2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_pcb.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_uio.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_indata.h>
52 #include <netinet/sctp_bsd_addr.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_crc32.h>
55 #include <netinet/sctp_kdtrace.h>
56 #if defined(INET) || defined(INET6)
57 #include <netinet/udp.h>
59 #include <netinet/udp_var.h>
60 #include <machine/in_cksum.h>
62 #define SCTP_MAX_GAPS_INARRAY 4
64 uint8_t right_edge; /* mergable on the right edge */
65 uint8_t left_edge; /* mergable on the left edge */
68 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
71 const struct sack_track sack_array[256] = {
72 {0, 0, 0, 0, /* 0x00 */
79 {1, 0, 1, 0, /* 0x01 */
86 {0, 0, 1, 0, /* 0x02 */
93 {1, 0, 1, 0, /* 0x03 */
100 {0, 0, 1, 0, /* 0x04 */
107 {1, 0, 2, 0, /* 0x05 */
114 {0, 0, 1, 0, /* 0x06 */
121 {1, 0, 1, 0, /* 0x07 */
128 {0, 0, 1, 0, /* 0x08 */
135 {1, 0, 2, 0, /* 0x09 */
142 {0, 0, 2, 0, /* 0x0a */
149 {1, 0, 2, 0, /* 0x0b */
156 {0, 0, 1, 0, /* 0x0c */
163 {1, 0, 2, 0, /* 0x0d */
170 {0, 0, 1, 0, /* 0x0e */
177 {1, 0, 1, 0, /* 0x0f */
184 {0, 0, 1, 0, /* 0x10 */
191 {1, 0, 2, 0, /* 0x11 */
198 {0, 0, 2, 0, /* 0x12 */
205 {1, 0, 2, 0, /* 0x13 */
212 {0, 0, 2, 0, /* 0x14 */
219 {1, 0, 3, 0, /* 0x15 */
226 {0, 0, 2, 0, /* 0x16 */
233 {1, 0, 2, 0, /* 0x17 */
240 {0, 0, 1, 0, /* 0x18 */
247 {1, 0, 2, 0, /* 0x19 */
254 {0, 0, 2, 0, /* 0x1a */
261 {1, 0, 2, 0, /* 0x1b */
268 {0, 0, 1, 0, /* 0x1c */
275 {1, 0, 2, 0, /* 0x1d */
282 {0, 0, 1, 0, /* 0x1e */
289 {1, 0, 1, 0, /* 0x1f */
296 {0, 0, 1, 0, /* 0x20 */
303 {1, 0, 2, 0, /* 0x21 */
310 {0, 0, 2, 0, /* 0x22 */
317 {1, 0, 2, 0, /* 0x23 */
324 {0, 0, 2, 0, /* 0x24 */
331 {1, 0, 3, 0, /* 0x25 */
338 {0, 0, 2, 0, /* 0x26 */
345 {1, 0, 2, 0, /* 0x27 */
352 {0, 0, 2, 0, /* 0x28 */
359 {1, 0, 3, 0, /* 0x29 */
366 {0, 0, 3, 0, /* 0x2a */
373 {1, 0, 3, 0, /* 0x2b */
380 {0, 0, 2, 0, /* 0x2c */
387 {1, 0, 3, 0, /* 0x2d */
394 {0, 0, 2, 0, /* 0x2e */
401 {1, 0, 2, 0, /* 0x2f */
408 {0, 0, 1, 0, /* 0x30 */
415 {1, 0, 2, 0, /* 0x31 */
422 {0, 0, 2, 0, /* 0x32 */
429 {1, 0, 2, 0, /* 0x33 */
436 {0, 0, 2, 0, /* 0x34 */
443 {1, 0, 3, 0, /* 0x35 */
450 {0, 0, 2, 0, /* 0x36 */
457 {1, 0, 2, 0, /* 0x37 */
464 {0, 0, 1, 0, /* 0x38 */
471 {1, 0, 2, 0, /* 0x39 */
478 {0, 0, 2, 0, /* 0x3a */
485 {1, 0, 2, 0, /* 0x3b */
492 {0, 0, 1, 0, /* 0x3c */
499 {1, 0, 2, 0, /* 0x3d */
506 {0, 0, 1, 0, /* 0x3e */
513 {1, 0, 1, 0, /* 0x3f */
520 {0, 0, 1, 0, /* 0x40 */
527 {1, 0, 2, 0, /* 0x41 */
534 {0, 0, 2, 0, /* 0x42 */
541 {1, 0, 2, 0, /* 0x43 */
548 {0, 0, 2, 0, /* 0x44 */
555 {1, 0, 3, 0, /* 0x45 */
562 {0, 0, 2, 0, /* 0x46 */
569 {1, 0, 2, 0, /* 0x47 */
576 {0, 0, 2, 0, /* 0x48 */
583 {1, 0, 3, 0, /* 0x49 */
590 {0, 0, 3, 0, /* 0x4a */
597 {1, 0, 3, 0, /* 0x4b */
604 {0, 0, 2, 0, /* 0x4c */
611 {1, 0, 3, 0, /* 0x4d */
618 {0, 0, 2, 0, /* 0x4e */
625 {1, 0, 2, 0, /* 0x4f */
632 {0, 0, 2, 0, /* 0x50 */
639 {1, 0, 3, 0, /* 0x51 */
646 {0, 0, 3, 0, /* 0x52 */
653 {1, 0, 3, 0, /* 0x53 */
660 {0, 0, 3, 0, /* 0x54 */
667 {1, 0, 4, 0, /* 0x55 */
674 {0, 0, 3, 0, /* 0x56 */
681 {1, 0, 3, 0, /* 0x57 */
688 {0, 0, 2, 0, /* 0x58 */
695 {1, 0, 3, 0, /* 0x59 */
702 {0, 0, 3, 0, /* 0x5a */
709 {1, 0, 3, 0, /* 0x5b */
716 {0, 0, 2, 0, /* 0x5c */
723 {1, 0, 3, 0, /* 0x5d */
730 {0, 0, 2, 0, /* 0x5e */
737 {1, 0, 2, 0, /* 0x5f */
744 {0, 0, 1, 0, /* 0x60 */
751 {1, 0, 2, 0, /* 0x61 */
758 {0, 0, 2, 0, /* 0x62 */
765 {1, 0, 2, 0, /* 0x63 */
772 {0, 0, 2, 0, /* 0x64 */
779 {1, 0, 3, 0, /* 0x65 */
786 {0, 0, 2, 0, /* 0x66 */
793 {1, 0, 2, 0, /* 0x67 */
800 {0, 0, 2, 0, /* 0x68 */
807 {1, 0, 3, 0, /* 0x69 */
814 {0, 0, 3, 0, /* 0x6a */
821 {1, 0, 3, 0, /* 0x6b */
828 {0, 0, 2, 0, /* 0x6c */
835 {1, 0, 3, 0, /* 0x6d */
842 {0, 0, 2, 0, /* 0x6e */
849 {1, 0, 2, 0, /* 0x6f */
856 {0, 0, 1, 0, /* 0x70 */
863 {1, 0, 2, 0, /* 0x71 */
870 {0, 0, 2, 0, /* 0x72 */
877 {1, 0, 2, 0, /* 0x73 */
884 {0, 0, 2, 0, /* 0x74 */
891 {1, 0, 3, 0, /* 0x75 */
898 {0, 0, 2, 0, /* 0x76 */
905 {1, 0, 2, 0, /* 0x77 */
912 {0, 0, 1, 0, /* 0x78 */
919 {1, 0, 2, 0, /* 0x79 */
926 {0, 0, 2, 0, /* 0x7a */
933 {1, 0, 2, 0, /* 0x7b */
940 {0, 0, 1, 0, /* 0x7c */
947 {1, 0, 2, 0, /* 0x7d */
954 {0, 0, 1, 0, /* 0x7e */
961 {1, 0, 1, 0, /* 0x7f */
968 {0, 1, 1, 0, /* 0x80 */
975 {1, 1, 2, 0, /* 0x81 */
982 {0, 1, 2, 0, /* 0x82 */
989 {1, 1, 2, 0, /* 0x83 */
996 {0, 1, 2, 0, /* 0x84 */
1003 {1, 1, 3, 0, /* 0x85 */
1010 {0, 1, 2, 0, /* 0x86 */
1017 {1, 1, 2, 0, /* 0x87 */
1024 {0, 1, 2, 0, /* 0x88 */
1031 {1, 1, 3, 0, /* 0x89 */
1038 {0, 1, 3, 0, /* 0x8a */
1045 {1, 1, 3, 0, /* 0x8b */
1052 {0, 1, 2, 0, /* 0x8c */
1059 {1, 1, 3, 0, /* 0x8d */
1066 {0, 1, 2, 0, /* 0x8e */
1073 {1, 1, 2, 0, /* 0x8f */
1080 {0, 1, 2, 0, /* 0x90 */
1087 {1, 1, 3, 0, /* 0x91 */
1094 {0, 1, 3, 0, /* 0x92 */
1101 {1, 1, 3, 0, /* 0x93 */
1108 {0, 1, 3, 0, /* 0x94 */
1115 {1, 1, 4, 0, /* 0x95 */
1122 {0, 1, 3, 0, /* 0x96 */
1129 {1, 1, 3, 0, /* 0x97 */
1136 {0, 1, 2, 0, /* 0x98 */
1143 {1, 1, 3, 0, /* 0x99 */
1150 {0, 1, 3, 0, /* 0x9a */
1157 {1, 1, 3, 0, /* 0x9b */
1164 {0, 1, 2, 0, /* 0x9c */
1171 {1, 1, 3, 0, /* 0x9d */
1178 {0, 1, 2, 0, /* 0x9e */
1185 {1, 1, 2, 0, /* 0x9f */
1192 {0, 1, 2, 0, /* 0xa0 */
1199 {1, 1, 3, 0, /* 0xa1 */
1206 {0, 1, 3, 0, /* 0xa2 */
1213 {1, 1, 3, 0, /* 0xa3 */
1220 {0, 1, 3, 0, /* 0xa4 */
1227 {1, 1, 4, 0, /* 0xa5 */
1234 {0, 1, 3, 0, /* 0xa6 */
1241 {1, 1, 3, 0, /* 0xa7 */
1248 {0, 1, 3, 0, /* 0xa8 */
1255 {1, 1, 4, 0, /* 0xa9 */
1262 {0, 1, 4, 0, /* 0xaa */
1269 {1, 1, 4, 0, /* 0xab */
1276 {0, 1, 3, 0, /* 0xac */
1283 {1, 1, 4, 0, /* 0xad */
1290 {0, 1, 3, 0, /* 0xae */
1297 {1, 1, 3, 0, /* 0xaf */
1304 {0, 1, 2, 0, /* 0xb0 */
1311 {1, 1, 3, 0, /* 0xb1 */
1318 {0, 1, 3, 0, /* 0xb2 */
1325 {1, 1, 3, 0, /* 0xb3 */
1332 {0, 1, 3, 0, /* 0xb4 */
1339 {1, 1, 4, 0, /* 0xb5 */
1346 {0, 1, 3, 0, /* 0xb6 */
1353 {1, 1, 3, 0, /* 0xb7 */
1360 {0, 1, 2, 0, /* 0xb8 */
1367 {1, 1, 3, 0, /* 0xb9 */
1374 {0, 1, 3, 0, /* 0xba */
1381 {1, 1, 3, 0, /* 0xbb */
1388 {0, 1, 2, 0, /* 0xbc */
1395 {1, 1, 3, 0, /* 0xbd */
1402 {0, 1, 2, 0, /* 0xbe */
1409 {1, 1, 2, 0, /* 0xbf */
1416 {0, 1, 1, 0, /* 0xc0 */
1423 {1, 1, 2, 0, /* 0xc1 */
1430 {0, 1, 2, 0, /* 0xc2 */
1437 {1, 1, 2, 0, /* 0xc3 */
1444 {0, 1, 2, 0, /* 0xc4 */
1451 {1, 1, 3, 0, /* 0xc5 */
1458 {0, 1, 2, 0, /* 0xc6 */
1465 {1, 1, 2, 0, /* 0xc7 */
1472 {0, 1, 2, 0, /* 0xc8 */
1479 {1, 1, 3, 0, /* 0xc9 */
1486 {0, 1, 3, 0, /* 0xca */
1493 {1, 1, 3, 0, /* 0xcb */
1500 {0, 1, 2, 0, /* 0xcc */
1507 {1, 1, 3, 0, /* 0xcd */
1514 {0, 1, 2, 0, /* 0xce */
1521 {1, 1, 2, 0, /* 0xcf */
1528 {0, 1, 2, 0, /* 0xd0 */
1535 {1, 1, 3, 0, /* 0xd1 */
1542 {0, 1, 3, 0, /* 0xd2 */
1549 {1, 1, 3, 0, /* 0xd3 */
1556 {0, 1, 3, 0, /* 0xd4 */
1563 {1, 1, 4, 0, /* 0xd5 */
1570 {0, 1, 3, 0, /* 0xd6 */
1577 {1, 1, 3, 0, /* 0xd7 */
1584 {0, 1, 2, 0, /* 0xd8 */
1591 {1, 1, 3, 0, /* 0xd9 */
1598 {0, 1, 3, 0, /* 0xda */
1605 {1, 1, 3, 0, /* 0xdb */
1612 {0, 1, 2, 0, /* 0xdc */
1619 {1, 1, 3, 0, /* 0xdd */
1626 {0, 1, 2, 0, /* 0xde */
1633 {1, 1, 2, 0, /* 0xdf */
1640 {0, 1, 1, 0, /* 0xe0 */
1647 {1, 1, 2, 0, /* 0xe1 */
1654 {0, 1, 2, 0, /* 0xe2 */
1661 {1, 1, 2, 0, /* 0xe3 */
1668 {0, 1, 2, 0, /* 0xe4 */
1675 {1, 1, 3, 0, /* 0xe5 */
1682 {0, 1, 2, 0, /* 0xe6 */
1689 {1, 1, 2, 0, /* 0xe7 */
1696 {0, 1, 2, 0, /* 0xe8 */
1703 {1, 1, 3, 0, /* 0xe9 */
1710 {0, 1, 3, 0, /* 0xea */
1717 {1, 1, 3, 0, /* 0xeb */
1724 {0, 1, 2, 0, /* 0xec */
1731 {1, 1, 3, 0, /* 0xed */
1738 {0, 1, 2, 0, /* 0xee */
1745 {1, 1, 2, 0, /* 0xef */
1752 {0, 1, 1, 0, /* 0xf0 */
1759 {1, 1, 2, 0, /* 0xf1 */
1766 {0, 1, 2, 0, /* 0xf2 */
1773 {1, 1, 2, 0, /* 0xf3 */
1780 {0, 1, 2, 0, /* 0xf4 */
1787 {1, 1, 3, 0, /* 0xf5 */
1794 {0, 1, 2, 0, /* 0xf6 */
1801 {1, 1, 2, 0, /* 0xf7 */
1808 {0, 1, 1, 0, /* 0xf8 */
1815 {1, 1, 2, 0, /* 0xf9 */
1822 {0, 1, 2, 0, /* 0xfa */
1829 {1, 1, 2, 0, /* 0xfb */
1836 {0, 1, 1, 0, /* 0xfc */
1843 {1, 1, 2, 0, /* 0xfd */
1850 {0, 1, 1, 0, /* 0xfe */
1857 {1, 1, 1, 0, /* 0xff */
1867 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1868 struct sctp_scoping *scope,
1871 if ((scope->loopback_scope == 0) &&
1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1874 * skip loopback if not in scope *
1878 switch (ifa->address.sa.sa_family) {
1881 if (scope->ipv4_addr_legal) {
1882 struct sockaddr_in *sin;
1884 sin = &ifa->address.sin;
1885 if (sin->sin_addr.s_addr == 0) {
1886 /* not in scope , unspecified */
1889 if ((scope->ipv4_local_scope == 0) &&
1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1891 /* private address not in scope */
1901 if (scope->ipv6_addr_legal) {
1902 struct sockaddr_in6 *sin6;
1905 * Must update the flags, bummer, which means any
1906 * IFA locks must now be applied HERE <->
1909 sctp_gather_internal_ifa_flags(ifa);
1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1914 /* ok to use deprecated addresses? */
1915 sin6 = &ifa->address.sin6;
1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1917 /* skip unspecifed addresses */
1920 if ( /* (local_scope == 0) && */
1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1924 if ((scope->site_scope == 0) &&
1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1939 static struct mbuf *
1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
1942 #if defined(INET) || defined(INET6)
1943 struct sctp_paramhdr *paramh;
1948 switch (ifa->address.sa.sa_family) {
1951 plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
1956 plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
1962 #if defined(INET) || defined(INET6)
1963 if (M_TRAILINGSPACE(m) >= plen) {
1964 /* easy side we just drop it on the end */
1965 paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1968 /* Need more space */
1970 while (SCTP_BUF_NEXT(mret) != NULL) {
1971 mret = SCTP_BUF_NEXT(mret);
1973 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1974 if (SCTP_BUF_NEXT(mret) == NULL) {
1975 /* We are hosed, can't add more addresses */
1978 mret = SCTP_BUF_NEXT(mret);
1979 paramh = mtod(mret, struct sctp_paramhdr *);
1981 /* now add the parameter */
1982 switch (ifa->address.sa.sa_family) {
1986 struct sctp_ipv4addr_param *ipv4p;
1987 struct sockaddr_in *sin;
1989 sin = &ifa->address.sin;
1990 ipv4p = (struct sctp_ipv4addr_param *)paramh;
1991 paramh->param_type = htons(SCTP_IPV4_ADDRESS);
1992 paramh->param_length = htons(plen);
1993 ipv4p->addr = sin->sin_addr.s_addr;
1994 SCTP_BUF_LEN(mret) += plen;
2001 struct sctp_ipv6addr_param *ipv6p;
2002 struct sockaddr_in6 *sin6;
2004 sin6 = &ifa->address.sin6;
2005 ipv6p = (struct sctp_ipv6addr_param *)paramh;
2006 paramh->param_type = htons(SCTP_IPV6_ADDRESS);
2007 paramh->param_length = htons(plen);
2008 memcpy(ipv6p->addr, &sin6->sin6_addr,
2009 sizeof(ipv6p->addr));
2010 /* clear embedded scope in the address */
2011 in6_clearscope((struct in6_addr *)ipv6p->addr);
2012 SCTP_BUF_LEN(mret) += plen;
2027 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2028 struct sctp_scoping *scope,
2029 struct mbuf *m_at, int cnt_inits_to,
2030 uint16_t *padding_len, uint16_t *chunk_len)
2032 struct sctp_vrf *vrf = NULL;
2033 int cnt, limit_out = 0, total_count;
2036 vrf_id = inp->def_vrf_id;
2037 SCTP_IPI_ADDR_RLOCK();
2038 vrf = sctp_find_vrf(vrf_id);
2040 SCTP_IPI_ADDR_RUNLOCK();
2043 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2044 struct sctp_ifa *sctp_ifap;
2045 struct sctp_ifn *sctp_ifnp;
2048 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2050 cnt = SCTP_ADDRESS_LIMIT;
2053 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2054 if ((scope->loopback_scope == 0) &&
2055 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2057 * Skip loopback devices if loopback_scope
2062 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2064 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2065 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2066 &sctp_ifap->address.sin.sin_addr) != 0)) {
2071 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2072 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2073 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2077 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2080 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2084 if (cnt > SCTP_ADDRESS_LIMIT) {
2088 if (cnt > SCTP_ADDRESS_LIMIT) {
2095 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2097 if ((scope->loopback_scope == 0) &&
2098 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2100 * Skip loopback devices if
2101 * loopback_scope not set
2105 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2107 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2108 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2109 &sctp_ifap->address.sin.sin_addr) != 0)) {
2114 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2115 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2116 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2120 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2123 if (sctp_is_address_in_scope(sctp_ifap,
2127 if ((chunk_len != NULL) &&
2128 (padding_len != NULL) &&
2129 (*padding_len > 0)) {
2130 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2131 SCTP_BUF_LEN(m_at) += *padding_len;
2132 *chunk_len += *padding_len;
2135 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2146 if (total_count > SCTP_ADDRESS_LIMIT) {
2147 /* No more addresses */
2155 struct sctp_laddr *laddr;
2158 /* First, how many ? */
2159 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2160 if (laddr->ifa == NULL) {
2163 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2165 * Address being deleted by the system, dont
2169 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2171 * Address being deleted on this ep don't
2176 if (sctp_is_address_in_scope(laddr->ifa,
2183 * To get through a NAT we only list addresses if we have
2184 * more than one. That way if you just bind a single address
2185 * we let the source of the init dictate our address.
2189 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2190 if (laddr->ifa == NULL) {
2193 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2196 if (sctp_is_address_in_scope(laddr->ifa,
2200 if ((chunk_len != NULL) &&
2201 (padding_len != NULL) &&
2202 (*padding_len > 0)) {
2203 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2204 SCTP_BUF_LEN(m_at) += *padding_len;
2205 *chunk_len += *padding_len;
2208 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2210 if (cnt >= SCTP_ADDRESS_LIMIT) {
2216 SCTP_IPI_ADDR_RUNLOCK();
2220 static struct sctp_ifa *
2221 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2222 uint8_t dest_is_loop,
2223 uint8_t dest_is_priv,
2226 uint8_t dest_is_global = 0;
2228 /* dest_is_priv is true if destination is a private address */
2229 /* dest_is_loop is true if destination is a loopback addresses */
2232 * Here we determine if its a preferred address. A preferred address
2233 * means it is the same scope or higher scope then the destination.
2234 * L = loopback, P = private, G = global
2235 * -----------------------------------------
2236 * src | dest | result
2237 * ----------------------------------------
2239 * -----------------------------------------
2240 * P | L | yes-v4 no-v6
2241 * -----------------------------------------
2242 * G | L | yes-v4 no-v6
2243 * -----------------------------------------
2245 * -----------------------------------------
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2258 if (ifa->address.sa.sa_family != fam) {
2259 /* forget mis-matched family */
2262 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2265 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2266 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2267 /* Ok the address may be ok */
2269 if (fam == AF_INET6) {
2270 /* ok to use deprecated addresses? no lets not! */
2271 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2272 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2275 if (ifa->src_is_priv && !ifa->src_is_loop) {
2277 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2281 if (ifa->src_is_glob) {
2283 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2290 * Now that we know what is what, implement or table this could in
2291 * theory be done slicker (it used to be), but this is
2292 * straightforward and easier to validate :-)
2294 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2295 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2297 dest_is_loop, dest_is_priv, dest_is_global);
2299 if ((ifa->src_is_loop) && (dest_is_priv)) {
2300 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2303 if ((ifa->src_is_glob) && (dest_is_priv)) {
2304 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2307 if ((ifa->src_is_loop) && (dest_is_global)) {
2308 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2311 if ((ifa->src_is_priv) && (dest_is_global)) {
2312 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2315 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2316 /* its a preferred address */
2320 static struct sctp_ifa *
2321 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2322 uint8_t dest_is_loop,
2323 uint8_t dest_is_priv,
2326 uint8_t dest_is_global = 0;
2329 * Here we determine if its a acceptable address. A acceptable
2330 * address means it is the same scope or higher scope but we can
2331 * allow for NAT which means its ok to have a global dest and a
2334 * L = loopback, P = private, G = global
2335 * -----------------------------------------
2336 * src | dest | result
2337 * -----------------------------------------
2339 * -----------------------------------------
2340 * P | L | yes-v4 no-v6
2341 * -----------------------------------------
2343 * -----------------------------------------
2345 * -----------------------------------------
2347 * -----------------------------------------
2348 * G | P | yes - May not work
2349 * -----------------------------------------
2351 * -----------------------------------------
2352 * P | G | yes - May not work
2353 * -----------------------------------------
2355 * -----------------------------------------
2358 if (ifa->address.sa.sa_family != fam) {
2359 /* forget non matching family */
2360 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2361 ifa->address.sa.sa_family, fam);
2364 /* Ok the address may be ok */
2365 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2366 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2367 dest_is_loop, dest_is_priv);
2368 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2372 if (fam == AF_INET6) {
2373 /* ok to use deprecated addresses? */
2374 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2377 if (ifa->src_is_priv) {
2378 /* Special case, linklocal to loop */
2385 * Now that we know what is what, implement our table. This could in
2386 * theory be done slicker (it used to be), but this is
2387 * straightforward and easier to validate :-)
2389 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2392 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2395 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2398 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2401 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2402 /* its an acceptable address */
2407 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2409 struct sctp_laddr *laddr;
2412 /* There are no restrictions, no TCB :-) */
2415 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2416 if (laddr->ifa == NULL) {
2417 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2421 if (laddr->ifa == ifa) {
2422 /* Yes it is on the list */
2430 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2432 struct sctp_laddr *laddr;
2436 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2437 if (laddr->ifa == NULL) {
2438 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2442 if ((laddr->ifa == ifa) && laddr->action == 0)
2449 static struct sctp_ifa *
2450 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2453 int non_asoc_addr_ok,
2454 uint8_t dest_is_priv,
2455 uint8_t dest_is_loop,
2458 struct sctp_laddr *laddr, *starting_point;
2461 struct sctp_ifn *sctp_ifn;
2462 struct sctp_ifa *sctp_ifa, *sifa;
2463 struct sctp_vrf *vrf;
2466 vrf = sctp_find_vrf(vrf_id);
2470 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2471 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2472 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2474 * first question, is the ifn we will emit on in our list, if so, we
2475 * want such an address. Note that we first looked for a preferred
2479 /* is a preferred one on the interface we route out? */
2480 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2482 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2483 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2484 &sctp_ifa->address.sin.sin_addr) != 0)) {
2489 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2490 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2491 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2495 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2496 (non_asoc_addr_ok == 0))
2498 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2503 if (sctp_is_addr_in_ep(inp, sifa)) {
2504 atomic_add_int(&sifa->refcount, 1);
2510 * ok, now we now need to find one on the list of the addresses. We
2511 * can't get one on the emitting interface so let's find first a
2512 * preferred one. If not that an acceptable one otherwise... we
2515 starting_point = inp->next_addr_touse;
2517 if (inp->next_addr_touse == NULL) {
2518 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2521 for (laddr = inp->next_addr_touse; laddr;
2522 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2523 if (laddr->ifa == NULL) {
2524 /* address has been removed */
2527 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2528 /* address is being deleted */
2531 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2535 atomic_add_int(&sifa->refcount, 1);
2538 if (resettotop == 0) {
2539 inp->next_addr_touse = NULL;
2543 inp->next_addr_touse = starting_point;
2546 if (inp->next_addr_touse == NULL) {
2547 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2551 /* ok, what about an acceptable address in the inp */
2552 for (laddr = inp->next_addr_touse; laddr;
2553 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2554 if (laddr->ifa == NULL) {
2555 /* address has been removed */
2558 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2559 /* address is being deleted */
2562 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2566 atomic_add_int(&sifa->refcount, 1);
2569 if (resettotop == 0) {
2570 inp->next_addr_touse = NULL;
2571 goto once_again_too;
2575 * no address bound can be a source for the destination we are in
2581 static struct sctp_ifa *
2582 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2583 struct sctp_tcb *stcb,
2586 uint8_t dest_is_priv,
2587 uint8_t dest_is_loop,
2588 int non_asoc_addr_ok,
2591 struct sctp_laddr *laddr, *starting_point;
2593 struct sctp_ifn *sctp_ifn;
2594 struct sctp_ifa *sctp_ifa, *sifa;
2595 uint8_t start_at_beginning = 0;
2596 struct sctp_vrf *vrf;
2600 * first question, is the ifn we will emit on in our list, if so, we
2603 vrf = sctp_find_vrf(vrf_id);
2607 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2608 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2609 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2612 * first question, is the ifn we will emit on in our list? If so,
2613 * we want that one. First we look for a preferred. Second, we go
2614 * for an acceptable.
2617 /* first try for a preferred address on the ep */
2618 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2620 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2621 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2622 &sctp_ifa->address.sin.sin_addr) != 0)) {
2627 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2628 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2629 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2633 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2635 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2636 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2639 if (((non_asoc_addr_ok == 0) &&
2640 (sctp_is_addr_restricted(stcb, sifa))) ||
2641 (non_asoc_addr_ok &&
2642 (sctp_is_addr_restricted(stcb, sifa)) &&
2643 (!sctp_is_addr_pending(stcb, sifa)))) {
2644 /* on the no-no list */
2647 atomic_add_int(&sifa->refcount, 1);
2651 /* next try for an acceptable address on the ep */
2652 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2654 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2655 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2656 &sctp_ifa->address.sin.sin_addr) != 0)) {
2661 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2662 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2663 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2667 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2669 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2670 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2673 if (((non_asoc_addr_ok == 0) &&
2674 (sctp_is_addr_restricted(stcb, sifa))) ||
2675 (non_asoc_addr_ok &&
2676 (sctp_is_addr_restricted(stcb, sifa)) &&
2677 (!sctp_is_addr_pending(stcb, sifa)))) {
2678 /* on the no-no list */
2681 atomic_add_int(&sifa->refcount, 1);
2687 * if we can't find one like that then we must look at all addresses
2688 * bound to pick one at first preferable then secondly acceptable.
2690 starting_point = stcb->asoc.last_used_address;
2692 if (stcb->asoc.last_used_address == NULL) {
2693 start_at_beginning = 1;
2694 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2696 /* search beginning with the last used address */
2697 for (laddr = stcb->asoc.last_used_address; laddr;
2698 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2699 if (laddr->ifa == NULL) {
2700 /* address has been removed */
2703 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2704 /* address is being deleted */
2707 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2710 if (((non_asoc_addr_ok == 0) &&
2711 (sctp_is_addr_restricted(stcb, sifa))) ||
2712 (non_asoc_addr_ok &&
2713 (sctp_is_addr_restricted(stcb, sifa)) &&
2714 (!sctp_is_addr_pending(stcb, sifa)))) {
2715 /* on the no-no list */
2718 stcb->asoc.last_used_address = laddr;
2719 atomic_add_int(&sifa->refcount, 1);
2722 if (start_at_beginning == 0) {
2723 stcb->asoc.last_used_address = NULL;
2724 goto sctp_from_the_top;
2726 /* now try for any higher scope than the destination */
2727 stcb->asoc.last_used_address = starting_point;
2728 start_at_beginning = 0;
2730 if (stcb->asoc.last_used_address == NULL) {
2731 start_at_beginning = 1;
2732 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2734 /* search beginning with the last used address */
2735 for (laddr = stcb->asoc.last_used_address; laddr;
2736 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2737 if (laddr->ifa == NULL) {
2738 /* address has been removed */
2741 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2742 /* address is being deleted */
2745 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2749 if (((non_asoc_addr_ok == 0) &&
2750 (sctp_is_addr_restricted(stcb, sifa))) ||
2751 (non_asoc_addr_ok &&
2752 (sctp_is_addr_restricted(stcb, sifa)) &&
2753 (!sctp_is_addr_pending(stcb, sifa)))) {
2754 /* on the no-no list */
2757 stcb->asoc.last_used_address = laddr;
2758 atomic_add_int(&sifa->refcount, 1);
2761 if (start_at_beginning == 0) {
2762 stcb->asoc.last_used_address = NULL;
2763 goto sctp_from_the_top2;
2768 static struct sctp_ifa *
2769 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2770 struct sctp_inpcb *inp,
2771 struct sctp_tcb *stcb,
2772 int non_asoc_addr_ok,
2773 uint8_t dest_is_loop,
2774 uint8_t dest_is_priv,
2779 struct sctp_ifa *ifa, *sifa;
2780 int num_eligible_addr = 0;
2782 struct sockaddr_in6 sin6, lsa6;
2784 if (fam == AF_INET6) {
2785 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2786 (void)sa6_recoverscope(&sin6);
2789 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2791 if ((ifa->address.sa.sa_family == AF_INET) &&
2792 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2793 &ifa->address.sin.sin_addr) != 0)) {
2798 if ((ifa->address.sa.sa_family == AF_INET6) &&
2799 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin6.sin6_addr) != 0)) {
2804 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2805 (non_asoc_addr_ok == 0))
2807 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2812 if (fam == AF_INET6 &&
2814 sifa->src_is_loop && sifa->src_is_priv) {
2816 * don't allow fe80::1 to be a src on loop ::1, we
2817 * don't list it to the peer so we will get an
2822 if (fam == AF_INET6 &&
2823 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2824 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2826 * link-local <-> link-local must belong to the same
2829 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2830 (void)sa6_recoverscope(&lsa6);
2831 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2838 * Check if the IPv6 address matches to next-hop. In the
2839 * mobile case, old IPv6 address may be not deleted from the
2840 * interface. Then, the interface has previous and new
2841 * addresses. We should use one corresponding to the
2842 * next-hop. (by micchie)
2845 if (stcb && fam == AF_INET6 &&
2846 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2847 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2854 /* Avoid topologically incorrect IPv4 address */
2855 if (stcb && fam == AF_INET &&
2856 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2857 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2863 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2866 if (((non_asoc_addr_ok == 0) &&
2867 (sctp_is_addr_restricted(stcb, sifa))) ||
2868 (non_asoc_addr_ok &&
2869 (sctp_is_addr_restricted(stcb, sifa)) &&
2870 (!sctp_is_addr_pending(stcb, sifa)))) {
2872 * It is restricted for some reason..
2873 * probably not yet added.
2878 if (num_eligible_addr >= addr_wanted) {
2881 num_eligible_addr++;
2887 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2888 struct sctp_inpcb *inp,
2889 struct sctp_tcb *stcb,
2890 int non_asoc_addr_ok,
2891 uint8_t dest_is_loop,
2892 uint8_t dest_is_priv,
2895 struct sctp_ifa *ifa, *sifa;
2896 int num_eligible_addr = 0;
2898 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2900 if ((ifa->address.sa.sa_family == AF_INET) &&
2901 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2902 &ifa->address.sin.sin_addr) != 0)) {
2907 if ((ifa->address.sa.sa_family == AF_INET6) &&
2909 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin6.sin6_addr) != 0)) {
2914 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2915 (non_asoc_addr_ok == 0)) {
2918 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2924 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2927 if (((non_asoc_addr_ok == 0) &&
2928 (sctp_is_addr_restricted(stcb, sifa))) ||
2929 (non_asoc_addr_ok &&
2930 (sctp_is_addr_restricted(stcb, sifa)) &&
2931 (!sctp_is_addr_pending(stcb, sifa)))) {
2933 * It is restricted for some reason..
2934 * probably not yet added.
2939 num_eligible_addr++;
2941 return (num_eligible_addr);
2944 static struct sctp_ifa *
2945 sctp_choose_boundall(struct sctp_inpcb *inp,
2946 struct sctp_tcb *stcb,
2947 struct sctp_nets *net,
2950 uint8_t dest_is_priv,
2951 uint8_t dest_is_loop,
2952 int non_asoc_addr_ok,
2955 int cur_addr_num = 0, num_preferred = 0;
2957 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2958 struct sctp_ifa *sctp_ifa, *sifa;
2960 struct sctp_vrf *vrf;
2966 * For boundall we can use any address in the association.
2967 * If non_asoc_addr_ok is set we can use any address (at least in
2968 * theory). So we look for preferred addresses first. If we find one,
2969 * we use it. Otherwise we next try to get an address on the
2970 * interface, which we should be able to do (unless non_asoc_addr_ok
2971 * is false and we are routed out that way). In these cases where we
2972 * can't use the address of the interface we go through all the
2973 * ifn's looking for an address we can use and fill that in. Punting
2974 * means we send back address 0, which will probably cause problems
2975 * actually since then IP will fill in the address of the route ifn,
2976 * which means we probably already rejected it.. i.e. here comes an
2979 vrf = sctp_find_vrf(vrf_id);
2983 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2984 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2985 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2986 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2987 if (sctp_ifn == NULL) {
2988 /* ?? We don't have this guy ?? */
2989 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2990 goto bound_all_plan_b;
2992 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2993 ifn_index, sctp_ifn->ifn_name);
2996 cur_addr_num = net->indx_of_eligible_next_to_use;
2998 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3003 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3004 num_preferred, sctp_ifn->ifn_name);
3005 if (num_preferred == 0) {
3007 * no eligible addresses, we must use some other interface
3008 * address if we can find one.
3010 goto bound_all_plan_b;
3013 * Ok we have num_eligible_addr set with how many we can use, this
3014 * may vary from call to call due to addresses being deprecated
3017 if (cur_addr_num >= num_preferred) {
3021 * select the nth address from the list (where cur_addr_num is the
3022 * nth) and 0 is the first one, 1 is the second one etc...
3024 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3026 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3027 dest_is_priv, cur_addr_num, fam, ro);
3029 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3031 atomic_add_int(&sctp_ifa->refcount, 1);
3033 /* save off where the next one we will want */
3034 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3039 * plan_b: Look at all interfaces and find a preferred address. If
3040 * no preferred fall through to plan_c.
3043 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3044 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3045 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3046 sctp_ifn->ifn_name);
3047 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3048 /* wrong base scope */
3049 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3052 if ((sctp_ifn == looked_at) && looked_at) {
3053 /* already looked at this guy */
3054 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3057 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3058 dest_is_loop, dest_is_priv, fam);
3059 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3060 "Found ifn:%p %d preferred source addresses\n",
3061 ifn, num_preferred);
3062 if (num_preferred == 0) {
3063 /* None on this interface. */
3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3067 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3068 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3069 num_preferred, (void *)sctp_ifn, cur_addr_num);
3072 * Ok we have num_eligible_addr set with how many we can
3073 * use, this may vary from call to call due to addresses
3074 * being deprecated etc..
3076 if (cur_addr_num >= num_preferred) {
3079 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3080 dest_is_priv, cur_addr_num, fam, ro);
3084 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3085 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3087 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3088 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3089 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3090 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3092 atomic_add_int(&sifa->refcount, 1);
3096 again_with_private_addresses_allowed:
3098 /* plan_c: do we have an acceptable address on the emit interface */
3100 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3101 if (emit_ifn == NULL) {
3102 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3105 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3106 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3108 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3109 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3110 &sctp_ifa->address.sin.sin_addr) != 0)) {
3111 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3116 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3117 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3118 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3119 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3123 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3124 (non_asoc_addr_ok == 0)) {
3125 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3128 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3131 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3135 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3136 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3140 if (((non_asoc_addr_ok == 0) &&
3141 (sctp_is_addr_restricted(stcb, sifa))) ||
3142 (non_asoc_addr_ok &&
3143 (sctp_is_addr_restricted(stcb, sifa)) &&
3144 (!sctp_is_addr_pending(stcb, sifa)))) {
3146 * It is restricted for some reason..
3147 * probably not yet added.
3149 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3154 atomic_add_int(&sifa->refcount, 1);
3159 * plan_d: We are in trouble. No preferred address on the emit
3160 * interface. And not even a preferred address on all interfaces. Go
3161 * out and see if we can find an acceptable address somewhere
3162 * amongst all interfaces.
3164 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3165 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3166 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3167 /* wrong base scope */
3170 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3172 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3173 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3174 &sctp_ifa->address.sin.sin_addr) != 0)) {
3179 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3180 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3181 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3185 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3186 (non_asoc_addr_ok == 0))
3188 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3194 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3198 if (((non_asoc_addr_ok == 0) &&
3199 (sctp_is_addr_restricted(stcb, sifa))) ||
3200 (non_asoc_addr_ok &&
3201 (sctp_is_addr_restricted(stcb, sifa)) &&
3202 (!sctp_is_addr_pending(stcb, sifa)))) {
3204 * It is restricted for some
3205 * reason.. probably not yet added.
3216 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3217 stcb->asoc.scope.ipv4_local_scope = 1;
3219 goto again_with_private_addresses_allowed;
3220 } else if (retried == 1) {
3221 stcb->asoc.scope.ipv4_local_scope = 0;
3229 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3230 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3231 /* wrong base scope */
3234 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3235 struct sctp_ifa *tmp_sifa;
3238 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3239 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3240 &sctp_ifa->address.sin.sin_addr) != 0)) {
3245 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3246 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3247 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3251 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3252 (non_asoc_addr_ok == 0))
3254 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3257 if (tmp_sifa == NULL) {
3260 if (tmp_sifa == sifa) {
3264 if (sctp_is_address_in_scope(tmp_sifa,
3265 &stcb->asoc.scope, 0) == 0) {
3268 if (((non_asoc_addr_ok == 0) &&
3269 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3270 (non_asoc_addr_ok &&
3271 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3272 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3282 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3283 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3284 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3289 atomic_add_int(&sifa->refcount, 1);
3295 /* tcb may be NULL */
3297 sctp_source_address_selection(struct sctp_inpcb *inp,
3298 struct sctp_tcb *stcb,
3300 struct sctp_nets *net,
3301 int non_asoc_addr_ok, uint32_t vrf_id)
3303 struct sctp_ifa *answer;
3304 uint8_t dest_is_priv, dest_is_loop;
3307 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3310 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3315 * - Find the route if needed, cache if I can.
3316 * - Look at interface address in route, Is it in the bound list. If so we
3317 * have the best source.
3318 * - If not we must rotate amongst the addresses.
3322 * Do we need to pay attention to scope. We can have a private address
3323 * or a global address we are sourcing or sending to. So if we draw
3325 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3327 * ------------------------------------------
3328 * source * dest * result
3329 * -----------------------------------------
3330 * <a> Private * Global * NAT
3331 * -----------------------------------------
3332 * <b> Private * Private * No problem
3333 * -----------------------------------------
3334 * <c> Global * Private * Huh, How will this work?
3335 * -----------------------------------------
3336 * <d> Global * Global * No Problem
3337 *------------------------------------------
3338 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3340 *------------------------------------------
3341 * source * dest * result
3342 * -----------------------------------------
3343 * <a> Linklocal * Global *
3344 * -----------------------------------------
3345 * <b> Linklocal * Linklocal * No problem
3346 * -----------------------------------------
3347 * <c> Global * Linklocal * Huh, How will this work?
3348 * -----------------------------------------
3349 * <d> Global * Global * No Problem
3350 *------------------------------------------
3351 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3353 * And then we add to that what happens if there are multiple addresses
3354 * assigned to an interface. Remember the ifa on a ifn is a linked
3355 * list of addresses. So one interface can have more than one IP
3356 * address. What happens if we have both a private and a global
3357 * address? Do we then use context of destination to sort out which
3358 * one is best? And what about NAT's sending P->G may get you a NAT
3359 * translation, or should you select the G thats on the interface in
3364 * - count the number of addresses on the interface.
3365 * - if it is one, no problem except case <c>.
3366 * For <a> we will assume a NAT out there.
3367 * - if there are more than one, then we need to worry about scope P
3368 * or G. We should prefer G -> G and P -> P if possible.
3369 * Then as a secondary fall back to mixed types G->P being a last
3371 * - The above all works for bound all, but bound specific we need to
3372 * use the same concept but instead only consider the bound
3373 * addresses. If the bound set is NOT assigned to the interface then
3374 * we must use rotation amongst the bound addresses..
3376 if (ro->ro_nh == NULL) {
3378 * Need a route to cache.
3380 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3382 if (ro->ro_nh == NULL) {
3385 fam = ro->ro_dst.sa_family;
3386 dest_is_priv = dest_is_loop = 0;
3387 /* Setup our scopes for the destination */
3391 /* Scope based on outbound address */
3392 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3395 /* mark it as local */
3396 net->addr_is_local = 1;
3398 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3405 /* Scope based on outbound address */
3406 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3407 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3409 * If the address is a loopback address, which
3410 * consists of "::1" OR "fe80::1%lo0", we are
3411 * loopback scope. But we don't use dest_is_priv
3412 * (link local addresses).
3416 /* mark it as local */
3417 net->addr_is_local = 1;
3419 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3425 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3426 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3427 SCTP_IPI_ADDR_RLOCK();
3428 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3432 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3433 dest_is_priv, dest_is_loop,
3434 non_asoc_addr_ok, fam);
3435 SCTP_IPI_ADDR_RUNLOCK();
3442 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3443 vrf_id, dest_is_priv,
3445 non_asoc_addr_ok, fam);
3447 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3452 SCTP_IPI_ADDR_RUNLOCK();
3457 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3460 struct sctp_sndinfo sndinfo;
3461 struct sctp_prinfo prinfo;
3462 struct sctp_authinfo authinfo;
3463 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3467 * Independent of how many mbufs, find the c_type inside the control
3468 * structure and copy out the data.
3471 tot_len = SCTP_BUF_LEN(control);
3472 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3473 rem_len = tot_len - off;
3474 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3475 /* There is not enough room for one more. */
3478 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3479 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3480 /* We dont't have a complete CMSG header. */
3483 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3484 /* We don't have the complete CMSG. */
3487 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3488 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3489 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3490 ((c_type == cmh.cmsg_type) ||
3491 ((c_type == SCTP_SNDRCV) &&
3492 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3493 (cmh.cmsg_type == SCTP_PRINFO) ||
3494 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3495 if (c_type == cmh.cmsg_type) {
3496 if (cpsize > INT_MAX) {
3499 if (cmsg_data_len < (int)cpsize) {
3502 /* It is exactly what we want. Copy it out. */
3503 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3506 struct sctp_sndrcvinfo *sndrcvinfo;
3508 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3510 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3513 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3515 switch (cmh.cmsg_type) {
3517 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3520 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3521 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3522 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3523 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3524 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3525 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3528 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3531 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3532 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3533 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3535 sndrcvinfo->sinfo_timetolive = 0;
3537 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3540 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3543 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3544 sndrcvinfo->sinfo_keynumber_valid = 1;
3545 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3558 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3561 struct sctp_initmsg initmsg;
3563 struct sockaddr_in sin;
3566 struct sockaddr_in6 sin6;
3568 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3570 tot_len = SCTP_BUF_LEN(control);
3571 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3572 rem_len = tot_len - off;
3573 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3574 /* There is not enough room for one more. */
3578 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3579 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3580 /* We dont't have a complete CMSG header. */
3584 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3585 /* We don't have the complete CMSG. */
3589 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3590 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3591 if (cmh.cmsg_level == IPPROTO_SCTP) {
3592 switch (cmh.cmsg_type) {
3594 if (cmsg_data_len < (int)sizeof(struct sctp_initmsg)) {
3598 m_copydata(control, cmsg_data_off, sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3599 if (initmsg.sinit_max_attempts)
3600 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3601 if (initmsg.sinit_num_ostreams)
3602 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3603 if (initmsg.sinit_max_instreams)
3604 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3605 if (initmsg.sinit_max_init_timeo)
3606 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3607 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3608 struct sctp_stream_out *tmp_str;
3610 #if defined(SCTP_DETAILED_STR_STATS)
3614 /* Default is NOT correct */
3615 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3616 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3617 SCTP_TCB_UNLOCK(stcb);
3618 SCTP_MALLOC(tmp_str,
3619 struct sctp_stream_out *,
3620 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3622 SCTP_TCB_LOCK(stcb);
3623 if (tmp_str != NULL) {
3624 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3625 stcb->asoc.strmout = tmp_str;
3626 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3628 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3630 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3631 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3632 stcb->asoc.strmout[i].chunks_on_queues = 0;
3633 stcb->asoc.strmout[i].next_mid_ordered = 0;
3634 stcb->asoc.strmout[i].next_mid_unordered = 0;
3635 #if defined(SCTP_DETAILED_STR_STATS)
3636 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3637 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3638 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3641 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3642 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3644 stcb->asoc.strmout[i].sid = i;
3645 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3646 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3647 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3652 case SCTP_DSTADDRV4:
3653 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3657 memset(&sin, 0, sizeof(struct sockaddr_in));
3658 sin.sin_family = AF_INET;
3659 sin.sin_len = sizeof(struct sockaddr_in);
3660 sin.sin_port = stcb->rport;
3661 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3662 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3663 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3664 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3668 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3669 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3676 case SCTP_DSTADDRV6:
3677 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3681 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3682 sin6.sin6_family = AF_INET6;
3683 sin6.sin6_len = sizeof(struct sockaddr_in6);
3684 sin6.sin6_port = stcb->rport;
3685 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3686 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3687 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3692 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3693 in6_sin6_2_sin(&sin, &sin6);
3694 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3695 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3696 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3700 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3701 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3707 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3708 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3722 #if defined(INET) || defined(INET6)
3723 static struct sctp_tcb *
3724 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3726 struct mbuf *control,
3727 struct sctp_nets **net_p,
3731 struct sctp_tcb *stcb;
3732 struct sockaddr *addr;
3734 struct sockaddr_in sin;
3737 struct sockaddr_in6 sin6;
3739 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3741 tot_len = SCTP_BUF_LEN(control);
3742 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3743 rem_len = tot_len - off;
3744 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3745 /* There is not enough room for one more. */
3749 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3750 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3751 /* We dont't have a complete CMSG header. */
3755 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3756 /* We don't have the complete CMSG. */
3760 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3761 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3762 if (cmh.cmsg_level == IPPROTO_SCTP) {
3763 switch (cmh.cmsg_type) {
3765 case SCTP_DSTADDRV4:
3766 if (cmsg_data_len < (int)sizeof(struct in_addr)) {
3770 memset(&sin, 0, sizeof(struct sockaddr_in));
3771 sin.sin_family = AF_INET;
3772 sin.sin_len = sizeof(struct sockaddr_in);
3773 sin.sin_port = port;
3774 m_copydata(control, cmsg_data_off, sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3775 addr = (struct sockaddr *)&sin;
3779 case SCTP_DSTADDRV6:
3780 if (cmsg_data_len < (int)sizeof(struct in6_addr)) {
3784 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3785 sin6.sin6_family = AF_INET6;
3786 sin6.sin6_len = sizeof(struct sockaddr_in6);
3787 sin6.sin6_port = port;
3788 m_copydata(control, cmsg_data_off, sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3790 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3791 in6_sin6_2_sin(&sin, &sin6);
3792 addr = (struct sockaddr *)&sin;
3795 addr = (struct sockaddr *)&sin6;
3803 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3814 static struct mbuf *
3815 sctp_add_cookie(struct mbuf *init, int init_offset,
3816 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3818 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3819 struct sctp_state_cookie *stc;
3820 struct sctp_paramhdr *ph;
3823 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3824 sizeof(struct sctp_paramhdr)), 0,
3825 M_NOWAIT, 1, MT_DATA);
3829 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3830 if (copy_init == NULL) {
3834 #ifdef SCTP_MBUF_LOGGING
3835 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3836 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3839 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3841 if (copy_initack == NULL) {
3843 sctp_m_freem(copy_init);
3846 #ifdef SCTP_MBUF_LOGGING
3847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3848 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3851 /* easy side we just drop it on the end */
3852 ph = mtod(mret, struct sctp_paramhdr *);
3853 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3854 sizeof(struct sctp_paramhdr);
3855 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3856 sizeof(struct sctp_paramhdr));
3857 ph->param_type = htons(SCTP_STATE_COOKIE);
3858 ph->param_length = 0; /* fill in at the end */
3859 /* Fill in the stc cookie data */
3860 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3862 /* tack the INIT and then the INIT-ACK onto the chain */
3864 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3865 cookie_sz += SCTP_BUF_LEN(m_at);
3866 if (SCTP_BUF_NEXT(m_at) == NULL) {
3867 SCTP_BUF_NEXT(m_at) = copy_init;
3871 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3872 cookie_sz += SCTP_BUF_LEN(m_at);
3873 if (SCTP_BUF_NEXT(m_at) == NULL) {
3874 SCTP_BUF_NEXT(m_at) = copy_initack;
3878 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3879 cookie_sz += SCTP_BUF_LEN(m_at);
3880 if (SCTP_BUF_NEXT(m_at) == NULL) {
3884 sig = sctp_get_mbuf_for_msg(SCTP_SIGNATURE_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3886 /* no space, so free the entire chain */
3890 SCTP_BUF_NEXT(m_at) = sig;
3891 SCTP_BUF_LEN(sig) = SCTP_SIGNATURE_SIZE;
3892 cookie_sz += SCTP_SIGNATURE_SIZE;
3893 ph->param_length = htons(cookie_sz);
3894 *signature = (uint8_t *)mtod(sig, caddr_t);
3895 memset(*signature, 0, SCTP_SIGNATURE_SIZE);
3900 sctp_get_ect(struct sctp_tcb *stcb)
3902 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3903 return (SCTP_ECT0_BIT);
3909 #if defined(INET) || defined(INET6)
3911 sctp_handle_no_route(struct sctp_tcb *stcb,
3912 struct sctp_nets *net,
3915 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3918 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3919 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3920 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3921 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3922 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3923 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3927 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3928 net->dest_state &= ~SCTP_ADDR_PF;
3932 if (net == stcb->asoc.primary_destination) {
3933 /* need a new primary */
3934 struct sctp_nets *alt;
3936 alt = sctp_find_alternate_net(stcb, net, 0);
3938 if (stcb->asoc.alternate) {
3939 sctp_free_remote_addr(stcb->asoc.alternate);
3941 stcb->asoc.alternate = alt;
3942 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3943 if (net->ro._s_addr) {
3944 sctp_free_ifa(net->ro._s_addr);
3945 net->ro._s_addr = NULL;
3947 net->src_addr_selected = 0;
3956 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3957 struct sctp_tcb *stcb, /* may be NULL */
3958 struct sctp_nets *net,
3959 struct sockaddr *to,
3961 uint32_t auth_offset,
3962 struct sctp_auth_chunk *auth,
3963 uint16_t auth_keyid,
3964 int nofragment_flag,
3971 union sctp_sockstore *over_addr,
3972 uint8_t mflowtype, uint32_t mflowid,
3975 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3977 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3978 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3979 * - fill in the HMAC digest of any AUTH chunk in the packet.
3980 * - calculate and fill in the SCTP checksum.
3981 * - prepend an IP address header.
3982 * - if boundall use INADDR_ANY.
3983 * - if boundspecific do source address selection.
3984 * - set fragmentation option for ipV4.
3985 * - On return from IP output, check/adjust mtu size of output
3986 * interface and smallest_mtu size as well.
3988 /* Will need ifdefs around this */
3990 struct sctphdr *sctphdr;
3993 #if defined(INET) || defined(INET6)
3996 #if defined(INET) || defined(INET6)
3998 sctp_route_t *ro = NULL;
3999 struct udphdr *udp = NULL;
4003 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4004 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4008 #if defined(INET) || defined(INET6)
4010 vrf_id = stcb->asoc.vrf_id;
4012 vrf_id = inp->def_vrf_id;
4015 /* fill in the HMAC digest for any AUTH chunk in the packet */
4016 if ((auth != NULL) && (stcb != NULL)) {
4017 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4021 tos_value = net->dscp;
4023 tos_value = stcb->asoc.default_dscp;
4025 tos_value = inp->sctp_ep.default_dscp;
4028 switch (to->sa_family) {
4032 struct ip *ip = NULL;
4033 sctp_route_t iproute;
4036 len = SCTP_MIN_V4_OVERHEAD;
4038 len += sizeof(struct udphdr);
4040 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4043 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4046 SCTP_ALIGN_TO_END(newm, len);
4047 SCTP_BUF_LEN(newm) = len;
4048 SCTP_BUF_NEXT(newm) = m;
4051 m->m_pkthdr.flowid = net->flowid;
4052 M_HASHTYPE_SET(m, net->flowtype);
4054 m->m_pkthdr.flowid = mflowid;
4055 M_HASHTYPE_SET(m, mflowtype);
4057 packet_length = sctp_calculate_len(m);
4058 ip = mtod(m, struct ip *);
4059 ip->ip_v = IPVERSION;
4060 ip->ip_hl = (sizeof(struct ip) >> 2);
4061 if (tos_value == 0) {
4063 * This means especially, that it is not set
4064 * at the SCTP layer. So use the value from
4067 tos_value = inp->ip_inp.inp.inp_ip_tos;
4071 tos_value |= sctp_get_ect(stcb);
4073 if ((nofragment_flag) && (port == 0)) {
4074 ip->ip_off = htons(IP_DF);
4076 ip->ip_off = htons(0);
4078 /* FreeBSD has a function for ip_id's */
4081 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4082 ip->ip_len = htons(packet_length);
4083 ip->ip_tos = tos_value;
4085 ip->ip_p = IPPROTO_UDP;
4087 ip->ip_p = IPPROTO_SCTP;
4092 memset(&iproute, 0, sizeof(iproute));
4093 memcpy(&ro->ro_dst, to, to->sa_len);
4095 ro = (sctp_route_t *)&net->ro;
4097 /* Now the address selection part */
4098 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4100 /* call the routine to select the src address */
4101 if (net && out_of_asoc_ok == 0) {
4102 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4103 sctp_free_ifa(net->ro._s_addr);
4104 net->ro._s_addr = NULL;
4105 net->src_addr_selected = 0;
4108 if (net->src_addr_selected == 0) {
4109 /* Cache the source address */
4110 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4113 net->src_addr_selected = 1;
4115 if (net->ro._s_addr == NULL) {
4116 /* No route to host */
4117 net->src_addr_selected = 0;
4118 sctp_handle_no_route(stcb, net, so_locked);
4119 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4121 return (EHOSTUNREACH);
4123 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4125 if (over_addr == NULL) {
4126 struct sctp_ifa *_lsrc;
4128 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4132 if (_lsrc == NULL) {
4133 sctp_handle_no_route(stcb, net, so_locked);
4134 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4136 return (EHOSTUNREACH);
4138 ip->ip_src = _lsrc->address.sin.sin_addr;
4139 sctp_free_ifa(_lsrc);
4141 ip->ip_src = over_addr->sin.sin_addr;
4142 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4146 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4147 sctp_handle_no_route(stcb, net, so_locked);
4148 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4150 return (EHOSTUNREACH);
4152 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4153 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4154 udp->uh_dport = port;
4155 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4157 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4161 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4163 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4166 sctphdr->src_port = src_port;
4167 sctphdr->dest_port = dest_port;
4168 sctphdr->v_tag = v_tag;
4169 sctphdr->checksum = 0;
4172 * If source address selection fails and we find no
4173 * route then the ip_output should fail as well with
4174 * a NO_ROUTE_TO_HOST type error. We probably should
4175 * catch that somewhere and abort the association
4176 * right away (assuming this is an INIT being sent).
4178 if (ro->ro_nh == NULL) {
4180 * src addr selection failed to find a route
4181 * (or valid source addr), so we can't get
4182 * there from here (yet)!
4184 sctp_handle_no_route(stcb, net, so_locked);
4185 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4187 return (EHOSTUNREACH);
4189 if (ro != &iproute) {
4190 memcpy(&iproute, ro, sizeof(*ro));
4192 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4193 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4194 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4195 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4196 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4199 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4200 /* failed to prepend data, give up */
4201 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4205 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4207 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4208 SCTP_STAT_INCR(sctps_sendswcrc);
4210 SCTP_ENABLE_UDP_CSUM(o_pak);
4213 m->m_pkthdr.csum_flags = CSUM_SCTP;
4214 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4215 SCTP_STAT_INCR(sctps_sendhwcrc);
4217 #ifdef SCTP_PACKET_LOGGING
4218 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4219 sctp_packet_log(o_pak);
4221 /* send it out. table id is taken from stcb */
4222 SCTP_PROBE5(send, NULL, stcb, ip, stcb, sctphdr);
4223 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4225 UDPSTAT_INC(udps_opackets);
4227 SCTP_STAT_INCR(sctps_sendpackets);
4228 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4230 SCTP_STAT_INCR(sctps_senderrors);
4232 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4234 /* free tempy routes */
4237 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4238 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4241 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4244 mtu -= sizeof(struct udphdr);
4246 if (mtu < net->mtu) {
4247 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4248 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4253 } else if (ro->ro_nh == NULL) {
4254 /* route was freed */
4255 if (net->ro._s_addr &&
4256 net->src_addr_selected) {
4257 sctp_free_ifa(net->ro._s_addr);
4258 net->ro._s_addr = NULL;
4260 net->src_addr_selected = 0;
4269 uint32_t flowlabel, flowinfo;
4270 struct ip6_hdr *ip6h;
4271 struct route_in6 ip6route;
4273 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4275 struct sockaddr_in6 lsa6_storage;
4277 u_short prev_port = 0;
4281 flowlabel = net->flowlabel;
4283 flowlabel = stcb->asoc.default_flowlabel;
4285 flowlabel = inp->sctp_ep.default_flowlabel;
4287 if (flowlabel == 0) {
4289 * This means especially, that it is not set
4290 * at the SCTP layer. So use the value from
4293 flowlabel = ntohl(((struct inpcb *)inp)->inp_flow);
4295 flowlabel &= 0x000fffff;
4296 len = SCTP_MIN_OVERHEAD;
4298 len += sizeof(struct udphdr);
4300 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4303 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4306 SCTP_ALIGN_TO_END(newm, len);
4307 SCTP_BUF_LEN(newm) = len;
4308 SCTP_BUF_NEXT(newm) = m;
4311 m->m_pkthdr.flowid = net->flowid;
4312 M_HASHTYPE_SET(m, net->flowtype);
4314 m->m_pkthdr.flowid = mflowid;
4315 M_HASHTYPE_SET(m, mflowtype);
4317 packet_length = sctp_calculate_len(m);
4319 ip6h = mtod(m, struct ip6_hdr *);
4320 /* protect *sin6 from overwrite */
4321 sin6 = (struct sockaddr_in6 *)to;
4325 /* KAME hack: embed scopeid */
4326 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4327 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4332 memset(&ip6route, 0, sizeof(ip6route));
4333 ro = (sctp_route_t *)&ip6route;
4334 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4336 ro = (sctp_route_t *)&net->ro;
4339 * We assume here that inp_flow is in host byte
4340 * order within the TCB!
4342 if (tos_value == 0) {
4344 * This means especially, that it is not set
4345 * at the SCTP layer. So use the value from
4348 tos_value = (ntohl(((struct inpcb *)inp)->inp_flow) >> 20) & 0xff;
4352 tos_value |= sctp_get_ect(stcb);
4356 flowinfo |= tos_value;
4358 flowinfo |= flowlabel;
4359 ip6h->ip6_flow = htonl(flowinfo);
4361 ip6h->ip6_nxt = IPPROTO_UDP;
4363 ip6h->ip6_nxt = IPPROTO_SCTP;
4365 ip6h->ip6_plen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4366 ip6h->ip6_dst = sin6->sin6_addr;
4369 * Add SRC address selection here: we can only reuse
4370 * to a limited degree the kame src-addr-sel, since
4371 * we can try their selection but it may not be
4374 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4375 lsa6_tmp.sin6_family = AF_INET6;
4376 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4378 if (net && out_of_asoc_ok == 0) {
4379 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4380 sctp_free_ifa(net->ro._s_addr);
4381 net->ro._s_addr = NULL;
4382 net->src_addr_selected = 0;
4385 if (net->src_addr_selected == 0) {
4386 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4387 /* KAME hack: embed scopeid */
4388 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4389 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4393 /* Cache the source address */
4394 net->ro._s_addr = sctp_source_address_selection(inp,
4400 (void)sa6_recoverscope(sin6);
4401 net->src_addr_selected = 1;
4403 if (net->ro._s_addr == NULL) {
4404 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4405 net->src_addr_selected = 0;
4406 sctp_handle_no_route(stcb, net, so_locked);
4407 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4409 return (EHOSTUNREACH);
4411 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4413 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4414 /* KAME hack: embed scopeid */
4415 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4416 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4420 if (over_addr == NULL) {
4421 struct sctp_ifa *_lsrc;
4423 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4427 if (_lsrc == NULL) {
4428 sctp_handle_no_route(stcb, net, so_locked);
4429 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4431 return (EHOSTUNREACH);
4433 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4434 sctp_free_ifa(_lsrc);
4436 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4437 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4439 (void)sa6_recoverscope(sin6);
4441 lsa6->sin6_port = inp->sctp_lport;
4443 if (ro->ro_nh == NULL) {
4445 * src addr selection failed to find a route
4446 * (or valid source addr), so we can't get
4449 sctp_handle_no_route(stcb, net, so_locked);
4450 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4452 return (EHOSTUNREACH);
4455 * XXX: sa6 may not have a valid sin6_scope_id in
4456 * the non-SCOPEDROUTING case.
4458 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4459 lsa6_storage.sin6_family = AF_INET6;
4460 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4461 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4462 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4463 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4468 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4469 lsa6_storage.sin6_port = inp->sctp_lport;
4470 lsa6 = &lsa6_storage;
4471 ip6h->ip6_src = lsa6->sin6_addr;
4474 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4475 sctp_handle_no_route(stcb, net, so_locked);
4476 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4478 return (EHOSTUNREACH);
4480 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4481 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4482 udp->uh_dport = port;
4483 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4485 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4487 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4490 sctphdr->src_port = src_port;
4491 sctphdr->dest_port = dest_port;
4492 sctphdr->v_tag = v_tag;
4493 sctphdr->checksum = 0;
4496 * We set the hop limit now since there is a good
4497 * chance that our ro pointer is now filled
4499 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4500 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4503 /* Copy to be sure something bad is not happening */
4504 sin6->sin6_addr = ip6h->ip6_dst;
4505 lsa6->sin6_addr = ip6h->ip6_src;
4508 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4509 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4510 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4511 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4512 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4514 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4516 * preserve the port and scope for link
4519 prev_scope = sin6->sin6_scope_id;
4520 prev_port = sin6->sin6_port;
4523 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4524 /* failed to prepend data, give up */
4526 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4529 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4531 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4532 SCTP_STAT_INCR(sctps_sendswcrc);
4533 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4534 udp->uh_sum = 0xffff;
4537 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4538 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4539 SCTP_STAT_INCR(sctps_sendhwcrc);
4541 /* send it out. table id is taken from stcb */
4542 #ifdef SCTP_PACKET_LOGGING
4543 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4544 sctp_packet_log(o_pak);
4546 SCTP_PROBE5(send, NULL, stcb, ip6h, stcb, sctphdr);
4547 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4549 /* for link local this must be done */
4550 sin6->sin6_scope_id = prev_scope;
4551 sin6->sin6_port = prev_port;
4553 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4555 UDPSTAT_INC(udps_opackets);
4557 SCTP_STAT_INCR(sctps_sendpackets);
4558 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4560 SCTP_STAT_INCR(sctps_senderrors);
4563 /* Now if we had a temp route free it */
4567 * PMTU check versus smallest asoc MTU goes
4570 if (ro->ro_nh == NULL) {
4571 /* Route was freed */
4572 if (net->ro._s_addr &&
4573 net->src_addr_selected) {
4574 sctp_free_ifa(net->ro._s_addr);
4575 net->ro._s_addr = NULL;
4577 net->src_addr_selected = 0;
4579 if ((ro->ro_nh != NULL) && (net->ro._s_addr) &&
4580 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4583 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_nh);
4586 mtu -= sizeof(struct udphdr);
4588 if (mtu < net->mtu) {
4589 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4590 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4596 if (ND_IFINFO(ifp)->linkmtu &&
4597 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4598 sctp_mtu_size_reset(inp,
4600 ND_IFINFO(ifp)->linkmtu);
4608 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4609 ((struct sockaddr *)to)->sa_family);
4611 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4617 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked)
4619 struct mbuf *m, *m_last;
4620 struct sctp_nets *net;
4621 struct sctp_init_chunk *init;
4622 struct sctp_supported_addr_param *sup_addr;
4623 struct sctp_adaptation_layer_indication *ali;
4624 struct sctp_supported_chunk_types_param *pr_supported;
4625 struct sctp_paramhdr *ph;
4626 int cnt_inits_to = 0;
4628 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4630 /* INIT's always go to the primary (and usually ONLY address) */
4631 net = stcb->asoc.primary_destination;
4633 net = TAILQ_FIRST(&stcb->asoc.nets);
4638 /* we confirm any address we send an INIT to */
4639 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4640 (void)sctp_set_primary_addr(stcb, NULL, net);
4642 /* we confirm any address we send an INIT to */
4643 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4645 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4647 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4649 * special hook, if we are sending to link local it will not
4650 * show up in our private address count.
4652 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4656 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4657 /* This case should not happen */
4658 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4661 /* start the INIT timer */
4662 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4664 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4666 /* No memory, INIT timer will re-attempt. */
4667 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4670 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4672 /* Now lets put the chunk header in place */
4673 init = mtod(m, struct sctp_init_chunk *);
4674 /* now the chunk header */
4675 init->ch.chunk_type = SCTP_INITIATION;
4676 init->ch.chunk_flags = 0;
4677 /* fill in later from mbuf we build */
4678 init->ch.chunk_length = 0;
4679 /* place in my tag */
4680 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4681 /* set up some of the credits. */
4682 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4683 SCTP_MINIMAL_RWND));
4684 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4685 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4686 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4688 /* Adaptation layer indication parameter */
4689 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4690 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4691 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4692 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4693 ali->ph.param_length = htons(parameter_len);
4694 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4695 chunk_len += parameter_len;
4699 if (stcb->asoc.ecn_supported == 1) {
4700 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4701 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4702 ph->param_type = htons(SCTP_ECN_CAPABLE);
4703 ph->param_length = htons(parameter_len);
4704 chunk_len += parameter_len;
4707 /* PR-SCTP supported parameter */
4708 if (stcb->asoc.prsctp_supported == 1) {
4709 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4710 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4711 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4712 ph->param_length = htons(parameter_len);
4713 chunk_len += parameter_len;
4716 /* Add NAT friendly parameter. */
4717 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4718 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4719 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4720 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4721 ph->param_length = htons(parameter_len);
4722 chunk_len += parameter_len;
4725 /* And now tell the peer which extensions we support */
4727 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4728 if (stcb->asoc.prsctp_supported == 1) {
4729 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4730 if (stcb->asoc.idata_supported) {
4731 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4734 if (stcb->asoc.auth_supported == 1) {
4735 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4737 if (stcb->asoc.asconf_supported == 1) {
4738 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4739 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4741 if (stcb->asoc.reconfig_supported == 1) {
4742 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4744 if (stcb->asoc.idata_supported) {
4745 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4747 if (stcb->asoc.nrsack_supported == 1) {
4748 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4750 if (stcb->asoc.pktdrop_supported == 1) {
4751 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4754 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4755 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4756 pr_supported->ph.param_length = htons(parameter_len);
4757 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4758 chunk_len += parameter_len;
4760 /* add authentication parameters */
4761 if (stcb->asoc.auth_supported) {
4762 /* attach RANDOM parameter, if available */
4763 if (stcb->asoc.authinfo.random != NULL) {
4764 struct sctp_auth_random *randp;
4766 if (padding_len > 0) {
4767 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4768 chunk_len += padding_len;
4771 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4772 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4773 /* random key already contains the header */
4774 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4775 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4776 chunk_len += parameter_len;
4778 /* add HMAC_ALGO parameter */
4779 if (stcb->asoc.local_hmacs != NULL) {
4780 struct sctp_auth_hmac_algo *hmacs;
4782 if (padding_len > 0) {
4783 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4784 chunk_len += padding_len;
4787 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4788 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4789 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4790 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4791 hmacs->ph.param_length = htons(parameter_len);
4792 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4793 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4794 chunk_len += parameter_len;
4796 /* add CHUNKS parameter */
4797 if (stcb->asoc.local_auth_chunks != NULL) {
4798 struct sctp_auth_chunk_list *chunks;
4800 if (padding_len > 0) {
4801 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4802 chunk_len += padding_len;
4805 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4806 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4807 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4808 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4809 chunks->ph.param_length = htons(parameter_len);
4810 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4811 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4812 chunk_len += parameter_len;
4816 /* now any cookie time extensions */
4817 if (stcb->asoc.cookie_preserve_req > 0) {
4818 struct sctp_cookie_perserve_param *cookie_preserve;
4820 if (padding_len > 0) {
4821 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4822 chunk_len += padding_len;
4825 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4826 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4827 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4828 cookie_preserve->ph.param_length = htons(parameter_len);
4829 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4830 stcb->asoc.cookie_preserve_req = 0;
4831 chunk_len += parameter_len;
4834 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4837 if (padding_len > 0) {
4838 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4839 chunk_len += padding_len;
4842 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4843 if (stcb->asoc.scope.ipv4_addr_legal) {
4844 parameter_len += (uint16_t)sizeof(uint16_t);
4846 if (stcb->asoc.scope.ipv6_addr_legal) {
4847 parameter_len += (uint16_t)sizeof(uint16_t);
4849 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4850 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4851 sup_addr->ph.param_length = htons(parameter_len);
4853 if (stcb->asoc.scope.ipv4_addr_legal) {
4854 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4856 if (stcb->asoc.scope.ipv6_addr_legal) {
4857 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4859 padding_len = 4 - 2 * i;
4860 chunk_len += parameter_len;
4863 SCTP_BUF_LEN(m) = chunk_len;
4864 /* now the addresses */
4866 * To optimize this we could put the scoping stuff into a structure
4867 * and remove the individual uint8's from the assoc structure. Then
4868 * we could just sifa in the address within the stcb. But for now
4869 * this is a quick hack to get the address stuff teased apart.
4871 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4873 &padding_len, &chunk_len);
4875 init->ch.chunk_length = htons(chunk_len);
4876 if (padding_len > 0) {
4877 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4882 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4883 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4884 (struct sockaddr *)&net->ro._l_addr,
4885 m, 0, NULL, 0, 0, 0, 0,
4886 inp->sctp_lport, stcb->rport, htonl(0),
4890 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4891 if (error == ENOBUFS) {
4892 stcb->asoc.ifp_had_enobuf = 1;
4893 SCTP_STAT_INCR(sctps_lowlevelerr);
4896 stcb->asoc.ifp_had_enobuf = 0;
4898 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4899 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4903 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4904 int param_offset, int *abort_processing,
4905 struct sctp_chunkhdr *cp,
4910 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4911 * being equal to the beginning of the params i.e. (iphlen +
4912 * sizeof(struct sctp_init_msg) parse through the parameters to the
4913 * end of the mbuf verifying that all parameters are known.
4915 * For unknown parameters build and return a mbuf with
4916 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4917 * processing this chunk stop, and set *abort_processing to 1.
4919 * By having param_offset be pre-set to where parameters begin it is
4920 * hoped that this routine may be reused in the future by new
4923 struct sctp_paramhdr *phdr, params;
4925 struct mbuf *mat, *m_tmp, *op_err, *op_err_last;
4926 int at, limit, pad_needed;
4927 uint16_t ptype, plen, padded_size;
4929 *abort_processing = 0;
4930 if (cookie_found != NULL) {
4934 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4939 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4940 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4941 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4942 ptype = ntohs(phdr->param_type);
4943 plen = ntohs(phdr->param_length);
4944 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4945 /* wacked parameter */
4946 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4949 limit -= SCTP_SIZE32(plen);
4951 * All parameters for all chunks that we know/understand are
4952 * listed here. We process them other places and make
4953 * appropriate stop actions per the upper bits. However this
4954 * is the generic routine processor's can call to get back
4955 * an operr.. to either incorporate (init-ack) or send.
4957 padded_size = SCTP_SIZE32(plen);
4959 /* Param's with variable size */
4960 case SCTP_HEARTBEAT_INFO:
4961 case SCTP_UNRECOG_PARAM:
4962 case SCTP_ERROR_CAUSE_IND:
4966 case SCTP_STATE_COOKIE:
4967 if (cookie_found != NULL) {
4972 /* Param's with variable size within a range */
4973 case SCTP_CHUNK_LIST:
4974 case SCTP_SUPPORTED_CHUNK_EXT:
4975 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4976 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4981 case SCTP_SUPPORTED_ADDRTYPE:
4982 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4983 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4989 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4990 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4995 case SCTP_SET_PRIM_ADDR:
4996 case SCTP_DEL_IP_ADDRESS:
4997 case SCTP_ADD_IP_ADDRESS:
4998 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4999 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5000 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5005 /* Param's with a fixed size */
5006 case SCTP_IPV4_ADDRESS:
5007 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5008 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5013 case SCTP_IPV6_ADDRESS:
5014 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5015 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5020 case SCTP_COOKIE_PRESERVE:
5021 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5022 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5027 case SCTP_HAS_NAT_SUPPORT:
5030 case SCTP_PRSCTP_SUPPORTED:
5031 if (padded_size != sizeof(struct sctp_paramhdr)) {
5032 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5037 case SCTP_ECN_CAPABLE:
5038 if (padded_size != sizeof(struct sctp_paramhdr)) {
5039 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5044 case SCTP_ULP_ADAPTATION:
5045 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5046 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5051 case SCTP_SUCCESS_REPORT:
5052 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5053 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5058 case SCTP_HOSTNAME_ADDRESS:
5060 /* Hostname parameters are deprecated. */
5061 struct sctp_gen_error_cause *cause;
5064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5065 *abort_processing = 1;
5066 sctp_m_freem(op_err);
5070 l_len = SCTP_MIN_OVERHEAD;
5072 l_len = SCTP_MIN_V4_OVERHEAD;
5074 l_len += sizeof(struct sctp_chunkhdr);
5075 l_len += sizeof(struct sctp_gen_error_cause);
5076 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5077 if (op_err != NULL) {
5079 * Pre-reserve space for IP, SCTP,
5083 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5085 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5087 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5088 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5089 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
5090 cause = mtod(op_err, struct sctp_gen_error_cause *);
5091 cause->code = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5092 cause->length = htons((uint16_t)(sizeof(struct sctp_gen_error_cause) + plen));
5093 SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5094 if (SCTP_BUF_NEXT(op_err) == NULL) {
5095 sctp_m_freem(op_err);
5104 * we do not recognize the parameter figure out what
5107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5108 if ((ptype & 0x4000) == 0x4000) {
5109 /* Report bit is set?? */
5110 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5111 if (op_err == NULL) {
5114 /* Ok need to try to get an mbuf */
5116 l_len = SCTP_MIN_OVERHEAD;
5118 l_len = SCTP_MIN_V4_OVERHEAD;
5120 l_len += sizeof(struct sctp_chunkhdr);
5121 l_len += sizeof(struct sctp_paramhdr);
5122 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5124 SCTP_BUF_LEN(op_err) = 0;
5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5132 op_err_last = op_err;
5135 if (op_err != NULL) {
5136 /* If we have space */
5137 struct sctp_paramhdr *param;
5139 if (pad_needed > 0) {
5140 op_err_last = sctp_add_pad_tombuf(op_err_last, pad_needed);
5142 if (op_err_last == NULL) {
5143 sctp_m_freem(op_err);
5146 goto more_processing;
5148 if (M_TRAILINGSPACE(op_err_last) < (int)sizeof(struct sctp_paramhdr)) {
5149 m_tmp = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_NOWAIT, 1, MT_DATA);
5150 if (m_tmp == NULL) {
5151 sctp_m_freem(op_err);
5154 goto more_processing;
5156 SCTP_BUF_LEN(m_tmp) = 0;
5157 SCTP_BUF_NEXT(m_tmp) = NULL;
5158 SCTP_BUF_NEXT(op_err_last) = m_tmp;
5159 op_err_last = m_tmp;
5161 param = (struct sctp_paramhdr *)(mtod(op_err_last, caddr_t)+SCTP_BUF_LEN(op_err_last));
5162 param->param_type = htons(SCTP_UNRECOG_PARAM);
5163 param->param_length = htons((uint16_t)sizeof(struct sctp_paramhdr) + plen);
5164 SCTP_BUF_LEN(op_err_last) += sizeof(struct sctp_paramhdr);
5165 SCTP_BUF_NEXT(op_err_last) = SCTP_M_COPYM(mat, at, plen, M_NOWAIT);
5166 if (SCTP_BUF_NEXT(op_err_last) == NULL) {
5167 sctp_m_freem(op_err);
5170 goto more_processing;
5172 while (SCTP_BUF_NEXT(op_err_last) != NULL) {
5173 op_err_last = SCTP_BUF_NEXT(op_err_last);
5176 if (plen % 4 != 0) {
5177 pad_needed = 4 - (plen % 4);
5184 if ((ptype & 0x8000) == 0x0000) {
5185 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5188 /* skip this chunk and continue processing */
5189 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5190 at += SCTP_SIZE32(plen);
5194 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5198 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5199 *abort_processing = 1;
5200 sctp_m_freem(op_err);
5204 struct sctp_paramhdr *param;
5207 l_len = SCTP_MIN_OVERHEAD;
5209 l_len = SCTP_MIN_V4_OVERHEAD;
5211 l_len += sizeof(struct sctp_chunkhdr);
5212 l_len += (2 * sizeof(struct sctp_paramhdr));
5213 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5215 SCTP_BUF_LEN(op_err) = 0;
5217 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5219 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5221 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5222 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5223 SCTP_BUF_LEN(op_err) = 2 * sizeof(struct sctp_paramhdr);
5224 param = mtod(op_err, struct sctp_paramhdr *);
5225 param->param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5226 param->param_length = htons(2 * sizeof(struct sctp_paramhdr));
5228 param->param_type = htons(ptype);
5229 param->param_length = htons(plen);
5236 sctp_are_there_new_addresses(struct sctp_association *asoc,
5237 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5240 * Given a INIT packet, look through the packet to verify that there
5241 * are NO new addresses. As we go through the parameters add reports
5242 * of any un-understood parameters that require an error. Also we
5243 * must return (1) to drop the packet if we see a un-understood
5244 * parameter that tells us to drop the chunk.
5246 struct sockaddr *sa_touse;
5247 struct sockaddr *sa;
5248 struct sctp_paramhdr *phdr, params;
5249 uint16_t ptype, plen;
5251 struct sctp_nets *net;
5254 struct sockaddr_in sin4, *sa4;
5257 struct sockaddr_in6 sin6, *sa6;
5261 memset(&sin4, 0, sizeof(sin4));
5262 sin4.sin_family = AF_INET;
5263 sin4.sin_len = sizeof(sin4);
5266 memset(&sin6, 0, sizeof(sin6));
5267 sin6.sin6_family = AF_INET6;
5268 sin6.sin6_len = sizeof(sin6);
5270 /* First what about the src address of the pkt ? */
5272 switch (src->sa_family) {
5275 if (asoc->scope.ipv4_addr_legal) {
5282 if (asoc->scope.ipv6_addr_legal) {
5293 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5294 sa = (struct sockaddr *)&net->ro._l_addr;
5295 if (sa->sa_family == src->sa_family) {
5297 if (sa->sa_family == AF_INET) {
5298 struct sockaddr_in *src4;
5300 sa4 = (struct sockaddr_in *)sa;
5301 src4 = (struct sockaddr_in *)src;
5302 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5309 if (sa->sa_family == AF_INET6) {
5310 struct sockaddr_in6 *src6;
5312 sa6 = (struct sockaddr_in6 *)sa;
5313 src6 = (struct sockaddr_in6 *)src;
5314 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5323 /* New address added! no need to look further. */
5327 /* Ok so far lets munge through the rest of the packet */
5328 offset += sizeof(struct sctp_init_chunk);
5329 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5332 ptype = ntohs(phdr->param_type);
5333 plen = ntohs(phdr->param_length);
5336 case SCTP_IPV4_ADDRESS:
5338 struct sctp_ipv4addr_param *p4, p4_buf;
5340 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5343 phdr = sctp_get_next_param(in_initpkt, offset,
5344 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5348 if (asoc->scope.ipv4_addr_legal) {
5349 p4 = (struct sctp_ipv4addr_param *)phdr;
5350 sin4.sin_addr.s_addr = p4->addr;
5351 sa_touse = (struct sockaddr *)&sin4;
5357 case SCTP_IPV6_ADDRESS:
5359 struct sctp_ipv6addr_param *p6, p6_buf;
5361 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5364 phdr = sctp_get_next_param(in_initpkt, offset,
5365 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5369 if (asoc->scope.ipv6_addr_legal) {
5370 p6 = (struct sctp_ipv6addr_param *)phdr;
5371 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5373 sa_touse = (struct sockaddr *)&sin6;
5383 /* ok, sa_touse points to one to check */
5385 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5386 sa = (struct sockaddr *)&net->ro._l_addr;
5387 if (sa->sa_family != sa_touse->sa_family) {
5391 if (sa->sa_family == AF_INET) {
5392 sa4 = (struct sockaddr_in *)sa;
5393 if (sa4->sin_addr.s_addr ==
5394 sin4.sin_addr.s_addr) {
5401 if (sa->sa_family == AF_INET6) {
5402 sa6 = (struct sockaddr_in6 *)sa;
5403 if (SCTP6_ARE_ADDR_EQUAL(
5412 /* New addr added! no need to look further */
5416 offset += SCTP_SIZE32(plen);
5417 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5423 * Given a MBUF chain that was sent into us containing an INIT. Build a
5424 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5425 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5426 * message (i.e. the struct sctp_init_msg).
5429 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5430 struct sctp_nets *src_net, struct mbuf *init_pkt,
5431 int iphlen, int offset,
5432 struct sockaddr *src, struct sockaddr *dst,
5433 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5434 uint8_t mflowtype, uint32_t mflowid,
5435 uint32_t vrf_id, uint16_t port)
5437 struct sctp_association *asoc;
5438 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5439 struct sctp_init_ack_chunk *initack;
5440 struct sctp_adaptation_layer_indication *ali;
5441 struct sctp_supported_chunk_types_param *pr_supported;
5442 struct sctp_paramhdr *ph;
5443 union sctp_sockstore *over_addr;
5444 struct sctp_scoping scp;
5447 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5448 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5449 struct sockaddr_in *sin;
5452 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5453 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5454 struct sockaddr_in6 *sin6;
5456 struct sockaddr *to;
5457 struct sctp_state_cookie stc;
5458 struct sctp_nets *net = NULL;
5459 uint8_t *signature = NULL;
5460 int cnt_inits_to = 0;
5461 uint16_t his_limit, i_want;
5463 int nat_friendly = 0;
5466 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5473 if ((asoc != NULL) &&
5474 (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
5475 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5477 * new addresses, out of here in non-cookie-wait
5480 * Send an ABORT, without the new address error
5481 * cause. This looks no different than if no
5482 * listener was present.
5484 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5486 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5487 mflowtype, mflowid, inp->fibnum,
5491 if (src_net != NULL && (src_net->port != port)) {
5493 * change of remote encapsulation port, out of here
5494 * in non-cookie-wait states
5496 * Send an ABORT, without an specific error cause.
5497 * This looks no different than if no listener was
5500 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5501 "Remote encapsulation port changed");
5502 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5503 mflowtype, mflowid, inp->fibnum,
5509 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5510 (offset + sizeof(struct sctp_init_chunk)),
5512 (struct sctp_chunkhdr *)init_chk,
5513 &nat_friendly, NULL);
5516 if (op_err == NULL) {
5517 char msg[SCTP_DIAG_INFO_LEN];
5519 SCTP_SNPRINTF(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5520 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5523 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5524 init_chk->init.initiate_tag, op_err,
5525 mflowtype, mflowid, inp->fibnum,
5529 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5531 /* No memory, INIT timer will re-attempt. */
5532 sctp_m_freem(op_err);
5535 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5539 * We might not overwrite the identification[] completely and on
5540 * some platforms time_entered will contain some padding. Therefore
5541 * zero out the cookie to avoid putting uninitialized memory on the
5544 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5546 /* the time I built cookie */
5547 (void)SCTP_GETTIME_TIMEVAL(&now);
5548 stc.time_entered.tv_sec = now.tv_sec;
5549 stc.time_entered.tv_usec = now.tv_usec;
5551 /* populate any tie tags */
5553 /* unlock before tag selections */
5554 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5555 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5556 stc.cookie_life = asoc->cookie_life;
5557 net = asoc->primary_destination;
5559 stc.tie_tag_my_vtag = 0;
5560 stc.tie_tag_peer_vtag = 0;
5561 /* life I will award this cookie */
5562 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5565 /* copy in the ports for later check */
5566 stc.myport = sh->dest_port;
5567 stc.peerport = sh->src_port;
5570 * If we wanted to honor cookie life extensions, we would add to
5571 * stc.cookie_life. For now we should NOT honor any extension
5573 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5574 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5575 stc.ipv6_addr_legal = 1;
5576 if (SCTP_IPV6_V6ONLY(inp)) {
5577 stc.ipv4_addr_legal = 0;
5579 stc.ipv4_addr_legal = 1;
5582 stc.ipv6_addr_legal = 0;
5583 stc.ipv4_addr_legal = 1;
5588 switch (dst->sa_family) {
5592 /* lookup address */
5593 stc.address[0] = src4->sin_addr.s_addr;
5597 stc.addr_type = SCTP_IPV4_ADDRESS;
5598 /* local from address */
5599 stc.laddress[0] = dst4->sin_addr.s_addr;
5600 stc.laddress[1] = 0;
5601 stc.laddress[2] = 0;
5602 stc.laddress[3] = 0;
5603 stc.laddr_type = SCTP_IPV4_ADDRESS;
5604 /* scope_id is only for v6 */
5606 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5607 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5610 /* Must use the address in this case */
5611 if (sctp_is_address_on_local_host(src, vrf_id)) {
5612 stc.loopback_scope = 1;
5615 stc.local_scope = 0;
5623 stc.addr_type = SCTP_IPV6_ADDRESS;
5624 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5625 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5626 if (sctp_is_address_on_local_host(src, vrf_id)) {
5627 stc.loopback_scope = 1;
5628 stc.local_scope = 0;
5631 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5632 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5634 * If the new destination or source
5635 * is a LINK_LOCAL we must have
5636 * common both site and local scope.
5637 * Don't set local scope though
5638 * since we must depend on the
5639 * source to be added implicitly. We
5640 * cannot assure just because we
5641 * share one link that all links are
5644 stc.local_scope = 0;
5648 * we start counting for the private
5649 * address stuff at 1. since the
5650 * link local we source from won't
5651 * show up in our scoped count.
5655 * pull out the scope_id from
5658 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5659 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5661 * If the new destination or source
5662 * is SITE_LOCAL then we must have
5663 * site scope in common.
5667 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5668 stc.laddr_type = SCTP_IPV6_ADDRESS;
5678 /* set the scope per the existing tcb */
5681 struct sctp_nets *lnet;
5684 stc.loopback_scope = asoc->scope.loopback_scope;
5685 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5686 stc.site_scope = asoc->scope.site_scope;
5687 stc.local_scope = asoc->scope.local_scope;
5689 /* Why do we not consider IPv4 LL addresses? */
5690 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5691 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5692 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5694 * if we have a LL address, start
5702 /* use the net pointer */
5703 to = (struct sockaddr *)&net->ro._l_addr;
5704 switch (to->sa_family) {
5707 sin = (struct sockaddr_in *)to;
5708 stc.address[0] = sin->sin_addr.s_addr;
5712 stc.addr_type = SCTP_IPV4_ADDRESS;
5713 if (net->src_addr_selected == 0) {
5715 * strange case here, the INIT should have
5716 * did the selection.
5718 net->ro._s_addr = sctp_source_address_selection(inp,
5719 stcb, (sctp_route_t *)&net->ro,
5721 if (net->ro._s_addr == NULL) {
5722 sctp_m_freem(op_err);
5727 net->src_addr_selected = 1;
5729 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5730 stc.laddress[1] = 0;
5731 stc.laddress[2] = 0;
5732 stc.laddress[3] = 0;
5733 stc.laddr_type = SCTP_IPV4_ADDRESS;
5734 /* scope_id is only for v6 */
5740 sin6 = (struct sockaddr_in6 *)to;
5741 memcpy(&stc.address, &sin6->sin6_addr,
5742 sizeof(struct in6_addr));
5743 stc.addr_type = SCTP_IPV6_ADDRESS;
5744 stc.scope_id = sin6->sin6_scope_id;
5745 if (net->src_addr_selected == 0) {
5747 * strange case here, the INIT should have
5748 * done the selection.
5750 net->ro._s_addr = sctp_source_address_selection(inp,
5751 stcb, (sctp_route_t *)&net->ro,
5753 if (net->ro._s_addr == NULL) {
5754 sctp_m_freem(op_err);
5759 net->src_addr_selected = 1;
5761 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5762 sizeof(struct in6_addr));
5763 stc.laddr_type = SCTP_IPV6_ADDRESS;
5768 /* Now lets put the SCTP header in place */
5769 initack = mtod(m, struct sctp_init_ack_chunk *);
5770 /* Save it off for quick ref */
5771 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5773 memcpy(stc.identification, SCTP_VERSION_STRING,
5774 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5775 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5776 /* now the chunk header */
5777 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5778 initack->ch.chunk_flags = 0;
5779 /* fill in later from mbuf we build */
5780 initack->ch.chunk_length = 0;
5781 /* place in my tag */
5782 if ((asoc != NULL) &&
5783 ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
5784 (SCTP_GET_STATE(stcb) == SCTP_STATE_INUSE) ||
5785 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED))) {
5786 /* re-use the v-tags and init-seq here */
5787 initack->init.initiate_tag = htonl(asoc->my_vtag);
5788 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5790 uint32_t vtag, itsn;
5793 atomic_add_int(&asoc->refcnt, 1);
5794 SCTP_TCB_UNLOCK(stcb);
5796 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5797 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5799 * Got a duplicate vtag on some guy behind a
5800 * nat make sure we don't use it.
5804 initack->init.initiate_tag = htonl(vtag);
5805 /* get a TSN to use too */
5806 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5807 initack->init.initial_tsn = htonl(itsn);
5808 SCTP_TCB_LOCK(stcb);
5809 atomic_add_int(&asoc->refcnt, -1);
5811 SCTP_INP_INCR_REF(inp);
5812 SCTP_INP_RUNLOCK(inp);
5813 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5814 initack->init.initiate_tag = htonl(vtag);
5815 /* get a TSN to use too */
5816 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5817 SCTP_INP_RLOCK(inp);
5818 SCTP_INP_DECR_REF(inp);
5821 /* save away my tag to */
5822 stc.my_vtag = initack->init.initiate_tag;
5824 /* set up some of the credits. */
5825 so = inp->sctp_socket;
5827 /* memory problem */
5828 sctp_m_freem(op_err);
5832 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5834 /* set what I want */
5835 his_limit = ntohs(init_chk->init.num_inbound_streams);
5836 /* choose what I want */
5838 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5839 i_want = asoc->streamoutcnt;
5841 i_want = asoc->pre_open_streams;
5844 i_want = inp->sctp_ep.pre_open_stream_count;
5846 if (his_limit < i_want) {
5847 /* I Want more :< */
5848 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5850 /* I can have what I want :> */
5851 initack->init.num_outbound_streams = htons(i_want);
5853 /* tell him his limit. */
5854 initack->init.num_inbound_streams =
5855 htons(inp->sctp_ep.max_open_streams_intome);
5857 /* adaptation layer indication parameter */
5858 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5859 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5860 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5861 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5862 ali->ph.param_length = htons(parameter_len);
5863 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5864 chunk_len += parameter_len;
5868 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5869 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5870 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5871 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5872 ph->param_type = htons(SCTP_ECN_CAPABLE);
5873 ph->param_length = htons(parameter_len);
5874 chunk_len += parameter_len;
5877 /* PR-SCTP supported parameter */
5878 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5879 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5880 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5881 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5882 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5883 ph->param_length = htons(parameter_len);
5884 chunk_len += parameter_len;
5887 /* Add NAT friendly parameter */
5889 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5890 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5891 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5892 ph->param_length = htons(parameter_len);
5893 chunk_len += parameter_len;
5896 /* And now tell the peer which extensions we support */
5898 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5899 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5900 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5901 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5902 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5903 ((asoc == NULL) && (inp->idata_supported == 1))) {
5904 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5907 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5908 ((asoc == NULL) && (inp->auth_supported == 1))) {
5909 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5911 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5912 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5913 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5914 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5916 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5917 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5918 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5920 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5921 ((asoc == NULL) && (inp->idata_supported == 1))) {
5922 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5924 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5925 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5926 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5928 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5929 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5930 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5933 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5934 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5935 pr_supported->ph.param_length = htons(parameter_len);
5936 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5937 chunk_len += parameter_len;
5940 /* add authentication parameters */
5941 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5942 ((asoc == NULL) && (inp->auth_supported == 1))) {
5943 struct sctp_auth_random *randp;
5944 struct sctp_auth_hmac_algo *hmacs;
5945 struct sctp_auth_chunk_list *chunks;
5947 if (padding_len > 0) {
5948 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5949 chunk_len += padding_len;
5952 /* generate and add RANDOM parameter */
5953 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5954 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
5955 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5956 randp->ph.param_type = htons(SCTP_RANDOM);
5957 randp->ph.param_length = htons(parameter_len);
5958 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5959 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5960 chunk_len += parameter_len;
5962 if (padding_len > 0) {
5963 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5964 chunk_len += padding_len;
5967 /* add HMAC_ALGO parameter */
5968 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5969 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
5970 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5971 (uint8_t *)hmacs->hmac_ids);
5972 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5973 hmacs->ph.param_length = htons(parameter_len);
5974 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5975 chunk_len += parameter_len;
5977 if (padding_len > 0) {
5978 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5979 chunk_len += padding_len;
5982 /* add CHUNKS parameter */
5983 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5984 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
5985 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5986 chunks->chunk_types);
5987 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5988 chunks->ph.param_length = htons(parameter_len);
5989 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5990 chunk_len += parameter_len;
5992 SCTP_BUF_LEN(m) = chunk_len;
5994 /* now the addresses */
5996 * To optimize this we could put the scoping stuff into a structure
5997 * and remove the individual uint8's from the stc structure. Then we
5998 * could just sifa in the address within the stc.. but for now this
5999 * is a quick hack to get the address stuff teased apart.
6001 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6002 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6003 scp.loopback_scope = stc.loopback_scope;
6004 scp.ipv4_local_scope = stc.ipv4_scope;
6005 scp.local_scope = stc.local_scope;
6006 scp.site_scope = stc.site_scope;
6007 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6009 &padding_len, &chunk_len);
6010 /* padding_len can only be positive, if no addresses have been added */
6011 if (padding_len > 0) {
6012 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6013 chunk_len += padding_len;
6014 SCTP_BUF_LEN(m) += padding_len;
6018 /* tack on the operational error if present */
6021 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6022 parameter_len += SCTP_BUF_LEN(m_tmp);
6024 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6025 SCTP_BUF_NEXT(m_last) = op_err;
6026 while (SCTP_BUF_NEXT(m_last) != NULL) {
6027 m_last = SCTP_BUF_NEXT(m_last);
6029 chunk_len += parameter_len;
6031 if (padding_len > 0) {
6032 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6033 if (m_last == NULL) {
6034 /* Houston we have a problem, no space */
6038 chunk_len += padding_len;
6041 /* Now we must build a cookie */
6042 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6043 if (m_cookie == NULL) {
6044 /* memory problem */
6048 /* Now append the cookie to the end and update the space/size */
6049 SCTP_BUF_NEXT(m_last) = m_cookie;
6051 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6052 parameter_len += SCTP_BUF_LEN(m_tmp);
6053 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6057 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6058 chunk_len += parameter_len;
6061 * Place in the size, but we don't include the last pad (if any) in
6064 initack->ch.chunk_length = htons(chunk_len);
6067 * Time to sign the cookie, we don't sign over the cookie signature
6068 * though thus we set trailer.
6070 (void)sctp_hmac_m(SCTP_HMAC,
6071 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6072 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6073 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6075 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6076 * here since the timer will drive a retranmission.
6078 if (padding_len > 0) {
6079 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6084 if (stc.loopback_scope) {
6085 over_addr = (union sctp_sockstore *)dst;
6090 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6092 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6095 SCTP_SO_NOT_LOCKED))) {
6096 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6097 if (error == ENOBUFS) {
6099 asoc->ifp_had_enobuf = 1;
6101 SCTP_STAT_INCR(sctps_lowlevelerr);
6105 asoc->ifp_had_enobuf = 0;
6108 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6112 sctp_prune_prsctp(struct sctp_tcb *stcb,
6113 struct sctp_association *asoc,
6114 struct sctp_sndrcvinfo *srcv,
6118 struct sctp_tmit_chunk *chk, *nchk;
6120 SCTP_TCB_LOCK_ASSERT(stcb);
6121 if ((asoc->prsctp_supported) &&
6122 (asoc->sent_queue_cnt_removeable > 0)) {
6123 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6125 * Look for chunks marked with the PR_SCTP flag AND
6126 * the buffer space flag. If the one being sent is
6127 * equal or greater priority then purge the old one
6128 * and free some space.
6130 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6132 * This one is PR-SCTP AND buffer space
6135 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6137 * Lower numbers equates to higher
6138 * priority. So if the one we are
6139 * looking at has a larger priority,
6140 * we want to drop the data and NOT
6145 * We release the book_size
6146 * if the mbuf is here
6151 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6155 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6158 freed_spc += ret_spc;
6159 if (freed_spc >= dataout) {
6162 } /* if chunk was present */
6163 } /* if of sufficient priority */
6164 } /* if chunk has enabled */
6165 } /* tailqforeach */
6167 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6168 /* Here we must move to the sent queue and mark */
6169 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6170 if (chk->rec.data.timetodrop.tv_sec > (long)srcv->sinfo_timetolive) {
6173 * We release the book_size
6174 * if the mbuf is here
6178 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6181 freed_spc += ret_spc;
6182 if (freed_spc >= dataout) {
6185 } /* end if chk->data */
6186 } /* end if right class */
6187 } /* end if chk pr-sctp */
6188 } /* tailqforeachsafe (chk) */
6189 } /* if enabled in asoc */
6193 sctp_get_frag_point(struct sctp_tcb *stcb,
6194 struct sctp_association *asoc)
6199 * For endpoints that have both v6 and v4 addresses we must reserve
6200 * room for the ipv6 header, for those that are only dealing with V4
6201 * we use a larger frag point.
6203 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6204 ovh = SCTP_MIN_OVERHEAD;
6206 ovh = SCTP_MIN_V4_OVERHEAD;
6208 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6209 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6210 siz = asoc->smallest_mtu - ovh;
6212 siz = (stcb->asoc.sctp_frag_point - ovh);
6214 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6216 /* A data chunk MUST fit in a cluster */
6217 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6220 /* adjust for an AUTH chunk if DATA requires auth */
6221 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6222 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6225 /* make it an even word boundary please */
6232 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6235 * We assume that the user wants PR_SCTP_TTL if the user provides a
6236 * positive lifetime but does not specify any PR_SCTP policy.
6238 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6239 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6240 } else if (sp->timetolive > 0) {
6241 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6242 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6246 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6247 case CHUNK_FLAGS_PR_SCTP_BUF:
6249 * Time to live is a priority stored in tv_sec when doing
6250 * the buffer drop thing.
6252 sp->ts.tv_sec = sp->timetolive;
6255 case CHUNK_FLAGS_PR_SCTP_TTL:
6259 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6260 tv.tv_sec = sp->timetolive / 1000;
6261 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6263 * TODO sctp_constants.h needs alternative time
6264 * macros when _KERNEL is undefined.
6266 timevaladd(&sp->ts, &tv);
6269 case CHUNK_FLAGS_PR_SCTP_RTX:
6271 * Time to live is a the number or retransmissions stored in
6274 sp->ts.tv_sec = sp->timetolive;
6278 SCTPDBG(SCTP_DEBUG_USRREQ1,
6279 "Unknown PR_SCTP policy %u.\n",
6280 PR_SCTP_POLICY(sp->sinfo_flags));
6286 sctp_msg_append(struct sctp_tcb *stcb,
6287 struct sctp_nets *net,
6289 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6293 struct sctp_stream_queue_pending *sp = NULL;
6294 struct sctp_stream_out *strm;
6297 * Given an mbuf chain, put it into the association send queue and
6298 * place it on the wheel
6300 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6301 /* Invalid stream number */
6302 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6306 if ((stcb->asoc.stream_locked) &&
6307 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6308 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6312 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6313 /* Now can we send this? */
6314 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
6315 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6316 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6317 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6318 /* got data while shutting down */
6319 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6323 sctp_alloc_a_strmoq(stcb, sp);
6325 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6329 sp->sinfo_flags = srcv->sinfo_flags;
6330 sp->timetolive = srcv->sinfo_timetolive;
6331 sp->ppid = srcv->sinfo_ppid;
6332 sp->context = srcv->sinfo_context;
6334 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6336 atomic_add_int(&sp->net->ref_count, 1);
6340 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6341 sp->sid = srcv->sinfo_stream;
6342 sp->msg_is_complete = 1;
6343 sp->sender_all_done = 1;
6346 sp->tail_mbuf = NULL;
6347 sctp_set_prsctp_policy(sp);
6349 * We could in theory (for sendall) sifa the length in, but we would
6350 * still have to hunt through the chain since we need to setup the
6354 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6355 if (SCTP_BUF_NEXT(at) == NULL)
6357 sp->length += SCTP_BUF_LEN(at);
6359 if (srcv->sinfo_keynumber_valid) {
6360 sp->auth_keyid = srcv->sinfo_keynumber;
6362 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6364 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6365 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6366 sp->holds_key_ref = 1;
6368 if (hold_stcb_lock == 0) {
6369 SCTP_TCB_SEND_LOCK(stcb);
6371 sctp_snd_sb_alloc(stcb, sp->length);
6372 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6373 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6374 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6376 if (hold_stcb_lock == 0) {
6377 SCTP_TCB_SEND_UNLOCK(stcb);
6386 static struct mbuf *
6387 sctp_copy_mbufchain(struct mbuf *clonechain,
6388 struct mbuf *outchain,
6389 struct mbuf **endofchain,
6392 uint8_t copy_by_ref)
6395 struct mbuf *appendchain;
6399 if (endofchain == NULL) {
6403 sctp_m_freem(outchain);
6406 if (can_take_mbuf) {
6407 appendchain = clonechain;
6410 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))) {
6411 /* Its not in a cluster */
6412 if (*endofchain == NULL) {
6413 /* lets get a mbuf cluster */
6414 if (outchain == NULL) {
6415 /* This is the general case */
6417 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6418 if (outchain == NULL) {
6421 SCTP_BUF_LEN(outchain) = 0;
6422 *endofchain = outchain;
6423 /* get the prepend space */
6424 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6427 * We really should not get a NULL
6433 if (SCTP_BUF_NEXT(m) == NULL) {
6437 m = SCTP_BUF_NEXT(m);
6440 if (*endofchain == NULL) {
6442 * huh, TSNH XXX maybe we
6445 sctp_m_freem(outchain);
6449 /* get the new end of length */
6450 len = (int)M_TRAILINGSPACE(*endofchain);
6452 /* how much is left at the end? */
6453 len = (int)M_TRAILINGSPACE(*endofchain);
6455 /* Find the end of the data, for appending */
6456 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6458 /* Now lets copy it out */
6459 if (len >= sizeofcpy) {
6460 /* It all fits, copy it in */
6461 m_copydata(clonechain, 0, sizeofcpy, cp);
6462 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6464 /* fill up the end of the chain */
6466 m_copydata(clonechain, 0, len, cp);
6467 SCTP_BUF_LEN((*endofchain)) += len;
6468 /* now we need another one */
6471 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6476 SCTP_BUF_NEXT((*endofchain)) = m;
6478 cp = mtod((*endofchain), caddr_t);
6479 m_copydata(clonechain, len, sizeofcpy, cp);
6480 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6484 /* copy the old fashion way */
6485 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6486 #ifdef SCTP_MBUF_LOGGING
6487 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6488 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6493 if (appendchain == NULL) {
6496 sctp_m_freem(outchain);
6500 /* tack on to the end */
6501 if (*endofchain != NULL) {
6502 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6506 if (SCTP_BUF_NEXT(m) == NULL) {
6507 SCTP_BUF_NEXT(m) = appendchain;
6510 m = SCTP_BUF_NEXT(m);
6514 * save off the end and update the end-chain position
6518 if (SCTP_BUF_NEXT(m) == NULL) {
6522 m = SCTP_BUF_NEXT(m);
6526 /* save off the end and update the end-chain position */
6529 if (SCTP_BUF_NEXT(m) == NULL) {
6533 m = SCTP_BUF_NEXT(m);
6535 return (appendchain);
6540 sctp_med_chunk_output(struct sctp_inpcb *inp,
6541 struct sctp_tcb *stcb,
6542 struct sctp_association *asoc,
6545 int control_only, int from_where,
6546 struct timeval *now, int *now_filled, int frag_point, int so_locked);
6549 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6550 uint32_t val SCTP_UNUSED)
6552 struct sctp_copy_all *ca;
6555 int added_control = 0;
6556 int un_sent, do_chunk_output = 1;
6557 struct sctp_association *asoc;
6558 struct sctp_nets *net;
6560 ca = (struct sctp_copy_all *)ptr;
6561 if (ca->m == NULL) {
6564 if (ca->inp != inp) {
6568 if (ca->sndlen > 0) {
6569 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6571 /* can't copy so we are done */
6575 #ifdef SCTP_MBUF_LOGGING
6576 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6577 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6583 SCTP_TCB_LOCK_ASSERT(stcb);
6584 if (stcb->asoc.alternate) {
6585 net = stcb->asoc.alternate;
6587 net = stcb->asoc.primary_destination;
6589 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6590 /* Abort this assoc with m as the user defined reason */
6592 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6594 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6595 0, M_NOWAIT, 1, MT_DATA);
6596 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6599 struct sctp_paramhdr *ph;
6601 ph = mtod(m, struct sctp_paramhdr *);
6602 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6603 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6606 * We add one here to keep the assoc from dis-appearing on
6609 atomic_add_int(&stcb->asoc.refcnt, 1);
6610 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6612 * sctp_abort_an_association calls sctp_free_asoc() free
6613 * association will NOT free it since we incremented the
6614 * refcnt .. we do this to prevent it being freed and things
6615 * getting tricky since we could end up (from free_asoc)
6616 * calling inpcb_free which would get a recursive lock call
6617 * to the iterator lock.. But as a consequence of that the
6618 * stcb will return to us un-locked.. since free_asoc
6619 * returns with either no TCB or the TCB unlocked, we must
6620 * relock.. to unlock in the iterator timer :-0
6622 SCTP_TCB_LOCK(stcb);
6623 atomic_add_int(&stcb->asoc.refcnt, -1);
6624 goto no_chunk_output;
6627 ret = sctp_msg_append(stcb, net, m,
6631 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6632 /* shutdown this assoc */
6633 if (TAILQ_EMPTY(&asoc->send_queue) &&
6634 TAILQ_EMPTY(&asoc->sent_queue) &&
6635 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6636 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6640 * there is nothing queued to send, so I'm
6643 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6644 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6645 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6647 * only send SHUTDOWN the first time
6650 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
6651 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6653 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
6654 sctp_stop_timers_for_shutdown(stcb);
6655 sctp_send_shutdown(stcb, net);
6656 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6658 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6661 do_chunk_output = 0;
6665 * we still got (or just got) data to send,
6666 * so set SHUTDOWN_PENDING
6669 * XXX sockets draft says that SCTP_EOF
6670 * should be sent with no data. currently,
6671 * we will allow user data to be sent first
6672 * and move to SHUTDOWN-PENDING
6674 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
6675 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6676 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6677 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6678 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
6680 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
6681 if (TAILQ_EMPTY(&asoc->send_queue) &&
6682 TAILQ_EMPTY(&asoc->sent_queue) &&
6683 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6684 struct mbuf *op_err;
6685 char msg[SCTP_DIAG_INFO_LEN];
6688 SCTP_SNPRINTF(msg, sizeof(msg),
6689 "%s:%d at %s", __FILE__, __LINE__, __func__);
6690 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6692 atomic_add_int(&stcb->asoc.refcnt, 1);
6693 sctp_abort_an_association(stcb->sctp_ep, stcb,
6694 op_err, SCTP_SO_NOT_LOCKED);
6695 atomic_add_int(&stcb->asoc.refcnt, -1);
6696 goto no_chunk_output;
6698 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6704 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6705 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6707 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6708 (stcb->asoc.total_flight > 0) &&
6709 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6710 do_chunk_output = 0;
6712 if (do_chunk_output)
6713 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6714 else if (added_control) {
6715 int num_out, reason, now_filled = 0;
6719 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6720 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6721 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6732 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6734 struct sctp_copy_all *ca;
6736 ca = (struct sctp_copy_all *)ptr;
6738 * Do a notify here? Kacheong suggests that the notify be done at
6739 * the send time.. so you would push up a notification if any send
6740 * failed. Don't know if this is feasible since the only failures we
6741 * have is "memory" related and if you cannot get an mbuf to send
6742 * the data you surely can't get an mbuf to send up to notify the
6743 * user you can't send the data :->
6746 /* now free everything */
6748 /* Lets clear the flag to allow others to run. */
6749 ca->inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6751 sctp_m_freem(ca->m);
6752 SCTP_FREE(ca, SCTP_M_COPYAL);
6755 static struct mbuf *
6756 sctp_copy_out_all(struct uio *uio, ssize_t len)
6758 struct mbuf *ret, *at;
6759 ssize_t left, willcpy, cancpy, error;
6761 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6767 SCTP_BUF_LEN(ret) = 0;
6768 /* save space for the data chunk header */
6769 cancpy = (int)M_TRAILINGSPACE(ret);
6770 willcpy = min(cancpy, left);
6773 /* Align data to the end */
6774 error = uiomove(mtod(at, caddr_t), (int)willcpy, uio);
6780 SCTP_BUF_LEN(at) = (int)willcpy;
6781 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6784 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg((unsigned int)left, 0, M_WAITOK, 1, MT_DATA);
6785 if (SCTP_BUF_NEXT(at) == NULL) {
6788 at = SCTP_BUF_NEXT(at);
6789 SCTP_BUF_LEN(at) = 0;
6790 cancpy = (int)M_TRAILINGSPACE(at);
6791 willcpy = min(cancpy, left);
6798 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6799 struct sctp_sndrcvinfo *srcv)
6802 struct sctp_copy_all *ca;
6804 if (inp->sctp_flags & SCTP_PCB_FLAGS_SND_ITERATOR_UP) {
6805 /* There is another. */
6808 if (uio->uio_resid > (ssize_t)SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
6809 /* You must not be larger than the limit! */
6812 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6819 memset(ca, 0, sizeof(struct sctp_copy_all));
6823 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6826 * take off the sendall flag, it would be bad if we failed to do
6829 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6830 /* get length and mbuf chain */
6832 ca->sndlen = uio->uio_resid;
6833 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6834 if (ca->m == NULL) {
6835 SCTP_FREE(ca, SCTP_M_COPYAL);
6836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6840 /* Gather the length of the send */
6844 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6845 ca->sndlen += SCTP_BUF_LEN(mat);
6848 inp->sctp_flags |= SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6849 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6850 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6851 SCTP_ASOC_ANY_STATE,
6853 sctp_sendall_completes, inp, 1);
6855 inp->sctp_flags &= ~SCTP_PCB_FLAGS_SND_ITERATOR_UP;
6856 SCTP_FREE(ca, SCTP_M_COPYAL);
6857 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6864 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6866 struct sctp_tmit_chunk *chk, *nchk;
6868 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6869 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6870 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6871 asoc->ctrl_queue_cnt--;
6873 sctp_m_freem(chk->data);
6876 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6882 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6884 struct sctp_association *asoc;
6885 struct sctp_tmit_chunk *chk, *nchk;
6886 struct sctp_asconf_chunk *acp;
6889 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6890 /* find SCTP_ASCONF chunk in queue */
6891 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6893 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6894 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6899 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6900 asoc->ctrl_queue_cnt--;
6902 sctp_m_freem(chk->data);
6905 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6911 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6912 struct sctp_association *asoc,
6913 struct sctp_tmit_chunk **data_list,
6915 struct sctp_nets *net)
6918 struct sctp_tmit_chunk *tp1;
6920 for (i = 0; i < bundle_at; i++) {
6921 /* off of the send queue */
6922 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6923 asoc->send_queue_cnt--;
6926 * Any chunk NOT 0 you zap the time chunk 0 gets
6927 * zapped or set based on if a RTO measurment is
6930 data_list[i]->do_rtt = 0;
6933 data_list[i]->sent_rcv_time = net->last_sent_time;
6934 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6935 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6936 if (data_list[i]->whoTo == NULL) {
6937 data_list[i]->whoTo = net;
6938 atomic_add_int(&net->ref_count, 1);
6940 /* on to the sent queue */
6941 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6942 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6943 struct sctp_tmit_chunk *tpp;
6945 /* need to move back */
6947 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6949 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6953 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6956 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6958 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6963 /* This does not lower until the cum-ack passes it */
6964 asoc->sent_queue_cnt++;
6965 if ((asoc->peers_rwnd <= 0) &&
6966 (asoc->total_flight == 0) &&
6968 /* Mark the chunk as being a window probe */
6969 SCTP_STAT_INCR(sctps_windowprobed);
6971 #ifdef SCTP_AUDITING_ENABLED
6972 sctp_audit_log(0xC2, 3);
6974 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6975 data_list[i]->snd_count = 1;
6976 data_list[i]->rec.data.chunk_was_revoked = 0;
6977 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6978 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6979 data_list[i]->whoTo->flight_size,
6980 data_list[i]->book_size,
6981 (uint32_t)(uintptr_t)data_list[i]->whoTo,
6982 data_list[i]->rec.data.tsn);
6984 sctp_flight_size_increase(data_list[i]);
6985 sctp_total_flight_increase(stcb, data_list[i]);
6986 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6987 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6988 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6990 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6991 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6992 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6993 /* SWS sender side engages */
6994 asoc->peers_rwnd = 0;
6997 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6998 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7003 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked)
7005 struct sctp_tmit_chunk *chk, *nchk;
7007 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7008 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7009 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7010 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7011 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7012 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7013 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7014 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7015 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7016 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7017 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7018 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7019 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7020 /* Stray chunks must be cleaned up */
7022 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7023 asoc->ctrl_queue_cnt--;
7025 sctp_m_freem(chk->data);
7028 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7029 asoc->fwd_tsn_cnt--;
7031 sctp_free_a_chunk(stcb, chk, so_locked);
7032 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7033 /* special handling, we must look into the param */
7034 if (chk != asoc->str_reset) {
7035 goto clean_up_anyway;
7042 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7043 uint32_t space_left, uint32_t frag_point, int eeor_on)
7046 * Make a decision on if I should split a msg into multiple parts.
7047 * This is only asked of incomplete messages.
7051 * If we are doing EEOR we need to always send it if its the
7052 * entire thing, since it might be all the guy is putting in
7055 if (space_left >= length) {
7057 * If we have data outstanding,
7058 * we get another chance when the sack
7059 * arrives to transmit - wait for more data
7061 if (stcb->asoc.total_flight == 0) {
7063 * If nothing is in flight, we zero the
7071 /* You can fill the rest */
7072 return (space_left);
7076 * For those strange folk that make the send buffer
7077 * smaller than our fragmentation point, we can't
7078 * get a full msg in so we have to allow splitting.
7080 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7083 if ((length <= space_left) ||
7084 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7085 /* Sub-optimial residual don't split in non-eeor mode. */
7089 * If we reach here length is larger than the space_left. Do we wish
7090 * to split it for the sake of packet putting together?
7092 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7093 /* Its ok to split it */
7094 return (min(space_left, frag_point));
7096 /* Nope, can't split */
7101 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7102 struct sctp_stream_out *strq,
7103 uint32_t space_left,
7104 uint32_t frag_point,
7110 /* Move from the stream to the send_queue keeping track of the total */
7111 struct sctp_association *asoc;
7112 struct sctp_stream_queue_pending *sp;
7113 struct sctp_tmit_chunk *chk;
7114 struct sctp_data_chunk *dchkh = NULL;
7115 struct sctp_idata_chunk *ndchkh = NULL;
7116 uint32_t to_move, length;
7118 uint8_t rcv_flags = 0;
7120 uint8_t send_lock_up = 0;
7122 SCTP_TCB_LOCK_ASSERT(stcb);
7125 /* sa_ignore FREED_MEMORY */
7126 sp = TAILQ_FIRST(&strq->outqueue);
7128 if (send_lock_up == 0) {
7129 SCTP_TCB_SEND_LOCK(stcb);
7132 sp = TAILQ_FIRST(&strq->outqueue);
7136 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7137 (stcb->asoc.idata_supported == 0) &&
7138 (strq->last_msg_incomplete)) {
7139 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7141 strq->last_msg_incomplete);
7142 strq->last_msg_incomplete = 0;
7146 SCTP_TCB_SEND_UNLOCK(stcb);
7151 if ((sp->msg_is_complete) && (sp->length == 0)) {
7152 if (sp->sender_all_done) {
7154 * We are doing deferred cleanup. Last time through
7155 * when we took all the data the sender_all_done was
7158 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7159 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7160 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7161 sp->sender_all_done,
7163 sp->msg_is_complete,
7167 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7168 SCTP_TCB_SEND_LOCK(stcb);
7171 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7172 TAILQ_REMOVE(&strq->outqueue, sp, next);
7173 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7174 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7175 (strq->chunks_on_queues == 0) &&
7176 TAILQ_EMPTY(&strq->outqueue)) {
7177 stcb->asoc.trigger_reset = 1;
7180 sctp_free_remote_addr(sp->net);
7184 sctp_m_freem(sp->data);
7187 sctp_free_a_strmoq(stcb, sp, so_locked);
7188 /* we can't be locked to it */
7190 SCTP_TCB_SEND_UNLOCK(stcb);
7193 /* back to get the next msg */
7197 * sender just finished this but still holds a
7205 /* is there some to get */
7206 if (sp->length == 0) {
7211 } else if (sp->discard_rest) {
7212 if (send_lock_up == 0) {
7213 SCTP_TCB_SEND_LOCK(stcb);
7216 /* Whack down the size */
7217 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7218 if ((stcb->sctp_socket != NULL) &&
7219 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7220 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7221 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7224 sctp_m_freem(sp->data);
7226 sp->tail_mbuf = NULL;
7235 some_taken = sp->some_taken;
7237 length = sp->length;
7238 if (sp->msg_is_complete) {
7239 /* The message is complete */
7240 to_move = min(length, frag_point);
7241 if (to_move == length) {
7242 /* All of it fits in the MTU */
7243 if (sp->some_taken) {
7244 rcv_flags |= SCTP_DATA_LAST_FRAG;
7246 rcv_flags |= SCTP_DATA_NOT_FRAG;
7248 sp->put_last_out = 1;
7249 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7250 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7253 /* Not all of it fits, we fragment */
7254 if (sp->some_taken == 0) {
7255 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7260 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7263 * We use a snapshot of length in case it
7264 * is expanding during the compare.
7269 if (to_move >= llen) {
7271 if (send_lock_up == 0) {
7273 * We are taking all of an incomplete msg
7274 * thus we need a send lock.
7276 SCTP_TCB_SEND_LOCK(stcb);
7278 if (sp->msg_is_complete) {
7280 * the sender finished the
7287 if (sp->some_taken == 0) {
7288 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7292 /* Nothing to take. */
7299 /* If we reach here, we can copy out a chunk */
7300 sctp_alloc_a_chunk(stcb, chk);
7302 /* No chunk memory */
7308 * Setup for unordered if needed by looking at the user sent info
7311 if (sp->sinfo_flags & SCTP_UNORDERED) {
7312 rcv_flags |= SCTP_DATA_UNORDERED;
7314 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7315 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7316 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7318 /* clear out the chunk before setting up */
7319 memset(chk, 0, sizeof(*chk));
7320 chk->rec.data.rcv_flags = rcv_flags;
7322 if (to_move >= length) {
7323 /* we think we can steal the whole thing */
7324 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7325 SCTP_TCB_SEND_LOCK(stcb);
7328 if (to_move < sp->length) {
7329 /* bail, it changed */
7332 chk->data = sp->data;
7333 chk->last_mbuf = sp->tail_mbuf;
7334 /* register the stealing */
7335 sp->data = sp->tail_mbuf = NULL;
7340 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7341 chk->last_mbuf = NULL;
7342 if (chk->data == NULL) {
7343 sp->some_taken = some_taken;
7344 sctp_free_a_chunk(stcb, chk, so_locked);
7349 #ifdef SCTP_MBUF_LOGGING
7350 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7351 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7354 /* Pull off the data */
7355 m_adj(sp->data, to_move);
7356 /* Now lets work our way down and compact it */
7358 while (m && (SCTP_BUF_LEN(m) == 0)) {
7359 sp->data = SCTP_BUF_NEXT(m);
7360 SCTP_BUF_NEXT(m) = NULL;
7361 if (sp->tail_mbuf == m) {
7363 * Freeing tail? TSNH since
7364 * we supposedly were taking less
7365 * than the sp->length.
7368 panic("Huh, freing tail? - TSNH");
7370 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7371 sp->tail_mbuf = sp->data = NULL;
7379 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7380 chk->copy_by_ref = 1;
7382 chk->copy_by_ref = 0;
7385 * get last_mbuf and counts of mb usage This is ugly but hopefully
7386 * its only one mbuf.
7388 if (chk->last_mbuf == NULL) {
7389 chk->last_mbuf = chk->data;
7390 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7391 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7395 if (to_move > length) {
7396 /*- This should not happen either
7397 * since we always lower to_move to the size
7398 * of sp->length if its larger.
7401 panic("Huh, how can to_move be larger?");
7403 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7407 atomic_subtract_int(&sp->length, to_move);
7409 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7410 if (M_LEADINGSPACE(chk->data) < leading) {
7411 /* Not enough room for a chunk header, get some */
7414 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7417 * we're in trouble here. _PREPEND below will free
7418 * all the data if there is no leading space, so we
7419 * must put the data back and restore.
7421 if (send_lock_up == 0) {
7422 SCTP_TCB_SEND_LOCK(stcb);
7425 if (sp->data == NULL) {
7426 /* unsteal the data */
7427 sp->data = chk->data;
7428 sp->tail_mbuf = chk->last_mbuf;
7432 /* reassemble the data */
7434 sp->data = chk->data;
7435 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7437 sp->some_taken = some_taken;
7438 atomic_add_int(&sp->length, to_move);
7441 sctp_free_a_chunk(stcb, chk, so_locked);
7445 SCTP_BUF_LEN(m) = 0;
7446 SCTP_BUF_NEXT(m) = chk->data;
7448 M_ALIGN(chk->data, 4);
7451 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7452 if (chk->data == NULL) {
7453 /* HELP, TSNH since we assured it would not above? */
7455 panic("prepend failes HELP?");
7457 SCTP_PRINTF("prepend fails HELP?\n");
7458 sctp_free_a_chunk(stcb, chk, so_locked);
7464 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7465 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7466 chk->book_size_scale = 0;
7467 chk->sent = SCTP_DATAGRAM_UNSENT;
7470 chk->asoc = &stcb->asoc;
7471 chk->pad_inplace = 0;
7472 chk->no_fr_allowed = 0;
7473 if (stcb->asoc.idata_supported == 0) {
7474 if (rcv_flags & SCTP_DATA_UNORDERED) {
7475 /* Just use 0. The receiver ignores the values. */
7476 chk->rec.data.mid = 0;
7478 chk->rec.data.mid = strq->next_mid_ordered;
7479 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7480 strq->next_mid_ordered++;
7484 if (rcv_flags & SCTP_DATA_UNORDERED) {
7485 chk->rec.data.mid = strq->next_mid_unordered;
7486 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7487 strq->next_mid_unordered++;
7490 chk->rec.data.mid = strq->next_mid_ordered;
7491 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7492 strq->next_mid_ordered++;
7496 chk->rec.data.sid = sp->sid;
7497 chk->rec.data.ppid = sp->ppid;
7498 chk->rec.data.context = sp->context;
7499 chk->rec.data.doing_fast_retransmit = 0;
7501 chk->rec.data.timetodrop = sp->ts;
7502 chk->flags = sp->act_flags;
7505 chk->whoTo = sp->net;
7506 atomic_add_int(&chk->whoTo->ref_count, 1);
7510 if (sp->holds_key_ref) {
7511 chk->auth_keyid = sp->auth_keyid;
7512 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7513 chk->holds_key_ref = 1;
7515 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7516 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7517 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7518 (uint32_t)(uintptr_t)stcb, sp->length,
7519 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7522 if (stcb->asoc.idata_supported == 0) {
7523 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7525 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7528 * Put the rest of the things in place now. Size was done earlier in
7529 * previous loop prior to padding.
7532 #ifdef SCTP_ASOCLOG_OF_TSNS
7533 SCTP_TCB_LOCK_ASSERT(stcb);
7534 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7535 asoc->tsn_out_at = 0;
7536 asoc->tsn_out_wrapped = 1;
7538 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7539 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7540 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7541 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7542 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7543 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7544 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7545 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7548 if (stcb->asoc.idata_supported == 0) {
7549 dchkh->ch.chunk_type = SCTP_DATA;
7550 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7551 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7552 dchkh->dp.sid = htons(strq->sid);
7553 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7554 dchkh->dp.ppid = chk->rec.data.ppid;
7555 dchkh->ch.chunk_length = htons(chk->send_size);
7557 ndchkh->ch.chunk_type = SCTP_IDATA;
7558 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7559 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7560 ndchkh->dp.sid = htons(strq->sid);
7561 ndchkh->dp.reserved = htons(0);
7562 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7564 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7566 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7568 ndchkh->ch.chunk_length = htons(chk->send_size);
7570 /* Now advance the chk->send_size by the actual pad needed. */
7571 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7576 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7577 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7579 chk->last_mbuf = lm;
7580 chk->pad_inplace = 1;
7582 chk->send_size += pads;
7584 if (PR_SCTP_ENABLED(chk->flags)) {
7585 asoc->pr_sctp_cnt++;
7587 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7588 /* All done pull and kill the message */
7589 if (sp->put_last_out == 0) {
7590 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7591 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7592 sp->sender_all_done,
7594 sp->msg_is_complete,
7598 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7599 SCTP_TCB_SEND_LOCK(stcb);
7602 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7603 TAILQ_REMOVE(&strq->outqueue, sp, next);
7604 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7605 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7606 (strq->chunks_on_queues == 0) &&
7607 TAILQ_EMPTY(&strq->outqueue)) {
7608 stcb->asoc.trigger_reset = 1;
7611 sctp_free_remote_addr(sp->net);
7615 sctp_m_freem(sp->data);
7618 sctp_free_a_strmoq(stcb, sp, so_locked);
7620 asoc->chunks_on_out_queue++;
7621 strq->chunks_on_queues++;
7622 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7623 asoc->send_queue_cnt++;
7626 SCTP_TCB_SEND_UNLOCK(stcb);
7632 sctp_fill_outqueue(struct sctp_tcb *stcb,
7633 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked)
7635 struct sctp_association *asoc;
7636 struct sctp_stream_out *strq;
7637 uint32_t space_left, moved, total_moved;
7640 SCTP_TCB_LOCK_ASSERT(stcb);
7643 switch (net->ro._l_addr.sa.sa_family) {
7646 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7651 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7656 space_left = net->mtu;
7659 /* Need an allowance for the data chunk header too */
7660 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7662 /* must make even word boundary */
7663 space_left &= 0xfffffffc;
7664 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7667 while ((space_left > 0) && (strq != NULL)) {
7668 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7669 &giveup, eeor_mode, &bail, so_locked);
7670 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7671 if ((giveup != 0) || (bail != 0)) {
7674 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7675 total_moved += moved;
7676 if (space_left >= moved) {
7677 space_left -= moved;
7681 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7682 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7686 space_left &= 0xfffffffc;
7691 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7693 if (total_moved == 0) {
7694 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7695 (net == stcb->asoc.primary_destination)) {
7696 /* ran dry for primary network net */
7697 SCTP_STAT_INCR(sctps_primary_randry);
7698 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7699 /* ran dry with CMT on */
7700 SCTP_STAT_INCR(sctps_cmt_randry);
7706 sctp_fix_ecn_echo(struct sctp_association *asoc)
7708 struct sctp_tmit_chunk *chk;
7710 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7711 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7712 chk->sent = SCTP_DATAGRAM_UNSENT;
7718 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7720 struct sctp_association *asoc;
7721 struct sctp_tmit_chunk *chk;
7722 struct sctp_stream_queue_pending *sp;
7729 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7730 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7731 if (sp->net == net) {
7732 sctp_free_remote_addr(sp->net);
7737 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7738 if (chk->whoTo == net) {
7739 sctp_free_remote_addr(chk->whoTo);
7746 sctp_med_chunk_output(struct sctp_inpcb *inp,
7747 struct sctp_tcb *stcb,
7748 struct sctp_association *asoc,
7751 int control_only, int from_where,
7752 struct timeval *now, int *now_filled, int frag_point, int so_locked)
7755 * Ok this is the generic chunk service queue. we must do the
7757 * - Service the stream queue that is next, moving any
7758 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7759 * LAST to the out queue in one pass) and assigning TSN's. This
7760 * only applys though if the peer does not support NDATA. For NDATA
7761 * chunks its ok to not send the entire message ;-)
7762 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7763 * fomulate and send the low level chunks. Making sure to combine
7764 * any control in the control chunk queue also.
7766 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7767 struct mbuf *outchain, *endoutchain;
7768 struct sctp_tmit_chunk *chk, *nchk;
7770 /* temp arrays for unlinking */
7771 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7772 int no_fragmentflg, error;
7773 unsigned int max_rwnd_per_dest, max_send_per_dest;
7774 int one_chunk, hbflag, skip_data_for_this_net;
7775 int asconf, cookie, no_out_cnt;
7776 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7777 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7779 uint32_t auth_offset;
7780 struct sctp_auth_chunk *auth;
7781 uint16_t auth_keyid;
7782 int override_ok = 1;
7783 int skip_fill_up = 0;
7784 int data_auth_reqd = 0;
7787 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7794 auth_keyid = stcb->asoc.authinfo.active_keyid;
7795 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7796 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
7797 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7802 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7804 * First lets prime the pump. For each destination, if there is room
7805 * in the flight size, attempt to pull an MTU's worth out of the
7806 * stream queues into the general send_queue
7808 #ifdef SCTP_AUDITING_ENABLED
7809 sctp_audit_log(0xC2, 2);
7811 SCTP_TCB_LOCK_ASSERT(stcb);
7818 /* Nothing to possible to send? */
7819 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7820 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7821 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7822 TAILQ_EMPTY(&asoc->send_queue) &&
7823 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7828 if (asoc->peers_rwnd == 0) {
7829 /* No room in peers rwnd */
7831 if (asoc->total_flight > 0) {
7832 /* we are allowed one chunk in flight */
7836 if (stcb->asoc.ecn_echo_cnt_onq) {
7837 /* Record where a sack goes, if any */
7838 if (no_data_chunks &&
7839 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7840 /* Nothing but ECNe to send - we don't do that */
7841 goto nothing_to_send;
7843 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7844 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7845 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7846 sack_goes_to = chk->whoTo;
7851 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7852 if (stcb->sctp_socket)
7853 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7855 max_send_per_dest = 0;
7856 if (no_data_chunks == 0) {
7857 /* How many non-directed chunks are there? */
7858 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7859 if (chk->whoTo == NULL) {
7861 * We already have non-directed chunks on
7862 * the queue, no need to do a fill-up.
7869 if ((no_data_chunks == 0) &&
7870 (skip_fill_up == 0) &&
7871 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7872 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7874 * This for loop we are in takes in each net, if
7875 * its's got space in cwnd and has data sent to it
7876 * (when CMT is off) then it calls
7877 * sctp_fill_outqueue for the net. This gets data on
7878 * the send queue for that network.
7880 * In sctp_fill_outqueue TSN's are assigned and data
7881 * is copied out of the stream buffers. Note mostly
7882 * copy by reference (we hope).
7884 net->window_probe = 0;
7885 if ((net != stcb->asoc.alternate) &&
7886 ((net->dest_state & SCTP_ADDR_PF) ||
7887 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7888 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7889 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7890 sctp_log_cwnd(stcb, net, 1,
7891 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7895 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7896 (net->flight_size == 0)) {
7897 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7899 if (net->flight_size >= net->cwnd) {
7900 /* skip this network, no room - can't fill */
7901 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7902 sctp_log_cwnd(stcb, net, 3,
7903 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7907 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7908 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7910 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7912 /* memory alloc failure */
7918 /* now service each destination and send out what we can for it */
7919 /* Nothing to send? */
7920 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7921 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7922 TAILQ_EMPTY(&asoc->send_queue)) {
7927 if (asoc->sctp_cmt_on_off > 0) {
7928 /* get the last start point */
7929 start_at = asoc->last_net_cmt_send_started;
7930 if (start_at == NULL) {
7931 /* null so to beginning */
7932 start_at = TAILQ_FIRST(&asoc->nets);
7934 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7935 if (start_at == NULL) {
7936 start_at = TAILQ_FIRST(&asoc->nets);
7939 asoc->last_net_cmt_send_started = start_at;
7941 start_at = TAILQ_FIRST(&asoc->nets);
7943 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7944 if (chk->whoTo == NULL) {
7945 if (asoc->alternate) {
7946 chk->whoTo = asoc->alternate;
7948 chk->whoTo = asoc->primary_destination;
7950 atomic_add_int(&chk->whoTo->ref_count, 1);
7953 old_start_at = NULL;
7954 again_one_more_time:
7955 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7956 /* how much can we send? */
7957 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7958 if (old_start_at && (old_start_at == net)) {
7959 /* through list ocmpletely. */
7963 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7964 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7965 (net->flight_size >= net->cwnd)) {
7967 * Nothing on control or asconf and flight is full,
7968 * we can skip even in the CMT case.
7973 endoutchain = outchain = NULL;
7978 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7979 skip_data_for_this_net = 1;
7981 skip_data_for_this_net = 0;
7983 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7986 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7991 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8001 if (mtu > asoc->peers_rwnd) {
8002 if (asoc->total_flight > 0) {
8003 /* We have a packet in flight somewhere */
8004 r_mtu = asoc->peers_rwnd;
8006 /* We are always allowed to send one MTU out */
8014 /************************/
8015 /* ASCONF transmission */
8016 /************************/
8017 /* Now first lets go through the asconf queue */
8018 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8019 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8022 if (chk->whoTo == NULL) {
8023 if (asoc->alternate == NULL) {
8024 if (asoc->primary_destination != net) {
8028 if (asoc->alternate != net) {
8033 if (chk->whoTo != net) {
8037 if (chk->data == NULL) {
8040 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8041 chk->sent != SCTP_DATAGRAM_RESEND) {
8045 * if no AUTH is yet included and this chunk
8046 * requires it, make sure to account for it. We
8047 * don't apply the size until the AUTH chunk is
8048 * actually added below in case there is no room for
8049 * this chunk. NOTE: we overload the use of "omtu"
8052 if ((auth == NULL) &&
8053 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8054 stcb->asoc.peer_auth_chunks)) {
8055 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8058 /* Here we do NOT factor the r_mtu */
8059 if ((chk->send_size < (int)(mtu - omtu)) ||
8060 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8062 * We probably should glom the mbuf chain
8063 * from the chk->data for control but the
8064 * problem is it becomes yet one more level
8065 * of tracking to do if for some reason
8066 * output fails. Then I have got to
8067 * reconstruct the merged control chain.. el
8068 * yucko.. for now we take the easy way and
8072 * Add an AUTH chunk, if chunk requires it
8073 * save the offset into the chain for AUTH
8075 if ((auth == NULL) &&
8076 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8077 stcb->asoc.peer_auth_chunks))) {
8078 outchain = sctp_add_auth_chunk(outchain,
8083 chk->rec.chunk_id.id);
8084 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8086 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8087 (int)chk->rec.chunk_id.can_take_data,
8088 chk->send_size, chk->copy_by_ref);
8089 if (outchain == NULL) {
8091 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8094 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8095 /* update our MTU size */
8096 if (mtu > (chk->send_size + omtu))
8097 mtu -= (chk->send_size + omtu);
8100 to_out += (chk->send_size + omtu);
8101 /* Do clear IP_DF ? */
8102 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8105 if (chk->rec.chunk_id.can_take_data)
8108 * set hb flag since we can use these for
8114 * should sysctl this: don't bundle data
8115 * with ASCONF since it requires AUTH
8118 chk->sent = SCTP_DATAGRAM_SENT;
8119 if (chk->whoTo == NULL) {
8121 atomic_add_int(&net->ref_count, 1);
8126 * Ok we are out of room but we can
8127 * output without effecting the
8128 * flight size since this little guy
8129 * is a control only packet.
8131 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8133 * do NOT clear the asconf flag as
8134 * it is used to do appropriate
8135 * source address selection.
8137 if (*now_filled == 0) {
8138 (void)SCTP_GETTIME_TIMEVAL(now);
8141 net->last_sent_time = *now;
8143 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8144 (struct sockaddr *)&net->ro._l_addr,
8145 outchain, auth_offset, auth,
8146 stcb->asoc.authinfo.active_keyid,
8147 no_fragmentflg, 0, asconf,
8148 inp->sctp_lport, stcb->rport,
8149 htonl(stcb->asoc.peer_vtag),
8154 * error, we could not
8157 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8158 if (from_where == 0) {
8159 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8161 if (error == ENOBUFS) {
8162 asoc->ifp_had_enobuf = 1;
8163 SCTP_STAT_INCR(sctps_lowlevelerr);
8165 /* error, could not output */
8166 if (error == EHOSTUNREACH) {
8172 sctp_move_chunks_from_net(stcb, net);
8177 asoc->ifp_had_enobuf = 0;
8180 * increase the number we sent, if a
8181 * cookie is sent we don't tell them
8184 outchain = endoutchain = NULL;
8188 *num_out += ctl_cnt;
8189 /* recalc a clean slate and setup */
8190 switch (net->ro._l_addr.sa.sa_family) {
8193 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8198 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8215 /************************/
8216 /* Control transmission */
8217 /************************/
8218 /* Now first lets go through the control queue */
8219 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8220 if ((sack_goes_to) &&
8221 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8222 (chk->whoTo != sack_goes_to)) {
8224 * if we have a sack in queue, and we are
8225 * looking at an ecn echo that is NOT queued
8226 * to where the sack is going..
8228 if (chk->whoTo == net) {
8230 * Don't transmit it to where its
8231 * going (current net)
8234 } else if (sack_goes_to == net) {
8236 * But do transmit it to this
8239 goto skip_net_check;
8242 if (chk->whoTo == NULL) {
8243 if (asoc->alternate == NULL) {
8244 if (asoc->primary_destination != net) {
8248 if (asoc->alternate != net) {
8253 if (chk->whoTo != net) {
8258 if (chk->data == NULL) {
8261 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8263 * It must be unsent. Cookies and ASCONF's
8264 * hang around but there timers will force
8265 * when marked for resend.
8270 * if no AUTH is yet included and this chunk
8271 * requires it, make sure to account for it. We
8272 * don't apply the size until the AUTH chunk is
8273 * actually added below in case there is no room for
8274 * this chunk. NOTE: we overload the use of "omtu"
8277 if ((auth == NULL) &&
8278 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8279 stcb->asoc.peer_auth_chunks)) {
8280 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8283 /* Here we do NOT factor the r_mtu */
8284 if ((chk->send_size <= (int)(mtu - omtu)) ||
8285 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8287 * We probably should glom the mbuf chain
8288 * from the chk->data for control but the
8289 * problem is it becomes yet one more level
8290 * of tracking to do if for some reason
8291 * output fails. Then I have got to
8292 * reconstruct the merged control chain.. el
8293 * yucko.. for now we take the easy way and
8297 * Add an AUTH chunk, if chunk requires it
8298 * save the offset into the chain for AUTH
8300 if ((auth == NULL) &&
8301 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8302 stcb->asoc.peer_auth_chunks))) {
8303 outchain = sctp_add_auth_chunk(outchain,
8308 chk->rec.chunk_id.id);
8309 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8311 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8312 (int)chk->rec.chunk_id.can_take_data,
8313 chk->send_size, chk->copy_by_ref);
8314 if (outchain == NULL) {
8316 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8319 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8320 /* update our MTU size */
8321 if (mtu > (chk->send_size + omtu))
8322 mtu -= (chk->send_size + omtu);
8325 to_out += (chk->send_size + omtu);
8326 /* Do clear IP_DF ? */
8327 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8330 if (chk->rec.chunk_id.can_take_data)
8332 /* Mark things to be removed, if needed */
8333 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8334 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8335 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8336 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8337 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8338 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8339 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8340 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8341 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8342 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8343 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8344 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8347 /* remove these chunks at the end */
8348 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8349 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8350 /* turn off the timer */
8351 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8352 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8354 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8360 * Other chunks, since they have
8361 * timers running (i.e. COOKIE) we
8362 * just "trust" that it gets sent or
8366 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8369 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8371 * Increment ecne send count
8372 * here this means we may be
8373 * over-zealous in our
8374 * counting if the send
8375 * fails, but its the best
8376 * place to do it (we used
8377 * to do it in the queue of
8378 * the chunk, but that did
8379 * not tell how many times
8382 SCTP_STAT_INCR(sctps_sendecne);
8384 chk->sent = SCTP_DATAGRAM_SENT;
8385 if (chk->whoTo == NULL) {
8387 atomic_add_int(&net->ref_count, 1);
8393 * Ok we are out of room but we can
8394 * output without effecting the
8395 * flight size since this little guy
8396 * is a control only packet.
8399 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8401 * do NOT clear the asconf
8402 * flag as it is used to do
8403 * appropriate source
8404 * address selection.
8408 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8411 /* Only HB or ASCONF advances time */
8413 if (*now_filled == 0) {
8414 (void)SCTP_GETTIME_TIMEVAL(now);
8417 net->last_sent_time = *now;
8420 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8421 (struct sockaddr *)&net->ro._l_addr,
8424 stcb->asoc.authinfo.active_keyid,
8425 no_fragmentflg, 0, asconf,
8426 inp->sctp_lport, stcb->rport,
8427 htonl(stcb->asoc.peer_vtag),
8432 * error, we could not
8435 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8436 if (from_where == 0) {
8437 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8439 if (error == ENOBUFS) {
8440 asoc->ifp_had_enobuf = 1;
8441 SCTP_STAT_INCR(sctps_lowlevelerr);
8443 if (error == EHOSTUNREACH) {
8449 sctp_move_chunks_from_net(stcb, net);
8454 asoc->ifp_had_enobuf = 0;
8457 * increase the number we sent, if a
8458 * cookie is sent we don't tell them
8461 outchain = endoutchain = NULL;
8465 *num_out += ctl_cnt;
8466 /* recalc a clean slate and setup */
8467 switch (net->ro._l_addr.sa.sa_family) {
8470 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8475 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8492 /* JRI: if dest is in PF state, do not send data to it */
8493 if ((asoc->sctp_cmt_on_off > 0) &&
8494 (net != stcb->asoc.alternate) &&
8495 (net->dest_state & SCTP_ADDR_PF)) {
8498 if (net->flight_size >= net->cwnd) {
8501 if ((asoc->sctp_cmt_on_off > 0) &&
8502 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8503 (net->flight_size > max_rwnd_per_dest)) {
8507 * We need a specific accounting for the usage of the send
8508 * buffer. We also need to check the number of messages per
8509 * net. For now, this is better than nothing and it disabled
8512 if ((asoc->sctp_cmt_on_off > 0) &&
8513 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8514 (max_send_per_dest > 0) &&
8515 (net->flight_size > max_send_per_dest)) {
8518 /*********************/
8519 /* Data transmission */
8520 /*********************/
8522 * if AUTH for DATA is required and no AUTH has been added
8523 * yet, account for this in the mtu now... if no data can be
8524 * bundled, this adjustment won't matter anyways since the
8525 * packet will be going out...
8527 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8528 stcb->asoc.peer_auth_chunks);
8529 if (data_auth_reqd && (auth == NULL)) {
8530 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8532 /* now lets add any data within the MTU constraints */
8533 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8536 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8537 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8544 if (net->mtu > SCTP_MIN_OVERHEAD)
8545 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8555 if ((((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) ||
8556 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8557 (skip_data_for_this_net == 0)) ||
8559 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8560 if (no_data_chunks) {
8561 /* let only control go out */
8565 if (net->flight_size >= net->cwnd) {
8566 /* skip this net, no room for data */
8570 if ((chk->whoTo != NULL) &&
8571 (chk->whoTo != net)) {
8572 /* Don't send the chunk on this net */
8576 if (asoc->sctp_cmt_on_off == 0) {
8577 if ((asoc->alternate) &&
8578 (asoc->alternate != net) &&
8579 (chk->whoTo == NULL)) {
8581 } else if ((net != asoc->primary_destination) &&
8582 (asoc->alternate == NULL) &&
8583 (chk->whoTo == NULL)) {
8587 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8589 * strange, we have a chunk that is
8590 * to big for its destination and
8591 * yet no fragment ok flag.
8592 * Something went wrong when the
8593 * PMTU changed...we did not mark
8594 * this chunk for some reason?? I
8595 * will fix it here by letting IP
8596 * fragment it for now and printing
8597 * a warning. This really should not
8600 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8601 chk->send_size, mtu);
8602 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8604 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8605 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
8606 struct sctp_data_chunk *dchkh;
8608 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8609 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8611 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8612 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8613 /* ok we will add this one */
8616 * Add an AUTH chunk, if chunk
8617 * requires it, save the offset into
8618 * the chain for AUTH
8620 if (data_auth_reqd) {
8622 outchain = sctp_add_auth_chunk(outchain,
8628 auth_keyid = chk->auth_keyid;
8630 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8631 } else if (override_ok) {
8636 auth_keyid = chk->auth_keyid;
8638 } else if (auth_keyid != chk->auth_keyid) {
8646 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8647 chk->send_size, chk->copy_by_ref);
8648 if (outchain == NULL) {
8649 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8650 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8651 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8654 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8657 /* upate our MTU size */
8658 /* Do clear IP_DF ? */
8659 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8662 /* unsigned subtraction of mtu */
8663 if (mtu > chk->send_size)
8664 mtu -= chk->send_size;
8667 /* unsigned subtraction of r_mtu */
8668 if (r_mtu > chk->send_size)
8669 r_mtu -= chk->send_size;
8673 to_out += chk->send_size;
8674 if ((to_out > mx_mtu) && no_fragmentflg) {
8676 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8678 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8682 chk->window_probe = 0;
8683 data_list[bundle_at++] = chk;
8684 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8687 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8688 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8689 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8691 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8693 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8694 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8704 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8706 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8707 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8708 data_list[0]->window_probe = 1;
8709 net->window_probe = 1;
8715 * Must be sent in order of the
8716 * TSN's (on a network)
8720 } /* for (chunk gather loop for this net) */
8721 } /* if asoc.state OPEN */
8723 /* Is there something to send for this destination? */
8725 /* We may need to start a control timer or two */
8727 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8730 * do NOT clear the asconf flag as it is
8731 * used to do appropriate source address
8736 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8739 /* must start a send timer if data is being sent */
8740 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8742 * no timer running on this destination
8745 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8747 if (bundle_at || hbflag) {
8748 /* For data/asconf and hb set time */
8749 if (*now_filled == 0) {
8750 (void)SCTP_GETTIME_TIMEVAL(now);
8753 net->last_sent_time = *now;
8755 /* Now send it, if there is anything to send :> */
8756 if ((error = sctp_lowlevel_chunk_output(inp,
8759 (struct sockaddr *)&net->ro._l_addr,
8767 inp->sctp_lport, stcb->rport,
8768 htonl(stcb->asoc.peer_vtag),
8772 /* error, we could not output */
8773 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8774 if (from_where == 0) {
8775 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8777 if (error == ENOBUFS) {
8778 asoc->ifp_had_enobuf = 1;
8779 SCTP_STAT_INCR(sctps_lowlevelerr);
8781 if (error == EHOSTUNREACH) {
8783 * Destination went unreachable
8786 sctp_move_chunks_from_net(stcb, net);
8790 * I add this line to be paranoid. As far as
8791 * I can tell the continue, takes us back to
8792 * the top of the for, but just to make sure
8793 * I will reset these again here.
8796 continue; /* This takes us back to the
8797 * for() for the nets. */
8799 asoc->ifp_had_enobuf = 0;
8805 *num_out += (ctl_cnt + bundle_at);
8808 /* setup for a RTO measurement */
8809 tsns_sent = data_list[0]->rec.data.tsn;
8810 /* fill time if not already filled */
8811 if (*now_filled == 0) {
8812 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8814 *now = asoc->time_last_sent;
8816 asoc->time_last_sent = *now;
8818 if (net->rto_needed) {
8819 data_list[0]->do_rtt = 1;
8820 net->rto_needed = 0;
8822 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8823 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8829 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8830 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8833 if (old_start_at == NULL) {
8834 old_start_at = start_at;
8835 start_at = TAILQ_FIRST(&asoc->nets);
8837 goto again_one_more_time;
8841 * At the end there should be no NON timed chunks hanging on this
8844 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8845 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8847 if ((*num_out == 0) && (*reason_code == 0)) {
8852 sctp_clean_up_ctl(stcb, asoc, so_locked);
8857 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8860 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8861 * the control chunk queue.
8863 struct sctp_chunkhdr *hdr;
8864 struct sctp_tmit_chunk *chk;
8865 struct mbuf *mat, *last_mbuf;
8866 uint32_t chunk_length;
8867 uint16_t padding_length;
8869 SCTP_TCB_LOCK_ASSERT(stcb);
8870 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8871 if (op_err == NULL) {
8876 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8877 chunk_length += SCTP_BUF_LEN(mat);
8878 if (SCTP_BUF_NEXT(mat) == NULL) {
8882 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8883 sctp_m_freem(op_err);
8886 padding_length = chunk_length % 4;
8887 if (padding_length != 0) {
8888 padding_length = 4 - padding_length;
8890 if (padding_length != 0) {
8891 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8892 sctp_m_freem(op_err);
8896 sctp_alloc_a_chunk(stcb, chk);
8899 sctp_m_freem(op_err);
8902 chk->copy_by_ref = 0;
8903 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8904 chk->rec.chunk_id.can_take_data = 0;
8906 chk->send_size = (uint16_t)chunk_length;
8907 chk->sent = SCTP_DATAGRAM_UNSENT;
8909 chk->asoc = &stcb->asoc;
8912 hdr = mtod(op_err, struct sctp_chunkhdr *);
8913 hdr->chunk_type = SCTP_OPERATION_ERROR;
8914 hdr->chunk_flags = 0;
8915 hdr->chunk_length = htons(chk->send_size);
8916 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8917 chk->asoc->ctrl_queue_cnt++;
8921 sctp_send_cookie_echo(struct mbuf *m,
8922 int offset, int limit,
8923 struct sctp_tcb *stcb,
8924 struct sctp_nets *net)
8927 * pull out the cookie and put it at the front of the control chunk
8931 struct mbuf *cookie;
8932 struct sctp_paramhdr param, *phdr;
8933 struct sctp_chunkhdr *hdr;
8934 struct sctp_tmit_chunk *chk;
8935 uint16_t ptype, plen;
8937 SCTP_TCB_LOCK_ASSERT(stcb);
8938 /* First find the cookie in the param area */
8940 at = offset + sizeof(struct sctp_init_chunk);
8942 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8946 ptype = ntohs(phdr->param_type);
8947 plen = ntohs(phdr->param_length);
8948 if (plen < sizeof(struct sctp_paramhdr)) {
8951 if (ptype == SCTP_STATE_COOKIE) {
8954 /* found the cookie */
8955 if (at + plen > limit) {
8958 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8959 if (cookie == NULL) {
8963 if ((pad = (plen % 4)) > 0) {
8967 if (sctp_pad_lastmbuf(cookie, pad, NULL) == NULL) {
8971 #ifdef SCTP_MBUF_LOGGING
8972 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8973 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
8978 at += SCTP_SIZE32(plen);
8980 /* ok, we got the cookie lets change it into a cookie echo chunk */
8981 /* first the change from param to cookie */
8982 hdr = mtod(cookie, struct sctp_chunkhdr *);
8983 hdr->chunk_type = SCTP_COOKIE_ECHO;
8984 hdr->chunk_flags = 0;
8985 /* get the chunk stuff now and place it in the FRONT of the queue */
8986 sctp_alloc_a_chunk(stcb, chk);
8989 sctp_m_freem(cookie);
8992 chk->copy_by_ref = 0;
8993 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8994 chk->rec.chunk_id.can_take_data = 0;
8995 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8996 chk->send_size = SCTP_SIZE32(plen);
8997 chk->sent = SCTP_DATAGRAM_UNSENT;
8999 chk->asoc = &stcb->asoc;
9002 atomic_add_int(&chk->whoTo->ref_count, 1);
9003 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9004 chk->asoc->ctrl_queue_cnt++;
9009 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9013 struct sctp_nets *net)
9016 * take a HB request and make it into a HB ack and send it.
9018 struct mbuf *outchain;
9019 struct sctp_chunkhdr *chdr;
9020 struct sctp_tmit_chunk *chk;
9023 /* must have a net pointer */
9026 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9027 if (outchain == NULL) {
9028 /* gak out of memory */
9031 #ifdef SCTP_MBUF_LOGGING
9032 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9033 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9036 chdr = mtod(outchain, struct sctp_chunkhdr *);
9037 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9038 chdr->chunk_flags = 0;
9039 if (chk_length % 4 != 0) {
9040 sctp_pad_lastmbuf(outchain, 4 - (chk_length % 4), NULL);
9042 sctp_alloc_a_chunk(stcb, chk);
9045 sctp_m_freem(outchain);
9048 chk->copy_by_ref = 0;
9049 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9050 chk->rec.chunk_id.can_take_data = 1;
9052 chk->send_size = chk_length;
9053 chk->sent = SCTP_DATAGRAM_UNSENT;
9055 chk->asoc = &stcb->asoc;
9056 chk->data = outchain;
9058 atomic_add_int(&chk->whoTo->ref_count, 1);
9059 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9060 chk->asoc->ctrl_queue_cnt++;
9064 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9066 /* formulate and queue a cookie-ack back to sender */
9067 struct mbuf *cookie_ack;
9068 struct sctp_chunkhdr *hdr;
9069 struct sctp_tmit_chunk *chk;
9071 SCTP_TCB_LOCK_ASSERT(stcb);
9073 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9074 if (cookie_ack == NULL) {
9078 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9079 sctp_alloc_a_chunk(stcb, chk);
9082 sctp_m_freem(cookie_ack);
9085 chk->copy_by_ref = 0;
9086 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9087 chk->rec.chunk_id.can_take_data = 1;
9089 chk->send_size = sizeof(struct sctp_chunkhdr);
9090 chk->sent = SCTP_DATAGRAM_UNSENT;
9092 chk->asoc = &stcb->asoc;
9093 chk->data = cookie_ack;
9094 if (chk->asoc->last_control_chunk_from != NULL) {
9095 chk->whoTo = chk->asoc->last_control_chunk_from;
9096 atomic_add_int(&chk->whoTo->ref_count, 1);
9100 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9101 hdr->chunk_type = SCTP_COOKIE_ACK;
9102 hdr->chunk_flags = 0;
9103 hdr->chunk_length = htons(chk->send_size);
9104 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9105 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9106 chk->asoc->ctrl_queue_cnt++;
9111 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9113 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9114 struct mbuf *m_shutdown_ack;
9115 struct sctp_shutdown_ack_chunk *ack_cp;
9116 struct sctp_tmit_chunk *chk;
9118 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9119 if (m_shutdown_ack == NULL) {
9123 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9124 sctp_alloc_a_chunk(stcb, chk);
9127 sctp_m_freem(m_shutdown_ack);
9130 chk->copy_by_ref = 0;
9131 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9132 chk->rec.chunk_id.can_take_data = 1;
9134 chk->send_size = sizeof(struct sctp_chunkhdr);
9135 chk->sent = SCTP_DATAGRAM_UNSENT;
9137 chk->asoc = &stcb->asoc;
9138 chk->data = m_shutdown_ack;
9141 atomic_add_int(&chk->whoTo->ref_count, 1);
9143 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9144 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9145 ack_cp->ch.chunk_flags = 0;
9146 ack_cp->ch.chunk_length = htons(chk->send_size);
9147 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9148 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9149 chk->asoc->ctrl_queue_cnt++;
9154 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9156 /* formulate and queue a SHUTDOWN to the sender */
9157 struct mbuf *m_shutdown;
9158 struct sctp_shutdown_chunk *shutdown_cp;
9159 struct sctp_tmit_chunk *chk;
9161 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9162 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9163 /* We already have a SHUTDOWN queued. Reuse it. */
9165 sctp_free_remote_addr(chk->whoTo);
9172 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9173 if (m_shutdown == NULL) {
9177 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9178 sctp_alloc_a_chunk(stcb, chk);
9181 sctp_m_freem(m_shutdown);
9184 chk->copy_by_ref = 0;
9185 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9186 chk->rec.chunk_id.can_take_data = 1;
9188 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9189 chk->sent = SCTP_DATAGRAM_UNSENT;
9191 chk->asoc = &stcb->asoc;
9192 chk->data = m_shutdown;
9195 atomic_add_int(&chk->whoTo->ref_count, 1);
9197 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9198 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9199 shutdown_cp->ch.chunk_flags = 0;
9200 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9201 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9202 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9203 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9204 chk->asoc->ctrl_queue_cnt++;
9206 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9209 atomic_add_int(&chk->whoTo->ref_count, 1);
9211 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9212 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9213 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9219 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9222 * formulate and queue an ASCONF to the peer. ASCONF parameters
9223 * should be queued on the assoc queue.
9225 struct sctp_tmit_chunk *chk;
9226 struct mbuf *m_asconf;
9229 SCTP_TCB_LOCK_ASSERT(stcb);
9231 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9232 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9233 /* can't send a new one if there is one in flight already */
9237 /* compose an ASCONF chunk, maximum length is PMTU */
9238 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9239 if (m_asconf == NULL) {
9243 sctp_alloc_a_chunk(stcb, chk);
9246 sctp_m_freem(m_asconf);
9250 chk->copy_by_ref = 0;
9251 chk->rec.chunk_id.id = SCTP_ASCONF;
9252 chk->rec.chunk_id.can_take_data = 0;
9253 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9254 chk->data = m_asconf;
9255 chk->send_size = len;
9256 chk->sent = SCTP_DATAGRAM_UNSENT;
9258 chk->asoc = &stcb->asoc;
9261 atomic_add_int(&chk->whoTo->ref_count, 1);
9263 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9264 chk->asoc->ctrl_queue_cnt++;
9269 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9272 * formulate and queue a asconf-ack back to sender. the asconf-ack
9273 * must be stored in the tcb.
9275 struct sctp_tmit_chunk *chk;
9276 struct sctp_asconf_ack *ack, *latest_ack;
9278 struct sctp_nets *net = NULL;
9280 SCTP_TCB_LOCK_ASSERT(stcb);
9281 /* Get the latest ASCONF-ACK */
9282 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9283 if (latest_ack == NULL) {
9286 if (latest_ack->last_sent_to != NULL &&
9287 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9288 /* we're doing a retransmission */
9289 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9292 if (stcb->asoc.last_control_chunk_from == NULL) {
9293 if (stcb->asoc.alternate) {
9294 net = stcb->asoc.alternate;
9296 net = stcb->asoc.primary_destination;
9299 net = stcb->asoc.last_control_chunk_from;
9304 if (stcb->asoc.last_control_chunk_from == NULL) {
9305 if (stcb->asoc.alternate) {
9306 net = stcb->asoc.alternate;
9308 net = stcb->asoc.primary_destination;
9311 net = stcb->asoc.last_control_chunk_from;
9314 latest_ack->last_sent_to = net;
9316 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9317 if (ack->data == NULL) {
9321 /* copy the asconf_ack */
9322 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9323 if (m_ack == NULL) {
9324 /* couldn't copy it */
9327 #ifdef SCTP_MBUF_LOGGING
9328 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9329 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9333 sctp_alloc_a_chunk(stcb, chk);
9337 sctp_m_freem(m_ack);
9340 chk->copy_by_ref = 0;
9341 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9342 chk->rec.chunk_id.can_take_data = 1;
9343 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9346 atomic_add_int(&chk->whoTo->ref_count, 1);
9349 chk->send_size = ack->len;
9350 chk->sent = SCTP_DATAGRAM_UNSENT;
9352 chk->asoc = &stcb->asoc;
9354 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9355 chk->asoc->ctrl_queue_cnt++;
9361 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9362 struct sctp_tcb *stcb,
9363 struct sctp_association *asoc,
9364 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked)
9367 * send out one MTU of retransmission. If fast_retransmit is
9368 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9369 * rwnd. For a Cookie or Asconf in the control chunk queue we
9370 * retransmit them by themselves.
9372 * For data chunks we will pick out the lowest TSN's in the sent_queue
9373 * marked for resend and bundle them all together (up to a MTU of
9374 * destination). The address to send to should have been
9375 * selected/changed where the retransmission was marked (i.e. in FR
9376 * or t3-timeout routines).
9378 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9379 struct sctp_tmit_chunk *chk, *fwd;
9380 struct mbuf *m, *endofchain;
9381 struct sctp_nets *net = NULL;
9382 uint32_t tsns_sent = 0;
9383 int no_fragmentflg, bundle_at, cnt_thru;
9385 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9386 struct sctp_auth_chunk *auth = NULL;
9387 uint32_t auth_offset = 0;
9388 uint16_t auth_keyid;
9389 int override_ok = 1;
9390 int data_auth_reqd = 0;
9393 SCTP_TCB_LOCK_ASSERT(stcb);
9394 tmr_started = ctl_cnt = 0;
9399 endofchain = m = NULL;
9400 auth_keyid = stcb->asoc.authinfo.active_keyid;
9401 #ifdef SCTP_AUDITING_ENABLED
9402 sctp_audit_log(0xC3, 1);
9404 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9405 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9406 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9407 asoc->sent_queue_retran_cnt);
9408 asoc->sent_queue_cnt = 0;
9409 asoc->sent_queue_cnt_removeable = 0;
9410 /* send back 0/0 so we enter normal transmission */
9414 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9415 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9416 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9417 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9418 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9421 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9422 if (chk != asoc->str_reset) {
9424 * not eligible for retran if its
9431 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9435 * Add an AUTH chunk, if chunk requires it save the
9436 * offset into the chain for AUTH
9438 if ((auth == NULL) &&
9439 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9440 stcb->asoc.peer_auth_chunks))) {
9441 m = sctp_add_auth_chunk(m, &endofchain,
9442 &auth, &auth_offset,
9444 chk->rec.chunk_id.id);
9445 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9447 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9453 /* do we have control chunks to retransmit? */
9455 /* Start a timer no matter if we succeed or fail */
9456 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9457 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9458 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9459 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9460 chk->snd_count++; /* update our count */
9461 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9462 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9463 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9464 no_fragmentflg, 0, 0,
9465 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9466 chk->whoTo->port, NULL,
9469 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9470 if (error == ENOBUFS) {
9471 asoc->ifp_had_enobuf = 1;
9472 SCTP_STAT_INCR(sctps_lowlevelerr);
9476 asoc->ifp_had_enobuf = 0;
9482 * We don't want to mark the net->sent time here since this
9483 * we use this for HB and retrans cannot measure RTT
9485 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9487 chk->sent = SCTP_DATAGRAM_SENT;
9488 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9492 /* Clean up the fwd-tsn list */
9493 sctp_clean_up_ctl(stcb, asoc, so_locked);
9498 * Ok, it is just data retransmission we need to do or that and a
9499 * fwd-tsn with it all.
9501 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9502 return (SCTP_RETRAN_DONE);
9504 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED) ||
9505 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT)) {
9506 /* not yet open, resend the cookie and that is it */
9509 #ifdef SCTP_AUDITING_ENABLED
9510 sctp_auditing(20, inp, stcb, NULL);
9512 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9513 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9514 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9515 /* No, not sent to this net or not ready for rtx */
9518 if (chk->data == NULL) {
9519 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9520 chk->rec.data.tsn, chk->snd_count, chk->sent);
9523 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9524 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9525 struct mbuf *op_err;
9526 char msg[SCTP_DIAG_INFO_LEN];
9528 SCTP_SNPRINTF(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9529 chk->rec.data.tsn, chk->snd_count);
9530 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9532 atomic_add_int(&stcb->asoc.refcnt, 1);
9533 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9535 SCTP_TCB_LOCK(stcb);
9536 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9537 return (SCTP_RETRAN_EXIT);
9539 /* pick up the net */
9541 switch (net->ro._l_addr.sa.sa_family) {
9544 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9549 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9558 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9559 /* No room in peers rwnd */
9562 tsn = asoc->last_acked_seq + 1;
9563 if (tsn == chk->rec.data.tsn) {
9565 * we make a special exception for this
9566 * case. The peer has no rwnd but is missing
9567 * the lowest chunk.. which is probably what
9568 * is holding up the rwnd.
9570 goto one_chunk_around;
9575 if (asoc->peers_rwnd < mtu) {
9577 if ((asoc->peers_rwnd == 0) &&
9578 (asoc->total_flight == 0)) {
9579 chk->window_probe = 1;
9580 chk->whoTo->window_probe = 1;
9583 #ifdef SCTP_AUDITING_ENABLED
9584 sctp_audit_log(0xC3, 2);
9588 net->fast_retran_ip = 0;
9589 if (chk->rec.data.doing_fast_retransmit == 0) {
9591 * if no FR in progress skip destination that have
9592 * flight_size > cwnd.
9594 if (net->flight_size >= net->cwnd) {
9599 * Mark the destination net to have FR recovery
9603 net->fast_retran_ip = 1;
9607 * if no AUTH is yet included and this chunk requires it,
9608 * make sure to account for it. We don't apply the size
9609 * until the AUTH chunk is actually added below in case
9610 * there is no room for this chunk.
9612 if (data_auth_reqd && (auth == NULL)) {
9613 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9617 if ((chk->send_size <= (mtu - dmtu)) ||
9618 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9619 /* ok we will add this one */
9620 if (data_auth_reqd) {
9622 m = sctp_add_auth_chunk(m,
9628 auth_keyid = chk->auth_keyid;
9630 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9631 } else if (override_ok) {
9632 auth_keyid = chk->auth_keyid;
9634 } else if (chk->auth_keyid != auth_keyid) {
9635 /* different keyid, so done bundling */
9639 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9641 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9644 /* Do clear IP_DF ? */
9645 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9648 /* upate our MTU size */
9649 if (mtu > (chk->send_size + dmtu))
9650 mtu -= (chk->send_size + dmtu);
9653 data_list[bundle_at++] = chk;
9654 if (one_chunk && (asoc->total_flight <= 0)) {
9655 SCTP_STAT_INCR(sctps_windowprobed);
9658 if (one_chunk == 0) {
9660 * now are there anymore forward from chk to pick
9663 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9664 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9665 /* Nope, not for retran */
9668 if (fwd->whoTo != net) {
9669 /* Nope, not the net in question */
9672 if (data_auth_reqd && (auth == NULL)) {
9673 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9676 if (fwd->send_size <= (mtu - dmtu)) {
9677 if (data_auth_reqd) {
9679 m = sctp_add_auth_chunk(m,
9685 auth_keyid = fwd->auth_keyid;
9687 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9688 } else if (override_ok) {
9689 auth_keyid = fwd->auth_keyid;
9691 } else if (fwd->auth_keyid != auth_keyid) {
9699 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9701 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9704 /* Do clear IP_DF ? */
9705 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9708 /* upate our MTU size */
9709 if (mtu > (fwd->send_size + dmtu))
9710 mtu -= (fwd->send_size + dmtu);
9713 data_list[bundle_at++] = fwd;
9714 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9718 /* can't fit so we are done */
9723 /* Is there something to send for this destination? */
9726 * No matter if we fail/or succeed we should start a
9727 * timer. A failure is like a lost IP packet :-)
9729 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9731 * no timer running on this destination
9734 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9737 /* Now lets send it, if there is anything to send :> */
9738 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9739 (struct sockaddr *)&net->ro._l_addr, m,
9740 auth_offset, auth, auth_keyid,
9741 no_fragmentflg, 0, 0,
9742 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9746 /* error, we could not output */
9747 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9748 if (error == ENOBUFS) {
9749 asoc->ifp_had_enobuf = 1;
9750 SCTP_STAT_INCR(sctps_lowlevelerr);
9754 asoc->ifp_had_enobuf = 0;
9761 * We don't want to mark the net->sent time here
9762 * since this we use this for HB and retrans cannot
9765 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9767 /* For auto-close */
9769 if (*now_filled == 0) {
9770 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9771 *now = asoc->time_last_sent;
9774 asoc->time_last_sent = *now;
9776 *cnt_out += bundle_at;
9777 #ifdef SCTP_AUDITING_ENABLED
9778 sctp_audit_log(0xC4, bundle_at);
9781 tsns_sent = data_list[0]->rec.data.tsn;
9783 for (i = 0; i < bundle_at; i++) {
9784 SCTP_STAT_INCR(sctps_sendretransdata);
9785 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9787 * When we have a revoked data, and we
9788 * retransmit it, then we clear the revoked
9789 * flag since this flag dictates if we
9790 * subtracted from the fs
9792 if (data_list[i]->rec.data.chunk_was_revoked) {
9793 /* Deflate the cwnd */
9794 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9795 data_list[i]->rec.data.chunk_was_revoked = 0;
9797 data_list[i]->snd_count++;
9798 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9799 /* record the time */
9800 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9801 if (data_list[i]->book_size_scale) {
9803 * need to double the book size on
9806 data_list[i]->book_size_scale = 0;
9808 * Since we double the booksize, we
9809 * must also double the output queue
9810 * size, since this get shrunk when
9811 * we free by this amount.
9813 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9814 data_list[i]->book_size *= 2;
9816 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9817 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9818 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9820 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9821 (uint32_t)(data_list[i]->send_size +
9822 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9824 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9825 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9826 data_list[i]->whoTo->flight_size,
9827 data_list[i]->book_size,
9828 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9829 data_list[i]->rec.data.tsn);
9831 sctp_flight_size_increase(data_list[i]);
9832 sctp_total_flight_increase(stcb, data_list[i]);
9833 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9834 /* SWS sender side engages */
9835 asoc->peers_rwnd = 0;
9838 (data_list[i]->rec.data.doing_fast_retransmit)) {
9839 SCTP_STAT_INCR(sctps_sendfastretrans);
9840 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9841 (tmr_started == 0)) {
9843 * ok we just fast-retrans'd
9844 * the lowest TSN, i.e the
9845 * first on the list. In
9846 * this case we want to give
9847 * some more time to get a
9848 * SACK back without a
9851 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9852 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9853 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9857 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9858 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9860 #ifdef SCTP_AUDITING_ENABLED
9861 sctp_auditing(21, inp, stcb, NULL);
9867 if (asoc->sent_queue_retran_cnt <= 0) {
9868 /* all done we have no more to retran */
9869 asoc->sent_queue_retran_cnt = 0;
9873 /* No more room in rwnd */
9876 /* stop the for loop here. we sent out a packet */
9883 sctp_timer_validation(struct sctp_inpcb *inp,
9884 struct sctp_tcb *stcb,
9885 struct sctp_association *asoc)
9887 struct sctp_nets *net;
9889 /* Validate that a timer is running somewhere */
9890 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9891 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9892 /* Here is a timer */
9896 SCTP_TCB_LOCK_ASSERT(stcb);
9897 /* Gak, we did not have a timer somewhere */
9898 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9899 if (asoc->alternate) {
9900 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9902 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9908 sctp_chunk_output(struct sctp_inpcb *inp,
9909 struct sctp_tcb *stcb,
9914 * Ok this is the generic chunk service queue. we must do the
9916 * - See if there are retransmits pending, if so we must
9918 * - Service the stream queue that is next, moving any
9919 * message (note I must get a complete message i.e.
9920 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9922 * - Check to see if the cwnd/rwnd allows any output, if so we
9923 * go ahead and fomulate and send the low level chunks. Making sure
9924 * to combine any control in the control chunk queue also.
9926 struct sctp_association *asoc;
9927 struct sctp_nets *net;
9928 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9929 unsigned int burst_cnt = 0;
9933 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9936 unsigned int tot_frs = 0;
9940 /* The Nagle algorithm is only applied when handling a send call. */
9941 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9942 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9950 SCTP_TCB_LOCK_ASSERT(stcb);
9952 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9954 if ((un_sent <= 0) &&
9955 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9956 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9957 (asoc->sent_queue_retran_cnt == 0) &&
9958 (asoc->trigger_reset == 0)) {
9959 /* Nothing to do unless there is something to be sent left */
9963 * Do we have something to send, data or control AND a sack timer
9964 * running, if so piggy-back the sack.
9966 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9967 sctp_send_sack(stcb, so_locked);
9968 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL,
9969 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
9971 while (asoc->sent_queue_retran_cnt) {
9973 * Ok, it is retransmission time only, we send out only ONE
9974 * packet with a single call off to the retran code.
9976 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9978 * Special hook for handling cookiess discarded
9979 * by peer that carried data. Send cookie-ack only
9980 * and then the next call with get the retran's.
9982 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9984 &now, &now_filled, frag_point, so_locked);
9986 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9987 /* if its not from a HB then do it */
9989 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9995 * its from any other place, we don't allow retran
9996 * output (only control)
10001 /* Can't send anymore */
10003 * now lets push out control by calling med-level
10004 * output once. this assures that we WILL send HB's
10007 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10009 &now, &now_filled, frag_point, so_locked);
10010 #ifdef SCTP_AUDITING_ENABLED
10011 sctp_auditing(8, inp, stcb, NULL);
10013 sctp_timer_validation(inp, stcb, asoc);
10018 * The count was off.. retran is not happening so do
10019 * the normal retransmission.
10021 #ifdef SCTP_AUDITING_ENABLED
10022 sctp_auditing(9, inp, stcb, NULL);
10024 if (ret == SCTP_RETRAN_EXIT) {
10029 if (from_where == SCTP_OUTPUT_FROM_T3) {
10030 /* Only one transmission allowed out of a timeout */
10031 #ifdef SCTP_AUDITING_ENABLED
10032 sctp_auditing(10, inp, stcb, NULL);
10034 /* Push out any control */
10035 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10036 &now, &now_filled, frag_point, so_locked);
10039 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10040 /* Hit FR burst limit */
10043 if ((num_out == 0) && (ret == 0)) {
10044 /* No more retrans to send */
10048 #ifdef SCTP_AUDITING_ENABLED
10049 sctp_auditing(12, inp, stcb, NULL);
10051 /* Check for bad destinations, if they exist move chunks around. */
10052 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10053 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10055 * if possible move things off of this address we
10056 * still may send below due to the dormant state but
10057 * we try to find an alternate address to send to
10058 * and if we have one we move all queued data on the
10059 * out wheel to this alternate address.
10061 if (net->ref_count > 1)
10062 sctp_move_chunks_from_net(stcb, net);
10065 * if ((asoc->sat_network) || (net->addr_is_local))
10066 * { burst_limit = asoc->max_burst *
10067 * SCTP_SAT_NETWORK_BURST_INCR; }
10069 if (asoc->max_burst > 0) {
10070 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10071 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10073 * JRS - Use the congestion
10074 * control given in the
10075 * congestion control module
10077 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10078 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10079 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10081 SCTP_STAT_INCR(sctps_maxburstqueued);
10083 net->fast_retran_ip = 0;
10085 if (net->flight_size == 0) {
10087 * Should be decaying the
10098 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10099 &reason_code, 0, from_where,
10100 &now, &now_filled, frag_point, so_locked);
10102 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10103 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10104 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10106 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10107 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10108 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10112 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10114 tot_out += num_out;
10116 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10117 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10118 if (num_out == 0) {
10119 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10124 * When the Nagle algorithm is used, look at how
10125 * much is unsent, then if its smaller than an MTU
10126 * and we have data in flight we stop, except if we
10127 * are handling a fragmented user message.
10129 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10130 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10131 (stcb->asoc.total_flight > 0)) {
10132 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10136 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10137 TAILQ_EMPTY(&asoc->send_queue) &&
10138 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10139 /* Nothing left to send */
10142 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10143 /* Nothing left to send */
10146 } while (num_out &&
10147 ((asoc->max_burst == 0) ||
10148 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10149 (burst_cnt < asoc->max_burst)));
10151 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10152 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10153 SCTP_STAT_INCR(sctps_maxburstqueued);
10154 asoc->burst_limit_applied = 1;
10155 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10156 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10159 asoc->burst_limit_applied = 0;
10162 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10163 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10165 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10169 * Now we need to clean up the control chunk chain if a ECNE is on
10170 * it. It must be marked as UNSENT again so next call will continue
10171 * to send it until such time that we get a CWR, to remove it.
10173 if (stcb->asoc.ecn_echo_cnt_onq)
10174 sctp_fix_ecn_echo(asoc);
10176 if (stcb->asoc.trigger_reset) {
10177 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10186 struct sctp_inpcb *inp,
10188 struct sockaddr *addr,
10189 struct mbuf *control,
10194 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10198 if (inp->sctp_socket == NULL) {
10199 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10202 return (sctp_sosend(inp->sctp_socket,
10204 (struct uio *)NULL,
10212 send_forward_tsn(struct sctp_tcb *stcb,
10213 struct sctp_association *asoc)
10215 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10216 struct sctp_forward_tsn_chunk *fwdtsn;
10217 struct sctp_strseq *strseq;
10218 struct sctp_strseq_mid *strseq_m;
10219 uint32_t advance_peer_ack_point;
10220 unsigned int cnt_of_space, i, ovh;
10221 unsigned int space_needed;
10222 unsigned int cnt_of_skipped = 0;
10224 SCTP_TCB_LOCK_ASSERT(stcb);
10225 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10226 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10227 /* mark it to unsent */
10228 chk->sent = SCTP_DATAGRAM_UNSENT;
10229 chk->snd_count = 0;
10230 /* Do we correct its output location? */
10232 sctp_free_remote_addr(chk->whoTo);
10235 goto sctp_fill_in_rest;
10238 /* Ok if we reach here we must build one */
10239 sctp_alloc_a_chunk(stcb, chk);
10243 asoc->fwd_tsn_cnt++;
10244 chk->copy_by_ref = 0;
10246 * We don't do the old thing here since this is used not for on-wire
10247 * but to tell if we are sending a fwd-tsn by the stack during
10248 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10250 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10251 chk->rec.chunk_id.can_take_data = 0;
10255 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10256 if (chk->data == NULL) {
10257 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10260 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10261 chk->sent = SCTP_DATAGRAM_UNSENT;
10262 chk->snd_count = 0;
10263 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10264 asoc->ctrl_queue_cnt++;
10267 * Here we go through and fill out the part that deals with
10268 * stream/seq of the ones we skip.
10270 SCTP_BUF_LEN(chk->data) = 0;
10271 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10272 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10273 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10274 /* no more to look at */
10277 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10278 /* We don't report these */
10283 if (asoc->idata_supported) {
10284 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10285 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10287 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10288 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10290 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10292 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10293 ovh = SCTP_MIN_OVERHEAD;
10295 ovh = SCTP_MIN_V4_OVERHEAD;
10297 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10298 /* trim to a mtu size */
10299 cnt_of_space = asoc->smallest_mtu - ovh;
10301 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10302 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10303 0xff, 0, cnt_of_skipped,
10304 asoc->advanced_peer_ack_point);
10306 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10307 if (cnt_of_space < space_needed) {
10309 * ok we must trim down the chunk by lowering the
10310 * advance peer ack point.
10312 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10313 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10314 0xff, 0xff, cnt_of_space,
10317 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10318 if (asoc->idata_supported) {
10319 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10321 cnt_of_skipped /= sizeof(struct sctp_strseq);
10324 * Go through and find the TSN that will be the one
10327 at = TAILQ_FIRST(&asoc->sent_queue);
10329 for (i = 0; i < cnt_of_skipped; i++) {
10330 tp1 = TAILQ_NEXT(at, sctp_next);
10337 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10338 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10339 0xff, cnt_of_skipped, at->rec.data.tsn,
10340 asoc->advanced_peer_ack_point);
10344 * last now points to last one I can report, update
10348 advance_peer_ack_point = last->rec.data.tsn;
10350 if (asoc->idata_supported) {
10351 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10352 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10354 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10355 cnt_of_skipped * sizeof(struct sctp_strseq);
10358 chk->send_size = space_needed;
10359 /* Setup the chunk */
10360 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10361 fwdtsn->ch.chunk_length = htons(chk->send_size);
10362 fwdtsn->ch.chunk_flags = 0;
10363 if (asoc->idata_supported) {
10364 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10366 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10368 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10369 SCTP_BUF_LEN(chk->data) = chk->send_size;
10372 * Move pointer to after the fwdtsn and transfer to the
10375 if (asoc->idata_supported) {
10376 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10379 strseq = (struct sctp_strseq *)fwdtsn;
10383 * Now populate the strseq list. This is done blindly
10384 * without pulling out duplicate stream info. This is
10385 * inefficent but won't harm the process since the peer will
10386 * look at these in sequence and will thus release anything.
10387 * It could mean we exceed the PMTU and chop off some that
10388 * we could have included.. but this is unlikely (aka 1432/4
10389 * would mean 300+ stream seq's would have to be reported in
10390 * one FWD-TSN. With a bit of work we can later FIX this to
10391 * optimize and pull out duplicates.. but it does add more
10392 * overhead. So for now... not!
10395 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10396 if (i >= cnt_of_skipped) {
10399 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10400 /* We don't report these */
10403 if (at->rec.data.tsn == advance_peer_ack_point) {
10404 at->rec.data.fwd_tsn_cnt = 0;
10406 if (asoc->idata_supported) {
10407 strseq_m->sid = htons(at->rec.data.sid);
10408 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10409 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10411 strseq_m->flags = 0;
10413 strseq_m->mid = htonl(at->rec.data.mid);
10416 strseq->sid = htons(at->rec.data.sid);
10417 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10426 sctp_send_sack(struct sctp_tcb *stcb, int so_locked)
10429 * Queue up a SACK or NR-SACK in the control queue.
10430 * We must first check to see if a SACK or NR-SACK is
10431 * somehow on the control queue.
10432 * If so, we will take and and remove the old one.
10434 struct sctp_association *asoc;
10435 struct sctp_tmit_chunk *chk, *a_chk;
10436 struct sctp_sack_chunk *sack;
10437 struct sctp_nr_sack_chunk *nr_sack;
10438 struct sctp_gap_ack_block *gap_descriptor;
10439 const struct sack_track *selector;
10444 int limit_reached = 0;
10445 unsigned int i, siz, j;
10446 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10449 uint32_t highest_tsn;
10454 if (stcb->asoc.nrsack_supported == 1) {
10455 type = SCTP_NR_SELECTIVE_ACK;
10457 type = SCTP_SELECTIVE_ACK;
10460 asoc = &stcb->asoc;
10461 SCTP_TCB_LOCK_ASSERT(stcb);
10462 if (asoc->last_data_chunk_from == NULL) {
10463 /* Hmm we never received anything */
10466 sctp_slide_mapping_arrays(stcb);
10467 sctp_set_rwnd(stcb, asoc);
10468 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10469 if (chk->rec.chunk_id.id == type) {
10470 /* Hmm, found a sack already on queue, remove it */
10471 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10472 asoc->ctrl_queue_cnt--;
10475 sctp_m_freem(a_chk->data);
10476 a_chk->data = NULL;
10478 if (a_chk->whoTo) {
10479 sctp_free_remote_addr(a_chk->whoTo);
10480 a_chk->whoTo = NULL;
10485 if (a_chk == NULL) {
10486 sctp_alloc_a_chunk(stcb, a_chk);
10487 if (a_chk == NULL) {
10488 /* No memory so we drop the idea, and set a timer */
10489 if (stcb->asoc.delayed_ack) {
10490 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10491 stcb->sctp_ep, stcb, NULL,
10492 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10493 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10494 stcb->sctp_ep, stcb, NULL);
10496 stcb->asoc.send_sack = 1;
10500 a_chk->copy_by_ref = 0;
10501 a_chk->rec.chunk_id.id = type;
10502 a_chk->rec.chunk_id.can_take_data = 1;
10504 /* Clear our pkt counts */
10505 asoc->data_pkts_seen = 0;
10508 a_chk->asoc = asoc;
10509 a_chk->snd_count = 0;
10510 a_chk->send_size = 0; /* fill in later */
10511 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10512 a_chk->whoTo = NULL;
10514 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10516 * Ok, the destination for the SACK is unreachable, lets see if
10517 * we can select an alternate to asoc->last_data_chunk_from
10519 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10520 if (a_chk->whoTo == NULL) {
10521 /* Nope, no alternate */
10522 a_chk->whoTo = asoc->last_data_chunk_from;
10525 a_chk->whoTo = asoc->last_data_chunk_from;
10527 if (a_chk->whoTo) {
10528 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10530 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10531 highest_tsn = asoc->highest_tsn_inside_map;
10533 highest_tsn = asoc->highest_tsn_inside_nr_map;
10535 if (highest_tsn == asoc->cumulative_tsn) {
10537 if (type == SCTP_SELECTIVE_ACK) {
10538 space_req = sizeof(struct sctp_sack_chunk);
10540 space_req = sizeof(struct sctp_nr_sack_chunk);
10543 /* gaps get a cluster */
10544 space_req = MCLBYTES;
10546 /* Ok now lets formulate a MBUF with our sack */
10547 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10548 if ((a_chk->data == NULL) ||
10549 (a_chk->whoTo == NULL)) {
10550 /* rats, no mbuf memory */
10552 /* was a problem with the destination */
10553 sctp_m_freem(a_chk->data);
10554 a_chk->data = NULL;
10556 sctp_free_a_chunk(stcb, a_chk, so_locked);
10557 /* sa_ignore NO_NULL_CHK */
10558 if (stcb->asoc.delayed_ack) {
10559 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10560 stcb->sctp_ep, stcb, NULL,
10561 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10562 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10563 stcb->sctp_ep, stcb, NULL);
10565 stcb->asoc.send_sack = 1;
10569 /* ok, lets go through and fill it in */
10570 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10571 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10572 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10573 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10575 limit = mtod(a_chk->data, caddr_t);
10580 if ((asoc->sctp_cmt_on_off > 0) &&
10581 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10583 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10584 * received, then set high bit to 1, else 0. Reset
10587 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10588 asoc->cmt_dac_pkts_rcvd = 0;
10590 #ifdef SCTP_ASOCLOG_OF_TSNS
10591 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10592 stcb->asoc.cumack_log_atsnt++;
10593 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10594 stcb->asoc.cumack_log_atsnt = 0;
10597 /* reset the readers interpretation */
10598 stcb->freed_by_sorcv_sincelast = 0;
10600 if (type == SCTP_SELECTIVE_ACK) {
10601 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10603 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10604 if (highest_tsn > asoc->mapping_array_base_tsn) {
10605 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10607 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + highest_tsn + 7) / 8;
10611 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10612 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10613 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10614 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10616 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10620 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10623 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10625 if (((type == SCTP_SELECTIVE_ACK) &&
10626 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10627 ((type == SCTP_NR_SELECTIVE_ACK) &&
10628 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10629 /* we have a gap .. maybe */
10630 for (i = 0; i < siz; i++) {
10631 tsn_map = asoc->mapping_array[i];
10632 if (type == SCTP_SELECTIVE_ACK) {
10633 tsn_map |= asoc->nr_mapping_array[i];
10637 * Clear all bits corresponding to TSNs
10638 * smaller or equal to the cumulative TSN.
10640 tsn_map &= (~0U << (1 - offset));
10642 selector = &sack_array[tsn_map];
10643 if (mergeable && selector->right_edge) {
10645 * Backup, left and right edges were ok to
10651 if (selector->num_entries == 0)
10654 for (j = 0; j < selector->num_entries; j++) {
10655 if (mergeable && selector->right_edge) {
10657 * do a merge by NOT setting
10663 * no merge, set the left
10667 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10669 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10672 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10678 if (selector->left_edge) {
10682 if (limit_reached) {
10683 /* Reached the limit stop */
10689 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10690 (limit_reached == 0)) {
10693 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10694 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10696 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10699 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10702 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10704 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10705 /* we have a gap .. maybe */
10706 for (i = 0; i < siz; i++) {
10707 tsn_map = asoc->nr_mapping_array[i];
10710 * Clear all bits corresponding to
10711 * TSNs smaller or equal to the
10714 tsn_map &= (~0U << (1 - offset));
10716 selector = &sack_array[tsn_map];
10717 if (mergeable && selector->right_edge) {
10719 * Backup, left and right edges were
10722 num_nr_gap_blocks--;
10725 if (selector->num_entries == 0)
10728 for (j = 0; j < selector->num_entries; j++) {
10729 if (mergeable && selector->right_edge) {
10731 * do a merge by NOT
10738 * no merge, set the
10742 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10744 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10745 num_nr_gap_blocks++;
10747 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10753 if (selector->left_edge) {
10757 if (limit_reached) {
10758 /* Reached the limit stop */
10765 /* now we must add any dups we are going to report. */
10766 if ((limit_reached == 0) && (asoc->numduptsns)) {
10767 dup = (uint32_t *)gap_descriptor;
10768 for (i = 0; i < asoc->numduptsns; i++) {
10769 *dup = htonl(asoc->dup_tsns[i]);
10772 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10777 asoc->numduptsns = 0;
10780 * now that the chunk is prepared queue it to the control chunk
10783 if (type == SCTP_SELECTIVE_ACK) {
10784 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10785 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10786 num_dups * sizeof(int32_t));
10787 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10788 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10789 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10790 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10791 sack->sack.num_dup_tsns = htons(num_dups);
10792 sack->ch.chunk_type = type;
10793 sack->ch.chunk_flags = flags;
10794 sack->ch.chunk_length = htons(a_chk->send_size);
10796 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10797 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10798 num_dups * sizeof(int32_t));
10799 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10800 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10801 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10802 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10803 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10804 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10805 nr_sack->nr_sack.reserved = 0;
10806 nr_sack->ch.chunk_type = type;
10807 nr_sack->ch.chunk_flags = flags;
10808 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10810 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10811 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10812 asoc->ctrl_queue_cnt++;
10813 asoc->send_sack = 0;
10814 SCTP_STAT_INCR(sctps_sendsacks);
10819 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked)
10821 struct mbuf *m_abort, *m, *m_last;
10822 struct mbuf *m_out, *m_end = NULL;
10823 struct sctp_abort_chunk *abort;
10824 struct sctp_auth_chunk *auth = NULL;
10825 struct sctp_nets *net;
10827 uint32_t auth_offset = 0;
10829 uint16_t cause_len, chunk_len, padding_len;
10831 SCTP_TCB_LOCK_ASSERT(stcb);
10833 * Add an AUTH chunk, if chunk requires it and save the offset into
10834 * the chain for AUTH
10836 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10837 stcb->asoc.peer_auth_chunks)) {
10838 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10839 stcb, SCTP_ABORT_ASSOCIATION);
10840 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10844 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10845 if (m_abort == NULL) {
10847 sctp_m_freem(m_out);
10850 sctp_m_freem(operr);
10854 /* link in any error */
10855 SCTP_BUF_NEXT(m_abort) = operr;
10858 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10859 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10860 if (SCTP_BUF_NEXT(m) == NULL) {
10864 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10865 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10866 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10867 if (m_out == NULL) {
10868 /* NO Auth chunk prepended, so reserve space in front */
10869 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10872 /* Put AUTH chunk at the front of the chain */
10873 SCTP_BUF_NEXT(m_end) = m_abort;
10875 if (stcb->asoc.alternate) {
10876 net = stcb->asoc.alternate;
10878 net = stcb->asoc.primary_destination;
10880 /* Fill in the ABORT chunk header. */
10881 abort = mtod(m_abort, struct sctp_abort_chunk *);
10882 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10883 if (stcb->asoc.peer_vtag == 0) {
10884 /* This happens iff the assoc is in COOKIE-WAIT state. */
10885 vtag = stcb->asoc.my_vtag;
10886 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10888 vtag = stcb->asoc.peer_vtag;
10889 abort->ch.chunk_flags = 0;
10891 abort->ch.chunk_length = htons(chunk_len);
10892 /* Add padding, if necessary. */
10893 if (padding_len > 0) {
10894 if ((m_last == NULL) ||
10895 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10896 sctp_m_freem(m_out);
10900 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10901 (struct sockaddr *)&net->ro._l_addr,
10902 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10903 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10904 stcb->asoc.primary_destination->port, NULL,
10907 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10908 if (error == ENOBUFS) {
10909 stcb->asoc.ifp_had_enobuf = 1;
10910 SCTP_STAT_INCR(sctps_lowlevelerr);
10913 stcb->asoc.ifp_had_enobuf = 0;
10915 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10919 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10920 struct sctp_nets *net,
10923 /* formulate and SEND a SHUTDOWN-COMPLETE */
10924 struct mbuf *m_shutdown_comp;
10925 struct sctp_shutdown_complete_chunk *shutdown_complete;
10930 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10931 if (m_shutdown_comp == NULL) {
10935 if (reflect_vtag) {
10936 flags = SCTP_HAD_NO_TCB;
10937 vtag = stcb->asoc.my_vtag;
10940 vtag = stcb->asoc.peer_vtag;
10942 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10943 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10944 shutdown_complete->ch.chunk_flags = flags;
10945 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10946 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10947 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10948 (struct sockaddr *)&net->ro._l_addr,
10949 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10950 stcb->sctp_ep->sctp_lport, stcb->rport,
10954 SCTP_SO_NOT_LOCKED))) {
10955 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10956 if (error == ENOBUFS) {
10957 stcb->asoc.ifp_had_enobuf = 1;
10958 SCTP_STAT_INCR(sctps_lowlevelerr);
10961 stcb->asoc.ifp_had_enobuf = 0;
10963 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10968 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10969 struct sctphdr *sh, uint32_t vtag,
10970 uint8_t type, struct mbuf *cause,
10971 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
10972 uint32_t vrf_id, uint16_t port)
10974 struct mbuf *o_pak;
10976 struct sctphdr *shout;
10977 struct sctp_chunkhdr *ch;
10978 #if defined(INET) || defined(INET6)
10979 struct udphdr *udp;
10981 int ret, len, cause_len, padding_len;
10983 struct sockaddr_in *src_sin, *dst_sin;
10987 struct sockaddr_in6 *src_sin6, *dst_sin6;
10988 struct ip6_hdr *ip6;
10991 /* Compute the length of the cause and add final padding. */
10993 if (cause != NULL) {
10994 struct mbuf *m_at, *m_last = NULL;
10996 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10997 if (SCTP_BUF_NEXT(m_at) == NULL)
10999 cause_len += SCTP_BUF_LEN(m_at);
11001 padding_len = cause_len % 4;
11002 if (padding_len != 0) {
11003 padding_len = 4 - padding_len;
11005 if (padding_len != 0) {
11006 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11007 sctp_m_freem(cause);
11014 /* Get an mbuf for the header. */
11015 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11016 switch (dst->sa_family) {
11019 len += sizeof(struct ip);
11024 len += sizeof(struct ip6_hdr);
11030 #if defined(INET) || defined(INET6)
11032 len += sizeof(struct udphdr);
11035 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11036 if (mout == NULL) {
11038 sctp_m_freem(cause);
11042 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11043 SCTP_BUF_LEN(mout) = len;
11044 SCTP_BUF_NEXT(mout) = cause;
11045 M_SETFIB(mout, fibnum);
11046 mout->m_pkthdr.flowid = mflowid;
11047 M_HASHTYPE_SET(mout, mflowtype);
11054 switch (dst->sa_family) {
11057 src_sin = (struct sockaddr_in *)src;
11058 dst_sin = (struct sockaddr_in *)dst;
11059 ip = mtod(mout, struct ip *);
11060 ip->ip_v = IPVERSION;
11061 ip->ip_hl = (sizeof(struct ip) >> 2);
11063 ip->ip_off = htons(IP_DF);
11065 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11067 ip->ip_p = IPPROTO_UDP;
11069 ip->ip_p = IPPROTO_SCTP;
11071 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11072 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11074 len = sizeof(struct ip);
11075 shout = (struct sctphdr *)((caddr_t)ip + len);
11080 src_sin6 = (struct sockaddr_in6 *)src;
11081 dst_sin6 = (struct sockaddr_in6 *)dst;
11082 ip6 = mtod(mout, struct ip6_hdr *);
11083 ip6->ip6_flow = htonl(0x60000000);
11084 if (V_ip6_auto_flowlabel) {
11085 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11087 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11089 ip6->ip6_nxt = IPPROTO_UDP;
11091 ip6->ip6_nxt = IPPROTO_SCTP;
11093 ip6->ip6_src = dst_sin6->sin6_addr;
11094 ip6->ip6_dst = src_sin6->sin6_addr;
11095 len = sizeof(struct ip6_hdr);
11096 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11101 shout = mtod(mout, struct sctphdr *);
11104 #if defined(INET) || defined(INET6)
11106 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11107 sctp_m_freem(mout);
11110 udp = (struct udphdr *)shout;
11111 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11112 udp->uh_dport = port;
11114 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11115 sizeof(struct sctphdr) +
11116 sizeof(struct sctp_chunkhdr) +
11117 cause_len + padding_len));
11118 len += sizeof(struct udphdr);
11119 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11124 shout->src_port = sh->dest_port;
11125 shout->dest_port = sh->src_port;
11126 shout->checksum = 0;
11128 shout->v_tag = htonl(vtag);
11130 shout->v_tag = sh->v_tag;
11132 len += sizeof(struct sctphdr);
11133 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11134 ch->chunk_type = type;
11136 ch->chunk_flags = 0;
11138 ch->chunk_flags = SCTP_HAD_NO_TCB;
11140 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11141 len += sizeof(struct sctp_chunkhdr);
11142 len += cause_len + padding_len;
11144 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11145 sctp_m_freem(mout);
11148 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11149 switch (dst->sa_family) {
11154 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11159 ip->ip_len = htons(len);
11161 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11162 SCTP_STAT_INCR(sctps_sendswcrc);
11164 SCTP_ENABLE_UDP_CSUM(o_pak);
11167 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11168 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11169 SCTP_STAT_INCR(sctps_sendhwcrc);
11171 #ifdef SCTP_PACKET_LOGGING
11172 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11173 sctp_packet_log(o_pak);
11176 SCTP_PROBE5(send, NULL, NULL, ip, NULL, shout);
11177 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11182 ip6->ip6_plen = htons((uint16_t)(len - sizeof(struct ip6_hdr)));
11184 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11185 SCTP_STAT_INCR(sctps_sendswcrc);
11186 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11187 udp->uh_sum = 0xffff;
11190 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11191 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11192 SCTP_STAT_INCR(sctps_sendhwcrc);
11194 #ifdef SCTP_PACKET_LOGGING
11195 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11196 sctp_packet_log(o_pak);
11199 SCTP_PROBE5(send, NULL, NULL, ip6, NULL, shout);
11200 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11204 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11206 sctp_m_freem(mout);
11207 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11210 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11212 UDPSTAT_INC(udps_opackets);
11214 SCTP_STAT_INCR(sctps_sendpackets);
11215 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11216 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11218 SCTP_STAT_INCR(sctps_senderrors);
11224 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11225 struct sctphdr *sh,
11226 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11227 uint32_t vrf_id, uint16_t port)
11229 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11230 mflowtype, mflowid, fibnum,
11235 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked)
11237 struct sctp_tmit_chunk *chk;
11238 struct sctp_heartbeat_chunk *hb;
11239 struct timeval now;
11241 SCTP_TCB_LOCK_ASSERT(stcb);
11245 (void)SCTP_GETTIME_TIMEVAL(&now);
11246 switch (net->ro._l_addr.sa.sa_family) {
11258 sctp_alloc_a_chunk(stcb, chk);
11260 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11264 chk->copy_by_ref = 0;
11265 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11266 chk->rec.chunk_id.can_take_data = 1;
11268 chk->asoc = &stcb->asoc;
11269 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11271 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11272 if (chk->data == NULL) {
11273 sctp_free_a_chunk(stcb, chk, so_locked);
11276 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11277 SCTP_BUF_LEN(chk->data) = chk->send_size;
11278 chk->sent = SCTP_DATAGRAM_UNSENT;
11279 chk->snd_count = 0;
11281 atomic_add_int(&chk->whoTo->ref_count, 1);
11282 /* Now we have a mbuf that we can fill in with the details */
11283 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11284 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11285 /* fill out chunk header */
11286 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11287 hb->ch.chunk_flags = 0;
11288 hb->ch.chunk_length = htons(chk->send_size);
11289 /* Fill out hb parameter */
11290 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11291 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11292 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11293 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11294 /* Did our user request this one, put it in */
11295 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11296 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11297 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11299 * we only take from the entropy pool if the address is not
11302 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11303 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11305 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11306 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11308 switch (net->ro._l_addr.sa.sa_family) {
11311 memcpy(hb->heartbeat.hb_info.address,
11312 &net->ro._l_addr.sin.sin_addr,
11313 sizeof(net->ro._l_addr.sin.sin_addr));
11318 memcpy(hb->heartbeat.hb_info.address,
11319 &net->ro._l_addr.sin6.sin6_addr,
11320 sizeof(net->ro._l_addr.sin6.sin6_addr));
11325 sctp_m_freem(chk->data);
11328 sctp_free_a_chunk(stcb, chk, so_locked);
11332 net->hb_responded = 0;
11333 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11334 stcb->asoc.ctrl_queue_cnt++;
11335 SCTP_STAT_INCR(sctps_sendheartbeat);
11340 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11343 struct sctp_association *asoc;
11344 struct sctp_ecne_chunk *ecne;
11345 struct sctp_tmit_chunk *chk;
11350 asoc = &stcb->asoc;
11351 SCTP_TCB_LOCK_ASSERT(stcb);
11352 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11353 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11354 /* found a previous ECN_ECHO update it if needed */
11355 uint32_t cnt, ctsn;
11357 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11358 ctsn = ntohl(ecne->tsn);
11359 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11360 ecne->tsn = htonl(high_tsn);
11361 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11363 cnt = ntohl(ecne->num_pkts_since_cwr);
11365 ecne->num_pkts_since_cwr = htonl(cnt);
11369 /* nope could not find one to update so we must build one */
11370 sctp_alloc_a_chunk(stcb, chk);
11374 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11375 chk->copy_by_ref = 0;
11376 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11377 chk->rec.chunk_id.can_take_data = 0;
11379 chk->asoc = &stcb->asoc;
11380 chk->send_size = sizeof(struct sctp_ecne_chunk);
11381 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11382 if (chk->data == NULL) {
11383 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11386 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11387 SCTP_BUF_LEN(chk->data) = chk->send_size;
11388 chk->sent = SCTP_DATAGRAM_UNSENT;
11389 chk->snd_count = 0;
11391 atomic_add_int(&chk->whoTo->ref_count, 1);
11393 stcb->asoc.ecn_echo_cnt_onq++;
11394 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11395 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11396 ecne->ch.chunk_flags = 0;
11397 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11398 ecne->tsn = htonl(high_tsn);
11399 ecne->num_pkts_since_cwr = htonl(1);
11400 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11401 asoc->ctrl_queue_cnt++;
11405 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11406 struct mbuf *m, int len, int iphlen, int bad_crc)
11408 struct sctp_association *asoc;
11409 struct sctp_pktdrop_chunk *drp;
11410 struct sctp_tmit_chunk *chk;
11416 struct sctp_chunkhdr *ch, chunk_buf;
11417 unsigned int chk_length;
11422 asoc = &stcb->asoc;
11423 SCTP_TCB_LOCK_ASSERT(stcb);
11424 if (asoc->pktdrop_supported == 0) {
11426 * peer must declare support before I send one.
11430 if (stcb->sctp_socket == NULL) {
11433 sctp_alloc_a_chunk(stcb, chk);
11437 chk->copy_by_ref = 0;
11438 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11439 chk->rec.chunk_id.can_take_data = 1;
11442 chk->send_size = len;
11443 /* Validate that we do not have an ABORT in here. */
11444 offset = iphlen + sizeof(struct sctphdr);
11445 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11446 sizeof(*ch), (uint8_t *)&chunk_buf);
11447 while (ch != NULL) {
11448 chk_length = ntohs(ch->chunk_length);
11449 if (chk_length < sizeof(*ch)) {
11450 /* break to abort land */
11453 switch (ch->chunk_type) {
11454 case SCTP_PACKET_DROPPED:
11455 case SCTP_ABORT_ASSOCIATION:
11456 case SCTP_INITIATION_ACK:
11458 * We don't respond with an PKT-DROP to an ABORT
11459 * or PKT-DROP. We also do not respond to an
11460 * INIT-ACK, because we can't know if the initiation
11461 * tag is correct or not.
11463 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11468 offset += SCTP_SIZE32(chk_length);
11469 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11470 sizeof(*ch), (uint8_t *)&chunk_buf);
11473 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11474 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11476 * only send 1 mtu worth, trim off the excess on the end.
11479 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11482 chk->asoc = &stcb->asoc;
11483 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11484 if (chk->data == NULL) {
11486 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11489 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11490 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11492 sctp_m_freem(chk->data);
11496 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11497 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11498 chk->book_size_scale = 0;
11500 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11501 drp->trunc_len = htons(fullsz);
11503 * Len is already adjusted to size minus overhead above take
11504 * out the pkt_drop chunk itself from it.
11506 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11507 len = chk->send_size;
11509 /* no truncation needed */
11510 drp->ch.chunk_flags = 0;
11511 drp->trunc_len = htons(0);
11514 drp->ch.chunk_flags |= SCTP_BADCRC;
11516 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11517 SCTP_BUF_LEN(chk->data) = chk->send_size;
11518 chk->sent = SCTP_DATAGRAM_UNSENT;
11519 chk->snd_count = 0;
11521 /* we should hit here */
11523 atomic_add_int(&chk->whoTo->ref_count, 1);
11527 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11528 drp->ch.chunk_length = htons(chk->send_size);
11529 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11533 drp->bottle_bw = htonl(spc);
11534 if (asoc->my_rwnd) {
11535 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11536 asoc->size_on_all_streams +
11537 asoc->my_rwnd_control_len +
11538 stcb->sctp_socket->so_rcv.sb_cc);
11541 * If my rwnd is 0, possibly from mbuf depletion as well as
11542 * space used, tell the peer there is NO space aka onq == bw
11544 drp->current_onq = htonl(spc);
11548 m_copydata(m, iphlen, len, (caddr_t)datap);
11549 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11550 asoc->ctrl_queue_cnt++;
11554 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11556 struct sctp_association *asoc;
11557 struct sctp_cwr_chunk *cwr;
11558 struct sctp_tmit_chunk *chk;
11560 SCTP_TCB_LOCK_ASSERT(stcb);
11564 asoc = &stcb->asoc;
11565 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11566 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11568 * found a previous CWR queued to same destination
11569 * update it if needed
11573 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11574 ctsn = ntohl(cwr->tsn);
11575 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11576 cwr->tsn = htonl(high_tsn);
11578 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11579 /* Make sure override is carried */
11580 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11585 sctp_alloc_a_chunk(stcb, chk);
11589 chk->copy_by_ref = 0;
11590 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11591 chk->rec.chunk_id.can_take_data = 1;
11593 chk->asoc = &stcb->asoc;
11594 chk->send_size = sizeof(struct sctp_cwr_chunk);
11595 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11596 if (chk->data == NULL) {
11597 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11600 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11601 SCTP_BUF_LEN(chk->data) = chk->send_size;
11602 chk->sent = SCTP_DATAGRAM_UNSENT;
11603 chk->snd_count = 0;
11605 atomic_add_int(&chk->whoTo->ref_count, 1);
11606 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11607 cwr->ch.chunk_type = SCTP_ECN_CWR;
11608 cwr->ch.chunk_flags = override;
11609 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11610 cwr->tsn = htonl(high_tsn);
11611 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11612 asoc->ctrl_queue_cnt++;
11616 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11617 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11619 uint16_t len, old_len, i;
11620 struct sctp_stream_reset_out_request *req_out;
11621 struct sctp_chunkhdr *ch;
11623 int number_entries = 0;
11625 ch = mtod(chk->data, struct sctp_chunkhdr *);
11626 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11627 /* get to new offset for the param. */
11628 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11629 /* now how long will this param be? */
11630 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11631 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11632 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11633 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11637 if (number_entries == 0) {
11640 if (number_entries == stcb->asoc.streamoutcnt) {
11641 number_entries = 0;
11643 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11644 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11646 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11647 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11648 req_out->ph.param_length = htons(len);
11649 req_out->request_seq = htonl(seq);
11650 req_out->response_seq = htonl(resp_seq);
11651 req_out->send_reset_at_tsn = htonl(last_sent);
11653 if (number_entries) {
11654 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11655 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11656 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11657 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11658 req_out->list_of_streams[at] = htons(i);
11660 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11661 if (at >= number_entries) {
11667 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11668 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11671 if (SCTP_SIZE32(len) > len) {
11673 * Need to worry about the pad we may end up adding to the
11674 * end. This is easy since the struct is either aligned to 4
11675 * bytes or 2 bytes off.
11677 req_out->list_of_streams[number_entries] = 0;
11679 /* now fix the chunk length */
11680 ch->chunk_length = htons(len + old_len);
11681 chk->book_size = len + old_len;
11682 chk->book_size_scale = 0;
11683 chk->send_size = SCTP_SIZE32(chk->book_size);
11684 SCTP_BUF_LEN(chk->data) = chk->send_size;
11689 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11690 int number_entries, uint16_t *list,
11693 uint16_t len, old_len, i;
11694 struct sctp_stream_reset_in_request *req_in;
11695 struct sctp_chunkhdr *ch;
11697 ch = mtod(chk->data, struct sctp_chunkhdr *);
11698 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11700 /* get to new offset for the param. */
11701 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11702 /* now how long will this param be? */
11703 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11704 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11705 req_in->ph.param_length = htons(len);
11706 req_in->request_seq = htonl(seq);
11707 if (number_entries) {
11708 for (i = 0; i < number_entries; i++) {
11709 req_in->list_of_streams[i] = htons(list[i]);
11712 if (SCTP_SIZE32(len) > len) {
11714 * Need to worry about the pad we may end up adding to the
11715 * end. This is easy since the struct is either aligned to 4
11716 * bytes or 2 bytes off.
11718 req_in->list_of_streams[number_entries] = 0;
11720 /* now fix the chunk length */
11721 ch->chunk_length = htons(len + old_len);
11722 chk->book_size = len + old_len;
11723 chk->book_size_scale = 0;
11724 chk->send_size = SCTP_SIZE32(chk->book_size);
11725 SCTP_BUF_LEN(chk->data) = chk->send_size;
11730 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11733 uint16_t len, old_len;
11734 struct sctp_stream_reset_tsn_request *req_tsn;
11735 struct sctp_chunkhdr *ch;
11737 ch = mtod(chk->data, struct sctp_chunkhdr *);
11738 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11740 /* get to new offset for the param. */
11741 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11742 /* now how long will this param be? */
11743 len = sizeof(struct sctp_stream_reset_tsn_request);
11744 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11745 req_tsn->ph.param_length = htons(len);
11746 req_tsn->request_seq = htonl(seq);
11748 /* now fix the chunk length */
11749 ch->chunk_length = htons(len + old_len);
11750 chk->send_size = len + old_len;
11751 chk->book_size = SCTP_SIZE32(chk->send_size);
11752 chk->book_size_scale = 0;
11753 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11758 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11759 uint32_t resp_seq, uint32_t result)
11761 uint16_t len, old_len;
11762 struct sctp_stream_reset_response *resp;
11763 struct sctp_chunkhdr *ch;
11765 ch = mtod(chk->data, struct sctp_chunkhdr *);
11766 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11768 /* get to new offset for the param. */
11769 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11770 /* now how long will this param be? */
11771 len = sizeof(struct sctp_stream_reset_response);
11772 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11773 resp->ph.param_length = htons(len);
11774 resp->response_seq = htonl(resp_seq);
11775 resp->result = ntohl(result);
11777 /* now fix the chunk length */
11778 ch->chunk_length = htons(len + old_len);
11779 chk->book_size = len + old_len;
11780 chk->book_size_scale = 0;
11781 chk->send_size = SCTP_SIZE32(chk->book_size);
11782 SCTP_BUF_LEN(chk->data) = chk->send_size;
11787 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11788 struct sctp_stream_reset_list *ent,
11791 struct sctp_association *asoc;
11792 struct sctp_tmit_chunk *chk;
11793 struct sctp_chunkhdr *ch;
11795 asoc = &stcb->asoc;
11798 * Reset our last reset action to the new one IP -> response
11799 * (PERFORMED probably). This assures that if we fail to send, a
11800 * retran from the peer will get the new response.
11802 asoc->last_reset_action[0] = response;
11803 if (asoc->stream_reset_outstanding) {
11806 sctp_alloc_a_chunk(stcb, chk);
11808 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11811 chk->copy_by_ref = 0;
11812 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11813 chk->rec.chunk_id.can_take_data = 0;
11815 chk->asoc = &stcb->asoc;
11816 chk->book_size = sizeof(struct sctp_chunkhdr);
11817 chk->send_size = SCTP_SIZE32(chk->book_size);
11818 chk->book_size_scale = 0;
11819 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11820 if (chk->data == NULL) {
11821 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11822 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11825 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11826 /* setup chunk parameters */
11827 chk->sent = SCTP_DATAGRAM_UNSENT;
11828 chk->snd_count = 0;
11829 if (stcb->asoc.alternate) {
11830 chk->whoTo = stcb->asoc.alternate;
11832 chk->whoTo = stcb->asoc.primary_destination;
11834 ch = mtod(chk->data, struct sctp_chunkhdr *);
11835 ch->chunk_type = SCTP_STREAM_RESET;
11836 ch->chunk_flags = 0;
11837 ch->chunk_length = htons(chk->book_size);
11838 atomic_add_int(&chk->whoTo->ref_count, 1);
11839 SCTP_BUF_LEN(chk->data) = chk->send_size;
11840 sctp_add_stream_reset_result(chk, ent->seq, response);
11841 /* insert the chunk for sending */
11842 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11845 asoc->ctrl_queue_cnt++;
11849 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11850 uint32_t resp_seq, uint32_t result,
11851 uint32_t send_una, uint32_t recv_next)
11853 uint16_t len, old_len;
11854 struct sctp_stream_reset_response_tsn *resp;
11855 struct sctp_chunkhdr *ch;
11857 ch = mtod(chk->data, struct sctp_chunkhdr *);
11858 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11860 /* get to new offset for the param. */
11861 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11862 /* now how long will this param be? */
11863 len = sizeof(struct sctp_stream_reset_response_tsn);
11864 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11865 resp->ph.param_length = htons(len);
11866 resp->response_seq = htonl(resp_seq);
11867 resp->result = htonl(result);
11868 resp->senders_next_tsn = htonl(send_una);
11869 resp->receivers_next_tsn = htonl(recv_next);
11871 /* now fix the chunk length */
11872 ch->chunk_length = htons(len + old_len);
11873 chk->book_size = len + old_len;
11874 chk->send_size = SCTP_SIZE32(chk->book_size);
11875 chk->book_size_scale = 0;
11876 SCTP_BUF_LEN(chk->data) = chk->send_size;
11881 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11885 uint16_t len, old_len;
11886 struct sctp_chunkhdr *ch;
11887 struct sctp_stream_reset_add_strm *addstr;
11889 ch = mtod(chk->data, struct sctp_chunkhdr *);
11890 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11892 /* get to new offset for the param. */
11893 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11894 /* now how long will this param be? */
11895 len = sizeof(struct sctp_stream_reset_add_strm);
11898 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11899 addstr->ph.param_length = htons(len);
11900 addstr->request_seq = htonl(seq);
11901 addstr->number_of_streams = htons(adding);
11902 addstr->reserved = 0;
11904 /* now fix the chunk length */
11905 ch->chunk_length = htons(len + old_len);
11906 chk->send_size = len + old_len;
11907 chk->book_size = SCTP_SIZE32(chk->send_size);
11908 chk->book_size_scale = 0;
11909 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11914 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11918 uint16_t len, old_len;
11919 struct sctp_chunkhdr *ch;
11920 struct sctp_stream_reset_add_strm *addstr;
11922 ch = mtod(chk->data, struct sctp_chunkhdr *);
11923 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11925 /* get to new offset for the param. */
11926 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11927 /* now how long will this param be? */
11928 len = sizeof(struct sctp_stream_reset_add_strm);
11930 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11931 addstr->ph.param_length = htons(len);
11932 addstr->request_seq = htonl(seq);
11933 addstr->number_of_streams = htons(adding);
11934 addstr->reserved = 0;
11936 /* now fix the chunk length */
11937 ch->chunk_length = htons(len + old_len);
11938 chk->send_size = len + old_len;
11939 chk->book_size = SCTP_SIZE32(chk->send_size);
11940 chk->book_size_scale = 0;
11941 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11946 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11948 struct sctp_association *asoc;
11949 struct sctp_tmit_chunk *chk;
11950 struct sctp_chunkhdr *ch;
11953 asoc = &stcb->asoc;
11954 asoc->trigger_reset = 0;
11955 if (asoc->stream_reset_outstanding) {
11958 sctp_alloc_a_chunk(stcb, chk);
11960 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11963 chk->copy_by_ref = 0;
11964 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11965 chk->rec.chunk_id.can_take_data = 0;
11967 chk->asoc = &stcb->asoc;
11968 chk->book_size = sizeof(struct sctp_chunkhdr);
11969 chk->send_size = SCTP_SIZE32(chk->book_size);
11970 chk->book_size_scale = 0;
11971 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11972 if (chk->data == NULL) {
11973 sctp_free_a_chunk(stcb, chk, so_locked);
11974 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11977 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11979 /* setup chunk parameters */
11980 chk->sent = SCTP_DATAGRAM_UNSENT;
11981 chk->snd_count = 0;
11982 if (stcb->asoc.alternate) {
11983 chk->whoTo = stcb->asoc.alternate;
11985 chk->whoTo = stcb->asoc.primary_destination;
11987 ch = mtod(chk->data, struct sctp_chunkhdr *);
11988 ch->chunk_type = SCTP_STREAM_RESET;
11989 ch->chunk_flags = 0;
11990 ch->chunk_length = htons(chk->book_size);
11991 atomic_add_int(&chk->whoTo->ref_count, 1);
11992 SCTP_BUF_LEN(chk->data) = chk->send_size;
11993 seq = stcb->asoc.str_reset_seq_out;
11994 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
11996 asoc->stream_reset_outstanding++;
11998 m_freem(chk->data);
12000 sctp_free_a_chunk(stcb, chk, so_locked);
12003 asoc->str_reset = chk;
12004 /* insert the chunk for sending */
12005 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12008 asoc->ctrl_queue_cnt++;
12010 if (stcb->asoc.send_sack) {
12011 sctp_send_sack(stcb, so_locked);
12013 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12018 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12019 uint16_t number_entries, uint16_t *list,
12020 uint8_t send_in_req,
12021 uint8_t send_tsn_req,
12022 uint8_t add_stream,
12024 uint16_t adding_i, uint8_t peer_asked)
12026 struct sctp_association *asoc;
12027 struct sctp_tmit_chunk *chk;
12028 struct sctp_chunkhdr *ch;
12029 int can_send_out_req = 0;
12032 asoc = &stcb->asoc;
12033 if (asoc->stream_reset_outstanding) {
12035 * Already one pending, must get ACK back to clear the flag.
12037 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12040 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12041 (add_stream == 0)) {
12042 /* nothing to do */
12043 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12046 if (send_tsn_req && send_in_req) {
12047 /* error, can't do that */
12048 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12050 } else if (send_in_req) {
12051 can_send_out_req = 1;
12053 if (number_entries > (MCLBYTES -
12054 SCTP_MIN_OVERHEAD -
12055 sizeof(struct sctp_chunkhdr) -
12056 sizeof(struct sctp_stream_reset_out_request)) /
12057 sizeof(uint16_t)) {
12058 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12061 sctp_alloc_a_chunk(stcb, chk);
12063 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12066 chk->copy_by_ref = 0;
12067 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12068 chk->rec.chunk_id.can_take_data = 0;
12070 chk->asoc = &stcb->asoc;
12071 chk->book_size = sizeof(struct sctp_chunkhdr);
12072 chk->send_size = SCTP_SIZE32(chk->book_size);
12073 chk->book_size_scale = 0;
12074 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12075 if (chk->data == NULL) {
12076 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12077 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12080 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12082 /* setup chunk parameters */
12083 chk->sent = SCTP_DATAGRAM_UNSENT;
12084 chk->snd_count = 0;
12085 if (stcb->asoc.alternate) {
12086 chk->whoTo = stcb->asoc.alternate;
12088 chk->whoTo = stcb->asoc.primary_destination;
12090 atomic_add_int(&chk->whoTo->ref_count, 1);
12091 ch = mtod(chk->data, struct sctp_chunkhdr *);
12092 ch->chunk_type = SCTP_STREAM_RESET;
12093 ch->chunk_flags = 0;
12094 ch->chunk_length = htons(chk->book_size);
12095 SCTP_BUF_LEN(chk->data) = chk->send_size;
12097 seq = stcb->asoc.str_reset_seq_out;
12098 if (can_send_out_req) {
12101 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12104 asoc->stream_reset_outstanding++;
12107 if ((add_stream & 1) &&
12108 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12109 /* Need to allocate more */
12110 struct sctp_stream_out *oldstream;
12111 struct sctp_stream_queue_pending *sp, *nsp;
12113 #if defined(SCTP_DETAILED_STR_STATS)
12117 oldstream = stcb->asoc.strmout;
12118 /* get some more */
12119 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12120 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12122 if (stcb->asoc.strmout == NULL) {
12125 stcb->asoc.strmout = oldstream;
12126 /* Turn off the bit */
12127 x = add_stream & 0xfe;
12132 * Ok now we proceed with copying the old out stuff and
12133 * initializing the new stuff.
12135 SCTP_TCB_SEND_LOCK(stcb);
12136 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12137 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12138 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12139 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12140 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12141 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12142 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12143 stcb->asoc.strmout[i].sid = i;
12144 stcb->asoc.strmout[i].state = oldstream[i].state;
12145 /* FIX ME FIX ME */
12147 * This should be a SS_COPY operation FIX ME STREAM
12150 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12151 /* now anything on those queues? */
12152 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12153 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12154 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12157 /* now the new streams */
12158 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12159 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12160 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12161 stcb->asoc.strmout[i].chunks_on_queues = 0;
12162 #if defined(SCTP_DETAILED_STR_STATS)
12163 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12164 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12165 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12168 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12169 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12171 stcb->asoc.strmout[i].next_mid_ordered = 0;
12172 stcb->asoc.strmout[i].next_mid_unordered = 0;
12173 stcb->asoc.strmout[i].sid = i;
12174 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12175 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12176 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12178 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12179 SCTP_FREE(oldstream, SCTP_M_STRMO);
12180 SCTP_TCB_SEND_UNLOCK(stcb);
12183 if ((add_stream & 1) && (adding_o > 0)) {
12184 asoc->strm_pending_add_size = adding_o;
12185 asoc->peer_req_out = peer_asked;
12186 sctp_add_an_out_stream(chk, seq, adding_o);
12188 asoc->stream_reset_outstanding++;
12190 if ((add_stream & 2) && (adding_i > 0)) {
12191 sctp_add_an_in_stream(chk, seq, adding_i);
12193 asoc->stream_reset_outstanding++;
12196 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12198 asoc->stream_reset_outstanding++;
12200 if (send_tsn_req) {
12201 sctp_add_stream_reset_tsn(chk, seq);
12202 asoc->stream_reset_outstanding++;
12204 asoc->str_reset = chk;
12205 /* insert the chunk for sending */
12206 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12209 asoc->ctrl_queue_cnt++;
12210 if (stcb->asoc.send_sack) {
12211 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12213 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12218 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12219 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12220 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12221 uint32_t vrf_id, uint16_t port)
12223 /* Don't respond to an ABORT with an ABORT. */
12224 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12226 sctp_m_freem(cause);
12229 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12230 mflowtype, mflowid, fibnum,
12236 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12237 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12238 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12239 uint32_t vrf_id, uint16_t port)
12241 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12242 mflowtype, mflowid, fibnum,
12247 static struct mbuf *
12248 sctp_copy_resume(struct uio *uio,
12250 int user_marks_eor,
12253 struct mbuf **new_tail)
12257 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12258 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12260 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12263 *sndout = m_length(m, NULL);
12264 *new_tail = m_last(m);
12270 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12274 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12276 if (sp->data == NULL) {
12277 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12281 sp->tail_mbuf = m_last(sp->data);
12285 static struct sctp_stream_queue_pending *
12286 sctp_copy_it_in(struct sctp_tcb *stcb,
12287 struct sctp_association *asoc,
12288 struct sctp_sndrcvinfo *srcv,
12290 struct sctp_nets *net,
12291 ssize_t max_send_len,
12292 int user_marks_eor,
12297 * This routine must be very careful in its work. Protocol
12298 * processing is up and running so care must be taken to spl...()
12299 * when you need to do something that may effect the stcb/asoc. The
12300 * sb is locked however. When data is copied the protocol processing
12301 * should be enabled since this is a slower operation...
12303 struct sctp_stream_queue_pending *sp = NULL;
12307 /* Now can we send this? */
12308 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12309 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12310 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12311 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12312 /* got data while shutting down */
12313 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12314 *error = ECONNRESET;
12317 sctp_alloc_a_strmoq(stcb, sp);
12319 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12324 sp->sender_all_done = 0;
12325 sp->sinfo_flags = srcv->sinfo_flags;
12326 sp->timetolive = srcv->sinfo_timetolive;
12327 sp->ppid = srcv->sinfo_ppid;
12328 sp->context = srcv->sinfo_context;
12330 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12332 sp->sid = srcv->sinfo_stream;
12333 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12334 if ((sp->length == (uint32_t)uio->uio_resid) &&
12335 ((user_marks_eor == 0) ||
12336 (srcv->sinfo_flags & SCTP_EOF) ||
12337 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12338 sp->msg_is_complete = 1;
12340 sp->msg_is_complete = 0;
12342 sp->sender_all_done = 0;
12343 sp->some_taken = 0;
12344 sp->put_last_out = 0;
12345 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12346 sp->data = sp->tail_mbuf = NULL;
12347 if (sp->length == 0) {
12350 if (srcv->sinfo_keynumber_valid) {
12351 sp->auth_keyid = srcv->sinfo_keynumber;
12353 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12355 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12356 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12357 sp->holds_key_ref = 1;
12359 *error = sctp_copy_one(sp, uio, resv_in_first);
12362 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12365 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12367 atomic_add_int(&sp->net->ref_count, 1);
12371 sctp_set_prsctp_policy(sp);
12378 sctp_sosend(struct socket *so,
12379 struct sockaddr *addr,
12382 struct mbuf *control,
12387 int error, use_sndinfo = 0;
12388 struct sctp_sndrcvinfo sndrcvninfo;
12389 struct sockaddr *addr_to_use;
12390 #if defined(INET) && defined(INET6)
12391 struct sockaddr_in sin;
12395 /* process cmsg snd/rcv info (maybe a assoc-id) */
12396 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12397 sizeof(sndrcvninfo))) {
12402 addr_to_use = addr;
12403 #if defined(INET) && defined(INET6)
12404 if ((addr) && (addr->sa_family == AF_INET6)) {
12405 struct sockaddr_in6 *sin6;
12407 sin6 = (struct sockaddr_in6 *)addr;
12408 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12409 in6_sin6_2_sin(&sin, sin6);
12410 addr_to_use = (struct sockaddr *)&sin;
12414 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12417 use_sndinfo ? &sndrcvninfo : NULL
12424 sctp_lower_sosend(struct socket *so,
12425 struct sockaddr *addr,
12427 struct mbuf *i_pak,
12428 struct mbuf *control,
12430 struct sctp_sndrcvinfo *srcv
12435 struct epoch_tracker et;
12436 ssize_t sndlen = 0, max_len, local_add_more;
12438 struct mbuf *top = NULL;
12439 int queue_only = 0, queue_only_for_init = 0;
12440 int free_cnt_applied = 0;
12442 int now_filled = 0;
12443 unsigned int inqueue_bytes = 0;
12444 struct sctp_block_entry be;
12445 struct sctp_inpcb *inp;
12446 struct sctp_tcb *stcb = NULL;
12447 struct timeval now;
12448 struct sctp_nets *net;
12449 struct sctp_association *asoc;
12450 struct sctp_inpcb *t_inp;
12451 int user_marks_eor;
12452 int create_lock_applied = 0;
12453 int nagle_applies = 0;
12454 int some_on_control = 0;
12455 int got_all_of_the_send = 0;
12456 int hold_tcblock = 0;
12457 int non_blocking = 0;
12458 ssize_t local_soresv = 0;
12460 uint16_t sinfo_flags;
12461 sctp_assoc_t sinfo_assoc_id;
12468 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12470 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12473 SCTP_RELEASE_PKT(i_pak);
12477 if ((uio == NULL) && (i_pak == NULL)) {
12478 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12481 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12482 atomic_add_int(&inp->total_sends, 1);
12484 if (uio->uio_resid < 0) {
12485 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12488 sndlen = uio->uio_resid;
12490 top = SCTP_HEADER_TO_CHAIN(i_pak);
12491 sndlen = SCTP_HEADER_LEN(i_pak);
12493 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %zd\n",
12496 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12497 SCTP_IS_LISTENING(inp)) {
12498 /* The listener can NOT send */
12499 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12504 * Pre-screen address, if one is given the sin-len
12505 * must be set correctly!
12508 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12510 switch (raddr->sa.sa_family) {
12513 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12514 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12518 port = raddr->sin.sin_port;
12523 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12524 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12528 port = raddr->sin6.sin6_port;
12532 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12533 error = EAFNOSUPPORT;
12540 sinfo_flags = srcv->sinfo_flags;
12541 sinfo_assoc_id = srcv->sinfo_assoc_id;
12542 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12543 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12544 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12548 if (srcv->sinfo_flags)
12549 SCTP_STAT_INCR(sctps_sends_with_flags);
12551 sinfo_flags = inp->def_send.sinfo_flags;
12552 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12554 if (flags & MSG_EOR) {
12555 sinfo_flags |= SCTP_EOR;
12557 if (flags & MSG_EOF) {
12558 sinfo_flags |= SCTP_EOF;
12560 if (sinfo_flags & SCTP_SENDALL) {
12561 /* its a sendall */
12562 error = sctp_sendall(inp, uio, top, srcv);
12566 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12567 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12571 /* now we must find the assoc */
12572 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12573 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12574 SCTP_INP_RLOCK(inp);
12575 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12577 SCTP_TCB_LOCK(stcb);
12580 SCTP_INP_RUNLOCK(inp);
12581 } else if (sinfo_assoc_id) {
12582 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12583 if (stcb != NULL) {
12588 * Since we did not use findep we must
12589 * increment it, and if we don't find a tcb
12592 SCTP_INP_WLOCK(inp);
12593 SCTP_INP_INCR_REF(inp);
12594 SCTP_INP_WUNLOCK(inp);
12595 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12596 if (stcb == NULL) {
12597 SCTP_INP_WLOCK(inp);
12598 SCTP_INP_DECR_REF(inp);
12599 SCTP_INP_WUNLOCK(inp);
12604 if ((stcb == NULL) && (addr)) {
12605 /* Possible implicit send? */
12606 SCTP_ASOC_CREATE_LOCK(inp);
12607 create_lock_applied = 1;
12608 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12609 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12610 /* Should I really unlock ? */
12611 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12615 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12616 (addr->sa_family == AF_INET6)) {
12617 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12621 SCTP_INP_WLOCK(inp);
12622 SCTP_INP_INCR_REF(inp);
12623 SCTP_INP_WUNLOCK(inp);
12624 /* With the lock applied look again */
12625 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12626 #if defined(INET) || defined(INET6)
12627 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12628 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12631 if (stcb == NULL) {
12632 SCTP_INP_WLOCK(inp);
12633 SCTP_INP_DECR_REF(inp);
12634 SCTP_INP_WUNLOCK(inp);
12641 if (t_inp != inp) {
12642 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12647 if (stcb == NULL) {
12648 if (addr == NULL) {
12649 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12653 /* We must go ahead and start the INIT process */
12656 if ((sinfo_flags & SCTP_ABORT) ||
12657 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12659 * User asks to abort a non-existant assoc,
12660 * or EOF a non-existant assoc with no data
12662 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12666 /* get an asoc/stcb struct */
12667 vrf_id = inp->def_vrf_id;
12669 if (create_lock_applied == 0) {
12670 panic("Error, should hold create lock and I don't?");
12673 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12674 inp->sctp_ep.pre_open_stream_count,
12677 SCTP_INITIALIZE_AUTH_PARAMS);
12678 if (stcb == NULL) {
12679 /* Error is setup for us in the call */
12682 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12683 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12685 * Set the connected flag so we can queue
12688 soisconnecting(so);
12691 if (create_lock_applied) {
12692 SCTP_ASOC_CREATE_UNLOCK(inp);
12693 create_lock_applied = 0;
12695 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12698 * Turn on queue only flag to prevent data from
12702 asoc = &stcb->asoc;
12703 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
12704 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12707 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12708 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12709 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
12715 /* out with the INIT */
12716 queue_only_for_init = 1;
12718 * we may want to dig in after this call and adjust the MTU
12719 * value. It defaulted to 1500 (constant) but the ro
12720 * structure may now have an update and thus we may need to
12721 * change it BEFORE we append the message.
12725 asoc = &stcb->asoc;
12726 if (srcv == NULL) {
12727 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12728 sinfo_flags = srcv->sinfo_flags;
12729 if (flags & MSG_EOR) {
12730 sinfo_flags |= SCTP_EOR;
12732 if (flags & MSG_EOF) {
12733 sinfo_flags |= SCTP_EOF;
12736 if (sinfo_flags & SCTP_ADDR_OVER) {
12738 net = sctp_findnet(stcb, addr);
12741 if ((net == NULL) ||
12742 ((port != 0) && (port != stcb->rport))) {
12743 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12748 if (stcb->asoc.alternate) {
12749 net = stcb->asoc.alternate;
12751 net = stcb->asoc.primary_destination;
12754 atomic_add_int(&stcb->total_sends, 1);
12755 /* Keep the stcb from being freed under our feet */
12756 atomic_add_int(&asoc->refcnt, 1);
12757 free_cnt_applied = 1;
12759 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12760 if (sndlen > (ssize_t)asoc->smallest_mtu) {
12761 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12766 if (SCTP_SO_IS_NBIO(so)
12767 || (flags & (MSG_NBIO | MSG_DONTWAIT)) != 0
12771 /* would we block? */
12772 if (non_blocking) {
12775 if (hold_tcblock == 0) {
12776 SCTP_TCB_LOCK(stcb);
12779 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12780 if (user_marks_eor == 0) {
12785 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12786 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12787 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12788 if (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(so))
12791 error = EWOULDBLOCK;
12794 stcb->asoc.sb_send_resv += (uint32_t)sndlen;
12795 SCTP_TCB_UNLOCK(stcb);
12798 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12800 local_soresv = sndlen;
12801 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12802 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12803 error = ECONNRESET;
12806 if (create_lock_applied) {
12807 SCTP_ASOC_CREATE_UNLOCK(inp);
12808 create_lock_applied = 0;
12810 /* Is the stream no. valid? */
12811 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12812 /* Invalid stream number */
12813 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12817 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12818 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12820 * Can't queue any data while stream reset is underway.
12822 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12827 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12830 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12831 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12834 /* we are now done with all control */
12836 sctp_m_freem(control);
12839 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_SENT) ||
12840 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12841 (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12842 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12843 if (sinfo_flags & SCTP_ABORT) {
12846 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12847 error = ECONNRESET;
12851 /* Ok, we will attempt a msgsnd :> */
12853 p->td_ru.ru_msgsnd++;
12855 /* Are we aborting? */
12856 if (sinfo_flags & SCTP_ABORT) {
12858 ssize_t tot_demand, tot_out = 0, max_out;
12860 SCTP_STAT_INCR(sctps_sends_with_abort);
12861 if ((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) ||
12862 (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) {
12863 /* It has to be up before we abort */
12864 /* how big is the user initiated abort? */
12865 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12869 if (hold_tcblock) {
12870 SCTP_TCB_UNLOCK(stcb);
12874 struct mbuf *cntm = NULL;
12876 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12878 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12879 tot_out += SCTP_BUF_LEN(cntm);
12883 /* Must fit in a MTU */
12885 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12886 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12888 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12892 mm = sctp_get_mbuf_for_msg((unsigned int)tot_demand, 0, M_WAITOK, 1, MT_DATA);
12895 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12899 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12900 max_out -= sizeof(struct sctp_abort_msg);
12901 if (tot_out > max_out) {
12905 struct sctp_paramhdr *ph;
12907 /* now move forward the data pointer */
12908 ph = mtod(mm, struct sctp_paramhdr *);
12909 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12910 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12912 SCTP_BUF_LEN(mm) = (int)(tot_out + sizeof(struct sctp_paramhdr));
12914 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12917 * Here if we can't get his data we
12918 * still abort we just don't get to
12919 * send the users note :-0
12926 SCTP_BUF_NEXT(mm) = top;
12930 if (hold_tcblock == 0) {
12931 SCTP_TCB_LOCK(stcb);
12933 atomic_add_int(&stcb->asoc.refcnt, -1);
12934 free_cnt_applied = 0;
12935 /* release this lock, otherwise we hang on ourselves */
12936 NET_EPOCH_ENTER(et);
12937 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12938 NET_EPOCH_EXIT(et);
12939 /* now relock the stcb so everything is sane */
12943 * In this case top is already chained to mm avoid double
12944 * free, since we free it below if top != NULL and driver
12945 * would free it after sending the packet out
12952 /* Calculate the maximum we can send */
12953 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12954 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12955 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12959 if (hold_tcblock) {
12960 SCTP_TCB_UNLOCK(stcb);
12963 if (asoc->strmout == NULL) {
12964 /* huh? software error */
12965 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12970 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12971 if ((user_marks_eor == 0) &&
12972 (sndlen > (ssize_t)SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12973 /* It will NEVER fit */
12974 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12978 if ((uio == NULL) && user_marks_eor) {
12980 * We do not support eeor mode for
12981 * sending with mbuf chains (like sendfile).
12983 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12988 if (user_marks_eor) {
12989 local_add_more = (ssize_t)min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12992 * For non-eeor the whole message must fit in
12993 * the socket send buffer.
12995 local_add_more = sndlen;
12998 if (non_blocking) {
12999 goto skip_preblock;
13001 if (((max_len <= local_add_more) &&
13002 ((ssize_t)SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13004 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13005 /* No room right now ! */
13006 SOCKBUF_LOCK(&so->so_snd);
13007 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13008 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13009 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13010 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %zd) || (%d+%d > %d)\n",
13011 (unsigned int)SCTP_SB_LIMIT_SND(so),
13014 stcb->asoc.stream_queue_cnt,
13015 stcb->asoc.chunks_on_out_queue,
13016 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13017 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13018 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13021 stcb->block_entry = &be;
13022 error = sbwait(&so->so_snd);
13023 stcb->block_entry = NULL;
13024 if (error || so->so_error || be.error) {
13027 error = so->so_error;
13032 SOCKBUF_UNLOCK(&so->so_snd);
13035 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13036 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13037 asoc, stcb->asoc.total_output_queue_size);
13039 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13040 SOCKBUF_UNLOCK(&so->so_snd);
13043 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13045 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13046 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13050 SOCKBUF_UNLOCK(&so->so_snd);
13054 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13058 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13059 * case NOTE: uio will be null when top/mbuf is passed
13062 if (sinfo_flags & SCTP_EOF) {
13063 got_all_of_the_send = 1;
13066 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13072 struct sctp_stream_queue_pending *sp;
13073 struct sctp_stream_out *strm;
13076 SCTP_TCB_SEND_LOCK(stcb);
13077 if ((asoc->stream_locked) &&
13078 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13079 SCTP_TCB_SEND_UNLOCK(stcb);
13080 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13084 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13085 if (strm->last_msg_incomplete == 0) {
13087 SCTP_TCB_SEND_UNLOCK(stcb);
13088 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13092 SCTP_TCB_SEND_LOCK(stcb);
13093 if (sp->msg_is_complete) {
13094 strm->last_msg_incomplete = 0;
13095 asoc->stream_locked = 0;
13098 * Just got locked to this guy in case of an
13101 strm->last_msg_incomplete = 1;
13102 if (stcb->asoc.idata_supported == 0) {
13103 asoc->stream_locked = 1;
13104 asoc->stream_locked_on = srcv->sinfo_stream;
13106 sp->sender_all_done = 0;
13108 sctp_snd_sb_alloc(stcb, sp->length);
13109 atomic_add_int(&asoc->stream_queue_cnt, 1);
13110 if (sinfo_flags & SCTP_UNORDERED) {
13111 SCTP_STAT_INCR(sctps_sends_with_unord);
13113 sp->processing = 1;
13114 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13115 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13117 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13119 /* ???? Huh ??? last msg is gone */
13121 panic("Warning: Last msg marked incomplete, yet nothing left?");
13123 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13124 strm->last_msg_incomplete = 0;
13128 if (sp->processing) {
13129 SCTP_TCB_SEND_UNLOCK(stcb);
13130 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13134 sp->processing = 1;
13137 SCTP_TCB_SEND_UNLOCK(stcb);
13138 while (uio->uio_resid > 0) {
13139 /* How much room do we have? */
13140 struct mbuf *new_tail, *mm;
13142 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13143 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13144 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13148 if ((max_len > (ssize_t)SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13149 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13150 (uio->uio_resid && (uio->uio_resid <= max_len))) {
13153 if (hold_tcblock) {
13154 SCTP_TCB_UNLOCK(stcb);
13157 mm = sctp_copy_resume(uio, (int)max_len, user_marks_eor, &error, &sndout, &new_tail);
13158 if ((mm == NULL) || error) {
13162 SCTP_TCB_SEND_LOCK(stcb);
13164 sp->processing = 0;
13166 SCTP_TCB_SEND_UNLOCK(stcb);
13169 /* Update the mbuf and count */
13170 SCTP_TCB_SEND_LOCK(stcb);
13171 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13172 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13174 * we need to get out. Peer probably
13178 if (stcb->asoc.state & SCTP_STATE_WAS_ABORTED) {
13179 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13180 error = ECONNRESET;
13183 sp->processing = 0;
13185 SCTP_TCB_SEND_UNLOCK(stcb);
13188 if (sp->tail_mbuf) {
13189 /* tack it to the end */
13190 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13191 sp->tail_mbuf = new_tail;
13193 /* A stolen mbuf */
13195 sp->tail_mbuf = new_tail;
13197 sctp_snd_sb_alloc(stcb, sndout);
13198 atomic_add_int(&sp->length, sndout);
13200 if (sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13201 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13204 /* Did we reach EOR? */
13205 if ((uio->uio_resid == 0) &&
13206 ((user_marks_eor == 0) ||
13207 (sinfo_flags & SCTP_EOF) ||
13208 (user_marks_eor && (sinfo_flags & SCTP_EOR)))) {
13209 sp->msg_is_complete = 1;
13211 sp->msg_is_complete = 0;
13213 SCTP_TCB_SEND_UNLOCK(stcb);
13215 if (uio->uio_resid == 0) {
13220 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13222 * This is ugly but we must assure locking
13225 if (hold_tcblock == 0) {
13226 SCTP_TCB_LOCK(stcb);
13229 sctp_prune_prsctp(stcb, asoc, srcv, (int)sndlen);
13230 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13231 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13232 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13238 SCTP_TCB_UNLOCK(stcb);
13241 /* wait for space now */
13242 if (non_blocking) {
13243 /* Non-blocking io in place out */
13244 SCTP_TCB_SEND_LOCK(stcb);
13246 sp->processing = 0;
13248 SCTP_TCB_SEND_UNLOCK(stcb);
13251 /* What about the INIT, send it maybe */
13252 if (queue_only_for_init) {
13253 if (hold_tcblock == 0) {
13254 SCTP_TCB_LOCK(stcb);
13257 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13258 /* a collision took us forward? */
13261 NET_EPOCH_ENTER(et);
13262 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13263 NET_EPOCH_EXIT(et);
13264 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13268 if ((net->flight_size > net->cwnd) &&
13269 (asoc->sctp_cmt_on_off == 0)) {
13270 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13272 } else if (asoc->ifp_had_enobuf) {
13273 SCTP_STAT_INCR(sctps_ifnomemqueued);
13274 if (net->flight_size > (2 * net->mtu)) {
13277 asoc->ifp_had_enobuf = 0;
13279 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13280 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13281 (stcb->asoc.total_flight > 0) &&
13282 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13283 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13285 * Ok, Nagle is set on and we have data outstanding.
13286 * Don't send anything and let SACKs drive out the
13287 * data unless we have a "full" segment to send.
13289 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13290 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13292 SCTP_STAT_INCR(sctps_naglequeued);
13295 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13296 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13297 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13299 SCTP_STAT_INCR(sctps_naglesent);
13302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13303 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13304 nagle_applies, un_sent);
13305 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13306 stcb->asoc.total_flight,
13307 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13309 if (queue_only_for_init)
13310 queue_only_for_init = 0;
13311 if ((queue_only == 0) && (nagle_applies == 0)) {
13313 * need to start chunk output
13314 * before blocking.. note that if
13315 * a lock is already applied, then
13316 * the input via the net is happening
13317 * and I don't need to start output :-D
13319 NET_EPOCH_ENTER(et);
13320 if (hold_tcblock == 0) {
13321 if (SCTP_TCB_TRYLOCK(stcb)) {
13323 sctp_chunk_output(inp,
13325 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13328 sctp_chunk_output(inp,
13330 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13332 NET_EPOCH_EXIT(et);
13334 if (hold_tcblock == 1) {
13335 SCTP_TCB_UNLOCK(stcb);
13338 SOCKBUF_LOCK(&so->so_snd);
13340 * This is a bit strange, but I think it will
13341 * work. The total_output_queue_size is locked and
13342 * protected by the TCB_LOCK, which we just released.
13343 * There is a race that can occur between releasing it
13344 * above, and me getting the socket lock, where sacks
13345 * come in but we have not put the SB_WAIT on the
13346 * so_snd buffer to get the wakeup. After the LOCK
13347 * is applied the sack_processing will also need to
13348 * LOCK the so->so_snd to do the actual sowwakeup(). So
13349 * once we have the socket buffer lock if we recheck the
13350 * size we KNOW we will get to sleep safely with the
13351 * wakeup flag in place.
13353 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13354 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13355 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13356 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13357 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13358 asoc, uio->uio_resid);
13361 stcb->block_entry = &be;
13362 error = sbwait(&so->so_snd);
13363 stcb->block_entry = NULL;
13365 if (error || so->so_error || be.error) {
13368 error = so->so_error;
13373 SOCKBUF_UNLOCK(&so->so_snd);
13374 SCTP_TCB_SEND_LOCK(stcb);
13376 sp->processing = 0;
13378 SCTP_TCB_SEND_UNLOCK(stcb);
13382 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13383 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13384 asoc, stcb->asoc.total_output_queue_size);
13387 SOCKBUF_UNLOCK(&so->so_snd);
13388 SCTP_TCB_SEND_LOCK(stcb);
13389 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13391 sp->processing = 0;
13393 SCTP_TCB_SEND_UNLOCK(stcb);
13396 SCTP_TCB_SEND_UNLOCK(stcb);
13398 SCTP_TCB_SEND_LOCK(stcb);
13399 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) ||
13400 (stcb->asoc.state & SCTP_STATE_WAS_ABORTED)) {
13401 SCTP_TCB_SEND_UNLOCK(stcb);
13405 if (sp->msg_is_complete == 0) {
13406 strm->last_msg_incomplete = 1;
13407 if (stcb->asoc.idata_supported == 0) {
13408 asoc->stream_locked = 1;
13409 asoc->stream_locked_on = srcv->sinfo_stream;
13412 sp->sender_all_done = 1;
13413 strm->last_msg_incomplete = 0;
13414 asoc->stream_locked = 0;
13416 sp->processing = 0;
13418 SCTP_PRINTF("Huh no sp TSNH?\n");
13419 strm->last_msg_incomplete = 0;
13420 asoc->stream_locked = 0;
13422 SCTP_TCB_SEND_UNLOCK(stcb);
13423 if (uio->uio_resid == 0) {
13424 got_all_of_the_send = 1;
13427 /* We send in a 0, since we do NOT have any locks */
13428 error = sctp_msg_append(stcb, net, top, srcv, 0);
13430 if (sinfo_flags & SCTP_EOF) {
13431 got_all_of_the_send = 1;
13439 if ((sinfo_flags & SCTP_EOF) &&
13440 (got_all_of_the_send == 1)) {
13441 SCTP_STAT_INCR(sctps_sends_with_eof);
13443 if (hold_tcblock == 0) {
13444 SCTP_TCB_LOCK(stcb);
13447 if (TAILQ_EMPTY(&asoc->send_queue) &&
13448 TAILQ_EMPTY(&asoc->sent_queue) &&
13449 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13450 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13453 /* there is nothing queued to send, so I'm done... */
13454 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13455 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13456 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13457 struct sctp_nets *netp;
13459 /* only send SHUTDOWN the first time through */
13460 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13461 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13463 SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT);
13464 sctp_stop_timers_for_shutdown(stcb);
13465 if (stcb->asoc.alternate) {
13466 netp = stcb->asoc.alternate;
13468 netp = stcb->asoc.primary_destination;
13470 sctp_send_shutdown(stcb, netp);
13471 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13473 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13478 * we still got (or just got) data to send, so set
13482 * XXX sockets draft says that SCTP_EOF should be
13483 * sent with no data. currently, we will allow user
13484 * data to be sent first and move to
13487 if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) &&
13488 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13489 (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13490 if (hold_tcblock == 0) {
13491 SCTP_TCB_LOCK(stcb);
13494 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13495 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT);
13497 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING);
13498 if (TAILQ_EMPTY(&asoc->send_queue) &&
13499 TAILQ_EMPTY(&asoc->sent_queue) &&
13500 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13501 struct mbuf *op_err;
13502 char msg[SCTP_DIAG_INFO_LEN];
13505 if (free_cnt_applied) {
13506 atomic_add_int(&stcb->asoc.refcnt, -1);
13507 free_cnt_applied = 0;
13509 SCTP_SNPRINTF(msg, sizeof(msg),
13510 "%s:%d at %s", __FILE__, __LINE__, __func__);
13511 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13513 NET_EPOCH_ENTER(et);
13514 sctp_abort_an_association(stcb->sctp_ep, stcb,
13515 op_err, SCTP_SO_LOCKED);
13516 NET_EPOCH_EXIT(et);
13518 * now relock the stcb so everything
13525 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13527 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13532 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13533 some_on_control = 1;
13535 if (queue_only_for_init) {
13536 if (hold_tcblock == 0) {
13537 SCTP_TCB_LOCK(stcb);
13540 if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) {
13541 /* a collision took us forward? */
13544 NET_EPOCH_ENTER(et);
13545 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13546 NET_EPOCH_EXIT(et);
13547 SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT);
13551 if ((net->flight_size > net->cwnd) &&
13552 (stcb->asoc.sctp_cmt_on_off == 0)) {
13553 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13555 } else if (asoc->ifp_had_enobuf) {
13556 SCTP_STAT_INCR(sctps_ifnomemqueued);
13557 if (net->flight_size > (2 * net->mtu)) {
13560 asoc->ifp_had_enobuf = 0;
13562 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13563 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13564 (stcb->asoc.total_flight > 0) &&
13565 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13566 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13568 * Ok, Nagle is set on and we have data outstanding.
13569 * Don't send anything and let SACKs drive out the
13570 * data unless wen have a "full" segment to send.
13572 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13573 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13575 SCTP_STAT_INCR(sctps_naglequeued);
13578 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13579 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13580 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13582 SCTP_STAT_INCR(sctps_naglesent);
13585 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13586 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13587 nagle_applies, un_sent);
13588 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13589 stcb->asoc.total_flight,
13590 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13592 NET_EPOCH_ENTER(et);
13593 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13594 /* we can attempt to send too. */
13595 if (hold_tcblock == 0) {
13597 * If there is activity recv'ing sacks no need to
13600 if (SCTP_TCB_TRYLOCK(stcb)) {
13601 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13605 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13607 } else if ((queue_only == 0) &&
13608 (stcb->asoc.peers_rwnd == 0) &&
13609 (stcb->asoc.total_flight == 0)) {
13610 /* We get to have a probe outstanding */
13611 if (hold_tcblock == 0) {
13613 SCTP_TCB_LOCK(stcb);
13615 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13616 } else if (some_on_control) {
13617 int num_out, reason, frag_point;
13619 /* Here we do control only */
13620 if (hold_tcblock == 0) {
13622 SCTP_TCB_LOCK(stcb);
13624 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13625 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13626 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13628 NET_EPOCH_EXIT(et);
13629 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13630 queue_only, stcb->asoc.peers_rwnd, un_sent,
13631 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13632 stcb->asoc.total_output_queue_size, error);
13637 if (local_soresv && stcb) {
13638 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13640 if (create_lock_applied) {
13641 SCTP_ASOC_CREATE_UNLOCK(inp);
13643 if ((stcb) && hold_tcblock) {
13644 SCTP_TCB_UNLOCK(stcb);
13646 if (stcb && free_cnt_applied) {
13647 atomic_add_int(&stcb->asoc.refcnt, -1);
13651 if (mtx_owned(&stcb->tcb_mtx)) {
13652 panic("Leaving with tcb mtx owned?");
13654 if (mtx_owned(&stcb->tcb_send_mtx)) {
13655 panic("Leaving with tcb send mtx owned?");
13663 sctp_m_freem(control);
13669 * generate an AUTHentication chunk, if required
13672 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13673 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13674 struct sctp_tcb *stcb, uint8_t chunk)
13676 struct mbuf *m_auth;
13677 struct sctp_auth_chunk *auth;
13681 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13685 if (stcb->asoc.auth_supported == 0) {
13688 /* does the requested chunk require auth? */
13689 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13692 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13693 if (m_auth == NULL) {
13697 /* reserve some space if this will be the first mbuf */
13699 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13700 /* fill in the AUTH chunk details */
13701 auth = mtod(m_auth, struct sctp_auth_chunk *);
13702 memset(auth, 0, sizeof(*auth));
13703 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13704 auth->ch.chunk_flags = 0;
13705 chunk_len = sizeof(*auth) +
13706 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13707 auth->ch.chunk_length = htons(chunk_len);
13708 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13709 /* key id and hmac digest will be computed and filled in upon send */
13711 /* save the offset where the auth was inserted into the chain */
13713 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13714 *offset += SCTP_BUF_LEN(cn);
13717 /* update length and return pointer to the auth chunk */
13718 SCTP_BUF_LEN(m_auth) = chunk_len;
13719 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13720 if (auth_ret != NULL)
13728 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13730 struct nd_prefix *pfx = NULL;
13731 struct nd_pfxrouter *pfxrtr = NULL;
13732 struct sockaddr_in6 gw6;
13734 if (ro == NULL || ro->ro_nh == NULL || src6->sin6_family != AF_INET6)
13737 /* get prefix entry of address */
13739 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13740 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13742 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13743 &src6->sin6_addr, &pfx->ndpr_mask))
13746 /* no prefix entry in the prefix list */
13749 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13750 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13754 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13755 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13757 /* search installed gateway from prefix entry */
13758 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13759 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13760 gw6.sin6_family = AF_INET6;
13761 gw6.sin6_len = sizeof(struct sockaddr_in6);
13762 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13763 sizeof(struct in6_addr));
13764 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13765 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13766 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13767 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13768 if (sctp_cmpaddr((struct sockaddr *)&gw6, &ro->ro_nh->gw_sa)) {
13770 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13775 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13781 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13784 struct sockaddr_in *sin, *mask;
13785 struct ifaddr *ifa;
13786 struct in_addr srcnetaddr, gwnetaddr;
13788 if (ro == NULL || ro->ro_nh == NULL ||
13789 sifa->address.sa.sa_family != AF_INET) {
13792 ifa = (struct ifaddr *)sifa->ifa;
13793 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13794 sin = &sifa->address.sin;
13795 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13796 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13797 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13798 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13800 sin = &ro->ro_nh->gw4_sa;
13801 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13802 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13803 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ro->ro_nh->gw_sa);
13804 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13805 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {