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;
2549 inp->next_addr_touse = starting_point;
2552 if (inp->next_addr_touse == NULL) {
2553 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2557 /* ok, what about an acceptable address in the inp */
2558 for (laddr = inp->next_addr_touse; laddr;
2559 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2560 if (laddr->ifa == NULL) {
2561 /* address has been removed */
2564 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2565 /* address is being deleted */
2568 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2572 atomic_add_int(&sifa->refcount, 1);
2575 if (resettotop == 0) {
2576 inp->next_addr_touse = NULL;
2577 goto once_again_too;
2581 * no address bound can be a source for the destination we are in
2589 static struct sctp_ifa *
2590 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2591 struct sctp_tcb *stcb,
2594 uint8_t dest_is_priv,
2595 uint8_t dest_is_loop,
2596 int non_asoc_addr_ok,
2599 struct sctp_laddr *laddr, *starting_point;
2601 struct sctp_ifn *sctp_ifn;
2602 struct sctp_ifa *sctp_ifa, *sifa;
2603 uint8_t start_at_beginning = 0;
2604 struct sctp_vrf *vrf;
2608 * first question, is the ifn we will emit on in our list, if so, we
2611 vrf = sctp_find_vrf(vrf_id);
2615 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2616 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2617 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2620 * first question, is the ifn we will emit on in our list? If so,
2621 * we want that one. First we look for a preferred. Second, we go
2622 * for an acceptable.
2625 /* first try for a preferred address on the ep */
2626 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2628 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2629 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2630 &sctp_ifa->address.sin.sin_addr) != 0)) {
2635 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2636 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2637 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2641 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2643 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2644 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2647 if (((non_asoc_addr_ok == 0) &&
2648 (sctp_is_addr_restricted(stcb, sifa))) ||
2649 (non_asoc_addr_ok &&
2650 (sctp_is_addr_restricted(stcb, sifa)) &&
2651 (!sctp_is_addr_pending(stcb, sifa)))) {
2652 /* on the no-no list */
2655 atomic_add_int(&sifa->refcount, 1);
2659 /* next try for an acceptable address on the ep */
2660 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2662 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2663 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2664 &sctp_ifa->address.sin.sin_addr) != 0)) {
2669 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2670 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2671 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2675 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2677 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2678 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2681 if (((non_asoc_addr_ok == 0) &&
2682 (sctp_is_addr_restricted(stcb, sifa))) ||
2683 (non_asoc_addr_ok &&
2684 (sctp_is_addr_restricted(stcb, sifa)) &&
2685 (!sctp_is_addr_pending(stcb, sifa)))) {
2686 /* on the no-no list */
2689 atomic_add_int(&sifa->refcount, 1);
2696 * if we can't find one like that then we must look at all addresses
2697 * bound to pick one at first preferable then secondly acceptable.
2699 starting_point = stcb->asoc.last_used_address;
2701 if (stcb->asoc.last_used_address == NULL) {
2702 start_at_beginning = 1;
2703 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2705 /* search beginning with the last used address */
2706 for (laddr = stcb->asoc.last_used_address; laddr;
2707 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2708 if (laddr->ifa == NULL) {
2709 /* address has been removed */
2712 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2713 /* address is being deleted */
2716 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2719 if (((non_asoc_addr_ok == 0) &&
2720 (sctp_is_addr_restricted(stcb, sifa))) ||
2721 (non_asoc_addr_ok &&
2722 (sctp_is_addr_restricted(stcb, sifa)) &&
2723 (!sctp_is_addr_pending(stcb, sifa)))) {
2724 /* on the no-no list */
2727 stcb->asoc.last_used_address = laddr;
2728 atomic_add_int(&sifa->refcount, 1);
2731 if (start_at_beginning == 0) {
2732 stcb->asoc.last_used_address = NULL;
2733 goto sctp_from_the_top;
2735 /* now try for any higher scope than the destination */
2736 stcb->asoc.last_used_address = starting_point;
2737 start_at_beginning = 0;
2739 if (stcb->asoc.last_used_address == NULL) {
2740 start_at_beginning = 1;
2741 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2743 /* search beginning with the last used address */
2744 for (laddr = stcb->asoc.last_used_address; laddr;
2745 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2746 if (laddr->ifa == NULL) {
2747 /* address has been removed */
2750 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2751 /* address is being deleted */
2754 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2758 if (((non_asoc_addr_ok == 0) &&
2759 (sctp_is_addr_restricted(stcb, sifa))) ||
2760 (non_asoc_addr_ok &&
2761 (sctp_is_addr_restricted(stcb, sifa)) &&
2762 (!sctp_is_addr_pending(stcb, sifa)))) {
2763 /* on the no-no list */
2766 stcb->asoc.last_used_address = laddr;
2767 atomic_add_int(&sifa->refcount, 1);
2770 if (start_at_beginning == 0) {
2771 stcb->asoc.last_used_address = NULL;
2772 goto sctp_from_the_top2;
2777 static struct sctp_ifa *
2778 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2779 struct sctp_inpcb *inp,
2780 struct sctp_tcb *stcb,
2781 int non_asoc_addr_ok,
2782 uint8_t dest_is_loop,
2783 uint8_t dest_is_priv,
2789 struct sctp_ifa *ifa, *sifa;
2790 int num_eligible_addr = 0;
2792 struct sockaddr_in6 sin6, lsa6;
2794 if (fam == AF_INET6) {
2795 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2796 (void)sa6_recoverscope(&sin6);
2799 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2801 if ((ifa->address.sa.sa_family == AF_INET) &&
2802 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2803 &ifa->address.sin.sin_addr) != 0)) {
2808 if ((ifa->address.sa.sa_family == AF_INET6) &&
2809 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2810 &ifa->address.sin6.sin6_addr) != 0)) {
2814 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2815 (non_asoc_addr_ok == 0))
2817 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2822 if (fam == AF_INET6 &&
2824 sifa->src_is_loop && sifa->src_is_priv) {
2826 * don't allow fe80::1 to be a src on loop ::1, we
2827 * don't list it to the peer so we will get an
2832 if (fam == AF_INET6 &&
2833 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2834 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2836 * link-local <-> link-local must belong to the same
2839 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2840 (void)sa6_recoverscope(&lsa6);
2841 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2848 * Check if the IPv6 address matches to next-hop. In the
2849 * mobile case, old IPv6 address may be not deleted from the
2850 * interface. Then, the interface has previous and new
2851 * addresses. We should use one corresponding to the
2852 * next-hop. (by micchie)
2855 if (stcb && fam == AF_INET6 &&
2856 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2857 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2864 /* Avoid topologically incorrect IPv4 address */
2865 if (stcb && fam == AF_INET &&
2866 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2867 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2873 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2876 if (((non_asoc_addr_ok == 0) &&
2877 (sctp_is_addr_restricted(stcb, sifa))) ||
2878 (non_asoc_addr_ok &&
2879 (sctp_is_addr_restricted(stcb, sifa)) &&
2880 (!sctp_is_addr_pending(stcb, sifa)))) {
2882 * It is restricted for some reason..
2883 * probably not yet added.
2888 if (num_eligible_addr >= addr_wanted) {
2891 num_eligible_addr++;
2898 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2899 struct sctp_inpcb *inp,
2900 struct sctp_tcb *stcb,
2901 int non_asoc_addr_ok,
2902 uint8_t dest_is_loop,
2903 uint8_t dest_is_priv,
2906 struct sctp_ifa *ifa, *sifa;
2907 int num_eligible_addr = 0;
2909 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2911 if ((ifa->address.sa.sa_family == AF_INET) &&
2912 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2913 &ifa->address.sin.sin_addr) != 0)) {
2918 if ((ifa->address.sa.sa_family == AF_INET6) &&
2920 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2921 &ifa->address.sin6.sin6_addr) != 0)) {
2925 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2926 (non_asoc_addr_ok == 0)) {
2929 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2935 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2938 if (((non_asoc_addr_ok == 0) &&
2939 (sctp_is_addr_restricted(stcb, sifa))) ||
2940 (non_asoc_addr_ok &&
2941 (sctp_is_addr_restricted(stcb, sifa)) &&
2942 (!sctp_is_addr_pending(stcb, sifa)))) {
2944 * It is restricted for some reason..
2945 * probably not yet added.
2950 num_eligible_addr++;
2952 return (num_eligible_addr);
2955 static struct sctp_ifa *
2956 sctp_choose_boundall(struct sctp_inpcb *inp,
2957 struct sctp_tcb *stcb,
2958 struct sctp_nets *net,
2961 uint8_t dest_is_priv,
2962 uint8_t dest_is_loop,
2963 int non_asoc_addr_ok,
2966 int cur_addr_num = 0, num_preferred = 0;
2968 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2969 struct sctp_ifa *sctp_ifa, *sifa;
2971 struct sctp_vrf *vrf;
2977 * For boundall we can use any address in the association.
2978 * If non_asoc_addr_ok is set we can use any address (at least in
2979 * theory). So we look for preferred addresses first. If we find one,
2980 * we use it. Otherwise we next try to get an address on the
2981 * interface, which we should be able to do (unless non_asoc_addr_ok
2982 * is false and we are routed out that way). In these cases where we
2983 * can't use the address of the interface we go through all the
2984 * ifn's looking for an address we can use and fill that in. Punting
2985 * means we send back address 0, which will probably cause problems
2986 * actually since then IP will fill in the address of the route ifn,
2987 * which means we probably already rejected it.. i.e. here comes an
2990 vrf = sctp_find_vrf(vrf_id);
2994 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2995 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2996 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2997 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2998 if (sctp_ifn == NULL) {
2999 /* ?? We don't have this guy ?? */
3000 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
3001 goto bound_all_plan_b;
3003 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3004 ifn_index, sctp_ifn->ifn_name);
3007 cur_addr_num = net->indx_of_eligible_next_to_use;
3009 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3014 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3015 num_preferred, sctp_ifn->ifn_name);
3016 if (num_preferred == 0) {
3018 * no eligible addresses, we must use some other interface
3019 * address if we can find one.
3021 goto bound_all_plan_b;
3024 * Ok we have num_eligible_addr set with how many we can use, this
3025 * may vary from call to call due to addresses being deprecated
3028 if (cur_addr_num >= num_preferred) {
3032 * select the nth address from the list (where cur_addr_num is the
3033 * nth) and 0 is the first one, 1 is the second one etc...
3035 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3037 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3038 dest_is_priv, cur_addr_num, fam, ro);
3040 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3042 atomic_add_int(&sctp_ifa->refcount, 1);
3044 /* save off where the next one we will want */
3045 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3050 * plan_b: Look at all interfaces and find a preferred address. If
3051 * no preferred fall through to plan_c.
3054 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3055 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3056 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3057 sctp_ifn->ifn_name);
3058 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3059 /* wrong base scope */
3060 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3063 if ((sctp_ifn == looked_at) && looked_at) {
3064 /* already looked at this guy */
3065 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3068 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3069 dest_is_loop, dest_is_priv, fam);
3070 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3071 "Found ifn:%p %d preferred source addresses\n",
3072 ifn, num_preferred);
3073 if (num_preferred == 0) {
3074 /* None on this interface. */
3075 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3078 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3079 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3080 num_preferred, (void *)sctp_ifn, cur_addr_num);
3083 * Ok we have num_eligible_addr set with how many we can
3084 * use, this may vary from call to call due to addresses
3085 * being deprecated etc..
3087 if (cur_addr_num >= num_preferred) {
3090 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3091 dest_is_priv, cur_addr_num, fam, ro);
3095 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3096 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3098 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3099 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3100 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3101 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3103 atomic_add_int(&sifa->refcount, 1);
3107 again_with_private_addresses_allowed:
3109 /* plan_c: do we have an acceptable address on the emit interface */
3111 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3112 if (emit_ifn == NULL) {
3113 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3116 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3117 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3119 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3120 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3121 &sctp_ifa->address.sin.sin_addr) != 0)) {
3122 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3127 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3128 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3129 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3130 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3134 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3135 (non_asoc_addr_ok == 0)) {
3136 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3139 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3142 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3146 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3147 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3151 if (((non_asoc_addr_ok == 0) &&
3152 (sctp_is_addr_restricted(stcb, sifa))) ||
3153 (non_asoc_addr_ok &&
3154 (sctp_is_addr_restricted(stcb, sifa)) &&
3155 (!sctp_is_addr_pending(stcb, sifa)))) {
3157 * It is restricted for some reason..
3158 * probably not yet added.
3160 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3165 atomic_add_int(&sifa->refcount, 1);
3170 * plan_d: We are in trouble. No preferred address on the emit
3171 * interface. And not even a preferred address on all interfaces. Go
3172 * out and see if we can find an acceptable address somewhere
3173 * amongst all interfaces.
3175 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3176 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3177 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3178 /* wrong base scope */
3181 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3183 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3184 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3185 &sctp_ifa->address.sin.sin_addr) != 0)) {
3190 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3191 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3192 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3196 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3197 (non_asoc_addr_ok == 0))
3199 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3205 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3209 if (((non_asoc_addr_ok == 0) &&
3210 (sctp_is_addr_restricted(stcb, sifa))) ||
3211 (non_asoc_addr_ok &&
3212 (sctp_is_addr_restricted(stcb, sifa)) &&
3213 (!sctp_is_addr_pending(stcb, sifa)))) {
3215 * It is restricted for some
3216 * reason.. probably not yet added.
3227 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3228 stcb->asoc.scope.ipv4_local_scope = 1;
3230 goto again_with_private_addresses_allowed;
3231 } else if (retried == 1) {
3232 stcb->asoc.scope.ipv4_local_scope = 0;
3240 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3241 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3242 /* wrong base scope */
3245 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3246 struct sctp_ifa *tmp_sifa;
3249 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3250 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3251 &sctp_ifa->address.sin.sin_addr) != 0)) {
3256 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3257 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3258 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3262 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3263 (non_asoc_addr_ok == 0))
3265 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3268 if (tmp_sifa == NULL) {
3271 if (tmp_sifa == sifa) {
3275 if (sctp_is_address_in_scope(tmp_sifa,
3276 &stcb->asoc.scope, 0) == 0) {
3279 if (((non_asoc_addr_ok == 0) &&
3280 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3281 (non_asoc_addr_ok &&
3282 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3283 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3293 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3294 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3295 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3300 atomic_add_int(&sifa->refcount, 1);
3308 /* tcb may be NULL */
3310 sctp_source_address_selection(struct sctp_inpcb *inp,
3311 struct sctp_tcb *stcb,
3313 struct sctp_nets *net,
3314 int non_asoc_addr_ok, uint32_t vrf_id)
3316 struct sctp_ifa *answer;
3317 uint8_t dest_is_priv, dest_is_loop;
3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3323 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3328 * - Find the route if needed, cache if I can.
3329 * - Look at interface address in route, Is it in the bound list. If so we
3330 * have the best source.
3331 * - If not we must rotate amongst the addresses.
3335 * Do we need to pay attention to scope. We can have a private address
3336 * or a global address we are sourcing or sending to. So if we draw
3338 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3340 * ------------------------------------------
3341 * source * dest * result
3342 * -----------------------------------------
3343 * <a> Private * Global * NAT
3344 * -----------------------------------------
3345 * <b> Private * Private * No problem
3346 * -----------------------------------------
3347 * <c> Global * Private * Huh, How will this work?
3348 * -----------------------------------------
3349 * <d> Global * Global * No Problem
3350 *------------------------------------------
3351 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3353 *------------------------------------------
3354 * source * dest * result
3355 * -----------------------------------------
3356 * <a> Linklocal * Global *
3357 * -----------------------------------------
3358 * <b> Linklocal * Linklocal * No problem
3359 * -----------------------------------------
3360 * <c> Global * Linklocal * Huh, How will this work?
3361 * -----------------------------------------
3362 * <d> Global * Global * No Problem
3363 *------------------------------------------
3364 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3366 * And then we add to that what happens if there are multiple addresses
3367 * assigned to an interface. Remember the ifa on a ifn is a linked
3368 * list of addresses. So one interface can have more than one IP
3369 * address. What happens if we have both a private and a global
3370 * address? Do we then use context of destination to sort out which
3371 * one is best? And what about NAT's sending P->G may get you a NAT
3372 * translation, or should you select the G thats on the interface in
3377 * - count the number of addresses on the interface.
3378 * - if it is one, no problem except case <c>.
3379 * For <a> we will assume a NAT out there.
3380 * - if there are more than one, then we need to worry about scope P
3381 * or G. We should prefer G -> G and P -> P if possible.
3382 * Then as a secondary fall back to mixed types G->P being a last
3384 * - The above all works for bound all, but bound specific we need to
3385 * use the same concept but instead only consider the bound
3386 * addresses. If the bound set is NOT assigned to the interface then
3387 * we must use rotation amongst the bound addresses..
3389 if (ro->ro_rt == NULL) {
3391 * Need a route to cache.
3393 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3395 if (ro->ro_rt == NULL) {
3398 fam = ro->ro_dst.sa_family;
3399 dest_is_priv = dest_is_loop = 0;
3400 /* Setup our scopes for the destination */
3404 /* Scope based on outbound address */
3405 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3408 /* mark it as local */
3409 net->addr_is_local = 1;
3411 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3418 /* Scope based on outbound address */
3419 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3420 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3422 * If the address is a loopback address, which
3423 * consists of "::1" OR "fe80::1%lo0", we are
3424 * loopback scope. But we don't use dest_is_priv
3425 * (link local addresses).
3429 /* mark it as local */
3430 net->addr_is_local = 1;
3432 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3438 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3439 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3440 SCTP_IPI_ADDR_RLOCK();
3441 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3445 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3446 dest_is_priv, dest_is_loop,
3447 non_asoc_addr_ok, fam);
3448 SCTP_IPI_ADDR_RUNLOCK();
3455 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3456 vrf_id, dest_is_priv,
3458 non_asoc_addr_ok, fam);
3460 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3465 SCTP_IPI_ADDR_RUNLOCK();
3470 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3473 struct sctp_sndinfo sndinfo;
3474 struct sctp_prinfo prinfo;
3475 struct sctp_authinfo authinfo;
3476 int tot_len, rem_len, cmsg_data_len, cmsg_data_off, off;
3480 * Independent of how many mbufs, find the c_type inside the control
3481 * structure and copy out the data.
3484 tot_len = SCTP_BUF_LEN(control);
3485 for (off = 0; off < tot_len; off += CMSG_ALIGN(cmh.cmsg_len)) {
3486 rem_len = tot_len - off;
3487 if (rem_len < (int)CMSG_ALIGN(sizeof(cmh))) {
3488 /* There is not enough room for one more. */
3491 m_copydata(control, off, sizeof(cmh), (caddr_t)&cmh);
3492 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3493 /* We dont't have a complete CMSG header. */
3496 if ((cmh.cmsg_len > INT_MAX) || ((int)cmh.cmsg_len > rem_len)) {
3497 /* We don't have the complete CMSG. */
3500 cmsg_data_len = (int)cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh));
3501 cmsg_data_off = off + CMSG_ALIGN(sizeof(cmh));
3502 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3503 ((c_type == cmh.cmsg_type) ||
3504 ((c_type == SCTP_SNDRCV) &&
3505 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3506 (cmh.cmsg_type == SCTP_PRINFO) ||
3507 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3508 if (c_type == cmh.cmsg_type) {
3509 if (cpsize > INT_MAX) {
3512 if (cmsg_data_len < (int)cpsize) {
3515 /* It is exactly what we want. Copy it out. */
3516 m_copydata(control, cmsg_data_off, (int)cpsize, (caddr_t)data);
3519 struct sctp_sndrcvinfo *sndrcvinfo;
3521 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3523 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3526 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3528 switch (cmh.cmsg_type) {
3530 if (cmsg_data_len < (int)sizeof(struct sctp_sndinfo)) {
3533 m_copydata(control, cmsg_data_off, sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3534 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3535 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3536 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3537 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3538 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3541 if (cmsg_data_len < (int)sizeof(struct sctp_prinfo)) {
3544 m_copydata(control, cmsg_data_off, sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3545 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3546 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3548 sndrcvinfo->sinfo_timetolive = 0;
3550 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3553 if (cmsg_data_len < (int)sizeof(struct sctp_authinfo)) {
3556 m_copydata(control, cmsg_data_off, sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3557 sndrcvinfo->sinfo_keynumber_valid = 1;
3558 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3571 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3575 struct sctp_initmsg initmsg;
3577 struct sockaddr_in sin;
3580 struct sockaddr_in6 sin6;
3583 tlen = SCTP_BUF_LEN(control);
3586 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3587 /* There is not enough room for one more. */
3591 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3592 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3593 /* We dont't have a complete CMSG header. */
3597 if (((int)cmh.cmsg_len + at) > tlen) {
3598 /* We don't have the complete CMSG. */
3602 if (cmh.cmsg_level == IPPROTO_SCTP) {
3603 switch (cmh.cmsg_type) {
3605 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3609 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3610 if (initmsg.sinit_max_attempts)
3611 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3612 if (initmsg.sinit_num_ostreams)
3613 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3614 if (initmsg.sinit_max_instreams)
3615 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3616 if (initmsg.sinit_max_init_timeo)
3617 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3618 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3619 struct sctp_stream_out *tmp_str;
3621 #if defined(SCTP_DETAILED_STR_STATS)
3625 /* Default is NOT correct */
3626 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3627 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3628 SCTP_TCB_UNLOCK(stcb);
3629 SCTP_MALLOC(tmp_str,
3630 struct sctp_stream_out *,
3631 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3633 SCTP_TCB_LOCK(stcb);
3634 if (tmp_str != NULL) {
3635 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3636 stcb->asoc.strmout = tmp_str;
3637 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3639 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3641 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3642 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3643 stcb->asoc.strmout[i].chunks_on_queues = 0;
3644 stcb->asoc.strmout[i].next_mid_ordered = 0;
3645 stcb->asoc.strmout[i].next_mid_unordered = 0;
3646 #if defined(SCTP_DETAILED_STR_STATS)
3647 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3648 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3649 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3652 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3653 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3655 stcb->asoc.strmout[i].sid = i;
3656 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3657 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3658 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3663 case SCTP_DSTADDRV4:
3664 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3668 memset(&sin, 0, sizeof(struct sockaddr_in));
3669 sin.sin_family = AF_INET;
3670 sin.sin_len = sizeof(struct sockaddr_in);
3671 sin.sin_port = stcb->rport;
3672 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3673 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3674 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3675 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3679 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3680 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3687 case SCTP_DSTADDRV6:
3688 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3692 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3693 sin6.sin6_family = AF_INET6;
3694 sin6.sin6_len = sizeof(struct sockaddr_in6);
3695 sin6.sin6_port = stcb->rport;
3696 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3697 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3698 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3703 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3704 in6_sin6_2_sin(&sin, &sin6);
3705 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3706 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3707 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3711 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3712 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3718 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3719 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3729 at += CMSG_ALIGN(cmh.cmsg_len);
3734 static struct sctp_tcb *
3735 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3737 struct mbuf *control,
3738 struct sctp_nets **net_p,
3743 struct sctp_tcb *stcb;
3744 struct sockaddr *addr;
3746 struct sockaddr_in sin;
3749 struct sockaddr_in6 sin6;
3752 tlen = SCTP_BUF_LEN(control);
3755 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3756 /* There is not enough room for one more. */
3760 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3761 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3762 /* We dont't have a complete CMSG header. */
3766 if (((int)cmh.cmsg_len + at) > tlen) {
3767 /* We don't have the complete CMSG. */
3771 if (cmh.cmsg_level == IPPROTO_SCTP) {
3772 switch (cmh.cmsg_type) {
3774 case SCTP_DSTADDRV4:
3775 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3779 memset(&sin, 0, sizeof(struct sockaddr_in));
3780 sin.sin_family = AF_INET;
3781 sin.sin_len = sizeof(struct sockaddr_in);
3782 sin.sin_port = port;
3783 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3784 addr = (struct sockaddr *)&sin;
3788 case SCTP_DSTADDRV6:
3789 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3793 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3794 sin6.sin6_family = AF_INET6;
3795 sin6.sin6_len = sizeof(struct sockaddr_in6);
3796 sin6.sin6_port = port;
3797 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3799 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3800 in6_sin6_2_sin(&sin, &sin6);
3801 addr = (struct sockaddr *)&sin;
3804 addr = (struct sockaddr *)&sin6;
3812 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3818 at += CMSG_ALIGN(cmh.cmsg_len);
3823 static struct mbuf *
3824 sctp_add_cookie(struct mbuf *init, int init_offset,
3825 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3827 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3828 struct sctp_state_cookie *stc;
3829 struct sctp_paramhdr *ph;
3834 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3835 sizeof(struct sctp_paramhdr)), 0,
3836 M_NOWAIT, 1, MT_DATA);
3840 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3841 if (copy_init == NULL) {
3845 #ifdef SCTP_MBUF_LOGGING
3846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3847 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3850 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3852 if (copy_initack == NULL) {
3854 sctp_m_freem(copy_init);
3857 #ifdef SCTP_MBUF_LOGGING
3858 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3859 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3862 /* easy side we just drop it on the end */
3863 ph = mtod(mret, struct sctp_paramhdr *);
3864 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3865 sizeof(struct sctp_paramhdr);
3866 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3867 sizeof(struct sctp_paramhdr));
3868 ph->param_type = htons(SCTP_STATE_COOKIE);
3869 ph->param_length = 0; /* fill in at the end */
3870 /* Fill in the stc cookie data */
3871 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3873 /* tack the INIT and then the INIT-ACK onto the chain */
3875 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3876 cookie_sz += SCTP_BUF_LEN(m_at);
3877 if (SCTP_BUF_NEXT(m_at) == NULL) {
3878 SCTP_BUF_NEXT(m_at) = copy_init;
3882 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3883 cookie_sz += SCTP_BUF_LEN(m_at);
3884 if (SCTP_BUF_NEXT(m_at) == NULL) {
3885 SCTP_BUF_NEXT(m_at) = copy_initack;
3889 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3890 cookie_sz += SCTP_BUF_LEN(m_at);
3891 if (SCTP_BUF_NEXT(m_at) == NULL) {
3895 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3897 /* no space, so free the entire chain */
3901 SCTP_BUF_LEN(sig) = 0;
3902 SCTP_BUF_NEXT(m_at) = sig;
3904 foo = (uint8_t *)(mtod(sig, caddr_t)+sig_offset);
3905 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3907 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3908 cookie_sz += SCTP_SIGNATURE_SIZE;
3909 ph->param_length = htons(cookie_sz);
3915 sctp_get_ect(struct sctp_tcb *stcb)
3917 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3918 return (SCTP_ECT0_BIT);
3924 #if defined(INET) || defined(INET6)
3926 sctp_handle_no_route(struct sctp_tcb *stcb,
3927 struct sctp_nets *net,
3930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3934 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3935 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3936 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3938 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3942 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3943 net->dest_state &= ~SCTP_ADDR_PF;
3947 if (net == stcb->asoc.primary_destination) {
3948 /* need a new primary */
3949 struct sctp_nets *alt;
3951 alt = sctp_find_alternate_net(stcb, net, 0);
3953 if (stcb->asoc.alternate) {
3954 sctp_free_remote_addr(stcb->asoc.alternate);
3956 stcb->asoc.alternate = alt;
3957 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3958 if (net->ro._s_addr) {
3959 sctp_free_ifa(net->ro._s_addr);
3960 net->ro._s_addr = NULL;
3962 net->src_addr_selected = 0;
3971 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3972 struct sctp_tcb *stcb, /* may be NULL */
3973 struct sctp_nets *net,
3974 struct sockaddr *to,
3976 uint32_t auth_offset,
3977 struct sctp_auth_chunk *auth,
3978 uint16_t auth_keyid,
3979 int nofragment_flag,
3986 union sctp_sockstore *over_addr,
3987 uint8_t mflowtype, uint32_t mflowid,
3988 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3989 int so_locked SCTP_UNUSED
3995 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3997 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3998 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3999 * - fill in the HMAC digest of any AUTH chunk in the packet.
4000 * - calculate and fill in the SCTP checksum.
4001 * - prepend an IP address header.
4002 * - if boundall use INADDR_ANY.
4003 * - if boundspecific do source address selection.
4004 * - set fragmentation option for ipV4.
4005 * - On return from IP output, check/adjust mtu size of output
4006 * interface and smallest_mtu size as well.
4008 /* Will need ifdefs around this */
4010 struct sctphdr *sctphdr;
4013 #if defined(INET) || defined(INET6)
4016 #if defined(INET) || defined(INET6)
4018 sctp_route_t *ro = NULL;
4019 struct udphdr *udp = NULL;
4022 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4023 struct socket *so = NULL;
4026 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4027 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4031 #if defined(INET) || defined(INET6)
4033 vrf_id = stcb->asoc.vrf_id;
4035 vrf_id = inp->def_vrf_id;
4038 /* fill in the HMAC digest for any AUTH chunk in the packet */
4039 if ((auth != NULL) && (stcb != NULL)) {
4040 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4044 tos_value = net->dscp;
4046 tos_value = stcb->asoc.default_dscp;
4048 tos_value = inp->sctp_ep.default_dscp;
4051 switch (to->sa_family) {
4055 struct ip *ip = NULL;
4056 sctp_route_t iproute;
4059 len = SCTP_MIN_V4_OVERHEAD;
4061 len += sizeof(struct udphdr);
4063 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4066 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4069 SCTP_ALIGN_TO_END(newm, len);
4070 SCTP_BUF_LEN(newm) = len;
4071 SCTP_BUF_NEXT(newm) = m;
4074 m->m_pkthdr.flowid = net->flowid;
4075 M_HASHTYPE_SET(m, net->flowtype);
4077 m->m_pkthdr.flowid = mflowid;
4078 M_HASHTYPE_SET(m, mflowtype);
4080 packet_length = sctp_calculate_len(m);
4081 ip = mtod(m, struct ip *);
4082 ip->ip_v = IPVERSION;
4083 ip->ip_hl = (sizeof(struct ip) >> 2);
4084 if (tos_value == 0) {
4086 * This means especially, that it is not set
4087 * at the SCTP layer. So use the value from
4090 tos_value = inp->ip_inp.inp.inp_ip_tos;
4094 tos_value |= sctp_get_ect(stcb);
4096 if ((nofragment_flag) && (port == 0)) {
4097 ip->ip_off = htons(IP_DF);
4099 ip->ip_off = htons(0);
4101 /* FreeBSD has a function for ip_id's */
4104 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4105 ip->ip_len = htons(packet_length);
4106 ip->ip_tos = tos_value;
4108 ip->ip_p = IPPROTO_UDP;
4110 ip->ip_p = IPPROTO_SCTP;
4115 memset(&iproute, 0, sizeof(iproute));
4116 memcpy(&ro->ro_dst, to, to->sa_len);
4118 ro = (sctp_route_t *)&net->ro;
4120 /* Now the address selection part */
4121 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4123 /* call the routine to select the src address */
4124 if (net && out_of_asoc_ok == 0) {
4125 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4126 sctp_free_ifa(net->ro._s_addr);
4127 net->ro._s_addr = NULL;
4128 net->src_addr_selected = 0;
4134 if (net->src_addr_selected == 0) {
4135 /* Cache the source address */
4136 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4139 net->src_addr_selected = 1;
4141 if (net->ro._s_addr == NULL) {
4142 /* No route to host */
4143 net->src_addr_selected = 0;
4144 sctp_handle_no_route(stcb, net, so_locked);
4145 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4147 return (EHOSTUNREACH);
4149 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4151 if (over_addr == NULL) {
4152 struct sctp_ifa *_lsrc;
4154 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4158 if (_lsrc == NULL) {
4159 sctp_handle_no_route(stcb, net, so_locked);
4160 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4162 return (EHOSTUNREACH);
4164 ip->ip_src = _lsrc->address.sin.sin_addr;
4165 sctp_free_ifa(_lsrc);
4167 ip->ip_src = over_addr->sin.sin_addr;
4168 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4172 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4173 sctp_handle_no_route(stcb, net, so_locked);
4174 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4176 return (EHOSTUNREACH);
4178 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4179 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4180 udp->uh_dport = port;
4181 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4183 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4187 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4189 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4192 sctphdr->src_port = src_port;
4193 sctphdr->dest_port = dest_port;
4194 sctphdr->v_tag = v_tag;
4195 sctphdr->checksum = 0;
4198 * If source address selection fails and we find no
4199 * route then the ip_output should fail as well with
4200 * a NO_ROUTE_TO_HOST type error. We probably should
4201 * catch that somewhere and abort the association
4202 * right away (assuming this is an INIT being sent).
4204 if (ro->ro_rt == NULL) {
4206 * src addr selection failed to find a route
4207 * (or valid source addr), so we can't get
4208 * there from here (yet)!
4210 sctp_handle_no_route(stcb, net, so_locked);
4211 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4213 return (EHOSTUNREACH);
4215 if (ro != &iproute) {
4216 memcpy(&iproute, ro, sizeof(*ro));
4218 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4219 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4220 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4221 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4222 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4225 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4226 /* failed to prepend data, give up */
4227 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4231 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4233 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4234 SCTP_STAT_INCR(sctps_sendswcrc);
4236 SCTP_ENABLE_UDP_CSUM(o_pak);
4239 m->m_pkthdr.csum_flags = CSUM_SCTP;
4240 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4241 SCTP_STAT_INCR(sctps_sendhwcrc);
4243 #ifdef SCTP_PACKET_LOGGING
4244 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4245 sctp_packet_log(o_pak);
4247 /* send it out. table id is taken from stcb */
4248 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4249 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4250 so = SCTP_INP_SO(inp);
4251 SCTP_SOCKET_UNLOCK(so, 0);
4254 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4255 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4256 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4257 atomic_add_int(&stcb->asoc.refcnt, 1);
4258 SCTP_TCB_UNLOCK(stcb);
4259 SCTP_SOCKET_LOCK(so, 0);
4260 SCTP_TCB_LOCK(stcb);
4261 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4264 SCTP_STAT_INCR(sctps_sendpackets);
4265 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4267 SCTP_STAT_INCR(sctps_senderrors);
4269 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4271 /* free tempy routes */
4274 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4275 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4278 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4281 mtu -= sizeof(struct udphdr);
4283 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4284 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4288 } else if (ro->ro_rt == NULL) {
4289 /* route was freed */
4290 if (net->ro._s_addr &&
4291 net->src_addr_selected) {
4292 sctp_free_ifa(net->ro._s_addr);
4293 net->ro._s_addr = NULL;
4295 net->src_addr_selected = 0;
4304 uint32_t flowlabel, flowinfo;
4305 struct ip6_hdr *ip6h;
4306 struct route_in6 ip6route;
4308 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4310 struct sockaddr_in6 lsa6_storage;
4312 u_short prev_port = 0;
4316 flowlabel = net->flowlabel;
4318 flowlabel = stcb->asoc.default_flowlabel;
4320 flowlabel = inp->sctp_ep.default_flowlabel;
4322 if (flowlabel == 0) {
4324 * This means especially, that it is not set
4325 * at the SCTP layer. So use the value from
4328 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4330 flowlabel &= 0x000fffff;
4331 len = SCTP_MIN_OVERHEAD;
4333 len += sizeof(struct udphdr);
4335 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4338 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4341 SCTP_ALIGN_TO_END(newm, len);
4342 SCTP_BUF_LEN(newm) = len;
4343 SCTP_BUF_NEXT(newm) = m;
4346 m->m_pkthdr.flowid = net->flowid;
4347 M_HASHTYPE_SET(m, net->flowtype);
4349 m->m_pkthdr.flowid = mflowid;
4350 M_HASHTYPE_SET(m, mflowtype);
4352 packet_length = sctp_calculate_len(m);
4354 ip6h = mtod(m, struct ip6_hdr *);
4355 /* protect *sin6 from overwrite */
4356 sin6 = (struct sockaddr_in6 *)to;
4360 /* KAME hack: embed scopeid */
4361 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4362 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4366 memset(&ip6route, 0, sizeof(ip6route));
4367 ro = (sctp_route_t *)&ip6route;
4368 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4370 ro = (sctp_route_t *)&net->ro;
4373 * We assume here that inp_flow is in host byte
4374 * order within the TCB!
4376 if (tos_value == 0) {
4378 * This means especially, that it is not set
4379 * at the SCTP layer. So use the value from
4382 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4386 tos_value |= sctp_get_ect(stcb);
4390 flowinfo |= tos_value;
4392 flowinfo |= flowlabel;
4393 ip6h->ip6_flow = htonl(flowinfo);
4395 ip6h->ip6_nxt = IPPROTO_UDP;
4397 ip6h->ip6_nxt = IPPROTO_SCTP;
4399 ip6h->ip6_plen = htons(packet_length - sizeof(struct ip6_hdr));
4400 ip6h->ip6_dst = sin6->sin6_addr;
4403 * Add SRC address selection here: we can only reuse
4404 * to a limited degree the kame src-addr-sel, since
4405 * we can try their selection but it may not be
4408 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4409 lsa6_tmp.sin6_family = AF_INET6;
4410 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4412 if (net && out_of_asoc_ok == 0) {
4413 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4414 sctp_free_ifa(net->ro._s_addr);
4415 net->ro._s_addr = NULL;
4416 net->src_addr_selected = 0;
4422 if (net->src_addr_selected == 0) {
4423 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4424 /* KAME hack: embed scopeid */
4425 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4426 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4429 /* Cache the source address */
4430 net->ro._s_addr = sctp_source_address_selection(inp,
4436 (void)sa6_recoverscope(sin6);
4437 net->src_addr_selected = 1;
4439 if (net->ro._s_addr == NULL) {
4440 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4441 net->src_addr_selected = 0;
4442 sctp_handle_no_route(stcb, net, so_locked);
4443 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4445 return (EHOSTUNREACH);
4447 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4449 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4450 /* KAME hack: embed scopeid */
4451 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4452 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4455 if (over_addr == NULL) {
4456 struct sctp_ifa *_lsrc;
4458 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4462 if (_lsrc == NULL) {
4463 sctp_handle_no_route(stcb, net, so_locked);
4464 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4466 return (EHOSTUNREACH);
4468 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4469 sctp_free_ifa(_lsrc);
4471 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4472 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4474 (void)sa6_recoverscope(sin6);
4476 lsa6->sin6_port = inp->sctp_lport;
4478 if (ro->ro_rt == NULL) {
4480 * src addr selection failed to find a route
4481 * (or valid source addr), so we can't get
4484 sctp_handle_no_route(stcb, net, so_locked);
4485 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4487 return (EHOSTUNREACH);
4490 * XXX: sa6 may not have a valid sin6_scope_id in
4491 * the non-SCOPEDROUTING case.
4493 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4494 lsa6_storage.sin6_family = AF_INET6;
4495 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4496 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4497 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4498 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4503 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4504 lsa6_storage.sin6_port = inp->sctp_lport;
4505 lsa6 = &lsa6_storage;
4506 ip6h->ip6_src = lsa6->sin6_addr;
4509 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4510 sctp_handle_no_route(stcb, net, so_locked);
4511 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4513 return (EHOSTUNREACH);
4515 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4516 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4517 udp->uh_dport = port;
4518 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4520 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4522 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4525 sctphdr->src_port = src_port;
4526 sctphdr->dest_port = dest_port;
4527 sctphdr->v_tag = v_tag;
4528 sctphdr->checksum = 0;
4531 * We set the hop limit now since there is a good
4532 * chance that our ro pointer is now filled
4534 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4535 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4538 /* Copy to be sure something bad is not happening */
4539 sin6->sin6_addr = ip6h->ip6_dst;
4540 lsa6->sin6_addr = ip6h->ip6_src;
4543 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4544 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4545 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4546 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4547 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4549 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4551 * preserve the port and scope for link
4554 prev_scope = sin6->sin6_scope_id;
4555 prev_port = sin6->sin6_port;
4558 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4559 /* failed to prepend data, give up */
4561 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4564 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4566 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4567 SCTP_STAT_INCR(sctps_sendswcrc);
4568 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4569 udp->uh_sum = 0xffff;
4572 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4573 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4574 SCTP_STAT_INCR(sctps_sendhwcrc);
4576 /* send it out. table id is taken from stcb */
4577 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4578 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4579 so = SCTP_INP_SO(inp);
4580 SCTP_SOCKET_UNLOCK(so, 0);
4583 #ifdef SCTP_PACKET_LOGGING
4584 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4585 sctp_packet_log(o_pak);
4587 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4588 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4589 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4590 atomic_add_int(&stcb->asoc.refcnt, 1);
4591 SCTP_TCB_UNLOCK(stcb);
4592 SCTP_SOCKET_LOCK(so, 0);
4593 SCTP_TCB_LOCK(stcb);
4594 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4598 /* for link local this must be done */
4599 sin6->sin6_scope_id = prev_scope;
4600 sin6->sin6_port = prev_port;
4602 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4603 SCTP_STAT_INCR(sctps_sendpackets);
4604 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4606 SCTP_STAT_INCR(sctps_senderrors);
4609 /* Now if we had a temp route free it */
4613 * PMTU check versus smallest asoc MTU goes
4616 if (ro->ro_rt == NULL) {
4617 /* Route was freed */
4618 if (net->ro._s_addr &&
4619 net->src_addr_selected) {
4620 sctp_free_ifa(net->ro._s_addr);
4621 net->ro._s_addr = NULL;
4623 net->src_addr_selected = 0;
4625 if ((ro->ro_rt != NULL) && (net->ro._s_addr) &&
4626 ((net->dest_state & SCTP_ADDR_NO_PMTUD) == 0)) {
4629 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4632 mtu -= sizeof(struct udphdr);
4634 if ((stcb != NULL) && (stcb->asoc.smallest_mtu > mtu)) {
4635 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4640 if (ND_IFINFO(ifp)->linkmtu &&
4641 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4642 sctp_mtu_size_reset(inp,
4644 ND_IFINFO(ifp)->linkmtu);
4652 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4653 ((struct sockaddr *)to)->sa_family);
4655 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4662 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4663 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4668 struct mbuf *m, *m_last;
4669 struct sctp_nets *net;
4670 struct sctp_init_chunk *init;
4671 struct sctp_supported_addr_param *sup_addr;
4672 struct sctp_adaptation_layer_indication *ali;
4673 struct sctp_supported_chunk_types_param *pr_supported;
4674 struct sctp_paramhdr *ph;
4675 int cnt_inits_to = 0;
4677 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4679 /* INIT's always go to the primary (and usually ONLY address) */
4680 net = stcb->asoc.primary_destination;
4682 net = TAILQ_FIRST(&stcb->asoc.nets);
4687 /* we confirm any address we send an INIT to */
4688 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4689 (void)sctp_set_primary_addr(stcb, NULL, net);
4691 /* we confirm any address we send an INIT to */
4692 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4694 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4696 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4698 * special hook, if we are sending to link local it will not
4699 * show up in our private address count.
4701 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4705 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4706 /* This case should not happen */
4707 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4710 /* start the INIT timer */
4711 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4713 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4715 /* No memory, INIT timer will re-attempt. */
4716 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4719 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4721 /* Now lets put the chunk header in place */
4722 init = mtod(m, struct sctp_init_chunk *);
4723 /* now the chunk header */
4724 init->ch.chunk_type = SCTP_INITIATION;
4725 init->ch.chunk_flags = 0;
4726 /* fill in later from mbuf we build */
4727 init->ch.chunk_length = 0;
4728 /* place in my tag */
4729 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4730 /* set up some of the credits. */
4731 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4732 SCTP_MINIMAL_RWND));
4733 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4734 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4735 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4737 /* Adaptation layer indication parameter */
4738 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4739 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4740 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4741 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4742 ali->ph.param_length = htons(parameter_len);
4743 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4744 chunk_len += parameter_len;
4748 if (stcb->asoc.ecn_supported == 1) {
4749 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4750 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4751 ph->param_type = htons(SCTP_ECN_CAPABLE);
4752 ph->param_length = htons(parameter_len);
4753 chunk_len += parameter_len;
4756 /* PR-SCTP supported parameter */
4757 if (stcb->asoc.prsctp_supported == 1) {
4758 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4759 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4760 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4761 ph->param_length = htons(parameter_len);
4762 chunk_len += parameter_len;
4765 /* Add NAT friendly parameter. */
4766 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4767 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4768 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4769 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4770 ph->param_length = htons(parameter_len);
4771 chunk_len += parameter_len;
4774 /* And now tell the peer which extensions we support */
4776 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4777 if (stcb->asoc.prsctp_supported == 1) {
4778 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4779 if (stcb->asoc.idata_supported) {
4780 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4783 if (stcb->asoc.auth_supported == 1) {
4784 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4786 if (stcb->asoc.asconf_supported == 1) {
4787 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4788 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4790 if (stcb->asoc.reconfig_supported == 1) {
4791 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4793 if (stcb->asoc.idata_supported) {
4794 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4796 if (stcb->asoc.nrsack_supported == 1) {
4797 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4799 if (stcb->asoc.pktdrop_supported == 1) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4803 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4804 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4805 pr_supported->ph.param_length = htons(parameter_len);
4806 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4807 chunk_len += parameter_len;
4809 /* add authentication parameters */
4810 if (stcb->asoc.auth_supported) {
4811 /* attach RANDOM parameter, if available */
4812 if (stcb->asoc.authinfo.random != NULL) {
4813 struct sctp_auth_random *randp;
4815 if (padding_len > 0) {
4816 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4817 chunk_len += padding_len;
4820 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4821 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4822 /* random key already contains the header */
4823 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4824 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4825 chunk_len += parameter_len;
4827 /* add HMAC_ALGO parameter */
4828 if (stcb->asoc.local_hmacs != NULL) {
4829 struct sctp_auth_hmac_algo *hmacs;
4831 if (padding_len > 0) {
4832 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4833 chunk_len += padding_len;
4836 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4837 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4838 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4839 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4840 hmacs->ph.param_length = htons(parameter_len);
4841 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4842 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4843 chunk_len += parameter_len;
4845 /* add CHUNKS parameter */
4846 if (stcb->asoc.local_auth_chunks != NULL) {
4847 struct sctp_auth_chunk_list *chunks;
4849 if (padding_len > 0) {
4850 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4851 chunk_len += padding_len;
4854 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4855 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4856 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4857 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4858 chunks->ph.param_length = htons(parameter_len);
4859 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4860 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4861 chunk_len += parameter_len;
4865 /* now any cookie time extensions */
4866 if (stcb->asoc.cookie_preserve_req) {
4867 struct sctp_cookie_perserve_param *cookie_preserve;
4869 if (padding_len > 0) {
4870 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4871 chunk_len += padding_len;
4874 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4875 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4876 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4877 cookie_preserve->ph.param_length = htons(parameter_len);
4878 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4879 stcb->asoc.cookie_preserve_req = 0;
4880 chunk_len += parameter_len;
4883 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4886 if (padding_len > 0) {
4887 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4888 chunk_len += padding_len;
4891 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4892 if (stcb->asoc.scope.ipv4_addr_legal) {
4893 parameter_len += (uint16_t)sizeof(uint16_t);
4895 if (stcb->asoc.scope.ipv6_addr_legal) {
4896 parameter_len += (uint16_t)sizeof(uint16_t);
4898 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4899 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4900 sup_addr->ph.param_length = htons(parameter_len);
4902 if (stcb->asoc.scope.ipv4_addr_legal) {
4903 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4905 if (stcb->asoc.scope.ipv6_addr_legal) {
4906 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4908 padding_len = 4 - 2 * i;
4909 chunk_len += parameter_len;
4912 SCTP_BUF_LEN(m) = chunk_len;
4913 /* now the addresses */
4915 * To optimize this we could put the scoping stuff into a structure
4916 * and remove the individual uint8's from the assoc structure. Then
4917 * we could just sifa in the address within the stcb. But for now
4918 * this is a quick hack to get the address stuff teased apart.
4920 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4922 &padding_len, &chunk_len);
4924 init->ch.chunk_length = htons(chunk_len);
4925 if (padding_len > 0) {
4926 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4931 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4932 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4933 (struct sockaddr *)&net->ro._l_addr,
4934 m, 0, NULL, 0, 0, 0, 0,
4935 inp->sctp_lport, stcb->rport, htonl(0),
4939 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4940 if (error == ENOBUFS) {
4941 stcb->asoc.ifp_had_enobuf = 1;
4942 SCTP_STAT_INCR(sctps_lowlevelerr);
4945 stcb->asoc.ifp_had_enobuf = 0;
4947 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4948 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4952 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4953 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4956 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4957 * being equal to the beginning of the params i.e. (iphlen +
4958 * sizeof(struct sctp_init_msg) parse through the parameters to the
4959 * end of the mbuf verifying that all parameters are known.
4961 * For unknown parameters build and return a mbuf with
4962 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4963 * processing this chunk stop, and set *abort_processing to 1.
4965 * By having param_offset be pre-set to where parameters begin it is
4966 * hoped that this routine may be reused in the future by new
4969 struct sctp_paramhdr *phdr, params;
4971 struct mbuf *mat, *op_err;
4972 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4973 int at, limit, pad_needed;
4974 uint16_t ptype, plen, padded_size;
4977 *abort_processing = 0;
4980 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4983 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4984 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4985 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4986 ptype = ntohs(phdr->param_type);
4987 plen = ntohs(phdr->param_length);
4988 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4989 /* wacked parameter */
4990 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4993 limit -= SCTP_SIZE32(plen);
4995 * All parameters for all chunks that we know/understand are
4996 * listed here. We process them other places and make
4997 * appropriate stop actions per the upper bits. However this
4998 * is the generic routine processor's can call to get back
4999 * an operr.. to either incorporate (init-ack) or send.
5001 padded_size = SCTP_SIZE32(plen);
5003 /* Param's with variable size */
5004 case SCTP_HEARTBEAT_INFO:
5005 case SCTP_STATE_COOKIE:
5006 case SCTP_UNRECOG_PARAM:
5007 case SCTP_ERROR_CAUSE_IND:
5011 /* Param's with variable size within a range */
5012 case SCTP_CHUNK_LIST:
5013 case SCTP_SUPPORTED_CHUNK_EXT:
5014 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5015 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5020 case SCTP_SUPPORTED_ADDRTYPE:
5021 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5022 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5028 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5029 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5034 case SCTP_SET_PRIM_ADDR:
5035 case SCTP_DEL_IP_ADDRESS:
5036 case SCTP_ADD_IP_ADDRESS:
5037 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5038 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5039 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5044 /* Param's with a fixed size */
5045 case SCTP_IPV4_ADDRESS:
5046 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5047 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5052 case SCTP_IPV6_ADDRESS:
5053 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5054 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5059 case SCTP_COOKIE_PRESERVE:
5060 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5061 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5066 case SCTP_HAS_NAT_SUPPORT:
5069 case SCTP_PRSCTP_SUPPORTED:
5070 if (padded_size != sizeof(struct sctp_paramhdr)) {
5071 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5076 case SCTP_ECN_CAPABLE:
5077 if (padded_size != sizeof(struct sctp_paramhdr)) {
5078 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5083 case SCTP_ULP_ADAPTATION:
5084 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5085 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5090 case SCTP_SUCCESS_REPORT:
5091 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5092 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5097 case SCTP_HOSTNAME_ADDRESS:
5099 /* We can NOT handle HOST NAME addresses!! */
5102 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5103 *abort_processing = 1;
5104 if (op_err == NULL) {
5105 /* Ok need to try to get a mbuf */
5107 l_len = SCTP_MIN_OVERHEAD;
5109 l_len = SCTP_MIN_V4_OVERHEAD;
5111 l_len += sizeof(struct sctp_chunkhdr);
5113 l_len += sizeof(struct sctp_paramhdr);
5114 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5116 SCTP_BUF_LEN(op_err) = 0;
5118 * pre-reserve space for ip
5119 * and sctp header and
5123 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5125 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5132 /* If we have space */
5133 struct sctp_paramhdr s;
5136 uint32_t cpthis = 0;
5138 pad_needed = 4 - (err_at % 4);
5139 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5140 err_at += pad_needed;
5142 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5143 s.param_length = htons(sizeof(s) + plen);
5144 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5145 err_at += sizeof(s);
5146 if (plen > sizeof(tempbuf)) {
5147 plen = sizeof(tempbuf);
5149 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5151 sctp_m_freem(op_err);
5153 * we are out of memory but
5154 * we still need to have a
5155 * look at what to do (the
5156 * system is in trouble
5161 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5168 * we do not recognize the parameter figure out what
5171 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5172 if ((ptype & 0x4000) == 0x4000) {
5173 /* Report bit is set?? */
5174 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5175 if (op_err == NULL) {
5178 /* Ok need to try to get an mbuf */
5180 l_len = SCTP_MIN_OVERHEAD;
5182 l_len = SCTP_MIN_V4_OVERHEAD;
5184 l_len += sizeof(struct sctp_chunkhdr);
5186 l_len += sizeof(struct sctp_paramhdr);
5187 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5189 SCTP_BUF_LEN(op_err) = 0;
5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5195 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5200 /* If we have space */
5201 struct sctp_paramhdr s;
5204 uint32_t cpthis = 0;
5206 pad_needed = 4 - (err_at % 4);
5207 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5208 err_at += pad_needed;
5210 s.param_type = htons(SCTP_UNRECOG_PARAM);
5211 s.param_length = htons(sizeof(s) + plen);
5212 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5213 err_at += sizeof(s);
5214 if (plen > sizeof(tempbuf)) {
5215 plen = sizeof(tempbuf);
5217 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5219 sctp_m_freem(op_err);
5221 * we are out of memory but
5222 * we still need to have a
5223 * look at what to do (the
5224 * system is in trouble
5228 goto more_processing;
5230 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5235 if ((ptype & 0x8000) == 0x0000) {
5236 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5239 /* skip this chunk and continue processing */
5240 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5241 at += SCTP_SIZE32(plen);
5246 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5250 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5251 *abort_processing = 1;
5252 if ((op_err == NULL) && phdr) {
5255 l_len = SCTP_MIN_OVERHEAD;
5257 l_len = SCTP_MIN_V4_OVERHEAD;
5259 l_len += sizeof(struct sctp_chunkhdr);
5260 l_len += (2 * sizeof(struct sctp_paramhdr));
5261 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5263 SCTP_BUF_LEN(op_err) = 0;
5265 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5270 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5273 if ((op_err) && phdr) {
5274 struct sctp_paramhdr s;
5277 uint32_t cpthis = 0;
5279 pad_needed = 4 - (err_at % 4);
5280 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5281 err_at += pad_needed;
5283 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5284 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5285 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5286 err_at += sizeof(s);
5287 /* Only copy back the p-hdr that caused the issue */
5288 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5294 sctp_are_there_new_addresses(struct sctp_association *asoc,
5295 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5298 * Given a INIT packet, look through the packet to verify that there
5299 * are NO new addresses. As we go through the parameters add reports
5300 * of any un-understood parameters that require an error. Also we
5301 * must return (1) to drop the packet if we see a un-understood
5302 * parameter that tells us to drop the chunk.
5304 struct sockaddr *sa_touse;
5305 struct sockaddr *sa;
5306 struct sctp_paramhdr *phdr, params;
5307 uint16_t ptype, plen;
5309 struct sctp_nets *net;
5312 struct sockaddr_in sin4, *sa4;
5315 struct sockaddr_in6 sin6, *sa6;
5319 memset(&sin4, 0, sizeof(sin4));
5320 sin4.sin_family = AF_INET;
5321 sin4.sin_len = sizeof(sin4);
5324 memset(&sin6, 0, sizeof(sin6));
5325 sin6.sin6_family = AF_INET6;
5326 sin6.sin6_len = sizeof(sin6);
5328 /* First what about the src address of the pkt ? */
5330 switch (src->sa_family) {
5333 if (asoc->scope.ipv4_addr_legal) {
5340 if (asoc->scope.ipv6_addr_legal) {
5351 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5352 sa = (struct sockaddr *)&net->ro._l_addr;
5353 if (sa->sa_family == src->sa_family) {
5355 if (sa->sa_family == AF_INET) {
5356 struct sockaddr_in *src4;
5358 sa4 = (struct sockaddr_in *)sa;
5359 src4 = (struct sockaddr_in *)src;
5360 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5367 if (sa->sa_family == AF_INET6) {
5368 struct sockaddr_in6 *src6;
5370 sa6 = (struct sockaddr_in6 *)sa;
5371 src6 = (struct sockaddr_in6 *)src;
5372 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5381 /* New address added! no need to look further. */
5385 /* Ok so far lets munge through the rest of the packet */
5386 offset += sizeof(struct sctp_init_chunk);
5387 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5390 ptype = ntohs(phdr->param_type);
5391 plen = ntohs(phdr->param_length);
5394 case SCTP_IPV4_ADDRESS:
5396 struct sctp_ipv4addr_param *p4, p4_buf;
5398 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5401 phdr = sctp_get_next_param(in_initpkt, offset,
5402 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5406 if (asoc->scope.ipv4_addr_legal) {
5407 p4 = (struct sctp_ipv4addr_param *)phdr;
5408 sin4.sin_addr.s_addr = p4->addr;
5409 sa_touse = (struct sockaddr *)&sin4;
5415 case SCTP_IPV6_ADDRESS:
5417 struct sctp_ipv6addr_param *p6, p6_buf;
5419 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5422 phdr = sctp_get_next_param(in_initpkt, offset,
5423 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5427 if (asoc->scope.ipv6_addr_legal) {
5428 p6 = (struct sctp_ipv6addr_param *)phdr;
5429 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5431 sa_touse = (struct sockaddr *)&sin6;
5441 /* ok, sa_touse points to one to check */
5443 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5444 sa = (struct sockaddr *)&net->ro._l_addr;
5445 if (sa->sa_family != sa_touse->sa_family) {
5449 if (sa->sa_family == AF_INET) {
5450 sa4 = (struct sockaddr_in *)sa;
5451 if (sa4->sin_addr.s_addr ==
5452 sin4.sin_addr.s_addr) {
5459 if (sa->sa_family == AF_INET6) {
5460 sa6 = (struct sockaddr_in6 *)sa;
5461 if (SCTP6_ARE_ADDR_EQUAL(
5470 /* New addr added! no need to look further */
5474 offset += SCTP_SIZE32(plen);
5475 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5481 * Given a MBUF chain that was sent into us containing an INIT. Build a
5482 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5483 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5484 * message (i.e. the struct sctp_init_msg).
5487 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5488 struct sctp_nets *src_net, struct mbuf *init_pkt,
5489 int iphlen, int offset,
5490 struct sockaddr *src, struct sockaddr *dst,
5491 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5492 uint8_t mflowtype, uint32_t mflowid,
5493 uint32_t vrf_id, uint16_t port)
5495 struct sctp_association *asoc;
5496 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5497 struct sctp_init_ack_chunk *initack;
5498 struct sctp_adaptation_layer_indication *ali;
5499 struct sctp_supported_chunk_types_param *pr_supported;
5500 struct sctp_paramhdr *ph;
5501 union sctp_sockstore *over_addr;
5502 struct sctp_scoping scp;
5505 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5506 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5507 struct sockaddr_in *sin;
5510 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5511 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5512 struct sockaddr_in6 *sin6;
5514 struct sockaddr *to;
5515 struct sctp_state_cookie stc;
5516 struct sctp_nets *net = NULL;
5517 uint8_t *signature = NULL;
5518 int cnt_inits_to = 0;
5519 uint16_t his_limit, i_want;
5521 int nat_friendly = 0;
5524 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5531 if ((asoc != NULL) &&
5532 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5533 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5535 * new addresses, out of here in non-cookie-wait
5538 * Send an ABORT, without the new address error
5539 * cause. This looks no different than if no
5540 * listener was present.
5542 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5544 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5545 mflowtype, mflowid, inp->fibnum,
5549 if (src_net != NULL && (src_net->port != port)) {
5551 * change of remote encapsulation port, out of here
5552 * in non-cookie-wait states
5554 * Send an ABORT, without an specific error cause.
5555 * This looks no different than if no listener was
5558 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5559 "Remote encapsulation port changed");
5560 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5561 mflowtype, mflowid, inp->fibnum,
5567 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5568 (offset + sizeof(struct sctp_init_chunk)),
5569 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5572 if (op_err == NULL) {
5573 char msg[SCTP_DIAG_INFO_LEN];
5575 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5576 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5579 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5580 init_chk->init.initiate_tag, op_err,
5581 mflowtype, mflowid, inp->fibnum,
5585 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5587 /* No memory, INIT timer will re-attempt. */
5589 sctp_m_freem(op_err);
5592 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5596 * We might not overwrite the identification[] completely and on
5597 * some platforms time_entered will contain some padding. Therefore
5598 * zero out the cookie to avoid putting uninitialized memory on the
5601 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5603 /* the time I built cookie */
5604 (void)SCTP_GETTIME_TIMEVAL(&now);
5605 stc.time_entered.tv_sec = now.tv_sec;
5606 stc.time_entered.tv_usec = now.tv_usec;
5608 /* populate any tie tags */
5610 /* unlock before tag selections */
5611 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5612 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5613 stc.cookie_life = asoc->cookie_life;
5614 net = asoc->primary_destination;
5616 stc.tie_tag_my_vtag = 0;
5617 stc.tie_tag_peer_vtag = 0;
5618 /* life I will award this cookie */
5619 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5622 /* copy in the ports for later check */
5623 stc.myport = sh->dest_port;
5624 stc.peerport = sh->src_port;
5627 * If we wanted to honor cookie life extensions, we would add to
5628 * stc.cookie_life. For now we should NOT honor any extension
5630 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5631 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5632 stc.ipv6_addr_legal = 1;
5633 if (SCTP_IPV6_V6ONLY(inp)) {
5634 stc.ipv4_addr_legal = 0;
5636 stc.ipv4_addr_legal = 1;
5639 stc.ipv6_addr_legal = 0;
5640 stc.ipv4_addr_legal = 1;
5645 switch (dst->sa_family) {
5649 /* lookup address */
5650 stc.address[0] = src4->sin_addr.s_addr;
5654 stc.addr_type = SCTP_IPV4_ADDRESS;
5655 /* local from address */
5656 stc.laddress[0] = dst4->sin_addr.s_addr;
5657 stc.laddress[1] = 0;
5658 stc.laddress[2] = 0;
5659 stc.laddress[3] = 0;
5660 stc.laddr_type = SCTP_IPV4_ADDRESS;
5661 /* scope_id is only for v6 */
5663 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5664 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5667 /* Must use the address in this case */
5668 if (sctp_is_address_on_local_host(src, vrf_id)) {
5669 stc.loopback_scope = 1;
5672 stc.local_scope = 0;
5680 stc.addr_type = SCTP_IPV6_ADDRESS;
5681 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5682 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5683 if (sctp_is_address_on_local_host(src, vrf_id)) {
5684 stc.loopback_scope = 1;
5685 stc.local_scope = 0;
5688 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5689 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5691 * If the new destination or source
5692 * is a LINK_LOCAL we must have
5693 * common both site and local scope.
5694 * Don't set local scope though
5695 * since we must depend on the
5696 * source to be added implicitly. We
5697 * cannot assure just because we
5698 * share one link that all links are
5701 stc.local_scope = 0;
5705 * we start counting for the private
5706 * address stuff at 1. since the
5707 * link local we source from won't
5708 * show up in our scoped count.
5712 * pull out the scope_id from
5715 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5716 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5718 * If the new destination or source
5719 * is SITE_LOCAL then we must have
5720 * site scope in common.
5724 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5725 stc.laddr_type = SCTP_IPV6_ADDRESS;
5735 /* set the scope per the existing tcb */
5738 struct sctp_nets *lnet;
5741 stc.loopback_scope = asoc->scope.loopback_scope;
5742 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5743 stc.site_scope = asoc->scope.site_scope;
5744 stc.local_scope = asoc->scope.local_scope;
5746 /* Why do we not consider IPv4 LL addresses? */
5747 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5748 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5749 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5751 * if we have a LL address, start
5759 /* use the net pointer */
5760 to = (struct sockaddr *)&net->ro._l_addr;
5761 switch (to->sa_family) {
5764 sin = (struct sockaddr_in *)to;
5765 stc.address[0] = sin->sin_addr.s_addr;
5769 stc.addr_type = SCTP_IPV4_ADDRESS;
5770 if (net->src_addr_selected == 0) {
5772 * strange case here, the INIT should have
5773 * did the selection.
5775 net->ro._s_addr = sctp_source_address_selection(inp,
5776 stcb, (sctp_route_t *)&net->ro,
5778 if (net->ro._s_addr == NULL)
5781 net->src_addr_selected = 1;
5784 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5785 stc.laddress[1] = 0;
5786 stc.laddress[2] = 0;
5787 stc.laddress[3] = 0;
5788 stc.laddr_type = SCTP_IPV4_ADDRESS;
5789 /* scope_id is only for v6 */
5795 sin6 = (struct sockaddr_in6 *)to;
5796 memcpy(&stc.address, &sin6->sin6_addr,
5797 sizeof(struct in6_addr));
5798 stc.addr_type = SCTP_IPV6_ADDRESS;
5799 stc.scope_id = sin6->sin6_scope_id;
5800 if (net->src_addr_selected == 0) {
5802 * strange case here, the INIT should have
5803 * done the selection.
5805 net->ro._s_addr = sctp_source_address_selection(inp,
5806 stcb, (sctp_route_t *)&net->ro,
5808 if (net->ro._s_addr == NULL)
5811 net->src_addr_selected = 1;
5813 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5814 sizeof(struct in6_addr));
5815 stc.laddr_type = SCTP_IPV6_ADDRESS;
5820 /* Now lets put the SCTP header in place */
5821 initack = mtod(m, struct sctp_init_ack_chunk *);
5822 /* Save it off for quick ref */
5823 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5825 memcpy(stc.identification, SCTP_VERSION_STRING,
5826 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5827 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5828 /* now the chunk header */
5829 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5830 initack->ch.chunk_flags = 0;
5831 /* fill in later from mbuf we build */
5832 initack->ch.chunk_length = 0;
5833 /* place in my tag */
5834 if ((asoc != NULL) &&
5835 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5836 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5837 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5838 /* re-use the v-tags and init-seq here */
5839 initack->init.initiate_tag = htonl(asoc->my_vtag);
5840 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5842 uint32_t vtag, itsn;
5845 atomic_add_int(&asoc->refcnt, 1);
5846 SCTP_TCB_UNLOCK(stcb);
5848 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5849 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5851 * Got a duplicate vtag on some guy behind a
5852 * nat make sure we don't use it.
5856 initack->init.initiate_tag = htonl(vtag);
5857 /* get a TSN to use too */
5858 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5859 initack->init.initial_tsn = htonl(itsn);
5860 SCTP_TCB_LOCK(stcb);
5861 atomic_add_int(&asoc->refcnt, -1);
5863 SCTP_INP_INCR_REF(inp);
5864 SCTP_INP_RUNLOCK(inp);
5865 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5866 initack->init.initiate_tag = htonl(vtag);
5867 /* get a TSN to use too */
5868 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5869 SCTP_INP_RLOCK(inp);
5870 SCTP_INP_DECR_REF(inp);
5873 /* save away my tag to */
5874 stc.my_vtag = initack->init.initiate_tag;
5876 /* set up some of the credits. */
5877 so = inp->sctp_socket;
5879 /* memory problem */
5883 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5885 /* set what I want */
5886 his_limit = ntohs(init_chk->init.num_inbound_streams);
5887 /* choose what I want */
5889 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5890 i_want = asoc->streamoutcnt;
5892 i_want = asoc->pre_open_streams;
5895 i_want = inp->sctp_ep.pre_open_stream_count;
5897 if (his_limit < i_want) {
5898 /* I Want more :< */
5899 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5901 /* I can have what I want :> */
5902 initack->init.num_outbound_streams = htons(i_want);
5904 /* tell him his limit. */
5905 initack->init.num_inbound_streams =
5906 htons(inp->sctp_ep.max_open_streams_intome);
5908 /* adaptation layer indication parameter */
5909 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5910 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5911 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5912 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5913 ali->ph.param_length = htons(parameter_len);
5914 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5915 chunk_len += parameter_len;
5919 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5920 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5921 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5922 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5923 ph->param_type = htons(SCTP_ECN_CAPABLE);
5924 ph->param_length = htons(parameter_len);
5925 chunk_len += parameter_len;
5928 /* PR-SCTP supported parameter */
5929 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5930 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5931 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5932 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5933 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5934 ph->param_length = htons(parameter_len);
5935 chunk_len += parameter_len;
5938 /* Add NAT friendly parameter */
5940 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5941 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5942 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5943 ph->param_length = htons(parameter_len);
5944 chunk_len += parameter_len;
5947 /* And now tell the peer which extensions we support */
5949 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5950 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5951 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5952 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5953 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5954 ((asoc == NULL) && (inp->idata_supported == 1))) {
5955 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5958 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5959 ((asoc == NULL) && (inp->auth_supported == 1))) {
5960 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5962 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5963 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5964 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5965 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5967 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5968 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5969 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5971 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5972 ((asoc == NULL) && (inp->idata_supported == 1))) {
5973 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5975 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5976 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5977 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5979 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5980 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5981 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5984 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5985 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5986 pr_supported->ph.param_length = htons(parameter_len);
5987 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5988 chunk_len += parameter_len;
5991 /* add authentication parameters */
5992 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5993 ((asoc == NULL) && (inp->auth_supported == 1))) {
5994 struct sctp_auth_random *randp;
5995 struct sctp_auth_hmac_algo *hmacs;
5996 struct sctp_auth_chunk_list *chunks;
5998 if (padding_len > 0) {
5999 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6000 chunk_len += padding_len;
6003 /* generate and add RANDOM parameter */
6004 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6005 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
6006 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6007 randp->ph.param_type = htons(SCTP_RANDOM);
6008 randp->ph.param_length = htons(parameter_len);
6009 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6010 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6011 chunk_len += parameter_len;
6013 if (padding_len > 0) {
6014 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6015 chunk_len += padding_len;
6018 /* add HMAC_ALGO parameter */
6019 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6020 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6021 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6022 (uint8_t *)hmacs->hmac_ids);
6023 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6024 hmacs->ph.param_length = htons(parameter_len);
6025 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6026 chunk_len += parameter_len;
6028 if (padding_len > 0) {
6029 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6030 chunk_len += padding_len;
6033 /* add CHUNKS parameter */
6034 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6035 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6036 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6037 chunks->chunk_types);
6038 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6039 chunks->ph.param_length = htons(parameter_len);
6040 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6041 chunk_len += parameter_len;
6043 SCTP_BUF_LEN(m) = chunk_len;
6045 /* now the addresses */
6047 * To optimize this we could put the scoping stuff into a structure
6048 * and remove the individual uint8's from the stc structure. Then we
6049 * could just sifa in the address within the stc.. but for now this
6050 * is a quick hack to get the address stuff teased apart.
6052 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6053 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6054 scp.loopback_scope = stc.loopback_scope;
6055 scp.ipv4_local_scope = stc.ipv4_scope;
6056 scp.local_scope = stc.local_scope;
6057 scp.site_scope = stc.site_scope;
6058 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6060 &padding_len, &chunk_len);
6061 /* padding_len can only be positive, if no addresses have been added */
6062 if (padding_len > 0) {
6063 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6064 chunk_len += padding_len;
6065 SCTP_BUF_LEN(m) += padding_len;
6069 /* tack on the operational error if present */
6072 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6073 parameter_len += SCTP_BUF_LEN(m_tmp);
6075 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6076 SCTP_BUF_NEXT(m_last) = op_err;
6077 while (SCTP_BUF_NEXT(m_last) != NULL) {
6078 m_last = SCTP_BUF_NEXT(m_last);
6080 chunk_len += parameter_len;
6082 if (padding_len > 0) {
6083 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6084 if (m_last == NULL) {
6085 /* Houston we have a problem, no space */
6089 chunk_len += padding_len;
6092 /* Now we must build a cookie */
6093 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6094 if (m_cookie == NULL) {
6095 /* memory problem */
6099 /* Now append the cookie to the end and update the space/size */
6100 SCTP_BUF_NEXT(m_last) = m_cookie;
6102 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6103 parameter_len += SCTP_BUF_LEN(m_tmp);
6104 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6108 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6109 chunk_len += parameter_len;
6112 * Place in the size, but we don't include the last pad (if any) in
6115 initack->ch.chunk_length = htons(chunk_len);
6118 * Time to sign the cookie, we don't sign over the cookie signature
6119 * though thus we set trailer.
6121 (void)sctp_hmac_m(SCTP_HMAC,
6122 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6123 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6124 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6126 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6127 * here since the timer will drive a retranmission.
6129 if (padding_len > 0) {
6130 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6135 if (stc.loopback_scope) {
6136 over_addr = (union sctp_sockstore *)dst;
6141 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6143 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6146 SCTP_SO_NOT_LOCKED))) {
6147 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6148 if (error == ENOBUFS) {
6150 asoc->ifp_had_enobuf = 1;
6152 SCTP_STAT_INCR(sctps_lowlevelerr);
6156 asoc->ifp_had_enobuf = 0;
6159 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6164 sctp_prune_prsctp(struct sctp_tcb *stcb,
6165 struct sctp_association *asoc,
6166 struct sctp_sndrcvinfo *srcv,
6170 struct sctp_tmit_chunk *chk, *nchk;
6172 SCTP_TCB_LOCK_ASSERT(stcb);
6173 if ((asoc->prsctp_supported) &&
6174 (asoc->sent_queue_cnt_removeable > 0)) {
6175 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6177 * Look for chunks marked with the PR_SCTP flag AND
6178 * the buffer space flag. If the one being sent is
6179 * equal or greater priority then purge the old one
6180 * and free some space.
6182 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6184 * This one is PR-SCTP AND buffer space
6187 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6189 * Lower numbers equates to higher
6190 * priority so if the one we are
6191 * looking at has a larger or equal
6192 * priority we want to drop the data
6193 * and NOT retransmit it.
6197 * We release the book_size
6198 * if the mbuf is here
6203 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6207 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6210 freed_spc += ret_spc;
6211 if (freed_spc >= dataout) {
6214 } /* if chunk was present */
6215 } /* if of sufficient priority */
6216 } /* if chunk has enabled */
6217 } /* tailqforeach */
6219 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6220 /* Here we must move to the sent queue and mark */
6221 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6222 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6225 * We release the book_size
6226 * if the mbuf is here
6230 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6233 freed_spc += ret_spc;
6234 if (freed_spc >= dataout) {
6237 } /* end if chk->data */
6238 } /* end if right class */
6239 } /* end if chk pr-sctp */
6240 } /* tailqforeachsafe (chk) */
6241 } /* if enabled in asoc */
6245 sctp_get_frag_point(struct sctp_tcb *stcb,
6246 struct sctp_association *asoc)
6251 * For endpoints that have both v6 and v4 addresses we must reserve
6252 * room for the ipv6 header, for those that are only dealing with V4
6253 * we use a larger frag point.
6255 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6256 ovh = SCTP_MIN_OVERHEAD;
6258 ovh = SCTP_MIN_V4_OVERHEAD;
6260 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6261 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6262 siz = asoc->smallest_mtu - ovh;
6264 siz = (stcb->asoc.sctp_frag_point - ovh);
6266 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6268 /* A data chunk MUST fit in a cluster */
6269 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6272 /* adjust for an AUTH chunk if DATA requires auth */
6273 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6274 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6277 /* make it an even word boundary please */
6284 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6287 * We assume that the user wants PR_SCTP_TTL if the user provides a
6288 * positive lifetime but does not specify any PR_SCTP policy.
6290 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6291 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6292 } else if (sp->timetolive > 0) {
6293 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6294 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6298 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6299 case CHUNK_FLAGS_PR_SCTP_BUF:
6301 * Time to live is a priority stored in tv_sec when doing
6302 * the buffer drop thing.
6304 sp->ts.tv_sec = sp->timetolive;
6307 case CHUNK_FLAGS_PR_SCTP_TTL:
6311 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6312 tv.tv_sec = sp->timetolive / 1000;
6313 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6315 * TODO sctp_constants.h needs alternative time
6316 * macros when _KERNEL is undefined.
6318 timevaladd(&sp->ts, &tv);
6321 case CHUNK_FLAGS_PR_SCTP_RTX:
6323 * Time to live is a the number or retransmissions stored in
6326 sp->ts.tv_sec = sp->timetolive;
6330 SCTPDBG(SCTP_DEBUG_USRREQ1,
6331 "Unknown PR_SCTP policy %u.\n",
6332 PR_SCTP_POLICY(sp->sinfo_flags));
6338 sctp_msg_append(struct sctp_tcb *stcb,
6339 struct sctp_nets *net,
6341 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6345 struct sctp_stream_queue_pending *sp = NULL;
6346 struct sctp_stream_out *strm;
6349 * Given an mbuf chain, put it into the association send queue and
6350 * place it on the wheel
6352 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6353 /* Invalid stream number */
6354 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6358 if ((stcb->asoc.stream_locked) &&
6359 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6360 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6364 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6365 /* Now can we send this? */
6366 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6367 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6368 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6369 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6370 /* got data while shutting down */
6371 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6375 sctp_alloc_a_strmoq(stcb, sp);
6377 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6381 sp->sinfo_flags = srcv->sinfo_flags;
6382 sp->timetolive = srcv->sinfo_timetolive;
6383 sp->ppid = srcv->sinfo_ppid;
6384 sp->context = srcv->sinfo_context;
6386 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6388 atomic_add_int(&sp->net->ref_count, 1);
6392 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6393 sp->sid = srcv->sinfo_stream;
6394 sp->msg_is_complete = 1;
6395 sp->sender_all_done = 1;
6398 sp->tail_mbuf = NULL;
6399 sctp_set_prsctp_policy(sp);
6401 * We could in theory (for sendall) sifa the length in, but we would
6402 * still have to hunt through the chain since we need to setup the
6406 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6407 if (SCTP_BUF_NEXT(at) == NULL)
6409 sp->length += SCTP_BUF_LEN(at);
6411 if (srcv->sinfo_keynumber_valid) {
6412 sp->auth_keyid = srcv->sinfo_keynumber;
6414 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6416 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6417 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6418 sp->holds_key_ref = 1;
6420 if (hold_stcb_lock == 0) {
6421 SCTP_TCB_SEND_LOCK(stcb);
6423 sctp_snd_sb_alloc(stcb, sp->length);
6424 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6425 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6426 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6428 if (hold_stcb_lock == 0) {
6429 SCTP_TCB_SEND_UNLOCK(stcb);
6439 static struct mbuf *
6440 sctp_copy_mbufchain(struct mbuf *clonechain,
6441 struct mbuf *outchain,
6442 struct mbuf **endofchain,
6445 uint8_t copy_by_ref)
6448 struct mbuf *appendchain;
6452 if (endofchain == NULL) {
6456 sctp_m_freem(outchain);
6459 if (can_take_mbuf) {
6460 appendchain = clonechain;
6463 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6465 /* Its not in a cluster */
6466 if (*endofchain == NULL) {
6467 /* lets get a mbuf cluster */
6468 if (outchain == NULL) {
6469 /* This is the general case */
6471 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6472 if (outchain == NULL) {
6475 SCTP_BUF_LEN(outchain) = 0;
6476 *endofchain = outchain;
6477 /* get the prepend space */
6478 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6481 * We really should not get a NULL
6487 if (SCTP_BUF_NEXT(m) == NULL) {
6491 m = SCTP_BUF_NEXT(m);
6494 if (*endofchain == NULL) {
6496 * huh, TSNH XXX maybe we
6499 sctp_m_freem(outchain);
6503 /* get the new end of length */
6504 len = (int)M_TRAILINGSPACE(*endofchain);
6506 /* how much is left at the end? */
6507 len = (int)M_TRAILINGSPACE(*endofchain);
6509 /* Find the end of the data, for appending */
6510 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6512 /* Now lets copy it out */
6513 if (len >= sizeofcpy) {
6514 /* It all fits, copy it in */
6515 m_copydata(clonechain, 0, sizeofcpy, cp);
6516 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6518 /* fill up the end of the chain */
6520 m_copydata(clonechain, 0, len, cp);
6521 SCTP_BUF_LEN((*endofchain)) += len;
6522 /* now we need another one */
6525 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6530 SCTP_BUF_NEXT((*endofchain)) = m;
6532 cp = mtod((*endofchain), caddr_t);
6533 m_copydata(clonechain, len, sizeofcpy, cp);
6534 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6538 /* copy the old fashion way */
6539 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6540 #ifdef SCTP_MBUF_LOGGING
6541 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6542 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6547 if (appendchain == NULL) {
6550 sctp_m_freem(outchain);
6554 /* tack on to the end */
6555 if (*endofchain != NULL) {
6556 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6560 if (SCTP_BUF_NEXT(m) == NULL) {
6561 SCTP_BUF_NEXT(m) = appendchain;
6564 m = SCTP_BUF_NEXT(m);
6568 * save off the end and update the end-chain position
6572 if (SCTP_BUF_NEXT(m) == NULL) {
6576 m = SCTP_BUF_NEXT(m);
6580 /* save off the end and update the end-chain position */
6583 if (SCTP_BUF_NEXT(m) == NULL) {
6587 m = SCTP_BUF_NEXT(m);
6589 return (appendchain);
6594 sctp_med_chunk_output(struct sctp_inpcb *inp,
6595 struct sctp_tcb *stcb,
6596 struct sctp_association *asoc,
6599 int control_only, int from_where,
6600 struct timeval *now, int *now_filled, int frag_point, int so_locked
6601 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6607 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6608 uint32_t val SCTP_UNUSED)
6610 struct sctp_copy_all *ca;
6613 int added_control = 0;
6614 int un_sent, do_chunk_output = 1;
6615 struct sctp_association *asoc;
6616 struct sctp_nets *net;
6618 ca = (struct sctp_copy_all *)ptr;
6619 if (ca->m == NULL) {
6622 if (ca->inp != inp) {
6626 if (ca->sndlen > 0) {
6627 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6629 /* can't copy so we are done */
6633 #ifdef SCTP_MBUF_LOGGING
6634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6635 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6641 SCTP_TCB_LOCK_ASSERT(stcb);
6642 if (stcb->asoc.alternate) {
6643 net = stcb->asoc.alternate;
6645 net = stcb->asoc.primary_destination;
6647 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6648 /* Abort this assoc with m as the user defined reason */
6650 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6652 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6653 0, M_NOWAIT, 1, MT_DATA);
6654 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6657 struct sctp_paramhdr *ph;
6659 ph = mtod(m, struct sctp_paramhdr *);
6660 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6661 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6664 * We add one here to keep the assoc from dis-appearing on
6667 atomic_add_int(&stcb->asoc.refcnt, 1);
6668 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6670 * sctp_abort_an_association calls sctp_free_asoc() free
6671 * association will NOT free it since we incremented the
6672 * refcnt .. we do this to prevent it being freed and things
6673 * getting tricky since we could end up (from free_asoc)
6674 * calling inpcb_free which would get a recursive lock call
6675 * to the iterator lock.. But as a consequence of that the
6676 * stcb will return to us un-locked.. since free_asoc
6677 * returns with either no TCB or the TCB unlocked, we must
6678 * relock.. to unlock in the iterator timer :-0
6680 SCTP_TCB_LOCK(stcb);
6681 atomic_add_int(&stcb->asoc.refcnt, -1);
6682 goto no_chunk_output;
6685 ret = sctp_msg_append(stcb, net, m,
6689 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6690 /* shutdown this assoc */
6691 if (TAILQ_EMPTY(&asoc->send_queue) &&
6692 TAILQ_EMPTY(&asoc->sent_queue) &&
6693 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6694 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6698 * there is nothing queued to send, so I'm
6701 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6702 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6703 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6705 * only send SHUTDOWN the first time
6708 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6709 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6711 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6712 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6713 sctp_stop_timers_for_shutdown(stcb);
6714 sctp_send_shutdown(stcb, net);
6715 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6717 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6718 asoc->primary_destination);
6720 do_chunk_output = 0;
6724 * we still got (or just got) data to send,
6725 * so set SHUTDOWN_PENDING
6728 * XXX sockets draft says that SCTP_EOF
6729 * should be sent with no data. currently,
6730 * we will allow user data to be sent first
6731 * and move to SHUTDOWN-PENDING
6733 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6734 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6735 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6736 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6737 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6739 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6740 if (TAILQ_EMPTY(&asoc->send_queue) &&
6741 TAILQ_EMPTY(&asoc->sent_queue) &&
6742 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6743 struct mbuf *op_err;
6744 char msg[SCTP_DIAG_INFO_LEN];
6747 snprintf(msg, sizeof(msg),
6748 "%s:%d at %s", __FILE__, __LINE__, __func__);
6749 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6751 atomic_add_int(&stcb->asoc.refcnt, 1);
6752 sctp_abort_an_association(stcb->sctp_ep, stcb,
6753 op_err, SCTP_SO_NOT_LOCKED);
6754 atomic_add_int(&stcb->asoc.refcnt, -1);
6755 goto no_chunk_output;
6757 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6758 asoc->primary_destination);
6764 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6765 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6767 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6768 (stcb->asoc.total_flight > 0) &&
6769 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6770 do_chunk_output = 0;
6772 if (do_chunk_output)
6773 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6774 else if (added_control) {
6775 int num_out, reason, now_filled = 0;
6779 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6780 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6781 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6792 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6794 struct sctp_copy_all *ca;
6796 ca = (struct sctp_copy_all *)ptr;
6798 * Do a notify here? Kacheong suggests that the notify be done at
6799 * the send time.. so you would push up a notification if any send
6800 * failed. Don't know if this is feasible since the only failures we
6801 * have is "memory" related and if you cannot get an mbuf to send
6802 * the data you surely can't get an mbuf to send up to notify the
6803 * user you can't send the data :->
6806 /* now free everything */
6807 sctp_m_freem(ca->m);
6808 SCTP_FREE(ca, SCTP_M_COPYAL);
6811 static struct mbuf *
6812 sctp_copy_out_all(struct uio *uio, int len)
6814 struct mbuf *ret, *at;
6815 int left, willcpy, cancpy, error;
6817 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6823 SCTP_BUF_LEN(ret) = 0;
6824 /* save space for the data chunk header */
6825 cancpy = (int)M_TRAILINGSPACE(ret);
6826 willcpy = min(cancpy, left);
6829 /* Align data to the end */
6830 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6836 SCTP_BUF_LEN(at) = willcpy;
6837 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6840 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6841 if (SCTP_BUF_NEXT(at) == NULL) {
6844 at = SCTP_BUF_NEXT(at);
6845 SCTP_BUF_LEN(at) = 0;
6846 cancpy = (int)M_TRAILINGSPACE(at);
6847 willcpy = min(cancpy, left);
6854 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6855 struct sctp_sndrcvinfo *srcv)
6858 struct sctp_copy_all *ca;
6860 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6867 memset(ca, 0, sizeof(struct sctp_copy_all));
6871 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6874 * take off the sendall flag, it would be bad if we failed to do
6877 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6878 /* get length and mbuf chain */
6880 ca->sndlen = (int)uio->uio_resid;
6881 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6882 if (ca->m == NULL) {
6883 SCTP_FREE(ca, SCTP_M_COPYAL);
6884 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6888 /* Gather the length of the send */
6892 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6893 ca->sndlen += SCTP_BUF_LEN(mat);
6896 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6897 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6898 SCTP_ASOC_ANY_STATE,
6900 sctp_sendall_completes, inp, 1);
6902 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6903 SCTP_FREE(ca, SCTP_M_COPYAL);
6904 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6912 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6914 struct sctp_tmit_chunk *chk, *nchk;
6916 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6917 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6918 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6919 asoc->ctrl_queue_cnt--;
6921 sctp_m_freem(chk->data);
6924 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6930 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6932 struct sctp_association *asoc;
6933 struct sctp_tmit_chunk *chk, *nchk;
6934 struct sctp_asconf_chunk *acp;
6937 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6938 /* find SCTP_ASCONF chunk in queue */
6939 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6941 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6942 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6947 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6948 asoc->ctrl_queue_cnt--;
6950 sctp_m_freem(chk->data);
6953 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6960 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6961 struct sctp_association *asoc,
6962 struct sctp_tmit_chunk **data_list,
6964 struct sctp_nets *net)
6967 struct sctp_tmit_chunk *tp1;
6969 for (i = 0; i < bundle_at; i++) {
6970 /* off of the send queue */
6971 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6972 asoc->send_queue_cnt--;
6975 * Any chunk NOT 0 you zap the time chunk 0 gets
6976 * zapped or set based on if a RTO measurment is
6979 data_list[i]->do_rtt = 0;
6982 data_list[i]->sent_rcv_time = net->last_sent_time;
6983 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6984 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6985 if (data_list[i]->whoTo == NULL) {
6986 data_list[i]->whoTo = net;
6987 atomic_add_int(&net->ref_count, 1);
6989 /* on to the sent queue */
6990 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6991 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6992 struct sctp_tmit_chunk *tpp;
6994 /* need to move back */
6996 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6998 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7002 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
7005 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7007 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7012 /* This does not lower until the cum-ack passes it */
7013 asoc->sent_queue_cnt++;
7014 if ((asoc->peers_rwnd <= 0) &&
7015 (asoc->total_flight == 0) &&
7017 /* Mark the chunk as being a window probe */
7018 SCTP_STAT_INCR(sctps_windowprobed);
7020 #ifdef SCTP_AUDITING_ENABLED
7021 sctp_audit_log(0xC2, 3);
7023 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7024 data_list[i]->snd_count = 1;
7025 data_list[i]->rec.data.chunk_was_revoked = 0;
7026 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7027 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7028 data_list[i]->whoTo->flight_size,
7029 data_list[i]->book_size,
7030 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7031 data_list[i]->rec.data.tsn);
7033 sctp_flight_size_increase(data_list[i]);
7034 sctp_total_flight_increase(stcb, data_list[i]);
7035 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7036 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7037 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7039 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7040 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7041 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7042 /* SWS sender side engages */
7043 asoc->peers_rwnd = 0;
7046 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7047 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7052 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7053 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7058 struct sctp_tmit_chunk *chk, *nchk;
7060 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7061 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7062 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7063 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7064 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7065 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7066 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7067 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7068 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7069 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7070 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7071 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7072 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7073 /* Stray chunks must be cleaned up */
7075 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7076 asoc->ctrl_queue_cnt--;
7078 sctp_m_freem(chk->data);
7081 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
7082 asoc->fwd_tsn_cnt--;
7084 sctp_free_a_chunk(stcb, chk, so_locked);
7085 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7086 /* special handling, we must look into the param */
7087 if (chk != asoc->str_reset) {
7088 goto clean_up_anyway;
7095 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7096 uint32_t space_left, uint32_t frag_point, int eeor_on)
7099 * Make a decision on if I should split a msg into multiple parts.
7100 * This is only asked of incomplete messages.
7104 * If we are doing EEOR we need to always send it if its the
7105 * entire thing, since it might be all the guy is putting in
7108 if (space_left >= length) {
7110 * If we have data outstanding,
7111 * we get another chance when the sack
7112 * arrives to transmit - wait for more data
7114 if (stcb->asoc.total_flight == 0) {
7116 * If nothing is in flight, we zero the
7124 /* You can fill the rest */
7125 return (space_left);
7129 * For those strange folk that make the send buffer
7130 * smaller than our fragmentation point, we can't
7131 * get a full msg in so we have to allow splitting.
7133 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7136 if ((length <= space_left) ||
7137 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7138 /* Sub-optimial residual don't split in non-eeor mode. */
7142 * If we reach here length is larger than the space_left. Do we wish
7143 * to split it for the sake of packet putting together?
7145 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7146 /* Its ok to split it */
7147 return (min(space_left, frag_point));
7149 /* Nope, can't split */
7154 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7155 struct sctp_stream_out *strq,
7156 uint32_t space_left,
7157 uint32_t frag_point,
7162 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7167 /* Move from the stream to the send_queue keeping track of the total */
7168 struct sctp_association *asoc;
7169 struct sctp_stream_queue_pending *sp;
7170 struct sctp_tmit_chunk *chk;
7171 struct sctp_data_chunk *dchkh = NULL;
7172 struct sctp_idata_chunk *ndchkh = NULL;
7173 uint32_t to_move, length;
7175 uint8_t rcv_flags = 0;
7177 uint8_t send_lock_up = 0;
7179 SCTP_TCB_LOCK_ASSERT(stcb);
7182 /* sa_ignore FREED_MEMORY */
7183 sp = TAILQ_FIRST(&strq->outqueue);
7185 if (send_lock_up == 0) {
7186 SCTP_TCB_SEND_LOCK(stcb);
7189 sp = TAILQ_FIRST(&strq->outqueue);
7193 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7194 (stcb->asoc.idata_supported == 0) &&
7195 (strq->last_msg_incomplete)) {
7196 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7198 strq->last_msg_incomplete);
7199 strq->last_msg_incomplete = 0;
7203 SCTP_TCB_SEND_UNLOCK(stcb);
7208 if ((sp->msg_is_complete) && (sp->length == 0)) {
7209 if (sp->sender_all_done) {
7211 * We are doing differed cleanup. Last time through
7212 * when we took all the data the sender_all_done was
7215 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7216 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7217 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7218 sp->sender_all_done,
7220 sp->msg_is_complete,
7224 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7225 SCTP_TCB_SEND_LOCK(stcb);
7228 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7229 TAILQ_REMOVE(&strq->outqueue, sp, next);
7230 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7231 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7232 (strq->chunks_on_queues == 0) &&
7233 TAILQ_EMPTY(&strq->outqueue)) {
7234 stcb->asoc.trigger_reset = 1;
7237 sctp_free_remote_addr(sp->net);
7241 sctp_m_freem(sp->data);
7244 sctp_free_a_strmoq(stcb, sp, so_locked);
7245 /* we can't be locked to it */
7247 SCTP_TCB_SEND_UNLOCK(stcb);
7250 /* back to get the next msg */
7254 * sender just finished this but still holds a
7262 /* is there some to get */
7263 if (sp->length == 0) {
7268 } else if (sp->discard_rest) {
7269 if (send_lock_up == 0) {
7270 SCTP_TCB_SEND_LOCK(stcb);
7273 /* Whack down the size */
7274 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7275 if ((stcb->sctp_socket != NULL) &&
7276 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7277 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7278 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7281 sctp_m_freem(sp->data);
7283 sp->tail_mbuf = NULL;
7292 some_taken = sp->some_taken;
7294 length = sp->length;
7295 if (sp->msg_is_complete) {
7296 /* The message is complete */
7297 to_move = min(length, frag_point);
7298 if (to_move == length) {
7299 /* All of it fits in the MTU */
7300 if (sp->some_taken) {
7301 rcv_flags |= SCTP_DATA_LAST_FRAG;
7303 rcv_flags |= SCTP_DATA_NOT_FRAG;
7305 sp->put_last_out = 1;
7306 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7307 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7310 /* Not all of it fits, we fragment */
7311 if (sp->some_taken == 0) {
7312 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7317 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7320 * We use a snapshot of length in case it
7321 * is expanding during the compare.
7326 if (to_move >= llen) {
7328 if (send_lock_up == 0) {
7330 * We are taking all of an incomplete msg
7331 * thus we need a send lock.
7333 SCTP_TCB_SEND_LOCK(stcb);
7335 if (sp->msg_is_complete) {
7337 * the sender finished the
7344 if (sp->some_taken == 0) {
7345 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7349 /* Nothing to take. */
7356 /* If we reach here, we can copy out a chunk */
7357 sctp_alloc_a_chunk(stcb, chk);
7359 /* No chunk memory */
7365 * Setup for unordered if needed by looking at the user sent info
7368 if (sp->sinfo_flags & SCTP_UNORDERED) {
7369 rcv_flags |= SCTP_DATA_UNORDERED;
7371 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7372 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7373 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7375 /* clear out the chunk before setting up */
7376 memset(chk, 0, sizeof(*chk));
7377 chk->rec.data.rcv_flags = rcv_flags;
7379 if (to_move >= length) {
7380 /* we think we can steal the whole thing */
7381 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7382 SCTP_TCB_SEND_LOCK(stcb);
7385 if (to_move < sp->length) {
7386 /* bail, it changed */
7389 chk->data = sp->data;
7390 chk->last_mbuf = sp->tail_mbuf;
7391 /* register the stealing */
7392 sp->data = sp->tail_mbuf = NULL;
7397 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7398 chk->last_mbuf = NULL;
7399 if (chk->data == NULL) {
7400 sp->some_taken = some_taken;
7401 sctp_free_a_chunk(stcb, chk, so_locked);
7406 #ifdef SCTP_MBUF_LOGGING
7407 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7408 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7411 /* Pull off the data */
7412 m_adj(sp->data, to_move);
7413 /* Now lets work our way down and compact it */
7415 while (m && (SCTP_BUF_LEN(m) == 0)) {
7416 sp->data = SCTP_BUF_NEXT(m);
7417 SCTP_BUF_NEXT(m) = NULL;
7418 if (sp->tail_mbuf == m) {
7420 * Freeing tail? TSNH since
7421 * we supposedly were taking less
7422 * than the sp->length.
7425 panic("Huh, freing tail? - TSNH");
7427 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7428 sp->tail_mbuf = sp->data = NULL;
7437 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7438 chk->copy_by_ref = 1;
7440 chk->copy_by_ref = 0;
7443 * get last_mbuf and counts of mb usage This is ugly but hopefully
7444 * its only one mbuf.
7446 if (chk->last_mbuf == NULL) {
7447 chk->last_mbuf = chk->data;
7448 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7449 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7453 if (to_move > length) {
7454 /*- This should not happen either
7455 * since we always lower to_move to the size
7456 * of sp->length if its larger.
7459 panic("Huh, how can to_move be larger?");
7461 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7465 atomic_subtract_int(&sp->length, to_move);
7467 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7468 if (M_LEADINGSPACE(chk->data) < leading) {
7469 /* Not enough room for a chunk header, get some */
7472 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 1, MT_DATA);
7475 * we're in trouble here. _PREPEND below will free
7476 * all the data if there is no leading space, so we
7477 * must put the data back and restore.
7479 if (send_lock_up == 0) {
7480 SCTP_TCB_SEND_LOCK(stcb);
7483 if (sp->data == NULL) {
7484 /* unsteal the data */
7485 sp->data = chk->data;
7486 sp->tail_mbuf = chk->last_mbuf;
7490 /* reassemble the data */
7492 sp->data = chk->data;
7493 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7495 sp->some_taken = some_taken;
7496 atomic_add_int(&sp->length, to_move);
7499 sctp_free_a_chunk(stcb, chk, so_locked);
7503 SCTP_BUF_LEN(m) = 0;
7504 SCTP_BUF_NEXT(m) = chk->data;
7506 M_ALIGN(chk->data, 4);
7509 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7510 if (chk->data == NULL) {
7511 /* HELP, TSNH since we assured it would not above? */
7513 panic("prepend failes HELP?");
7515 SCTP_PRINTF("prepend fails HELP?\n");
7516 sctp_free_a_chunk(stcb, chk, so_locked);
7522 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7523 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7524 chk->book_size_scale = 0;
7525 chk->sent = SCTP_DATAGRAM_UNSENT;
7528 chk->asoc = &stcb->asoc;
7529 chk->pad_inplace = 0;
7530 chk->no_fr_allowed = 0;
7531 if (stcb->asoc.idata_supported == 0) {
7532 if (rcv_flags & SCTP_DATA_UNORDERED) {
7533 /* Just use 0. The receiver ignores the values. */
7534 chk->rec.data.mid = 0;
7536 chk->rec.data.mid = strq->next_mid_ordered;
7537 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7538 strq->next_mid_ordered++;
7542 if (rcv_flags & SCTP_DATA_UNORDERED) {
7543 chk->rec.data.mid = strq->next_mid_unordered;
7544 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7545 strq->next_mid_unordered++;
7548 chk->rec.data.mid = strq->next_mid_ordered;
7549 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7550 strq->next_mid_ordered++;
7554 chk->rec.data.sid = sp->sid;
7555 chk->rec.data.ppid = sp->ppid;
7556 chk->rec.data.context = sp->context;
7557 chk->rec.data.doing_fast_retransmit = 0;
7559 chk->rec.data.timetodrop = sp->ts;
7560 chk->flags = sp->act_flags;
7563 chk->whoTo = sp->net;
7564 atomic_add_int(&chk->whoTo->ref_count, 1);
7568 if (sp->holds_key_ref) {
7569 chk->auth_keyid = sp->auth_keyid;
7570 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7571 chk->holds_key_ref = 1;
7573 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7574 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7575 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7576 (uint32_t)(uintptr_t)stcb, sp->length,
7577 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7580 if (stcb->asoc.idata_supported == 0) {
7581 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7583 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7586 * Put the rest of the things in place now. Size was done earlier in
7587 * previous loop prior to padding.
7590 #ifdef SCTP_ASOCLOG_OF_TSNS
7591 SCTP_TCB_LOCK_ASSERT(stcb);
7592 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7593 asoc->tsn_out_at = 0;
7594 asoc->tsn_out_wrapped = 1;
7596 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7597 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7598 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7599 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7600 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7601 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7602 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7603 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7606 if (stcb->asoc.idata_supported == 0) {
7607 dchkh->ch.chunk_type = SCTP_DATA;
7608 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7609 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7610 dchkh->dp.sid = htons(strq->sid);
7611 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7612 dchkh->dp.ppid = chk->rec.data.ppid;
7613 dchkh->ch.chunk_length = htons(chk->send_size);
7615 ndchkh->ch.chunk_type = SCTP_IDATA;
7616 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7617 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7618 ndchkh->dp.sid = htons(strq->sid);
7619 ndchkh->dp.reserved = htons(0);
7620 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7622 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7624 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7626 ndchkh->ch.chunk_length = htons(chk->send_size);
7628 /* Now advance the chk->send_size by the actual pad needed. */
7629 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7634 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7635 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7637 chk->last_mbuf = lm;
7638 chk->pad_inplace = 1;
7640 chk->send_size += pads;
7642 if (PR_SCTP_ENABLED(chk->flags)) {
7643 asoc->pr_sctp_cnt++;
7645 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7646 /* All done pull and kill the message */
7647 if (sp->put_last_out == 0) {
7648 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7649 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7650 sp->sender_all_done,
7652 sp->msg_is_complete,
7656 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7657 SCTP_TCB_SEND_LOCK(stcb);
7660 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7661 TAILQ_REMOVE(&strq->outqueue, sp, next);
7662 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7663 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7664 (strq->chunks_on_queues == 0) &&
7665 TAILQ_EMPTY(&strq->outqueue)) {
7666 stcb->asoc.trigger_reset = 1;
7669 sctp_free_remote_addr(sp->net);
7673 sctp_m_freem(sp->data);
7676 sctp_free_a_strmoq(stcb, sp, so_locked);
7678 asoc->chunks_on_out_queue++;
7679 strq->chunks_on_queues++;
7680 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7681 asoc->send_queue_cnt++;
7684 SCTP_TCB_SEND_UNLOCK(stcb);
7691 sctp_fill_outqueue(struct sctp_tcb *stcb,
7692 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7693 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7698 struct sctp_association *asoc;
7699 struct sctp_stream_out *strq;
7700 uint32_t space_left, moved, total_moved;
7703 SCTP_TCB_LOCK_ASSERT(stcb);
7706 switch (net->ro._l_addr.sa.sa_family) {
7709 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7714 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7719 space_left = net->mtu;
7722 /* Need an allowance for the data chunk header too */
7723 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7725 /* must make even word boundary */
7726 space_left &= 0xfffffffc;
7727 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7730 while ((space_left > 0) && (strq != NULL)) {
7731 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7732 &giveup, eeor_mode, &bail, so_locked);
7733 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7734 if ((giveup != 0) || (bail != 0)) {
7737 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7738 total_moved += moved;
7739 space_left -= moved;
7740 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7741 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7745 space_left &= 0xfffffffc;
7750 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7752 if (total_moved == 0) {
7753 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7754 (net == stcb->asoc.primary_destination)) {
7755 /* ran dry for primary network net */
7756 SCTP_STAT_INCR(sctps_primary_randry);
7757 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7758 /* ran dry with CMT on */
7759 SCTP_STAT_INCR(sctps_cmt_randry);
7765 sctp_fix_ecn_echo(struct sctp_association *asoc)
7767 struct sctp_tmit_chunk *chk;
7769 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7770 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7771 chk->sent = SCTP_DATAGRAM_UNSENT;
7777 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7779 struct sctp_association *asoc;
7780 struct sctp_tmit_chunk *chk;
7781 struct sctp_stream_queue_pending *sp;
7788 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7789 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7790 if (sp->net == net) {
7791 sctp_free_remote_addr(sp->net);
7796 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7797 if (chk->whoTo == net) {
7798 sctp_free_remote_addr(chk->whoTo);
7805 sctp_med_chunk_output(struct sctp_inpcb *inp,
7806 struct sctp_tcb *stcb,
7807 struct sctp_association *asoc,
7810 int control_only, int from_where,
7811 struct timeval *now, int *now_filled, int frag_point, int so_locked
7812 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7818 * Ok this is the generic chunk service queue. we must do the
7820 * - Service the stream queue that is next, moving any
7821 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7822 * LAST to the out queue in one pass) and assigning TSN's. This
7823 * only applys though if the peer does not support NDATA. For NDATA
7824 * chunks its ok to not send the entire message ;-)
7825 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7826 * fomulate and send the low level chunks. Making sure to combine
7827 * any control in the control chunk queue also.
7829 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7830 struct mbuf *outchain, *endoutchain;
7831 struct sctp_tmit_chunk *chk, *nchk;
7833 /* temp arrays for unlinking */
7834 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7835 int no_fragmentflg, error;
7836 unsigned int max_rwnd_per_dest, max_send_per_dest;
7837 int one_chunk, hbflag, skip_data_for_this_net;
7838 int asconf, cookie, no_out_cnt;
7839 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7840 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7842 uint32_t auth_offset = 0;
7843 struct sctp_auth_chunk *auth = NULL;
7844 uint16_t auth_keyid;
7845 int override_ok = 1;
7846 int skip_fill_up = 0;
7847 int data_auth_reqd = 0;
7850 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7857 auth_keyid = stcb->asoc.authinfo.active_keyid;
7858 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7859 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7860 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7865 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7867 * First lets prime the pump. For each destination, if there is room
7868 * in the flight size, attempt to pull an MTU's worth out of the
7869 * stream queues into the general send_queue
7871 #ifdef SCTP_AUDITING_ENABLED
7872 sctp_audit_log(0xC2, 2);
7874 SCTP_TCB_LOCK_ASSERT(stcb);
7881 /* Nothing to possible to send? */
7882 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7883 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7884 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7885 TAILQ_EMPTY(&asoc->send_queue) &&
7886 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7891 if (asoc->peers_rwnd == 0) {
7892 /* No room in peers rwnd */
7894 if (asoc->total_flight > 0) {
7895 /* we are allowed one chunk in flight */
7899 if (stcb->asoc.ecn_echo_cnt_onq) {
7900 /* Record where a sack goes, if any */
7901 if (no_data_chunks &&
7902 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7903 /* Nothing but ECNe to send - we don't do that */
7904 goto nothing_to_send;
7906 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7907 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7908 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7909 sack_goes_to = chk->whoTo;
7914 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7915 if (stcb->sctp_socket)
7916 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7918 max_send_per_dest = 0;
7919 if (no_data_chunks == 0) {
7920 /* How many non-directed chunks are there? */
7921 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7922 if (chk->whoTo == NULL) {
7924 * We already have non-directed chunks on
7925 * the queue, no need to do a fill-up.
7933 if ((no_data_chunks == 0) &&
7934 (skip_fill_up == 0) &&
7935 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7936 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7938 * This for loop we are in takes in each net, if
7939 * its's got space in cwnd and has data sent to it
7940 * (when CMT is off) then it calls
7941 * sctp_fill_outqueue for the net. This gets data on
7942 * the send queue for that network.
7944 * In sctp_fill_outqueue TSN's are assigned and data
7945 * is copied out of the stream buffers. Note mostly
7946 * copy by reference (we hope).
7948 net->window_probe = 0;
7949 if ((net != stcb->asoc.alternate) &&
7950 ((net->dest_state & SCTP_ADDR_PF) ||
7951 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7952 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7954 sctp_log_cwnd(stcb, net, 1,
7955 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7959 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7960 (net->flight_size == 0)) {
7961 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7963 if (net->flight_size >= net->cwnd) {
7964 /* skip this network, no room - can't fill */
7965 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7966 sctp_log_cwnd(stcb, net, 3,
7967 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7971 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7972 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7974 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7976 /* memory alloc failure */
7982 /* now service each destination and send out what we can for it */
7983 /* Nothing to send? */
7984 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7985 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7986 TAILQ_EMPTY(&asoc->send_queue)) {
7991 if (asoc->sctp_cmt_on_off > 0) {
7992 /* get the last start point */
7993 start_at = asoc->last_net_cmt_send_started;
7994 if (start_at == NULL) {
7995 /* null so to beginning */
7996 start_at = TAILQ_FIRST(&asoc->nets);
7998 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7999 if (start_at == NULL) {
8000 start_at = TAILQ_FIRST(&asoc->nets);
8003 asoc->last_net_cmt_send_started = start_at;
8005 start_at = TAILQ_FIRST(&asoc->nets);
8007 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8008 if (chk->whoTo == NULL) {
8009 if (asoc->alternate) {
8010 chk->whoTo = asoc->alternate;
8012 chk->whoTo = asoc->primary_destination;
8014 atomic_add_int(&chk->whoTo->ref_count, 1);
8017 old_start_at = NULL;
8018 again_one_more_time:
8019 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8020 /* how much can we send? */
8021 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8022 if (old_start_at && (old_start_at == net)) {
8023 /* through list ocmpletely. */
8027 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8028 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8029 (net->flight_size >= net->cwnd)) {
8031 * Nothing on control or asconf and flight is full,
8032 * we can skip even in the CMT case.
8037 endoutchain = outchain = NULL;
8040 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8041 skip_data_for_this_net = 1;
8043 skip_data_for_this_net = 0;
8045 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8048 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8053 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8063 if (mtu > asoc->peers_rwnd) {
8064 if (asoc->total_flight > 0) {
8065 /* We have a packet in flight somewhere */
8066 r_mtu = asoc->peers_rwnd;
8068 /* We are always allowed to send one MTU out */
8076 /************************/
8077 /* ASCONF transmission */
8078 /************************/
8079 /* Now first lets go through the asconf queue */
8080 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8081 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8084 if (chk->whoTo == NULL) {
8085 if (asoc->alternate == NULL) {
8086 if (asoc->primary_destination != net) {
8090 if (asoc->alternate != net) {
8095 if (chk->whoTo != net) {
8099 if (chk->data == NULL) {
8102 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8103 chk->sent != SCTP_DATAGRAM_RESEND) {
8107 * if no AUTH is yet included and this chunk
8108 * requires it, make sure to account for it. We
8109 * don't apply the size until the AUTH chunk is
8110 * actually added below in case there is no room for
8111 * this chunk. NOTE: we overload the use of "omtu"
8114 if ((auth == NULL) &&
8115 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8116 stcb->asoc.peer_auth_chunks)) {
8117 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8120 /* Here we do NOT factor the r_mtu */
8121 if ((chk->send_size < (int)(mtu - omtu)) ||
8122 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8124 * We probably should glom the mbuf chain
8125 * from the chk->data for control but the
8126 * problem is it becomes yet one more level
8127 * of tracking to do if for some reason
8128 * output fails. Then I have got to
8129 * reconstruct the merged control chain.. el
8130 * yucko.. for now we take the easy way and
8134 * Add an AUTH chunk, if chunk requires it
8135 * save the offset into the chain for AUTH
8137 if ((auth == NULL) &&
8138 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8139 stcb->asoc.peer_auth_chunks))) {
8140 outchain = sctp_add_auth_chunk(outchain,
8145 chk->rec.chunk_id.id);
8146 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8148 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8149 (int)chk->rec.chunk_id.can_take_data,
8150 chk->send_size, chk->copy_by_ref);
8151 if (outchain == NULL) {
8153 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8156 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8157 /* update our MTU size */
8158 if (mtu > (chk->send_size + omtu))
8159 mtu -= (chk->send_size + omtu);
8162 to_out += (chk->send_size + omtu);
8163 /* Do clear IP_DF ? */
8164 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8167 if (chk->rec.chunk_id.can_take_data)
8170 * set hb flag since we can use these for
8176 * should sysctl this: don't bundle data
8177 * with ASCONF since it requires AUTH
8180 chk->sent = SCTP_DATAGRAM_SENT;
8181 if (chk->whoTo == NULL) {
8183 atomic_add_int(&net->ref_count, 1);
8188 * Ok we are out of room but we can
8189 * output without effecting the
8190 * flight size since this little guy
8191 * is a control only packet.
8193 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8195 * do NOT clear the asconf flag as
8196 * it is used to do appropriate
8197 * source address selection.
8199 if (*now_filled == 0) {
8200 (void)SCTP_GETTIME_TIMEVAL(now);
8203 net->last_sent_time = *now;
8205 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8206 (struct sockaddr *)&net->ro._l_addr,
8207 outchain, auth_offset, auth,
8208 stcb->asoc.authinfo.active_keyid,
8209 no_fragmentflg, 0, asconf,
8210 inp->sctp_lport, stcb->rport,
8211 htonl(stcb->asoc.peer_vtag),
8216 * error, we could not
8219 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8220 if (from_where == 0) {
8221 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8223 if (error == ENOBUFS) {
8224 asoc->ifp_had_enobuf = 1;
8225 SCTP_STAT_INCR(sctps_lowlevelerr);
8227 /* error, could not output */
8228 if (error == EHOSTUNREACH) {
8234 sctp_move_chunks_from_net(stcb, net);
8239 asoc->ifp_had_enobuf = 0;
8242 * increase the number we sent, if a
8243 * cookie is sent we don't tell them
8246 outchain = endoutchain = NULL;
8250 *num_out += ctl_cnt;
8251 /* recalc a clean slate and setup */
8252 switch (net->ro._l_addr.sa.sa_family) {
8255 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8260 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8277 /************************/
8278 /* Control transmission */
8279 /************************/
8280 /* Now first lets go through the control queue */
8281 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8282 if ((sack_goes_to) &&
8283 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8284 (chk->whoTo != sack_goes_to)) {
8286 * if we have a sack in queue, and we are
8287 * looking at an ecn echo that is NOT queued
8288 * to where the sack is going..
8290 if (chk->whoTo == net) {
8292 * Don't transmit it to where its
8293 * going (current net)
8296 } else if (sack_goes_to == net) {
8298 * But do transmit it to this
8301 goto skip_net_check;
8304 if (chk->whoTo == NULL) {
8305 if (asoc->alternate == NULL) {
8306 if (asoc->primary_destination != net) {
8310 if (asoc->alternate != net) {
8315 if (chk->whoTo != net) {
8320 if (chk->data == NULL) {
8323 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8325 * It must be unsent. Cookies and ASCONF's
8326 * hang around but there timers will force
8327 * when marked for resend.
8332 * if no AUTH is yet included and this chunk
8333 * requires it, make sure to account for it. We
8334 * don't apply the size until the AUTH chunk is
8335 * actually added below in case there is no room for
8336 * this chunk. NOTE: we overload the use of "omtu"
8339 if ((auth == NULL) &&
8340 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8341 stcb->asoc.peer_auth_chunks)) {
8342 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8345 /* Here we do NOT factor the r_mtu */
8346 if ((chk->send_size <= (int)(mtu - omtu)) ||
8347 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8349 * We probably should glom the mbuf chain
8350 * from the chk->data for control but the
8351 * problem is it becomes yet one more level
8352 * of tracking to do if for some reason
8353 * output fails. Then I have got to
8354 * reconstruct the merged control chain.. el
8355 * yucko.. for now we take the easy way and
8359 * Add an AUTH chunk, if chunk requires it
8360 * save the offset into the chain for AUTH
8362 if ((auth == NULL) &&
8363 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8364 stcb->asoc.peer_auth_chunks))) {
8365 outchain = sctp_add_auth_chunk(outchain,
8370 chk->rec.chunk_id.id);
8371 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8373 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8374 (int)chk->rec.chunk_id.can_take_data,
8375 chk->send_size, chk->copy_by_ref);
8376 if (outchain == NULL) {
8378 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8381 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8382 /* update our MTU size */
8383 if (mtu > (chk->send_size + omtu))
8384 mtu -= (chk->send_size + omtu);
8387 to_out += (chk->send_size + omtu);
8388 /* Do clear IP_DF ? */
8389 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8392 if (chk->rec.chunk_id.can_take_data)
8394 /* Mark things to be removed, if needed */
8395 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8396 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8397 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8398 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8399 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8400 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8401 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8402 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8403 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8404 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8405 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8406 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8409 /* remove these chunks at the end */
8410 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8411 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8412 /* turn off the timer */
8413 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8414 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8416 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8422 * Other chunks, since they have
8423 * timers running (i.e. COOKIE) we
8424 * just "trust" that it gets sent or
8428 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8431 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8433 * Increment ecne send count
8434 * here this means we may be
8435 * over-zealous in our
8436 * counting if the send
8437 * fails, but its the best
8438 * place to do it (we used
8439 * to do it in the queue of
8440 * the chunk, but that did
8441 * not tell how many times
8444 SCTP_STAT_INCR(sctps_sendecne);
8446 chk->sent = SCTP_DATAGRAM_SENT;
8447 if (chk->whoTo == NULL) {
8449 atomic_add_int(&net->ref_count, 1);
8455 * Ok we are out of room but we can
8456 * output without effecting the
8457 * flight size since this little guy
8458 * is a control only packet.
8461 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8463 * do NOT clear the asconf
8464 * flag as it is used to do
8465 * appropriate source
8466 * address selection.
8470 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8473 /* Only HB or ASCONF advances time */
8475 if (*now_filled == 0) {
8476 (void)SCTP_GETTIME_TIMEVAL(now);
8479 net->last_sent_time = *now;
8482 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8483 (struct sockaddr *)&net->ro._l_addr,
8486 stcb->asoc.authinfo.active_keyid,
8487 no_fragmentflg, 0, asconf,
8488 inp->sctp_lport, stcb->rport,
8489 htonl(stcb->asoc.peer_vtag),
8494 * error, we could not
8497 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8498 if (from_where == 0) {
8499 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8501 if (error == ENOBUFS) {
8502 asoc->ifp_had_enobuf = 1;
8503 SCTP_STAT_INCR(sctps_lowlevelerr);
8505 if (error == EHOSTUNREACH) {
8511 sctp_move_chunks_from_net(stcb, net);
8516 asoc->ifp_had_enobuf = 0;
8519 * increase the number we sent, if a
8520 * cookie is sent we don't tell them
8523 outchain = endoutchain = NULL;
8527 *num_out += ctl_cnt;
8528 /* recalc a clean slate and setup */
8529 switch (net->ro._l_addr.sa.sa_family) {
8532 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8537 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8554 /* JRI: if dest is in PF state, do not send data to it */
8555 if ((asoc->sctp_cmt_on_off > 0) &&
8556 (net != stcb->asoc.alternate) &&
8557 (net->dest_state & SCTP_ADDR_PF)) {
8560 if (net->flight_size >= net->cwnd) {
8563 if ((asoc->sctp_cmt_on_off > 0) &&
8564 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8565 (net->flight_size > max_rwnd_per_dest)) {
8569 * We need a specific accounting for the usage of the send
8570 * buffer. We also need to check the number of messages per
8571 * net. For now, this is better than nothing and it disabled
8574 if ((asoc->sctp_cmt_on_off > 0) &&
8575 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8576 (max_send_per_dest > 0) &&
8577 (net->flight_size > max_send_per_dest)) {
8580 /*********************/
8581 /* Data transmission */
8582 /*********************/
8584 * if AUTH for DATA is required and no AUTH has been added
8585 * yet, account for this in the mtu now... if no data can be
8586 * bundled, this adjustment won't matter anyways since the
8587 * packet will be going out...
8589 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8590 stcb->asoc.peer_auth_chunks);
8591 if (data_auth_reqd && (auth == NULL)) {
8592 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8594 /* now lets add any data within the MTU constraints */
8595 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8598 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8599 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8606 if (net->mtu > SCTP_MIN_OVERHEAD)
8607 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8617 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8618 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8619 (skip_data_for_this_net == 0)) ||
8621 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8622 if (no_data_chunks) {
8623 /* let only control go out */
8627 if (net->flight_size >= net->cwnd) {
8628 /* skip this net, no room for data */
8632 if ((chk->whoTo != NULL) &&
8633 (chk->whoTo != net)) {
8634 /* Don't send the chunk on this net */
8638 if (asoc->sctp_cmt_on_off == 0) {
8639 if ((asoc->alternate) &&
8640 (asoc->alternate != net) &&
8641 (chk->whoTo == NULL)) {
8643 } else if ((net != asoc->primary_destination) &&
8644 (asoc->alternate == NULL) &&
8645 (chk->whoTo == NULL)) {
8649 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8651 * strange, we have a chunk that is
8652 * to big for its destination and
8653 * yet no fragment ok flag.
8654 * Something went wrong when the
8655 * PMTU changed...we did not mark
8656 * this chunk for some reason?? I
8657 * will fix it here by letting IP
8658 * fragment it for now and printing
8659 * a warning. This really should not
8662 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8663 chk->send_size, mtu);
8664 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8666 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8667 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8668 struct sctp_data_chunk *dchkh;
8670 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8671 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8673 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8674 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8675 /* ok we will add this one */
8678 * Add an AUTH chunk, if chunk
8679 * requires it, save the offset into
8680 * the chain for AUTH
8682 if (data_auth_reqd) {
8684 outchain = sctp_add_auth_chunk(outchain,
8690 auth_keyid = chk->auth_keyid;
8692 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8693 } else if (override_ok) {
8698 auth_keyid = chk->auth_keyid;
8700 } else if (auth_keyid != chk->auth_keyid) {
8708 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8709 chk->send_size, chk->copy_by_ref);
8710 if (outchain == NULL) {
8711 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8712 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8713 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8716 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8719 /* upate our MTU size */
8720 /* Do clear IP_DF ? */
8721 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8724 /* unsigned subtraction of mtu */
8725 if (mtu > chk->send_size)
8726 mtu -= chk->send_size;
8729 /* unsigned subtraction of r_mtu */
8730 if (r_mtu > chk->send_size)
8731 r_mtu -= chk->send_size;
8735 to_out += chk->send_size;
8736 if ((to_out > mx_mtu) && no_fragmentflg) {
8738 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8740 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8744 chk->window_probe = 0;
8745 data_list[bundle_at++] = chk;
8746 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8749 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8750 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8751 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8753 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8755 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8756 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8766 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8768 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8769 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8770 data_list[0]->window_probe = 1;
8771 net->window_probe = 1;
8777 * Must be sent in order of the
8778 * TSN's (on a network)
8782 } /* for (chunk gather loop for this net) */
8783 } /* if asoc.state OPEN */
8785 /* Is there something to send for this destination? */
8787 /* We may need to start a control timer or two */
8789 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8792 * do NOT clear the asconf flag as it is
8793 * used to do appropriate source address
8798 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8801 /* must start a send timer if data is being sent */
8802 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8804 * no timer running on this destination
8807 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8809 if (bundle_at || hbflag) {
8810 /* For data/asconf and hb set time */
8811 if (*now_filled == 0) {
8812 (void)SCTP_GETTIME_TIMEVAL(now);
8815 net->last_sent_time = *now;
8817 /* Now send it, if there is anything to send :> */
8818 if ((error = sctp_lowlevel_chunk_output(inp,
8821 (struct sockaddr *)&net->ro._l_addr,
8829 inp->sctp_lport, stcb->rport,
8830 htonl(stcb->asoc.peer_vtag),
8834 /* error, we could not output */
8835 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8836 if (from_where == 0) {
8837 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8839 if (error == ENOBUFS) {
8840 asoc->ifp_had_enobuf = 1;
8841 SCTP_STAT_INCR(sctps_lowlevelerr);
8843 if (error == EHOSTUNREACH) {
8845 * Destination went unreachable
8848 sctp_move_chunks_from_net(stcb, net);
8852 * I add this line to be paranoid. As far as
8853 * I can tell the continue, takes us back to
8854 * the top of the for, but just to make sure
8855 * I will reset these again here.
8857 ctl_cnt = bundle_at = 0;
8858 continue; /* This takes us back to the
8859 * for() for the nets. */
8861 asoc->ifp_had_enobuf = 0;
8867 *num_out += (ctl_cnt + bundle_at);
8870 /* setup for a RTO measurement */
8871 tsns_sent = data_list[0]->rec.data.tsn;
8872 /* fill time if not already filled */
8873 if (*now_filled == 0) {
8874 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8876 *now = asoc->time_last_sent;
8878 asoc->time_last_sent = *now;
8880 if (net->rto_needed) {
8881 data_list[0]->do_rtt = 1;
8882 net->rto_needed = 0;
8884 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8885 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8891 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8892 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8895 if (old_start_at == NULL) {
8896 old_start_at = start_at;
8897 start_at = TAILQ_FIRST(&asoc->nets);
8899 goto again_one_more_time;
8903 * At the end there should be no NON timed chunks hanging on this
8906 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8907 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8909 if ((*num_out == 0) && (*reason_code == 0)) {
8914 sctp_clean_up_ctl(stcb, asoc, so_locked);
8919 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8922 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8923 * the control chunk queue.
8925 struct sctp_chunkhdr *hdr;
8926 struct sctp_tmit_chunk *chk;
8927 struct mbuf *mat, *last_mbuf;
8928 uint32_t chunk_length;
8929 uint16_t padding_length;
8931 SCTP_TCB_LOCK_ASSERT(stcb);
8932 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8933 if (op_err == NULL) {
8938 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8939 chunk_length += SCTP_BUF_LEN(mat);
8940 if (SCTP_BUF_NEXT(mat) == NULL) {
8944 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8945 sctp_m_freem(op_err);
8948 padding_length = chunk_length % 4;
8949 if (padding_length != 0) {
8950 padding_length = 4 - padding_length;
8952 if (padding_length != 0) {
8953 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8954 sctp_m_freem(op_err);
8958 sctp_alloc_a_chunk(stcb, chk);
8961 sctp_m_freem(op_err);
8964 chk->copy_by_ref = 0;
8965 chk->send_size = (uint16_t)chunk_length;
8966 chk->sent = SCTP_DATAGRAM_UNSENT;
8968 chk->asoc = &stcb->asoc;
8971 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8972 chk->rec.chunk_id.can_take_data = 0;
8973 hdr = mtod(op_err, struct sctp_chunkhdr *);
8974 hdr->chunk_type = SCTP_OPERATION_ERROR;
8975 hdr->chunk_flags = 0;
8976 hdr->chunk_length = htons(chk->send_size);
8977 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8978 chk->asoc->ctrl_queue_cnt++;
8982 sctp_send_cookie_echo(struct mbuf *m,
8984 struct sctp_tcb *stcb,
8985 struct sctp_nets *net)
8988 * pull out the cookie and put it at the front of the control chunk
8992 struct mbuf *cookie;
8993 struct sctp_paramhdr param, *phdr;
8994 struct sctp_chunkhdr *hdr;
8995 struct sctp_tmit_chunk *chk;
8996 uint16_t ptype, plen;
8998 SCTP_TCB_LOCK_ASSERT(stcb);
8999 /* First find the cookie in the param area */
9001 at = offset + sizeof(struct sctp_init_chunk);
9003 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
9007 ptype = ntohs(phdr->param_type);
9008 plen = ntohs(phdr->param_length);
9009 if (ptype == SCTP_STATE_COOKIE) {
9012 /* found the cookie */
9013 if ((pad = (plen % 4))) {
9016 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9017 if (cookie == NULL) {
9021 #ifdef SCTP_MBUF_LOGGING
9022 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9023 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9028 at += SCTP_SIZE32(plen);
9030 /* ok, we got the cookie lets change it into a cookie echo chunk */
9031 /* first the change from param to cookie */
9032 hdr = mtod(cookie, struct sctp_chunkhdr *);
9033 hdr->chunk_type = SCTP_COOKIE_ECHO;
9034 hdr->chunk_flags = 0;
9035 /* get the chunk stuff now and place it in the FRONT of the queue */
9036 sctp_alloc_a_chunk(stcb, chk);
9039 sctp_m_freem(cookie);
9042 chk->copy_by_ref = 0;
9043 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9044 chk->rec.chunk_id.can_take_data = 0;
9045 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9046 chk->send_size = plen;
9047 chk->sent = SCTP_DATAGRAM_UNSENT;
9049 chk->asoc = &stcb->asoc;
9052 atomic_add_int(&chk->whoTo->ref_count, 1);
9053 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9054 chk->asoc->ctrl_queue_cnt++;
9059 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9063 struct sctp_nets *net)
9066 * take a HB request and make it into a HB ack and send it.
9068 struct mbuf *outchain;
9069 struct sctp_chunkhdr *chdr;
9070 struct sctp_tmit_chunk *chk;
9074 /* must have a net pointer */
9077 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9078 if (outchain == NULL) {
9079 /* gak out of memory */
9082 #ifdef SCTP_MBUF_LOGGING
9083 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9084 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9087 chdr = mtod(outchain, struct sctp_chunkhdr *);
9088 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9089 chdr->chunk_flags = 0;
9090 if (chk_length % 4) {
9092 uint32_t cpthis = 0;
9095 padlen = 4 - (chk_length % 4);
9096 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9098 sctp_alloc_a_chunk(stcb, chk);
9101 sctp_m_freem(outchain);
9104 chk->copy_by_ref = 0;
9105 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9106 chk->rec.chunk_id.can_take_data = 1;
9108 chk->send_size = chk_length;
9109 chk->sent = SCTP_DATAGRAM_UNSENT;
9111 chk->asoc = &stcb->asoc;
9112 chk->data = outchain;
9114 atomic_add_int(&chk->whoTo->ref_count, 1);
9115 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9116 chk->asoc->ctrl_queue_cnt++;
9120 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9122 /* formulate and queue a cookie-ack back to sender */
9123 struct mbuf *cookie_ack;
9124 struct sctp_chunkhdr *hdr;
9125 struct sctp_tmit_chunk *chk;
9127 SCTP_TCB_LOCK_ASSERT(stcb);
9129 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9130 if (cookie_ack == NULL) {
9134 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9135 sctp_alloc_a_chunk(stcb, chk);
9138 sctp_m_freem(cookie_ack);
9141 chk->copy_by_ref = 0;
9142 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9143 chk->rec.chunk_id.can_take_data = 1;
9145 chk->send_size = sizeof(struct sctp_chunkhdr);
9146 chk->sent = SCTP_DATAGRAM_UNSENT;
9148 chk->asoc = &stcb->asoc;
9149 chk->data = cookie_ack;
9150 if (chk->asoc->last_control_chunk_from != NULL) {
9151 chk->whoTo = chk->asoc->last_control_chunk_from;
9152 atomic_add_int(&chk->whoTo->ref_count, 1);
9156 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9157 hdr->chunk_type = SCTP_COOKIE_ACK;
9158 hdr->chunk_flags = 0;
9159 hdr->chunk_length = htons(chk->send_size);
9160 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9161 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9162 chk->asoc->ctrl_queue_cnt++;
9168 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9170 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9171 struct mbuf *m_shutdown_ack;
9172 struct sctp_shutdown_ack_chunk *ack_cp;
9173 struct sctp_tmit_chunk *chk;
9175 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9176 if (m_shutdown_ack == NULL) {
9180 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9181 sctp_alloc_a_chunk(stcb, chk);
9184 sctp_m_freem(m_shutdown_ack);
9187 chk->copy_by_ref = 0;
9188 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9189 chk->rec.chunk_id.can_take_data = 1;
9191 chk->send_size = sizeof(struct sctp_chunkhdr);
9192 chk->sent = SCTP_DATAGRAM_UNSENT;
9195 chk->asoc = &stcb->asoc;
9196 chk->data = m_shutdown_ack;
9199 atomic_add_int(&chk->whoTo->ref_count, 1);
9201 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9202 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9203 ack_cp->ch.chunk_flags = 0;
9204 ack_cp->ch.chunk_length = htons(chk->send_size);
9205 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9206 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9207 chk->asoc->ctrl_queue_cnt++;
9212 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9214 /* formulate and queue a SHUTDOWN to the sender */
9215 struct mbuf *m_shutdown;
9216 struct sctp_shutdown_chunk *shutdown_cp;
9217 struct sctp_tmit_chunk *chk;
9219 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9220 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9221 /* We already have a SHUTDOWN queued. Reuse it. */
9223 sctp_free_remote_addr(chk->whoTo);
9230 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9231 if (m_shutdown == NULL) {
9235 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9236 sctp_alloc_a_chunk(stcb, chk);
9239 sctp_m_freem(m_shutdown);
9242 chk->copy_by_ref = 0;
9243 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9244 chk->rec.chunk_id.can_take_data = 1;
9246 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9247 chk->sent = SCTP_DATAGRAM_UNSENT;
9250 chk->asoc = &stcb->asoc;
9251 chk->data = m_shutdown;
9254 atomic_add_int(&chk->whoTo->ref_count, 1);
9256 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9257 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9258 shutdown_cp->ch.chunk_flags = 0;
9259 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9260 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9261 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9262 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9263 chk->asoc->ctrl_queue_cnt++;
9265 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9268 atomic_add_int(&chk->whoTo->ref_count, 1);
9270 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9271 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9272 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9278 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9281 * formulate and queue an ASCONF to the peer. ASCONF parameters
9282 * should be queued on the assoc queue.
9284 struct sctp_tmit_chunk *chk;
9285 struct mbuf *m_asconf;
9288 SCTP_TCB_LOCK_ASSERT(stcb);
9290 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9291 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9292 /* can't send a new one if there is one in flight already */
9296 /* compose an ASCONF chunk, maximum length is PMTU */
9297 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9298 if (m_asconf == NULL) {
9302 sctp_alloc_a_chunk(stcb, chk);
9305 sctp_m_freem(m_asconf);
9309 chk->copy_by_ref = 0;
9310 chk->rec.chunk_id.id = SCTP_ASCONF;
9311 chk->rec.chunk_id.can_take_data = 0;
9312 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9313 chk->data = m_asconf;
9314 chk->send_size = len;
9315 chk->sent = SCTP_DATAGRAM_UNSENT;
9317 chk->asoc = &stcb->asoc;
9320 atomic_add_int(&chk->whoTo->ref_count, 1);
9322 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9323 chk->asoc->ctrl_queue_cnt++;
9328 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9331 * formulate and queue a asconf-ack back to sender. the asconf-ack
9332 * must be stored in the tcb.
9334 struct sctp_tmit_chunk *chk;
9335 struct sctp_asconf_ack *ack, *latest_ack;
9337 struct sctp_nets *net = NULL;
9339 SCTP_TCB_LOCK_ASSERT(stcb);
9340 /* Get the latest ASCONF-ACK */
9341 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9342 if (latest_ack == NULL) {
9345 if (latest_ack->last_sent_to != NULL &&
9346 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9347 /* we're doing a retransmission */
9348 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9351 if (stcb->asoc.last_control_chunk_from == NULL) {
9352 if (stcb->asoc.alternate) {
9353 net = stcb->asoc.alternate;
9355 net = stcb->asoc.primary_destination;
9358 net = stcb->asoc.last_control_chunk_from;
9363 if (stcb->asoc.last_control_chunk_from == NULL) {
9364 if (stcb->asoc.alternate) {
9365 net = stcb->asoc.alternate;
9367 net = stcb->asoc.primary_destination;
9370 net = stcb->asoc.last_control_chunk_from;
9373 latest_ack->last_sent_to = net;
9375 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9376 if (ack->data == NULL) {
9380 /* copy the asconf_ack */
9381 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9382 if (m_ack == NULL) {
9383 /* couldn't copy it */
9386 #ifdef SCTP_MBUF_LOGGING
9387 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9388 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9392 sctp_alloc_a_chunk(stcb, chk);
9396 sctp_m_freem(m_ack);
9399 chk->copy_by_ref = 0;
9400 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9401 chk->rec.chunk_id.can_take_data = 1;
9402 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9405 atomic_add_int(&chk->whoTo->ref_count, 1);
9408 chk->send_size = ack->len;
9409 chk->sent = SCTP_DATAGRAM_UNSENT;
9411 chk->asoc = &stcb->asoc;
9413 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9414 chk->asoc->ctrl_queue_cnt++;
9421 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9422 struct sctp_tcb *stcb,
9423 struct sctp_association *asoc,
9424 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9425 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9431 * send out one MTU of retransmission. If fast_retransmit is
9432 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9433 * rwnd. For a Cookie or Asconf in the control chunk queue we
9434 * retransmit them by themselves.
9436 * For data chunks we will pick out the lowest TSN's in the sent_queue
9437 * marked for resend and bundle them all together (up to a MTU of
9438 * destination). The address to send to should have been
9439 * selected/changed where the retransmission was marked (i.e. in FR
9440 * or t3-timeout routines).
9442 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9443 struct sctp_tmit_chunk *chk, *fwd;
9444 struct mbuf *m, *endofchain;
9445 struct sctp_nets *net = NULL;
9446 uint32_t tsns_sent = 0;
9447 int no_fragmentflg, bundle_at, cnt_thru;
9449 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9450 struct sctp_auth_chunk *auth = NULL;
9451 uint32_t auth_offset = 0;
9452 uint16_t auth_keyid;
9453 int override_ok = 1;
9454 int data_auth_reqd = 0;
9457 SCTP_TCB_LOCK_ASSERT(stcb);
9458 tmr_started = ctl_cnt = bundle_at = error = 0;
9463 endofchain = m = NULL;
9464 auth_keyid = stcb->asoc.authinfo.active_keyid;
9465 #ifdef SCTP_AUDITING_ENABLED
9466 sctp_audit_log(0xC3, 1);
9468 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9469 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9470 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9471 asoc->sent_queue_retran_cnt);
9472 asoc->sent_queue_cnt = 0;
9473 asoc->sent_queue_cnt_removeable = 0;
9474 /* send back 0/0 so we enter normal transmission */
9478 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9479 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9480 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9481 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9482 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9485 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9486 if (chk != asoc->str_reset) {
9488 * not eligible for retran if its
9495 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9499 * Add an AUTH chunk, if chunk requires it save the
9500 * offset into the chain for AUTH
9502 if ((auth == NULL) &&
9503 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9504 stcb->asoc.peer_auth_chunks))) {
9505 m = sctp_add_auth_chunk(m, &endofchain,
9506 &auth, &auth_offset,
9508 chk->rec.chunk_id.id);
9509 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9511 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9517 /* do we have control chunks to retransmit? */
9519 /* Start a timer no matter if we succeed or fail */
9520 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9521 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9522 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9523 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9524 chk->snd_count++; /* update our count */
9525 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9526 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9527 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9528 no_fragmentflg, 0, 0,
9529 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9530 chk->whoTo->port, NULL,
9533 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9534 if (error == ENOBUFS) {
9535 asoc->ifp_had_enobuf = 1;
9536 SCTP_STAT_INCR(sctps_lowlevelerr);
9540 asoc->ifp_had_enobuf = 0;
9546 * We don't want to mark the net->sent time here since this
9547 * we use this for HB and retrans cannot measure RTT
9549 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9551 chk->sent = SCTP_DATAGRAM_SENT;
9552 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9556 /* Clean up the fwd-tsn list */
9557 sctp_clean_up_ctl(stcb, asoc, so_locked);
9562 * Ok, it is just data retransmission we need to do or that and a
9563 * fwd-tsn with it all.
9565 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9566 return (SCTP_RETRAN_DONE);
9568 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9569 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9570 /* not yet open, resend the cookie and that is it */
9573 #ifdef SCTP_AUDITING_ENABLED
9574 sctp_auditing(20, inp, stcb, NULL);
9576 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9577 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9578 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9579 /* No, not sent to this net or not ready for rtx */
9582 if (chk->data == NULL) {
9583 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9584 chk->rec.data.tsn, chk->snd_count, chk->sent);
9587 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9588 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9589 struct mbuf *op_err;
9590 char msg[SCTP_DIAG_INFO_LEN];
9592 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9593 chk->rec.data.tsn, chk->snd_count);
9594 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9596 atomic_add_int(&stcb->asoc.refcnt, 1);
9597 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9599 SCTP_TCB_LOCK(stcb);
9600 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9601 return (SCTP_RETRAN_EXIT);
9603 /* pick up the net */
9605 switch (net->ro._l_addr.sa.sa_family) {
9608 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9613 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9622 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9623 /* No room in peers rwnd */
9626 tsn = asoc->last_acked_seq + 1;
9627 if (tsn == chk->rec.data.tsn) {
9629 * we make a special exception for this
9630 * case. The peer has no rwnd but is missing
9631 * the lowest chunk.. which is probably what
9632 * is holding up the rwnd.
9634 goto one_chunk_around;
9639 if (asoc->peers_rwnd < mtu) {
9641 if ((asoc->peers_rwnd == 0) &&
9642 (asoc->total_flight == 0)) {
9643 chk->window_probe = 1;
9644 chk->whoTo->window_probe = 1;
9647 #ifdef SCTP_AUDITING_ENABLED
9648 sctp_audit_log(0xC3, 2);
9652 net->fast_retran_ip = 0;
9653 if (chk->rec.data.doing_fast_retransmit == 0) {
9655 * if no FR in progress skip destination that have
9656 * flight_size > cwnd.
9658 if (net->flight_size >= net->cwnd) {
9663 * Mark the destination net to have FR recovery
9667 net->fast_retran_ip = 1;
9671 * if no AUTH is yet included and this chunk requires it,
9672 * make sure to account for it. We don't apply the size
9673 * until the AUTH chunk is actually added below in case
9674 * there is no room for this chunk.
9676 if (data_auth_reqd && (auth == NULL)) {
9677 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9681 if ((chk->send_size <= (mtu - dmtu)) ||
9682 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9683 /* ok we will add this one */
9684 if (data_auth_reqd) {
9686 m = sctp_add_auth_chunk(m,
9692 auth_keyid = chk->auth_keyid;
9694 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9695 } else if (override_ok) {
9696 auth_keyid = chk->auth_keyid;
9698 } else if (chk->auth_keyid != auth_keyid) {
9699 /* different keyid, so done bundling */
9703 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9705 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9708 /* Do clear IP_DF ? */
9709 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9712 /* upate our MTU size */
9713 if (mtu > (chk->send_size + dmtu))
9714 mtu -= (chk->send_size + dmtu);
9717 data_list[bundle_at++] = chk;
9718 if (one_chunk && (asoc->total_flight <= 0)) {
9719 SCTP_STAT_INCR(sctps_windowprobed);
9722 if (one_chunk == 0) {
9724 * now are there anymore forward from chk to pick
9727 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9728 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9729 /* Nope, not for retran */
9732 if (fwd->whoTo != net) {
9733 /* Nope, not the net in question */
9736 if (data_auth_reqd && (auth == NULL)) {
9737 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9740 if (fwd->send_size <= (mtu - dmtu)) {
9741 if (data_auth_reqd) {
9743 m = sctp_add_auth_chunk(m,
9749 auth_keyid = fwd->auth_keyid;
9751 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9752 } else if (override_ok) {
9753 auth_keyid = fwd->auth_keyid;
9755 } else if (fwd->auth_keyid != auth_keyid) {
9763 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9765 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9768 /* Do clear IP_DF ? */
9769 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9772 /* upate our MTU size */
9773 if (mtu > (fwd->send_size + dmtu))
9774 mtu -= (fwd->send_size + dmtu);
9777 data_list[bundle_at++] = fwd;
9778 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9782 /* can't fit so we are done */
9787 /* Is there something to send for this destination? */
9790 * No matter if we fail/or succeed we should start a
9791 * timer. A failure is like a lost IP packet :-)
9793 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9795 * no timer running on this destination
9798 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9801 /* Now lets send it, if there is anything to send :> */
9802 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9803 (struct sockaddr *)&net->ro._l_addr, m,
9804 auth_offset, auth, auth_keyid,
9805 no_fragmentflg, 0, 0,
9806 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9810 /* error, we could not output */
9811 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9812 if (error == ENOBUFS) {
9813 asoc->ifp_had_enobuf = 1;
9814 SCTP_STAT_INCR(sctps_lowlevelerr);
9818 asoc->ifp_had_enobuf = 0;
9825 * We don't want to mark the net->sent time here
9826 * since this we use this for HB and retrans cannot
9829 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9831 /* For auto-close */
9833 if (*now_filled == 0) {
9834 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9835 *now = asoc->time_last_sent;
9838 asoc->time_last_sent = *now;
9840 *cnt_out += bundle_at;
9841 #ifdef SCTP_AUDITING_ENABLED
9842 sctp_audit_log(0xC4, bundle_at);
9845 tsns_sent = data_list[0]->rec.data.tsn;
9847 for (i = 0; i < bundle_at; i++) {
9848 SCTP_STAT_INCR(sctps_sendretransdata);
9849 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9851 * When we have a revoked data, and we
9852 * retransmit it, then we clear the revoked
9853 * flag since this flag dictates if we
9854 * subtracted from the fs
9856 if (data_list[i]->rec.data.chunk_was_revoked) {
9857 /* Deflate the cwnd */
9858 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9859 data_list[i]->rec.data.chunk_was_revoked = 0;
9861 data_list[i]->snd_count++;
9862 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9863 /* record the time */
9864 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9865 if (data_list[i]->book_size_scale) {
9867 * need to double the book size on
9870 data_list[i]->book_size_scale = 0;
9872 * Since we double the booksize, we
9873 * must also double the output queue
9874 * size, since this get shrunk when
9875 * we free by this amount.
9877 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9878 data_list[i]->book_size *= 2;
9882 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9883 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9884 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9886 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9887 (uint32_t)(data_list[i]->send_size +
9888 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9890 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9891 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9892 data_list[i]->whoTo->flight_size,
9893 data_list[i]->book_size,
9894 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9895 data_list[i]->rec.data.tsn);
9897 sctp_flight_size_increase(data_list[i]);
9898 sctp_total_flight_increase(stcb, data_list[i]);
9899 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9900 /* SWS sender side engages */
9901 asoc->peers_rwnd = 0;
9904 (data_list[i]->rec.data.doing_fast_retransmit)) {
9905 SCTP_STAT_INCR(sctps_sendfastretrans);
9906 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9907 (tmr_started == 0)) {
9909 * ok we just fast-retrans'd
9910 * the lowest TSN, i.e the
9911 * first on the list. In
9912 * this case we want to give
9913 * some more time to get a
9914 * SACK back without a
9917 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9918 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9919 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9923 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9924 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9926 #ifdef SCTP_AUDITING_ENABLED
9927 sctp_auditing(21, inp, stcb, NULL);
9933 if (asoc->sent_queue_retran_cnt <= 0) {
9934 /* all done we have no more to retran */
9935 asoc->sent_queue_retran_cnt = 0;
9939 /* No more room in rwnd */
9942 /* stop the for loop here. we sent out a packet */
9949 sctp_timer_validation(struct sctp_inpcb *inp,
9950 struct sctp_tcb *stcb,
9951 struct sctp_association *asoc)
9953 struct sctp_nets *net;
9955 /* Validate that a timer is running somewhere */
9956 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9957 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9958 /* Here is a timer */
9962 SCTP_TCB_LOCK_ASSERT(stcb);
9963 /* Gak, we did not have a timer somewhere */
9964 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9965 if (asoc->alternate) {
9966 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9968 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9974 sctp_chunk_output(struct sctp_inpcb *inp,
9975 struct sctp_tcb *stcb,
9978 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9984 * Ok this is the generic chunk service queue. we must do the
9986 * - See if there are retransmits pending, if so we must
9988 * - Service the stream queue that is next, moving any
9989 * message (note I must get a complete message i.e.
9990 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9992 * - Check to see if the cwnd/rwnd allows any output, if so we
9993 * go ahead and fomulate and send the low level chunks. Making sure
9994 * to combine any control in the control chunk queue also.
9996 struct sctp_association *asoc;
9997 struct sctp_nets *net;
9998 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9999 unsigned int burst_cnt = 0;
10000 struct timeval now;
10001 int now_filled = 0;
10003 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10006 unsigned int tot_frs = 0;
10008 asoc = &stcb->asoc;
10010 /* The Nagle algorithm is only applied when handling a send call. */
10011 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10012 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10020 SCTP_TCB_LOCK_ASSERT(stcb);
10022 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10024 if ((un_sent <= 0) &&
10025 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10026 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10027 (asoc->sent_queue_retran_cnt == 0) &&
10028 (asoc->trigger_reset == 0)) {
10029 /* Nothing to do unless there is something to be sent left */
10033 * Do we have something to send, data or control AND a sack timer
10034 * running, if so piggy-back the sack.
10036 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10037 sctp_send_sack(stcb, so_locked);
10038 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10040 while (asoc->sent_queue_retran_cnt) {
10042 * Ok, it is retransmission time only, we send out only ONE
10043 * packet with a single call off to the retran code.
10045 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10047 * Special hook for handling cookiess discarded
10048 * by peer that carried data. Send cookie-ack only
10049 * and then the next call with get the retran's.
10051 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10053 &now, &now_filled, frag_point, so_locked);
10055 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10056 /* if its not from a HB then do it */
10058 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10064 * its from any other place, we don't allow retran
10065 * output (only control)
10070 /* Can't send anymore */
10072 * now lets push out control by calling med-level
10073 * output once. this assures that we WILL send HB's
10076 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10078 &now, &now_filled, frag_point, so_locked);
10079 #ifdef SCTP_AUDITING_ENABLED
10080 sctp_auditing(8, inp, stcb, NULL);
10082 sctp_timer_validation(inp, stcb, asoc);
10087 * The count was off.. retran is not happening so do
10088 * the normal retransmission.
10090 #ifdef SCTP_AUDITING_ENABLED
10091 sctp_auditing(9, inp, stcb, NULL);
10093 if (ret == SCTP_RETRAN_EXIT) {
10098 if (from_where == SCTP_OUTPUT_FROM_T3) {
10099 /* Only one transmission allowed out of a timeout */
10100 #ifdef SCTP_AUDITING_ENABLED
10101 sctp_auditing(10, inp, stcb, NULL);
10103 /* Push out any control */
10104 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10105 &now, &now_filled, frag_point, so_locked);
10108 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10109 /* Hit FR burst limit */
10112 if ((num_out == 0) && (ret == 0)) {
10113 /* No more retrans to send */
10117 #ifdef SCTP_AUDITING_ENABLED
10118 sctp_auditing(12, inp, stcb, NULL);
10120 /* Check for bad destinations, if they exist move chunks around. */
10121 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10122 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10124 * if possible move things off of this address we
10125 * still may send below due to the dormant state but
10126 * we try to find an alternate address to send to
10127 * and if we have one we move all queued data on the
10128 * out wheel to this alternate address.
10130 if (net->ref_count > 1)
10131 sctp_move_chunks_from_net(stcb, net);
10134 * if ((asoc->sat_network) || (net->addr_is_local))
10135 * { burst_limit = asoc->max_burst *
10136 * SCTP_SAT_NETWORK_BURST_INCR; }
10138 if (asoc->max_burst > 0) {
10139 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10140 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10142 * JRS - Use the congestion
10143 * control given in the
10144 * congestion control module
10146 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10147 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10148 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10150 SCTP_STAT_INCR(sctps_maxburstqueued);
10152 net->fast_retran_ip = 0;
10154 if (net->flight_size == 0) {
10156 * Should be decaying the
10168 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10169 &reason_code, 0, from_where,
10170 &now, &now_filled, frag_point, so_locked);
10172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10173 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10174 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10176 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10177 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10178 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10182 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10184 tot_out += num_out;
10186 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10187 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10188 if (num_out == 0) {
10189 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10194 * When the Nagle algorithm is used, look at how
10195 * much is unsent, then if its smaller than an MTU
10196 * and we have data in flight we stop, except if we
10197 * are handling a fragmented user message.
10199 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10200 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10201 (stcb->asoc.total_flight > 0)) {
10202 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10206 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10207 TAILQ_EMPTY(&asoc->send_queue) &&
10208 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10209 /* Nothing left to send */
10212 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10213 /* Nothing left to send */
10216 } while (num_out &&
10217 ((asoc->max_burst == 0) ||
10218 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10219 (burst_cnt < asoc->max_burst)));
10221 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10222 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10223 SCTP_STAT_INCR(sctps_maxburstqueued);
10224 asoc->burst_limit_applied = 1;
10225 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10226 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10229 asoc->burst_limit_applied = 0;
10232 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10233 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10235 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10239 * Now we need to clean up the control chunk chain if a ECNE is on
10240 * it. It must be marked as UNSENT again so next call will continue
10241 * to send it until such time that we get a CWR, to remove it.
10243 if (stcb->asoc.ecn_echo_cnt_onq)
10244 sctp_fix_ecn_echo(asoc);
10246 if (stcb->asoc.trigger_reset) {
10247 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10257 struct sctp_inpcb *inp,
10259 struct sockaddr *addr,
10260 struct mbuf *control,
10265 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10269 if (inp->sctp_socket == NULL) {
10270 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10273 return (sctp_sosend(inp->sctp_socket,
10275 (struct uio *)NULL,
10283 send_forward_tsn(struct sctp_tcb *stcb,
10284 struct sctp_association *asoc)
10286 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10287 struct sctp_forward_tsn_chunk *fwdtsn;
10288 struct sctp_strseq *strseq;
10289 struct sctp_strseq_mid *strseq_m;
10290 uint32_t advance_peer_ack_point;
10291 unsigned int cnt_of_space, i, ovh;
10292 unsigned int space_needed;
10293 unsigned int cnt_of_skipped = 0;
10295 SCTP_TCB_LOCK_ASSERT(stcb);
10296 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10297 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10298 /* mark it to unsent */
10299 chk->sent = SCTP_DATAGRAM_UNSENT;
10300 chk->snd_count = 0;
10301 /* Do we correct its output location? */
10303 sctp_free_remote_addr(chk->whoTo);
10306 goto sctp_fill_in_rest;
10309 /* Ok if we reach here we must build one */
10310 sctp_alloc_a_chunk(stcb, chk);
10314 asoc->fwd_tsn_cnt++;
10315 chk->copy_by_ref = 0;
10317 * We don't do the old thing here since this is used not for on-wire
10318 * but to tell if we are sending a fwd-tsn by the stack during
10319 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10321 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10322 chk->rec.chunk_id.can_take_data = 0;
10326 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10327 if (chk->data == NULL) {
10328 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10331 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10332 chk->sent = SCTP_DATAGRAM_UNSENT;
10333 chk->snd_count = 0;
10334 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10335 asoc->ctrl_queue_cnt++;
10338 * Here we go through and fill out the part that deals with
10339 * stream/seq of the ones we skip.
10341 SCTP_BUF_LEN(chk->data) = 0;
10342 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10343 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10344 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10345 /* no more to look at */
10348 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10349 /* We don't report these */
10354 if (asoc->idata_supported) {
10355 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10356 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10358 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10359 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10361 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10363 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10364 ovh = SCTP_MIN_OVERHEAD;
10366 ovh = SCTP_MIN_V4_OVERHEAD;
10368 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10369 /* trim to a mtu size */
10370 cnt_of_space = asoc->smallest_mtu - ovh;
10372 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10373 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10374 0xff, 0, cnt_of_skipped,
10375 asoc->advanced_peer_ack_point);
10377 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10378 if (cnt_of_space < space_needed) {
10380 * ok we must trim down the chunk by lowering the
10381 * advance peer ack point.
10383 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10384 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10385 0xff, 0xff, cnt_of_space,
10388 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10389 if (asoc->idata_supported) {
10390 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10392 cnt_of_skipped /= sizeof(struct sctp_strseq);
10395 * Go through and find the TSN that will be the one
10398 at = TAILQ_FIRST(&asoc->sent_queue);
10400 for (i = 0; i < cnt_of_skipped; i++) {
10401 tp1 = TAILQ_NEXT(at, sctp_next);
10408 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10409 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10410 0xff, cnt_of_skipped, at->rec.data.tsn,
10411 asoc->advanced_peer_ack_point);
10415 * last now points to last one I can report, update
10419 advance_peer_ack_point = last->rec.data.tsn;
10421 if (asoc->idata_supported) {
10422 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10423 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10425 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10426 cnt_of_skipped * sizeof(struct sctp_strseq);
10429 chk->send_size = space_needed;
10430 /* Setup the chunk */
10431 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10432 fwdtsn->ch.chunk_length = htons(chk->send_size);
10433 fwdtsn->ch.chunk_flags = 0;
10434 if (asoc->idata_supported) {
10435 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10437 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10439 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10440 SCTP_BUF_LEN(chk->data) = chk->send_size;
10443 * Move pointer to after the fwdtsn and transfer to the
10446 if (asoc->idata_supported) {
10447 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10450 strseq = (struct sctp_strseq *)fwdtsn;
10454 * Now populate the strseq list. This is done blindly
10455 * without pulling out duplicate stream info. This is
10456 * inefficent but won't harm the process since the peer will
10457 * look at these in sequence and will thus release anything.
10458 * It could mean we exceed the PMTU and chop off some that
10459 * we could have included.. but this is unlikely (aka 1432/4
10460 * would mean 300+ stream seq's would have to be reported in
10461 * one FWD-TSN. With a bit of work we can later FIX this to
10462 * optimize and pull out duplicates.. but it does add more
10463 * overhead. So for now... not!
10466 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10467 if (i >= cnt_of_skipped) {
10470 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10471 /* We don't report these */
10474 if (at->rec.data.tsn == advance_peer_ack_point) {
10475 at->rec.data.fwd_tsn_cnt = 0;
10477 if (asoc->idata_supported) {
10478 strseq_m->sid = htons(at->rec.data.sid);
10479 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10480 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10482 strseq_m->flags = 0;
10484 strseq_m->mid = htonl(at->rec.data.mid);
10487 strseq->sid = htons(at->rec.data.sid);
10488 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10497 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10498 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10504 * Queue up a SACK or NR-SACK in the control queue.
10505 * We must first check to see if a SACK or NR-SACK is
10506 * somehow on the control queue.
10507 * If so, we will take and and remove the old one.
10509 struct sctp_association *asoc;
10510 struct sctp_tmit_chunk *chk, *a_chk;
10511 struct sctp_sack_chunk *sack;
10512 struct sctp_nr_sack_chunk *nr_sack;
10513 struct sctp_gap_ack_block *gap_descriptor;
10514 const struct sack_track *selector;
10519 int limit_reached = 0;
10520 unsigned int i, siz, j;
10521 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10524 uint32_t highest_tsn;
10529 if (stcb->asoc.nrsack_supported == 1) {
10530 type = SCTP_NR_SELECTIVE_ACK;
10532 type = SCTP_SELECTIVE_ACK;
10535 asoc = &stcb->asoc;
10536 SCTP_TCB_LOCK_ASSERT(stcb);
10537 if (asoc->last_data_chunk_from == NULL) {
10538 /* Hmm we never received anything */
10541 sctp_slide_mapping_arrays(stcb);
10542 sctp_set_rwnd(stcb, asoc);
10543 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10544 if (chk->rec.chunk_id.id == type) {
10545 /* Hmm, found a sack already on queue, remove it */
10546 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10547 asoc->ctrl_queue_cnt--;
10550 sctp_m_freem(a_chk->data);
10551 a_chk->data = NULL;
10553 if (a_chk->whoTo) {
10554 sctp_free_remote_addr(a_chk->whoTo);
10555 a_chk->whoTo = NULL;
10560 if (a_chk == NULL) {
10561 sctp_alloc_a_chunk(stcb, a_chk);
10562 if (a_chk == NULL) {
10563 /* No memory so we drop the idea, and set a timer */
10564 if (stcb->asoc.delayed_ack) {
10565 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10566 stcb->sctp_ep, stcb, NULL,
10567 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10568 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10569 stcb->sctp_ep, stcb, NULL);
10571 stcb->asoc.send_sack = 1;
10575 a_chk->copy_by_ref = 0;
10576 a_chk->rec.chunk_id.id = type;
10577 a_chk->rec.chunk_id.can_take_data = 1;
10579 /* Clear our pkt counts */
10580 asoc->data_pkts_seen = 0;
10583 a_chk->asoc = asoc;
10584 a_chk->snd_count = 0;
10585 a_chk->send_size = 0; /* fill in later */
10586 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10587 a_chk->whoTo = NULL;
10589 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10591 * Ok, the destination for the SACK is unreachable, lets see if
10592 * we can select an alternate to asoc->last_data_chunk_from
10594 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10595 if (a_chk->whoTo == NULL) {
10596 /* Nope, no alternate */
10597 a_chk->whoTo = asoc->last_data_chunk_from;
10600 a_chk->whoTo = asoc->last_data_chunk_from;
10602 if (a_chk->whoTo) {
10603 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10605 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10606 highest_tsn = asoc->highest_tsn_inside_map;
10608 highest_tsn = asoc->highest_tsn_inside_nr_map;
10610 if (highest_tsn == asoc->cumulative_tsn) {
10612 if (type == SCTP_SELECTIVE_ACK) {
10613 space_req = sizeof(struct sctp_sack_chunk);
10615 space_req = sizeof(struct sctp_nr_sack_chunk);
10618 /* gaps get a cluster */
10619 space_req = MCLBYTES;
10621 /* Ok now lets formulate a MBUF with our sack */
10622 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10623 if ((a_chk->data == NULL) ||
10624 (a_chk->whoTo == NULL)) {
10625 /* rats, no mbuf memory */
10627 /* was a problem with the destination */
10628 sctp_m_freem(a_chk->data);
10629 a_chk->data = NULL;
10631 sctp_free_a_chunk(stcb, a_chk, so_locked);
10632 /* sa_ignore NO_NULL_CHK */
10633 if (stcb->asoc.delayed_ack) {
10634 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10635 stcb->sctp_ep, stcb, NULL,
10636 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10637 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10638 stcb->sctp_ep, stcb, NULL);
10640 stcb->asoc.send_sack = 1;
10644 /* ok, lets go through and fill it in */
10645 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10646 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10647 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10648 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10650 limit = mtod(a_chk->data, caddr_t);
10655 if ((asoc->sctp_cmt_on_off > 0) &&
10656 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10658 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10659 * received, then set high bit to 1, else 0. Reset
10662 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10663 asoc->cmt_dac_pkts_rcvd = 0;
10665 #ifdef SCTP_ASOCLOG_OF_TSNS
10666 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10667 stcb->asoc.cumack_log_atsnt++;
10668 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10669 stcb->asoc.cumack_log_atsnt = 0;
10672 /* reset the readers interpretation */
10673 stcb->freed_by_sorcv_sincelast = 0;
10675 if (type == SCTP_SELECTIVE_ACK) {
10676 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10678 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10679 if (highest_tsn > asoc->mapping_array_base_tsn) {
10680 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10682 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10686 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10687 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10688 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10689 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10691 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10695 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10698 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10700 if (((type == SCTP_SELECTIVE_ACK) &&
10701 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10702 ((type == SCTP_NR_SELECTIVE_ACK) &&
10703 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10704 /* we have a gap .. maybe */
10705 for (i = 0; i < siz; i++) {
10706 tsn_map = asoc->mapping_array[i];
10707 if (type == SCTP_SELECTIVE_ACK) {
10708 tsn_map |= asoc->nr_mapping_array[i];
10712 * Clear all bits corresponding to TSNs
10713 * smaller or equal to the cumulative TSN.
10715 tsn_map &= (~0U << (1 - offset));
10717 selector = &sack_array[tsn_map];
10718 if (mergeable && selector->right_edge) {
10720 * Backup, left and right edges were ok to
10726 if (selector->num_entries == 0)
10729 for (j = 0; j < selector->num_entries; j++) {
10730 if (mergeable && selector->right_edge) {
10732 * do a merge by NOT setting
10738 * no merge, set the left
10742 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10744 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10747 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10753 if (selector->left_edge) {
10757 if (limit_reached) {
10758 /* Reached the limit stop */
10764 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10765 (limit_reached == 0)) {
10769 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10770 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10772 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10775 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10778 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10780 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10781 /* we have a gap .. maybe */
10782 for (i = 0; i < siz; i++) {
10783 tsn_map = asoc->nr_mapping_array[i];
10786 * Clear all bits corresponding to
10787 * TSNs smaller or equal to the
10790 tsn_map &= (~0U << (1 - offset));
10792 selector = &sack_array[tsn_map];
10793 if (mergeable && selector->right_edge) {
10795 * Backup, left and right edges were
10798 num_nr_gap_blocks--;
10801 if (selector->num_entries == 0)
10804 for (j = 0; j < selector->num_entries; j++) {
10805 if (mergeable && selector->right_edge) {
10807 * do a merge by NOT
10814 * no merge, set the
10818 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10820 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10821 num_nr_gap_blocks++;
10823 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10829 if (selector->left_edge) {
10833 if (limit_reached) {
10834 /* Reached the limit stop */
10841 /* now we must add any dups we are going to report. */
10842 if ((limit_reached == 0) && (asoc->numduptsns)) {
10843 dup = (uint32_t *)gap_descriptor;
10844 for (i = 0; i < asoc->numduptsns; i++) {
10845 *dup = htonl(asoc->dup_tsns[i]);
10848 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10853 asoc->numduptsns = 0;
10856 * now that the chunk is prepared queue it to the control chunk
10859 if (type == SCTP_SELECTIVE_ACK) {
10860 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10861 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10862 num_dups * sizeof(int32_t));
10863 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10864 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10865 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10866 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10867 sack->sack.num_dup_tsns = htons(num_dups);
10868 sack->ch.chunk_type = type;
10869 sack->ch.chunk_flags = flags;
10870 sack->ch.chunk_length = htons(a_chk->send_size);
10872 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10873 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10874 num_dups * sizeof(int32_t));
10875 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10876 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10877 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10878 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10879 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10880 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10881 nr_sack->nr_sack.reserved = 0;
10882 nr_sack->ch.chunk_type = type;
10883 nr_sack->ch.chunk_flags = flags;
10884 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10886 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10887 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10888 asoc->ctrl_queue_cnt++;
10889 asoc->send_sack = 0;
10890 SCTP_STAT_INCR(sctps_sendsacks);
10895 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10896 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10901 struct mbuf *m_abort, *m, *m_last;
10902 struct mbuf *m_out, *m_end = NULL;
10903 struct sctp_abort_chunk *abort;
10904 struct sctp_auth_chunk *auth = NULL;
10905 struct sctp_nets *net;
10907 uint32_t auth_offset = 0;
10909 uint16_t cause_len, chunk_len, padding_len;
10911 SCTP_TCB_LOCK_ASSERT(stcb);
10913 * Add an AUTH chunk, if chunk requires it and save the offset into
10914 * the chain for AUTH
10916 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10917 stcb->asoc.peer_auth_chunks)) {
10918 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10919 stcb, SCTP_ABORT_ASSOCIATION);
10920 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10924 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10925 if (m_abort == NULL) {
10927 sctp_m_freem(m_out);
10930 sctp_m_freem(operr);
10934 /* link in any error */
10935 SCTP_BUF_NEXT(m_abort) = operr;
10938 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10939 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10940 if (SCTP_BUF_NEXT(m) == NULL) {
10944 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10945 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10946 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10947 if (m_out == NULL) {
10948 /* NO Auth chunk prepended, so reserve space in front */
10949 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10952 /* Put AUTH chunk at the front of the chain */
10953 SCTP_BUF_NEXT(m_end) = m_abort;
10955 if (stcb->asoc.alternate) {
10956 net = stcb->asoc.alternate;
10958 net = stcb->asoc.primary_destination;
10960 /* Fill in the ABORT chunk header. */
10961 abort = mtod(m_abort, struct sctp_abort_chunk *);
10962 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10963 if (stcb->asoc.peer_vtag == 0) {
10964 /* This happens iff the assoc is in COOKIE-WAIT state. */
10965 vtag = stcb->asoc.my_vtag;
10966 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10968 vtag = stcb->asoc.peer_vtag;
10969 abort->ch.chunk_flags = 0;
10971 abort->ch.chunk_length = htons(chunk_len);
10972 /* Add padding, if necessary. */
10973 if (padding_len > 0) {
10974 if ((m_last == NULL) ||
10975 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10976 sctp_m_freem(m_out);
10980 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10981 (struct sockaddr *)&net->ro._l_addr,
10982 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10983 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10984 stcb->asoc.primary_destination->port, NULL,
10987 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10988 if (error == ENOBUFS) {
10989 stcb->asoc.ifp_had_enobuf = 1;
10990 SCTP_STAT_INCR(sctps_lowlevelerr);
10993 stcb->asoc.ifp_had_enobuf = 0;
10995 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10999 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11000 struct sctp_nets *net,
11003 /* formulate and SEND a SHUTDOWN-COMPLETE */
11004 struct mbuf *m_shutdown_comp;
11005 struct sctp_shutdown_complete_chunk *shutdown_complete;
11010 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11011 if (m_shutdown_comp == NULL) {
11015 if (reflect_vtag) {
11016 flags = SCTP_HAD_NO_TCB;
11017 vtag = stcb->asoc.my_vtag;
11020 vtag = stcb->asoc.peer_vtag;
11022 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11023 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11024 shutdown_complete->ch.chunk_flags = flags;
11025 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11026 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11027 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11028 (struct sockaddr *)&net->ro._l_addr,
11029 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11030 stcb->sctp_ep->sctp_lport, stcb->rport,
11034 SCTP_SO_NOT_LOCKED))) {
11035 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11036 if (error == ENOBUFS) {
11037 stcb->asoc.ifp_had_enobuf = 1;
11038 SCTP_STAT_INCR(sctps_lowlevelerr);
11041 stcb->asoc.ifp_had_enobuf = 0;
11043 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11048 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11049 struct sctphdr *sh, uint32_t vtag,
11050 uint8_t type, struct mbuf *cause,
11051 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11052 uint32_t vrf_id, uint16_t port)
11054 struct mbuf *o_pak;
11056 struct sctphdr *shout;
11057 struct sctp_chunkhdr *ch;
11058 #if defined(INET) || defined(INET6)
11059 struct udphdr *udp;
11061 int ret, len, cause_len, padding_len;
11063 struct sockaddr_in *src_sin, *dst_sin;
11067 struct sockaddr_in6 *src_sin6, *dst_sin6;
11068 struct ip6_hdr *ip6;
11071 /* Compute the length of the cause and add final padding. */
11073 if (cause != NULL) {
11074 struct mbuf *m_at, *m_last = NULL;
11076 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11077 if (SCTP_BUF_NEXT(m_at) == NULL)
11079 cause_len += SCTP_BUF_LEN(m_at);
11081 padding_len = cause_len % 4;
11082 if (padding_len != 0) {
11083 padding_len = 4 - padding_len;
11085 if (padding_len != 0) {
11086 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11087 sctp_m_freem(cause);
11094 /* Get an mbuf for the header. */
11095 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11096 switch (dst->sa_family) {
11099 len += sizeof(struct ip);
11104 len += sizeof(struct ip6_hdr);
11110 #if defined(INET) || defined(INET6)
11112 len += sizeof(struct udphdr);
11115 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11116 if (mout == NULL) {
11118 sctp_m_freem(cause);
11122 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11123 SCTP_BUF_LEN(mout) = len;
11124 SCTP_BUF_NEXT(mout) = cause;
11125 M_SETFIB(mout, fibnum);
11126 mout->m_pkthdr.flowid = mflowid;
11127 M_HASHTYPE_SET(mout, mflowtype);
11134 switch (dst->sa_family) {
11137 src_sin = (struct sockaddr_in *)src;
11138 dst_sin = (struct sockaddr_in *)dst;
11139 ip = mtod(mout, struct ip *);
11140 ip->ip_v = IPVERSION;
11141 ip->ip_hl = (sizeof(struct ip) >> 2);
11143 ip->ip_off = htons(IP_DF);
11145 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11147 ip->ip_p = IPPROTO_UDP;
11149 ip->ip_p = IPPROTO_SCTP;
11151 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11152 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11154 len = sizeof(struct ip);
11155 shout = (struct sctphdr *)((caddr_t)ip + len);
11160 src_sin6 = (struct sockaddr_in6 *)src;
11161 dst_sin6 = (struct sockaddr_in6 *)dst;
11162 ip6 = mtod(mout, struct ip6_hdr *);
11163 ip6->ip6_flow = htonl(0x60000000);
11164 if (V_ip6_auto_flowlabel) {
11165 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11167 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11169 ip6->ip6_nxt = IPPROTO_UDP;
11171 ip6->ip6_nxt = IPPROTO_SCTP;
11173 ip6->ip6_src = dst_sin6->sin6_addr;
11174 ip6->ip6_dst = src_sin6->sin6_addr;
11175 len = sizeof(struct ip6_hdr);
11176 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11181 shout = mtod(mout, struct sctphdr *);
11184 #if defined(INET) || defined(INET6)
11186 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11187 sctp_m_freem(mout);
11190 udp = (struct udphdr *)shout;
11191 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11192 udp->uh_dport = port;
11194 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11195 sizeof(struct sctphdr) +
11196 sizeof(struct sctp_chunkhdr) +
11197 cause_len + padding_len));
11198 len += sizeof(struct udphdr);
11199 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11204 shout->src_port = sh->dest_port;
11205 shout->dest_port = sh->src_port;
11206 shout->checksum = 0;
11208 shout->v_tag = htonl(vtag);
11210 shout->v_tag = sh->v_tag;
11212 len += sizeof(struct sctphdr);
11213 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11214 ch->chunk_type = type;
11216 ch->chunk_flags = 0;
11218 ch->chunk_flags = SCTP_HAD_NO_TCB;
11220 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11221 len += sizeof(struct sctp_chunkhdr);
11222 len += cause_len + padding_len;
11224 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11225 sctp_m_freem(mout);
11228 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11229 switch (dst->sa_family) {
11234 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11239 ip->ip_len = htons(len);
11241 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11242 SCTP_STAT_INCR(sctps_sendswcrc);
11244 SCTP_ENABLE_UDP_CSUM(o_pak);
11247 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11248 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11249 SCTP_STAT_INCR(sctps_sendhwcrc);
11251 #ifdef SCTP_PACKET_LOGGING
11252 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11253 sctp_packet_log(o_pak);
11256 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11261 ip6->ip6_plen = htons(len - sizeof(struct ip6_hdr));
11263 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11264 SCTP_STAT_INCR(sctps_sendswcrc);
11265 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11266 udp->uh_sum = 0xffff;
11269 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11270 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11271 SCTP_STAT_INCR(sctps_sendhwcrc);
11273 #ifdef SCTP_PACKET_LOGGING
11274 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11275 sctp_packet_log(o_pak);
11278 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11282 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11284 sctp_m_freem(mout);
11285 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11288 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
11289 SCTP_STAT_INCR(sctps_sendpackets);
11290 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11291 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11293 SCTP_STAT_INCR(sctps_senderrors);
11299 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11300 struct sctphdr *sh,
11301 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11302 uint32_t vrf_id, uint16_t port)
11304 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11305 mflowtype, mflowid, fibnum,
11310 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11311 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11316 struct sctp_tmit_chunk *chk;
11317 struct sctp_heartbeat_chunk *hb;
11318 struct timeval now;
11320 SCTP_TCB_LOCK_ASSERT(stcb);
11324 (void)SCTP_GETTIME_TIMEVAL(&now);
11325 switch (net->ro._l_addr.sa.sa_family) {
11337 sctp_alloc_a_chunk(stcb, chk);
11339 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11343 chk->copy_by_ref = 0;
11344 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11345 chk->rec.chunk_id.can_take_data = 1;
11347 chk->asoc = &stcb->asoc;
11348 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11350 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11351 if (chk->data == NULL) {
11352 sctp_free_a_chunk(stcb, chk, so_locked);
11355 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11356 SCTP_BUF_LEN(chk->data) = chk->send_size;
11357 chk->sent = SCTP_DATAGRAM_UNSENT;
11358 chk->snd_count = 0;
11360 atomic_add_int(&chk->whoTo->ref_count, 1);
11361 /* Now we have a mbuf that we can fill in with the details */
11362 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11363 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11364 /* fill out chunk header */
11365 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11366 hb->ch.chunk_flags = 0;
11367 hb->ch.chunk_length = htons(chk->send_size);
11368 /* Fill out hb parameter */
11369 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11370 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11371 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11372 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11373 /* Did our user request this one, put it in */
11374 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11375 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11376 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11378 * we only take from the entropy pool if the address is not
11381 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11382 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11384 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11385 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11387 switch (net->ro._l_addr.sa.sa_family) {
11390 memcpy(hb->heartbeat.hb_info.address,
11391 &net->ro._l_addr.sin.sin_addr,
11392 sizeof(net->ro._l_addr.sin.sin_addr));
11397 memcpy(hb->heartbeat.hb_info.address,
11398 &net->ro._l_addr.sin6.sin6_addr,
11399 sizeof(net->ro._l_addr.sin6.sin6_addr));
11404 sctp_m_freem(chk->data);
11407 sctp_free_a_chunk(stcb, chk, so_locked);
11411 net->hb_responded = 0;
11412 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11413 stcb->asoc.ctrl_queue_cnt++;
11414 SCTP_STAT_INCR(sctps_sendheartbeat);
11419 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11422 struct sctp_association *asoc;
11423 struct sctp_ecne_chunk *ecne;
11424 struct sctp_tmit_chunk *chk;
11429 asoc = &stcb->asoc;
11430 SCTP_TCB_LOCK_ASSERT(stcb);
11431 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11432 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11433 /* found a previous ECN_ECHO update it if needed */
11434 uint32_t cnt, ctsn;
11436 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11437 ctsn = ntohl(ecne->tsn);
11438 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11439 ecne->tsn = htonl(high_tsn);
11440 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11442 cnt = ntohl(ecne->num_pkts_since_cwr);
11444 ecne->num_pkts_since_cwr = htonl(cnt);
11448 /* nope could not find one to update so we must build one */
11449 sctp_alloc_a_chunk(stcb, chk);
11453 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11454 chk->copy_by_ref = 0;
11455 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11456 chk->rec.chunk_id.can_take_data = 0;
11458 chk->asoc = &stcb->asoc;
11459 chk->send_size = sizeof(struct sctp_ecne_chunk);
11460 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11461 if (chk->data == NULL) {
11462 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11465 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11466 SCTP_BUF_LEN(chk->data) = chk->send_size;
11467 chk->sent = SCTP_DATAGRAM_UNSENT;
11468 chk->snd_count = 0;
11470 atomic_add_int(&chk->whoTo->ref_count, 1);
11472 stcb->asoc.ecn_echo_cnt_onq++;
11473 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11474 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11475 ecne->ch.chunk_flags = 0;
11476 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11477 ecne->tsn = htonl(high_tsn);
11478 ecne->num_pkts_since_cwr = htonl(1);
11479 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11480 asoc->ctrl_queue_cnt++;
11484 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11485 struct mbuf *m, int len, int iphlen, int bad_crc)
11487 struct sctp_association *asoc;
11488 struct sctp_pktdrop_chunk *drp;
11489 struct sctp_tmit_chunk *chk;
11495 struct sctp_chunkhdr *ch, chunk_buf;
11496 unsigned int chk_length;
11501 asoc = &stcb->asoc;
11502 SCTP_TCB_LOCK_ASSERT(stcb);
11503 if (asoc->pktdrop_supported == 0) {
11505 * peer must declare support before I send one.
11509 if (stcb->sctp_socket == NULL) {
11512 sctp_alloc_a_chunk(stcb, chk);
11516 chk->copy_by_ref = 0;
11517 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11518 chk->rec.chunk_id.can_take_data = 1;
11521 chk->send_size = len;
11522 /* Validate that we do not have an ABORT in here. */
11523 offset = iphlen + sizeof(struct sctphdr);
11524 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11525 sizeof(*ch), (uint8_t *)&chunk_buf);
11526 while (ch != NULL) {
11527 chk_length = ntohs(ch->chunk_length);
11528 if (chk_length < sizeof(*ch)) {
11529 /* break to abort land */
11532 switch (ch->chunk_type) {
11533 case SCTP_PACKET_DROPPED:
11534 case SCTP_ABORT_ASSOCIATION:
11535 case SCTP_INITIATION_ACK:
11537 * We don't respond with an PKT-DROP to an ABORT
11538 * or PKT-DROP. We also do not respond to an
11539 * INIT-ACK, because we can't know if the initiation
11540 * tag is correct or not.
11542 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11547 offset += SCTP_SIZE32(chk_length);
11548 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11549 sizeof(*ch), (uint8_t *)&chunk_buf);
11552 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11553 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11555 * only send 1 mtu worth, trim off the excess on the end.
11558 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11561 chk->asoc = &stcb->asoc;
11562 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11563 if (chk->data == NULL) {
11565 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11568 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11569 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11571 sctp_m_freem(chk->data);
11575 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11576 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11577 chk->book_size_scale = 0;
11579 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11580 drp->trunc_len = htons(fullsz);
11582 * Len is already adjusted to size minus overhead above take
11583 * out the pkt_drop chunk itself from it.
11585 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11586 len = chk->send_size;
11588 /* no truncation needed */
11589 drp->ch.chunk_flags = 0;
11590 drp->trunc_len = htons(0);
11593 drp->ch.chunk_flags |= SCTP_BADCRC;
11595 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11596 SCTP_BUF_LEN(chk->data) = chk->send_size;
11597 chk->sent = SCTP_DATAGRAM_UNSENT;
11598 chk->snd_count = 0;
11600 /* we should hit here */
11602 atomic_add_int(&chk->whoTo->ref_count, 1);
11606 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11607 drp->ch.chunk_length = htons(chk->send_size);
11608 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11612 drp->bottle_bw = htonl(spc);
11613 if (asoc->my_rwnd) {
11614 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11615 asoc->size_on_all_streams +
11616 asoc->my_rwnd_control_len +
11617 stcb->sctp_socket->so_rcv.sb_cc);
11620 * If my rwnd is 0, possibly from mbuf depletion as well as
11621 * space used, tell the peer there is NO space aka onq == bw
11623 drp->current_onq = htonl(spc);
11627 m_copydata(m, iphlen, len, (caddr_t)datap);
11628 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11629 asoc->ctrl_queue_cnt++;
11633 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11635 struct sctp_association *asoc;
11636 struct sctp_cwr_chunk *cwr;
11637 struct sctp_tmit_chunk *chk;
11639 SCTP_TCB_LOCK_ASSERT(stcb);
11643 asoc = &stcb->asoc;
11644 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11645 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11647 * found a previous CWR queued to same destination
11648 * update it if needed
11652 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11653 ctsn = ntohl(cwr->tsn);
11654 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11655 cwr->tsn = htonl(high_tsn);
11657 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11658 /* Make sure override is carried */
11659 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11664 sctp_alloc_a_chunk(stcb, chk);
11668 chk->copy_by_ref = 0;
11669 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11670 chk->rec.chunk_id.can_take_data = 1;
11672 chk->asoc = &stcb->asoc;
11673 chk->send_size = sizeof(struct sctp_cwr_chunk);
11674 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11675 if (chk->data == NULL) {
11676 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11679 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11680 SCTP_BUF_LEN(chk->data) = chk->send_size;
11681 chk->sent = SCTP_DATAGRAM_UNSENT;
11682 chk->snd_count = 0;
11684 atomic_add_int(&chk->whoTo->ref_count, 1);
11685 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11686 cwr->ch.chunk_type = SCTP_ECN_CWR;
11687 cwr->ch.chunk_flags = override;
11688 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11689 cwr->tsn = htonl(high_tsn);
11690 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11691 asoc->ctrl_queue_cnt++;
11695 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11696 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11698 uint16_t len, old_len, i;
11699 struct sctp_stream_reset_out_request *req_out;
11700 struct sctp_chunkhdr *ch;
11702 int number_entries = 0;
11704 ch = mtod(chk->data, struct sctp_chunkhdr *);
11705 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11706 /* get to new offset for the param. */
11707 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11708 /* now how long will this param be? */
11709 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11710 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11711 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11712 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11716 if (number_entries == 0) {
11719 if (number_entries == stcb->asoc.streamoutcnt) {
11720 number_entries = 0;
11722 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11723 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11725 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11726 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11727 req_out->ph.param_length = htons(len);
11728 req_out->request_seq = htonl(seq);
11729 req_out->response_seq = htonl(resp_seq);
11730 req_out->send_reset_at_tsn = htonl(last_sent);
11732 if (number_entries) {
11733 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11734 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11735 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11736 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11737 req_out->list_of_streams[at] = htons(i);
11739 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11740 if (at >= number_entries) {
11746 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11747 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11750 if (SCTP_SIZE32(len) > len) {
11752 * Need to worry about the pad we may end up adding to the
11753 * end. This is easy since the struct is either aligned to 4
11754 * bytes or 2 bytes off.
11756 req_out->list_of_streams[number_entries] = 0;
11758 /* now fix the chunk length */
11759 ch->chunk_length = htons(len + old_len);
11760 chk->book_size = len + old_len;
11761 chk->book_size_scale = 0;
11762 chk->send_size = SCTP_SIZE32(chk->book_size);
11763 SCTP_BUF_LEN(chk->data) = chk->send_size;
11768 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11769 int number_entries, uint16_t *list,
11772 uint16_t len, old_len, i;
11773 struct sctp_stream_reset_in_request *req_in;
11774 struct sctp_chunkhdr *ch;
11776 ch = mtod(chk->data, struct sctp_chunkhdr *);
11777 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11779 /* get to new offset for the param. */
11780 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11781 /* now how long will this param be? */
11782 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11783 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11784 req_in->ph.param_length = htons(len);
11785 req_in->request_seq = htonl(seq);
11786 if (number_entries) {
11787 for (i = 0; i < number_entries; i++) {
11788 req_in->list_of_streams[i] = htons(list[i]);
11791 if (SCTP_SIZE32(len) > len) {
11793 * Need to worry about the pad we may end up adding to the
11794 * end. This is easy since the struct is either aligned to 4
11795 * bytes or 2 bytes off.
11797 req_in->list_of_streams[number_entries] = 0;
11799 /* now fix the chunk length */
11800 ch->chunk_length = htons(len + old_len);
11801 chk->book_size = len + old_len;
11802 chk->book_size_scale = 0;
11803 chk->send_size = SCTP_SIZE32(chk->book_size);
11804 SCTP_BUF_LEN(chk->data) = chk->send_size;
11809 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11812 uint16_t len, old_len;
11813 struct sctp_stream_reset_tsn_request *req_tsn;
11814 struct sctp_chunkhdr *ch;
11816 ch = mtod(chk->data, struct sctp_chunkhdr *);
11817 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11819 /* get to new offset for the param. */
11820 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11821 /* now how long will this param be? */
11822 len = sizeof(struct sctp_stream_reset_tsn_request);
11823 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11824 req_tsn->ph.param_length = htons(len);
11825 req_tsn->request_seq = htonl(seq);
11827 /* now fix the chunk length */
11828 ch->chunk_length = htons(len + old_len);
11829 chk->send_size = len + old_len;
11830 chk->book_size = SCTP_SIZE32(chk->send_size);
11831 chk->book_size_scale = 0;
11832 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11837 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11838 uint32_t resp_seq, uint32_t result)
11840 uint16_t len, old_len;
11841 struct sctp_stream_reset_response *resp;
11842 struct sctp_chunkhdr *ch;
11844 ch = mtod(chk->data, struct sctp_chunkhdr *);
11845 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11847 /* get to new offset for the param. */
11848 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11849 /* now how long will this param be? */
11850 len = sizeof(struct sctp_stream_reset_response);
11851 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11852 resp->ph.param_length = htons(len);
11853 resp->response_seq = htonl(resp_seq);
11854 resp->result = ntohl(result);
11856 /* now fix the chunk length */
11857 ch->chunk_length = htons(len + old_len);
11858 chk->book_size = len + old_len;
11859 chk->book_size_scale = 0;
11860 chk->send_size = SCTP_SIZE32(chk->book_size);
11861 SCTP_BUF_LEN(chk->data) = chk->send_size;
11866 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11867 struct sctp_stream_reset_list *ent,
11870 struct sctp_association *asoc;
11871 struct sctp_tmit_chunk *chk;
11872 struct sctp_chunkhdr *ch;
11874 asoc = &stcb->asoc;
11877 * Reset our last reset action to the new one IP -> response
11878 * (PERFORMED probably). This assures that if we fail to send, a
11879 * retran from the peer will get the new response.
11881 asoc->last_reset_action[0] = response;
11882 if (asoc->stream_reset_outstanding) {
11885 sctp_alloc_a_chunk(stcb, chk);
11887 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11890 chk->copy_by_ref = 0;
11891 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11892 chk->rec.chunk_id.can_take_data = 0;
11894 chk->asoc = &stcb->asoc;
11895 chk->book_size = sizeof(struct sctp_chunkhdr);
11896 chk->send_size = SCTP_SIZE32(chk->book_size);
11897 chk->book_size_scale = 0;
11898 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11899 if (chk->data == NULL) {
11900 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11901 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11904 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11905 /* setup chunk parameters */
11906 chk->sent = SCTP_DATAGRAM_UNSENT;
11907 chk->snd_count = 0;
11908 if (stcb->asoc.alternate) {
11909 chk->whoTo = stcb->asoc.alternate;
11911 chk->whoTo = stcb->asoc.primary_destination;
11913 ch = mtod(chk->data, struct sctp_chunkhdr *);
11914 ch->chunk_type = SCTP_STREAM_RESET;
11915 ch->chunk_flags = 0;
11916 ch->chunk_length = htons(chk->book_size);
11917 atomic_add_int(&chk->whoTo->ref_count, 1);
11918 SCTP_BUF_LEN(chk->data) = chk->send_size;
11919 sctp_add_stream_reset_result(chk, ent->seq, response);
11920 /* insert the chunk for sending */
11921 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11924 asoc->ctrl_queue_cnt++;
11928 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11929 uint32_t resp_seq, uint32_t result,
11930 uint32_t send_una, uint32_t recv_next)
11932 uint16_t len, old_len;
11933 struct sctp_stream_reset_response_tsn *resp;
11934 struct sctp_chunkhdr *ch;
11936 ch = mtod(chk->data, struct sctp_chunkhdr *);
11937 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11939 /* get to new offset for the param. */
11940 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11941 /* now how long will this param be? */
11942 len = sizeof(struct sctp_stream_reset_response_tsn);
11943 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11944 resp->ph.param_length = htons(len);
11945 resp->response_seq = htonl(resp_seq);
11946 resp->result = htonl(result);
11947 resp->senders_next_tsn = htonl(send_una);
11948 resp->receivers_next_tsn = htonl(recv_next);
11950 /* now fix the chunk length */
11951 ch->chunk_length = htons(len + old_len);
11952 chk->book_size = len + old_len;
11953 chk->send_size = SCTP_SIZE32(chk->book_size);
11954 chk->book_size_scale = 0;
11955 SCTP_BUF_LEN(chk->data) = chk->send_size;
11960 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11964 uint16_t len, old_len;
11965 struct sctp_chunkhdr *ch;
11966 struct sctp_stream_reset_add_strm *addstr;
11968 ch = mtod(chk->data, struct sctp_chunkhdr *);
11969 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11971 /* get to new offset for the param. */
11972 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11973 /* now how long will this param be? */
11974 len = sizeof(struct sctp_stream_reset_add_strm);
11977 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11978 addstr->ph.param_length = htons(len);
11979 addstr->request_seq = htonl(seq);
11980 addstr->number_of_streams = htons(adding);
11981 addstr->reserved = 0;
11983 /* now fix the chunk length */
11984 ch->chunk_length = htons(len + old_len);
11985 chk->send_size = len + old_len;
11986 chk->book_size = SCTP_SIZE32(chk->send_size);
11987 chk->book_size_scale = 0;
11988 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11993 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11997 uint16_t len, old_len;
11998 struct sctp_chunkhdr *ch;
11999 struct sctp_stream_reset_add_strm *addstr;
12001 ch = mtod(chk->data, struct sctp_chunkhdr *);
12002 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12004 /* get to new offset for the param. */
12005 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12006 /* now how long will this param be? */
12007 len = sizeof(struct sctp_stream_reset_add_strm);
12009 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12010 addstr->ph.param_length = htons(len);
12011 addstr->request_seq = htonl(seq);
12012 addstr->number_of_streams = htons(adding);
12013 addstr->reserved = 0;
12015 /* now fix the chunk length */
12016 ch->chunk_length = htons(len + old_len);
12017 chk->send_size = len + old_len;
12018 chk->book_size = SCTP_SIZE32(chk->send_size);
12019 chk->book_size_scale = 0;
12020 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12025 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12027 struct sctp_association *asoc;
12028 struct sctp_tmit_chunk *chk;
12029 struct sctp_chunkhdr *ch;
12032 asoc = &stcb->asoc;
12033 asoc->trigger_reset = 0;
12034 if (asoc->stream_reset_outstanding) {
12037 sctp_alloc_a_chunk(stcb, chk);
12039 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12042 chk->copy_by_ref = 0;
12043 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12044 chk->rec.chunk_id.can_take_data = 0;
12046 chk->asoc = &stcb->asoc;
12047 chk->book_size = sizeof(struct sctp_chunkhdr);
12048 chk->send_size = SCTP_SIZE32(chk->book_size);
12049 chk->book_size_scale = 0;
12050 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12051 if (chk->data == NULL) {
12052 sctp_free_a_chunk(stcb, chk, so_locked);
12053 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12056 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12058 /* setup chunk parameters */
12059 chk->sent = SCTP_DATAGRAM_UNSENT;
12060 chk->snd_count = 0;
12061 if (stcb->asoc.alternate) {
12062 chk->whoTo = stcb->asoc.alternate;
12064 chk->whoTo = stcb->asoc.primary_destination;
12066 ch = mtod(chk->data, struct sctp_chunkhdr *);
12067 ch->chunk_type = SCTP_STREAM_RESET;
12068 ch->chunk_flags = 0;
12069 ch->chunk_length = htons(chk->book_size);
12070 atomic_add_int(&chk->whoTo->ref_count, 1);
12071 SCTP_BUF_LEN(chk->data) = chk->send_size;
12072 seq = stcb->asoc.str_reset_seq_out;
12073 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12075 asoc->stream_reset_outstanding++;
12077 m_freem(chk->data);
12079 sctp_free_a_chunk(stcb, chk, so_locked);
12082 asoc->str_reset = chk;
12083 /* insert the chunk for sending */
12084 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12087 asoc->ctrl_queue_cnt++;
12089 if (stcb->asoc.send_sack) {
12090 sctp_send_sack(stcb, so_locked);
12092 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12097 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12098 uint16_t number_entries, uint16_t *list,
12099 uint8_t send_in_req,
12100 uint8_t send_tsn_req,
12101 uint8_t add_stream,
12103 uint16_t adding_i, uint8_t peer_asked)
12105 struct sctp_association *asoc;
12106 struct sctp_tmit_chunk *chk;
12107 struct sctp_chunkhdr *ch;
12108 int can_send_out_req = 0;
12111 asoc = &stcb->asoc;
12112 if (asoc->stream_reset_outstanding) {
12114 * Already one pending, must get ACK back to clear the flag.
12116 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12119 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12120 (add_stream == 0)) {
12121 /* nothing to do */
12122 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12125 if (send_tsn_req && send_in_req) {
12126 /* error, can't do that */
12127 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12129 } else if (send_in_req) {
12130 can_send_out_req = 1;
12132 if (number_entries > (MCLBYTES -
12133 SCTP_MIN_OVERHEAD -
12134 sizeof(struct sctp_chunkhdr) -
12135 sizeof(struct sctp_stream_reset_out_request)) /
12136 sizeof(uint16_t)) {
12137 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12140 sctp_alloc_a_chunk(stcb, chk);
12142 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12145 chk->copy_by_ref = 0;
12146 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12147 chk->rec.chunk_id.can_take_data = 0;
12149 chk->asoc = &stcb->asoc;
12150 chk->book_size = sizeof(struct sctp_chunkhdr);
12151 chk->send_size = SCTP_SIZE32(chk->book_size);
12152 chk->book_size_scale = 0;
12154 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12155 if (chk->data == NULL) {
12156 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12157 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12160 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12162 /* setup chunk parameters */
12163 chk->sent = SCTP_DATAGRAM_UNSENT;
12164 chk->snd_count = 0;
12165 if (stcb->asoc.alternate) {
12166 chk->whoTo = stcb->asoc.alternate;
12168 chk->whoTo = stcb->asoc.primary_destination;
12170 atomic_add_int(&chk->whoTo->ref_count, 1);
12171 ch = mtod(chk->data, struct sctp_chunkhdr *);
12172 ch->chunk_type = SCTP_STREAM_RESET;
12173 ch->chunk_flags = 0;
12174 ch->chunk_length = htons(chk->book_size);
12175 SCTP_BUF_LEN(chk->data) = chk->send_size;
12177 seq = stcb->asoc.str_reset_seq_out;
12178 if (can_send_out_req) {
12181 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12184 asoc->stream_reset_outstanding++;
12187 if ((add_stream & 1) &&
12188 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12189 /* Need to allocate more */
12190 struct sctp_stream_out *oldstream;
12191 struct sctp_stream_queue_pending *sp, *nsp;
12193 #if defined(SCTP_DETAILED_STR_STATS)
12197 oldstream = stcb->asoc.strmout;
12198 /* get some more */
12199 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12200 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12202 if (stcb->asoc.strmout == NULL) {
12205 stcb->asoc.strmout = oldstream;
12206 /* Turn off the bit */
12207 x = add_stream & 0xfe;
12212 * Ok now we proceed with copying the old out stuff and
12213 * initializing the new stuff.
12215 SCTP_TCB_SEND_LOCK(stcb);
12216 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12217 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12218 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12219 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12220 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12221 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12222 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12223 stcb->asoc.strmout[i].sid = i;
12224 stcb->asoc.strmout[i].state = oldstream[i].state;
12225 /* FIX ME FIX ME */
12227 * This should be a SS_COPY operation FIX ME STREAM
12230 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12231 /* now anything on those queues? */
12232 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12233 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12234 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12238 /* now the new streams */
12239 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12240 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12241 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12242 stcb->asoc.strmout[i].chunks_on_queues = 0;
12243 #if defined(SCTP_DETAILED_STR_STATS)
12244 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12245 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12246 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12249 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12250 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12252 stcb->asoc.strmout[i].next_mid_ordered = 0;
12253 stcb->asoc.strmout[i].next_mid_unordered = 0;
12254 stcb->asoc.strmout[i].sid = i;
12255 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12256 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12257 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12259 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12260 SCTP_FREE(oldstream, SCTP_M_STRMO);
12261 SCTP_TCB_SEND_UNLOCK(stcb);
12264 if ((add_stream & 1) && (adding_o > 0)) {
12265 asoc->strm_pending_add_size = adding_o;
12266 asoc->peer_req_out = peer_asked;
12267 sctp_add_an_out_stream(chk, seq, adding_o);
12269 asoc->stream_reset_outstanding++;
12271 if ((add_stream & 2) && (adding_i > 0)) {
12272 sctp_add_an_in_stream(chk, seq, adding_i);
12274 asoc->stream_reset_outstanding++;
12277 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12279 asoc->stream_reset_outstanding++;
12281 if (send_tsn_req) {
12282 sctp_add_stream_reset_tsn(chk, seq);
12283 asoc->stream_reset_outstanding++;
12285 asoc->str_reset = chk;
12286 /* insert the chunk for sending */
12287 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12290 asoc->ctrl_queue_cnt++;
12291 if (stcb->asoc.send_sack) {
12292 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12294 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12299 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12300 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12301 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12302 uint32_t vrf_id, uint16_t port)
12304 /* Don't respond to an ABORT with an ABORT. */
12305 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12307 sctp_m_freem(cause);
12310 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12311 mflowtype, mflowid, fibnum,
12317 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12318 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12319 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12320 uint32_t vrf_id, uint16_t port)
12322 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12323 mflowtype, mflowid, fibnum,
12328 static struct mbuf *
12329 sctp_copy_resume(struct uio *uio,
12331 int user_marks_eor,
12334 struct mbuf **new_tail)
12338 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12339 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12341 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12344 *sndout = m_length(m, NULL);
12345 *new_tail = m_last(m);
12351 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12355 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12357 if (sp->data == NULL) {
12358 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12362 sp->tail_mbuf = m_last(sp->data);
12368 static struct sctp_stream_queue_pending *
12369 sctp_copy_it_in(struct sctp_tcb *stcb,
12370 struct sctp_association *asoc,
12371 struct sctp_sndrcvinfo *srcv,
12373 struct sctp_nets *net,
12375 int user_marks_eor,
12380 * This routine must be very careful in its work. Protocol
12381 * processing is up and running so care must be taken to spl...()
12382 * when you need to do something that may effect the stcb/asoc. The
12383 * sb is locked however. When data is copied the protocol processing
12384 * should be enabled since this is a slower operation...
12386 struct sctp_stream_queue_pending *sp = NULL;
12390 /* Now can we send this? */
12391 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12392 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12393 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12394 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12395 /* got data while shutting down */
12396 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12397 *error = ECONNRESET;
12400 sctp_alloc_a_strmoq(stcb, sp);
12402 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12407 sp->sender_all_done = 0;
12408 sp->sinfo_flags = srcv->sinfo_flags;
12409 sp->timetolive = srcv->sinfo_timetolive;
12410 sp->ppid = srcv->sinfo_ppid;
12411 sp->context = srcv->sinfo_context;
12413 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12415 sp->sid = srcv->sinfo_stream;
12416 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12417 if ((sp->length == (uint32_t)uio->uio_resid) &&
12418 ((user_marks_eor == 0) ||
12419 (srcv->sinfo_flags & SCTP_EOF) ||
12420 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12421 sp->msg_is_complete = 1;
12423 sp->msg_is_complete = 0;
12425 sp->sender_all_done = 0;
12426 sp->some_taken = 0;
12427 sp->put_last_out = 0;
12428 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12429 sp->data = sp->tail_mbuf = NULL;
12430 if (sp->length == 0) {
12433 if (srcv->sinfo_keynumber_valid) {
12434 sp->auth_keyid = srcv->sinfo_keynumber;
12436 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12438 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12439 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12440 sp->holds_key_ref = 1;
12442 *error = sctp_copy_one(sp, uio, resv_in_first);
12445 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12448 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12450 atomic_add_int(&sp->net->ref_count, 1);
12454 sctp_set_prsctp_policy(sp);
12462 sctp_sosend(struct socket *so,
12463 struct sockaddr *addr,
12466 struct mbuf *control,
12471 int error, use_sndinfo = 0;
12472 struct sctp_sndrcvinfo sndrcvninfo;
12473 struct sockaddr *addr_to_use;
12474 #if defined(INET) && defined(INET6)
12475 struct sockaddr_in sin;
12479 /* process cmsg snd/rcv info (maybe a assoc-id) */
12480 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12481 sizeof(sndrcvninfo))) {
12486 addr_to_use = addr;
12487 #if defined(INET) && defined(INET6)
12488 if ((addr) && (addr->sa_family == AF_INET6)) {
12489 struct sockaddr_in6 *sin6;
12491 sin6 = (struct sockaddr_in6 *)addr;
12492 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12493 in6_sin6_2_sin(&sin, sin6);
12494 addr_to_use = (struct sockaddr *)&sin;
12498 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12501 use_sndinfo ? &sndrcvninfo : NULL
12509 sctp_lower_sosend(struct socket *so,
12510 struct sockaddr *addr,
12512 struct mbuf *i_pak,
12513 struct mbuf *control,
12515 struct sctp_sndrcvinfo *srcv
12520 unsigned int sndlen = 0, max_len;
12522 struct mbuf *top = NULL;
12523 int queue_only = 0, queue_only_for_init = 0;
12524 int free_cnt_applied = 0;
12526 int now_filled = 0;
12527 unsigned int inqueue_bytes = 0;
12528 struct sctp_block_entry be;
12529 struct sctp_inpcb *inp;
12530 struct sctp_tcb *stcb = NULL;
12531 struct timeval now;
12532 struct sctp_nets *net;
12533 struct sctp_association *asoc;
12534 struct sctp_inpcb *t_inp;
12535 int user_marks_eor;
12536 int create_lock_applied = 0;
12537 int nagle_applies = 0;
12538 int some_on_control = 0;
12539 int got_all_of_the_send = 0;
12540 int hold_tcblock = 0;
12541 int non_blocking = 0;
12542 uint32_t local_add_more, local_soresv = 0;
12544 uint16_t sinfo_flags;
12545 sctp_assoc_t sinfo_assoc_id;
12552 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12554 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12557 SCTP_RELEASE_PKT(i_pak);
12561 if ((uio == NULL) && (i_pak == NULL)) {
12562 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12565 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12566 atomic_add_int(&inp->total_sends, 1);
12568 if (uio->uio_resid < 0) {
12569 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12572 sndlen = (unsigned int)uio->uio_resid;
12574 top = SCTP_HEADER_TO_CHAIN(i_pak);
12575 sndlen = SCTP_HEADER_LEN(i_pak);
12577 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12580 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12581 SCTP_IS_LISTENING(inp)) {
12582 /* The listener can NOT send */
12583 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12588 * Pre-screen address, if one is given the sin-len
12589 * must be set correctly!
12592 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12594 switch (raddr->sa.sa_family) {
12597 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12598 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12602 port = raddr->sin.sin_port;
12607 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12608 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12612 port = raddr->sin6.sin6_port;
12616 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12617 error = EAFNOSUPPORT;
12624 sinfo_flags = srcv->sinfo_flags;
12625 sinfo_assoc_id = srcv->sinfo_assoc_id;
12626 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12627 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12628 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12632 if (srcv->sinfo_flags)
12633 SCTP_STAT_INCR(sctps_sends_with_flags);
12635 sinfo_flags = inp->def_send.sinfo_flags;
12636 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12638 if (sinfo_flags & SCTP_SENDALL) {
12639 /* its a sendall */
12640 error = sctp_sendall(inp, uio, top, srcv);
12644 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12645 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12649 /* now we must find the assoc */
12650 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12651 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12652 SCTP_INP_RLOCK(inp);
12653 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12655 SCTP_TCB_LOCK(stcb);
12658 SCTP_INP_RUNLOCK(inp);
12659 } else if (sinfo_assoc_id) {
12660 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12661 if (stcb != NULL) {
12666 * Since we did not use findep we must
12667 * increment it, and if we don't find a tcb
12670 SCTP_INP_WLOCK(inp);
12671 SCTP_INP_INCR_REF(inp);
12672 SCTP_INP_WUNLOCK(inp);
12673 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12674 if (stcb == NULL) {
12675 SCTP_INP_WLOCK(inp);
12676 SCTP_INP_DECR_REF(inp);
12677 SCTP_INP_WUNLOCK(inp);
12682 if ((stcb == NULL) && (addr)) {
12683 /* Possible implicit send? */
12684 SCTP_ASOC_CREATE_LOCK(inp);
12685 create_lock_applied = 1;
12686 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12687 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12688 /* Should I really unlock ? */
12689 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12694 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12695 (addr->sa_family == AF_INET6)) {
12696 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12700 SCTP_INP_WLOCK(inp);
12701 SCTP_INP_INCR_REF(inp);
12702 SCTP_INP_WUNLOCK(inp);
12703 /* With the lock applied look again */
12704 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12705 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12706 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12708 if (stcb == NULL) {
12709 SCTP_INP_WLOCK(inp);
12710 SCTP_INP_DECR_REF(inp);
12711 SCTP_INP_WUNLOCK(inp);
12718 if (t_inp != inp) {
12719 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12724 if (stcb == NULL) {
12725 if (addr == NULL) {
12726 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12730 /* We must go ahead and start the INIT process */
12733 if ((sinfo_flags & SCTP_ABORT) ||
12734 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12736 * User asks to abort a non-existant assoc,
12737 * or EOF a non-existant assoc with no data
12739 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12743 /* get an asoc/stcb struct */
12744 vrf_id = inp->def_vrf_id;
12746 if (create_lock_applied == 0) {
12747 panic("Error, should hold create lock and I don't?");
12750 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12751 inp->sctp_ep.pre_open_stream_count,
12754 if (stcb == NULL) {
12755 /* Error is setup for us in the call */
12758 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12759 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12761 * Set the connected flag so we can queue
12764 soisconnecting(so);
12767 if (create_lock_applied) {
12768 SCTP_ASOC_CREATE_UNLOCK(inp);
12769 create_lock_applied = 0;
12771 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12774 * Turn on queue only flag to prevent data from
12778 asoc = &stcb->asoc;
12779 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12780 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12782 /* initialize authentication params for the assoc */
12783 sctp_initialize_auth_params(inp, stcb);
12786 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12787 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12788 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12794 /* out with the INIT */
12795 queue_only_for_init = 1;
12797 * we may want to dig in after this call and adjust the MTU
12798 * value. It defaulted to 1500 (constant) but the ro
12799 * structure may now have an update and thus we may need to
12800 * change it BEFORE we append the message.
12804 asoc = &stcb->asoc;
12806 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12807 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12809 net = sctp_findnet(stcb, addr);
12812 if ((net == NULL) ||
12813 ((port != 0) && (port != stcb->rport))) {
12814 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12819 if (stcb->asoc.alternate) {
12820 net = stcb->asoc.alternate;
12822 net = stcb->asoc.primary_destination;
12825 atomic_add_int(&stcb->total_sends, 1);
12826 /* Keep the stcb from being freed under our feet */
12827 atomic_add_int(&asoc->refcnt, 1);
12828 free_cnt_applied = 1;
12830 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12831 if (sndlen > asoc->smallest_mtu) {
12832 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12837 if (SCTP_SO_IS_NBIO(so)
12838 || (flags & MSG_NBIO)
12842 /* would we block? */
12843 if (non_blocking) {
12846 if (hold_tcblock == 0) {
12847 SCTP_TCB_LOCK(stcb);
12850 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12851 if (user_marks_eor == 0) {
12856 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12857 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12858 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12859 if (sndlen > SCTP_SB_LIMIT_SND(so))
12862 error = EWOULDBLOCK;
12865 stcb->asoc.sb_send_resv += sndlen;
12866 SCTP_TCB_UNLOCK(stcb);
12869 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12871 local_soresv = sndlen;
12872 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12873 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12874 error = ECONNRESET;
12877 if (create_lock_applied) {
12878 SCTP_ASOC_CREATE_UNLOCK(inp);
12879 create_lock_applied = 0;
12881 /* Is the stream no. valid? */
12882 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12883 /* Invalid stream number */
12884 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12888 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12889 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12891 * Can't queue any data while stream reset is underway.
12893 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12898 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12901 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12902 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12905 /* we are now done with all control */
12907 sctp_m_freem(control);
12910 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12911 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12912 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12913 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12914 if (srcv->sinfo_flags & SCTP_ABORT) {
12917 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12918 error = ECONNRESET;
12922 /* Ok, we will attempt a msgsnd :> */
12924 p->td_ru.ru_msgsnd++;
12926 /* Are we aborting? */
12927 if (srcv->sinfo_flags & SCTP_ABORT) {
12929 int tot_demand, tot_out = 0, max_out;
12931 SCTP_STAT_INCR(sctps_sends_with_abort);
12932 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12933 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12934 /* It has to be up before we abort */
12935 /* how big is the user initiated abort? */
12936 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12940 if (hold_tcblock) {
12941 SCTP_TCB_UNLOCK(stcb);
12945 struct mbuf *cntm = NULL;
12947 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12949 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12950 tot_out += SCTP_BUF_LEN(cntm);
12954 /* Must fit in a MTU */
12956 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12957 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12959 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12963 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12966 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12970 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12971 max_out -= sizeof(struct sctp_abort_msg);
12972 if (tot_out > max_out) {
12976 struct sctp_paramhdr *ph;
12978 /* now move forward the data pointer */
12979 ph = mtod(mm, struct sctp_paramhdr *);
12980 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12981 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12983 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12985 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12988 * Here if we can't get his data we
12989 * still abort we just don't get to
12990 * send the users note :-0
12997 SCTP_BUF_NEXT(mm) = top;
13001 if (hold_tcblock == 0) {
13002 SCTP_TCB_LOCK(stcb);
13004 atomic_add_int(&stcb->asoc.refcnt, -1);
13005 free_cnt_applied = 0;
13006 /* release this lock, otherwise we hang on ourselves */
13007 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13008 /* now relock the stcb so everything is sane */
13012 * In this case top is already chained to mm avoid double
13013 * free, since we free it below if top != NULL and driver
13014 * would free it after sending the packet out
13021 /* Calculate the maximum we can send */
13022 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13023 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13024 if (non_blocking) {
13025 /* we already checked for non-blocking above. */
13028 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13033 if (hold_tcblock) {
13034 SCTP_TCB_UNLOCK(stcb);
13037 if (asoc->strmout == NULL) {
13038 /* huh? software error */
13039 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13044 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13045 if ((user_marks_eor == 0) &&
13046 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13047 /* It will NEVER fit */
13048 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13052 if ((uio == NULL) && user_marks_eor) {
13054 * We do not support eeor mode for
13055 * sending with mbuf chains (like sendfile).
13057 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13062 if (user_marks_eor) {
13063 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13066 * For non-eeor the whole message must fit in
13067 * the socket send buffer.
13069 local_add_more = sndlen;
13072 if (non_blocking) {
13073 goto skip_preblock;
13075 if (((max_len <= local_add_more) &&
13076 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13078 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13079 /* No room right now ! */
13080 SOCKBUF_LOCK(&so->so_snd);
13081 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13082 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13083 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13084 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13085 (unsigned int)SCTP_SB_LIMIT_SND(so),
13088 stcb->asoc.stream_queue_cnt,
13089 stcb->asoc.chunks_on_out_queue,
13090 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13091 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13092 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13095 stcb->block_entry = &be;
13096 error = sbwait(&so->so_snd);
13097 stcb->block_entry = NULL;
13098 if (error || so->so_error || be.error) {
13101 error = so->so_error;
13106 SOCKBUF_UNLOCK(&so->so_snd);
13109 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13110 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13111 asoc, stcb->asoc.total_output_queue_size);
13113 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13114 SOCKBUF_UNLOCK(&so->so_snd);
13117 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13119 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13120 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13124 SOCKBUF_UNLOCK(&so->so_snd);
13128 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13132 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13133 * case NOTE: uio will be null when top/mbuf is passed
13136 if (srcv->sinfo_flags & SCTP_EOF) {
13137 got_all_of_the_send = 1;
13140 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13146 struct sctp_stream_queue_pending *sp;
13147 struct sctp_stream_out *strm;
13150 SCTP_TCB_SEND_LOCK(stcb);
13151 if ((asoc->stream_locked) &&
13152 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13153 SCTP_TCB_SEND_UNLOCK(stcb);
13154 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13158 SCTP_TCB_SEND_UNLOCK(stcb);
13160 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13161 if (strm->last_msg_incomplete == 0) {
13163 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13167 SCTP_TCB_SEND_LOCK(stcb);
13168 if (sp->msg_is_complete) {
13169 strm->last_msg_incomplete = 0;
13170 asoc->stream_locked = 0;
13173 * Just got locked to this guy in case of an
13176 strm->last_msg_incomplete = 1;
13177 if (stcb->asoc.idata_supported == 0) {
13178 asoc->stream_locked = 1;
13179 asoc->stream_locked_on = srcv->sinfo_stream;
13181 sp->sender_all_done = 0;
13183 sctp_snd_sb_alloc(stcb, sp->length);
13184 atomic_add_int(&asoc->stream_queue_cnt, 1);
13185 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13186 SCTP_STAT_INCR(sctps_sends_with_unord);
13188 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13189 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13190 SCTP_TCB_SEND_UNLOCK(stcb);
13192 SCTP_TCB_SEND_LOCK(stcb);
13193 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13194 SCTP_TCB_SEND_UNLOCK(stcb);
13196 /* ???? Huh ??? last msg is gone */
13198 panic("Warning: Last msg marked incomplete, yet nothing left?");
13200 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13201 strm->last_msg_incomplete = 0;
13207 while (uio->uio_resid > 0) {
13208 /* How much room do we have? */
13209 struct mbuf *new_tail, *mm;
13211 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13212 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13213 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13217 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13218 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13219 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13222 if (hold_tcblock) {
13223 SCTP_TCB_UNLOCK(stcb);
13226 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13227 if ((mm == NULL) || error) {
13233 /* Update the mbuf and count */
13234 SCTP_TCB_SEND_LOCK(stcb);
13235 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13237 * we need to get out. Peer probably
13241 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13242 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13243 error = ECONNRESET;
13245 SCTP_TCB_SEND_UNLOCK(stcb);
13248 if (sp->tail_mbuf) {
13249 /* tack it to the end */
13250 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13251 sp->tail_mbuf = new_tail;
13253 /* A stolen mbuf */
13255 sp->tail_mbuf = new_tail;
13257 sctp_snd_sb_alloc(stcb, sndout);
13258 atomic_add_int(&sp->length, sndout);
13260 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13261 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13264 /* Did we reach EOR? */
13265 if ((uio->uio_resid == 0) &&
13266 ((user_marks_eor == 0) ||
13267 (srcv->sinfo_flags & SCTP_EOF) ||
13268 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13269 sp->msg_is_complete = 1;
13271 sp->msg_is_complete = 0;
13273 SCTP_TCB_SEND_UNLOCK(stcb);
13275 if (uio->uio_resid == 0) {
13280 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13282 * This is ugly but we must assure locking
13285 if (hold_tcblock == 0) {
13286 SCTP_TCB_LOCK(stcb);
13289 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13290 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13291 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13292 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13298 SCTP_TCB_UNLOCK(stcb);
13301 /* wait for space now */
13302 if (non_blocking) {
13303 /* Non-blocking io in place out */
13306 /* What about the INIT, send it maybe */
13307 if (queue_only_for_init) {
13308 if (hold_tcblock == 0) {
13309 SCTP_TCB_LOCK(stcb);
13312 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13313 /* a collision took us forward? */
13316 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13317 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13321 if ((net->flight_size > net->cwnd) &&
13322 (asoc->sctp_cmt_on_off == 0)) {
13323 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13325 } else if (asoc->ifp_had_enobuf) {
13326 SCTP_STAT_INCR(sctps_ifnomemqueued);
13327 if (net->flight_size > (2 * net->mtu)) {
13330 asoc->ifp_had_enobuf = 0;
13332 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13333 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13334 (stcb->asoc.total_flight > 0) &&
13335 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13336 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13339 * Ok, Nagle is set on and we have data outstanding.
13340 * Don't send anything and let SACKs drive out the
13341 * data unless we have a "full" segment to send.
13343 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13344 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13346 SCTP_STAT_INCR(sctps_naglequeued);
13349 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13350 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13351 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13353 SCTP_STAT_INCR(sctps_naglesent);
13356 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13358 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13359 nagle_applies, un_sent);
13360 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13361 stcb->asoc.total_flight,
13362 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13364 if (queue_only_for_init)
13365 queue_only_for_init = 0;
13366 if ((queue_only == 0) && (nagle_applies == 0)) {
13368 * need to start chunk output
13369 * before blocking.. note that if
13370 * a lock is already applied, then
13371 * the input via the net is happening
13372 * and I don't need to start output :-D
13374 if (hold_tcblock == 0) {
13375 if (SCTP_TCB_TRYLOCK(stcb)) {
13377 sctp_chunk_output(inp,
13379 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13382 sctp_chunk_output(inp,
13384 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13386 if (hold_tcblock == 1) {
13387 SCTP_TCB_UNLOCK(stcb);
13391 SOCKBUF_LOCK(&so->so_snd);
13393 * This is a bit strange, but I think it will
13394 * work. The total_output_queue_size is locked and
13395 * protected by the TCB_LOCK, which we just released.
13396 * There is a race that can occur between releasing it
13397 * above, and me getting the socket lock, where sacks
13398 * come in but we have not put the SB_WAIT on the
13399 * so_snd buffer to get the wakeup. After the LOCK
13400 * is applied the sack_processing will also need to
13401 * LOCK the so->so_snd to do the actual sowwakeup(). So
13402 * once we have the socket buffer lock if we recheck the
13403 * size we KNOW we will get to sleep safely with the
13404 * wakeup flag in place.
13406 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13407 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13408 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13409 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13410 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13411 asoc, (size_t)uio->uio_resid);
13414 stcb->block_entry = &be;
13415 error = sbwait(&so->so_snd);
13416 stcb->block_entry = NULL;
13418 if (error || so->so_error || be.error) {
13421 error = so->so_error;
13426 SOCKBUF_UNLOCK(&so->so_snd);
13430 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13431 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13432 asoc, stcb->asoc.total_output_queue_size);
13435 SOCKBUF_UNLOCK(&so->so_snd);
13436 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13440 SCTP_TCB_SEND_LOCK(stcb);
13441 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13442 SCTP_TCB_SEND_UNLOCK(stcb);
13446 if (sp->msg_is_complete == 0) {
13447 strm->last_msg_incomplete = 1;
13448 if (stcb->asoc.idata_supported == 0) {
13449 asoc->stream_locked = 1;
13450 asoc->stream_locked_on = srcv->sinfo_stream;
13453 sp->sender_all_done = 1;
13454 strm->last_msg_incomplete = 0;
13455 asoc->stream_locked = 0;
13458 SCTP_PRINTF("Huh no sp TSNH?\n");
13459 strm->last_msg_incomplete = 0;
13460 asoc->stream_locked = 0;
13462 SCTP_TCB_SEND_UNLOCK(stcb);
13463 if (uio->uio_resid == 0) {
13464 got_all_of_the_send = 1;
13467 /* We send in a 0, since we do NOT have any locks */
13468 error = sctp_msg_append(stcb, net, top, srcv, 0);
13470 if (srcv->sinfo_flags & SCTP_EOF) {
13472 * This should only happen for Panda for the mbuf
13473 * send case, which does NOT yet support EEOR mode.
13474 * Thus, we can just set this flag to do the proper
13477 got_all_of_the_send = 1;
13485 if ((srcv->sinfo_flags & SCTP_EOF) &&
13486 (got_all_of_the_send == 1)) {
13487 SCTP_STAT_INCR(sctps_sends_with_eof);
13489 if (hold_tcblock == 0) {
13490 SCTP_TCB_LOCK(stcb);
13493 if (TAILQ_EMPTY(&asoc->send_queue) &&
13494 TAILQ_EMPTY(&asoc->sent_queue) &&
13495 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13496 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13499 /* there is nothing queued to send, so I'm done... */
13500 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13501 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13502 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13503 struct sctp_nets *netp;
13505 /* only send SHUTDOWN the first time through */
13506 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13507 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13509 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13510 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13511 sctp_stop_timers_for_shutdown(stcb);
13512 if (stcb->asoc.alternate) {
13513 netp = stcb->asoc.alternate;
13515 netp = stcb->asoc.primary_destination;
13517 sctp_send_shutdown(stcb, netp);
13518 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13520 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13521 asoc->primary_destination);
13525 * we still got (or just got) data to send, so set
13529 * XXX sockets draft says that SCTP_EOF should be
13530 * sent with no data. currently, we will allow user
13531 * data to be sent first and move to
13534 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13535 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13536 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13537 if (hold_tcblock == 0) {
13538 SCTP_TCB_LOCK(stcb);
13541 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13542 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13544 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13545 if (TAILQ_EMPTY(&asoc->send_queue) &&
13546 TAILQ_EMPTY(&asoc->sent_queue) &&
13547 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13548 struct mbuf *op_err;
13549 char msg[SCTP_DIAG_INFO_LEN];
13552 if (free_cnt_applied) {
13553 atomic_add_int(&stcb->asoc.refcnt, -1);
13554 free_cnt_applied = 0;
13556 snprintf(msg, sizeof(msg),
13557 "%s:%d at %s", __FILE__, __LINE__, __func__);
13558 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13560 sctp_abort_an_association(stcb->sctp_ep, stcb,
13561 op_err, SCTP_SO_LOCKED);
13563 * now relock the stcb so everything
13570 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13571 asoc->primary_destination);
13572 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13577 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13578 some_on_control = 1;
13580 if (queue_only_for_init) {
13581 if (hold_tcblock == 0) {
13582 SCTP_TCB_LOCK(stcb);
13585 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13586 /* a collision took us forward? */
13589 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13590 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13594 if ((net->flight_size > net->cwnd) &&
13595 (stcb->asoc.sctp_cmt_on_off == 0)) {
13596 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13598 } else if (asoc->ifp_had_enobuf) {
13599 SCTP_STAT_INCR(sctps_ifnomemqueued);
13600 if (net->flight_size > (2 * net->mtu)) {
13603 asoc->ifp_had_enobuf = 0;
13605 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13606 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13607 (stcb->asoc.total_flight > 0) &&
13608 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13609 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13611 * Ok, Nagle is set on and we have data outstanding.
13612 * Don't send anything and let SACKs drive out the
13613 * data unless wen have a "full" segment to send.
13615 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13616 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13618 SCTP_STAT_INCR(sctps_naglequeued);
13621 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13622 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13623 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13625 SCTP_STAT_INCR(sctps_naglesent);
13628 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13629 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13630 nagle_applies, un_sent);
13631 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13632 stcb->asoc.total_flight,
13633 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13635 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13636 /* we can attempt to send too. */
13637 if (hold_tcblock == 0) {
13639 * If there is activity recv'ing sacks no need to
13642 if (SCTP_TCB_TRYLOCK(stcb)) {
13643 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13647 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13649 } else if ((queue_only == 0) &&
13650 (stcb->asoc.peers_rwnd == 0) &&
13651 (stcb->asoc.total_flight == 0)) {
13652 /* We get to have a probe outstanding */
13653 if (hold_tcblock == 0) {
13655 SCTP_TCB_LOCK(stcb);
13657 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13658 } else if (some_on_control) {
13659 int num_out, reason, frag_point;
13661 /* Here we do control only */
13662 if (hold_tcblock == 0) {
13664 SCTP_TCB_LOCK(stcb);
13666 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13667 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13668 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13670 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13671 queue_only, stcb->asoc.peers_rwnd, un_sent,
13672 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13673 stcb->asoc.total_output_queue_size, error);
13678 if (local_soresv && stcb) {
13679 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13681 if (create_lock_applied) {
13682 SCTP_ASOC_CREATE_UNLOCK(inp);
13684 if ((stcb) && hold_tcblock) {
13685 SCTP_TCB_UNLOCK(stcb);
13687 if (stcb && free_cnt_applied) {
13688 atomic_add_int(&stcb->asoc.refcnt, -1);
13692 if (mtx_owned(&stcb->tcb_mtx)) {
13693 panic("Leaving with tcb mtx owned?");
13695 if (mtx_owned(&stcb->tcb_send_mtx)) {
13696 panic("Leaving with tcb send mtx owned?");
13704 sctp_m_freem(control);
13711 * generate an AUTHentication chunk, if required
13714 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13715 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13716 struct sctp_tcb *stcb, uint8_t chunk)
13718 struct mbuf *m_auth;
13719 struct sctp_auth_chunk *auth;
13723 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13727 if (stcb->asoc.auth_supported == 0) {
13730 /* does the requested chunk require auth? */
13731 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13734 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13735 if (m_auth == NULL) {
13739 /* reserve some space if this will be the first mbuf */
13741 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13742 /* fill in the AUTH chunk details */
13743 auth = mtod(m_auth, struct sctp_auth_chunk *);
13744 memset(auth, 0, sizeof(*auth));
13745 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13746 auth->ch.chunk_flags = 0;
13747 chunk_len = sizeof(*auth) +
13748 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13749 auth->ch.chunk_length = htons(chunk_len);
13750 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13751 /* key id and hmac digest will be computed and filled in upon send */
13753 /* save the offset where the auth was inserted into the chain */
13755 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13756 *offset += SCTP_BUF_LEN(cn);
13759 /* update length and return pointer to the auth chunk */
13760 SCTP_BUF_LEN(m_auth) = chunk_len;
13761 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13762 if (auth_ret != NULL)
13770 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13772 struct nd_prefix *pfx = NULL;
13773 struct nd_pfxrouter *pfxrtr = NULL;
13774 struct sockaddr_in6 gw6;
13776 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13779 /* get prefix entry of address */
13781 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13782 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13784 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13785 &src6->sin6_addr, &pfx->ndpr_mask))
13788 /* no prefix entry in the prefix list */
13791 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13792 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13796 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13797 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13799 /* search installed gateway from prefix entry */
13800 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13801 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13802 gw6.sin6_family = AF_INET6;
13803 gw6.sin6_len = sizeof(struct sockaddr_in6);
13804 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13805 sizeof(struct in6_addr));
13806 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13807 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13808 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13809 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13810 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13812 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13817 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13823 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13826 struct sockaddr_in *sin, *mask;
13827 struct ifaddr *ifa;
13828 struct in_addr srcnetaddr, gwnetaddr;
13830 if (ro == NULL || ro->ro_rt == NULL ||
13831 sifa->address.sa.sa_family != AF_INET) {
13834 ifa = (struct ifaddr *)sifa->ifa;
13835 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13836 sin = &sifa->address.sin;
13837 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13838 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13839 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13840 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13842 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13843 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13844 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13845 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13846 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13847 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {