2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_pcb.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_uio.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_indata.h>
52 #include <netinet/sctp_bsd_addr.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_crc32.h>
55 #if defined(INET) || defined(INET6)
56 #include <netinet/udp.h>
58 #include <netinet/udp_var.h>
59 #include <machine/in_cksum.h>
63 #define SCTP_MAX_GAPS_INARRAY 4
65 uint8_t right_edge; /* mergable on the right edge */
66 uint8_t left_edge; /* mergable on the left edge */
69 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
72 const struct sack_track sack_array[256] = {
73 {0, 0, 0, 0, /* 0x00 */
80 {1, 0, 1, 0, /* 0x01 */
87 {0, 0, 1, 0, /* 0x02 */
94 {1, 0, 1, 0, /* 0x03 */
101 {0, 0, 1, 0, /* 0x04 */
108 {1, 0, 2, 0, /* 0x05 */
115 {0, 0, 1, 0, /* 0x06 */
122 {1, 0, 1, 0, /* 0x07 */
129 {0, 0, 1, 0, /* 0x08 */
136 {1, 0, 2, 0, /* 0x09 */
143 {0, 0, 2, 0, /* 0x0a */
150 {1, 0, 2, 0, /* 0x0b */
157 {0, 0, 1, 0, /* 0x0c */
164 {1, 0, 2, 0, /* 0x0d */
171 {0, 0, 1, 0, /* 0x0e */
178 {1, 0, 1, 0, /* 0x0f */
185 {0, 0, 1, 0, /* 0x10 */
192 {1, 0, 2, 0, /* 0x11 */
199 {0, 0, 2, 0, /* 0x12 */
206 {1, 0, 2, 0, /* 0x13 */
213 {0, 0, 2, 0, /* 0x14 */
220 {1, 0, 3, 0, /* 0x15 */
227 {0, 0, 2, 0, /* 0x16 */
234 {1, 0, 2, 0, /* 0x17 */
241 {0, 0, 1, 0, /* 0x18 */
248 {1, 0, 2, 0, /* 0x19 */
255 {0, 0, 2, 0, /* 0x1a */
262 {1, 0, 2, 0, /* 0x1b */
269 {0, 0, 1, 0, /* 0x1c */
276 {1, 0, 2, 0, /* 0x1d */
283 {0, 0, 1, 0, /* 0x1e */
290 {1, 0, 1, 0, /* 0x1f */
297 {0, 0, 1, 0, /* 0x20 */
304 {1, 0, 2, 0, /* 0x21 */
311 {0, 0, 2, 0, /* 0x22 */
318 {1, 0, 2, 0, /* 0x23 */
325 {0, 0, 2, 0, /* 0x24 */
332 {1, 0, 3, 0, /* 0x25 */
339 {0, 0, 2, 0, /* 0x26 */
346 {1, 0, 2, 0, /* 0x27 */
353 {0, 0, 2, 0, /* 0x28 */
360 {1, 0, 3, 0, /* 0x29 */
367 {0, 0, 3, 0, /* 0x2a */
374 {1, 0, 3, 0, /* 0x2b */
381 {0, 0, 2, 0, /* 0x2c */
388 {1, 0, 3, 0, /* 0x2d */
395 {0, 0, 2, 0, /* 0x2e */
402 {1, 0, 2, 0, /* 0x2f */
409 {0, 0, 1, 0, /* 0x30 */
416 {1, 0, 2, 0, /* 0x31 */
423 {0, 0, 2, 0, /* 0x32 */
430 {1, 0, 2, 0, /* 0x33 */
437 {0, 0, 2, 0, /* 0x34 */
444 {1, 0, 3, 0, /* 0x35 */
451 {0, 0, 2, 0, /* 0x36 */
458 {1, 0, 2, 0, /* 0x37 */
465 {0, 0, 1, 0, /* 0x38 */
472 {1, 0, 2, 0, /* 0x39 */
479 {0, 0, 2, 0, /* 0x3a */
486 {1, 0, 2, 0, /* 0x3b */
493 {0, 0, 1, 0, /* 0x3c */
500 {1, 0, 2, 0, /* 0x3d */
507 {0, 0, 1, 0, /* 0x3e */
514 {1, 0, 1, 0, /* 0x3f */
521 {0, 0, 1, 0, /* 0x40 */
528 {1, 0, 2, 0, /* 0x41 */
535 {0, 0, 2, 0, /* 0x42 */
542 {1, 0, 2, 0, /* 0x43 */
549 {0, 0, 2, 0, /* 0x44 */
556 {1, 0, 3, 0, /* 0x45 */
563 {0, 0, 2, 0, /* 0x46 */
570 {1, 0, 2, 0, /* 0x47 */
577 {0, 0, 2, 0, /* 0x48 */
584 {1, 0, 3, 0, /* 0x49 */
591 {0, 0, 3, 0, /* 0x4a */
598 {1, 0, 3, 0, /* 0x4b */
605 {0, 0, 2, 0, /* 0x4c */
612 {1, 0, 3, 0, /* 0x4d */
619 {0, 0, 2, 0, /* 0x4e */
626 {1, 0, 2, 0, /* 0x4f */
633 {0, 0, 2, 0, /* 0x50 */
640 {1, 0, 3, 0, /* 0x51 */
647 {0, 0, 3, 0, /* 0x52 */
654 {1, 0, 3, 0, /* 0x53 */
661 {0, 0, 3, 0, /* 0x54 */
668 {1, 0, 4, 0, /* 0x55 */
675 {0, 0, 3, 0, /* 0x56 */
682 {1, 0, 3, 0, /* 0x57 */
689 {0, 0, 2, 0, /* 0x58 */
696 {1, 0, 3, 0, /* 0x59 */
703 {0, 0, 3, 0, /* 0x5a */
710 {1, 0, 3, 0, /* 0x5b */
717 {0, 0, 2, 0, /* 0x5c */
724 {1, 0, 3, 0, /* 0x5d */
731 {0, 0, 2, 0, /* 0x5e */
738 {1, 0, 2, 0, /* 0x5f */
745 {0, 0, 1, 0, /* 0x60 */
752 {1, 0, 2, 0, /* 0x61 */
759 {0, 0, 2, 0, /* 0x62 */
766 {1, 0, 2, 0, /* 0x63 */
773 {0, 0, 2, 0, /* 0x64 */
780 {1, 0, 3, 0, /* 0x65 */
787 {0, 0, 2, 0, /* 0x66 */
794 {1, 0, 2, 0, /* 0x67 */
801 {0, 0, 2, 0, /* 0x68 */
808 {1, 0, 3, 0, /* 0x69 */
815 {0, 0, 3, 0, /* 0x6a */
822 {1, 0, 3, 0, /* 0x6b */
829 {0, 0, 2, 0, /* 0x6c */
836 {1, 0, 3, 0, /* 0x6d */
843 {0, 0, 2, 0, /* 0x6e */
850 {1, 0, 2, 0, /* 0x6f */
857 {0, 0, 1, 0, /* 0x70 */
864 {1, 0, 2, 0, /* 0x71 */
871 {0, 0, 2, 0, /* 0x72 */
878 {1, 0, 2, 0, /* 0x73 */
885 {0, 0, 2, 0, /* 0x74 */
892 {1, 0, 3, 0, /* 0x75 */
899 {0, 0, 2, 0, /* 0x76 */
906 {1, 0, 2, 0, /* 0x77 */
913 {0, 0, 1, 0, /* 0x78 */
920 {1, 0, 2, 0, /* 0x79 */
927 {0, 0, 2, 0, /* 0x7a */
934 {1, 0, 2, 0, /* 0x7b */
941 {0, 0, 1, 0, /* 0x7c */
948 {1, 0, 2, 0, /* 0x7d */
955 {0, 0, 1, 0, /* 0x7e */
962 {1, 0, 1, 0, /* 0x7f */
969 {0, 1, 1, 0, /* 0x80 */
976 {1, 1, 2, 0, /* 0x81 */
983 {0, 1, 2, 0, /* 0x82 */
990 {1, 1, 2, 0, /* 0x83 */
997 {0, 1, 2, 0, /* 0x84 */
1004 {1, 1, 3, 0, /* 0x85 */
1011 {0, 1, 2, 0, /* 0x86 */
1018 {1, 1, 2, 0, /* 0x87 */
1025 {0, 1, 2, 0, /* 0x88 */
1032 {1, 1, 3, 0, /* 0x89 */
1039 {0, 1, 3, 0, /* 0x8a */
1046 {1, 1, 3, 0, /* 0x8b */
1053 {0, 1, 2, 0, /* 0x8c */
1060 {1, 1, 3, 0, /* 0x8d */
1067 {0, 1, 2, 0, /* 0x8e */
1074 {1, 1, 2, 0, /* 0x8f */
1081 {0, 1, 2, 0, /* 0x90 */
1088 {1, 1, 3, 0, /* 0x91 */
1095 {0, 1, 3, 0, /* 0x92 */
1102 {1, 1, 3, 0, /* 0x93 */
1109 {0, 1, 3, 0, /* 0x94 */
1116 {1, 1, 4, 0, /* 0x95 */
1123 {0, 1, 3, 0, /* 0x96 */
1130 {1, 1, 3, 0, /* 0x97 */
1137 {0, 1, 2, 0, /* 0x98 */
1144 {1, 1, 3, 0, /* 0x99 */
1151 {0, 1, 3, 0, /* 0x9a */
1158 {1, 1, 3, 0, /* 0x9b */
1165 {0, 1, 2, 0, /* 0x9c */
1172 {1, 1, 3, 0, /* 0x9d */
1179 {0, 1, 2, 0, /* 0x9e */
1186 {1, 1, 2, 0, /* 0x9f */
1193 {0, 1, 2, 0, /* 0xa0 */
1200 {1, 1, 3, 0, /* 0xa1 */
1207 {0, 1, 3, 0, /* 0xa2 */
1214 {1, 1, 3, 0, /* 0xa3 */
1221 {0, 1, 3, 0, /* 0xa4 */
1228 {1, 1, 4, 0, /* 0xa5 */
1235 {0, 1, 3, 0, /* 0xa6 */
1242 {1, 1, 3, 0, /* 0xa7 */
1249 {0, 1, 3, 0, /* 0xa8 */
1256 {1, 1, 4, 0, /* 0xa9 */
1263 {0, 1, 4, 0, /* 0xaa */
1270 {1, 1, 4, 0, /* 0xab */
1277 {0, 1, 3, 0, /* 0xac */
1284 {1, 1, 4, 0, /* 0xad */
1291 {0, 1, 3, 0, /* 0xae */
1298 {1, 1, 3, 0, /* 0xaf */
1305 {0, 1, 2, 0, /* 0xb0 */
1312 {1, 1, 3, 0, /* 0xb1 */
1319 {0, 1, 3, 0, /* 0xb2 */
1326 {1, 1, 3, 0, /* 0xb3 */
1333 {0, 1, 3, 0, /* 0xb4 */
1340 {1, 1, 4, 0, /* 0xb5 */
1347 {0, 1, 3, 0, /* 0xb6 */
1354 {1, 1, 3, 0, /* 0xb7 */
1361 {0, 1, 2, 0, /* 0xb8 */
1368 {1, 1, 3, 0, /* 0xb9 */
1375 {0, 1, 3, 0, /* 0xba */
1382 {1, 1, 3, 0, /* 0xbb */
1389 {0, 1, 2, 0, /* 0xbc */
1396 {1, 1, 3, 0, /* 0xbd */
1403 {0, 1, 2, 0, /* 0xbe */
1410 {1, 1, 2, 0, /* 0xbf */
1417 {0, 1, 1, 0, /* 0xc0 */
1424 {1, 1, 2, 0, /* 0xc1 */
1431 {0, 1, 2, 0, /* 0xc2 */
1438 {1, 1, 2, 0, /* 0xc3 */
1445 {0, 1, 2, 0, /* 0xc4 */
1452 {1, 1, 3, 0, /* 0xc5 */
1459 {0, 1, 2, 0, /* 0xc6 */
1466 {1, 1, 2, 0, /* 0xc7 */
1473 {0, 1, 2, 0, /* 0xc8 */
1480 {1, 1, 3, 0, /* 0xc9 */
1487 {0, 1, 3, 0, /* 0xca */
1494 {1, 1, 3, 0, /* 0xcb */
1501 {0, 1, 2, 0, /* 0xcc */
1508 {1, 1, 3, 0, /* 0xcd */
1515 {0, 1, 2, 0, /* 0xce */
1522 {1, 1, 2, 0, /* 0xcf */
1529 {0, 1, 2, 0, /* 0xd0 */
1536 {1, 1, 3, 0, /* 0xd1 */
1543 {0, 1, 3, 0, /* 0xd2 */
1550 {1, 1, 3, 0, /* 0xd3 */
1557 {0, 1, 3, 0, /* 0xd4 */
1564 {1, 1, 4, 0, /* 0xd5 */
1571 {0, 1, 3, 0, /* 0xd6 */
1578 {1, 1, 3, 0, /* 0xd7 */
1585 {0, 1, 2, 0, /* 0xd8 */
1592 {1, 1, 3, 0, /* 0xd9 */
1599 {0, 1, 3, 0, /* 0xda */
1606 {1, 1, 3, 0, /* 0xdb */
1613 {0, 1, 2, 0, /* 0xdc */
1620 {1, 1, 3, 0, /* 0xdd */
1627 {0, 1, 2, 0, /* 0xde */
1634 {1, 1, 2, 0, /* 0xdf */
1641 {0, 1, 1, 0, /* 0xe0 */
1648 {1, 1, 2, 0, /* 0xe1 */
1655 {0, 1, 2, 0, /* 0xe2 */
1662 {1, 1, 2, 0, /* 0xe3 */
1669 {0, 1, 2, 0, /* 0xe4 */
1676 {1, 1, 3, 0, /* 0xe5 */
1683 {0, 1, 2, 0, /* 0xe6 */
1690 {1, 1, 2, 0, /* 0xe7 */
1697 {0, 1, 2, 0, /* 0xe8 */
1704 {1, 1, 3, 0, /* 0xe9 */
1711 {0, 1, 3, 0, /* 0xea */
1718 {1, 1, 3, 0, /* 0xeb */
1725 {0, 1, 2, 0, /* 0xec */
1732 {1, 1, 3, 0, /* 0xed */
1739 {0, 1, 2, 0, /* 0xee */
1746 {1, 1, 2, 0, /* 0xef */
1753 {0, 1, 1, 0, /* 0xf0 */
1760 {1, 1, 2, 0, /* 0xf1 */
1767 {0, 1, 2, 0, /* 0xf2 */
1774 {1, 1, 2, 0, /* 0xf3 */
1781 {0, 1, 2, 0, /* 0xf4 */
1788 {1, 1, 3, 0, /* 0xf5 */
1795 {0, 1, 2, 0, /* 0xf6 */
1802 {1, 1, 2, 0, /* 0xf7 */
1809 {0, 1, 1, 0, /* 0xf8 */
1816 {1, 1, 2, 0, /* 0xf9 */
1823 {0, 1, 2, 0, /* 0xfa */
1830 {1, 1, 2, 0, /* 0xfb */
1837 {0, 1, 1, 0, /* 0xfc */
1844 {1, 1, 2, 0, /* 0xfd */
1851 {0, 1, 1, 0, /* 0xfe */
1858 {1, 1, 1, 0, /* 0xff */
1869 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1870 struct sctp_scoping *scope,
1873 if ((scope->loopback_scope == 0) &&
1874 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1876 * skip loopback if not in scope *
1880 switch (ifa->address.sa.sa_family) {
1883 if (scope->ipv4_addr_legal) {
1884 struct sockaddr_in *sin;
1886 sin = &ifa->address.sin;
1887 if (sin->sin_addr.s_addr == 0) {
1888 /* not in scope , unspecified */
1891 if ((scope->ipv4_local_scope == 0) &&
1892 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1893 /* private address not in scope */
1903 if (scope->ipv6_addr_legal) {
1904 struct sockaddr_in6 *sin6;
1907 * Must update the flags, bummer, which means any
1908 * IFA locks must now be applied HERE <->
1911 sctp_gather_internal_ifa_flags(ifa);
1913 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1916 /* ok to use deprecated addresses? */
1917 sin6 = &ifa->address.sin6;
1918 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1919 /* skip unspecifed addresses */
1922 if ( /* (local_scope == 0) && */
1923 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1926 if ((scope->site_scope == 0) &&
1927 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1941 static struct mbuf *
1942 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t *len)
1944 #if defined(INET) || defined(INET6)
1945 struct sctp_paramhdr *paramh;
1950 switch (ifa->address.sa.sa_family) {
1953 plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
1958 plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
1964 #if defined(INET) || defined(INET6)
1965 if (M_TRAILINGSPACE(m) >= plen) {
1966 /* easy side we just drop it on the end */
1967 paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1970 /* Need more space */
1972 while (SCTP_BUF_NEXT(mret) != NULL) {
1973 mret = SCTP_BUF_NEXT(mret);
1975 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1976 if (SCTP_BUF_NEXT(mret) == NULL) {
1977 /* We are hosed, can't add more addresses */
1980 mret = SCTP_BUF_NEXT(mret);
1981 paramh = mtod(mret, struct sctp_paramhdr *);
1983 /* now add the parameter */
1984 switch (ifa->address.sa.sa_family) {
1988 struct sctp_ipv4addr_param *ipv4p;
1989 struct sockaddr_in *sin;
1991 sin = &ifa->address.sin;
1992 ipv4p = (struct sctp_ipv4addr_param *)paramh;
1993 paramh->param_type = htons(SCTP_IPV4_ADDRESS);
1994 paramh->param_length = htons(plen);
1995 ipv4p->addr = sin->sin_addr.s_addr;
1996 SCTP_BUF_LEN(mret) += plen;
2003 struct sctp_ipv6addr_param *ipv6p;
2004 struct sockaddr_in6 *sin6;
2006 sin6 = &ifa->address.sin6;
2007 ipv6p = (struct sctp_ipv6addr_param *)paramh;
2008 paramh->param_type = htons(SCTP_IPV6_ADDRESS);
2009 paramh->param_length = htons(plen);
2010 memcpy(ipv6p->addr, &sin6->sin6_addr,
2011 sizeof(ipv6p->addr));
2012 /* clear embedded scope in the address */
2013 in6_clearscope((struct in6_addr *)ipv6p->addr);
2014 SCTP_BUF_LEN(mret) += plen;
2030 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2031 struct sctp_scoping *scope,
2032 struct mbuf *m_at, int cnt_inits_to,
2033 uint16_t *padding_len, uint16_t *chunk_len)
2035 struct sctp_vrf *vrf = NULL;
2036 int cnt, limit_out = 0, total_count;
2039 vrf_id = inp->def_vrf_id;
2040 SCTP_IPI_ADDR_RLOCK();
2041 vrf = sctp_find_vrf(vrf_id);
2043 SCTP_IPI_ADDR_RUNLOCK();
2046 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2047 struct sctp_ifa *sctp_ifap;
2048 struct sctp_ifn *sctp_ifnp;
2051 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2053 cnt = SCTP_ADDRESS_LIMIT;
2056 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2057 if ((scope->loopback_scope == 0) &&
2058 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2060 * Skip loopback devices if loopback_scope
2065 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2067 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2068 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2069 &sctp_ifap->address.sin.sin_addr) != 0)) {
2074 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2075 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2076 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2080 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2083 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2087 if (cnt > SCTP_ADDRESS_LIMIT) {
2091 if (cnt > SCTP_ADDRESS_LIMIT) {
2098 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2100 if ((scope->loopback_scope == 0) &&
2101 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2103 * Skip loopback devices if
2104 * loopback_scope not set
2108 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2110 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2111 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2112 &sctp_ifap->address.sin.sin_addr) != 0)) {
2117 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2118 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2119 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2123 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2126 if (sctp_is_address_in_scope(sctp_ifap,
2130 if ((chunk_len != NULL) &&
2131 (padding_len != NULL) &&
2132 (*padding_len > 0)) {
2133 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2134 SCTP_BUF_LEN(m_at) += *padding_len;
2135 *chunk_len += *padding_len;
2138 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2149 if (total_count > SCTP_ADDRESS_LIMIT) {
2150 /* No more addresses */
2158 struct sctp_laddr *laddr;
2161 /* First, how many ? */
2162 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2163 if (laddr->ifa == NULL) {
2166 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2168 * Address being deleted by the system, dont
2172 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2174 * Address being deleted on this ep don't
2179 if (sctp_is_address_in_scope(laddr->ifa,
2186 * To get through a NAT we only list addresses if we have
2187 * more than one. That way if you just bind a single address
2188 * we let the source of the init dictate our address.
2192 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2193 if (laddr->ifa == NULL) {
2196 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2199 if (sctp_is_address_in_scope(laddr->ifa,
2203 if ((chunk_len != NULL) &&
2204 (padding_len != NULL) &&
2205 (*padding_len > 0)) {
2206 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2207 SCTP_BUF_LEN(m_at) += *padding_len;
2208 *chunk_len += *padding_len;
2211 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2213 if (cnt >= SCTP_ADDRESS_LIMIT) {
2219 SCTP_IPI_ADDR_RUNLOCK();
2223 static struct sctp_ifa *
2224 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2225 uint8_t dest_is_loop,
2226 uint8_t dest_is_priv,
2229 uint8_t dest_is_global = 0;
2231 /* dest_is_priv is true if destination is a private address */
2232 /* dest_is_loop is true if destination is a loopback addresses */
2235 * Here we determine if its a preferred address. A preferred address
2236 * means it is the same scope or higher scope then the destination.
2237 * L = loopback, P = private, G = global
2238 * -----------------------------------------
2239 * src | dest | result
2240 * ----------------------------------------
2242 * -----------------------------------------
2243 * P | L | yes-v4 no-v6
2244 * -----------------------------------------
2245 * G | L | yes-v4 no-v6
2246 * -----------------------------------------
2248 * -----------------------------------------
2250 * -----------------------------------------
2252 * -----------------------------------------
2254 * -----------------------------------------
2256 * -----------------------------------------
2258 * -----------------------------------------
2261 if (ifa->address.sa.sa_family != fam) {
2262 /* forget mis-matched family */
2265 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2268 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2269 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2270 /* Ok the address may be ok */
2272 if (fam == AF_INET6) {
2273 /* ok to use deprecated addresses? no lets not! */
2274 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2275 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2278 if (ifa->src_is_priv && !ifa->src_is_loop) {
2280 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2284 if (ifa->src_is_glob) {
2286 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2293 * Now that we know what is what, implement or table this could in
2294 * theory be done slicker (it used to be), but this is
2295 * straightforward and easier to validate :-)
2297 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2298 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2299 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2300 dest_is_loop, dest_is_priv, dest_is_global);
2302 if ((ifa->src_is_loop) && (dest_is_priv)) {
2303 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2306 if ((ifa->src_is_glob) && (dest_is_priv)) {
2307 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2310 if ((ifa->src_is_loop) && (dest_is_global)) {
2311 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2314 if ((ifa->src_is_priv) && (dest_is_global)) {
2315 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2318 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2319 /* its a preferred address */
2323 static struct sctp_ifa *
2324 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2325 uint8_t dest_is_loop,
2326 uint8_t dest_is_priv,
2329 uint8_t dest_is_global = 0;
2332 * Here we determine if its a acceptable address. A acceptable
2333 * address means it is the same scope or higher scope but we can
2334 * allow for NAT which means its ok to have a global dest and a
2337 * L = loopback, P = private, G = global
2338 * -----------------------------------------
2339 * src | dest | result
2340 * -----------------------------------------
2342 * -----------------------------------------
2343 * P | L | yes-v4 no-v6
2344 * -----------------------------------------
2346 * -----------------------------------------
2348 * -----------------------------------------
2350 * -----------------------------------------
2351 * G | P | yes - May not work
2352 * -----------------------------------------
2354 * -----------------------------------------
2355 * P | G | yes - May not work
2356 * -----------------------------------------
2358 * -----------------------------------------
2361 if (ifa->address.sa.sa_family != fam) {
2362 /* forget non matching family */
2363 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2364 ifa->address.sa.sa_family, fam);
2367 /* Ok the address may be ok */
2368 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2369 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2370 dest_is_loop, dest_is_priv);
2371 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2375 if (fam == AF_INET6) {
2376 /* ok to use deprecated addresses? */
2377 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2380 if (ifa->src_is_priv) {
2381 /* Special case, linklocal to loop */
2388 * Now that we know what is what, implement our table. This could in
2389 * theory be done slicker (it used to be), but this is
2390 * straightforward and easier to validate :-)
2392 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2395 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2398 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2401 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2404 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2405 /* its an acceptable address */
2410 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2412 struct sctp_laddr *laddr;
2415 /* There are no restrictions, no TCB :-) */
2418 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2419 if (laddr->ifa == NULL) {
2420 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2424 if (laddr->ifa == ifa) {
2425 /* Yes it is on the list */
2434 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2436 struct sctp_laddr *laddr;
2440 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2441 if (laddr->ifa == NULL) {
2442 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2446 if ((laddr->ifa == ifa) && laddr->action == 0)
2455 static struct sctp_ifa *
2456 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2459 int non_asoc_addr_ok,
2460 uint8_t dest_is_priv,
2461 uint8_t dest_is_loop,
2464 struct sctp_laddr *laddr, *starting_point;
2467 struct sctp_ifn *sctp_ifn;
2468 struct sctp_ifa *sctp_ifa, *sifa;
2469 struct sctp_vrf *vrf;
2472 vrf = sctp_find_vrf(vrf_id);
2476 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2477 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2478 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2480 * first question, is the ifn we will emit on in our list, if so, we
2481 * want such an address. Note that we first looked for a preferred
2485 /* is a preferred one on the interface we route out? */
2486 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2488 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2489 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2490 &sctp_ifa->address.sin.sin_addr) != 0)) {
2495 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2496 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2497 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2501 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2502 (non_asoc_addr_ok == 0))
2504 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2509 if (sctp_is_addr_in_ep(inp, sifa)) {
2510 atomic_add_int(&sifa->refcount, 1);
2516 * ok, now we now need to find one on the list of the addresses. We
2517 * can't get one on the emitting interface so let's find first a
2518 * preferred one. If not that an acceptable one otherwise... we
2521 starting_point = inp->next_addr_touse;
2523 if (inp->next_addr_touse == NULL) {
2524 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2527 for (laddr = inp->next_addr_touse; laddr;
2528 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2529 if (laddr->ifa == NULL) {
2530 /* address has been removed */
2533 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2534 /* address is being deleted */
2537 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2541 atomic_add_int(&sifa->refcount, 1);
2544 if (resettotop == 0) {
2545 inp->next_addr_touse = NULL;
2548 inp->next_addr_touse = starting_point;
2551 if (inp->next_addr_touse == NULL) {
2552 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2555 /* ok, what about an acceptable address in the inp */
2556 for (laddr = inp->next_addr_touse; laddr;
2557 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2558 if (laddr->ifa == NULL) {
2559 /* address has been removed */
2562 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2563 /* address is being deleted */
2566 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2570 atomic_add_int(&sifa->refcount, 1);
2573 if (resettotop == 0) {
2574 inp->next_addr_touse = NULL;
2575 goto once_again_too;
2578 * no address bound can be a source for the destination we are in
2586 static struct sctp_ifa *
2587 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2588 struct sctp_tcb *stcb,
2591 uint8_t dest_is_priv,
2592 uint8_t dest_is_loop,
2593 int non_asoc_addr_ok,
2596 struct sctp_laddr *laddr, *starting_point;
2598 struct sctp_ifn *sctp_ifn;
2599 struct sctp_ifa *sctp_ifa, *sifa;
2600 uint8_t start_at_beginning = 0;
2601 struct sctp_vrf *vrf;
2605 * first question, is the ifn we will emit on in our list, if so, we
2608 vrf = sctp_find_vrf(vrf_id);
2612 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2613 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2614 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2617 * first question, is the ifn we will emit on in our list? If so,
2618 * we want that one. First we look for a preferred. Second, we go
2619 * for an acceptable.
2622 /* first try for a preferred address on the ep */
2623 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2625 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2626 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2627 &sctp_ifa->address.sin.sin_addr) != 0)) {
2632 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2633 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2634 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2638 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2640 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2641 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2644 if (((non_asoc_addr_ok == 0) &&
2645 (sctp_is_addr_restricted(stcb, sifa))) ||
2646 (non_asoc_addr_ok &&
2647 (sctp_is_addr_restricted(stcb, sifa)) &&
2648 (!sctp_is_addr_pending(stcb, sifa)))) {
2649 /* on the no-no list */
2652 atomic_add_int(&sifa->refcount, 1);
2656 /* next try for an acceptable address on the ep */
2657 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2659 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2660 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2661 &sctp_ifa->address.sin.sin_addr) != 0)) {
2666 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2667 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2668 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2672 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2674 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2675 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2678 if (((non_asoc_addr_ok == 0) &&
2679 (sctp_is_addr_restricted(stcb, sifa))) ||
2680 (non_asoc_addr_ok &&
2681 (sctp_is_addr_restricted(stcb, sifa)) &&
2682 (!sctp_is_addr_pending(stcb, sifa)))) {
2683 /* on the no-no list */
2686 atomic_add_int(&sifa->refcount, 1);
2693 * if we can't find one like that then we must look at all addresses
2694 * bound to pick one at first preferable then secondly acceptable.
2696 starting_point = stcb->asoc.last_used_address;
2698 if (stcb->asoc.last_used_address == NULL) {
2699 start_at_beginning = 1;
2700 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2702 /* search beginning with the last used address */
2703 for (laddr = stcb->asoc.last_used_address; laddr;
2704 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2705 if (laddr->ifa == NULL) {
2706 /* address has been removed */
2709 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2710 /* address is being deleted */
2713 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2716 if (((non_asoc_addr_ok == 0) &&
2717 (sctp_is_addr_restricted(stcb, sifa))) ||
2718 (non_asoc_addr_ok &&
2719 (sctp_is_addr_restricted(stcb, sifa)) &&
2720 (!sctp_is_addr_pending(stcb, sifa)))) {
2721 /* on the no-no list */
2724 stcb->asoc.last_used_address = laddr;
2725 atomic_add_int(&sifa->refcount, 1);
2728 if (start_at_beginning == 0) {
2729 stcb->asoc.last_used_address = NULL;
2730 goto sctp_from_the_top;
2732 /* now try for any higher scope than the destination */
2733 stcb->asoc.last_used_address = starting_point;
2734 start_at_beginning = 0;
2736 if (stcb->asoc.last_used_address == NULL) {
2737 start_at_beginning = 1;
2738 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2740 /* search beginning with the last used address */
2741 for (laddr = stcb->asoc.last_used_address; laddr;
2742 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2743 if (laddr->ifa == NULL) {
2744 /* address has been removed */
2747 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2748 /* address is being deleted */
2751 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2755 if (((non_asoc_addr_ok == 0) &&
2756 (sctp_is_addr_restricted(stcb, sifa))) ||
2757 (non_asoc_addr_ok &&
2758 (sctp_is_addr_restricted(stcb, sifa)) &&
2759 (!sctp_is_addr_pending(stcb, sifa)))) {
2760 /* on the no-no list */
2763 stcb->asoc.last_used_address = laddr;
2764 atomic_add_int(&sifa->refcount, 1);
2767 if (start_at_beginning == 0) {
2768 stcb->asoc.last_used_address = NULL;
2769 goto sctp_from_the_top2;
2774 static struct sctp_ifa *
2775 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2776 struct sctp_inpcb *inp,
2777 struct sctp_tcb *stcb,
2778 int non_asoc_addr_ok,
2779 uint8_t dest_is_loop,
2780 uint8_t dest_is_priv,
2786 struct sctp_ifa *ifa, *sifa;
2787 int num_eligible_addr = 0;
2789 struct sockaddr_in6 sin6, lsa6;
2791 if (fam == AF_INET6) {
2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2793 (void)sa6_recoverscope(&sin6);
2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2798 if ((ifa->address.sa.sa_family == AF_INET) &&
2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin.sin_addr) != 0)) {
2805 if ((ifa->address.sa.sa_family == AF_INET6) &&
2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2807 &ifa->address.sin6.sin6_addr) != 0)) {
2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2812 (non_asoc_addr_ok == 0))
2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2819 if (fam == AF_INET6 &&
2821 sifa->src_is_loop && sifa->src_is_priv) {
2823 * don't allow fe80::1 to be a src on loop ::1, we
2824 * don't list it to the peer so we will get an
2829 if (fam == AF_INET6 &&
2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2833 * link-local <-> link-local must belong to the same
2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2837 (void)sa6_recoverscope(&lsa6);
2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2845 * Check if the IPv6 address matches to next-hop. In the
2846 * mobile case, old IPv6 address may be not deleted from the
2847 * interface. Then, the interface has previous and new
2848 * addresses. We should use one corresponding to the
2849 * next-hop. (by micchie)
2852 if (stcb && fam == AF_INET6 &&
2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2861 /* Avoid topologically incorrect IPv4 address */
2862 if (stcb && fam == AF_INET &&
2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2873 if (((non_asoc_addr_ok == 0) &&
2874 (sctp_is_addr_restricted(stcb, sifa))) ||
2875 (non_asoc_addr_ok &&
2876 (sctp_is_addr_restricted(stcb, sifa)) &&
2877 (!sctp_is_addr_pending(stcb, sifa)))) {
2879 * It is restricted for some reason..
2880 * probably not yet added.
2885 if (num_eligible_addr >= addr_wanted) {
2888 num_eligible_addr++;
2895 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2896 struct sctp_inpcb *inp,
2897 struct sctp_tcb *stcb,
2898 int non_asoc_addr_ok,
2899 uint8_t dest_is_loop,
2900 uint8_t dest_is_priv,
2903 struct sctp_ifa *ifa, *sifa;
2904 int num_eligible_addr = 0;
2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2908 if ((ifa->address.sa.sa_family == AF_INET) &&
2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin.sin_addr) != 0)) {
2915 if ((ifa->address.sa.sa_family == AF_INET6) &&
2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2918 &ifa->address.sin6.sin6_addr) != 0)) {
2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2923 (non_asoc_addr_ok == 0)) {
2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2935 if (((non_asoc_addr_ok == 0) &&
2936 (sctp_is_addr_restricted(stcb, sifa))) ||
2937 (non_asoc_addr_ok &&
2938 (sctp_is_addr_restricted(stcb, sifa)) &&
2939 (!sctp_is_addr_pending(stcb, sifa)))) {
2941 * It is restricted for some reason..
2942 * probably not yet added.
2947 num_eligible_addr++;
2949 return (num_eligible_addr);
2952 static struct sctp_ifa *
2953 sctp_choose_boundall(struct sctp_inpcb *inp,
2954 struct sctp_tcb *stcb,
2955 struct sctp_nets *net,
2958 uint8_t dest_is_priv,
2959 uint8_t dest_is_loop,
2960 int non_asoc_addr_ok,
2963 int cur_addr_num = 0, num_preferred = 0;
2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2966 struct sctp_ifa *sctp_ifa, *sifa;
2968 struct sctp_vrf *vrf;
2974 * For boundall we can use any address in the association.
2975 * If non_asoc_addr_ok is set we can use any address (at least in
2976 * theory). So we look for preferred addresses first. If we find one,
2977 * we use it. Otherwise we next try to get an address on the
2978 * interface, which we should be able to do (unless non_asoc_addr_ok
2979 * is false and we are routed out that way). In these cases where we
2980 * can't use the address of the interface we go through all the
2981 * ifn's looking for an address we can use and fill that in. Punting
2982 * means we send back address 0, which will probably cause problems
2983 * actually since then IP will fill in the address of the route ifn,
2984 * which means we probably already rejected it.. i.e. here comes an
2987 vrf = sctp_find_vrf(vrf_id);
2991 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2992 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2993 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2994 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2995 if (sctp_ifn == NULL) {
2996 /* ?? We don't have this guy ?? */
2997 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2998 goto bound_all_plan_b;
3000 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3001 ifn_index, sctp_ifn->ifn_name);
3004 cur_addr_num = net->indx_of_eligible_next_to_use;
3006 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3011 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3012 num_preferred, sctp_ifn->ifn_name);
3013 if (num_preferred == 0) {
3015 * no eligible addresses, we must use some other interface
3016 * address if we can find one.
3018 goto bound_all_plan_b;
3021 * Ok we have num_eligible_addr set with how many we can use, this
3022 * may vary from call to call due to addresses being deprecated
3025 if (cur_addr_num >= num_preferred) {
3029 * select the nth address from the list (where cur_addr_num is the
3030 * nth) and 0 is the first one, 1 is the second one etc...
3032 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3034 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3035 dest_is_priv, cur_addr_num, fam, ro);
3037 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3039 atomic_add_int(&sctp_ifa->refcount, 1);
3041 /* save off where the next one we will want */
3042 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3047 * plan_b: Look at all interfaces and find a preferred address. If
3048 * no preferred fall through to plan_c.
3051 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3052 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3054 sctp_ifn->ifn_name);
3055 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3056 /* wrong base scope */
3057 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3060 if ((sctp_ifn == looked_at) && looked_at) {
3061 /* already looked at this guy */
3062 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3065 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3066 dest_is_loop, dest_is_priv, fam);
3067 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3068 "Found ifn:%p %d preferred source addresses\n",
3069 ifn, num_preferred);
3070 if (num_preferred == 0) {
3071 /* None on this interface. */
3072 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3075 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3076 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3077 num_preferred, (void *)sctp_ifn, cur_addr_num);
3080 * Ok we have num_eligible_addr set with how many we can
3081 * use, this may vary from call to call due to addresses
3082 * being deprecated etc..
3084 if (cur_addr_num >= num_preferred) {
3087 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3088 dest_is_priv, cur_addr_num, fam, ro);
3092 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3093 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3096 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3100 atomic_add_int(&sifa->refcount, 1);
3104 again_with_private_addresses_allowed:
3106 /* plan_c: do we have an acceptable address on the emit interface */
3108 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3109 if (emit_ifn == NULL) {
3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3113 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3114 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3116 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3117 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3118 &sctp_ifa->address.sin.sin_addr) != 0)) {
3119 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3124 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3125 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3126 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3127 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3131 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3132 (non_asoc_addr_ok == 0)) {
3133 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3136 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3139 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3143 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3144 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3148 if (((non_asoc_addr_ok == 0) &&
3149 (sctp_is_addr_restricted(stcb, sifa))) ||
3150 (non_asoc_addr_ok &&
3151 (sctp_is_addr_restricted(stcb, sifa)) &&
3152 (!sctp_is_addr_pending(stcb, sifa)))) {
3154 * It is restricted for some reason..
3155 * probably not yet added.
3157 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3162 atomic_add_int(&sifa->refcount, 1);
3167 * plan_d: We are in trouble. No preferred address on the emit
3168 * interface. And not even a preferred address on all interfaces. Go
3169 * out and see if we can find an acceptable address somewhere
3170 * amongst all interfaces.
3172 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3173 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3174 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3175 /* wrong base scope */
3178 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3180 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3181 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3182 &sctp_ifa->address.sin.sin_addr) != 0)) {
3187 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3188 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3189 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3193 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3194 (non_asoc_addr_ok == 0))
3196 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3202 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3206 if (((non_asoc_addr_ok == 0) &&
3207 (sctp_is_addr_restricted(stcb, sifa))) ||
3208 (non_asoc_addr_ok &&
3209 (sctp_is_addr_restricted(stcb, sifa)) &&
3210 (!sctp_is_addr_pending(stcb, sifa)))) {
3212 * It is restricted for some
3213 * reason.. probably not yet added.
3224 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3225 stcb->asoc.scope.ipv4_local_scope = 1;
3227 goto again_with_private_addresses_allowed;
3228 } else if (retried == 1) {
3229 stcb->asoc.scope.ipv4_local_scope = 0;
3237 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3238 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3239 /* wrong base scope */
3242 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3243 struct sctp_ifa *tmp_sifa;
3246 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3247 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3248 &sctp_ifa->address.sin.sin_addr) != 0)) {
3253 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3254 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3255 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3259 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3260 (non_asoc_addr_ok == 0))
3262 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3265 if (tmp_sifa == NULL) {
3268 if (tmp_sifa == sifa) {
3272 if (sctp_is_address_in_scope(tmp_sifa,
3273 &stcb->asoc.scope, 0) == 0) {
3276 if (((non_asoc_addr_ok == 0) &&
3277 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3278 (non_asoc_addr_ok &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3280 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3290 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3291 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3292 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3297 atomic_add_int(&sifa->refcount, 1);
3305 /* tcb may be NULL */
3307 sctp_source_address_selection(struct sctp_inpcb *inp,
3308 struct sctp_tcb *stcb,
3310 struct sctp_nets *net,
3311 int non_asoc_addr_ok, uint32_t vrf_id)
3313 struct sctp_ifa *answer;
3314 uint8_t dest_is_priv, dest_is_loop;
3317 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3320 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3325 * - Find the route if needed, cache if I can.
3326 * - Look at interface address in route, Is it in the bound list. If so we
3327 * have the best source.
3328 * - If not we must rotate amongst the addresses.
3332 * Do we need to pay attention to scope. We can have a private address
3333 * or a global address we are sourcing or sending to. So if we draw
3335 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3337 * ------------------------------------------
3338 * source * dest * result
3339 * -----------------------------------------
3340 * <a> Private * Global * NAT
3341 * -----------------------------------------
3342 * <b> Private * Private * No problem
3343 * -----------------------------------------
3344 * <c> Global * Private * Huh, How will this work?
3345 * -----------------------------------------
3346 * <d> Global * Global * No Problem
3347 *------------------------------------------
3348 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3350 *------------------------------------------
3351 * source * dest * result
3352 * -----------------------------------------
3353 * <a> Linklocal * Global *
3354 * -----------------------------------------
3355 * <b> Linklocal * Linklocal * No problem
3356 * -----------------------------------------
3357 * <c> Global * Linklocal * Huh, How will this work?
3358 * -----------------------------------------
3359 * <d> Global * Global * No Problem
3360 *------------------------------------------
3361 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3363 * And then we add to that what happens if there are multiple addresses
3364 * assigned to an interface. Remember the ifa on a ifn is a linked
3365 * list of addresses. So one interface can have more than one IP
3366 * address. What happens if we have both a private and a global
3367 * address? Do we then use context of destination to sort out which
3368 * one is best? And what about NAT's sending P->G may get you a NAT
3369 * translation, or should you select the G thats on the interface in
3374 * - count the number of addresses on the interface.
3375 * - if it is one, no problem except case <c>.
3376 * For <a> we will assume a NAT out there.
3377 * - if there are more than one, then we need to worry about scope P
3378 * or G. We should prefer G -> G and P -> P if possible.
3379 * Then as a secondary fall back to mixed types G->P being a last
3381 * - The above all works for bound all, but bound specific we need to
3382 * use the same concept but instead only consider the bound
3383 * addresses. If the bound set is NOT assigned to the interface then
3384 * we must use rotation amongst the bound addresses..
3386 if (ro->ro_rt == NULL) {
3388 * Need a route to cache.
3390 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3392 if (ro->ro_rt == NULL) {
3395 fam = ro->ro_dst.sa_family;
3396 dest_is_priv = dest_is_loop = 0;
3397 /* Setup our scopes for the destination */
3401 /* Scope based on outbound address */
3402 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3405 /* mark it as local */
3406 net->addr_is_local = 1;
3408 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3415 /* Scope based on outbound address */
3416 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3417 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3419 * If the address is a loopback address, which
3420 * consists of "::1" OR "fe80::1%lo0", we are
3421 * loopback scope. But we don't use dest_is_priv
3422 * (link local addresses).
3426 /* mark it as local */
3427 net->addr_is_local = 1;
3429 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3435 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3436 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3437 SCTP_IPI_ADDR_RLOCK();
3438 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3442 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3443 dest_is_priv, dest_is_loop,
3444 non_asoc_addr_ok, fam);
3445 SCTP_IPI_ADDR_RUNLOCK();
3452 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3453 vrf_id, dest_is_priv,
3455 non_asoc_addr_ok, fam);
3457 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3462 SCTP_IPI_ADDR_RUNLOCK();
3467 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3470 struct sctp_sndinfo sndinfo;
3471 struct sctp_prinfo prinfo;
3472 struct sctp_authinfo authinfo;
3473 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3477 * Independent of how many mbufs, find the c_type inside the control
3478 * structure and copy out the data.
3481 tot_len = SCTP_BUF_LEN(control);
3482 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3483 rem_len = tot_len - off;
3484 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3485 /* There is not enough room for one more. */
3488 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3489 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3490 /* We dont't have a complete CMSG header. */
3493 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3494 /* We don't have the complete CMSG. */
3497 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3498 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3499 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3500 ((c_type == cmh.cmsg_type) ||
3501 ((c_type == SCTP_SNDRCV) &&
3502 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3503 (cmh.cmsg_type == SCTP_PRINFO) ||
3504 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3505 if (c_type == cmh.cmsg_type) {
3506 if (cpsize > INT_MAX) {
3509 if (cmsg_data_len < (int)cpsize) {
3512 /* It is exactly what we want. Copy it out. */
3513 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3516 struct sctp_sndrcvinfo *sndrcvinfo;
3518 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3520 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3523 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3525 switch (cmh.cmsg_type) {
3527 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3530 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3531 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3532 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3533 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3534 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3535 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3538 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3541 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3542 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3543 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3545 sndrcvinfo->sinfo_timetolive = 0;
3547 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3550 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3553 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3554 sndrcvinfo->sinfo_keynumber_valid = 1;
3555 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3568 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3572 struct sctp_initmsg initmsg;
3574 struct sockaddr_in sin;
3577 struct sockaddr_in6 sin6;
3580 tlen = SCTP_BUF_LEN(control);
3583 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3584 /* There is not enough room for one more. */
3588 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3589 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3590 /* We dont't have a complete CMSG header. */
3594 if (((int)cmh.cmsg_len + at) > tlen) {
3595 /* We don't have the complete CMSG. */
3599 if (cmh.cmsg_level == IPPROTO_SCTP) {
3600 switch (cmh.cmsg_type) {
3602 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3606 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3607 if (initmsg.sinit_max_attempts)
3608 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3609 if (initmsg.sinit_num_ostreams)
3610 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3611 if (initmsg.sinit_max_instreams)
3612 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3613 if (initmsg.sinit_max_init_timeo)
3614 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3615 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3616 struct sctp_stream_out *tmp_str;
3618 #if defined(SCTP_DETAILED_STR_STATS)
3622 /* Default is NOT correct */
3623 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3624 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3625 SCTP_TCB_UNLOCK(stcb);
3626 SCTP_MALLOC(tmp_str,
3627 struct sctp_stream_out *,
3628 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3630 SCTP_TCB_LOCK(stcb);
3631 if (tmp_str != NULL) {
3632 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3633 stcb->asoc.strmout = tmp_str;
3634 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3636 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3638 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3639 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3640 stcb->asoc.strmout[i].chunks_on_queues = 0;
3641 stcb->asoc.strmout[i].next_mid_ordered = 0;
3642 stcb->asoc.strmout[i].next_mid_unordered = 0;
3643 #if defined(SCTP_DETAILED_STR_STATS)
3644 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3645 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3646 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3649 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3650 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3652 stcb->asoc.strmout[i].sid = i;
3653 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3654 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3655 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3660 case SCTP_DSTADDRV4:
3661 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3665 memset(&sin, 0, sizeof(struct sockaddr_in));
3666 sin.sin_family = AF_INET;
3667 sin.sin_len = sizeof(struct sockaddr_in);
3668 sin.sin_port = stcb->rport;
3669 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3670 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3671 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3672 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3676 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3677 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3684 case SCTP_DSTADDRV6:
3685 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3689 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3690 sin6.sin6_family = AF_INET6;
3691 sin6.sin6_len = sizeof(struct sockaddr_in6);
3692 sin6.sin6_port = stcb->rport;
3693 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3694 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3695 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3700 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3701 in6_sin6_2_sin(&sin, &sin6);
3702 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3703 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3704 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3708 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3709 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3715 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3716 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3726 at += CMSG_ALIGN(cmh.cmsg_len);
3731 static struct sctp_tcb *
3732 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3734 struct mbuf *control,
3735 struct sctp_nets **net_p,
3740 struct sctp_tcb *stcb;
3741 struct sockaddr *addr;
3743 struct sockaddr_in sin;
3746 struct sockaddr_in6 sin6;
3749 tlen = SCTP_BUF_LEN(control);
3752 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3753 /* There is not enough room for one more. */
3757 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3758 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3759 /* We dont't have a complete CMSG header. */
3763 if (((int)cmh.cmsg_len + at) > tlen) {
3764 /* We don't have the complete CMSG. */
3768 if (cmh.cmsg_level == IPPROTO_SCTP) {
3769 switch (cmh.cmsg_type) {
3771 case SCTP_DSTADDRV4:
3772 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3776 memset(&sin, 0, sizeof(struct sockaddr_in));
3777 sin.sin_family = AF_INET;
3778 sin.sin_len = sizeof(struct sockaddr_in);
3779 sin.sin_port = port;
3780 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3781 addr = (struct sockaddr *)&sin;
3785 case SCTP_DSTADDRV6:
3786 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3790 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3791 sin6.sin6_family = AF_INET6;
3792 sin6.sin6_len = sizeof(struct sockaddr_in6);
3793 sin6.sin6_port = port;
3794 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3796 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3797 in6_sin6_2_sin(&sin, &sin6);
3798 addr = (struct sockaddr *)&sin;
3801 addr = (struct sockaddr *)&sin6;
3809 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3815 at += CMSG_ALIGN(cmh.cmsg_len);
3820 static struct mbuf *
3821 sctp_add_cookie(struct mbuf *init, int init_offset,
3822 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3824 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3825 struct sctp_state_cookie *stc;
3826 struct sctp_paramhdr *ph;
3831 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3832 sizeof(struct sctp_paramhdr)), 0,
3833 M_NOWAIT, 1, MT_DATA);
3837 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3838 if (copy_init == NULL) {
3842 #ifdef SCTP_MBUF_LOGGING
3843 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3844 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3847 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3849 if (copy_initack == NULL) {
3851 sctp_m_freem(copy_init);
3854 #ifdef SCTP_MBUF_LOGGING
3855 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3856 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3859 /* easy side we just drop it on the end */
3860 ph = mtod(mret, struct sctp_paramhdr *);
3861 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3862 sizeof(struct sctp_paramhdr);
3863 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3864 sizeof(struct sctp_paramhdr));
3865 ph->param_type = htons(SCTP_STATE_COOKIE);
3866 ph->param_length = 0; /* fill in at the end */
3867 /* Fill in the stc cookie data */
3868 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3870 /* tack the INIT and then the INIT-ACK onto the chain */
3872 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3873 cookie_sz += SCTP_BUF_LEN(m_at);
3874 if (SCTP_BUF_NEXT(m_at) == NULL) {
3875 SCTP_BUF_NEXT(m_at) = copy_init;
3879 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3880 cookie_sz += SCTP_BUF_LEN(m_at);
3881 if (SCTP_BUF_NEXT(m_at) == NULL) {
3882 SCTP_BUF_NEXT(m_at) = copy_initack;
3886 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3887 cookie_sz += SCTP_BUF_LEN(m_at);
3888 if (SCTP_BUF_NEXT(m_at) == NULL) {
3892 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3894 /* no space, so free the entire chain */
3898 SCTP_BUF_LEN(sig) = 0;
3899 SCTP_BUF_NEXT(m_at) = sig;
3901 foo = (uint8_t *)(mtod(sig, caddr_t)+sig_offset);
3902 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3904 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3905 cookie_sz += SCTP_SIGNATURE_SIZE;
3906 ph->param_length = htons(cookie_sz);
3912 sctp_get_ect(struct sctp_tcb *stcb)
3914 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3915 return (SCTP_ECT0_BIT);
3921 #if defined(INET) || defined(INET6)
3923 sctp_handle_no_route(struct sctp_tcb *stcb,
3924 struct sctp_nets *net,
3927 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3931 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3932 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3933 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3934 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3935 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3939 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3940 net->dest_state &= ~SCTP_ADDR_PF;
3944 if (net == stcb->asoc.primary_destination) {
3945 /* need a new primary */
3946 struct sctp_nets *alt;
3948 alt = sctp_find_alternate_net(stcb, net, 0);
3950 if (stcb->asoc.alternate) {
3951 sctp_free_remote_addr(stcb->asoc.alternate);
3953 stcb->asoc.alternate = alt;
3954 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3955 if (net->ro._s_addr) {
3956 sctp_free_ifa(net->ro._s_addr);
3957 net->ro._s_addr = NULL;
3959 net->src_addr_selected = 0;
3968 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3969 struct sctp_tcb *stcb, /* may be NULL */
3970 struct sctp_nets *net,
3971 struct sockaddr *to,
3973 uint32_t auth_offset,
3974 struct sctp_auth_chunk *auth,
3975 uint16_t auth_keyid,
3976 int nofragment_flag,
3983 union sctp_sockstore *over_addr,
3984 uint8_t mflowtype, uint32_t mflowid,
3985 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3986 int so_locked SCTP_UNUSED
3991 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3994 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3995 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3996 * - fill in the HMAC digest of any AUTH chunk in the packet.
3997 * - calculate and fill in the SCTP checksum.
3998 * - prepend an IP address header.
3999 * - if boundall use INADDR_ANY.
4000 * - if boundspecific do source address selection.
4001 * - set fragmentation option for ipV4.
4002 * - On return from IP output, check/adjust mtu size of output
4003 * interface and smallest_mtu size as well.
4005 /* Will need ifdefs around this */
4007 struct sctphdr *sctphdr;
4010 #if defined(INET) || defined(INET6)
4013 #if defined(INET) || defined(INET6)
4015 sctp_route_t *ro = NULL;
4016 struct udphdr *udp = NULL;
4019 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4020 struct socket *so = NULL;
4023 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4024 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4028 #if defined(INET) || defined(INET6)
4030 vrf_id = stcb->asoc.vrf_id;
4032 vrf_id = inp->def_vrf_id;
4035 /* fill in the HMAC digest for any AUTH chunk in the packet */
4036 if ((auth != NULL) && (stcb != NULL)) {
4037 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4040 tos_value = net->dscp;
4042 tos_value = stcb->asoc.default_dscp;
4044 tos_value = inp->sctp_ep.default_dscp;
4047 switch (to->sa_family) {
4051 struct ip *ip = NULL;
4052 sctp_route_t iproute;
4055 len = SCTP_MIN_V4_OVERHEAD;
4057 len += sizeof(struct udphdr);
4059 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4062 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4065 SCTP_ALIGN_TO_END(newm, len);
4066 SCTP_BUF_LEN(newm) = len;
4067 SCTP_BUF_NEXT(newm) = m;
4070 m->m_pkthdr.flowid = net->flowid;
4071 M_HASHTYPE_SET(m, net->flowtype);
4073 m->m_pkthdr.flowid = mflowid;
4074 M_HASHTYPE_SET(m, mflowtype);
4076 packet_length = sctp_calculate_len(m);
4077 ip = mtod(m, struct ip *);
4078 ip->ip_v = IPVERSION;
4079 ip->ip_hl = (sizeof(struct ip) >> 2);
4080 if (tos_value == 0) {
4082 * This means especially, that it is not set
4083 * at the SCTP layer. So use the value from
4086 tos_value = inp->ip_inp.inp.inp_ip_tos;
4090 tos_value |= sctp_get_ect(stcb);
4092 if ((nofragment_flag) && (port == 0)) {
4093 ip->ip_off = htons(IP_DF);
4095 ip->ip_off = htons(0);
4097 /* FreeBSD has a function for ip_id's */
4100 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4101 ip->ip_len = htons(packet_length);
4102 ip->ip_tos = tos_value;
4104 ip->ip_p = IPPROTO_UDP;
4106 ip->ip_p = IPPROTO_SCTP;
4111 memset(&iproute, 0, sizeof(iproute));
4112 memcpy(&ro->ro_dst, to, to->sa_len);
4114 ro = (sctp_route_t *)&net->ro;
4116 /* Now the address selection part */
4117 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4119 /* call the routine to select the src address */
4120 if (net && out_of_asoc_ok == 0) {
4121 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4122 sctp_free_ifa(net->ro._s_addr);
4123 net->ro._s_addr = NULL;
4124 net->src_addr_selected = 0;
4130 if (net->src_addr_selected == 0) {
4131 /* Cache the source address */
4132 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4135 net->src_addr_selected = 1;
4137 if (net->ro._s_addr == NULL) {
4138 /* No route to host */
4139 net->src_addr_selected = 0;
4140 sctp_handle_no_route(stcb, net, so_locked);
4141 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4143 return (EHOSTUNREACH);
4145 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4147 if (over_addr == NULL) {
4148 struct sctp_ifa *_lsrc;
4150 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4154 if (_lsrc == NULL) {
4155 sctp_handle_no_route(stcb, net, so_locked);
4156 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4158 return (EHOSTUNREACH);
4160 ip->ip_src = _lsrc->address.sin.sin_addr;
4161 sctp_free_ifa(_lsrc);
4163 ip->ip_src = over_addr->sin.sin_addr;
4164 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4168 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4169 sctp_handle_no_route(stcb, net, so_locked);
4170 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4172 return (EHOSTUNREACH);
4174 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4175 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4176 udp->uh_dport = port;
4177 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4179 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4183 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4185 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4188 sctphdr->src_port = src_port;
4189 sctphdr->dest_port = dest_port;
4190 sctphdr->v_tag = v_tag;
4191 sctphdr->checksum = 0;
4194 * If source address selection fails and we find no
4195 * route then the ip_output should fail as well with
4196 * a NO_ROUTE_TO_HOST type error. We probably should
4197 * catch that somewhere and abort the association
4198 * right away (assuming this is an INIT being sent).
4200 if (ro->ro_rt == NULL) {
4202 * src addr selection failed to find a route
4203 * (or valid source addr), so we can't get
4204 * there from here (yet)!
4206 sctp_handle_no_route(stcb, net, so_locked);
4207 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4209 return (EHOSTUNREACH);
4211 if (ro != &iproute) {
4212 memcpy(&iproute, ro, sizeof(*ro));
4214 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4215 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4216 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4217 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4218 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4221 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4222 /* failed to prepend data, give up */
4223 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4227 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4229 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4230 SCTP_STAT_INCR(sctps_sendswcrc);
4232 SCTP_ENABLE_UDP_CSUM(o_pak);
4235 m->m_pkthdr.csum_flags = CSUM_SCTP;
4236 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4237 SCTP_STAT_INCR(sctps_sendhwcrc);
4239 #ifdef SCTP_PACKET_LOGGING
4240 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4241 sctp_packet_log(o_pak);
4243 /* send it out. table id is taken from stcb */
4244 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4245 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4246 so = SCTP_INP_SO(inp);
4247 SCTP_SOCKET_UNLOCK(so, 0);
4250 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4251 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4252 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4253 atomic_add_int(&stcb->asoc.refcnt, 1);
4254 SCTP_TCB_UNLOCK(stcb);
4255 SCTP_SOCKET_LOCK(so, 0);
4256 SCTP_TCB_LOCK(stcb);
4257 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4260 SCTP_STAT_INCR(sctps_sendpackets);
4261 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4263 SCTP_STAT_INCR(sctps_senderrors);
4265 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4267 /* free tempy routes */
4270 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4271 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4274 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4277 mtu -= sizeof(struct udphdr);
4279 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4280 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4284 } else if (ro->ro_rt == NULL) {
4285 /* route was freed */
4286 if (net->ro._s_addr &&
4287 net->src_addr_selected) {
4288 sctp_free_ifa(net->ro._s_addr);
4289 net->ro._s_addr = NULL;
4291 net->src_addr_selected = 0;
4300 uint32_t flowlabel, flowinfo;
4301 struct ip6_hdr *ip6h;
4302 struct route_in6 ip6route;
4304 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4306 struct sockaddr_in6 lsa6_storage;
4308 u_short prev_port = 0;
4312 flowlabel = net->flowlabel;
4314 flowlabel = stcb->asoc.default_flowlabel;
4316 flowlabel = inp->sctp_ep.default_flowlabel;
4318 if (flowlabel == 0) {
4320 * This means especially, that it is not set
4321 * at the SCTP layer. So use the value from
4324 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4326 flowlabel &= 0x000fffff;
4327 len = SCTP_MIN_OVERHEAD;
4329 len += sizeof(struct udphdr);
4331 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4334 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4337 SCTP_ALIGN_TO_END(newm, len);
4338 SCTP_BUF_LEN(newm) = len;
4339 SCTP_BUF_NEXT(newm) = m;
4342 m->m_pkthdr.flowid = net->flowid;
4343 M_HASHTYPE_SET(m, net->flowtype);
4345 m->m_pkthdr.flowid = mflowid;
4346 M_HASHTYPE_SET(m, mflowtype);
4348 packet_length = sctp_calculate_len(m);
4350 ip6h = mtod(m, struct ip6_hdr *);
4351 /* protect *sin6 from overwrite */
4352 sin6 = (struct sockaddr_in6 *)to;
4356 /* KAME hack: embed scopeid */
4357 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4358 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4362 memset(&ip6route, 0, sizeof(ip6route));
4363 ro = (sctp_route_t *)&ip6route;
4364 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4366 ro = (sctp_route_t *)&net->ro;
4369 * We assume here that inp_flow is in host byte
4370 * order within the TCB!
4372 if (tos_value == 0) {
4374 * This means especially, that it is not set
4375 * at the SCTP layer. So use the value from
4378 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4382 tos_value |= sctp_get_ect(stcb);
4386 flowinfo |= tos_value;
4388 flowinfo |= flowlabel;
4389 ip6h->ip6_flow = htonl(flowinfo);
4391 ip6h->ip6_nxt = IPPROTO_UDP;
4393 ip6h->ip6_nxt = IPPROTO_SCTP;
4395 ip6h->ip6_plen = (uint16_t)(packet_length - sizeof(struct ip6_hdr));
4396 ip6h->ip6_dst = sin6->sin6_addr;
4399 * Add SRC address selection here: we can only reuse
4400 * to a limited degree the kame src-addr-sel, since
4401 * we can try their selection but it may not be
4404 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4405 lsa6_tmp.sin6_family = AF_INET6;
4406 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4408 if (net && out_of_asoc_ok == 0) {
4409 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4410 sctp_free_ifa(net->ro._s_addr);
4411 net->ro._s_addr = NULL;
4412 net->src_addr_selected = 0;
4418 if (net->src_addr_selected == 0) {
4419 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4420 /* KAME hack: embed scopeid */
4421 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4422 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4425 /* Cache the source address */
4426 net->ro._s_addr = sctp_source_address_selection(inp,
4432 (void)sa6_recoverscope(sin6);
4433 net->src_addr_selected = 1;
4435 if (net->ro._s_addr == NULL) {
4436 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4437 net->src_addr_selected = 0;
4438 sctp_handle_no_route(stcb, net, so_locked);
4439 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4441 return (EHOSTUNREACH);
4443 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4445 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4446 /* KAME hack: embed scopeid */
4447 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4448 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4451 if (over_addr == NULL) {
4452 struct sctp_ifa *_lsrc;
4454 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4458 if (_lsrc == NULL) {
4459 sctp_handle_no_route(stcb, net, so_locked);
4460 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4462 return (EHOSTUNREACH);
4464 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4465 sctp_free_ifa(_lsrc);
4467 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4468 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4470 (void)sa6_recoverscope(sin6);
4472 lsa6->sin6_port = inp->sctp_lport;
4474 if (ro->ro_rt == NULL) {
4476 * src addr selection failed to find a route
4477 * (or valid source addr), so we can't get
4480 sctp_handle_no_route(stcb, net, so_locked);
4481 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4483 return (EHOSTUNREACH);
4486 * XXX: sa6 may not have a valid sin6_scope_id in
4487 * the non-SCOPEDROUTING case.
4489 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4490 lsa6_storage.sin6_family = AF_INET6;
4491 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4492 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4493 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4494 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4499 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4500 lsa6_storage.sin6_port = inp->sctp_lport;
4501 lsa6 = &lsa6_storage;
4502 ip6h->ip6_src = lsa6->sin6_addr;
4505 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4506 sctp_handle_no_route(stcb, net, so_locked);
4507 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4509 return (EHOSTUNREACH);
4511 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4512 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4513 udp->uh_dport = port;
4514 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4516 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4518 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4521 sctphdr->src_port = src_port;
4522 sctphdr->dest_port = dest_port;
4523 sctphdr->v_tag = v_tag;
4524 sctphdr->checksum = 0;
4527 * We set the hop limit now since there is a good
4528 * chance that our ro pointer is now filled
4530 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4531 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4534 /* Copy to be sure something bad is not happening */
4535 sin6->sin6_addr = ip6h->ip6_dst;
4536 lsa6->sin6_addr = ip6h->ip6_src;
4539 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4540 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4541 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4542 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4543 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4545 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4547 * preserve the port and scope for link
4550 prev_scope = sin6->sin6_scope_id;
4551 prev_port = sin6->sin6_port;
4553 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4554 /* failed to prepend data, give up */
4556 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4559 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4561 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4562 SCTP_STAT_INCR(sctps_sendswcrc);
4563 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4564 udp->uh_sum = 0xffff;
4567 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4568 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4569 SCTP_STAT_INCR(sctps_sendhwcrc);
4571 /* send it out. table id is taken from stcb */
4572 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4573 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4574 so = SCTP_INP_SO(inp);
4575 SCTP_SOCKET_UNLOCK(so, 0);
4578 #ifdef SCTP_PACKET_LOGGING
4579 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4580 sctp_packet_log(o_pak);
4582 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4583 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4584 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4585 atomic_add_int(&stcb->asoc.refcnt, 1);
4586 SCTP_TCB_UNLOCK(stcb);
4587 SCTP_SOCKET_LOCK(so, 0);
4588 SCTP_TCB_LOCK(stcb);
4589 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4593 /* for link local this must be done */
4594 sin6->sin6_scope_id = prev_scope;
4595 sin6->sin6_port = prev_port;
4597 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4598 SCTP_STAT_INCR(sctps_sendpackets);
4599 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4601 SCTP_STAT_INCR(sctps_senderrors);
4604 /* Now if we had a temp route free it */
4608 * PMTU check versus smallest asoc MTU goes
4611 if (ro->ro_rt == NULL) {
4612 /* Route was freed */
4613 if (net->ro._s_addr &&
4614 net->src_addr_selected) {
4615 sctp_free_ifa(net->ro._s_addr);
4616 net->ro._s_addr = NULL;
4618 net->src_addr_selected = 0;
4620 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4621 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4624 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4627 mtu -= sizeof(struct udphdr);
4629 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4630 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4635 if (ND_IFINFO(ifp)->linkmtu &&
4636 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4637 sctp_mtu_size_reset(inp,
4639 ND_IFINFO(ifp)->linkmtu);
4647 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4648 ((struct sockaddr *)to)->sa_family);
4650 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4657 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4658 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4663 struct mbuf *m, *m_last;
4664 struct sctp_nets *net;
4665 struct sctp_init_chunk *init;
4666 struct sctp_supported_addr_param *sup_addr;
4667 struct sctp_adaptation_layer_indication *ali;
4668 struct sctp_supported_chunk_types_param *pr_supported;
4669 struct sctp_paramhdr *ph;
4670 int cnt_inits_to = 0;
4672 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4674 /* INIT's always go to the primary (and usually ONLY address) */
4675 net = stcb->asoc.primary_destination;
4677 net = TAILQ_FIRST(&stcb->asoc.nets);
4682 /* we confirm any address we send an INIT to */
4683 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4684 (void)sctp_set_primary_addr(stcb, NULL, net);
4686 /* we confirm any address we send an INIT to */
4687 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4689 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4691 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4693 * special hook, if we are sending to link local it will not
4694 * show up in our private address count.
4696 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4700 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4701 /* This case should not happen */
4702 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4705 /* start the INIT timer */
4706 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4708 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4710 /* No memory, INIT timer will re-attempt. */
4711 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4714 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4716 /* Now lets put the chunk header in place */
4717 init = mtod(m, struct sctp_init_chunk *);
4718 /* now the chunk header */
4719 init->ch.chunk_type = SCTP_INITIATION;
4720 init->ch.chunk_flags = 0;
4721 /* fill in later from mbuf we build */
4722 init->ch.chunk_length = 0;
4723 /* place in my tag */
4724 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4725 /* set up some of the credits. */
4726 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4727 SCTP_MINIMAL_RWND));
4728 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4729 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4730 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4732 /* Adaptation layer indication parameter */
4733 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4734 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4735 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4736 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4737 ali->ph.param_length = htons(parameter_len);
4738 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4739 chunk_len += parameter_len;
4742 if (stcb->asoc.ecn_supported == 1) {
4743 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4744 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4745 ph->param_type = htons(SCTP_ECN_CAPABLE);
4746 ph->param_length = htons(parameter_len);
4747 chunk_len += parameter_len;
4749 /* PR-SCTP supported parameter */
4750 if (stcb->asoc.prsctp_supported == 1) {
4751 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4752 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4753 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4754 ph->param_length = htons(parameter_len);
4755 chunk_len += parameter_len;
4757 /* Add NAT friendly parameter. */
4758 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4759 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4760 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4761 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4762 ph->param_length = htons(parameter_len);
4763 chunk_len += parameter_len;
4765 /* And now tell the peer which extensions we support */
4767 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4768 if (stcb->asoc.prsctp_supported == 1) {
4769 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4770 if (stcb->asoc.idata_supported) {
4771 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4774 if (stcb->asoc.auth_supported == 1) {
4775 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4777 if (stcb->asoc.asconf_supported == 1) {
4778 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4779 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4781 if (stcb->asoc.reconfig_supported == 1) {
4782 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4784 if (stcb->asoc.idata_supported) {
4785 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4787 if (stcb->asoc.nrsack_supported == 1) {
4788 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4790 if (stcb->asoc.pktdrop_supported == 1) {
4791 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4794 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4795 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4796 pr_supported->ph.param_length = htons(parameter_len);
4797 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4798 chunk_len += parameter_len;
4800 /* add authentication parameters */
4801 if (stcb->asoc.auth_supported) {
4802 /* attach RANDOM parameter, if available */
4803 if (stcb->asoc.authinfo.random != NULL) {
4804 struct sctp_auth_random *randp;
4806 if (padding_len > 0) {
4807 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4808 chunk_len += padding_len;
4811 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4812 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4813 /* random key already contains the header */
4814 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4815 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4816 chunk_len += parameter_len;
4818 /* add HMAC_ALGO parameter */
4819 if (stcb->asoc.local_hmacs != NULL) {
4820 struct sctp_auth_hmac_algo *hmacs;
4822 if (padding_len > 0) {
4823 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4824 chunk_len += padding_len;
4827 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4828 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4829 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4830 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4831 hmacs->ph.param_length = htons(parameter_len);
4832 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4833 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4834 chunk_len += parameter_len;
4836 /* add CHUNKS parameter */
4837 if (stcb->asoc.local_auth_chunks != NULL) {
4838 struct sctp_auth_chunk_list *chunks;
4840 if (padding_len > 0) {
4841 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4842 chunk_len += padding_len;
4845 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4846 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4847 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4848 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4849 chunks->ph.param_length = htons(parameter_len);
4850 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4851 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4852 chunk_len += parameter_len;
4855 /* now any cookie time extensions */
4856 if (stcb->asoc.cookie_preserve_req) {
4857 struct sctp_cookie_perserve_param *cookie_preserve;
4859 if (padding_len > 0) {
4860 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4861 chunk_len += padding_len;
4864 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4865 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4866 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4867 cookie_preserve->ph.param_length = htons(parameter_len);
4868 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4869 stcb->asoc.cookie_preserve_req = 0;
4870 chunk_len += parameter_len;
4872 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4875 if (padding_len > 0) {
4876 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4877 chunk_len += padding_len;
4880 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4881 if (stcb->asoc.scope.ipv4_addr_legal) {
4882 parameter_len += (uint16_t)sizeof(uint16_t);
4884 if (stcb->asoc.scope.ipv6_addr_legal) {
4885 parameter_len += (uint16_t)sizeof(uint16_t);
4887 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4888 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4889 sup_addr->ph.param_length = htons(parameter_len);
4891 if (stcb->asoc.scope.ipv4_addr_legal) {
4892 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4894 if (stcb->asoc.scope.ipv6_addr_legal) {
4895 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4897 padding_len = 4 - 2 * i;
4898 chunk_len += parameter_len;
4900 SCTP_BUF_LEN(m) = chunk_len;
4901 /* now the addresses */
4903 * To optimize this we could put the scoping stuff into a structure
4904 * and remove the individual uint8's from the assoc structure. Then
4905 * we could just sifa in the address within the stcb. But for now
4906 * this is a quick hack to get the address stuff teased apart.
4908 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4910 &padding_len, &chunk_len);
4912 init->ch.chunk_length = htons(chunk_len);
4913 if (padding_len > 0) {
4914 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4919 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4920 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4921 (struct sockaddr *)&net->ro._l_addr,
4922 m, 0, NULL, 0, 0, 0, 0,
4923 inp->sctp_lport, stcb->rport, htonl(0),
4927 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4928 if (error == ENOBUFS) {
4929 stcb->asoc.ifp_had_enobuf = 1;
4930 SCTP_STAT_INCR(sctps_lowlevelerr);
4933 stcb->asoc.ifp_had_enobuf = 0;
4935 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4936 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4940 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4941 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4944 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4945 * being equal to the beginning of the params i.e. (iphlen +
4946 * sizeof(struct sctp_init_msg) parse through the parameters to the
4947 * end of the mbuf verifying that all parameters are known.
4949 * For unknown parameters build and return a mbuf with
4950 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4951 * processing this chunk stop, and set *abort_processing to 1.
4953 * By having param_offset be pre-set to where parameters begin it is
4954 * hoped that this routine may be reused in the future by new
4957 struct sctp_paramhdr *phdr, params;
4959 struct mbuf *mat, *op_err;
4960 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4961 int at, limit, pad_needed;
4962 uint16_t ptype, plen, padded_size;
4965 *abort_processing = 0;
4968 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4971 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4972 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4973 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4974 ptype = ntohs(phdr->param_type);
4975 plen = ntohs(phdr->param_length);
4976 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4977 /* wacked parameter */
4978 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4981 limit -= SCTP_SIZE32(plen);
4983 * All parameters for all chunks that we know/understand are
4984 * listed here. We process them other places and make
4985 * appropriate stop actions per the upper bits. However this
4986 * is the generic routine processor's can call to get back
4987 * an operr.. to either incorporate (init-ack) or send.
4989 padded_size = SCTP_SIZE32(plen);
4991 /* Param's with variable size */
4992 case SCTP_HEARTBEAT_INFO:
4993 case SCTP_STATE_COOKIE:
4994 case SCTP_UNRECOG_PARAM:
4995 case SCTP_ERROR_CAUSE_IND:
4999 /* Param's with variable size within a range */
5000 case SCTP_CHUNK_LIST:
5001 case SCTP_SUPPORTED_CHUNK_EXT:
5002 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5003 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5008 case SCTP_SUPPORTED_ADDRTYPE:
5009 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5010 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5016 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5017 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5022 case SCTP_SET_PRIM_ADDR:
5023 case SCTP_DEL_IP_ADDRESS:
5024 case SCTP_ADD_IP_ADDRESS:
5025 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5026 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5027 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5032 /* Param's with a fixed size */
5033 case SCTP_IPV4_ADDRESS:
5034 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5035 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5040 case SCTP_IPV6_ADDRESS:
5041 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5042 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5047 case SCTP_COOKIE_PRESERVE:
5048 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5049 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5054 case SCTP_HAS_NAT_SUPPORT:
5057 case SCTP_PRSCTP_SUPPORTED:
5058 if (padded_size != sizeof(struct sctp_paramhdr)) {
5059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5064 case SCTP_ECN_CAPABLE:
5065 if (padded_size != sizeof(struct sctp_paramhdr)) {
5066 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5071 case SCTP_ULP_ADAPTATION:
5072 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5073 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5078 case SCTP_SUCCESS_REPORT:
5079 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5080 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5085 case SCTP_HOSTNAME_ADDRESS:
5087 /* We can NOT handle HOST NAME addresses!! */
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5091 *abort_processing = 1;
5092 if (op_err == NULL) {
5093 /* Ok need to try to get a mbuf */
5095 l_len = SCTP_MIN_OVERHEAD;
5097 l_len = SCTP_MIN_V4_OVERHEAD;
5099 l_len += sizeof(struct sctp_chunkhdr);
5101 l_len += sizeof(struct sctp_paramhdr);
5102 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5104 SCTP_BUF_LEN(op_err) = 0;
5106 * pre-reserve space for ip
5107 * and sctp header and
5111 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5113 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5115 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5116 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5120 /* If we have space */
5121 struct sctp_paramhdr s;
5124 uint32_t cpthis = 0;
5126 pad_needed = 4 - (err_at % 4);
5127 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5128 err_at += pad_needed;
5130 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5131 s.param_length = htons(sizeof(s) + plen);
5132 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5133 err_at += sizeof(s);
5134 if (plen > sizeof(tempbuf)) {
5135 plen = sizeof(tempbuf);
5137 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5139 sctp_m_freem(op_err);
5141 * we are out of memory but
5142 * we still need to have a
5143 * look at what to do (the
5144 * system is in trouble
5149 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5156 * we do not recognize the parameter figure out what
5159 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5160 if ((ptype & 0x4000) == 0x4000) {
5161 /* Report bit is set?? */
5162 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5163 if (op_err == NULL) {
5166 /* Ok need to try to get an mbuf */
5168 l_len = SCTP_MIN_OVERHEAD;
5170 l_len = SCTP_MIN_V4_OVERHEAD;
5172 l_len += sizeof(struct sctp_chunkhdr);
5174 l_len += sizeof(struct sctp_paramhdr);
5175 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5177 SCTP_BUF_LEN(op_err) = 0;
5179 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5181 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5183 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5184 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5188 /* If we have space */
5189 struct sctp_paramhdr s;
5192 uint32_t cpthis = 0;
5194 pad_needed = 4 - (err_at % 4);
5195 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5196 err_at += pad_needed;
5198 s.param_type = htons(SCTP_UNRECOG_PARAM);
5199 s.param_length = htons(sizeof(s) + plen);
5200 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5201 err_at += sizeof(s);
5202 if (plen > sizeof(tempbuf)) {
5203 plen = sizeof(tempbuf);
5205 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5207 sctp_m_freem(op_err);
5209 * we are out of memory but
5210 * we still need to have a
5211 * look at what to do (the
5212 * system is in trouble
5216 goto more_processing;
5218 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5223 if ((ptype & 0x8000) == 0x0000) {
5224 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5227 /* skip this chunk and continue processing */
5228 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5229 at += SCTP_SIZE32(plen);
5234 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5239 *abort_processing = 1;
5240 if ((op_err == NULL) && phdr) {
5243 l_len = SCTP_MIN_OVERHEAD;
5245 l_len = SCTP_MIN_V4_OVERHEAD;
5247 l_len += sizeof(struct sctp_chunkhdr);
5248 l_len += (2 * sizeof(struct sctp_paramhdr));
5249 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5251 SCTP_BUF_LEN(op_err) = 0;
5253 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5255 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5257 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5258 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5261 if ((op_err) && phdr) {
5262 struct sctp_paramhdr s;
5265 uint32_t cpthis = 0;
5267 pad_needed = 4 - (err_at % 4);
5268 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5269 err_at += pad_needed;
5271 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5272 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5273 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5274 err_at += sizeof(s);
5275 /* Only copy back the p-hdr that caused the issue */
5276 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5282 sctp_are_there_new_addresses(struct sctp_association *asoc,
5283 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5286 * Given a INIT packet, look through the packet to verify that there
5287 * are NO new addresses. As we go through the parameters add reports
5288 * of any un-understood parameters that require an error. Also we
5289 * must return (1) to drop the packet if we see a un-understood
5290 * parameter that tells us to drop the chunk.
5292 struct sockaddr *sa_touse;
5293 struct sockaddr *sa;
5294 struct sctp_paramhdr *phdr, params;
5295 uint16_t ptype, plen;
5297 struct sctp_nets *net;
5300 struct sockaddr_in sin4, *sa4;
5303 struct sockaddr_in6 sin6, *sa6;
5307 memset(&sin4, 0, sizeof(sin4));
5308 sin4.sin_family = AF_INET;
5309 sin4.sin_len = sizeof(sin4);
5312 memset(&sin6, 0, sizeof(sin6));
5313 sin6.sin6_family = AF_INET6;
5314 sin6.sin6_len = sizeof(sin6);
5316 /* First what about the src address of the pkt ? */
5318 switch (src->sa_family) {
5321 if (asoc->scope.ipv4_addr_legal) {
5328 if (asoc->scope.ipv6_addr_legal) {
5339 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5340 sa = (struct sockaddr *)&net->ro._l_addr;
5341 if (sa->sa_family == src->sa_family) {
5343 if (sa->sa_family == AF_INET) {
5344 struct sockaddr_in *src4;
5346 sa4 = (struct sockaddr_in *)sa;
5347 src4 = (struct sockaddr_in *)src;
5348 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5355 if (sa->sa_family == AF_INET6) {
5356 struct sockaddr_in6 *src6;
5358 sa6 = (struct sockaddr_in6 *)sa;
5359 src6 = (struct sockaddr_in6 *)src;
5360 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5369 /* New address added! no need to look further. */
5373 /* Ok so far lets munge through the rest of the packet */
5374 offset += sizeof(struct sctp_init_chunk);
5375 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5378 ptype = ntohs(phdr->param_type);
5379 plen = ntohs(phdr->param_length);
5382 case SCTP_IPV4_ADDRESS:
5384 struct sctp_ipv4addr_param *p4, p4_buf;
5386 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5389 phdr = sctp_get_next_param(in_initpkt, offset,
5390 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5394 if (asoc->scope.ipv4_addr_legal) {
5395 p4 = (struct sctp_ipv4addr_param *)phdr;
5396 sin4.sin_addr.s_addr = p4->addr;
5397 sa_touse = (struct sockaddr *)&sin4;
5403 case SCTP_IPV6_ADDRESS:
5405 struct sctp_ipv6addr_param *p6, p6_buf;
5407 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5410 phdr = sctp_get_next_param(in_initpkt, offset,
5411 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5415 if (asoc->scope.ipv6_addr_legal) {
5416 p6 = (struct sctp_ipv6addr_param *)phdr;
5417 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5419 sa_touse = (struct sockaddr *)&sin6;
5429 /* ok, sa_touse points to one to check */
5431 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5432 sa = (struct sockaddr *)&net->ro._l_addr;
5433 if (sa->sa_family != sa_touse->sa_family) {
5437 if (sa->sa_family == AF_INET) {
5438 sa4 = (struct sockaddr_in *)sa;
5439 if (sa4->sin_addr.s_addr ==
5440 sin4.sin_addr.s_addr) {
5447 if (sa->sa_family == AF_INET6) {
5448 sa6 = (struct sockaddr_in6 *)sa;
5449 if (SCTP6_ARE_ADDR_EQUAL(
5458 /* New addr added! no need to look further */
5462 offset += SCTP_SIZE32(plen);
5463 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5469 * Given a MBUF chain that was sent into us containing an INIT. Build a
5470 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5471 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5472 * message (i.e. the struct sctp_init_msg).
5475 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5476 struct sctp_nets *src_net, struct mbuf *init_pkt,
5477 int iphlen, int offset,
5478 struct sockaddr *src, struct sockaddr *dst,
5479 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5480 uint8_t mflowtype, uint32_t mflowid,
5481 uint32_t vrf_id, uint16_t port)
5483 struct sctp_association *asoc;
5484 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5485 struct sctp_init_ack_chunk *initack;
5486 struct sctp_adaptation_layer_indication *ali;
5487 struct sctp_supported_chunk_types_param *pr_supported;
5488 struct sctp_paramhdr *ph;
5489 union sctp_sockstore *over_addr;
5490 struct sctp_scoping scp;
5493 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5494 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5495 struct sockaddr_in *sin;
5498 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5499 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5500 struct sockaddr_in6 *sin6;
5502 struct sockaddr *to;
5503 struct sctp_state_cookie stc;
5504 struct sctp_nets *net = NULL;
5505 uint8_t *signature = NULL;
5506 int cnt_inits_to = 0;
5507 uint16_t his_limit, i_want;
5509 int nat_friendly = 0;
5512 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5519 if ((asoc != NULL) &&
5520 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5521 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5523 * new addresses, out of here in non-cookie-wait
5526 * Send an ABORT, without the new address error
5527 * cause. This looks no different than if no
5528 * listener was present.
5530 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5532 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5533 mflowtype, mflowid, inp->fibnum,
5537 if (src_net != NULL && (src_net->port != port)) {
5539 * change of remote encapsulation port, out of here
5540 * in non-cookie-wait states
5542 * Send an ABORT, without an specific error cause.
5543 * This looks no different than if no listener was
5546 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5547 "Remote encapsulation port changed");
5548 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5549 mflowtype, mflowid, inp->fibnum,
5555 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5556 (offset + sizeof(struct sctp_init_chunk)),
5557 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5560 if (op_err == NULL) {
5561 char msg[SCTP_DIAG_INFO_LEN];
5563 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5564 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5567 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5568 init_chk->init.initiate_tag, op_err,
5569 mflowtype, mflowid, inp->fibnum,
5573 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5575 /* No memory, INIT timer will re-attempt. */
5577 sctp_m_freem(op_err);
5580 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5584 * We might not overwrite the identification[] completely and on
5585 * some platforms time_entered will contain some padding. Therefore
5586 * zero out the cookie to avoid putting uninitialized memory on the
5589 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5591 /* the time I built cookie */
5592 (void)SCTP_GETTIME_TIMEVAL(&now);
5593 stc.time_entered.tv_sec = now.tv_sec;
5594 stc.time_entered.tv_usec = now.tv_usec;
5596 /* populate any tie tags */
5598 /* unlock before tag selections */
5599 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5600 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5601 stc.cookie_life = asoc->cookie_life;
5602 net = asoc->primary_destination;
5604 stc.tie_tag_my_vtag = 0;
5605 stc.tie_tag_peer_vtag = 0;
5606 /* life I will award this cookie */
5607 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5610 /* copy in the ports for later check */
5611 stc.myport = sh->dest_port;
5612 stc.peerport = sh->src_port;
5615 * If we wanted to honor cookie life extensions, we would add to
5616 * stc.cookie_life. For now we should NOT honor any extension
5618 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5619 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5620 stc.ipv6_addr_legal = 1;
5621 if (SCTP_IPV6_V6ONLY(inp)) {
5622 stc.ipv4_addr_legal = 0;
5624 stc.ipv4_addr_legal = 1;
5627 stc.ipv6_addr_legal = 0;
5628 stc.ipv4_addr_legal = 1;
5633 switch (dst->sa_family) {
5637 /* lookup address */
5638 stc.address[0] = src4->sin_addr.s_addr;
5642 stc.addr_type = SCTP_IPV4_ADDRESS;
5643 /* local from address */
5644 stc.laddress[0] = dst4->sin_addr.s_addr;
5645 stc.laddress[1] = 0;
5646 stc.laddress[2] = 0;
5647 stc.laddress[3] = 0;
5648 stc.laddr_type = SCTP_IPV4_ADDRESS;
5649 /* scope_id is only for v6 */
5651 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5652 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5655 /* Must use the address in this case */
5656 if (sctp_is_address_on_local_host(src, vrf_id)) {
5657 stc.loopback_scope = 1;
5660 stc.local_scope = 0;
5668 stc.addr_type = SCTP_IPV6_ADDRESS;
5669 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5670 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5671 if (sctp_is_address_on_local_host(src, vrf_id)) {
5672 stc.loopback_scope = 1;
5673 stc.local_scope = 0;
5676 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5677 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5679 * If the new destination or source
5680 * is a LINK_LOCAL we must have
5681 * common both site and local scope.
5682 * Don't set local scope though
5683 * since we must depend on the
5684 * source to be added implicitly. We
5685 * cannot assure just because we
5686 * share one link that all links are
5689 stc.local_scope = 0;
5693 * we start counting for the private
5694 * address stuff at 1. since the
5695 * link local we source from won't
5696 * show up in our scoped count.
5700 * pull out the scope_id from
5703 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5704 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5706 * If the new destination or source
5707 * is SITE_LOCAL then we must have
5708 * site scope in common.
5712 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5713 stc.laddr_type = SCTP_IPV6_ADDRESS;
5723 /* set the scope per the existing tcb */
5726 struct sctp_nets *lnet;
5729 stc.loopback_scope = asoc->scope.loopback_scope;
5730 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5731 stc.site_scope = asoc->scope.site_scope;
5732 stc.local_scope = asoc->scope.local_scope;
5734 /* Why do we not consider IPv4 LL addresses? */
5735 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5736 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5737 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5739 * if we have a LL address, start
5747 /* use the net pointer */
5748 to = (struct sockaddr *)&net->ro._l_addr;
5749 switch (to->sa_family) {
5752 sin = (struct sockaddr_in *)to;
5753 stc.address[0] = sin->sin_addr.s_addr;
5757 stc.addr_type = SCTP_IPV4_ADDRESS;
5758 if (net->src_addr_selected == 0) {
5760 * strange case here, the INIT should have
5761 * did the selection.
5763 net->ro._s_addr = sctp_source_address_selection(inp,
5764 stcb, (sctp_route_t *)&net->ro,
5766 if (net->ro._s_addr == NULL)
5769 net->src_addr_selected = 1;
5772 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5773 stc.laddress[1] = 0;
5774 stc.laddress[2] = 0;
5775 stc.laddress[3] = 0;
5776 stc.laddr_type = SCTP_IPV4_ADDRESS;
5777 /* scope_id is only for v6 */
5783 sin6 = (struct sockaddr_in6 *)to;
5784 memcpy(&stc.address, &sin6->sin6_addr,
5785 sizeof(struct in6_addr));
5786 stc.addr_type = SCTP_IPV6_ADDRESS;
5787 stc.scope_id = sin6->sin6_scope_id;
5788 if (net->src_addr_selected == 0) {
5790 * strange case here, the INIT should have
5791 * done the selection.
5793 net->ro._s_addr = sctp_source_address_selection(inp,
5794 stcb, (sctp_route_t *)&net->ro,
5796 if (net->ro._s_addr == NULL)
5799 net->src_addr_selected = 1;
5801 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5802 sizeof(struct in6_addr));
5803 stc.laddr_type = SCTP_IPV6_ADDRESS;
5808 /* Now lets put the SCTP header in place */
5809 initack = mtod(m, struct sctp_init_ack_chunk *);
5810 /* Save it off for quick ref */
5811 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5813 memcpy(stc.identification, SCTP_VERSION_STRING,
5814 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5815 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5816 /* now the chunk header */
5817 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5818 initack->ch.chunk_flags = 0;
5819 /* fill in later from mbuf we build */
5820 initack->ch.chunk_length = 0;
5821 /* place in my tag */
5822 if ((asoc != NULL) &&
5823 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5824 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5825 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5826 /* re-use the v-tags and init-seq here */
5827 initack->init.initiate_tag = htonl(asoc->my_vtag);
5828 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5830 uint32_t vtag, itsn;
5833 atomic_add_int(&asoc->refcnt, 1);
5834 SCTP_TCB_UNLOCK(stcb);
5836 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5837 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5839 * Got a duplicate vtag on some guy behind a
5840 * nat make sure we don't use it.
5844 initack->init.initiate_tag = htonl(vtag);
5845 /* get a TSN to use too */
5846 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5847 initack->init.initial_tsn = htonl(itsn);
5848 SCTP_TCB_LOCK(stcb);
5849 atomic_add_int(&asoc->refcnt, -1);
5851 SCTP_INP_INCR_REF(inp);
5852 SCTP_INP_RUNLOCK(inp);
5853 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5854 initack->init.initiate_tag = htonl(vtag);
5855 /* get a TSN to use too */
5856 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5857 SCTP_INP_RLOCK(inp);
5858 SCTP_INP_DECR_REF(inp);
5861 /* save away my tag to */
5862 stc.my_vtag = initack->init.initiate_tag;
5864 /* set up some of the credits. */
5865 so = inp->sctp_socket;
5867 /* memory problem */
5871 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5873 /* set what I want */
5874 his_limit = ntohs(init_chk->init.num_inbound_streams);
5875 /* choose what I want */
5877 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5878 i_want = asoc->streamoutcnt;
5880 i_want = asoc->pre_open_streams;
5883 i_want = inp->sctp_ep.pre_open_stream_count;
5885 if (his_limit < i_want) {
5886 /* I Want more :< */
5887 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5889 /* I can have what I want :> */
5890 initack->init.num_outbound_streams = htons(i_want);
5892 /* tell him his limit. */
5893 initack->init.num_inbound_streams =
5894 htons(inp->sctp_ep.max_open_streams_intome);
5896 /* adaptation layer indication parameter */
5897 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5898 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5899 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5900 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5901 ali->ph.param_length = htons(parameter_len);
5902 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5903 chunk_len += parameter_len;
5906 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5907 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5908 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5909 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5910 ph->param_type = htons(SCTP_ECN_CAPABLE);
5911 ph->param_length = htons(parameter_len);
5912 chunk_len += parameter_len;
5914 /* PR-SCTP supported parameter */
5915 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5916 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5917 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5918 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5919 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5920 ph->param_length = htons(parameter_len);
5921 chunk_len += parameter_len;
5923 /* Add NAT friendly parameter */
5925 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5926 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5927 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5928 ph->param_length = htons(parameter_len);
5929 chunk_len += parameter_len;
5931 /* And now tell the peer which extensions we support */
5933 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5934 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5935 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5936 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5937 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5938 ((asoc == NULL) && (inp->idata_supported == 1))) {
5939 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5942 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5943 ((asoc == NULL) && (inp->auth_supported == 1))) {
5944 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5946 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5947 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5948 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5949 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5951 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5952 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5953 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5955 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5956 ((asoc == NULL) && (inp->idata_supported == 1))) {
5957 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5959 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5960 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5963 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5964 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5965 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5968 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5969 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5970 pr_supported->ph.param_length = htons(parameter_len);
5971 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5972 chunk_len += parameter_len;
5974 /* add authentication parameters */
5975 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5976 ((asoc == NULL) && (inp->auth_supported == 1))) {
5977 struct sctp_auth_random *randp;
5978 struct sctp_auth_hmac_algo *hmacs;
5979 struct sctp_auth_chunk_list *chunks;
5981 if (padding_len > 0) {
5982 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5983 chunk_len += padding_len;
5986 /* generate and add RANDOM parameter */
5987 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5988 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
5989 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5990 randp->ph.param_type = htons(SCTP_RANDOM);
5991 randp->ph.param_length = htons(parameter_len);
5992 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5993 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5994 chunk_len += parameter_len;
5996 if (padding_len > 0) {
5997 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5998 chunk_len += padding_len;
6001 /* add HMAC_ALGO parameter */
6002 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6003 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6004 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6005 (uint8_t *)hmacs->hmac_ids);
6006 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6007 hmacs->ph.param_length = htons(parameter_len);
6008 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6009 chunk_len += parameter_len;
6011 if (padding_len > 0) {
6012 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6013 chunk_len += padding_len;
6016 /* add CHUNKS parameter */
6017 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6018 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6019 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6020 chunks->chunk_types);
6021 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6022 chunks->ph.param_length = htons(parameter_len);
6023 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6024 chunk_len += parameter_len;
6026 SCTP_BUF_LEN(m) = chunk_len;
6028 /* now the addresses */
6030 * To optimize this we could put the scoping stuff into a structure
6031 * and remove the individual uint8's from the stc structure. Then we
6032 * could just sifa in the address within the stc.. but for now this
6033 * is a quick hack to get the address stuff teased apart.
6035 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6036 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6037 scp.loopback_scope = stc.loopback_scope;
6038 scp.ipv4_local_scope = stc.ipv4_scope;
6039 scp.local_scope = stc.local_scope;
6040 scp.site_scope = stc.site_scope;
6041 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6043 &padding_len, &chunk_len);
6044 /* padding_len can only be positive, if no addresses have been added */
6045 if (padding_len > 0) {
6046 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6047 chunk_len += padding_len;
6048 SCTP_BUF_LEN(m) += padding_len;
6051 /* tack on the operational error if present */
6054 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6055 parameter_len += SCTP_BUF_LEN(m_tmp);
6057 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6058 SCTP_BUF_NEXT(m_last) = op_err;
6059 while (SCTP_BUF_NEXT(m_last) != NULL) {
6060 m_last = SCTP_BUF_NEXT(m_last);
6062 chunk_len += parameter_len;
6064 if (padding_len > 0) {
6065 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6066 if (m_last == NULL) {
6067 /* Houston we have a problem, no space */
6071 chunk_len += padding_len;
6074 /* Now we must build a cookie */
6075 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6076 if (m_cookie == NULL) {
6077 /* memory problem */
6081 /* Now append the cookie to the end and update the space/size */
6082 SCTP_BUF_NEXT(m_last) = m_cookie;
6084 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6085 parameter_len += SCTP_BUF_LEN(m_tmp);
6086 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6090 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6091 chunk_len += parameter_len;
6094 * Place in the size, but we don't include the last pad (if any) in
6097 initack->ch.chunk_length = htons(chunk_len);
6100 * Time to sign the cookie, we don't sign over the cookie signature
6101 * though thus we set trailer.
6103 (void)sctp_hmac_m(SCTP_HMAC,
6104 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6105 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6106 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6108 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6109 * here since the timer will drive a retranmission.
6111 if (padding_len > 0) {
6112 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6117 if (stc.loopback_scope) {
6118 over_addr = (union sctp_sockstore *)dst;
6123 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6125 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6128 SCTP_SO_NOT_LOCKED))) {
6129 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6130 if (error == ENOBUFS) {
6132 asoc->ifp_had_enobuf = 1;
6134 SCTP_STAT_INCR(sctps_lowlevelerr);
6138 asoc->ifp_had_enobuf = 0;
6141 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6146 sctp_prune_prsctp(struct sctp_tcb *stcb,
6147 struct sctp_association *asoc,
6148 struct sctp_sndrcvinfo *srcv,
6152 struct sctp_tmit_chunk *chk, *nchk;
6154 SCTP_TCB_LOCK_ASSERT(stcb);
6155 if ((asoc->prsctp_supported) &&
6156 (asoc->sent_queue_cnt_removeable > 0)) {
6157 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6159 * Look for chunks marked with the PR_SCTP flag AND
6160 * the buffer space flag. If the one being sent is
6161 * equal or greater priority then purge the old one
6162 * and free some space.
6164 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6166 * This one is PR-SCTP AND buffer space
6169 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6171 * Lower numbers equates to higher
6172 * priority so if the one we are
6173 * looking at has a larger or equal
6174 * priority we want to drop the data
6175 * and NOT retransmit it.
6179 * We release the book_size
6180 * if the mbuf is here
6185 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6189 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6192 freed_spc += ret_spc;
6193 if (freed_spc >= dataout) {
6196 } /* if chunk was present */
6197 } /* if of sufficient priority */
6198 } /* if chunk has enabled */
6199 } /* tailqforeach */
6201 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6202 /* Here we must move to the sent queue and mark */
6203 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6204 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6207 * We release the book_size
6208 * if the mbuf is here
6212 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6215 freed_spc += ret_spc;
6216 if (freed_spc >= dataout) {
6219 } /* end if chk->data */
6220 } /* end if right class */
6221 } /* end if chk pr-sctp */
6222 } /* tailqforeachsafe (chk) */
6223 } /* if enabled in asoc */
6227 sctp_get_frag_point(struct sctp_tcb *stcb,
6228 struct sctp_association *asoc)
6233 * For endpoints that have both v6 and v4 addresses we must reserve
6234 * room for the ipv6 header, for those that are only dealing with V4
6235 * we use a larger frag point.
6237 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6238 ovh = SCTP_MIN_OVERHEAD;
6240 ovh = SCTP_MIN_V4_OVERHEAD;
6242 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6243 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6244 siz = asoc->smallest_mtu - ovh;
6246 siz = (stcb->asoc.sctp_frag_point - ovh);
6248 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6250 /* A data chunk MUST fit in a cluster */
6251 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6254 /* adjust for an AUTH chunk if DATA requires auth */
6255 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6256 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6259 /* make it an even word boundary please */
6266 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6269 * We assume that the user wants PR_SCTP_TTL if the user provides a
6270 * positive lifetime but does not specify any PR_SCTP policy.
6272 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6273 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6274 } else if (sp->timetolive > 0) {
6275 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6276 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6280 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6281 case CHUNK_FLAGS_PR_SCTP_BUF:
6283 * Time to live is a priority stored in tv_sec when doing
6284 * the buffer drop thing.
6286 sp->ts.tv_sec = sp->timetolive;
6289 case CHUNK_FLAGS_PR_SCTP_TTL:
6293 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6294 tv.tv_sec = sp->timetolive / 1000;
6295 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6297 * TODO sctp_constants.h needs alternative time
6298 * macros when _KERNEL is undefined.
6300 timevaladd(&sp->ts, &tv);
6303 case CHUNK_FLAGS_PR_SCTP_RTX:
6305 * Time to live is a the number or retransmissions stored in
6308 sp->ts.tv_sec = sp->timetolive;
6312 SCTPDBG(SCTP_DEBUG_USRREQ1,
6313 "Unknown PR_SCTP policy %u.\n",
6314 PR_SCTP_POLICY(sp->sinfo_flags));
6320 sctp_msg_append(struct sctp_tcb *stcb,
6321 struct sctp_nets *net,
6323 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6327 struct sctp_stream_queue_pending *sp = NULL;
6328 struct sctp_stream_out *strm;
6331 * Given an mbuf chain, put it into the association send queue and
6332 * place it on the wheel
6334 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6335 /* Invalid stream number */
6336 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6340 if ((stcb->asoc.stream_locked) &&
6341 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6342 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6346 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6347 /* Now can we send this? */
6348 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6349 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6350 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6351 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6352 /* got data while shutting down */
6353 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6357 sctp_alloc_a_strmoq(stcb, sp);
6359 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6363 sp->sinfo_flags = srcv->sinfo_flags;
6364 sp->timetolive = srcv->sinfo_timetolive;
6365 sp->ppid = srcv->sinfo_ppid;
6366 sp->context = srcv->sinfo_context;
6368 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6370 atomic_add_int(&sp->net->ref_count, 1);
6374 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6375 sp->sid = srcv->sinfo_stream;
6376 sp->msg_is_complete = 1;
6377 sp->sender_all_done = 1;
6380 sp->tail_mbuf = NULL;
6381 sctp_set_prsctp_policy(sp);
6383 * We could in theory (for sendall) sifa the length in, but we would
6384 * still have to hunt through the chain since we need to setup the
6388 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6389 if (SCTP_BUF_NEXT(at) == NULL)
6391 sp->length += SCTP_BUF_LEN(at);
6393 if (srcv->sinfo_keynumber_valid) {
6394 sp->auth_keyid = srcv->sinfo_keynumber;
6396 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6398 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6399 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6400 sp->holds_key_ref = 1;
6402 if (hold_stcb_lock == 0) {
6403 SCTP_TCB_SEND_LOCK(stcb);
6405 sctp_snd_sb_alloc(stcb, sp->length);
6406 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6407 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6408 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6410 if (hold_stcb_lock == 0) {
6411 SCTP_TCB_SEND_UNLOCK(stcb);
6421 static struct mbuf *
6422 sctp_copy_mbufchain(struct mbuf *clonechain,
6423 struct mbuf *outchain,
6424 struct mbuf **endofchain,
6427 uint8_t copy_by_ref)
6430 struct mbuf *appendchain;
6434 if (endofchain == NULL) {
6438 sctp_m_freem(outchain);
6441 if (can_take_mbuf) {
6442 appendchain = clonechain;
6445 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6447 /* Its not in a cluster */
6448 if (*endofchain == NULL) {
6449 /* lets get a mbuf cluster */
6450 if (outchain == NULL) {
6451 /* This is the general case */
6453 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6454 if (outchain == NULL) {
6457 SCTP_BUF_LEN(outchain) = 0;
6458 *endofchain = outchain;
6459 /* get the prepend space */
6460 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6463 * We really should not get a NULL
6469 if (SCTP_BUF_NEXT(m) == NULL) {
6473 m = SCTP_BUF_NEXT(m);
6476 if (*endofchain == NULL) {
6478 * huh, TSNH XXX maybe we
6481 sctp_m_freem(outchain);
6485 /* get the new end of length */
6486 len = (int)M_TRAILINGSPACE(*endofchain);
6488 /* how much is left at the end? */
6489 len = (int)M_TRAILINGSPACE(*endofchain);
6491 /* Find the end of the data, for appending */
6492 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6494 /* Now lets copy it out */
6495 if (len >= sizeofcpy) {
6496 /* It all fits, copy it in */
6497 m_copydata(clonechain, 0, sizeofcpy, cp);
6498 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6500 /* fill up the end of the chain */
6502 m_copydata(clonechain, 0, len, cp);
6503 SCTP_BUF_LEN((*endofchain)) += len;
6504 /* now we need another one */
6507 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6512 SCTP_BUF_NEXT((*endofchain)) = m;
6514 cp = mtod((*endofchain), caddr_t);
6515 m_copydata(clonechain, len, sizeofcpy, cp);
6516 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6520 /* copy the old fashion way */
6521 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6522 #ifdef SCTP_MBUF_LOGGING
6523 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6524 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6529 if (appendchain == NULL) {
6532 sctp_m_freem(outchain);
6536 /* tack on to the end */
6537 if (*endofchain != NULL) {
6538 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6542 if (SCTP_BUF_NEXT(m) == NULL) {
6543 SCTP_BUF_NEXT(m) = appendchain;
6546 m = SCTP_BUF_NEXT(m);
6550 * save off the end and update the end-chain position
6554 if (SCTP_BUF_NEXT(m) == NULL) {
6558 m = SCTP_BUF_NEXT(m);
6562 /* save off the end and update the end-chain position */
6565 if (SCTP_BUF_NEXT(m) == NULL) {
6569 m = SCTP_BUF_NEXT(m);
6571 return (appendchain);
6576 sctp_med_chunk_output(struct sctp_inpcb *inp,
6577 struct sctp_tcb *stcb,
6578 struct sctp_association *asoc,
6581 int control_only, int from_where,
6582 struct timeval *now, int *now_filled, int frag_point, int so_locked
6583 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6589 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6590 uint32_t val SCTP_UNUSED)
6592 struct sctp_copy_all *ca;
6595 int added_control = 0;
6596 int un_sent, do_chunk_output = 1;
6597 struct sctp_association *asoc;
6598 struct sctp_nets *net;
6600 ca = (struct sctp_copy_all *)ptr;
6601 if (ca->m == NULL) {
6604 if (ca->inp != inp) {
6608 if (ca->sndlen > 0) {
6609 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6611 /* can't copy so we are done */
6615 #ifdef SCTP_MBUF_LOGGING
6616 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6617 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6623 SCTP_TCB_LOCK_ASSERT(stcb);
6624 if (stcb->asoc.alternate) {
6625 net = stcb->asoc.alternate;
6627 net = stcb->asoc.primary_destination;
6629 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6630 /* Abort this assoc with m as the user defined reason */
6632 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6634 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6635 0, M_NOWAIT, 1, MT_DATA);
6636 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6639 struct sctp_paramhdr *ph;
6641 ph = mtod(m, struct sctp_paramhdr *);
6642 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6643 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6646 * We add one here to keep the assoc from dis-appearing on
6649 atomic_add_int(&stcb->asoc.refcnt, 1);
6650 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6652 * sctp_abort_an_association calls sctp_free_asoc() free
6653 * association will NOT free it since we incremented the
6654 * refcnt .. we do this to prevent it being freed and things
6655 * getting tricky since we could end up (from free_asoc)
6656 * calling inpcb_free which would get a recursive lock call
6657 * to the iterator lock.. But as a consequence of that the
6658 * stcb will return to us un-locked.. since free_asoc
6659 * returns with either no TCB or the TCB unlocked, we must
6660 * relock.. to unlock in the iterator timer :-0
6662 SCTP_TCB_LOCK(stcb);
6663 atomic_add_int(&stcb->asoc.refcnt, -1);
6664 goto no_chunk_output;
6667 ret = sctp_msg_append(stcb, net, m,
6671 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6672 /* shutdown this assoc */
6673 if (TAILQ_EMPTY(&asoc->send_queue) &&
6674 TAILQ_EMPTY(&asoc->sent_queue) &&
6675 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6676 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6680 * there is nothing queued to send, so I'm
6683 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6684 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6685 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6687 * only send SHUTDOWN the first time
6690 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6691 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6693 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6694 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6695 sctp_stop_timers_for_shutdown(stcb);
6696 sctp_send_shutdown(stcb, net);
6697 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6699 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6700 asoc->primary_destination);
6702 do_chunk_output = 0;
6706 * we still got (or just got) data to send,
6707 * so set SHUTDOWN_PENDING
6710 * XXX sockets draft says that SCTP_EOF
6711 * should be sent with no data. currently,
6712 * we will allow user data to be sent first
6713 * and move to SHUTDOWN-PENDING
6715 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6716 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6717 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6718 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6719 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6721 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6722 if (TAILQ_EMPTY(&asoc->send_queue) &&
6723 TAILQ_EMPTY(&asoc->sent_queue) &&
6724 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6725 struct mbuf *op_err;
6726 char msg[SCTP_DIAG_INFO_LEN];
6729 snprintf(msg, sizeof(msg),
6730 "%s:%d at %s", __FILE__, __LINE__, __func__);
6731 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6733 atomic_add_int(&stcb->asoc.refcnt, 1);
6734 sctp_abort_an_association(stcb->sctp_ep, stcb,
6735 op_err, SCTP_SO_NOT_LOCKED);
6736 atomic_add_int(&stcb->asoc.refcnt, -1);
6737 goto no_chunk_output;
6739 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6740 asoc->primary_destination);
6746 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6747 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6749 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6750 (stcb->asoc.total_flight > 0) &&
6751 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6752 do_chunk_output = 0;
6754 if (do_chunk_output)
6755 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6756 else if (added_control) {
6757 int num_out, reason, now_filled = 0;
6761 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6762 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6763 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6774 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6776 struct sctp_copy_all *ca;
6778 ca = (struct sctp_copy_all *)ptr;
6780 * Do a notify here? Kacheong suggests that the notify be done at
6781 * the send time.. so you would push up a notification if any send
6782 * failed. Don't know if this is feasible since the only failures we
6783 * have is "memory" related and if you cannot get an mbuf to send
6784 * the data you surely can't get an mbuf to send up to notify the
6785 * user you can't send the data :->
6788 /* now free everything */
6789 sctp_m_freem(ca->m);
6790 SCTP_FREE(ca, SCTP_M_COPYAL);
6793 static struct mbuf *
6794 sctp_copy_out_all(struct uio *uio, int len)
6796 struct mbuf *ret, *at;
6797 int left, willcpy, cancpy, error;
6799 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6805 SCTP_BUF_LEN(ret) = 0;
6806 /* save space for the data chunk header */
6807 cancpy = (int)M_TRAILINGSPACE(ret);
6808 willcpy = min(cancpy, left);
6811 /* Align data to the end */
6812 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6818 SCTP_BUF_LEN(at) = willcpy;
6819 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6822 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6823 if (SCTP_BUF_NEXT(at) == NULL) {
6826 at = SCTP_BUF_NEXT(at);
6827 SCTP_BUF_LEN(at) = 0;
6828 cancpy = (int)M_TRAILINGSPACE(at);
6829 willcpy = min(cancpy, left);
6836 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6837 struct sctp_sndrcvinfo *srcv)
6840 struct sctp_copy_all *ca;
6842 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6849 memset(ca, 0, sizeof(struct sctp_copy_all));
6853 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6856 * take off the sendall flag, it would be bad if we failed to do
6859 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6860 /* get length and mbuf chain */
6862 ca->sndlen = (int)uio->uio_resid;
6863 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6864 if (ca->m == NULL) {
6865 SCTP_FREE(ca, SCTP_M_COPYAL);
6866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6870 /* Gather the length of the send */
6874 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6875 ca->sndlen += SCTP_BUF_LEN(mat);
6878 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6879 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6880 SCTP_ASOC_ANY_STATE,
6882 sctp_sendall_completes, inp, 1);
6884 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6885 SCTP_FREE(ca, SCTP_M_COPYAL);
6886 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6894 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6896 struct sctp_tmit_chunk *chk, *nchk;
6898 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6899 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6900 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6901 asoc->ctrl_queue_cnt--;
6903 sctp_m_freem(chk->data);
6906 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6912 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6914 struct sctp_association *asoc;
6915 struct sctp_tmit_chunk *chk, *nchk;
6916 struct sctp_asconf_chunk *acp;
6919 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6920 /* find SCTP_ASCONF chunk in queue */
6921 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6923 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6924 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6929 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6930 asoc->ctrl_queue_cnt--;
6932 sctp_m_freem(chk->data);
6935 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6942 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6943 struct sctp_association *asoc,
6944 struct sctp_tmit_chunk **data_list,
6946 struct sctp_nets *net)
6949 struct sctp_tmit_chunk *tp1;
6951 for (i = 0; i < bundle_at; i++) {
6952 /* off of the send queue */
6953 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6954 asoc->send_queue_cnt--;
6957 * Any chunk NOT 0 you zap the time chunk 0 gets
6958 * zapped or set based on if a RTO measurment is
6961 data_list[i]->do_rtt = 0;
6964 data_list[i]->sent_rcv_time = net->last_sent_time;
6965 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6966 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6967 if (data_list[i]->whoTo == NULL) {
6968 data_list[i]->whoTo = net;
6969 atomic_add_int(&net->ref_count, 1);
6971 /* on to the sent queue */
6972 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6973 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6974 struct sctp_tmit_chunk *tpp;
6976 /* need to move back */
6978 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6980 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6984 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6987 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6989 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6994 /* This does not lower until the cum-ack passes it */
6995 asoc->sent_queue_cnt++;
6996 if ((asoc->peers_rwnd <= 0) &&
6997 (asoc->total_flight == 0) &&
6999 /* Mark the chunk as being a window probe */
7000 SCTP_STAT_INCR(sctps_windowprobed);
7002 #ifdef SCTP_AUDITING_ENABLED
7003 sctp_audit_log(0xC2, 3);
7005 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7006 data_list[i]->snd_count = 1;
7007 data_list[i]->rec.data.chunk_was_revoked = 0;
7008 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7009 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7010 data_list[i]->whoTo->flight_size,
7011 data_list[i]->book_size,
7012 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7013 data_list[i]->rec.data.tsn);
7015 sctp_flight_size_increase(data_list[i]);
7016 sctp_total_flight_increase(stcb, data_list[i]);
7017 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7018 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7019 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7021 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7022 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7023 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7024 /* SWS sender side engages */
7025 asoc->peers_rwnd = 0;
7028 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7029 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7034 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7035 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7040 struct sctp_tmit_chunk *chk, *nchk;
7042 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7043 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7044 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7045 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7046 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7047 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7048 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7049 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7050 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7051 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7052 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7053 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7054 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7055 /* Stray chunks must be cleaned up */
7057 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7058 asoc->ctrl_queue_cnt--;
7060 sctp_m_freem(chk->data);
7063 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7064 asoc->fwd_tsn_cnt--;
7066 sctp_free_a_chunk(stcb, chk, so_locked);
7067 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7068 /* special handling, we must look into the param */
7069 if (chk != asoc->str_reset) {
7070 goto clean_up_anyway;
7077 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7078 uint32_t space_left, uint32_t frag_point, int eeor_on)
7081 * Make a decision on if I should split a msg into multiple parts.
7082 * This is only asked of incomplete messages.
7086 * If we are doing EEOR we need to always send it if its the
7087 * entire thing, since it might be all the guy is putting in
7090 if (space_left >= length) {
7092 * If we have data outstanding,
7093 * we get another chance when the sack
7094 * arrives to transmit - wait for more data
7096 if (stcb->asoc.total_flight == 0) {
7098 * If nothing is in flight, we zero the
7106 /* You can fill the rest */
7107 return (space_left);
7111 * For those strange folk that make the send buffer
7112 * smaller than our fragmentation point, we can't
7113 * get a full msg in so we have to allow splitting.
7115 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7118 if ((length <= space_left) ||
7119 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7120 /* Sub-optimial residual don't split in non-eeor mode. */
7124 * If we reach here length is larger than the space_left. Do we wish
7125 * to split it for the sake of packet putting together?
7127 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7128 /* Its ok to split it */
7129 return (min(space_left, frag_point));
7131 /* Nope, can't split */
7136 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7137 struct sctp_stream_out *strq,
7138 uint32_t space_left,
7139 uint32_t frag_point,
7144 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7149 /* Move from the stream to the send_queue keeping track of the total */
7150 struct sctp_association *asoc;
7151 struct sctp_stream_queue_pending *sp;
7152 struct sctp_tmit_chunk *chk;
7153 struct sctp_data_chunk *dchkh = NULL;
7154 struct sctp_idata_chunk *ndchkh = NULL;
7155 uint32_t to_move, length;
7157 uint8_t rcv_flags = 0;
7159 uint8_t send_lock_up = 0;
7161 SCTP_TCB_LOCK_ASSERT(stcb);
7164 /* sa_ignore FREED_MEMORY */
7165 sp = TAILQ_FIRST(&strq->outqueue);
7167 if (send_lock_up == 0) {
7168 SCTP_TCB_SEND_LOCK(stcb);
7171 sp = TAILQ_FIRST(&strq->outqueue);
7175 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7176 (stcb->asoc.idata_supported == 0) &&
7177 (strq->last_msg_incomplete)) {
7178 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7180 strq->last_msg_incomplete);
7181 strq->last_msg_incomplete = 0;
7185 SCTP_TCB_SEND_UNLOCK(stcb);
7190 if ((sp->msg_is_complete) && (sp->length == 0)) {
7191 if (sp->sender_all_done) {
7193 * We are doing differed cleanup. Last time through
7194 * when we took all the data the sender_all_done was
7197 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7198 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7199 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7200 sp->sender_all_done,
7202 sp->msg_is_complete,
7206 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7207 SCTP_TCB_SEND_LOCK(stcb);
7210 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7211 TAILQ_REMOVE(&strq->outqueue, sp, next);
7212 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7213 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7214 (strq->chunks_on_queues == 0) &&
7215 TAILQ_EMPTY(&strq->outqueue)) {
7216 stcb->asoc.trigger_reset = 1;
7219 sctp_free_remote_addr(sp->net);
7223 sctp_m_freem(sp->data);
7226 sctp_free_a_strmoq(stcb, sp, so_locked);
7227 /* we can't be locked to it */
7229 SCTP_TCB_SEND_UNLOCK(stcb);
7232 /* back to get the next msg */
7236 * sender just finished this but still holds a
7244 /* is there some to get */
7245 if (sp->length == 0) {
7250 } else if (sp->discard_rest) {
7251 if (send_lock_up == 0) {
7252 SCTP_TCB_SEND_LOCK(stcb);
7255 /* Whack down the size */
7256 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7257 if ((stcb->sctp_socket != NULL) &&
7258 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7259 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7260 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7263 sctp_m_freem(sp->data);
7265 sp->tail_mbuf = NULL;
7274 some_taken = sp->some_taken;
7276 length = sp->length;
7277 if (sp->msg_is_complete) {
7278 /* The message is complete */
7279 to_move = min(length, frag_point);
7280 if (to_move == length) {
7281 /* All of it fits in the MTU */
7282 if (sp->some_taken) {
7283 rcv_flags |= SCTP_DATA_LAST_FRAG;
7285 rcv_flags |= SCTP_DATA_NOT_FRAG;
7287 sp->put_last_out = 1;
7288 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7289 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7292 /* Not all of it fits, we fragment */
7293 if (sp->some_taken == 0) {
7294 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7299 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7302 * We use a snapshot of length in case it
7303 * is expanding during the compare.
7308 if (to_move >= llen) {
7310 if (send_lock_up == 0) {
7312 * We are taking all of an incomplete msg
7313 * thus we need a send lock.
7315 SCTP_TCB_SEND_LOCK(stcb);
7317 if (sp->msg_is_complete) {
7319 * the sender finished the
7326 if (sp->some_taken == 0) {
7327 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7331 /* Nothing to take. */
7338 /* If we reach here, we can copy out a chunk */
7339 sctp_alloc_a_chunk(stcb, chk);
7341 /* No chunk memory */
7347 * Setup for unordered if needed by looking at the user sent info
7350 if (sp->sinfo_flags & SCTP_UNORDERED) {
7351 rcv_flags |= SCTP_DATA_UNORDERED;
7353 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7354 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7355 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7357 /* clear out the chunk before setting up */
7358 memset(chk, 0, sizeof(*chk));
7359 chk->rec.data.rcv_flags = rcv_flags;
7361 if (to_move >= length) {
7362 /* we think we can steal the whole thing */
7363 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7364 SCTP_TCB_SEND_LOCK(stcb);
7367 if (to_move < sp->length) {
7368 /* bail, it changed */
7371 chk->data = sp->data;
7372 chk->last_mbuf = sp->tail_mbuf;
7373 /* register the stealing */
7374 sp->data = sp->tail_mbuf = NULL;
7379 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7380 chk->last_mbuf = NULL;
7381 if (chk->data == NULL) {
7382 sp->some_taken = some_taken;
7383 sctp_free_a_chunk(stcb, chk, so_locked);
7388 #ifdef SCTP_MBUF_LOGGING
7389 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7390 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7393 /* Pull off the data */
7394 m_adj(sp->data, to_move);
7395 /* Now lets work our way down and compact it */
7397 while (m && (SCTP_BUF_LEN(m) == 0)) {
7398 sp->data = SCTP_BUF_NEXT(m);
7399 SCTP_BUF_NEXT(m) = NULL;
7400 if (sp->tail_mbuf == m) {
7402 * Freeing tail? TSNH since
7403 * we supposedly were taking less
7404 * than the sp->length.
7407 panic("Huh, freing tail? - TSNH");
7409 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7410 sp->tail_mbuf = sp->data = NULL;
7419 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7420 chk->copy_by_ref = 1;
7422 chk->copy_by_ref = 0;
7425 * get last_mbuf and counts of mb usage This is ugly but hopefully
7426 * its only one mbuf.
7428 if (chk->last_mbuf == NULL) {
7429 chk->last_mbuf = chk->data;
7430 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7431 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7434 if (to_move > length) {
7435 /*- This should not happen either
7436 * since we always lower to_move to the size
7437 * of sp->length if its larger.
7440 panic("Huh, how can to_move be larger?");
7442 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7446 atomic_subtract_int(&sp->length, to_move);
7448 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7449 if (M_LEADINGSPACE(chk->data) < leading) {
7450 /* Not enough room for a chunk header, get some */
7453 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7456 * we're in trouble here. _PREPEND below will free
7457 * all the data if there is no leading space, so we
7458 * must put the data back and restore.
7460 if (send_lock_up == 0) {
7461 SCTP_TCB_SEND_LOCK(stcb);
7464 if (sp->data == NULL) {
7465 /* unsteal the data */
7466 sp->data = chk->data;
7467 sp->tail_mbuf = chk->last_mbuf;
7471 /* reassemble the data */
7473 sp->data = chk->data;
7474 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7476 sp->some_taken = some_taken;
7477 atomic_add_int(&sp->length, to_move);
7480 sctp_free_a_chunk(stcb, chk, so_locked);
7484 SCTP_BUF_LEN(m) = 0;
7485 SCTP_BUF_NEXT(m) = chk->data;
7487 M_ALIGN(chk->data, 4);
7490 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7491 if (chk->data == NULL) {
7492 /* HELP, TSNH since we assured it would not above? */
7494 panic("prepend failes HELP?");
7496 SCTP_PRINTF("prepend fails HELP?\n");
7497 sctp_free_a_chunk(stcb, chk, so_locked);
7503 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7504 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7505 chk->book_size_scale = 0;
7506 chk->sent = SCTP_DATAGRAM_UNSENT;
7509 chk->asoc = &stcb->asoc;
7510 chk->pad_inplace = 0;
7511 chk->no_fr_allowed = 0;
7512 if (stcb->asoc.idata_supported == 0) {
7513 if (rcv_flags & SCTP_DATA_UNORDERED) {
7514 /* Just use 0. The receiver ignores the values. */
7515 chk->rec.data.mid = 0;
7517 chk->rec.data.mid = strq->next_mid_ordered;
7518 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7519 strq->next_mid_ordered++;
7523 if (rcv_flags & SCTP_DATA_UNORDERED) {
7524 chk->rec.data.mid = strq->next_mid_unordered;
7525 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7526 strq->next_mid_unordered++;
7529 chk->rec.data.mid = strq->next_mid_ordered;
7530 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7531 strq->next_mid_ordered++;
7535 chk->rec.data.sid = sp->sid;
7536 chk->rec.data.ppid = sp->ppid;
7537 chk->rec.data.context = sp->context;
7538 chk->rec.data.doing_fast_retransmit = 0;
7540 chk->rec.data.timetodrop = sp->ts;
7541 chk->flags = sp->act_flags;
7544 chk->whoTo = sp->net;
7545 atomic_add_int(&chk->whoTo->ref_count, 1);
7549 if (sp->holds_key_ref) {
7550 chk->auth_keyid = sp->auth_keyid;
7551 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7552 chk->holds_key_ref = 1;
7554 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7555 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7556 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7557 (uint32_t)(uintptr_t)stcb, sp->length,
7558 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7561 if (stcb->asoc.idata_supported == 0) {
7562 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7564 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7567 * Put the rest of the things in place now. Size was done earlier in
7568 * previous loop prior to padding.
7571 #ifdef SCTP_ASOCLOG_OF_TSNS
7572 SCTP_TCB_LOCK_ASSERT(stcb);
7573 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7574 asoc->tsn_out_at = 0;
7575 asoc->tsn_out_wrapped = 1;
7577 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7578 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7579 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7580 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7581 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7582 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7583 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7584 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7587 if (stcb->asoc.idata_supported == 0) {
7588 dchkh->ch.chunk_type = SCTP_DATA;
7589 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7590 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7591 dchkh->dp.sid = htons(strq->sid);
7592 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7593 dchkh->dp.ppid = chk->rec.data.ppid;
7594 dchkh->ch.chunk_length = htons(chk->send_size);
7596 ndchkh->ch.chunk_type = SCTP_IDATA;
7597 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7598 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7599 ndchkh->dp.sid = htons(strq->sid);
7600 ndchkh->dp.reserved = htons(0);
7601 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7603 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7605 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7607 ndchkh->ch.chunk_length = htons(chk->send_size);
7609 /* Now advance the chk->send_size by the actual pad needed. */
7610 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7615 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7616 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7618 chk->last_mbuf = lm;
7619 chk->pad_inplace = 1;
7621 chk->send_size += pads;
7623 if (PR_SCTP_ENABLED(chk->flags)) {
7624 asoc->pr_sctp_cnt++;
7626 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7627 /* All done pull and kill the message */
7628 if (sp->put_last_out == 0) {
7629 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7630 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7631 sp->sender_all_done,
7633 sp->msg_is_complete,
7637 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7638 SCTP_TCB_SEND_LOCK(stcb);
7641 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7642 TAILQ_REMOVE(&strq->outqueue, sp, next);
7643 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7644 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7645 (strq->chunks_on_queues == 0) &&
7646 TAILQ_EMPTY(&strq->outqueue)) {
7647 stcb->asoc.trigger_reset = 1;
7650 sctp_free_remote_addr(sp->net);
7654 sctp_m_freem(sp->data);
7657 sctp_free_a_strmoq(stcb, sp, so_locked);
7659 asoc->chunks_on_out_queue++;
7660 strq->chunks_on_queues++;
7661 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7662 asoc->send_queue_cnt++;
7665 SCTP_TCB_SEND_UNLOCK(stcb);
7672 sctp_fill_outqueue(struct sctp_tcb *stcb,
7673 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7674 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7679 struct sctp_association *asoc;
7680 struct sctp_stream_out *strq;
7681 uint32_t space_left, moved, total_moved;
7684 SCTP_TCB_LOCK_ASSERT(stcb);
7687 switch (net->ro._l_addr.sa.sa_family) {
7690 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7695 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7700 space_left = net->mtu;
7703 /* Need an allowance for the data chunk header too */
7704 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7706 /* must make even word boundary */
7707 space_left &= 0xfffffffc;
7708 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7711 while ((space_left > 0) && (strq != NULL)) {
7712 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7713 &giveup, eeor_mode, &bail, so_locked);
7714 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7715 if ((giveup != 0) || (bail != 0)) {
7718 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7719 total_moved += moved;
7720 space_left -= moved;
7721 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7722 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7726 space_left &= 0xfffffffc;
7731 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7733 if (total_moved == 0) {
7734 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7735 (net == stcb->asoc.primary_destination)) {
7736 /* ran dry for primary network net */
7737 SCTP_STAT_INCR(sctps_primary_randry);
7738 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7739 /* ran dry with CMT on */
7740 SCTP_STAT_INCR(sctps_cmt_randry);
7746 sctp_fix_ecn_echo(struct sctp_association *asoc)
7748 struct sctp_tmit_chunk *chk;
7750 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7751 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7752 chk->sent = SCTP_DATAGRAM_UNSENT;
7758 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7760 struct sctp_association *asoc;
7761 struct sctp_tmit_chunk *chk;
7762 struct sctp_stream_queue_pending *sp;
7769 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7770 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7771 if (sp->net == net) {
7772 sctp_free_remote_addr(sp->net);
7777 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7778 if (chk->whoTo == net) {
7779 sctp_free_remote_addr(chk->whoTo);
7786 sctp_med_chunk_output(struct sctp_inpcb *inp,
7787 struct sctp_tcb *stcb,
7788 struct sctp_association *asoc,
7791 int control_only, int from_where,
7792 struct timeval *now, int *now_filled, int frag_point, int so_locked
7793 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7799 * Ok this is the generic chunk service queue. we must do the
7801 * - Service the stream queue that is next, moving any
7802 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7803 * LAST to the out queue in one pass) and assigning TSN's. This
7804 * only applys though if the peer does not support NDATA. For NDATA
7805 * chunks its ok to not send the entire message ;-)
7806 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7807 * fomulate and send the low level chunks. Making sure to combine
7808 * any control in the control chunk queue also.
7810 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7811 struct mbuf *outchain, *endoutchain;
7812 struct sctp_tmit_chunk *chk, *nchk;
7814 /* temp arrays for unlinking */
7815 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7816 int no_fragmentflg, error;
7817 unsigned int max_rwnd_per_dest, max_send_per_dest;
7818 int one_chunk, hbflag, skip_data_for_this_net;
7819 int asconf, cookie, no_out_cnt;
7820 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7821 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7823 uint32_t auth_offset = 0;
7824 struct sctp_auth_chunk *auth = NULL;
7825 uint16_t auth_keyid;
7826 int override_ok = 1;
7827 int skip_fill_up = 0;
7828 int data_auth_reqd = 0;
7831 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7838 auth_keyid = stcb->asoc.authinfo.active_keyid;
7839 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7840 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7841 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7846 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7848 * First lets prime the pump. For each destination, if there is room
7849 * in the flight size, attempt to pull an MTU's worth out of the
7850 * stream queues into the general send_queue
7852 #ifdef SCTP_AUDITING_ENABLED
7853 sctp_audit_log(0xC2, 2);
7855 SCTP_TCB_LOCK_ASSERT(stcb);
7862 /* Nothing to possible to send? */
7863 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7864 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7865 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7866 TAILQ_EMPTY(&asoc->send_queue) &&
7867 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7872 if (asoc->peers_rwnd == 0) {
7873 /* No room in peers rwnd */
7875 if (asoc->total_flight > 0) {
7876 /* we are allowed one chunk in flight */
7880 if (stcb->asoc.ecn_echo_cnt_onq) {
7881 /* Record where a sack goes, if any */
7882 if (no_data_chunks &&
7883 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7884 /* Nothing but ECNe to send - we don't do that */
7885 goto nothing_to_send;
7887 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7888 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7889 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7890 sack_goes_to = chk->whoTo;
7895 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7896 if (stcb->sctp_socket)
7897 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7899 max_send_per_dest = 0;
7900 if (no_data_chunks == 0) {
7901 /* How many non-directed chunks are there? */
7902 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7903 if (chk->whoTo == NULL) {
7905 * We already have non-directed chunks on
7906 * the queue, no need to do a fill-up.
7914 if ((no_data_chunks == 0) &&
7915 (skip_fill_up == 0) &&
7916 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7917 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7919 * This for loop we are in takes in each net, if
7920 * its's got space in cwnd and has data sent to it
7921 * (when CMT is off) then it calls
7922 * sctp_fill_outqueue for the net. This gets data on
7923 * the send queue for that network.
7925 * In sctp_fill_outqueue TSN's are assigned and data
7926 * is copied out of the stream buffers. Note mostly
7927 * copy by reference (we hope).
7929 net->window_probe = 0;
7930 if ((net != stcb->asoc.alternate) &&
7931 ((net->dest_state & SCTP_ADDR_PF) ||
7932 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7933 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7934 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7935 sctp_log_cwnd(stcb, net, 1,
7936 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7940 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7941 (net->flight_size == 0)) {
7942 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7944 if (net->flight_size >= net->cwnd) {
7945 /* skip this network, no room - can't fill */
7946 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7947 sctp_log_cwnd(stcb, net, 3,
7948 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7952 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7953 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7955 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7957 /* memory alloc failure */
7963 /* now service each destination and send out what we can for it */
7964 /* Nothing to send? */
7965 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7966 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7967 TAILQ_EMPTY(&asoc->send_queue)) {
7971 if (asoc->sctp_cmt_on_off > 0) {
7972 /* get the last start point */
7973 start_at = asoc->last_net_cmt_send_started;
7974 if (start_at == NULL) {
7975 /* null so to beginning */
7976 start_at = TAILQ_FIRST(&asoc->nets);
7978 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7979 if (start_at == NULL) {
7980 start_at = TAILQ_FIRST(&asoc->nets);
7983 asoc->last_net_cmt_send_started = start_at;
7985 start_at = TAILQ_FIRST(&asoc->nets);
7987 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7988 if (chk->whoTo == NULL) {
7989 if (asoc->alternate) {
7990 chk->whoTo = asoc->alternate;
7992 chk->whoTo = asoc->primary_destination;
7994 atomic_add_int(&chk->whoTo->ref_count, 1);
7997 old_start_at = NULL;
7998 again_one_more_time:
7999 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8000 /* how much can we send? */
8001 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8002 if (old_start_at && (old_start_at == net)) {
8003 /* through list ocmpletely. */
8007 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8008 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8009 (net->flight_size >= net->cwnd)) {
8011 * Nothing on control or asconf and flight is full,
8012 * we can skip even in the CMT case.
8017 endoutchain = outchain = NULL;
8020 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8021 skip_data_for_this_net = 1;
8023 skip_data_for_this_net = 0;
8025 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8028 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8033 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8043 if (mtu > asoc->peers_rwnd) {
8044 if (asoc->total_flight > 0) {
8045 /* We have a packet in flight somewhere */
8046 r_mtu = asoc->peers_rwnd;
8048 /* We are always allowed to send one MTU out */
8056 /************************/
8057 /* ASCONF transmission */
8058 /************************/
8059 /* Now first lets go through the asconf queue */
8060 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8061 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8064 if (chk->whoTo == NULL) {
8065 if (asoc->alternate == NULL) {
8066 if (asoc->primary_destination != net) {
8070 if (asoc->alternate != net) {
8075 if (chk->whoTo != net) {
8079 if (chk->data == NULL) {
8082 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8083 chk->sent != SCTP_DATAGRAM_RESEND) {
8087 * if no AUTH is yet included and this chunk
8088 * requires it, make sure to account for it. We
8089 * don't apply the size until the AUTH chunk is
8090 * actually added below in case there is no room for
8091 * this chunk. NOTE: we overload the use of "omtu"
8094 if ((auth == NULL) &&
8095 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8096 stcb->asoc.peer_auth_chunks)) {
8097 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8100 /* Here we do NOT factor the r_mtu */
8101 if ((chk->send_size < (int)(mtu - omtu)) ||
8102 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8104 * We probably should glom the mbuf chain
8105 * from the chk->data for control but the
8106 * problem is it becomes yet one more level
8107 * of tracking to do if for some reason
8108 * output fails. Then I have got to
8109 * reconstruct the merged control chain.. el
8110 * yucko.. for now we take the easy way and
8114 * Add an AUTH chunk, if chunk requires it
8115 * save the offset into the chain for AUTH
8117 if ((auth == NULL) &&
8118 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8119 stcb->asoc.peer_auth_chunks))) {
8120 outchain = sctp_add_auth_chunk(outchain,
8125 chk->rec.chunk_id.id);
8126 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8128 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8129 (int)chk->rec.chunk_id.can_take_data,
8130 chk->send_size, chk->copy_by_ref);
8131 if (outchain == NULL) {
8133 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8136 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8137 /* update our MTU size */
8138 if (mtu > (chk->send_size + omtu))
8139 mtu -= (chk->send_size + omtu);
8142 to_out += (chk->send_size + omtu);
8143 /* Do clear IP_DF ? */
8144 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8147 if (chk->rec.chunk_id.can_take_data)
8150 * set hb flag since we can use these for
8156 * should sysctl this: don't bundle data
8157 * with ASCONF since it requires AUTH
8160 chk->sent = SCTP_DATAGRAM_SENT;
8161 if (chk->whoTo == NULL) {
8163 atomic_add_int(&net->ref_count, 1);
8168 * Ok we are out of room but we can
8169 * output without effecting the
8170 * flight size since this little guy
8171 * is a control only packet.
8173 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8175 * do NOT clear the asconf flag as
8176 * it is used to do appropriate
8177 * source address selection.
8179 if (*now_filled == 0) {
8180 (void)SCTP_GETTIME_TIMEVAL(now);
8183 net->last_sent_time = *now;
8185 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8186 (struct sockaddr *)&net->ro._l_addr,
8187 outchain, auth_offset, auth,
8188 stcb->asoc.authinfo.active_keyid,
8189 no_fragmentflg, 0, asconf,
8190 inp->sctp_lport, stcb->rport,
8191 htonl(stcb->asoc.peer_vtag),
8196 * error, we could not
8199 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8200 if (from_where == 0) {
8201 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8203 if (error == ENOBUFS) {
8204 asoc->ifp_had_enobuf = 1;
8205 SCTP_STAT_INCR(sctps_lowlevelerr);
8207 /* error, could not output */
8208 if (error == EHOSTUNREACH) {
8214 sctp_move_chunks_from_net(stcb, net);
8219 asoc->ifp_had_enobuf = 0;
8222 * increase the number we sent, if a
8223 * cookie is sent we don't tell them
8226 outchain = endoutchain = NULL;
8230 *num_out += ctl_cnt;
8231 /* recalc a clean slate and setup */
8232 switch (net->ro._l_addr.sa.sa_family) {
8235 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8240 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8257 /************************/
8258 /* Control transmission */
8259 /************************/
8260 /* Now first lets go through the control queue */
8261 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8262 if ((sack_goes_to) &&
8263 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8264 (chk->whoTo != sack_goes_to)) {
8266 * if we have a sack in queue, and we are
8267 * looking at an ecn echo that is NOT queued
8268 * to where the sack is going..
8270 if (chk->whoTo == net) {
8272 * Don't transmit it to where its
8273 * going (current net)
8276 } else if (sack_goes_to == net) {
8278 * But do transmit it to this
8281 goto skip_net_check;
8284 if (chk->whoTo == NULL) {
8285 if (asoc->alternate == NULL) {
8286 if (asoc->primary_destination != net) {
8290 if (asoc->alternate != net) {
8295 if (chk->whoTo != net) {
8300 if (chk->data == NULL) {
8303 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8305 * It must be unsent. Cookies and ASCONF's
8306 * hang around but there timers will force
8307 * when marked for resend.
8312 * if no AUTH is yet included and this chunk
8313 * requires it, make sure to account for it. We
8314 * don't apply the size until the AUTH chunk is
8315 * actually added below in case there is no room for
8316 * this chunk. NOTE: we overload the use of "omtu"
8319 if ((auth == NULL) &&
8320 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8321 stcb->asoc.peer_auth_chunks)) {
8322 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8325 /* Here we do NOT factor the r_mtu */
8326 if ((chk->send_size <= (int)(mtu - omtu)) ||
8327 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8329 * We probably should glom the mbuf chain
8330 * from the chk->data for control but the
8331 * problem is it becomes yet one more level
8332 * of tracking to do if for some reason
8333 * output fails. Then I have got to
8334 * reconstruct the merged control chain.. el
8335 * yucko.. for now we take the easy way and
8339 * Add an AUTH chunk, if chunk requires it
8340 * save the offset into the chain for AUTH
8342 if ((auth == NULL) &&
8343 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8344 stcb->asoc.peer_auth_chunks))) {
8345 outchain = sctp_add_auth_chunk(outchain,
8350 chk->rec.chunk_id.id);
8351 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8353 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8354 (int)chk->rec.chunk_id.can_take_data,
8355 chk->send_size, chk->copy_by_ref);
8356 if (outchain == NULL) {
8358 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8361 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8362 /* update our MTU size */
8363 if (mtu > (chk->send_size + omtu))
8364 mtu -= (chk->send_size + omtu);
8367 to_out += (chk->send_size + omtu);
8368 /* Do clear IP_DF ? */
8369 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8372 if (chk->rec.chunk_id.can_take_data)
8374 /* Mark things to be removed, if needed */
8375 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8376 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8377 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8378 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8379 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8380 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8381 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8382 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8383 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8384 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8385 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8386 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8389 /* remove these chunks at the end */
8390 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8391 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8392 /* turn off the timer */
8393 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8394 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8396 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8402 * Other chunks, since they have
8403 * timers running (i.e. COOKIE) we
8404 * just "trust" that it gets sent or
8408 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8411 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8413 * Increment ecne send count
8414 * here this means we may be
8415 * over-zealous in our
8416 * counting if the send
8417 * fails, but its the best
8418 * place to do it (we used
8419 * to do it in the queue of
8420 * the chunk, but that did
8421 * not tell how many times
8424 SCTP_STAT_INCR(sctps_sendecne);
8426 chk->sent = SCTP_DATAGRAM_SENT;
8427 if (chk->whoTo == NULL) {
8429 atomic_add_int(&net->ref_count, 1);
8435 * Ok we are out of room but we can
8436 * output without effecting the
8437 * flight size since this little guy
8438 * is a control only packet.
8441 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8443 * do NOT clear the asconf
8444 * flag as it is used to do
8445 * appropriate source
8446 * address selection.
8450 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8453 /* Only HB or ASCONF advances time */
8455 if (*now_filled == 0) {
8456 (void)SCTP_GETTIME_TIMEVAL(now);
8459 net->last_sent_time = *now;
8462 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8463 (struct sockaddr *)&net->ro._l_addr,
8466 stcb->asoc.authinfo.active_keyid,
8467 no_fragmentflg, 0, asconf,
8468 inp->sctp_lport, stcb->rport,
8469 htonl(stcb->asoc.peer_vtag),
8474 * error, we could not
8477 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8478 if (from_where == 0) {
8479 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8481 if (error == ENOBUFS) {
8482 asoc->ifp_had_enobuf = 1;
8483 SCTP_STAT_INCR(sctps_lowlevelerr);
8485 if (error == EHOSTUNREACH) {
8491 sctp_move_chunks_from_net(stcb, net);
8496 asoc->ifp_had_enobuf = 0;
8499 * increase the number we sent, if a
8500 * cookie is sent we don't tell them
8503 outchain = endoutchain = NULL;
8507 *num_out += ctl_cnt;
8508 /* recalc a clean slate and setup */
8509 switch (net->ro._l_addr.sa.sa_family) {
8512 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8517 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8534 /* JRI: if dest is in PF state, do not send data to it */
8535 if ((asoc->sctp_cmt_on_off > 0) &&
8536 (net != stcb->asoc.alternate) &&
8537 (net->dest_state & SCTP_ADDR_PF)) {
8540 if (net->flight_size >= net->cwnd) {
8543 if ((asoc->sctp_cmt_on_off > 0) &&
8544 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8545 (net->flight_size > max_rwnd_per_dest)) {
8549 * We need a specific accounting for the usage of the send
8550 * buffer. We also need to check the number of messages per
8551 * net. For now, this is better than nothing and it disabled
8554 if ((asoc->sctp_cmt_on_off > 0) &&
8555 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8556 (max_send_per_dest > 0) &&
8557 (net->flight_size > max_send_per_dest)) {
8560 /*********************/
8561 /* Data transmission */
8562 /*********************/
8564 * if AUTH for DATA is required and no AUTH has been added
8565 * yet, account for this in the mtu now... if no data can be
8566 * bundled, this adjustment won't matter anyways since the
8567 * packet will be going out...
8569 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8570 stcb->asoc.peer_auth_chunks);
8571 if (data_auth_reqd && (auth == NULL)) {
8572 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8574 /* now lets add any data within the MTU constraints */
8575 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8578 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8579 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8586 if (net->mtu > SCTP_MIN_OVERHEAD)
8587 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8597 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8598 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8599 (skip_data_for_this_net == 0)) ||
8601 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8602 if (no_data_chunks) {
8603 /* let only control go out */
8607 if (net->flight_size >= net->cwnd) {
8608 /* skip this net, no room for data */
8612 if ((chk->whoTo != NULL) &&
8613 (chk->whoTo != net)) {
8614 /* Don't send the chunk on this net */
8617 if (asoc->sctp_cmt_on_off == 0) {
8618 if ((asoc->alternate) &&
8619 (asoc->alternate != net) &&
8620 (chk->whoTo == NULL)) {
8622 } else if ((net != asoc->primary_destination) &&
8623 (asoc->alternate == NULL) &&
8624 (chk->whoTo == NULL)) {
8628 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8630 * strange, we have a chunk that is
8631 * to big for its destination and
8632 * yet no fragment ok flag.
8633 * Something went wrong when the
8634 * PMTU changed...we did not mark
8635 * this chunk for some reason?? I
8636 * will fix it here by letting IP
8637 * fragment it for now and printing
8638 * a warning. This really should not
8641 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8642 chk->send_size, mtu);
8643 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8645 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8646 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8647 struct sctp_data_chunk *dchkh;
8649 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8650 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8652 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8653 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8654 /* ok we will add this one */
8657 * Add an AUTH chunk, if chunk
8658 * requires it, save the offset into
8659 * the chain for AUTH
8661 if (data_auth_reqd) {
8663 outchain = sctp_add_auth_chunk(outchain,
8669 auth_keyid = chk->auth_keyid;
8671 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8672 } else if (override_ok) {
8677 auth_keyid = chk->auth_keyid;
8679 } else if (auth_keyid != chk->auth_keyid) {
8687 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8688 chk->send_size, chk->copy_by_ref);
8689 if (outchain == NULL) {
8690 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8691 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8692 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8695 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8698 /* upate our MTU size */
8699 /* Do clear IP_DF ? */
8700 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8703 /* unsigned subtraction of mtu */
8704 if (mtu > chk->send_size)
8705 mtu -= chk->send_size;
8708 /* unsigned subtraction of r_mtu */
8709 if (r_mtu > chk->send_size)
8710 r_mtu -= chk->send_size;
8714 to_out += chk->send_size;
8715 if ((to_out > mx_mtu) && no_fragmentflg) {
8717 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8719 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8723 chk->window_probe = 0;
8724 data_list[bundle_at++] = chk;
8725 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8728 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8729 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8730 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8732 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8734 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8735 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8745 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8747 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8748 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8749 data_list[0]->window_probe = 1;
8750 net->window_probe = 1;
8756 * Must be sent in order of the
8757 * TSN's (on a network)
8761 } /* for (chunk gather loop for this net) */
8762 } /* if asoc.state OPEN */
8764 /* Is there something to send for this destination? */
8766 /* We may need to start a control timer or two */
8768 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8771 * do NOT clear the asconf flag as it is
8772 * used to do appropriate source address
8777 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8780 /* must start a send timer if data is being sent */
8781 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8783 * no timer running on this destination
8786 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8788 if (bundle_at || hbflag) {
8789 /* For data/asconf and hb set time */
8790 if (*now_filled == 0) {
8791 (void)SCTP_GETTIME_TIMEVAL(now);
8794 net->last_sent_time = *now;
8796 /* Now send it, if there is anything to send :> */
8797 if ((error = sctp_lowlevel_chunk_output(inp,
8800 (struct sockaddr *)&net->ro._l_addr,
8808 inp->sctp_lport, stcb->rport,
8809 htonl(stcb->asoc.peer_vtag),
8813 /* error, we could not output */
8814 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8815 if (from_where == 0) {
8816 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8818 if (error == ENOBUFS) {
8819 asoc->ifp_had_enobuf = 1;
8820 SCTP_STAT_INCR(sctps_lowlevelerr);
8822 if (error == EHOSTUNREACH) {
8824 * Destination went unreachable
8827 sctp_move_chunks_from_net(stcb, net);
8831 * I add this line to be paranoid. As far as
8832 * I can tell the continue, takes us back to
8833 * the top of the for, but just to make sure
8834 * I will reset these again here.
8836 ctl_cnt = bundle_at = 0;
8837 continue; /* This takes us back to the
8838 * for() for the nets. */
8840 asoc->ifp_had_enobuf = 0;
8846 *num_out += (ctl_cnt + bundle_at);
8849 /* setup for a RTO measurement */
8850 tsns_sent = data_list[0]->rec.data.tsn;
8851 /* fill time if not already filled */
8852 if (*now_filled == 0) {
8853 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8855 *now = asoc->time_last_sent;
8857 asoc->time_last_sent = *now;
8859 if (net->rto_needed) {
8860 data_list[0]->do_rtt = 1;
8861 net->rto_needed = 0;
8863 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8864 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8871 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8874 if (old_start_at == NULL) {
8875 old_start_at = start_at;
8876 start_at = TAILQ_FIRST(&asoc->nets);
8878 goto again_one_more_time;
8881 * At the end there should be no NON timed chunks hanging on this
8884 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8885 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8887 if ((*num_out == 0) && (*reason_code == 0)) {
8892 sctp_clean_up_ctl(stcb, asoc, so_locked);
8897 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8900 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8901 * the control chunk queue.
8903 struct sctp_chunkhdr *hdr;
8904 struct sctp_tmit_chunk *chk;
8905 struct mbuf *mat, *last_mbuf;
8906 uint32_t chunk_length;
8907 uint16_t padding_length;
8909 SCTP_TCB_LOCK_ASSERT(stcb);
8910 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8911 if (op_err == NULL) {
8916 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8917 chunk_length += SCTP_BUF_LEN(mat);
8918 if (SCTP_BUF_NEXT(mat) == NULL) {
8922 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8923 sctp_m_freem(op_err);
8926 padding_length = chunk_length % 4;
8927 if (padding_length != 0) {
8928 padding_length = 4 - padding_length;
8930 if (padding_length != 0) {
8931 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8932 sctp_m_freem(op_err);
8936 sctp_alloc_a_chunk(stcb, chk);
8939 sctp_m_freem(op_err);
8942 chk->copy_by_ref = 0;
8943 chk->send_size = (uint16_t)chunk_length;
8944 chk->sent = SCTP_DATAGRAM_UNSENT;
8946 chk->asoc = &stcb->asoc;
8949 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8950 chk->rec.chunk_id.can_take_data = 0;
8951 hdr = mtod(op_err, struct sctp_chunkhdr *);
8952 hdr->chunk_type = SCTP_OPERATION_ERROR;
8953 hdr->chunk_flags = 0;
8954 hdr->chunk_length = htons(chk->send_size);
8955 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8956 chk->asoc->ctrl_queue_cnt++;
8960 sctp_send_cookie_echo(struct mbuf *m,
8962 struct sctp_tcb *stcb,
8963 struct sctp_nets *net)
8966 * pull out the cookie and put it at the front of the control chunk
8970 struct mbuf *cookie;
8971 struct sctp_paramhdr param, *phdr;
8972 struct sctp_chunkhdr *hdr;
8973 struct sctp_tmit_chunk *chk;
8974 uint16_t ptype, plen;
8976 SCTP_TCB_LOCK_ASSERT(stcb);
8977 /* First find the cookie in the param area */
8979 at = offset + sizeof(struct sctp_init_chunk);
8981 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8985 ptype = ntohs(phdr->param_type);
8986 plen = ntohs(phdr->param_length);
8987 if (ptype == SCTP_STATE_COOKIE) {
8990 /* found the cookie */
8991 if ((pad = (plen % 4))) {
8994 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8995 if (cookie == NULL) {
8999 #ifdef SCTP_MBUF_LOGGING
9000 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9001 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9006 at += SCTP_SIZE32(plen);
9008 /* ok, we got the cookie lets change it into a cookie echo chunk */
9009 /* first the change from param to cookie */
9010 hdr = mtod(cookie, struct sctp_chunkhdr *);
9011 hdr->chunk_type = SCTP_COOKIE_ECHO;
9012 hdr->chunk_flags = 0;
9013 /* get the chunk stuff now and place it in the FRONT of the queue */
9014 sctp_alloc_a_chunk(stcb, chk);
9017 sctp_m_freem(cookie);
9020 chk->copy_by_ref = 0;
9021 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9022 chk->rec.chunk_id.can_take_data = 0;
9023 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9024 chk->send_size = plen;
9025 chk->sent = SCTP_DATAGRAM_UNSENT;
9027 chk->asoc = &stcb->asoc;
9030 atomic_add_int(&chk->whoTo->ref_count, 1);
9031 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9032 chk->asoc->ctrl_queue_cnt++;
9037 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9041 struct sctp_nets *net)
9044 * take a HB request and make it into a HB ack and send it.
9046 struct mbuf *outchain;
9047 struct sctp_chunkhdr *chdr;
9048 struct sctp_tmit_chunk *chk;
9052 /* must have a net pointer */
9055 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9056 if (outchain == NULL) {
9057 /* gak out of memory */
9060 #ifdef SCTP_MBUF_LOGGING
9061 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9062 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9065 chdr = mtod(outchain, struct sctp_chunkhdr *);
9066 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9067 chdr->chunk_flags = 0;
9068 if (chk_length % 4) {
9070 uint32_t cpthis = 0;
9073 padlen = 4 - (chk_length % 4);
9074 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9076 sctp_alloc_a_chunk(stcb, chk);
9079 sctp_m_freem(outchain);
9082 chk->copy_by_ref = 0;
9083 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9084 chk->rec.chunk_id.can_take_data = 1;
9086 chk->send_size = chk_length;
9087 chk->sent = SCTP_DATAGRAM_UNSENT;
9089 chk->asoc = &stcb->asoc;
9090 chk->data = outchain;
9092 atomic_add_int(&chk->whoTo->ref_count, 1);
9093 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9094 chk->asoc->ctrl_queue_cnt++;
9098 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9100 /* formulate and queue a cookie-ack back to sender */
9101 struct mbuf *cookie_ack;
9102 struct sctp_chunkhdr *hdr;
9103 struct sctp_tmit_chunk *chk;
9105 SCTP_TCB_LOCK_ASSERT(stcb);
9107 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9108 if (cookie_ack == NULL) {
9112 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9113 sctp_alloc_a_chunk(stcb, chk);
9116 sctp_m_freem(cookie_ack);
9119 chk->copy_by_ref = 0;
9120 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9121 chk->rec.chunk_id.can_take_data = 1;
9123 chk->send_size = sizeof(struct sctp_chunkhdr);
9124 chk->sent = SCTP_DATAGRAM_UNSENT;
9126 chk->asoc = &stcb->asoc;
9127 chk->data = cookie_ack;
9128 if (chk->asoc->last_control_chunk_from != NULL) {
9129 chk->whoTo = chk->asoc->last_control_chunk_from;
9130 atomic_add_int(&chk->whoTo->ref_count, 1);
9134 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9135 hdr->chunk_type = SCTP_COOKIE_ACK;
9136 hdr->chunk_flags = 0;
9137 hdr->chunk_length = htons(chk->send_size);
9138 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9139 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9140 chk->asoc->ctrl_queue_cnt++;
9146 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9148 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9149 struct mbuf *m_shutdown_ack;
9150 struct sctp_shutdown_ack_chunk *ack_cp;
9151 struct sctp_tmit_chunk *chk;
9153 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9154 if (m_shutdown_ack == NULL) {
9158 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9159 sctp_alloc_a_chunk(stcb, chk);
9162 sctp_m_freem(m_shutdown_ack);
9165 chk->copy_by_ref = 0;
9166 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9167 chk->rec.chunk_id.can_take_data = 1;
9169 chk->send_size = sizeof(struct sctp_chunkhdr);
9170 chk->sent = SCTP_DATAGRAM_UNSENT;
9173 chk->asoc = &stcb->asoc;
9174 chk->data = m_shutdown_ack;
9177 atomic_add_int(&chk->whoTo->ref_count, 1);
9179 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9180 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9181 ack_cp->ch.chunk_flags = 0;
9182 ack_cp->ch.chunk_length = htons(chk->send_size);
9183 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9184 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9185 chk->asoc->ctrl_queue_cnt++;
9190 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9192 /* formulate and queue a SHUTDOWN to the sender */
9193 struct mbuf *m_shutdown;
9194 struct sctp_shutdown_chunk *shutdown_cp;
9195 struct sctp_tmit_chunk *chk;
9197 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9198 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9199 /* We already have a SHUTDOWN queued. Reuse it. */
9201 sctp_free_remote_addr(chk->whoTo);
9208 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9209 if (m_shutdown == NULL) {
9213 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9214 sctp_alloc_a_chunk(stcb, chk);
9217 sctp_m_freem(m_shutdown);
9220 chk->copy_by_ref = 0;
9221 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9222 chk->rec.chunk_id.can_take_data = 1;
9224 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9225 chk->sent = SCTP_DATAGRAM_UNSENT;
9228 chk->asoc = &stcb->asoc;
9229 chk->data = m_shutdown;
9232 atomic_add_int(&chk->whoTo->ref_count, 1);
9234 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9235 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9236 shutdown_cp->ch.chunk_flags = 0;
9237 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9238 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9239 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9240 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9241 chk->asoc->ctrl_queue_cnt++;
9243 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9246 atomic_add_int(&chk->whoTo->ref_count, 1);
9248 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9249 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9250 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9256 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9259 * formulate and queue an ASCONF to the peer. ASCONF parameters
9260 * should be queued on the assoc queue.
9262 struct sctp_tmit_chunk *chk;
9263 struct mbuf *m_asconf;
9266 SCTP_TCB_LOCK_ASSERT(stcb);
9268 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9269 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9270 /* can't send a new one if there is one in flight already */
9273 /* compose an ASCONF chunk, maximum length is PMTU */
9274 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9275 if (m_asconf == NULL) {
9278 sctp_alloc_a_chunk(stcb, chk);
9281 sctp_m_freem(m_asconf);
9284 chk->copy_by_ref = 0;
9285 chk->rec.chunk_id.id = SCTP_ASCONF;
9286 chk->rec.chunk_id.can_take_data = 0;
9287 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9288 chk->data = m_asconf;
9289 chk->send_size = len;
9290 chk->sent = SCTP_DATAGRAM_UNSENT;
9292 chk->asoc = &stcb->asoc;
9295 atomic_add_int(&chk->whoTo->ref_count, 1);
9297 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9298 chk->asoc->ctrl_queue_cnt++;
9303 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9306 * formulate and queue a asconf-ack back to sender. the asconf-ack
9307 * must be stored in the tcb.
9309 struct sctp_tmit_chunk *chk;
9310 struct sctp_asconf_ack *ack, *latest_ack;
9312 struct sctp_nets *net = NULL;
9314 SCTP_TCB_LOCK_ASSERT(stcb);
9315 /* Get the latest ASCONF-ACK */
9316 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9317 if (latest_ack == NULL) {
9320 if (latest_ack->last_sent_to != NULL &&
9321 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9322 /* we're doing a retransmission */
9323 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9326 if (stcb->asoc.last_control_chunk_from == NULL) {
9327 if (stcb->asoc.alternate) {
9328 net = stcb->asoc.alternate;
9330 net = stcb->asoc.primary_destination;
9333 net = stcb->asoc.last_control_chunk_from;
9338 if (stcb->asoc.last_control_chunk_from == NULL) {
9339 if (stcb->asoc.alternate) {
9340 net = stcb->asoc.alternate;
9342 net = stcb->asoc.primary_destination;
9345 net = stcb->asoc.last_control_chunk_from;
9348 latest_ack->last_sent_to = net;
9350 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9351 if (ack->data == NULL) {
9354 /* copy the asconf_ack */
9355 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9356 if (m_ack == NULL) {
9357 /* couldn't copy it */
9360 #ifdef SCTP_MBUF_LOGGING
9361 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9362 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9366 sctp_alloc_a_chunk(stcb, chk);
9370 sctp_m_freem(m_ack);
9373 chk->copy_by_ref = 0;
9374 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9375 chk->rec.chunk_id.can_take_data = 1;
9376 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9379 atomic_add_int(&chk->whoTo->ref_count, 1);
9382 chk->send_size = ack->len;
9383 chk->sent = SCTP_DATAGRAM_UNSENT;
9385 chk->asoc = &stcb->asoc;
9387 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9388 chk->asoc->ctrl_queue_cnt++;
9395 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9396 struct sctp_tcb *stcb,
9397 struct sctp_association *asoc,
9398 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9399 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9405 * send out one MTU of retransmission. If fast_retransmit is
9406 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9407 * rwnd. For a Cookie or Asconf in the control chunk queue we
9408 * retransmit them by themselves.
9410 * For data chunks we will pick out the lowest TSN's in the sent_queue
9411 * marked for resend and bundle them all together (up to a MTU of
9412 * destination). The address to send to should have been
9413 * selected/changed where the retransmission was marked (i.e. in FR
9414 * or t3-timeout routines).
9416 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9417 struct sctp_tmit_chunk *chk, *fwd;
9418 struct mbuf *m, *endofchain;
9419 struct sctp_nets *net = NULL;
9420 uint32_t tsns_sent = 0;
9421 int no_fragmentflg, bundle_at, cnt_thru;
9423 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9424 struct sctp_auth_chunk *auth = NULL;
9425 uint32_t auth_offset = 0;
9426 uint16_t auth_keyid;
9427 int override_ok = 1;
9428 int data_auth_reqd = 0;
9431 SCTP_TCB_LOCK_ASSERT(stcb);
9432 tmr_started = ctl_cnt = bundle_at = error = 0;
9437 endofchain = m = NULL;
9438 auth_keyid = stcb->asoc.authinfo.active_keyid;
9439 #ifdef SCTP_AUDITING_ENABLED
9440 sctp_audit_log(0xC3, 1);
9442 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9443 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9444 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9445 asoc->sent_queue_retran_cnt);
9446 asoc->sent_queue_cnt = 0;
9447 asoc->sent_queue_cnt_removeable = 0;
9448 /* send back 0/0 so we enter normal transmission */
9452 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9453 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9454 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9455 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9456 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9459 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9460 if (chk != asoc->str_reset) {
9462 * not eligible for retran if its
9469 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9473 * Add an AUTH chunk, if chunk requires it save the
9474 * offset into the chain for AUTH
9476 if ((auth == NULL) &&
9477 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9478 stcb->asoc.peer_auth_chunks))) {
9479 m = sctp_add_auth_chunk(m, &endofchain,
9480 &auth, &auth_offset,
9482 chk->rec.chunk_id.id);
9483 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9485 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9491 /* do we have control chunks to retransmit? */
9493 /* Start a timer no matter if we succeed or fail */
9494 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9495 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9496 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9497 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9498 chk->snd_count++; /* update our count */
9499 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9500 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9501 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9502 no_fragmentflg, 0, 0,
9503 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9504 chk->whoTo->port, NULL,
9507 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9508 if (error == ENOBUFS) {
9509 asoc->ifp_had_enobuf = 1;
9510 SCTP_STAT_INCR(sctps_lowlevelerr);
9514 asoc->ifp_had_enobuf = 0;
9520 * We don't want to mark the net->sent time here since this
9521 * we use this for HB and retrans cannot measure RTT
9523 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9525 chk->sent = SCTP_DATAGRAM_SENT;
9526 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9530 /* Clean up the fwd-tsn list */
9531 sctp_clean_up_ctl(stcb, asoc, so_locked);
9536 * Ok, it is just data retransmission we need to do or that and a
9537 * fwd-tsn with it all.
9539 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9540 return (SCTP_RETRAN_DONE);
9542 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9543 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9544 /* not yet open, resend the cookie and that is it */
9547 #ifdef SCTP_AUDITING_ENABLED
9548 sctp_auditing(20, inp, stcb, NULL);
9550 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9551 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9552 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9553 /* No, not sent to this net or not ready for rtx */
9556 if (chk->data == NULL) {
9557 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9558 chk->rec.data.tsn, chk->snd_count, chk->sent);
9561 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9562 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9563 struct mbuf *op_err;
9564 char msg[SCTP_DIAG_INFO_LEN];
9566 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9567 chk->rec.data.tsn, chk->snd_count);
9568 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9570 atomic_add_int(&stcb->asoc.refcnt, 1);
9571 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9573 SCTP_TCB_LOCK(stcb);
9574 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9575 return (SCTP_RETRAN_EXIT);
9577 /* pick up the net */
9579 switch (net->ro._l_addr.sa.sa_family) {
9582 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9587 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9596 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9597 /* No room in peers rwnd */
9600 tsn = asoc->last_acked_seq + 1;
9601 if (tsn == chk->rec.data.tsn) {
9603 * we make a special exception for this
9604 * case. The peer has no rwnd but is missing
9605 * the lowest chunk.. which is probably what
9606 * is holding up the rwnd.
9608 goto one_chunk_around;
9613 if (asoc->peers_rwnd < mtu) {
9615 if ((asoc->peers_rwnd == 0) &&
9616 (asoc->total_flight == 0)) {
9617 chk->window_probe = 1;
9618 chk->whoTo->window_probe = 1;
9621 #ifdef SCTP_AUDITING_ENABLED
9622 sctp_audit_log(0xC3, 2);
9626 net->fast_retran_ip = 0;
9627 if (chk->rec.data.doing_fast_retransmit == 0) {
9629 * if no FR in progress skip destination that have
9630 * flight_size > cwnd.
9632 if (net->flight_size >= net->cwnd) {
9637 * Mark the destination net to have FR recovery
9641 net->fast_retran_ip = 1;
9645 * if no AUTH is yet included and this chunk requires it,
9646 * make sure to account for it. We don't apply the size
9647 * until the AUTH chunk is actually added below in case
9648 * there is no room for this chunk.
9650 if (data_auth_reqd && (auth == NULL)) {
9651 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9655 if ((chk->send_size <= (mtu - dmtu)) ||
9656 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9657 /* ok we will add this one */
9658 if (data_auth_reqd) {
9660 m = sctp_add_auth_chunk(m,
9666 auth_keyid = chk->auth_keyid;
9668 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9669 } else if (override_ok) {
9670 auth_keyid = chk->auth_keyid;
9672 } else if (chk->auth_keyid != auth_keyid) {
9673 /* different keyid, so done bundling */
9677 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9679 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9682 /* Do clear IP_DF ? */
9683 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9686 /* upate our MTU size */
9687 if (mtu > (chk->send_size + dmtu))
9688 mtu -= (chk->send_size + dmtu);
9691 data_list[bundle_at++] = chk;
9692 if (one_chunk && (asoc->total_flight <= 0)) {
9693 SCTP_STAT_INCR(sctps_windowprobed);
9696 if (one_chunk == 0) {
9698 * now are there anymore forward from chk to pick
9701 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9702 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9703 /* Nope, not for retran */
9706 if (fwd->whoTo != net) {
9707 /* Nope, not the net in question */
9710 if (data_auth_reqd && (auth == NULL)) {
9711 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9714 if (fwd->send_size <= (mtu - dmtu)) {
9715 if (data_auth_reqd) {
9717 m = sctp_add_auth_chunk(m,
9723 auth_keyid = fwd->auth_keyid;
9725 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9726 } else if (override_ok) {
9727 auth_keyid = fwd->auth_keyid;
9729 } else if (fwd->auth_keyid != auth_keyid) {
9737 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9739 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9742 /* Do clear IP_DF ? */
9743 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9746 /* upate our MTU size */
9747 if (mtu > (fwd->send_size + dmtu))
9748 mtu -= (fwd->send_size + dmtu);
9751 data_list[bundle_at++] = fwd;
9752 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9756 /* can't fit so we are done */
9761 /* Is there something to send for this destination? */
9764 * No matter if we fail/or succeed we should start a
9765 * timer. A failure is like a lost IP packet :-)
9767 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9769 * no timer running on this destination
9772 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9775 /* Now lets send it, if there is anything to send :> */
9776 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9777 (struct sockaddr *)&net->ro._l_addr, m,
9778 auth_offset, auth, auth_keyid,
9779 no_fragmentflg, 0, 0,
9780 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9784 /* error, we could not output */
9785 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9786 if (error == ENOBUFS) {
9787 asoc->ifp_had_enobuf = 1;
9788 SCTP_STAT_INCR(sctps_lowlevelerr);
9792 asoc->ifp_had_enobuf = 0;
9799 * We don't want to mark the net->sent time here
9800 * since this we use this for HB and retrans cannot
9803 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9805 /* For auto-close */
9807 if (*now_filled == 0) {
9808 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9809 *now = asoc->time_last_sent;
9812 asoc->time_last_sent = *now;
9814 *cnt_out += bundle_at;
9815 #ifdef SCTP_AUDITING_ENABLED
9816 sctp_audit_log(0xC4, bundle_at);
9819 tsns_sent = data_list[0]->rec.data.tsn;
9821 for (i = 0; i < bundle_at; i++) {
9822 SCTP_STAT_INCR(sctps_sendretransdata);
9823 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9825 * When we have a revoked data, and we
9826 * retransmit it, then we clear the revoked
9827 * flag since this flag dictates if we
9828 * subtracted from the fs
9830 if (data_list[i]->rec.data.chunk_was_revoked) {
9831 /* Deflate the cwnd */
9832 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9833 data_list[i]->rec.data.chunk_was_revoked = 0;
9835 data_list[i]->snd_count++;
9836 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9837 /* record the time */
9838 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9839 if (data_list[i]->book_size_scale) {
9841 * need to double the book size on
9844 data_list[i]->book_size_scale = 0;
9846 * Since we double the booksize, we
9847 * must also double the output queue
9848 * size, since this get shrunk when
9849 * we free by this amount.
9851 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9852 data_list[i]->book_size *= 2;
9856 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9857 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9858 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9860 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9861 (uint32_t)(data_list[i]->send_size +
9862 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9864 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9865 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9866 data_list[i]->whoTo->flight_size,
9867 data_list[i]->book_size,
9868 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9869 data_list[i]->rec.data.tsn);
9871 sctp_flight_size_increase(data_list[i]);
9872 sctp_total_flight_increase(stcb, data_list[i]);
9873 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9874 /* SWS sender side engages */
9875 asoc->peers_rwnd = 0;
9878 (data_list[i]->rec.data.doing_fast_retransmit)) {
9879 SCTP_STAT_INCR(sctps_sendfastretrans);
9880 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9881 (tmr_started == 0)) {
9883 * ok we just fast-retrans'd
9884 * the lowest TSN, i.e the
9885 * first on the list. In
9886 * this case we want to give
9887 * some more time to get a
9888 * SACK back without a
9891 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9892 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9893 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9897 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9898 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9900 #ifdef SCTP_AUDITING_ENABLED
9901 sctp_auditing(21, inp, stcb, NULL);
9907 if (asoc->sent_queue_retran_cnt <= 0) {
9908 /* all done we have no more to retran */
9909 asoc->sent_queue_retran_cnt = 0;
9913 /* No more room in rwnd */
9916 /* stop the for loop here. we sent out a packet */
9923 sctp_timer_validation(struct sctp_inpcb *inp,
9924 struct sctp_tcb *stcb,
9925 struct sctp_association *asoc)
9927 struct sctp_nets *net;
9929 /* Validate that a timer is running somewhere */
9930 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9931 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9932 /* Here is a timer */
9936 SCTP_TCB_LOCK_ASSERT(stcb);
9937 /* Gak, we did not have a timer somewhere */
9938 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9939 if (asoc->alternate) {
9940 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9942 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9948 sctp_chunk_output(struct sctp_inpcb *inp,
9949 struct sctp_tcb *stcb,
9952 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9958 * Ok this is the generic chunk service queue. we must do the
9960 * - See if there are retransmits pending, if so we must
9962 * - Service the stream queue that is next, moving any
9963 * message (note I must get a complete message i.e.
9964 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9966 * - Check to see if the cwnd/rwnd allows any output, if so we
9967 * go ahead and fomulate and send the low level chunks. Making sure
9968 * to combine any control in the control chunk queue also.
9970 struct sctp_association *asoc;
9971 struct sctp_nets *net;
9972 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9973 unsigned int burst_cnt = 0;
9977 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9980 unsigned int tot_frs = 0;
9984 /* The Nagle algorithm is only applied when handling a send call. */
9985 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9986 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9994 SCTP_TCB_LOCK_ASSERT(stcb);
9996 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9998 if ((un_sent <= 0) &&
9999 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10000 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10001 (asoc->sent_queue_retran_cnt == 0) &&
10002 (asoc->trigger_reset == 0)) {
10003 /* Nothing to do unless there is something to be sent left */
10007 * Do we have something to send, data or control AND a sack timer
10008 * running, if so piggy-back the sack.
10010 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10011 sctp_send_sack(stcb, so_locked);
10012 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10014 while (asoc->sent_queue_retran_cnt) {
10016 * Ok, it is retransmission time only, we send out only ONE
10017 * packet with a single call off to the retran code.
10019 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10021 * Special hook for handling cookiess discarded
10022 * by peer that carried data. Send cookie-ack only
10023 * and then the next call with get the retran's.
10025 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10027 &now, &now_filled, frag_point, so_locked);
10029 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10030 /* if its not from a HB then do it */
10032 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10038 * its from any other place, we don't allow retran
10039 * output (only control)
10044 /* Can't send anymore */
10046 * now lets push out control by calling med-level
10047 * output once. this assures that we WILL send HB's
10050 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10052 &now, &now_filled, frag_point, so_locked);
10053 #ifdef SCTP_AUDITING_ENABLED
10054 sctp_auditing(8, inp, stcb, NULL);
10056 sctp_timer_validation(inp, stcb, asoc);
10061 * The count was off.. retran is not happening so do
10062 * the normal retransmission.
10064 #ifdef SCTP_AUDITING_ENABLED
10065 sctp_auditing(9, inp, stcb, NULL);
10067 if (ret == SCTP_RETRAN_EXIT) {
10072 if (from_where == SCTP_OUTPUT_FROM_T3) {
10073 /* Only one transmission allowed out of a timeout */
10074 #ifdef SCTP_AUDITING_ENABLED
10075 sctp_auditing(10, inp, stcb, NULL);
10077 /* Push out any control */
10078 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10079 &now, &now_filled, frag_point, so_locked);
10082 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10083 /* Hit FR burst limit */
10086 if ((num_out == 0) && (ret == 0)) {
10087 /* No more retrans to send */
10091 #ifdef SCTP_AUDITING_ENABLED
10092 sctp_auditing(12, inp, stcb, NULL);
10094 /* Check for bad destinations, if they exist move chunks around. */
10095 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10096 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10098 * if possible move things off of this address we
10099 * still may send below due to the dormant state but
10100 * we try to find an alternate address to send to
10101 * and if we have one we move all queued data on the
10102 * out wheel to this alternate address.
10104 if (net->ref_count > 1)
10105 sctp_move_chunks_from_net(stcb, net);
10108 * if ((asoc->sat_network) || (net->addr_is_local))
10109 * { burst_limit = asoc->max_burst *
10110 * SCTP_SAT_NETWORK_BURST_INCR; }
10112 if (asoc->max_burst > 0) {
10113 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10114 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10116 * JRS - Use the congestion
10117 * control given in the
10118 * congestion control module
10120 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10121 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10122 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10124 SCTP_STAT_INCR(sctps_maxburstqueued);
10126 net->fast_retran_ip = 0;
10128 if (net->flight_size == 0) {
10130 * Should be decaying the
10142 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10143 &reason_code, 0, from_where,
10144 &now, &now_filled, frag_point, so_locked);
10146 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10147 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10148 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10150 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10151 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10152 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10156 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10158 tot_out += num_out;
10160 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10161 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10162 if (num_out == 0) {
10163 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10168 * When the Nagle algorithm is used, look at how
10169 * much is unsent, then if its smaller than an MTU
10170 * and we have data in flight we stop, except if we
10171 * are handling a fragmented user message.
10173 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10174 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10175 (stcb->asoc.total_flight > 0)) {
10176 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10180 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10181 TAILQ_EMPTY(&asoc->send_queue) &&
10182 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10183 /* Nothing left to send */
10186 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10187 /* Nothing left to send */
10190 } while (num_out &&
10191 ((asoc->max_burst == 0) ||
10192 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10193 (burst_cnt < asoc->max_burst)));
10195 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10196 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10197 SCTP_STAT_INCR(sctps_maxburstqueued);
10198 asoc->burst_limit_applied = 1;
10199 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10200 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10203 asoc->burst_limit_applied = 0;
10206 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10207 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10209 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10213 * Now we need to clean up the control chunk chain if a ECNE is on
10214 * it. It must be marked as UNSENT again so next call will continue
10215 * to send it until such time that we get a CWR, to remove it.
10217 if (stcb->asoc.ecn_echo_cnt_onq)
10218 sctp_fix_ecn_echo(asoc);
10220 if (stcb->asoc.trigger_reset) {
10221 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10231 struct sctp_inpcb *inp,
10233 struct sockaddr *addr,
10234 struct mbuf *control,
10239 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10242 if (inp->sctp_socket == NULL) {
10243 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10246 return (sctp_sosend(inp->sctp_socket,
10248 (struct uio *)NULL,
10256 send_forward_tsn(struct sctp_tcb *stcb,
10257 struct sctp_association *asoc)
10259 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10260 struct sctp_forward_tsn_chunk *fwdtsn;
10261 struct sctp_strseq *strseq;
10262 struct sctp_strseq_mid *strseq_m;
10263 uint32_t advance_peer_ack_point;
10264 unsigned int cnt_of_space, i, ovh;
10265 unsigned int space_needed;
10266 unsigned int cnt_of_skipped = 0;
10268 SCTP_TCB_LOCK_ASSERT(stcb);
10269 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10270 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10271 /* mark it to unsent */
10272 chk->sent = SCTP_DATAGRAM_UNSENT;
10273 chk->snd_count = 0;
10274 /* Do we correct its output location? */
10276 sctp_free_remote_addr(chk->whoTo);
10279 goto sctp_fill_in_rest;
10282 /* Ok if we reach here we must build one */
10283 sctp_alloc_a_chunk(stcb, chk);
10287 asoc->fwd_tsn_cnt++;
10288 chk->copy_by_ref = 0;
10290 * We don't do the old thing here since this is used not for on-wire
10291 * but to tell if we are sending a fwd-tsn by the stack during
10292 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10294 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10295 chk->rec.chunk_id.can_take_data = 0;
10299 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10300 if (chk->data == NULL) {
10301 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10304 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10305 chk->sent = SCTP_DATAGRAM_UNSENT;
10306 chk->snd_count = 0;
10307 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10308 asoc->ctrl_queue_cnt++;
10311 * Here we go through and fill out the part that deals with
10312 * stream/seq of the ones we skip.
10314 SCTP_BUF_LEN(chk->data) = 0;
10315 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10316 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10317 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10318 /* no more to look at */
10321 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10322 /* We don't report these */
10327 if (asoc->idata_supported) {
10328 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10329 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10331 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10332 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10334 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10336 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10337 ovh = SCTP_MIN_OVERHEAD;
10339 ovh = SCTP_MIN_V4_OVERHEAD;
10341 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10342 /* trim to a mtu size */
10343 cnt_of_space = asoc->smallest_mtu - ovh;
10345 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10346 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10347 0xff, 0, cnt_of_skipped,
10348 asoc->advanced_peer_ack_point);
10350 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10351 if (cnt_of_space < space_needed) {
10353 * ok we must trim down the chunk by lowering the
10354 * advance peer ack point.
10356 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10357 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10358 0xff, 0xff, cnt_of_space,
10361 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10362 if (asoc->idata_supported) {
10363 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10365 cnt_of_skipped /= sizeof(struct sctp_strseq);
10368 * Go through and find the TSN that will be the one
10371 at = TAILQ_FIRST(&asoc->sent_queue);
10373 for (i = 0; i < cnt_of_skipped; i++) {
10374 tp1 = TAILQ_NEXT(at, sctp_next);
10381 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10382 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10383 0xff, cnt_of_skipped, at->rec.data.tsn,
10384 asoc->advanced_peer_ack_point);
10388 * last now points to last one I can report, update
10392 advance_peer_ack_point = last->rec.data.tsn;
10394 if (asoc->idata_supported) {
10395 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10396 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10398 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10399 cnt_of_skipped * sizeof(struct sctp_strseq);
10402 chk->send_size = space_needed;
10403 /* Setup the chunk */
10404 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10405 fwdtsn->ch.chunk_length = htons(chk->send_size);
10406 fwdtsn->ch.chunk_flags = 0;
10407 if (asoc->idata_supported) {
10408 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10410 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10412 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10413 SCTP_BUF_LEN(chk->data) = chk->send_size;
10416 * Move pointer to after the fwdtsn and transfer to the
10419 if (asoc->idata_supported) {
10420 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10423 strseq = (struct sctp_strseq *)fwdtsn;
10427 * Now populate the strseq list. This is done blindly
10428 * without pulling out duplicate stream info. This is
10429 * inefficent but won't harm the process since the peer will
10430 * look at these in sequence and will thus release anything.
10431 * It could mean we exceed the PMTU and chop off some that
10432 * we could have included.. but this is unlikely (aka 1432/4
10433 * would mean 300+ stream seq's would have to be reported in
10434 * one FWD-TSN. With a bit of work we can later FIX this to
10435 * optimize and pull out duplicates.. but it does add more
10436 * overhead. So for now... not!
10439 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10440 if (i >= cnt_of_skipped) {
10443 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10444 /* We don't report these */
10447 if (at->rec.data.tsn == advance_peer_ack_point) {
10448 at->rec.data.fwd_tsn_cnt = 0;
10450 if (asoc->idata_supported) {
10451 strseq_m->sid = htons(at->rec.data.sid);
10452 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10453 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10455 strseq_m->flags = 0;
10457 strseq_m->mid = htonl(at->rec.data.mid);
10460 strseq->sid = htons(at->rec.data.sid);
10461 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10470 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10471 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10477 * Queue up a SACK or NR-SACK in the control queue.
10478 * We must first check to see if a SACK or NR-SACK is
10479 * somehow on the control queue.
10480 * If so, we will take and and remove the old one.
10482 struct sctp_association *asoc;
10483 struct sctp_tmit_chunk *chk, *a_chk;
10484 struct sctp_sack_chunk *sack;
10485 struct sctp_nr_sack_chunk *nr_sack;
10486 struct sctp_gap_ack_block *gap_descriptor;
10487 const struct sack_track *selector;
10492 int limit_reached = 0;
10493 unsigned int i, siz, j;
10494 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10497 uint32_t highest_tsn;
10502 if (stcb->asoc.nrsack_supported == 1) {
10503 type = SCTP_NR_SELECTIVE_ACK;
10505 type = SCTP_SELECTIVE_ACK;
10508 asoc = &stcb->asoc;
10509 SCTP_TCB_LOCK_ASSERT(stcb);
10510 if (asoc->last_data_chunk_from == NULL) {
10511 /* Hmm we never received anything */
10514 sctp_slide_mapping_arrays(stcb);
10515 sctp_set_rwnd(stcb, asoc);
10516 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10517 if (chk->rec.chunk_id.id == type) {
10518 /* Hmm, found a sack already on queue, remove it */
10519 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10520 asoc->ctrl_queue_cnt--;
10523 sctp_m_freem(a_chk->data);
10524 a_chk->data = NULL;
10526 if (a_chk->whoTo) {
10527 sctp_free_remote_addr(a_chk->whoTo);
10528 a_chk->whoTo = NULL;
10533 if (a_chk == NULL) {
10534 sctp_alloc_a_chunk(stcb, a_chk);
10535 if (a_chk == NULL) {
10536 /* No memory so we drop the idea, and set a timer */
10537 if (stcb->asoc.delayed_ack) {
10538 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10539 stcb->sctp_ep, stcb, NULL,
10540 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10541 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10542 stcb->sctp_ep, stcb, NULL);
10544 stcb->asoc.send_sack = 1;
10548 a_chk->copy_by_ref = 0;
10549 a_chk->rec.chunk_id.id = type;
10550 a_chk->rec.chunk_id.can_take_data = 1;
10552 /* Clear our pkt counts */
10553 asoc->data_pkts_seen = 0;
10556 a_chk->asoc = asoc;
10557 a_chk->snd_count = 0;
10558 a_chk->send_size = 0; /* fill in later */
10559 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10560 a_chk->whoTo = NULL;
10562 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10564 * Ok, the destination for the SACK is unreachable, lets see if
10565 * we can select an alternate to asoc->last_data_chunk_from
10567 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10568 if (a_chk->whoTo == NULL) {
10569 /* Nope, no alternate */
10570 a_chk->whoTo = asoc->last_data_chunk_from;
10573 a_chk->whoTo = asoc->last_data_chunk_from;
10575 if (a_chk->whoTo) {
10576 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10578 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10579 highest_tsn = asoc->highest_tsn_inside_map;
10581 highest_tsn = asoc->highest_tsn_inside_nr_map;
10583 if (highest_tsn == asoc->cumulative_tsn) {
10585 if (type == SCTP_SELECTIVE_ACK) {
10586 space_req = sizeof(struct sctp_sack_chunk);
10588 space_req = sizeof(struct sctp_nr_sack_chunk);
10591 /* gaps get a cluster */
10592 space_req = MCLBYTES;
10594 /* Ok now lets formulate a MBUF with our sack */
10595 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10596 if ((a_chk->data == NULL) ||
10597 (a_chk->whoTo == NULL)) {
10598 /* rats, no mbuf memory */
10600 /* was a problem with the destination */
10601 sctp_m_freem(a_chk->data);
10602 a_chk->data = NULL;
10604 sctp_free_a_chunk(stcb, a_chk, so_locked);
10605 /* sa_ignore NO_NULL_CHK */
10606 if (stcb->asoc.delayed_ack) {
10607 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10608 stcb->sctp_ep, stcb, NULL,
10609 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10610 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10611 stcb->sctp_ep, stcb, NULL);
10613 stcb->asoc.send_sack = 1;
10617 /* ok, lets go through and fill it in */
10618 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10619 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10620 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10621 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10623 limit = mtod(a_chk->data, caddr_t);
10628 if ((asoc->sctp_cmt_on_off > 0) &&
10629 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10631 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10632 * received, then set high bit to 1, else 0. Reset
10635 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10636 asoc->cmt_dac_pkts_rcvd = 0;
10638 #ifdef SCTP_ASOCLOG_OF_TSNS
10639 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10640 stcb->asoc.cumack_log_atsnt++;
10641 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10642 stcb->asoc.cumack_log_atsnt = 0;
10645 /* reset the readers interpretation */
10646 stcb->freed_by_sorcv_sincelast = 0;
10648 if (type == SCTP_SELECTIVE_ACK) {
10649 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10651 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10652 if (highest_tsn > asoc->mapping_array_base_tsn) {
10653 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10655 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10659 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10660 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10661 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10662 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10664 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10668 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10671 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10673 if (((type == SCTP_SELECTIVE_ACK) &&
10674 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10675 ((type == SCTP_NR_SELECTIVE_ACK) &&
10676 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10677 /* we have a gap .. maybe */
10678 for (i = 0; i < siz; i++) {
10679 tsn_map = asoc->mapping_array[i];
10680 if (type == SCTP_SELECTIVE_ACK) {
10681 tsn_map |= asoc->nr_mapping_array[i];
10685 * Clear all bits corresponding to TSNs
10686 * smaller or equal to the cumulative TSN.
10688 tsn_map &= (~0U << (1 - offset));
10690 selector = &sack_array[tsn_map];
10691 if (mergeable && selector->right_edge) {
10693 * Backup, left and right edges were ok to
10699 if (selector->num_entries == 0)
10702 for (j = 0; j < selector->num_entries; j++) {
10703 if (mergeable && selector->right_edge) {
10705 * do a merge by NOT setting
10711 * no merge, set the left
10715 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10717 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10720 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10726 if (selector->left_edge) {
10730 if (limit_reached) {
10731 /* Reached the limit stop */
10737 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10738 (limit_reached == 0)) {
10742 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10743 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10745 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10748 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10751 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10753 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10754 /* we have a gap .. maybe */
10755 for (i = 0; i < siz; i++) {
10756 tsn_map = asoc->nr_mapping_array[i];
10759 * Clear all bits corresponding to
10760 * TSNs smaller or equal to the
10763 tsn_map &= (~0U << (1 - offset));
10765 selector = &sack_array[tsn_map];
10766 if (mergeable && selector->right_edge) {
10768 * Backup, left and right edges were
10771 num_nr_gap_blocks--;
10774 if (selector->num_entries == 0)
10777 for (j = 0; j < selector->num_entries; j++) {
10778 if (mergeable && selector->right_edge) {
10780 * do a merge by NOT
10787 * no merge, set the
10791 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10793 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10794 num_nr_gap_blocks++;
10796 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10802 if (selector->left_edge) {
10806 if (limit_reached) {
10807 /* Reached the limit stop */
10814 /* now we must add any dups we are going to report. */
10815 if ((limit_reached == 0) && (asoc->numduptsns)) {
10816 dup = (uint32_t *)gap_descriptor;
10817 for (i = 0; i < asoc->numduptsns; i++) {
10818 *dup = htonl(asoc->dup_tsns[i]);
10821 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10826 asoc->numduptsns = 0;
10829 * now that the chunk is prepared queue it to the control chunk
10832 if (type == SCTP_SELECTIVE_ACK) {
10833 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10834 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10835 num_dups * sizeof(int32_t));
10836 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10837 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10838 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10839 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10840 sack->sack.num_dup_tsns = htons(num_dups);
10841 sack->ch.chunk_type = type;
10842 sack->ch.chunk_flags = flags;
10843 sack->ch.chunk_length = htons(a_chk->send_size);
10845 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10846 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10847 num_dups * sizeof(int32_t));
10848 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10849 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10850 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10851 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10852 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10853 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10854 nr_sack->nr_sack.reserved = 0;
10855 nr_sack->ch.chunk_type = type;
10856 nr_sack->ch.chunk_flags = flags;
10857 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10859 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10860 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10861 asoc->ctrl_queue_cnt++;
10862 asoc->send_sack = 0;
10863 SCTP_STAT_INCR(sctps_sendsacks);
10868 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10869 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10874 struct mbuf *m_abort, *m, *m_last;
10875 struct mbuf *m_out, *m_end = NULL;
10876 struct sctp_abort_chunk *abort;
10877 struct sctp_auth_chunk *auth = NULL;
10878 struct sctp_nets *net;
10880 uint32_t auth_offset = 0;
10882 uint16_t cause_len, chunk_len, padding_len;
10884 SCTP_TCB_LOCK_ASSERT(stcb);
10886 * Add an AUTH chunk, if chunk requires it and save the offset into
10887 * the chain for AUTH
10889 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10890 stcb->asoc.peer_auth_chunks)) {
10891 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10892 stcb, SCTP_ABORT_ASSOCIATION);
10893 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10897 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10898 if (m_abort == NULL) {
10900 sctp_m_freem(m_out);
10903 sctp_m_freem(operr);
10907 /* link in any error */
10908 SCTP_BUF_NEXT(m_abort) = operr;
10911 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10912 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10913 if (SCTP_BUF_NEXT(m) == NULL) {
10917 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10918 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10919 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10920 if (m_out == NULL) {
10921 /* NO Auth chunk prepended, so reserve space in front */
10922 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10925 /* Put AUTH chunk at the front of the chain */
10926 SCTP_BUF_NEXT(m_end) = m_abort;
10928 if (stcb->asoc.alternate) {
10929 net = stcb->asoc.alternate;
10931 net = stcb->asoc.primary_destination;
10933 /* Fill in the ABORT chunk header. */
10934 abort = mtod(m_abort, struct sctp_abort_chunk *);
10935 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10936 if (stcb->asoc.peer_vtag == 0) {
10937 /* This happens iff the assoc is in COOKIE-WAIT state. */
10938 vtag = stcb->asoc.my_vtag;
10939 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10941 vtag = stcb->asoc.peer_vtag;
10942 abort->ch.chunk_flags = 0;
10944 abort->ch.chunk_length = htons(chunk_len);
10945 /* Add padding, if necessary. */
10946 if (padding_len > 0) {
10947 if ((m_last == NULL) ||
10948 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10949 sctp_m_freem(m_out);
10953 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10954 (struct sockaddr *)&net->ro._l_addr,
10955 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10956 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10957 stcb->asoc.primary_destination->port, NULL,
10960 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10961 if (error == ENOBUFS) {
10962 stcb->asoc.ifp_had_enobuf = 1;
10963 SCTP_STAT_INCR(sctps_lowlevelerr);
10966 stcb->asoc.ifp_had_enobuf = 0;
10968 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10972 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10973 struct sctp_nets *net,
10976 /* formulate and SEND a SHUTDOWN-COMPLETE */
10977 struct mbuf *m_shutdown_comp;
10978 struct sctp_shutdown_complete_chunk *shutdown_complete;
10983 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10984 if (m_shutdown_comp == NULL) {
10988 if (reflect_vtag) {
10989 flags = SCTP_HAD_NO_TCB;
10990 vtag = stcb->asoc.my_vtag;
10993 vtag = stcb->asoc.peer_vtag;
10995 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10996 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10997 shutdown_complete->ch.chunk_flags = flags;
10998 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10999 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11000 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11001 (struct sockaddr *)&net->ro._l_addr,
11002 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11003 stcb->sctp_ep->sctp_lport, stcb->rport,
11007 SCTP_SO_NOT_LOCKED))) {
11008 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11009 if (error == ENOBUFS) {
11010 stcb->asoc.ifp_had_enobuf = 1;
11011 SCTP_STAT_INCR(sctps_lowlevelerr);
11014 stcb->asoc.ifp_had_enobuf = 0;
11016 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11021 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11022 struct sctphdr *sh, uint32_t vtag,
11023 uint8_t type, struct mbuf *cause,
11024 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11025 uint32_t vrf_id, uint16_t port)
11027 struct mbuf *o_pak;
11029 struct sctphdr *shout;
11030 struct sctp_chunkhdr *ch;
11031 #if defined(INET) || defined(INET6)
11032 struct udphdr *udp;
11035 int len, cause_len, padding_len;
11037 struct sockaddr_in *src_sin, *dst_sin;
11041 struct sockaddr_in6 *src_sin6, *dst_sin6;
11042 struct ip6_hdr *ip6;
11045 /* Compute the length of the cause and add final padding. */
11047 if (cause != NULL) {
11048 struct mbuf *m_at, *m_last = NULL;
11050 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11051 if (SCTP_BUF_NEXT(m_at) == NULL)
11053 cause_len += SCTP_BUF_LEN(m_at);
11055 padding_len = cause_len % 4;
11056 if (padding_len != 0) {
11057 padding_len = 4 - padding_len;
11059 if (padding_len != 0) {
11060 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11061 sctp_m_freem(cause);
11068 /* Get an mbuf for the header. */
11069 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11070 switch (dst->sa_family) {
11073 len += sizeof(struct ip);
11078 len += sizeof(struct ip6_hdr);
11084 #if defined(INET) || defined(INET6)
11086 len += sizeof(struct udphdr);
11089 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11090 if (mout == NULL) {
11092 sctp_m_freem(cause);
11096 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11097 SCTP_BUF_LEN(mout) = len;
11098 SCTP_BUF_NEXT(mout) = cause;
11099 M_SETFIB(mout, fibnum);
11100 mout->m_pkthdr.flowid = mflowid;
11101 M_HASHTYPE_SET(mout, mflowtype);
11108 switch (dst->sa_family) {
11111 src_sin = (struct sockaddr_in *)src;
11112 dst_sin = (struct sockaddr_in *)dst;
11113 ip = mtod(mout, struct ip *);
11114 ip->ip_v = IPVERSION;
11115 ip->ip_hl = (sizeof(struct ip) >> 2);
11117 ip->ip_off = htons(IP_DF);
11119 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11121 ip->ip_p = IPPROTO_UDP;
11123 ip->ip_p = IPPROTO_SCTP;
11125 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11126 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11128 len = sizeof(struct ip);
11129 shout = (struct sctphdr *)((caddr_t)ip + len);
11134 src_sin6 = (struct sockaddr_in6 *)src;
11135 dst_sin6 = (struct sockaddr_in6 *)dst;
11136 ip6 = mtod(mout, struct ip6_hdr *);
11137 ip6->ip6_flow = htonl(0x60000000);
11138 if (V_ip6_auto_flowlabel) {
11139 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11141 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11143 ip6->ip6_nxt = IPPROTO_UDP;
11145 ip6->ip6_nxt = IPPROTO_SCTP;
11147 ip6->ip6_src = dst_sin6->sin6_addr;
11148 ip6->ip6_dst = src_sin6->sin6_addr;
11149 len = sizeof(struct ip6_hdr);
11150 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11155 shout = mtod(mout, struct sctphdr *);
11158 #if defined(INET) || defined(INET6)
11160 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11161 sctp_m_freem(mout);
11164 udp = (struct udphdr *)shout;
11165 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11166 udp->uh_dport = port;
11168 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11169 sizeof(struct sctphdr) +
11170 sizeof(struct sctp_chunkhdr) +
11171 cause_len + padding_len));
11172 len += sizeof(struct udphdr);
11173 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11178 shout->src_port = sh->dest_port;
11179 shout->dest_port = sh->src_port;
11180 shout->checksum = 0;
11182 shout->v_tag = htonl(vtag);
11184 shout->v_tag = sh->v_tag;
11186 len += sizeof(struct sctphdr);
11187 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11188 ch->chunk_type = type;
11190 ch->chunk_flags = 0;
11192 ch->chunk_flags = SCTP_HAD_NO_TCB;
11194 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11195 len += sizeof(struct sctp_chunkhdr);
11196 len += cause_len + padding_len;
11198 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11199 sctp_m_freem(mout);
11202 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11203 switch (dst->sa_family) {
11208 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11213 ip->ip_len = htons(len);
11215 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11216 SCTP_STAT_INCR(sctps_sendswcrc);
11218 SCTP_ENABLE_UDP_CSUM(o_pak);
11221 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11222 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11223 SCTP_STAT_INCR(sctps_sendhwcrc);
11225 #ifdef SCTP_PACKET_LOGGING
11226 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11227 sctp_packet_log(o_pak);
11230 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11235 ip6->ip6_plen = (uint16_t)(len - sizeof(struct ip6_hdr));
11237 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11238 SCTP_STAT_INCR(sctps_sendswcrc);
11239 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11240 udp->uh_sum = 0xffff;
11243 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11244 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11245 SCTP_STAT_INCR(sctps_sendhwcrc);
11247 #ifdef SCTP_PACKET_LOGGING
11248 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11249 sctp_packet_log(o_pak);
11252 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11256 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11258 sctp_m_freem(mout);
11259 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11262 SCTP_STAT_INCR(sctps_sendpackets);
11263 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11264 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11269 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11270 struct sctphdr *sh,
11271 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11272 uint32_t vrf_id, uint16_t port)
11274 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11275 mflowtype, mflowid, fibnum,
11280 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11281 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11286 struct sctp_tmit_chunk *chk;
11287 struct sctp_heartbeat_chunk *hb;
11288 struct timeval now;
11290 SCTP_TCB_LOCK_ASSERT(stcb);
11294 (void)SCTP_GETTIME_TIMEVAL(&now);
11295 switch (net->ro._l_addr.sa.sa_family) {
11307 sctp_alloc_a_chunk(stcb, chk);
11309 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11312 chk->copy_by_ref = 0;
11313 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11314 chk->rec.chunk_id.can_take_data = 1;
11316 chk->asoc = &stcb->asoc;
11317 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11319 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11320 if (chk->data == NULL) {
11321 sctp_free_a_chunk(stcb, chk, so_locked);
11324 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11325 SCTP_BUF_LEN(chk->data) = chk->send_size;
11326 chk->sent = SCTP_DATAGRAM_UNSENT;
11327 chk->snd_count = 0;
11329 atomic_add_int(&chk->whoTo->ref_count, 1);
11330 /* Now we have a mbuf that we can fill in with the details */
11331 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11332 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11333 /* fill out chunk header */
11334 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11335 hb->ch.chunk_flags = 0;
11336 hb->ch.chunk_length = htons(chk->send_size);
11337 /* Fill out hb parameter */
11338 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11339 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11340 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11341 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11342 /* Did our user request this one, put it in */
11343 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11344 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11345 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11347 * we only take from the entropy pool if the address is not
11350 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11351 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11353 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11354 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11356 switch (net->ro._l_addr.sa.sa_family) {
11359 memcpy(hb->heartbeat.hb_info.address,
11360 &net->ro._l_addr.sin.sin_addr,
11361 sizeof(net->ro._l_addr.sin.sin_addr));
11366 memcpy(hb->heartbeat.hb_info.address,
11367 &net->ro._l_addr.sin6.sin6_addr,
11368 sizeof(net->ro._l_addr.sin6.sin6_addr));
11373 sctp_m_freem(chk->data);
11376 sctp_free_a_chunk(stcb, chk, so_locked);
11380 net->hb_responded = 0;
11381 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11382 stcb->asoc.ctrl_queue_cnt++;
11383 SCTP_STAT_INCR(sctps_sendheartbeat);
11388 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11391 struct sctp_association *asoc;
11392 struct sctp_ecne_chunk *ecne;
11393 struct sctp_tmit_chunk *chk;
11398 asoc = &stcb->asoc;
11399 SCTP_TCB_LOCK_ASSERT(stcb);
11400 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11401 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11402 /* found a previous ECN_ECHO update it if needed */
11403 uint32_t cnt, ctsn;
11405 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11406 ctsn = ntohl(ecne->tsn);
11407 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11408 ecne->tsn = htonl(high_tsn);
11409 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11411 cnt = ntohl(ecne->num_pkts_since_cwr);
11413 ecne->num_pkts_since_cwr = htonl(cnt);
11417 /* nope could not find one to update so we must build one */
11418 sctp_alloc_a_chunk(stcb, chk);
11422 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11423 chk->copy_by_ref = 0;
11424 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11425 chk->rec.chunk_id.can_take_data = 0;
11427 chk->asoc = &stcb->asoc;
11428 chk->send_size = sizeof(struct sctp_ecne_chunk);
11429 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11430 if (chk->data == NULL) {
11431 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11434 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11435 SCTP_BUF_LEN(chk->data) = chk->send_size;
11436 chk->sent = SCTP_DATAGRAM_UNSENT;
11437 chk->snd_count = 0;
11439 atomic_add_int(&chk->whoTo->ref_count, 1);
11441 stcb->asoc.ecn_echo_cnt_onq++;
11442 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11443 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11444 ecne->ch.chunk_flags = 0;
11445 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11446 ecne->tsn = htonl(high_tsn);
11447 ecne->num_pkts_since_cwr = htonl(1);
11448 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11449 asoc->ctrl_queue_cnt++;
11453 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11454 struct mbuf *m, int len, int iphlen, int bad_crc)
11456 struct sctp_association *asoc;
11457 struct sctp_pktdrop_chunk *drp;
11458 struct sctp_tmit_chunk *chk;
11464 struct sctp_chunkhdr *ch, chunk_buf;
11465 unsigned int chk_length;
11470 asoc = &stcb->asoc;
11471 SCTP_TCB_LOCK_ASSERT(stcb);
11472 if (asoc->pktdrop_supported == 0) {
11474 * peer must declare support before I send one.
11478 if (stcb->sctp_socket == NULL) {
11481 sctp_alloc_a_chunk(stcb, chk);
11485 chk->copy_by_ref = 0;
11486 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11487 chk->rec.chunk_id.can_take_data = 1;
11490 chk->send_size = len;
11491 /* Validate that we do not have an ABORT in here. */
11492 offset = iphlen + sizeof(struct sctphdr);
11493 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11494 sizeof(*ch), (uint8_t *)&chunk_buf);
11495 while (ch != NULL) {
11496 chk_length = ntohs(ch->chunk_length);
11497 if (chk_length < sizeof(*ch)) {
11498 /* break to abort land */
11501 switch (ch->chunk_type) {
11502 case SCTP_PACKET_DROPPED:
11503 case SCTP_ABORT_ASSOCIATION:
11504 case SCTP_INITIATION_ACK:
11506 * We don't respond with an PKT-DROP to an ABORT
11507 * or PKT-DROP. We also do not respond to an
11508 * INIT-ACK, because we can't know if the initiation
11509 * tag is correct or not.
11511 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11516 offset += SCTP_SIZE32(chk_length);
11517 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11518 sizeof(*ch), (uint8_t *)&chunk_buf);
11521 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11522 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11524 * only send 1 mtu worth, trim off the excess on the end.
11527 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11530 chk->asoc = &stcb->asoc;
11531 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11532 if (chk->data == NULL) {
11534 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11537 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11538 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11540 sctp_m_freem(chk->data);
11544 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11545 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11546 chk->book_size_scale = 0;
11548 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11549 drp->trunc_len = htons(fullsz);
11551 * Len is already adjusted to size minus overhead above take
11552 * out the pkt_drop chunk itself from it.
11554 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11555 len = chk->send_size;
11557 /* no truncation needed */
11558 drp->ch.chunk_flags = 0;
11559 drp->trunc_len = htons(0);
11562 drp->ch.chunk_flags |= SCTP_BADCRC;
11564 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11565 SCTP_BUF_LEN(chk->data) = chk->send_size;
11566 chk->sent = SCTP_DATAGRAM_UNSENT;
11567 chk->snd_count = 0;
11569 /* we should hit here */
11571 atomic_add_int(&chk->whoTo->ref_count, 1);
11575 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11576 drp->ch.chunk_length = htons(chk->send_size);
11577 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11581 drp->bottle_bw = htonl(spc);
11582 if (asoc->my_rwnd) {
11583 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11584 asoc->size_on_all_streams +
11585 asoc->my_rwnd_control_len +
11586 stcb->sctp_socket->so_rcv.sb_cc);
11589 * If my rwnd is 0, possibly from mbuf depletion as well as
11590 * space used, tell the peer there is NO space aka onq == bw
11592 drp->current_onq = htonl(spc);
11596 m_copydata(m, iphlen, len, (caddr_t)datap);
11597 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11598 asoc->ctrl_queue_cnt++;
11602 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11604 struct sctp_association *asoc;
11605 struct sctp_cwr_chunk *cwr;
11606 struct sctp_tmit_chunk *chk;
11608 SCTP_TCB_LOCK_ASSERT(stcb);
11612 asoc = &stcb->asoc;
11613 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11614 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11616 * found a previous CWR queued to same destination
11617 * update it if needed
11621 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11622 ctsn = ntohl(cwr->tsn);
11623 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11624 cwr->tsn = htonl(high_tsn);
11626 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11627 /* Make sure override is carried */
11628 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11633 sctp_alloc_a_chunk(stcb, chk);
11637 chk->copy_by_ref = 0;
11638 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11639 chk->rec.chunk_id.can_take_data = 1;
11641 chk->asoc = &stcb->asoc;
11642 chk->send_size = sizeof(struct sctp_cwr_chunk);
11643 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11644 if (chk->data == NULL) {
11645 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11648 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11649 SCTP_BUF_LEN(chk->data) = chk->send_size;
11650 chk->sent = SCTP_DATAGRAM_UNSENT;
11651 chk->snd_count = 0;
11653 atomic_add_int(&chk->whoTo->ref_count, 1);
11654 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11655 cwr->ch.chunk_type = SCTP_ECN_CWR;
11656 cwr->ch.chunk_flags = override;
11657 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11658 cwr->tsn = htonl(high_tsn);
11659 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11660 asoc->ctrl_queue_cnt++;
11664 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11665 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11667 uint16_t len, old_len, i;
11668 struct sctp_stream_reset_out_request *req_out;
11669 struct sctp_chunkhdr *ch;
11671 int number_entries = 0;
11673 ch = mtod(chk->data, struct sctp_chunkhdr *);
11674 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11675 /* get to new offset for the param. */
11676 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11677 /* now how long will this param be? */
11678 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11679 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11680 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11681 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11685 if (number_entries == 0) {
11688 if (number_entries == stcb->asoc.streamoutcnt) {
11689 number_entries = 0;
11691 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11692 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11694 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11695 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11696 req_out->ph.param_length = htons(len);
11697 req_out->request_seq = htonl(seq);
11698 req_out->response_seq = htonl(resp_seq);
11699 req_out->send_reset_at_tsn = htonl(last_sent);
11701 if (number_entries) {
11702 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11703 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11704 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11705 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11706 req_out->list_of_streams[at] = htons(i);
11708 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11709 if (at >= number_entries) {
11715 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11716 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11719 if (SCTP_SIZE32(len) > len) {
11721 * Need to worry about the pad we may end up adding to the
11722 * end. This is easy since the struct is either aligned to 4
11723 * bytes or 2 bytes off.
11725 req_out->list_of_streams[number_entries] = 0;
11727 /* now fix the chunk length */
11728 ch->chunk_length = htons(len + old_len);
11729 chk->book_size = len + old_len;
11730 chk->book_size_scale = 0;
11731 chk->send_size = SCTP_SIZE32(chk->book_size);
11732 SCTP_BUF_LEN(chk->data) = chk->send_size;
11737 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11738 int number_entries, uint16_t *list,
11741 uint16_t len, old_len, i;
11742 struct sctp_stream_reset_in_request *req_in;
11743 struct sctp_chunkhdr *ch;
11745 ch = mtod(chk->data, struct sctp_chunkhdr *);
11746 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11748 /* get to new offset for the param. */
11749 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11750 /* now how long will this param be? */
11751 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11752 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11753 req_in->ph.param_length = htons(len);
11754 req_in->request_seq = htonl(seq);
11755 if (number_entries) {
11756 for (i = 0; i < number_entries; i++) {
11757 req_in->list_of_streams[i] = htons(list[i]);
11760 if (SCTP_SIZE32(len) > len) {
11762 * Need to worry about the pad we may end up adding to the
11763 * end. This is easy since the struct is either aligned to 4
11764 * bytes or 2 bytes off.
11766 req_in->list_of_streams[number_entries] = 0;
11768 /* now fix the chunk length */
11769 ch->chunk_length = htons(len + old_len);
11770 chk->book_size = len + old_len;
11771 chk->book_size_scale = 0;
11772 chk->send_size = SCTP_SIZE32(chk->book_size);
11773 SCTP_BUF_LEN(chk->data) = chk->send_size;
11778 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11781 uint16_t len, old_len;
11782 struct sctp_stream_reset_tsn_request *req_tsn;
11783 struct sctp_chunkhdr *ch;
11785 ch = mtod(chk->data, struct sctp_chunkhdr *);
11786 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11788 /* get to new offset for the param. */
11789 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11790 /* now how long will this param be? */
11791 len = sizeof(struct sctp_stream_reset_tsn_request);
11792 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11793 req_tsn->ph.param_length = htons(len);
11794 req_tsn->request_seq = htonl(seq);
11796 /* now fix the chunk length */
11797 ch->chunk_length = htons(len + old_len);
11798 chk->send_size = len + old_len;
11799 chk->book_size = SCTP_SIZE32(chk->send_size);
11800 chk->book_size_scale = 0;
11801 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11806 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11807 uint32_t resp_seq, uint32_t result)
11809 uint16_t len, old_len;
11810 struct sctp_stream_reset_response *resp;
11811 struct sctp_chunkhdr *ch;
11813 ch = mtod(chk->data, struct sctp_chunkhdr *);
11814 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11816 /* get to new offset for the param. */
11817 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11818 /* now how long will this param be? */
11819 len = sizeof(struct sctp_stream_reset_response);
11820 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11821 resp->ph.param_length = htons(len);
11822 resp->response_seq = htonl(resp_seq);
11823 resp->result = ntohl(result);
11825 /* now fix the chunk length */
11826 ch->chunk_length = htons(len + old_len);
11827 chk->book_size = len + old_len;
11828 chk->book_size_scale = 0;
11829 chk->send_size = SCTP_SIZE32(chk->book_size);
11830 SCTP_BUF_LEN(chk->data) = chk->send_size;
11835 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11836 struct sctp_stream_reset_list *ent,
11839 struct sctp_association *asoc;
11840 struct sctp_tmit_chunk *chk;
11841 struct sctp_chunkhdr *ch;
11843 asoc = &stcb->asoc;
11846 * Reset our last reset action to the new one IP -> response
11847 * (PERFORMED probably). This assures that if we fail to send, a
11848 * retran from the peer will get the new response.
11850 asoc->last_reset_action[0] = response;
11851 if (asoc->stream_reset_outstanding) {
11854 sctp_alloc_a_chunk(stcb, chk);
11856 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11859 chk->copy_by_ref = 0;
11860 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11861 chk->rec.chunk_id.can_take_data = 0;
11863 chk->asoc = &stcb->asoc;
11864 chk->book_size = sizeof(struct sctp_chunkhdr);
11865 chk->send_size = SCTP_SIZE32(chk->book_size);
11866 chk->book_size_scale = 0;
11867 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11868 if (chk->data == NULL) {
11869 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11870 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11873 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11874 /* setup chunk parameters */
11875 chk->sent = SCTP_DATAGRAM_UNSENT;
11876 chk->snd_count = 0;
11877 if (stcb->asoc.alternate) {
11878 chk->whoTo = stcb->asoc.alternate;
11880 chk->whoTo = stcb->asoc.primary_destination;
11882 ch = mtod(chk->data, struct sctp_chunkhdr *);
11883 ch->chunk_type = SCTP_STREAM_RESET;
11884 ch->chunk_flags = 0;
11885 ch->chunk_length = htons(chk->book_size);
11886 atomic_add_int(&chk->whoTo->ref_count, 1);
11887 SCTP_BUF_LEN(chk->data) = chk->send_size;
11888 sctp_add_stream_reset_result(chk, ent->seq, response);
11889 /* insert the chunk for sending */
11890 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11893 asoc->ctrl_queue_cnt++;
11897 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11898 uint32_t resp_seq, uint32_t result,
11899 uint32_t send_una, uint32_t recv_next)
11901 uint16_t len, old_len;
11902 struct sctp_stream_reset_response_tsn *resp;
11903 struct sctp_chunkhdr *ch;
11905 ch = mtod(chk->data, struct sctp_chunkhdr *);
11906 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11908 /* get to new offset for the param. */
11909 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11910 /* now how long will this param be? */
11911 len = sizeof(struct sctp_stream_reset_response_tsn);
11912 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11913 resp->ph.param_length = htons(len);
11914 resp->response_seq = htonl(resp_seq);
11915 resp->result = htonl(result);
11916 resp->senders_next_tsn = htonl(send_una);
11917 resp->receivers_next_tsn = htonl(recv_next);
11919 /* now fix the chunk length */
11920 ch->chunk_length = htons(len + old_len);
11921 chk->book_size = len + old_len;
11922 chk->send_size = SCTP_SIZE32(chk->book_size);
11923 chk->book_size_scale = 0;
11924 SCTP_BUF_LEN(chk->data) = chk->send_size;
11929 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11933 uint16_t len, old_len;
11934 struct sctp_chunkhdr *ch;
11935 struct sctp_stream_reset_add_strm *addstr;
11937 ch = mtod(chk->data, struct sctp_chunkhdr *);
11938 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11940 /* get to new offset for the param. */
11941 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11942 /* now how long will this param be? */
11943 len = sizeof(struct sctp_stream_reset_add_strm);
11946 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11947 addstr->ph.param_length = htons(len);
11948 addstr->request_seq = htonl(seq);
11949 addstr->number_of_streams = htons(adding);
11950 addstr->reserved = 0;
11952 /* now fix the chunk length */
11953 ch->chunk_length = htons(len + old_len);
11954 chk->send_size = len + old_len;
11955 chk->book_size = SCTP_SIZE32(chk->send_size);
11956 chk->book_size_scale = 0;
11957 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11962 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11966 uint16_t len, old_len;
11967 struct sctp_chunkhdr *ch;
11968 struct sctp_stream_reset_add_strm *addstr;
11970 ch = mtod(chk->data, struct sctp_chunkhdr *);
11971 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11973 /* get to new offset for the param. */
11974 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11975 /* now how long will this param be? */
11976 len = sizeof(struct sctp_stream_reset_add_strm);
11978 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11979 addstr->ph.param_length = htons(len);
11980 addstr->request_seq = htonl(seq);
11981 addstr->number_of_streams = htons(adding);
11982 addstr->reserved = 0;
11984 /* now fix the chunk length */
11985 ch->chunk_length = htons(len + old_len);
11986 chk->send_size = len + old_len;
11987 chk->book_size = SCTP_SIZE32(chk->send_size);
11988 chk->book_size_scale = 0;
11989 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11994 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11996 struct sctp_association *asoc;
11997 struct sctp_tmit_chunk *chk;
11998 struct sctp_chunkhdr *ch;
12001 asoc = &stcb->asoc;
12002 asoc->trigger_reset = 0;
12003 if (asoc->stream_reset_outstanding) {
12006 sctp_alloc_a_chunk(stcb, chk);
12008 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12011 chk->copy_by_ref = 0;
12012 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12013 chk->rec.chunk_id.can_take_data = 0;
12015 chk->asoc = &stcb->asoc;
12016 chk->book_size = sizeof(struct sctp_chunkhdr);
12017 chk->send_size = SCTP_SIZE32(chk->book_size);
12018 chk->book_size_scale = 0;
12019 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12020 if (chk->data == NULL) {
12021 sctp_free_a_chunk(stcb, chk, so_locked);
12022 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12025 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12027 /* setup chunk parameters */
12028 chk->sent = SCTP_DATAGRAM_UNSENT;
12029 chk->snd_count = 0;
12030 if (stcb->asoc.alternate) {
12031 chk->whoTo = stcb->asoc.alternate;
12033 chk->whoTo = stcb->asoc.primary_destination;
12035 ch = mtod(chk->data, struct sctp_chunkhdr *);
12036 ch->chunk_type = SCTP_STREAM_RESET;
12037 ch->chunk_flags = 0;
12038 ch->chunk_length = htons(chk->book_size);
12039 atomic_add_int(&chk->whoTo->ref_count, 1);
12040 SCTP_BUF_LEN(chk->data) = chk->send_size;
12041 seq = stcb->asoc.str_reset_seq_out;
12042 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12044 asoc->stream_reset_outstanding++;
12046 m_freem(chk->data);
12048 sctp_free_a_chunk(stcb, chk, so_locked);
12051 asoc->str_reset = chk;
12052 /* insert the chunk for sending */
12053 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12056 asoc->ctrl_queue_cnt++;
12058 if (stcb->asoc.send_sack) {
12059 sctp_send_sack(stcb, so_locked);
12061 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12066 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12067 uint16_t number_entries, uint16_t *list,
12068 uint8_t send_in_req,
12069 uint8_t send_tsn_req,
12070 uint8_t add_stream,
12072 uint16_t adding_i, uint8_t peer_asked)
12074 struct sctp_association *asoc;
12075 struct sctp_tmit_chunk *chk;
12076 struct sctp_chunkhdr *ch;
12077 int can_send_out_req = 0;
12080 asoc = &stcb->asoc;
12081 if (asoc->stream_reset_outstanding) {
12083 * Already one pending, must get ACK back to clear the flag.
12085 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12088 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12089 (add_stream == 0)) {
12090 /* nothing to do */
12091 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12094 if (send_tsn_req && send_in_req) {
12095 /* error, can't do that */
12096 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12098 } else if (send_in_req) {
12099 can_send_out_req = 1;
12101 if (number_entries > (MCLBYTES -
12102 SCTP_MIN_OVERHEAD -
12103 sizeof(struct sctp_chunkhdr) -
12104 sizeof(struct sctp_stream_reset_out_request)) /
12105 sizeof(uint16_t)) {
12106 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12109 sctp_alloc_a_chunk(stcb, chk);
12111 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12114 chk->copy_by_ref = 0;
12115 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12116 chk->rec.chunk_id.can_take_data = 0;
12118 chk->asoc = &stcb->asoc;
12119 chk->book_size = sizeof(struct sctp_chunkhdr);
12120 chk->send_size = SCTP_SIZE32(chk->book_size);
12121 chk->book_size_scale = 0;
12123 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12124 if (chk->data == NULL) {
12125 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12126 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12129 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12131 /* setup chunk parameters */
12132 chk->sent = SCTP_DATAGRAM_UNSENT;
12133 chk->snd_count = 0;
12134 if (stcb->asoc.alternate) {
12135 chk->whoTo = stcb->asoc.alternate;
12137 chk->whoTo = stcb->asoc.primary_destination;
12139 atomic_add_int(&chk->whoTo->ref_count, 1);
12140 ch = mtod(chk->data, struct sctp_chunkhdr *);
12141 ch->chunk_type = SCTP_STREAM_RESET;
12142 ch->chunk_flags = 0;
12143 ch->chunk_length = htons(chk->book_size);
12144 SCTP_BUF_LEN(chk->data) = chk->send_size;
12146 seq = stcb->asoc.str_reset_seq_out;
12147 if (can_send_out_req) {
12150 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12153 asoc->stream_reset_outstanding++;
12156 if ((add_stream & 1) &&
12157 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12158 /* Need to allocate more */
12159 struct sctp_stream_out *oldstream;
12160 struct sctp_stream_queue_pending *sp, *nsp;
12162 #if defined(SCTP_DETAILED_STR_STATS)
12166 oldstream = stcb->asoc.strmout;
12167 /* get some more */
12168 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12169 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12171 if (stcb->asoc.strmout == NULL) {
12174 stcb->asoc.strmout = oldstream;
12175 /* Turn off the bit */
12176 x = add_stream & 0xfe;
12181 * Ok now we proceed with copying the old out stuff and
12182 * initializing the new stuff.
12184 SCTP_TCB_SEND_LOCK(stcb);
12185 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12186 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12187 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12188 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12189 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12190 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12191 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12192 stcb->asoc.strmout[i].sid = i;
12193 stcb->asoc.strmout[i].state = oldstream[i].state;
12194 /* FIX ME FIX ME */
12196 * This should be a SS_COPY operation FIX ME STREAM
12199 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12200 /* now anything on those queues? */
12201 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12202 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12203 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12207 /* now the new streams */
12208 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12209 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12210 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12211 stcb->asoc.strmout[i].chunks_on_queues = 0;
12212 #if defined(SCTP_DETAILED_STR_STATS)
12213 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12214 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12215 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12218 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12219 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12221 stcb->asoc.strmout[i].next_mid_ordered = 0;
12222 stcb->asoc.strmout[i].next_mid_unordered = 0;
12223 stcb->asoc.strmout[i].sid = i;
12224 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12225 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12226 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12228 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12229 SCTP_FREE(oldstream, SCTP_M_STRMO);
12230 SCTP_TCB_SEND_UNLOCK(stcb);
12233 if ((add_stream & 1) && (adding_o > 0)) {
12234 asoc->strm_pending_add_size = adding_o;
12235 asoc->peer_req_out = peer_asked;
12236 sctp_add_an_out_stream(chk, seq, adding_o);
12238 asoc->stream_reset_outstanding++;
12240 if ((add_stream & 2) && (adding_i > 0)) {
12241 sctp_add_an_in_stream(chk, seq, adding_i);
12243 asoc->stream_reset_outstanding++;
12246 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12248 asoc->stream_reset_outstanding++;
12250 if (send_tsn_req) {
12251 sctp_add_stream_reset_tsn(chk, seq);
12252 asoc->stream_reset_outstanding++;
12254 asoc->str_reset = chk;
12255 /* insert the chunk for sending */
12256 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12259 asoc->ctrl_queue_cnt++;
12260 if (stcb->asoc.send_sack) {
12261 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12263 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12268 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12269 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12270 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12271 uint32_t vrf_id, uint16_t port)
12273 /* Don't respond to an ABORT with an ABORT. */
12274 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12276 sctp_m_freem(cause);
12279 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12280 mflowtype, mflowid, fibnum,
12286 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12287 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12288 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12289 uint32_t vrf_id, uint16_t port)
12291 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12292 mflowtype, mflowid, fibnum,
12297 static struct mbuf *
12298 sctp_copy_resume(struct uio *uio,
12300 int user_marks_eor,
12303 struct mbuf **new_tail)
12307 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12308 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12310 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12313 *sndout = m_length(m, NULL);
12314 *new_tail = m_last(m);
12320 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12324 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12326 if (sp->data == NULL) {
12327 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12330 sp->tail_mbuf = m_last(sp->data);
12336 static struct sctp_stream_queue_pending *
12337 sctp_copy_it_in(struct sctp_tcb *stcb,
12338 struct sctp_association *asoc,
12339 struct sctp_sndrcvinfo *srcv,
12341 struct sctp_nets *net,
12343 int user_marks_eor,
12347 * This routine must be very careful in its work. Protocol
12348 * processing is up and running so care must be taken to spl...()
12349 * when you need to do something that may effect the stcb/asoc. The
12350 * sb is locked however. When data is copied the protocol processing
12351 * should be enabled since this is a slower operation...
12353 struct sctp_stream_queue_pending *sp = NULL;
12357 /* Now can we send this? */
12358 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12359 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12360 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12361 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12362 /* got data while shutting down */
12363 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12364 *error = ECONNRESET;
12367 sctp_alloc_a_strmoq(stcb, sp);
12369 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12374 sp->sender_all_done = 0;
12375 sp->sinfo_flags = srcv->sinfo_flags;
12376 sp->timetolive = srcv->sinfo_timetolive;
12377 sp->ppid = srcv->sinfo_ppid;
12378 sp->context = srcv->sinfo_context;
12380 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12382 sp->sid = srcv->sinfo_stream;
12383 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12384 if ((sp->length == (uint32_t)uio->uio_resid) &&
12385 ((user_marks_eor == 0) ||
12386 (srcv->sinfo_flags & SCTP_EOF) ||
12387 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12388 sp->msg_is_complete = 1;
12390 sp->msg_is_complete = 0;
12392 sp->sender_all_done = 0;
12393 sp->some_taken = 0;
12394 sp->put_last_out = 0;
12395 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12396 sp->data = sp->tail_mbuf = NULL;
12397 if (sp->length == 0) {
12400 if (srcv->sinfo_keynumber_valid) {
12401 sp->auth_keyid = srcv->sinfo_keynumber;
12403 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12405 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12406 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12407 sp->holds_key_ref = 1;
12409 *error = sctp_copy_one(sp, uio, resv_in_first);
12412 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12415 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12417 atomic_add_int(&sp->net->ref_count, 1);
12421 sctp_set_prsctp_policy(sp);
12429 sctp_sosend(struct socket *so,
12430 struct sockaddr *addr,
12433 struct mbuf *control,
12438 int error, use_sndinfo = 0;
12439 struct sctp_sndrcvinfo sndrcvninfo;
12440 struct sockaddr *addr_to_use;
12441 #if defined(INET) && defined(INET6)
12442 struct sockaddr_in sin;
12446 /* process cmsg snd/rcv info (maybe a assoc-id) */
12447 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12448 sizeof(sndrcvninfo))) {
12453 addr_to_use = addr;
12454 #if defined(INET) && defined(INET6)
12455 if ((addr) && (addr->sa_family == AF_INET6)) {
12456 struct sockaddr_in6 *sin6;
12458 sin6 = (struct sockaddr_in6 *)addr;
12459 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12460 in6_sin6_2_sin(&sin, sin6);
12461 addr_to_use = (struct sockaddr *)&sin;
12465 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12468 use_sndinfo ? &sndrcvninfo : NULL
12476 sctp_lower_sosend(struct socket *so,
12477 struct sockaddr *addr,
12479 struct mbuf *i_pak,
12480 struct mbuf *control,
12482 struct sctp_sndrcvinfo *srcv
12487 unsigned int sndlen = 0, max_len;
12489 struct mbuf *top = NULL;
12490 int queue_only = 0, queue_only_for_init = 0;
12491 int free_cnt_applied = 0;
12493 int now_filled = 0;
12494 unsigned int inqueue_bytes = 0;
12495 struct sctp_block_entry be;
12496 struct sctp_inpcb *inp;
12497 struct sctp_tcb *stcb = NULL;
12498 struct timeval now;
12499 struct sctp_nets *net;
12500 struct sctp_association *asoc;
12501 struct sctp_inpcb *t_inp;
12502 int user_marks_eor;
12503 int create_lock_applied = 0;
12504 int nagle_applies = 0;
12505 int some_on_control = 0;
12506 int got_all_of_the_send = 0;
12507 int hold_tcblock = 0;
12508 int non_blocking = 0;
12509 uint32_t local_add_more, local_soresv = 0;
12511 uint16_t sinfo_flags;
12512 sctp_assoc_t sinfo_assoc_id;
12519 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12521 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12524 SCTP_RELEASE_PKT(i_pak);
12528 if ((uio == NULL) && (i_pak == NULL)) {
12529 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12532 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12533 atomic_add_int(&inp->total_sends, 1);
12535 if (uio->uio_resid < 0) {
12536 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12539 sndlen = (unsigned int)uio->uio_resid;
12541 top = SCTP_HEADER_TO_CHAIN(i_pak);
12542 sndlen = SCTP_HEADER_LEN(i_pak);
12544 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12547 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12548 SCTP_IS_LISTENING(inp)) {
12549 /* The listener can NOT send */
12550 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12555 * Pre-screen address, if one is given the sin-len
12556 * must be set correctly!
12559 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12561 switch (raddr->sa.sa_family) {
12564 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12565 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12569 port = raddr->sin.sin_port;
12574 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12575 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12579 port = raddr->sin6.sin6_port;
12583 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12584 error = EAFNOSUPPORT;
12591 sinfo_flags = srcv->sinfo_flags;
12592 sinfo_assoc_id = srcv->sinfo_assoc_id;
12593 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12594 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12595 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12599 if (srcv->sinfo_flags)
12600 SCTP_STAT_INCR(sctps_sends_with_flags);
12602 sinfo_flags = inp->def_send.sinfo_flags;
12603 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12605 if (sinfo_flags & SCTP_SENDALL) {
12606 /* its a sendall */
12607 error = sctp_sendall(inp, uio, top, srcv);
12611 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12612 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12616 /* now we must find the assoc */
12617 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12618 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12619 SCTP_INP_RLOCK(inp);
12620 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12622 SCTP_TCB_LOCK(stcb);
12625 SCTP_INP_RUNLOCK(inp);
12626 } else if (sinfo_assoc_id) {
12627 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12628 if (stcb != NULL) {
12633 * Since we did not use findep we must
12634 * increment it, and if we don't find a tcb
12637 SCTP_INP_WLOCK(inp);
12638 SCTP_INP_INCR_REF(inp);
12639 SCTP_INP_WUNLOCK(inp);
12640 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12641 if (stcb == NULL) {
12642 SCTP_INP_WLOCK(inp);
12643 SCTP_INP_DECR_REF(inp);
12644 SCTP_INP_WUNLOCK(inp);
12649 if ((stcb == NULL) && (addr)) {
12650 /* Possible implicit send? */
12651 SCTP_ASOC_CREATE_LOCK(inp);
12652 create_lock_applied = 1;
12653 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12654 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12655 /* Should I really unlock ? */
12656 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12661 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12662 (addr->sa_family == AF_INET6)) {
12663 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12667 SCTP_INP_WLOCK(inp);
12668 SCTP_INP_INCR_REF(inp);
12669 SCTP_INP_WUNLOCK(inp);
12670 /* With the lock applied look again */
12671 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12672 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12673 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12675 if (stcb == NULL) {
12676 SCTP_INP_WLOCK(inp);
12677 SCTP_INP_DECR_REF(inp);
12678 SCTP_INP_WUNLOCK(inp);
12685 if (t_inp != inp) {
12686 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12691 if (stcb == NULL) {
12692 if (addr == NULL) {
12693 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12697 /* We must go ahead and start the INIT process */
12700 if ((sinfo_flags & SCTP_ABORT) ||
12701 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12703 * User asks to abort a non-existant assoc,
12704 * or EOF a non-existant assoc with no data
12706 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12710 /* get an asoc/stcb struct */
12711 vrf_id = inp->def_vrf_id;
12713 if (create_lock_applied == 0) {
12714 panic("Error, should hold create lock and I don't?");
12717 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12718 inp->sctp_ep.pre_open_stream_count,
12721 if (stcb == NULL) {
12722 /* Error is setup for us in the call */
12725 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12726 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12728 * Set the connected flag so we can queue
12731 soisconnecting(so);
12734 if (create_lock_applied) {
12735 SCTP_ASOC_CREATE_UNLOCK(inp);
12736 create_lock_applied = 0;
12738 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12741 * Turn on queue only flag to prevent data from
12745 asoc = &stcb->asoc;
12746 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12747 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12749 /* initialize authentication params for the assoc */
12750 sctp_initialize_auth_params(inp, stcb);
12753 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12754 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12755 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12761 /* out with the INIT */
12762 queue_only_for_init = 1;
12764 * we may want to dig in after this call and adjust the MTU
12765 * value. It defaulted to 1500 (constant) but the ro
12766 * structure may now have an update and thus we may need to
12767 * change it BEFORE we append the message.
12771 asoc = &stcb->asoc;
12773 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12774 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12776 net = sctp_findnet(stcb, addr);
12779 if ((net == NULL) ||
12780 ((port != 0) && (port != stcb->rport))) {
12781 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12786 if (stcb->asoc.alternate) {
12787 net = stcb->asoc.alternate;
12789 net = stcb->asoc.primary_destination;
12792 atomic_add_int(&stcb->total_sends, 1);
12793 /* Keep the stcb from being freed under our feet */
12794 atomic_add_int(&asoc->refcnt, 1);
12795 free_cnt_applied = 1;
12797 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12798 if (sndlen > asoc->smallest_mtu) {
12799 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12804 if (SCTP_SO_IS_NBIO(so)
12805 || (flags & MSG_NBIO)
12809 /* would we block? */
12810 if (non_blocking) {
12813 if (hold_tcblock == 0) {
12814 SCTP_TCB_LOCK(stcb);
12817 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12818 if (user_marks_eor == 0) {
12823 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12824 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12825 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12826 if (sndlen > SCTP_SB_LIMIT_SND(so))
12829 error = EWOULDBLOCK;
12832 stcb->asoc.sb_send_resv += sndlen;
12833 SCTP_TCB_UNLOCK(stcb);
12836 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12838 local_soresv = sndlen;
12839 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12840 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12841 error = ECONNRESET;
12844 if (create_lock_applied) {
12845 SCTP_ASOC_CREATE_UNLOCK(inp);
12846 create_lock_applied = 0;
12848 /* Is the stream no. valid? */
12849 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12850 /* Invalid stream number */
12851 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12855 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12856 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12858 * Can't queue any data while stream reset is underway.
12860 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12865 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12868 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12869 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12872 /* we are now done with all control */
12874 sctp_m_freem(control);
12877 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12878 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12879 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12880 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12881 if (srcv->sinfo_flags & SCTP_ABORT) {
12884 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12885 error = ECONNRESET;
12889 /* Ok, we will attempt a msgsnd :> */
12891 p->td_ru.ru_msgsnd++;
12893 /* Are we aborting? */
12894 if (srcv->sinfo_flags & SCTP_ABORT) {
12896 int tot_demand, tot_out = 0, max_out;
12898 SCTP_STAT_INCR(sctps_sends_with_abort);
12899 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12900 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12901 /* It has to be up before we abort */
12902 /* how big is the user initiated abort? */
12903 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12907 if (hold_tcblock) {
12908 SCTP_TCB_UNLOCK(stcb);
12912 struct mbuf *cntm = NULL;
12914 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12916 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12917 tot_out += SCTP_BUF_LEN(cntm);
12921 /* Must fit in a MTU */
12923 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12924 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12926 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12930 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12933 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12937 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12938 max_out -= sizeof(struct sctp_abort_msg);
12939 if (tot_out > max_out) {
12943 struct sctp_paramhdr *ph;
12945 /* now move forward the data pointer */
12946 ph = mtod(mm, struct sctp_paramhdr *);
12947 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12948 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12950 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12952 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12955 * Here if we can't get his data we
12956 * still abort we just don't get to
12957 * send the users note :-0
12964 SCTP_BUF_NEXT(mm) = top;
12968 if (hold_tcblock == 0) {
12969 SCTP_TCB_LOCK(stcb);
12971 atomic_add_int(&stcb->asoc.refcnt, -1);
12972 free_cnt_applied = 0;
12973 /* release this lock, otherwise we hang on ourselves */
12974 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12975 /* now relock the stcb so everything is sane */
12979 * In this case top is already chained to mm avoid double
12980 * free, since we free it below if top != NULL and driver
12981 * would free it after sending the packet out
12988 /* Calculate the maximum we can send */
12989 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12990 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12991 if (non_blocking) {
12992 /* we already checked for non-blocking above. */
12995 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13000 if (hold_tcblock) {
13001 SCTP_TCB_UNLOCK(stcb);
13004 if (asoc->strmout == NULL) {
13005 /* huh? software error */
13006 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13010 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13011 if ((user_marks_eor == 0) &&
13012 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13013 /* It will NEVER fit */
13014 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13018 if ((uio == NULL) && user_marks_eor) {
13020 * We do not support eeor mode for
13021 * sending with mbuf chains (like sendfile).
13023 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13027 if (user_marks_eor) {
13028 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13031 * For non-eeor the whole message must fit in
13032 * the socket send buffer.
13034 local_add_more = sndlen;
13037 if (non_blocking) {
13038 goto skip_preblock;
13040 if (((max_len <= local_add_more) &&
13041 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13043 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13044 /* No room right now ! */
13045 SOCKBUF_LOCK(&so->so_snd);
13046 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13047 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13048 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13049 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13050 (unsigned int)SCTP_SB_LIMIT_SND(so),
13053 stcb->asoc.stream_queue_cnt,
13054 stcb->asoc.chunks_on_out_queue,
13055 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13056 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13057 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13060 stcb->block_entry = &be;
13061 error = sbwait(&so->so_snd);
13062 stcb->block_entry = NULL;
13063 if (error || so->so_error || be.error) {
13066 error = so->so_error;
13071 SOCKBUF_UNLOCK(&so->so_snd);
13074 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13075 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13076 asoc, stcb->asoc.total_output_queue_size);
13078 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13079 SOCKBUF_UNLOCK(&so->so_snd);
13082 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13084 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13085 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13089 SOCKBUF_UNLOCK(&so->so_snd);
13092 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13096 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13097 * case NOTE: uio will be null when top/mbuf is passed
13100 if (srcv->sinfo_flags & SCTP_EOF) {
13101 got_all_of_the_send = 1;
13104 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13110 struct sctp_stream_queue_pending *sp;
13111 struct sctp_stream_out *strm;
13114 SCTP_TCB_SEND_LOCK(stcb);
13115 if ((asoc->stream_locked) &&
13116 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13117 SCTP_TCB_SEND_UNLOCK(stcb);
13118 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13122 SCTP_TCB_SEND_UNLOCK(stcb);
13124 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13125 if (strm->last_msg_incomplete == 0) {
13127 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13131 SCTP_TCB_SEND_LOCK(stcb);
13132 if (sp->msg_is_complete) {
13133 strm->last_msg_incomplete = 0;
13134 asoc->stream_locked = 0;
13137 * Just got locked to this guy in case of an
13140 strm->last_msg_incomplete = 1;
13141 if (stcb->asoc.idata_supported == 0) {
13142 asoc->stream_locked = 1;
13143 asoc->stream_locked_on = srcv->sinfo_stream;
13145 sp->sender_all_done = 0;
13147 sctp_snd_sb_alloc(stcb, sp->length);
13148 atomic_add_int(&asoc->stream_queue_cnt, 1);
13149 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13150 SCTP_STAT_INCR(sctps_sends_with_unord);
13152 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13153 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13154 SCTP_TCB_SEND_UNLOCK(stcb);
13156 SCTP_TCB_SEND_LOCK(stcb);
13157 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13158 SCTP_TCB_SEND_UNLOCK(stcb);
13160 /* ???? Huh ??? last msg is gone */
13162 panic("Warning: Last msg marked incomplete, yet nothing left?");
13164 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13165 strm->last_msg_incomplete = 0;
13171 while (uio->uio_resid > 0) {
13172 /* How much room do we have? */
13173 struct mbuf *new_tail, *mm;
13175 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13176 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13177 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13181 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13182 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13183 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13186 if (hold_tcblock) {
13187 SCTP_TCB_UNLOCK(stcb);
13190 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13191 if ((mm == NULL) || error) {
13197 /* Update the mbuf and count */
13198 SCTP_TCB_SEND_LOCK(stcb);
13199 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13201 * we need to get out. Peer probably
13205 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13206 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13207 error = ECONNRESET;
13209 SCTP_TCB_SEND_UNLOCK(stcb);
13212 if (sp->tail_mbuf) {
13213 /* tack it to the end */
13214 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13215 sp->tail_mbuf = new_tail;
13217 /* A stolen mbuf */
13219 sp->tail_mbuf = new_tail;
13221 sctp_snd_sb_alloc(stcb, sndout);
13222 atomic_add_int(&sp->length, sndout);
13224 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13225 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13227 /* Did we reach EOR? */
13228 if ((uio->uio_resid == 0) &&
13229 ((user_marks_eor == 0) ||
13230 (srcv->sinfo_flags & SCTP_EOF) ||
13231 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13232 sp->msg_is_complete = 1;
13234 sp->msg_is_complete = 0;
13236 SCTP_TCB_SEND_UNLOCK(stcb);
13238 if (uio->uio_resid == 0) {
13243 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13245 * This is ugly but we must assure locking
13248 if (hold_tcblock == 0) {
13249 SCTP_TCB_LOCK(stcb);
13252 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13253 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13254 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13255 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13261 SCTP_TCB_UNLOCK(stcb);
13264 /* wait for space now */
13265 if (non_blocking) {
13266 /* Non-blocking io in place out */
13269 /* What about the INIT, send it maybe */
13270 if (queue_only_for_init) {
13271 if (hold_tcblock == 0) {
13272 SCTP_TCB_LOCK(stcb);
13275 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13276 /* a collision took us forward? */
13279 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13280 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13284 if ((net->flight_size > net->cwnd) &&
13285 (asoc->sctp_cmt_on_off == 0)) {
13286 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13288 } else if (asoc->ifp_had_enobuf) {
13289 SCTP_STAT_INCR(sctps_ifnomemqueued);
13290 if (net->flight_size > (2 * net->mtu)) {
13293 asoc->ifp_had_enobuf = 0;
13295 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13296 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13297 (stcb->asoc.total_flight > 0) &&
13298 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13299 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13302 * Ok, Nagle is set on and we have data outstanding.
13303 * Don't send anything and let SACKs drive out the
13304 * data unless we have a "full" segment to send.
13306 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13307 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13309 SCTP_STAT_INCR(sctps_naglequeued);
13312 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13313 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13314 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13316 SCTP_STAT_INCR(sctps_naglesent);
13319 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13321 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13322 nagle_applies, un_sent);
13323 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13324 stcb->asoc.total_flight,
13325 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13327 if (queue_only_for_init)
13328 queue_only_for_init = 0;
13329 if ((queue_only == 0) && (nagle_applies == 0)) {
13331 * need to start chunk output
13332 * before blocking.. note that if
13333 * a lock is already applied, then
13334 * the input via the net is happening
13335 * and I don't need to start output :-D
13337 if (hold_tcblock == 0) {
13338 if (SCTP_TCB_TRYLOCK(stcb)) {
13340 sctp_chunk_output(inp,
13342 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13345 sctp_chunk_output(inp,
13347 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13349 if (hold_tcblock == 1) {
13350 SCTP_TCB_UNLOCK(stcb);
13354 SOCKBUF_LOCK(&so->so_snd);
13356 * This is a bit strange, but I think it will
13357 * work. The total_output_queue_size is locked and
13358 * protected by the TCB_LOCK, which we just released.
13359 * There is a race that can occur between releasing it
13360 * above, and me getting the socket lock, where sacks
13361 * come in but we have not put the SB_WAIT on the
13362 * so_snd buffer to get the wakeup. After the LOCK
13363 * is applied the sack_processing will also need to
13364 * LOCK the so->so_snd to do the actual sowwakeup(). So
13365 * once we have the socket buffer lock if we recheck the
13366 * size we KNOW we will get to sleep safely with the
13367 * wakeup flag in place.
13369 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13370 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13371 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13372 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13373 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13374 asoc, (size_t)uio->uio_resid);
13377 stcb->block_entry = &be;
13378 error = sbwait(&so->so_snd);
13379 stcb->block_entry = NULL;
13381 if (error || so->so_error || be.error) {
13384 error = so->so_error;
13389 SOCKBUF_UNLOCK(&so->so_snd);
13392 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13393 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13394 asoc, stcb->asoc.total_output_queue_size);
13397 SOCKBUF_UNLOCK(&so->so_snd);
13398 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13402 SCTP_TCB_SEND_LOCK(stcb);
13403 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13404 SCTP_TCB_SEND_UNLOCK(stcb);
13408 if (sp->msg_is_complete == 0) {
13409 strm->last_msg_incomplete = 1;
13410 if (stcb->asoc.idata_supported == 0) {
13411 asoc->stream_locked = 1;
13412 asoc->stream_locked_on = srcv->sinfo_stream;
13415 sp->sender_all_done = 1;
13416 strm->last_msg_incomplete = 0;
13417 asoc->stream_locked = 0;
13420 SCTP_PRINTF("Huh no sp TSNH?\n");
13421 strm->last_msg_incomplete = 0;
13422 asoc->stream_locked = 0;
13424 SCTP_TCB_SEND_UNLOCK(stcb);
13425 if (uio->uio_resid == 0) {
13426 got_all_of_the_send = 1;
13429 /* We send in a 0, since we do NOT have any locks */
13430 error = sctp_msg_append(stcb, net, top, srcv, 0);
13432 if (srcv->sinfo_flags & SCTP_EOF) {
13434 * This should only happen for Panda for the mbuf
13435 * send case, which does NOT yet support EEOR mode.
13436 * Thus, we can just set this flag to do the proper
13439 got_all_of_the_send = 1;
13447 if ((srcv->sinfo_flags & SCTP_EOF) &&
13448 (got_all_of_the_send == 1)) {
13449 SCTP_STAT_INCR(sctps_sends_with_eof);
13451 if (hold_tcblock == 0) {
13452 SCTP_TCB_LOCK(stcb);
13455 if (TAILQ_EMPTY(&asoc->send_queue) &&
13456 TAILQ_EMPTY(&asoc->sent_queue) &&
13457 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13458 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13461 /* there is nothing queued to send, so I'm done... */
13462 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13463 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13464 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13465 struct sctp_nets *netp;
13467 /* only send SHUTDOWN the first time through */
13468 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13469 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13471 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13472 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13473 sctp_stop_timers_for_shutdown(stcb);
13474 if (stcb->asoc.alternate) {
13475 netp = stcb->asoc.alternate;
13477 netp = stcb->asoc.primary_destination;
13479 sctp_send_shutdown(stcb, netp);
13480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13482 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13483 asoc->primary_destination);
13487 * we still got (or just got) data to send, so set
13491 * XXX sockets draft says that SCTP_EOF should be
13492 * sent with no data. currently, we will allow user
13493 * data to be sent first and move to
13496 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13497 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13498 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13499 if (hold_tcblock == 0) {
13500 SCTP_TCB_LOCK(stcb);
13503 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13504 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13506 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13507 if (TAILQ_EMPTY(&asoc->send_queue) &&
13508 TAILQ_EMPTY(&asoc->sent_queue) &&
13509 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13510 struct mbuf *op_err;
13511 char msg[SCTP_DIAG_INFO_LEN];
13514 if (free_cnt_applied) {
13515 atomic_add_int(&stcb->asoc.refcnt, -1);
13516 free_cnt_applied = 0;
13518 snprintf(msg, sizeof(msg),
13519 "%s:%d at %s", __FILE__, __LINE__, __func__);
13520 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13522 sctp_abort_an_association(stcb->sctp_ep, stcb,
13523 op_err, SCTP_SO_LOCKED);
13525 * now relock the stcb so everything
13532 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13533 asoc->primary_destination);
13534 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13539 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13540 some_on_control = 1;
13542 if (queue_only_for_init) {
13543 if (hold_tcblock == 0) {
13544 SCTP_TCB_LOCK(stcb);
13547 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13548 /* a collision took us forward? */
13551 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13552 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13556 if ((net->flight_size > net->cwnd) &&
13557 (stcb->asoc.sctp_cmt_on_off == 0)) {
13558 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13560 } else if (asoc->ifp_had_enobuf) {
13561 SCTP_STAT_INCR(sctps_ifnomemqueued);
13562 if (net->flight_size > (2 * net->mtu)) {
13565 asoc->ifp_had_enobuf = 0;
13567 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13568 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13569 (stcb->asoc.total_flight > 0) &&
13570 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13571 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13573 * Ok, Nagle is set on and we have data outstanding.
13574 * Don't send anything and let SACKs drive out the
13575 * data unless wen have a "full" segment to send.
13577 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13578 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13580 SCTP_STAT_INCR(sctps_naglequeued);
13583 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13584 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13585 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13587 SCTP_STAT_INCR(sctps_naglesent);
13590 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13591 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13592 nagle_applies, un_sent);
13593 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13594 stcb->asoc.total_flight,
13595 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13597 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13598 /* we can attempt to send too. */
13599 if (hold_tcblock == 0) {
13601 * If there is activity recv'ing sacks no need to
13604 if (SCTP_TCB_TRYLOCK(stcb)) {
13605 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13609 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13611 } else if ((queue_only == 0) &&
13612 (stcb->asoc.peers_rwnd == 0) &&
13613 (stcb->asoc.total_flight == 0)) {
13614 /* We get to have a probe outstanding */
13615 if (hold_tcblock == 0) {
13617 SCTP_TCB_LOCK(stcb);
13619 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13620 } else if (some_on_control) {
13621 int num_out, reason, frag_point;
13623 /* Here we do control only */
13624 if (hold_tcblock == 0) {
13626 SCTP_TCB_LOCK(stcb);
13628 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13629 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13630 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13632 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13633 queue_only, stcb->asoc.peers_rwnd, un_sent,
13634 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13635 stcb->asoc.total_output_queue_size, error);
13640 if (local_soresv && stcb) {
13641 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13643 if (create_lock_applied) {
13644 SCTP_ASOC_CREATE_UNLOCK(inp);
13646 if ((stcb) && hold_tcblock) {
13647 SCTP_TCB_UNLOCK(stcb);
13649 if (stcb && free_cnt_applied) {
13650 atomic_add_int(&stcb->asoc.refcnt, -1);
13654 if (mtx_owned(&stcb->tcb_mtx)) {
13655 panic("Leaving with tcb mtx owned?");
13657 if (mtx_owned(&stcb->tcb_send_mtx)) {
13658 panic("Leaving with tcb send mtx owned?");
13666 sctp_m_freem(control);
13673 * generate an AUTHentication chunk, if required
13676 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13677 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13678 struct sctp_tcb *stcb, uint8_t chunk)
13680 struct mbuf *m_auth;
13681 struct sctp_auth_chunk *auth;
13685 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13689 if (stcb->asoc.auth_supported == 0) {
13692 /* does the requested chunk require auth? */
13693 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13696 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13697 if (m_auth == NULL) {
13701 /* reserve some space if this will be the first mbuf */
13703 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13704 /* fill in the AUTH chunk details */
13705 auth = mtod(m_auth, struct sctp_auth_chunk *);
13706 memset(auth, 0, sizeof(*auth));
13707 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13708 auth->ch.chunk_flags = 0;
13709 chunk_len = sizeof(*auth) +
13710 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13711 auth->ch.chunk_length = htons(chunk_len);
13712 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13713 /* key id and hmac digest will be computed and filled in upon send */
13715 /* save the offset where the auth was inserted into the chain */
13717 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13718 *offset += SCTP_BUF_LEN(cn);
13721 /* update length and return pointer to the auth chunk */
13722 SCTP_BUF_LEN(m_auth) = chunk_len;
13723 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13724 if (auth_ret != NULL)
13732 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13734 struct nd_prefix *pfx = NULL;
13735 struct nd_pfxrouter *pfxrtr = NULL;
13736 struct sockaddr_in6 gw6;
13738 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13741 /* get prefix entry of address */
13743 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13744 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13746 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13747 &src6->sin6_addr, &pfx->ndpr_mask))
13750 /* no prefix entry in the prefix list */
13753 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13754 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13757 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13758 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13760 /* search installed gateway from prefix entry */
13761 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13762 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13763 gw6.sin6_family = AF_INET6;
13764 gw6.sin6_len = sizeof(struct sockaddr_in6);
13765 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13766 sizeof(struct in6_addr));
13767 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13768 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13769 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13770 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13771 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13773 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13778 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13784 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13787 struct sockaddr_in *sin, *mask;
13788 struct ifaddr *ifa;
13789 struct in_addr srcnetaddr, gwnetaddr;
13791 if (ro == NULL || ro->ro_rt == NULL ||
13792 sifa->address.sa.sa_family != AF_INET) {
13795 ifa = (struct ifaddr *)sifa->ifa;
13796 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13797 sin = &sifa->address.sin;
13798 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13799 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13800 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13801 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13803 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13804 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13805 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13806 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13807 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13808 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {