->highest_tsn_inside_nr_map;
10622 if (highest_tsn == asoc->cumulative_tsn) {
10624 if (type == SCTP_SELECTIVE_ACK) {
10625 space_req = sizeof(struct sctp_sack_chunk);
10627 space_req = sizeof(struct sctp_nr_sack_chunk);
10630 /* gaps get a cluster */
10631 space_req = MCLBYTES;
10633 /* Ok now lets formulate a MBUF with our sack */
10634 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10635 if ((a_chk->data == NULL) ||
10636 (a_chk->whoTo == NULL)) {
10637 /* rats, no mbuf memory */
10639 /* was a problem with the destination */
10640 sctp_m_freem(a_chk->data);
10641 a_chk->data = NULL;
10643 sctp_free_a_chunk(stcb, a_chk, so_locked);
10644 /* sa_ignore NO_NULL_CHK */
10645 if (stcb->asoc.delayed_ack) {
10646 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10647 stcb->sctp_ep, stcb, NULL,
10648 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10649 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10650 stcb->sctp_ep, stcb, NULL);
10652 stcb->asoc.send_sack = 1;
10656 /* ok, lets go through and fill it in */
10657 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10658 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10659 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10660 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10662 limit = mtod(a_chk->data, caddr_t);
10667 if ((asoc->sctp_cmt_on_off > 0) &&
10668 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10670 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10671 * received, then set high bit to 1, else 0. Reset
10674 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10675 asoc->cmt_dac_pkts_rcvd = 0;
10677 #ifdef SCTP_ASOCLOG_OF_TSNS
10678 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10679 stcb->asoc.cumack_log_atsnt++;
10680 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10681 stcb->asoc.cumack_log_atsnt = 0;
10684 /* reset the readers interpretation */
10685 stcb->freed_by_sorcv_sincelast = 0;
10687 if (type == SCTP_SELECTIVE_ACK) {
10688 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10690 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10691 if (highest_tsn > asoc->mapping_array_base_tsn) {
10692 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10694 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10698 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10699 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10700 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10701 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10703 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10707 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10710 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10712 if (((type == SCTP_SELECTIVE_ACK) &&
10713 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10714 ((type == SCTP_NR_SELECTIVE_ACK) &&
10715 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10716 /* we have a gap .. maybe */
10717 for (i = 0; i < siz; i++) {
10718 tsn_map = asoc->mapping_array[i];
10719 if (type == SCTP_SELECTIVE_ACK) {
10720 tsn_map |= asoc->nr_mapping_array[i];
10724 * Clear all bits corresponding to TSNs
10725 * smaller or equal to the cumulative TSN.
10727 tsn_map &= (~0U << (1 - offset));
10729 selector = &sack_array[tsn_map];
10730 if (mergeable && selector->right_edge) {
10732 * Backup, left and right edges were ok to
10738 if (selector->num_entries == 0)
10741 for (j = 0; j < selector->num_entries; j++) {
10742 if (mergeable && selector->right_edge) {
10744 * do a merge by NOT setting
10750 * no merge, set the left
10754 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10756 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10759 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10765 if (selector->left_edge) {
10769 if (limit_reached) {
10770 /* Reached the limit stop */
10776 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10777 (limit_reached == 0)) {
10781 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10782 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10784 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10787 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10790 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10792 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10793 /* we have a gap .. maybe */
10794 for (i = 0; i < siz; i++) {
10795 tsn_map = asoc->nr_mapping_array[i];
10798 * Clear all bits corresponding to
10799 * TSNs smaller or equal to the
10802 tsn_map &= (~0U << (1 - offset));
10804 selector = &sack_array[tsn_map];
10805 if (mergeable && selector->right_edge) {
10807 * Backup, left and right edges were
10810 num_nr_gap_blocks--;
10813 if (selector->num_entries == 0)
10816 for (j = 0; j < selector->num_entries; j++) {
10817 if (mergeable && selector->right_edge) {
10819 * do a merge by NOT
10826 * no merge, set the
10830 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10832 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10833 num_nr_gap_blocks++;
10835 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10841 if (selector->left_edge) {
10845 if (limit_reached) {
10846 /* Reached the limit stop */
10853 /* now we must add any dups we are going to report. */
10854 if ((limit_reached == 0) && (asoc->numduptsns)) {
10855 dup = (uint32_t *)gap_descriptor;
10856 for (i = 0; i < asoc->numduptsns; i++) {
10857 *dup = htonl(asoc->dup_tsns[i]);
10860 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10865 asoc->numduptsns = 0;
10868 * now that the chunk is prepared queue it to the control chunk
10871 if (type == SCTP_SELECTIVE_ACK) {
10872 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10873 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10874 num_dups * sizeof(int32_t));
10875 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10876 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10877 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10878 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10879 sack->sack.num_dup_tsns = htons(num_dups);
10880 sack->ch.chunk_type = type;
10881 sack->ch.chunk_flags = flags;
10882 sack->ch.chunk_length = htons(a_chk->send_size);
10884 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10885 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10886 num_dups * sizeof(int32_t));
10887 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10888 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10889 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10890 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10891 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10892 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10893 nr_sack->nr_sack.reserved = 0;
10894 nr_sack->ch.chunk_type = type;
10895 nr_sack->ch.chunk_flags = flags;
10896 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10898 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10899 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10900 asoc->ctrl_queue_cnt++;
10901 asoc->send_sack = 0;
10902 SCTP_STAT_INCR(sctps_sendsacks);
10907 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10908 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10913 struct mbuf *m_abort, *m, *m_last;
10914 struct mbuf *m_out, *m_end = NULL;
10915 struct sctp_abort_chunk *abort;
10916 struct sctp_auth_chunk *auth = NULL;
10917 struct sctp_nets *net;
10919 uint32_t auth_offset = 0;
10921 uint16_t cause_len, chunk_len, padding_len;
10923 SCTP_TCB_LOCK_ASSERT(stcb);
10925 * Add an AUTH chunk, if chunk requires it and save the offset into
10926 * the chain for AUTH
10928 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10929 stcb->asoc.peer_auth_chunks)) {
10930 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10931 stcb, SCTP_ABORT_ASSOCIATION);
10932 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10936 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10937 if (m_abort == NULL) {
10939 sctp_m_freem(m_out);
10942 sctp_m_freem(operr);
10946 /* link in any error */
10947 SCTP_BUF_NEXT(m_abort) = operr;
10950 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10951 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10952 if (SCTP_BUF_NEXT(m) == NULL) {
10956 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10957 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10958 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10959 if (m_out == NULL) {
10960 /* NO Auth chunk prepended, so reserve space in front */
10961 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10964 /* Put AUTH chunk at the front of the chain */
10965 SCTP_BUF_NEXT(m_end) = m_abort;
10967 if (stcb->asoc.alternate) {
10968 net = stcb->asoc.alternate;
10970 net = stcb->asoc.primary_destination;
10972 /* Fill in the ABORT chunk header. */
10973 abort = mtod(m_abort, struct sctp_abort_chunk *);
10974 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10975 if (stcb->asoc.peer_vtag == 0) {
10976 /* This happens iff the assoc is in COOKIE-WAIT state. */
10977 vtag = stcb->asoc.my_vtag;
10978 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10980 vtag = stcb->asoc.peer_vtag;
10981 abort->ch.chunk_flags = 0;
10983 abort->ch.chunk_length = htons(chunk_len);
10984 /* Add padding, if necessary. */
10985 if (padding_len > 0) {
10986 if ((m_last == NULL) ||
10987 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10988 sctp_m_freem(m_out);
10992 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10993 (struct sockaddr *)&net->ro._l_addr,
10994 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10995 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10996 stcb->asoc.primary_destination->port, NULL,
10999 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11000 if (error == ENOBUFS) {
11001 stcb->asoc.ifp_had_enobuf = 1;
11002 SCTP_STAT_INCR(sctps_lowlevelerr);
11005 stcb->asoc.ifp_had_enobuf = 0;
11007 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11011 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11012 struct sctp_nets *net,
11015 /* formulate and SEND a SHUTDOWN-COMPLETE */
11016 struct mbuf *m_shutdown_comp;
11017 struct sctp_shutdown_complete_chunk *shutdown_complete;
11022 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11023 if (m_shutdown_comp == NULL) {
11027 if (reflect_vtag) {
11028 flags = SCTP_HAD_NO_TCB;
11029 vtag = stcb->asoc.my_vtag;
11032 vtag = stcb->asoc.peer_vtag;
11034 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11035 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11036 shutdown_complete->ch.chunk_flags = flags;
11037 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11038 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11039 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11040 (struct sockaddr *)&net->ro._l_addr,
11041 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11042 stcb->sctp_ep->sctp_lport, stcb->rport,
11046 SCTP_SO_NOT_LOCKED))) {
11047 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11048 if (error == ENOBUFS) {
11049 stcb->asoc.ifp_had_enobuf = 1;
11050 SCTP_STAT_INCR(sctps_lowlevelerr);
11053 stcb->asoc.ifp_had_enobuf = 0;
11055 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11060 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11061 struct sctphdr *sh, uint32_t vtag,
11062 uint8_t type, struct mbuf *cause,
11063 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11064 uint32_t vrf_id, uint16_t port)
11066 struct mbuf *o_pak;
11068 struct sctphdr *shout;
11069 struct sctp_chunkhdr *ch;
11070 #if defined(INET) || defined(INET6)
11071 struct udphdr *udp;
11073 int ret, len, cause_len, padding_len;
11075 struct sockaddr_in *src_sin, *dst_sin;
11079 struct sockaddr_in6 *src_sin6, *dst_sin6;
11080 struct ip6_hdr *ip6;
11083 /* Compute the length of the cause and add final padding. */
11085 if (cause != NULL) {
11086 struct mbuf *m_at, *m_last = NULL;
11088 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11089 if (SCTP_BUF_NEXT(m_at) == NULL)
11091 cause_len += SCTP_BUF_LEN(m_at);
11093 padding_len = cause_len % 4;
11094 if (padding_len != 0) {
11095 padding_len = 4 - padding_len;
11097 if (padding_len != 0) {
11098 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11099 sctp_m_freem(cause);
11106 /* Get an mbuf for the header. */
11107 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11108 switch (dst->sa_family) {
11111 len += sizeof(struct ip);
11116 len += sizeof(struct ip6_hdr);
11122 #if defined(INET) || defined(INET6)
11124 len += sizeof(struct udphdr);
11127 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11128 if (mout == NULL) {
11130 sctp_m_freem(cause);
11134 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11135 SCTP_BUF_LEN(mout) = len;
11136 SCTP_BUF_NEXT(mout) = cause;
11137 M_SETFIB(mout, fibnum);
11138 mout->m_pkthdr.flowid = mflowid;
11139 M_HASHTYPE_SET(mout, mflowtype);
11146 switch (dst->sa_family) {
11149 src_sin = (struct sockaddr_in *)src;
11150 dst_sin = (struct sockaddr_in *)dst;
11151 ip = mtod(mout, struct ip *);
11152 ip->ip_v = IPVERSION;
11153 ip->ip_hl = (sizeof(struct ip) >> 2);
11155 ip->ip_off = htons(IP_DF);
11157 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11159 ip->ip_p = IPPROTO_UDP;
11161 ip->ip_p = IPPROTO_SCTP;
11163 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11164 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11166 len = sizeof(struct ip);
11167 shout = (struct sctphdr *)((caddr_t)ip + len);
11172 src_sin6 = (struct sockaddr_in6 *)src;
11173 dst_sin6 = (struct sockaddr_in6 *)dst;
11174 ip6 = mtod(mout, struct ip6_hdr *);
11175 ip6->ip6_flow = htonl(0x60000000);
11176 if (V_ip6_auto_flowlabel) {
11177 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11179 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11181 ip6->ip6_nxt = IPPROTO_UDP;
11183 ip6->ip6_nxt = IPPROTO_SCTP;
11185 ip6->ip6_src = dst_sin6->sin6_addr;
11186 ip6->ip6_dst = src_sin6->sin6_addr;
11187 len = sizeof(struct ip6_hdr);
11188 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11193 shout = mtod(mout, struct sctphdr *);
11196 #if defined(INET) || defined(INET6)
11198 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11199 sctp_m_freem(mout);
11202 udp = (struct udphdr *)shout;
11203 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11204 udp->uh_dport = port;
11206 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11207 sizeof(struct sctphdr) +
11208 sizeof(struct sctp_chunkhdr) +
11209 cause_len + padding_len));
11210 len += sizeof(struct udphdr);
11211 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11216 shout->src_port = sh->dest_port;
11217 shout->dest_port = sh->src_port;
11218 shout->checksum = 0;
11220 shout->v_tag = htonl(vtag);
11222 shout->v_tag = sh->v_tag;
11224 len += sizeof(struct sctphdr);
11225 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11226 ch->chunk_type = type;
11228 ch->chunk_flags = 0;
11230 ch->chunk_flags = SCTP_HAD_NO_TCB;
11232 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11233 len += sizeof(struct sctp_chunkhdr);
11234 len += cause_len + padding_len;
11236 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11237 sctp_m_freem(mout);
11240 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11241 switch (dst->sa_family) {
11246 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11251 ip->ip_len = htons(len);
11253 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11254 SCTP_STAT_INCR(sctps_sendswcrc);
11256 SCTP_ENABLE_UDP_CSUM(o_pak);
11259 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11260 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11261 SCTP_STAT_INCR(sctps_sendhwcrc);
11263 #ifdef SCTP_PACKET_LOGGING
11264 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11265 sctp_packet_log(o_pak);
11268 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11269 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11274 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11276 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11277 SCTP_STAT_INCR(sctps_sendswcrc);
11278 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11279 udp->uh_sum = 0xffff;
11282 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11283 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11284 SCTP_STAT_INCR(sctps_sendhwcrc);
11286 #ifdef SCTP_PACKET_LOGGING
11287 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11288 sctp_packet_log(o_pak);
11291 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11292 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11296 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11298 sctp_m_freem(mout);
11299 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11304 UDPSTAT_INC(udps_opackets);
11306 SCTP_STAT_INCR(sctps_sendpackets);
11307 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11308 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11310 SCTP_STAT_INCR(sctps_senderrors);
11316 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11317 struct sctphdr *sh,
11318 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11319 uint32_t vrf_id, uint16_t port)
11321 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11322 mflowtype, mflowid, fibnum,
11327 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11328 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11333 struct sctp_tmit_chunk *chk;
11334 struct sctp_heartbeat_chunk *hb;
11335 struct timeval now;
11337 SCTP_TCB_LOCK_ASSERT(stcb);
11341 (void)SCTP_GETTIME_TIMEVAL(&now);
11342 switch (net->ro._l_addr.sa.sa_family) {
11354 sctp_alloc_a_chunk(stcb, chk);
11356 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11360 chk->copy_by_ref = 0;
11361 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11362 chk->rec.chunk_id.can_take_data = 1;
11364 chk->asoc = &stcb->asoc;
11365 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11367 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11368 if (chk->data == NULL) {
11369 sctp_free_a_chunk(stcb, chk, so_locked);
11372 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11373 SCTP_BUF_LEN(chk->data) = chk->send_size;
11374 chk->sent = SCTP_DATAGRAM_UNSENT;
11375 chk->snd_count = 0;
11377 atomic_add_int(&chk->whoTo->ref_count, 1);
11378 /* Now we have a mbuf that we can fill in with the details */
11379 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11380 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11381 /* fill out chunk header */
11382 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11383 hb->ch.chunk_flags = 0;
11384 hb->ch.chunk_length = htons(chk->send_size);
11385 /* Fill out hb parameter */
11386 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11387 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11388 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11389 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11390 /* Did our user request this one, put it in */
11391 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11392 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11393 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11395 * we only take from the entropy pool if the address is not
11398 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11399 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11401 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11402 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11404 switch (net->ro._l_addr.sa.sa_family) {
11407 memcpy(hb->heartbeat.hb_info.address,
11408 &net->ro._l_addr.sin.sin_addr,
11409 sizeof(net->ro._l_addr.sin.sin_addr));
11414 memcpy(hb->heartbeat.hb_info.address,
11415 &net->ro._l_addr.sin6.sin6_addr,
11416 sizeof(net->ro._l_addr.sin6.sin6_addr));
11421 sctp_m_freem(chk->data);
11424 sctp_free_a_chunk(stcb, chk, so_locked);
11428 net->hb_responded = 0;
11429 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11430 stcb->asoc.ctrl_queue_cnt++;
11431 SCTP_STAT_INCR(sctps_sendheartbeat);
11436 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11439 struct sctp_association *asoc;
11440 struct sctp_ecne_chunk *ecne;
11441 struct sctp_tmit_chunk *chk;
11446 asoc = &stcb->asoc;
11447 SCTP_TCB_LOCK_ASSERT(stcb);
11448 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11449 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11450 /* found a previous ECN_ECHO update it if needed */
11451 uint32_t cnt, ctsn;
11453 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11454 ctsn = ntohl(ecne->tsn);
11455 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11456 ecne->tsn = htonl(high_tsn);
11457 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11459 cnt = ntohl(ecne->num_pkts_since_cwr);
11461 ecne->num_pkts_since_cwr = htonl(cnt);
11465 /* nope could not find one to update so we must build one */
11466 sctp_alloc_a_chunk(stcb, chk);
11470 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11471 chk->copy_by_ref = 0;
11472 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11473 chk->rec.chunk_id.can_take_data = 0;
11475 chk->asoc = &stcb->asoc;
11476 chk->send_size = sizeof(struct sctp_ecne_chunk);
11477 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11478 if (chk->data == NULL) {
11479 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11482 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11483 SCTP_BUF_LEN(chk->data) = chk->send_size;
11484 chk->sent = SCTP_DATAGRAM_UNSENT;
11485 chk->snd_count = 0;
11487 atomic_add_int(&chk->whoTo->ref_count, 1);
11489 stcb->asoc.ecn_echo_cnt_onq++;
11490 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11491 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11492 ecne->ch.chunk_flags = 0;
11493 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11494 ecne->tsn = htonl(high_tsn);
11495 ecne->num_pkts_since_cwr = htonl(1);
11496 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11497 asoc->ctrl_queue_cnt++;
11501 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11502 struct mbuf *m, int len, int iphlen, int bad_crc)
11504 struct sctp_association *asoc;
11505 struct sctp_pktdrop_chunk *drp;
11506 struct sctp_tmit_chunk *chk;
11512 struct sctp_chunkhdr *ch, chunk_buf;
11513 unsigned int chk_length;
11518 asoc = &stcb->asoc;
11519 SCTP_TCB_LOCK_ASSERT(stcb);
11520 if (asoc->pktdrop_supported == 0) {
11522 * peer must declare support before I send one.
11526 if (stcb->sctp_socket == NULL) {
11529 sctp_alloc_a_chunk(stcb, chk);
11533 chk->copy_by_ref = 0;
11534 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11535 chk->rec.chunk_id.can_take_data = 1;
11538 chk->send_size = len;
11539 /* Validate that we do not have an ABORT in here. */
11540 offset = iphlen + sizeof(struct sctphdr);
11541 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11542 sizeof(*ch), (uint8_t *)&chunk_buf);
11543 while (ch != NULL) {
11544 chk_length = ntohs(ch->chunk_length);
11545 if (chk_length < sizeof(*ch)) {
11546 /* break to abort land */
11549 switch (ch->chunk_type) {
11550 case SCTP_PACKET_DROPPED:
11551 case SCTP_ABORT_ASSOCIATION:
11552 case SCTP_INITIATION_ACK:
11554 * We don't respond with an PKT-DROP to an ABORT
11555 * or PKT-DROP. We also do not respond to an
11556 * INIT-ACK, because we can't know if the initiation
11557 * tag is correct or not.
11559 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11564 offset += SCTP_SIZE32(chk_length);
11565 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11566 sizeof(*ch), (uint8_t *)&chunk_buf);
11569 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11570 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11572 * only send 1 mtu worth, trim off the excess on the end.
11575 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11578 chk->asoc = &stcb->asoc;
11579 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11580 if (chk->data == NULL) {
11582 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11585 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11586 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11588 sctp_m_freem(chk->data);
11592 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11593 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11594 chk->book_size_scale = 0;
11596 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11597 drp->trunc_len = htons(fullsz);
11599 * Len is already adjusted to size minus overhead above take
11600 * out the pkt_drop chunk itself from it.
11602 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11603 len = chk->send_size;
11605 /* no truncation needed */
11606 drp->ch.chunk_flags = 0;
11607 drp->trunc_len = htons(0);
11610 drp->ch.chunk_flags |= SCTP_BADCRC;
11612 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11613 SCTP_BUF_LEN(chk->data) = chk->send_size;
11614 chk->sent = SCTP_DATAGRAM_UNSENT;
11615 chk->snd_count = 0;
11617 /* we should hit here */
11619 atomic_add_int(&chk->whoTo->ref_count, 1);
11623 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11624 drp->ch.chunk_length = htons(chk->send_size);
11625 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11629 drp->bottle_bw = htonl(spc);
11630 if (asoc->my_rwnd) {
11631 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11632 asoc->size_on_all_streams +
11633 asoc->my_rwnd_control_len +
11634 stcb->sctp_socket->so_rcv.sb_cc);
11637 * If my rwnd is 0, possibly from mbuf depletion as well as
11638 * space used, tell the peer there is NO space aka onq == bw
11640 drp->current_onq = htonl(spc);
11644 m_copydata(m, iphlen, len, (caddr_t)datap);
11645 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11646 asoc->ctrl_queue_cnt++;
11650 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11652 struct sctp_association *asoc;
11653 struct sctp_cwr_chunk *cwr;
11654 struct sctp_tmit_chunk *chk;
11656 SCTP_TCB_LOCK_ASSERT(stcb);
11660 asoc = &stcb->asoc;
11661 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11662 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11664 * found a previous CWR queued to same destination
11665 * update it if needed
11669 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11670 ctsn = ntohl(cwr->tsn);
11671 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11672 cwr->tsn = htonl(high_tsn);
11674 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11675 /* Make sure override is carried */
11676 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11681 sctp_alloc_a_chunk(stcb, chk);
11685 chk->copy_by_ref = 0;
11686 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11687 chk->rec.chunk_id.can_take_data = 1;
11689 chk->asoc = &stcb->asoc;
11690 chk->send_size = sizeof(struct sctp_cwr_chunk);
11691 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11692 if (chk->data == NULL) {
11693 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11696 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11697 SCTP_BUF_LEN(chk->data) = chk->send_size;
11698 chk->sent = SCTP_DATAGRAM_UNSENT;
11699 chk->snd_count = 0;
11701 atomic_add_int(&chk->whoTo->ref_count, 1);
11702 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11703 cwr->ch.chunk_type = SCTP_ECN_CWR;
11704 cwr->ch.chunk_flags = override;
11705 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11706 cwr->tsn = htonl(high_tsn);
11707 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11708 asoc->ctrl_queue_cnt++;
11712 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11713 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11715 uint16_t len, old_len, i;
11716 struct sctp_stream_reset_out_request *req_out;
11717 struct sctp_chunkhdr *ch;
11719 int number_entries = 0;
11721 ch = mtod(chk->data, struct sctp_chunkhdr *);
11722 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11723 /* get to new offset for the param. */
11724 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11725 /* now how long will this param be? */
11726 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11727 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11728 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11729 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11733 if (number_entries == 0) {
11736 if (number_entries == stcb->asoc.streamoutcnt) {
11737 number_entries = 0;
11739 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11740 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11742 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11743 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11744 req_out->ph.param_length = htons(len);
11745 req_out->request_seq = htonl(seq);
11746 req_out->response_seq = htonl(resp_seq);
11747 req_out->send_reset_at_tsn = htonl(last_sent);
11749 if (number_entries) {
11750 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11751 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11752 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11753 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11754 req_out->list_of_streams[at] = htons(i);
11756 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11757 if (at >= number_entries) {
11763 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11764 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11767 if (SCTP_SIZE32(len) > len) {
11769 * Need to worry about the pad we may end up adding to the
11770 * end. This is easy since the struct is either aligned to 4
11771 * bytes or 2 bytes off.
11773 req_out->list_of_streams[number_entries] = 0;
11775 /* now fix the chunk length */
11776 ch->chunk_length = htons(len + old_len);
11777 chk->book_size = len + old_len;
11778 chk->book_size_scale = 0;
11779 chk->send_size = SCTP_SIZE32(chk->book_size);
11780 SCTP_BUF_LEN(chk->data) = chk->send_size;
11785 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11786 int number_entries, uint16_t *list,
11789 uint16_t len, old_len, i;
11790 struct sctp_stream_reset_in_request *req_in;
11791 struct sctp_chunkhdr *ch;
11793 ch = mtod(chk->data, struct sctp_chunkhdr *);
11794 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11796 /* get to new offset for the param. */
11797 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11798 /* now how long will this param be? */
11799 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11800 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11801 req_in->ph.param_length = htons(len);
11802 req_in->request_seq = htonl(seq);
11803 if (number_entries) {
11804 for (i = 0; i < number_entries; i++) {
11805 req_in->list_of_streams[i] = htons(list[i]);
11808 if (SCTP_SIZE32(len) > len) {
11810 * Need to worry about the pad we may end up adding to the
11811 * end. This is easy since the struct is either aligned to 4
11812 * bytes or 2 bytes off.
11814 req_in->list_of_streams[number_entries] = 0;
11816 /* now fix the chunk length */
11817 ch->chunk_length = htons(len + old_len);
11818 chk->book_size = len + old_len;
11819 chk->book_size_scale = 0;
11820 chk->send_size = SCTP_SIZE32(chk->book_size);
11821 SCTP_BUF_LEN(chk->data) = chk->send_size;
11826 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11829 uint16_t len, old_len;
11830 struct sctp_stream_reset_tsn_request *req_tsn;
11831 struct sctp_chunkhdr *ch;
11833 ch = mtod(chk->data, struct sctp_chunkhdr *);
11834 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11836 /* get to new offset for the param. */
11837 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11838 /* now how long will this param be? */
11839 len = sizeof(struct sctp_stream_reset_tsn_request);
11840 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11841 req_tsn->ph.param_length = htons(len);
11842 req_tsn->request_seq = htonl(seq);
11844 /* now fix the chunk length */
11845 ch->chunk_length = htons(len + old_len);
11846 chk->send_size = len + old_len;
11847 chk->book_size = SCTP_SIZE32(chk->send_size);
11848 chk->book_size_scale = 0;
11849 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11854 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11855 uint32_t resp_seq, uint32_t result)
11857 uint16_t len, old_len;
11858 struct sctp_stream_reset_response *resp;
11859 struct sctp_chunkhdr *ch;
11861 ch = mtod(chk->data, struct sctp_chunkhdr *);
11862 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11864 /* get to new offset for the param. */
11865 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11866 /* now how long will this param be? */
11867 len = sizeof(struct sctp_stream_reset_response);
11868 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11869 resp->ph.param_length = htons(len);
11870 resp->response_seq = htonl(resp_seq);
11871 resp->result = ntohl(result);
11873 /* now fix the chunk length */
11874 ch->chunk_length = htons(len + old_len);
11875 chk->book_size = len + old_len;
11876 chk->book_size_scale = 0;
11877 chk->send_size = SCTP_SIZE32(chk->book_size);
11878 SCTP_BUF_LEN(chk->data) = chk->send_size;
11883 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11884 struct sctp_stream_reset_list *ent,
11887 struct sctp_association *asoc;
11888 struct sctp_tmit_chunk *chk;
11889 struct sctp_chunkhdr *ch;
11891 asoc = &stcb->asoc;
11894 * Reset our last reset action to the new one IP -> response
11895 * (PERFORMED probably). This assures that if we fail to send, a
11896 * retran from the peer will get the new response.
11898 asoc->last_reset_action[0] = response;
11899 if (asoc->stream_reset_outstanding) {
11902 sctp_alloc_a_chunk(stcb, chk);
11904 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11907 chk->copy_by_ref = 0;
11908 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11909 chk->rec.chunk_id.can_take_data = 0;
11911 chk->asoc = &stcb->asoc;
11912 chk->book_size = sizeof(struct sctp_chunkhdr);
11913 chk->send_size = SCTP_SIZE32(chk->book_size);
11914 chk->book_size_scale = 0;
11915 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11916 if (chk->data == NULL) {
11917 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11918 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11921 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11922 /* setup chunk parameters */
11923 chk->sent = SCTP_DATAGRAM_UNSENT;
11924 chk->snd_count = 0;
11925 if (stcb->asoc.alternate) {
11926 chk->whoTo = stcb->asoc.alternate;
11928 chk->whoTo = stcb->asoc.primary_destination;
11930 ch = mtod(chk->data, struct sctp_chunkhdr *);
11931 ch->chunk_type = SCTP_STREAM_RESET;
11932 ch->chunk_flags = 0;
11933 ch->chunk_length = htons(chk->book_size);
11934 atomic_add_int(&chk->whoTo->ref_count, 1);
11935 SCTP_BUF_LEN(chk->data) = chk->send_size;
11936 sctp_add_stream_reset_result(chk, ent->seq, response);
11937 /* insert the chunk for sending */
11938 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11941 asoc->ctrl_queue_cnt++;
11945 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11946 uint32_t resp_seq, uint32_t result,
11947 uint32_t send_una, uint32_t recv_next)
11949 uint16_t len, old_len;
11950 struct sctp_stream_reset_response_tsn *resp;
11951 struct sctp_chunkhdr *ch;
11953 ch = mtod(chk->data, struct sctp_chunkhdr *);
11954 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11956 /* get to new offset for the param. */
11957 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11958 /* now how long will this param be? */
11959 len = sizeof(struct sctp_stream_reset_response_tsn);
11960 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11961 resp->ph.param_length = htons(len);
11962 resp->response_seq = htonl(resp_seq);
11963 resp->result = htonl(result);
11964 resp->senders_next_tsn = htonl(send_una);
11965 resp->receivers_next_tsn = htonl(recv_next);
11967 /* now fix the chunk length */
11968 ch->chunk_length = htons(len + old_len);
11969 chk->book_size = len + old_len;
11970 chk->send_size = SCTP_SIZE32(chk->book_size);
11971 chk->book_size_scale = 0;
11972 SCTP_BUF_LEN(chk->data) = chk->send_size;
11977 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11981 uint16_t len, old_len;
11982 struct sctp_chunkhdr *ch;
11983 struct sctp_stream_reset_add_strm *addstr;
11985 ch = mtod(chk->data, struct sctp_chunkhdr *);
11986 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11988 /* get to new offset for the param. */
11989 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11990 /* now how long will this param be? */
11991 len = sizeof(struct sctp_stream_reset_add_strm);
11994 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11995 addstr->ph.param_length = htons(len);
11996 addstr->request_seq = htonl(seq);
11997 addstr->number_of_streams = htons(adding);
11998 addstr->reserved = 0;
12000 /* now fix the chunk length */
12001 ch->chunk_length = htons(len + old_len);
12002 chk->send_size = len + old_len;
12003 chk->book_size = SCTP_SIZE32(chk->send_size);
12004 chk->book_size_scale = 0;
12005 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12010 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
12014 uint16_t len, old_len;
12015 struct sctp_chunkhdr *ch;
12016 struct sctp_stream_reset_add_strm *addstr;
12018 ch = mtod(chk->data, struct sctp_chunkhdr *);
12019 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12021 /* get to new offset for the param. */
12022 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12023 /* now how long will this param be? */
12024 len = sizeof(struct sctp_stream_reset_add_strm);
12026 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12027 addstr->ph.param_length = htons(len);
12028 addstr->request_seq = htonl(seq);
12029 addstr->number_of_streams = htons(adding);
12030 addstr->reserved = 0;
12032 /* now fix the chunk length */
12033 ch->chunk_length = htons(len + old_len);
12034 chk->send_size = len + old_len;
12035 chk->book_size = SCTP_SIZE32(chk->send_size);
12036 chk->book_size_scale = 0;
12037 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12042 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12044 struct sctp_association *asoc;
12045 struct sctp_tmit_chunk *chk;
12046 struct sctp_chunkhdr *ch;
12049 asoc = &stcb->asoc;
12050 asoc->trigger_reset = 0;
12051 if (asoc->stream_reset_outstanding) {
12054 sctp_alloc_a_chunk(stcb, chk);
12056 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12059 chk->copy_by_ref = 0;
12060 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12061 chk->rec.chunk_id.can_take_data = 0;
12063 chk->asoc = &stcb->asoc;
12064 chk->book_size = sizeof(struct sctp_chunkhdr);
12065 chk->send_size = SCTP_SIZE32(chk->book_size);
12066 chk->book_size_scale = 0;
12067 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12068 if (chk->data == NULL) {
12069 sctp_free_a_chunk(stcb, chk, so_locked);
12070 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12073 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12075 /* setup chunk parameters */
12076 chk->sent = SCTP_DATAGRAM_UNSENT;
12077 chk->snd_count = 0;
12078 if (stcb->asoc.alternate) {
12079 chk->whoTo = stcb->asoc.alternate;
12081 chk->whoTo = stcb->asoc.primary_destination;
12083 ch = mtod(chk->data, struct sctp_chunkhdr *);
12084 ch->chunk_type = SCTP_STREAM_RESET;
12085 ch->chunk_flags = 0;
12086 ch->chunk_length = htons(chk->book_size);
12087 atomic_add_int(&chk->whoTo->ref_count, 1);
12088 SCTP_BUF_LEN(chk->data) = chk->send_size;
12089 seq = stcb->asoc.str_reset_seq_out;
12090 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12092 asoc->stream_reset_outstanding++;
12094 m_freem(chk->data);
12096 sctp_free_a_chunk(stcb, chk, so_locked);
12099 asoc->str_reset = chk;
12100 /* insert the chunk for sending */
12101 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12104 asoc->ctrl_queue_cnt++;
12106 if (stcb->asoc.send_sack) {
12107 sctp_send_sack(stcb, so_locked);
12109 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12114 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12115 uint16_t number_entries, uint16_t *list,
12116 uint8_t send_in_req,
12117 uint8_t send_tsn_req,
12118 uint8_t add_stream,
12120 uint16_t adding_i, uint8_t peer_asked)
12122 struct sctp_association *asoc;
12123 struct sctp_tmit_chunk *chk;
12124 struct sctp_chunkhdr *ch;
12125 int can_send_out_req = 0;
12128 asoc = &stcb->asoc;
12129 if (asoc->stream_reset_outstanding) {
12131 * Already one pending, must get ACK back to clear the flag.
12133 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12136 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12137 (add_stream == 0)) {
12138 /* nothing to do */
12139 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12142 if (send_tsn_req && send_in_req) {
12143 /* error, can't do that */
12144 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12146 } else if (send_in_req) {
12147 can_send_out_req = 1;
12149 if (number_entries > (MCLBYTES -
12150 SCTP_MIN_OVERHEAD -
12151 sizeof(struct sctp_chunkhdr) -
12152 sizeof(struct sctp_stream_reset_out_request)) /
12153 sizeof(uint16_t)) {
12154 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12157 sctp_alloc_a_chunk(stcb, chk);
12159 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12162 chk->copy_by_ref = 0;
12163 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12164 chk->rec.chunk_id.can_take_data = 0;
12166 chk->asoc = &stcb->asoc;
12167 chk->book_size = sizeof(struct sctp_chunkhdr);
12168 chk->send_size = SCTP_SIZE32(chk->book_size);
12169 chk->book_size_scale = 0;
12170 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12171 if (chk->data == NULL) {
12172 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12173 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12176 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12178 /* setup chunk parameters */
12179 chk->sent = SCTP_DATAGRAM_UNSENT;
12180 chk->snd_count = 0;
12181 if (stcb->asoc.alternate) {
12182 chk->whoTo = stcb->asoc.alternate;
12184 chk->whoTo = stcb->asoc.primary_destination;
12186 atomic_add_int(&chk->whoTo->ref_count, 1);
12187 ch = mtod(chk->data, struct sctp_chunkhdr *);
12188 ch->chunk_type = SCTP_STREAM_RESET;
12189 ch->chunk_flags = 0;
12190 ch->chunk_length = htons(chk->book_size);
12191 SCTP_BUF_LEN(chk->data) = chk->send_size;
12193 seq = stcb->asoc.str_reset_seq_out;
12194 if (can_send_out_req) {
12197 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12200 asoc->stream_reset_outstanding++;
12203 if ((add_stream & 1) &&
12204 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12205 /* Need to allocate more */
12206 struct sctp_stream_out *oldstream;
12207 struct sctp_stream_queue_pending *sp, *nsp;
12209 #if defined(SCTP_DETAILED_STR_STATS)
12213 oldstream = stcb->asoc.strmout;
12214 /* get some more */
12215 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12216 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12218 if (stcb->asoc.strmout == NULL) {
12221 stcb->asoc.strmout = oldstream;
12222 /* Turn off the bit */
12223 x = add_stream & 0xfe;
12228 * Ok now we proceed with copying the old out stuff and
12229 * initializing the new stuff.
12231 SCTP_TCB_SEND_LOCK(stcb);
12232 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12233 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12234 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12235 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12236 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12237 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12238 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12239 stcb->asoc.strmout[i].sid = i;
12240 stcb->asoc.strmout[i].state = oldstream[i].state;
12241 /* FIX ME FIX ME */
12243 * This should be a SS_COPY operation FIX ME STREAM
12246 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12247 /* now anything on those queues? */
12248 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12249 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12250 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12254 /* now the new streams */
12255 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12256 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12257 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12258 stcb->asoc.strmout[i].chunks_on_queues = 0;
12259 #if defined(SCTP_DETAILED_STR_STATS)
12260 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12261 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12262 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12265 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12266 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12268 stcb->asoc.strmout[i].next_mid_ordered = 0;
12269 stcb->asoc.strmout[i].next_mid_unordered = 0;
12270 stcb->asoc.strmout[i].sid = i;
12271 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12272 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12273 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12275 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12276 SCTP_FREE(oldstream, SCTP_M_STRMO);
12277 SCTP_TCB_SEND_UNLOCK(stcb);
12280 if ((add_stream & 1) && (adding_o > 0)) {
12281 asoc->strm_pending_add_size = adding_o;
12282 asoc->peer_req_out = peer_asked;
12283 sctp_add_an_out_stream(chk, seq, adding_o);
12285 asoc->stream_reset_outstanding++;
12287 if ((add_stream & 2) && (adding_i > 0)) {
12288 sctp_add_an_in_stream(chk, seq, adding_i);
12290 asoc->stream_reset_outstanding++;
12293 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12295 asoc->stream_reset_outstanding++;
12297 if (send_tsn_req) {
12298 sctp_add_stream_reset_tsn(chk, seq);
12299 asoc->stream_reset_outstanding++;
12301 asoc->str_reset = chk;
12302 /* insert the chunk for sending */
12303 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12306 asoc->ctrl_queue_cnt++;
12307 if (stcb->asoc.send_sack) {
12308 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12310 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12315 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12316 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12317 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12318 uint32_t vrf_id, uint16_t port)
12320 /* Don't respond to an ABORT with an ABORT. */
12321 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12323 sctp_m_freem(cause);
12326 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12327 mflowtype, mflowid, fibnum,
12333 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12334 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12335 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12336 uint32_t vrf_id, uint16_t port)
12338 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12339 mflowtype, mflowid, fibnum,
12344 static struct mbuf *
12345 sctp_copy_resume(struct uio *uio,
12347 int user_marks_eor,
12350 struct mbuf **new_tail)
12354 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12355 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12357 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12360 *sndout = m_length(m, NULL);
12361 *new_tail = m_last(m);
12367 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12371 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12373 if (sp->data == NULL) {
12374 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12378 sp->tail_mbuf = m_last(sp->data);
12384 static struct sctp_stream_queue_pending *
12385 sctp_copy_it_in(struct sctp_tcb *stcb,
12386 struct sctp_association *asoc,
12387 struct sctp_sndrcvinfo *srcv,
12389 struct sctp_nets *net,
12390 ssize_t max_send_len,
12391 int user_marks_eor,
12396 * This routine must be very careful in its work. Protocol
12397 * processing is up and running so care must be taken to spl...()
12398 * when you need to do something that may effect the stcb/asoc. The
12399 * sb is locked however. When data is copied the protocol processing
12400 * should be enabled since this is a slower operation...
12402 struct sctp_stream_queue_pending *sp = NULL;
12406 /* Now can we send this? */
12407 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12408 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12409 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12410 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12411 /* got data while shutting down */
12412 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12413 *error = ECONNRESET;
12416 sctp_alloc_a_strmoq(stcb, sp);
12418 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12423 sp->sender_all_done = 0;
12424 sp->sinfo_flags = srcv->sinfo_flags;
12425 sp->timetolive = srcv->sinfo_timetolive;
12426 sp->ppid = srcv->sinfo_ppid;
12427 sp->context = srcv->sinfo_context;
12429 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12431 sp->sid = srcv->sinfo_stream;
12432 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12433 if ((sp->length == (uint32_t)uio->uio_resid) &&
12434 ((user_marks_eor == 0) ||
12435 (srcv->sinfo_flags & SCTP_EOF) ||
12436 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12437 sp->msg_is_complete = 1;
12439 sp->msg_is_complete = 0;
12441 sp->sender_all_done = 0;
12442 sp->some_taken = 0;
12443 sp->put_last_out = 0;
12444 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12445 sp->data = sp->tail_mbuf = NULL;
12446 if (sp->length == 0) {
12449 if (srcv->sinfo_keynumber_valid) {
12450 sp->auth_keyid = srcv->sinfo_keynumber;
12452 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12454 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12455 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12456 sp->holds_key_ref = 1;
12458 *error = sctp_copy_one(sp, uio, resv_in_first);
12461 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12464 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12466 atomic_add_int(&sp->net->ref_count, 1);
12470 sctp_set_prsctp_policy(sp);
12478 sctp_sosend(struct socket *so,
12479 struct sockaddr *addr,
12482 struct mbuf *control,
12487 int error, use_sndinfo = 0;
12488 struct sctp_sndrcvinfo sndrcvninfo;
12489 struct sockaddr *addr_to_use;
12490 #if defined(INET) && defined(INET6)
12491 struct sockaddr_in sin;
12495 /* process cmsg snd/rcv info (maybe a assoc-id) */
12496 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12497 sizeof(sndrcvninfo))) {
12502 addr_to_use = addr;
12503 #if defined(INET) && defined(INET6)
12504 if ((addr) && (addr->sa_family == AF_INET6)) {
12505 struct sockaddr_in6 *sin6;
12507 sin6 = (struct sockaddr_in6 *)addr;
12508 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12509 in6_sin6_2_sin(&sin, sin6);
12510 addr_to_use = (struct sockaddr *)&sin;
12514 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12517 use_sndinfo ? &sndrcvninfo : NULL
12525 sctp_lower_sosend(struct socket *so,
12526 struct sockaddr *addr,
12528 struct mbuf *i_pak,
12529 struct mbuf *control,
12531 struct sctp_sndrcvinfo *srcv
12536 ssize_t sndlen = 0, max_len;
12538 struct mbuf *top = NULL;
12539 int queue_only = 0, queue_only_for_init = 0;
12540 int free_cnt_applied = 0;
12542 int now_filled = 0;
12543 unsigned int inqueue_bytes = 0;
12544 struct sctp_block_entry be;
12545 struct sctp_inpcb *inp;
12546 struct sctp_tcb *stcb = NULL;
12547 struct timeval now;
12548 struct sctp_nets *net;
12549 struct sctp_association *asoc;
12550 struct sctp_inpcb *t_inp;
12551 int user_marks_eor;
12552 int create_lock_applied = 0;
12553 int nagle_applies = 0;
12554 int some_on_control = 0;
12555 int got_all_of_the_send = 0;
12556 int hold_tcblock = 0;
12557 int non_blocking = 0;
12558 uint32_t local_add_more;
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 (sinfo_flags & SCTP_SENDALL) {
12656 /* its a sendall */
12657 error = sctp_sendall(inp, uio, top, srcv);
12661 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12662 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12666 /* now we must find the assoc */
12667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12668 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12669 SCTP_INP_RLOCK(inp);
12670 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12672 SCTP_TCB_LOCK(stcb);
12675 SCTP_INP_RUNLOCK(inp);
12676 } else if (sinfo_assoc_id) {
12677 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12678 if (stcb != NULL) {
12683 * Since we did not use findep we must
12684 * increment it, and if we don't find a tcb
12687 SCTP_INP_WLOCK(inp);
12688 SCTP_INP_INCR_REF(inp);
12689 SCTP_INP_WUNLOCK(inp);
12690 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12691 if (stcb == NULL) {
12692 SCTP_INP_WLOCK(inp);
12693 SCTP_INP_DECR_REF(inp);
12694 SCTP_INP_WUNLOCK(inp);
12699 if ((stcb == NULL) && (addr)) {
12700 /* Possible implicit send? */
12701 SCTP_ASOC_CREATE_LOCK(inp);
12702 create_lock_applied = 1;
12703 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12704 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12705 /* Should I really unlock ? */
12706 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12711 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12712 (addr->sa_family == AF_INET6)) {
12713 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12717 SCTP_INP_WLOCK(inp);
12718 SCTP_INP_INCR_REF(inp);
12719 SCTP_INP_WUNLOCK(inp);
12720 /* With the lock applied look again */
12721 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12722 #if defined(INET) || defined(INET6)
12723 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12724 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12727 if (stcb == NULL) {
12728 SCTP_INP_WLOCK(inp);
12729 SCTP_INP_DECR_REF(inp);
12730 SCTP_INP_WUNLOCK(inp);
12737 if (t_inp != inp) {
12738 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12743 if (stcb == NULL) {
12744 if (addr == NULL) {
12745 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12749 /* We must go ahead and start the INIT process */
12752 if ((sinfo_flags & SCTP_ABORT) ||
12753 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12755 * User asks to abort a non-existant assoc,
12756 * or EOF a non-existant assoc with no data
12758 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12762 /* get an asoc/stcb struct */
12763 vrf_id = inp->def_vrf_id;
12765 if (create_lock_applied == 0) {
12766 panic("Error, should hold create lock and I don't?");
12769 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12770 inp->sctp_ep.pre_open_stream_count,
12773 if (stcb == NULL) {
12774 /* Error is setup for us in the call */
12777 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12778 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12780 * Set the connected flag so we can queue
12783 soisconnecting(so);
12786 if (create_lock_applied) {
12787 SCTP_ASOC_CREATE_UNLOCK(inp);
12788 create_lock_applied = 0;
12790 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12793 * Turn on queue only flag to prevent data from
12797 asoc = &stcb->asoc;
12798 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12799 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12801 /* initialize authentication params for the assoc */
12802 sctp_initialize_auth_params(inp, stcb);
12805 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12806 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12807 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12813 /* out with the INIT */
12814 queue_only_for_init = 1;
12816 * we may want to dig in after this call and adjust the MTU
12817 * value. It defaulted to 1500 (constant) but the ro
12818 * structure may now have an update and thus we may need to
12819 * change it BEFORE we append the message.
12823 asoc = &stcb->asoc;
12825 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12826 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12828 net = sctp_findnet(stcb, addr);
12831 if ((net == NULL) ||
12832 ((port != 0) && (port != stcb->rport))) {
12833 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12838 if (stcb->asoc.alternate) {
12839 net = stcb->asoc.alternate;
12841 net = stcb->asoc.primary_destination;
12844 atomic_add_int(&stcb->total_sends, 1);
12845 /* Keep the stcb from being freed under our feet */
12846 atomic_add_int(&asoc->refcnt, 1);
12847 free_cnt_applied = 1;
12849 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12850 if (sndlen > asoc->smallest_mtu) {
12851 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12856 if (SCTP_SO_IS_NBIO(so)
12857 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12861 /* would we block? */
12862 if (non_blocking) {
12865 if (hold_tcblock == 0) {
12866 SCTP_TCB_LOCK(stcb);
12869 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12870 if (user_marks_eor == 0) {
12875 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12876 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12877 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12878 if (sndlen > SCTP_SB_LIMIT_SND(so))
12881 error = EWOULDBLOCK;
12884 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12885 SCTP_TCB_UNLOCK(stcb);
12888 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12890 local_soresv = sndlen;
12891 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12892 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12893 error = ECONNRESET;
12896 if (create_lock_applied) {
12897 SCTP_ASOC_CREATE_UNLOCK(inp);
12898 create_lock_applied = 0;
12900 /* Is the stream no. valid? */
12901 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12902 /* Invalid stream number */
12903 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12907 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12908 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12910 * Can't queue any data while stream reset is underway.
12912 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12917 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12920 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12921 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12924 /* we are now done with all control */
12926 sctp_m_freem(control);
12929 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12930 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12931 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12932 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12933 if (srcv->sinfo_flags & SCTP_ABORT) {
12936 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12937 error = ECONNRESET;
12941 /* Ok, we will attempt a msgsnd :> */
12943 p->td_ru.ru_msgsnd++;
12945 /* Are we aborting? */
12946 if (srcv->sinfo_flags & SCTP_ABORT) {
12948 ssize_t tot_demand, tot_out = 0, max_out;
12950 SCTP_STAT_INCR(sctps_sends_with_abort);
12951 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12952 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12953 /* It has to be up before we abort */
12954 /* how big is the user initiated abort? */
12955 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12959 if (hold_tcblock) {
12960 SCTP_TCB_UNLOCK(stcb);
12964 struct mbuf *cntm = NULL;
12966 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12968 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12969 tot_out += SCTP_BUF_LEN(cntm);
12973 /* Must fit in a MTU */
12975 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12976 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12978 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12982 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12985 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12989 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12990 max_out -= sizeof(struct sctp_abort_msg);
12991 if (tot_out > max_out) {
12995 struct sctp_paramhdr *ph;
12997 /* now move forward the data pointer */
12998 ph = mtod(mm, struct sctp_paramhdr *);
12999 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13000 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
13002 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
13004 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13007 * Here if we can't get his data we
13008 * still abort we just don't get to
13009 * send the users note :-0
13016 SCTP_BUF_NEXT(mm) = top;
13020 if (hold_tcblock == 0) {
13021 SCTP_TCB_LOCK(stcb);
13023 atomic_add_int(&stcb->asoc.refcnt, -1);
13024 free_cnt_applied = 0;
13025 /* release this lock, otherwise we hang on ourselves */
13026 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13027 /* now relock the stcb so everything is sane */
13031 * In this case top is already chained to mm avoid double
13032 * free, since we free it below if top != NULL and driver
13033 * would free it after sending the packet out
13040 /* Calculate the maximum we can send */
13041 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13042 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13043 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13047 if (hold_tcblock) {
13048 SCTP_TCB_UNLOCK(stcb);
13051 if (asoc->strmout == NULL) {
13052 /* huh? software error */
13053 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13058 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13059 if ((user_marks_eor == 0) &&
13060 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13061 /* It will NEVER fit */
13062 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13066 if ((uio == NULL) && user_marks_eor) {
13068 * We do not support eeor mode for
13069 * sending with mbuf chains (like sendfile).
13071 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13076 if (user_marks_eor) {
13077 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13080 * For non-eeor the whole message must fit in
13081 * the socket send buffer.
13083 local_add_more = (uint32_t)sndlen;
13086 if (non_blocking) {
13087 goto skip_preblock;
13089 if (((max_len <= local_add_more) &&
13090 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13092 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13093 /* No room right now ! */
13094 SOCKBUF_LOCK(&so->so_snd);
13095 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13096 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13097 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13098 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13099 (unsigned int)SCTP_SB_LIMIT_SND(so),
13102 stcb->asoc.stream_queue_cnt,
13103 stcb->asoc.chunks_on_out_queue,
13104 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13105 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13106 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13109 stcb->block_entry = &be;
13110 error = sbwait(&so->so_snd);
13111 stcb->block_entry = NULL;
13112 if (error || so->so_error || be.error) {
13115 error = so->so_error;
13120 SOCKBUF_UNLOCK(&so->so_snd);
13123 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13124 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13125 asoc, stcb->asoc.total_output_queue_size);
13127 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13128 SOCKBUF_UNLOCK(&so->so_snd);
13131 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13133 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13134 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13138 SOCKBUF_UNLOCK(&so->so_snd);
13142 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13146 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13147 * case NOTE: uio will be null when top/mbuf is passed
13150 if (srcv->sinfo_flags & SCTP_EOF) {
13151 got_all_of_the_send = 1;
13154 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13160 struct sctp_stream_queue_pending *sp;
13161 struct sctp_stream_out *strm;
13164 SCTP_TCB_SEND_LOCK(stcb);
13165 if ((asoc->stream_locked) &&
13166 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13167 SCTP_TCB_SEND_UNLOCK(stcb);
13168 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13172 SCTP_TCB_SEND_UNLOCK(stcb);
13174 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13175 if (strm->last_msg_incomplete == 0) {
13177 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13181 SCTP_TCB_SEND_LOCK(stcb);
13182 if (sp->msg_is_complete) {
13183 strm->last_msg_incomplete = 0;
13184 asoc->stream_locked = 0;
13187 * Just got locked to this guy in case of an
13190 strm->last_msg_incomplete = 1;
13191 if (stcb->asoc.idata_supported == 0) {
13192 asoc->stream_locked = 1;
13193 asoc->stream_locked_on = srcv->sinfo_stream;
13195 sp->sender_all_done = 0;
13197 sctp_snd_sb_alloc(stcb, sp->length);
13198 atomic_add_int(&asoc->stream_queue_cnt, 1);
13199 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13200 SCTP_STAT_INCR(sctps_sends_with_unord);
13202 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13203 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13204 SCTP_TCB_SEND_UNLOCK(stcb);
13206 SCTP_TCB_SEND_LOCK(stcb);
13207 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13208 SCTP_TCB_SEND_UNLOCK(stcb);
13210 /* ???? Huh ??? last msg is gone */
13212 panic("Warning: Last msg marked incomplete, yet nothing left?");
13214 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13215 strm->last_msg_incomplete = 0;
13221 while (uio->uio_resid > 0) {
13222 /* How much room do we have? */
13223 struct mbuf *new_tail, *mm;
13225 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13226 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13227 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13231 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13232 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13233 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13236 if (hold_tcblock) {
13237 SCTP_TCB_UNLOCK(stcb);
13240 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13241 if ((mm == NULL) || error) {
13247 /* Update the mbuf and count */
13248 SCTP_TCB_SEND_LOCK(stcb);
13249 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13251 * we need to get out. Peer probably
13255 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13256 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13257 error = ECONNRESET;
13259 SCTP_TCB_SEND_UNLOCK(stcb);
13262 if (sp->tail_mbuf) {
13263 /* tack it to the end */
13264 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13265 sp->tail_mbuf = new_tail;
13267 /* A stolen mbuf */
13269 sp->tail_mbuf = new_tail;
13271 sctp_snd_sb_alloc(stcb, sndout);
13272 atomic_add_int(&sp->length, sndout);
13274 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13275 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13278 /* Did we reach EOR? */
13279 if ((uio->uio_resid == 0) &&
13280 ((user_marks_eor == 0) ||
13281 (srcv->sinfo_flags & SCTP_EOF) ||
13282 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13283 sp->msg_is_complete = 1;
13285 sp->msg_is_complete = 0;
13287 SCTP_TCB_SEND_UNLOCK(stcb);
13289 if (uio->uio_resid == 0) {
13294 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13296 * This is ugly but we must assure locking
13299 if (hold_tcblock == 0) {
13300 SCTP_TCB_LOCK(stcb);
13303 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13304 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13305 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13306 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13312 SCTP_TCB_UNLOCK(stcb);
13315 /* wait for space now */
13316 if (non_blocking) {
13317 /* Non-blocking io in place out */
13320 /* What about the INIT, send it maybe */
13321 if (queue_only_for_init) {
13322 if (hold_tcblock == 0) {
13323 SCTP_TCB_LOCK(stcb);
13326 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13327 /* a collision took us forward? */
13330 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13331 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13335 if ((net->flight_size > net->cwnd) &&
13336 (asoc->sctp_cmt_on_off == 0)) {
13337 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13339 } else if (asoc->ifp_had_enobuf) {
13340 SCTP_STAT_INCR(sctps_ifnomemqueued);
13341 if (net->flight_size > (2 * net->mtu)) {
13344 asoc->ifp_had_enobuf = 0;
13346 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13347 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13348 (stcb->asoc.total_flight > 0) &&
13349 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13350 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13353 * Ok, Nagle is set on and we have data outstanding.
13354 * Don't send anything and let SACKs drive out the
13355 * data unless we have a "full" segment to send.
13357 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13358 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13360 SCTP_STAT_INCR(sctps_naglequeued);
13363 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13364 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13365 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13367 SCTP_STAT_INCR(sctps_naglesent);
13370 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13372 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13373 nagle_applies, un_sent);
13374 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13375 stcb->asoc.total_flight,
13376 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13378 if (queue_only_for_init)
13379 queue_only_for_init = 0;
13380 if ((queue_only == 0) && (nagle_applies == 0)) {
13382 * need to start chunk output
13383 * before blocking.. note that if
13384 * a lock is already applied, then
13385 * the input via the net is happening
13386 * and I don't need to start output :-D
13388 if (hold_tcblock == 0) {
13389 if (SCTP_TCB_TRYLOCK(stcb)) {
13391 sctp_chunk_output(inp,
13393 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13396 sctp_chunk_output(inp,
13398 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13400 if (hold_tcblock == 1) {
13401 SCTP_TCB_UNLOCK(stcb);
13405 SOCKBUF_LOCK(&so->so_snd);
13407 * This is a bit strange, but I think it will
13408 * work. The total_output_queue_size is locked and
13409 * protected by the TCB_LOCK, which we just released.
13410 * There is a race that can occur between releasing it
13411 * above, and me getting the socket lock, where sacks
13412 * come in but we have not put the SB_WAIT on the
13413 * so_snd buffer to get the wakeup. After the LOCK
13414 * is applied the sack_processing will also need to
13415 * LOCK the so->so_snd to do the actual sowwakeup(). So
13416 * once we have the socket buffer lock if we recheck the
13417 * size we KNOW we will get to sleep safely with the
13418 * wakeup flag in place.
13420 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13421 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13422 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13423 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13424 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13425 asoc, uio->uio_resid);
13428 stcb->block_entry = &be;
13429 error = sbwait(&so->so_snd);
13430 stcb->block_entry = NULL;
13432 if (error || so->so_error || be.error) {
13435 error = so->so_error;
13440 SOCKBUF_UNLOCK(&so->so_snd);
13444 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13445 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13446 asoc, stcb->asoc.total_output_queue_size);
13449 SOCKBUF_UNLOCK(&so->so_snd);
13450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13454 SCTP_TCB_SEND_LOCK(stcb);
13455 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13456 SCTP_TCB_SEND_UNLOCK(stcb);
13460 if (sp->msg_is_complete == 0) {
13461 strm->last_msg_incomplete = 1;
13462 if (stcb->asoc.idata_supported == 0) {
13463 asoc->stream_locked = 1;
13464 asoc->stream_locked_on = srcv->sinfo_stream;
13467 sp->sender_all_done = 1;
13468 strm->last_msg_incomplete = 0;
13469 asoc->stream_locked = 0;
13472 SCTP_PRINTF("Huh no sp TSNH?\n");
13473 strm->last_msg_incomplete = 0;
13474 asoc->stream_locked = 0;
13476 SCTP_TCB_SEND_UNLOCK(stcb);
13477 if (uio->uio_resid == 0) {
13478 got_all_of_the_send = 1;
13481 /* We send in a 0, since we do NOT have any locks */
13482 error = sctp_msg_append(stcb, net, top, srcv, 0);
13484 if (srcv->sinfo_flags & SCTP_EOF) {
13486 * This should only happen for Panda for the mbuf
13487 * send case, which does NOT yet support EEOR mode.
13488 * Thus, we can just set this flag to do the proper
13491 got_all_of_the_send = 1;
13499 if ((srcv->sinfo_flags & SCTP_EOF) &&
13500 (got_all_of_the_send == 1)) {
13501 SCTP_STAT_INCR(sctps_sends_with_eof);
13503 if (hold_tcblock == 0) {
13504 SCTP_TCB_LOCK(stcb);
13507 if (TAILQ_EMPTY(&asoc->send_queue) &&
13508 TAILQ_EMPTY(&asoc->sent_queue) &&
13509 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13510 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13513 /* there is nothing queued to send, so I'm done... */
13514 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13515 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13516 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13517 struct sctp_nets *netp;
13519 /* only send SHUTDOWN the first time through */
13520 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13521 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13523 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13524 sctp_stop_timers_for_shutdown(stcb);
13525 if (stcb->asoc.alternate) {
13526 netp = stcb->asoc.alternate;
13528 netp = stcb->asoc.primary_destination;
13530 sctp_send_shutdown(stcb, netp);
13531 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13533 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13534 asoc->primary_destination);
13538 * we still got (or just got) data to send, so set
13542 * XXX sockets draft says that SCTP_EOF should be
13543 * sent with no data. currently, we will allow user
13544 * data to be sent first and move to
13547 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13548 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13549 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13550 if (hold_tcblock == 0) {
13551 SCTP_TCB_LOCK(stcb);
13554 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13555 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13557 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13558 if (TAILQ_EMPTY(&asoc->send_queue) &&
13559 TAILQ_EMPTY(&asoc->sent_queue) &&
13560 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13561 struct mbuf *op_err;
13562 char msg[SCTP_DIAG_INFO_LEN];
13565 if (free_cnt_applied) {
13566 atomic_add_int(&stcb->asoc.refcnt, -1);
13567 free_cnt_applied = 0;
13569 snprintf(msg, sizeof(msg),
13570 "%s:%d at %s", __FILE__, __LINE__, __func__);
13571 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13573 sctp_abort_an_association(stcb->sctp_ep, stcb,
13574 op_err, SCTP_SO_LOCKED);
13576 * now relock the stcb so everything
13583 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13584 asoc->primary_destination);
13585 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13590 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13591 some_on_control = 1;
13593 if (queue_only_for_init) {
13594 if (hold_tcblock == 0) {
13595 SCTP_TCB_LOCK(stcb);
13598 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13599 /* a collision took us forward? */
13602 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13603 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13607 if ((net->flight_size > net->cwnd) &&
13608 (stcb->asoc.sctp_cmt_on_off == 0)) {
13609 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13611 } else if (asoc->ifp_had_enobuf) {
13612 SCTP_STAT_INCR(sctps_ifnomemqueued);
13613 if (net->flight_size > (2 * net->mtu)) {
13616 asoc->ifp_had_enobuf = 0;
13618 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13619 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13620 (stcb->asoc.total_flight > 0) &&
13621 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13622 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13624 * Ok, Nagle is set on and we have data outstanding.
13625 * Don't send anything and let SACKs drive out the
13626 * data unless wen have a "full" segment to send.
13628 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13629 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13631 SCTP_STAT_INCR(sctps_naglequeued);
13634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13635 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13636 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13638 SCTP_STAT_INCR(sctps_naglesent);
13641 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13642 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13643 nagle_applies, un_sent);
13644 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13645 stcb->asoc.total_flight,
13646 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13648 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13649 /* we can attempt to send too. */
13650 if (hold_tcblock == 0) {
13652 * If there is activity recv'ing sacks no need to
13655 if (SCTP_TCB_TRYLOCK(stcb)) {
13656 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13660 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13662 } else if ((queue_only == 0) &&
13663 (stcb->asoc.peers_rwnd == 0) &&
13664 (stcb->asoc.total_flight == 0)) {
13665 /* We get to have a probe outstanding */
13666 if (hold_tcblock == 0) {
13668 SCTP_TCB_LOCK(stcb);
13670 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13671 } else if (some_on_control) {
13672 int num_out, reason, frag_point;
13674 /* Here we do control only */
13675 if (hold_tcblock == 0) {
13677 SCTP_TCB_LOCK(stcb);
13679 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13680 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13681 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13683 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13684 queue_only, stcb->asoc.peers_rwnd, un_sent,
13685 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13686 stcb->asoc.total_output_queue_size, error);
13691 if (local_soresv && stcb) {
13692 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13694 if (create_lock_applied) {
13695 SCTP_ASOC_CREATE_UNLOCK(inp);
13697 if ((stcb) && hold_tcblock) {
13698 SCTP_TCB_UNLOCK(stcb);
13700 if (stcb && free_cnt_applied) {
13701 atomic_add_int(&stcb->asoc.refcnt, -1);
13705 if (mtx_owned(&stcb->tcb_mtx)) {
13706 panic("Leaving with tcb mtx owned?");
13708 if (mtx_owned(&stcb->tcb_send_mtx)) {
13709 panic("Leaving with tcb send mtx owned?");
13717 sctp_m_freem(control);
13724 * generate an AUTHentication chunk, if required
13727 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13728 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13729 struct sctp_tcb *stcb, uint8_t chunk)
13731 struct mbuf *m_auth;
13732 struct sctp_auth_chunk *auth;
13736 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13740 if (stcb->asoc.auth_supported == 0) {
13743 /* does the requested chunk require auth? */
13744 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13747 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13748 if (m_auth == NULL) {
13752 /* reserve some space if this will be the first mbuf */
13754 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13755 /* fill in the AUTH chunk details */
13756 auth = mtod(m_auth, struct sctp_auth_chunk *);
13757 memset(auth, 0, sizeof(*auth));
13758 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13759 auth->ch.chunk_flags = 0;
13760 chunk_len = sizeof(*auth) +
13761 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13762 auth->ch.chunk_length = htons(chunk_len);
13763 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13764 /* key id and hmac digest will be computed and filled in upon send */
13766 /* save the offset where the auth was inserted into the chain */
13768 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13769 *offset += SCTP_BUF_LEN(cn);
13772 /* update length and return pointer to the auth chunk */
13773 SCTP_BUF_LEN(m_auth) = chunk_len;
13774 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13775 if (auth_ret != NULL)
13783 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13785 struct nd_prefix *pfx = NULL;
13786 struct nd_pfxrouter *pfxrtr = NULL;
13787 struct sockaddr_in6 gw6;
13789 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13792 /* get prefix entry of address */
13794 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13795 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13797 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13798 &src6->sin6_addr, &pfx->ndpr_mask))
13801 /* no prefix entry in the prefix list */
13804 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13805 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13809 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13810 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13812 /* search installed gateway from prefix entry */
13813 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13814 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13815 gw6.sin6_family = AF_INET6;
13816 gw6.sin6_len = sizeof(struct sockaddr_in6);
13817 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13818 sizeof(struct in6_addr));
13819 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13820 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13821 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13822 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13823 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13825 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13830 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13836 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13839 struct sockaddr_in *sin, *mask;
13840 struct ifaddr *ifa;
13841 struct in_addr srcnetaddr, gwnetaddr;
13843 if (ro == NULL || ro->ro_rt == NULL ||
13844 sifa->address.sa.sa_family != AF_INET) {
13847 ifa = (struct ifaddr *)sifa->ifa;
13848 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13849 sin = &sifa->address.sin;
13850 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13851 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13852 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13853 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13855 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13856 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13857 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13858 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13859 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13860 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {