2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
56 #include <netinet/udp_var.h>
57 #include <machine/in_cksum.h>
61 #define SCTP_MAX_GAPS_INARRAY 4
63 uint8_t right_edge; /* mergable on the right edge */
64 uint8_t left_edge; /* mergable on the left edge */
67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
70 const struct sack_track sack_array[256] = {
71 {0, 0, 0, 0, /* 0x00 */
78 {1, 0, 1, 0, /* 0x01 */
85 {0, 0, 1, 0, /* 0x02 */
92 {1, 0, 1, 0, /* 0x03 */
99 {0, 0, 1, 0, /* 0x04 */
106 {1, 0, 2, 0, /* 0x05 */
113 {0, 0, 1, 0, /* 0x06 */
120 {1, 0, 1, 0, /* 0x07 */
127 {0, 0, 1, 0, /* 0x08 */
134 {1, 0, 2, 0, /* 0x09 */
141 {0, 0, 2, 0, /* 0x0a */
148 {1, 0, 2, 0, /* 0x0b */
155 {0, 0, 1, 0, /* 0x0c */
162 {1, 0, 2, 0, /* 0x0d */
169 {0, 0, 1, 0, /* 0x0e */
176 {1, 0, 1, 0, /* 0x0f */
183 {0, 0, 1, 0, /* 0x10 */
190 {1, 0, 2, 0, /* 0x11 */
197 {0, 0, 2, 0, /* 0x12 */
204 {1, 0, 2, 0, /* 0x13 */
211 {0, 0, 2, 0, /* 0x14 */
218 {1, 0, 3, 0, /* 0x15 */
225 {0, 0, 2, 0, /* 0x16 */
232 {1, 0, 2, 0, /* 0x17 */
239 {0, 0, 1, 0, /* 0x18 */
246 {1, 0, 2, 0, /* 0x19 */
253 {0, 0, 2, 0, /* 0x1a */
260 {1, 0, 2, 0, /* 0x1b */
267 {0, 0, 1, 0, /* 0x1c */
274 {1, 0, 2, 0, /* 0x1d */
281 {0, 0, 1, 0, /* 0x1e */
288 {1, 0, 1, 0, /* 0x1f */
295 {0, 0, 1, 0, /* 0x20 */
302 {1, 0, 2, 0, /* 0x21 */
309 {0, 0, 2, 0, /* 0x22 */
316 {1, 0, 2, 0, /* 0x23 */
323 {0, 0, 2, 0, /* 0x24 */
330 {1, 0, 3, 0, /* 0x25 */
337 {0, 0, 2, 0, /* 0x26 */
344 {1, 0, 2, 0, /* 0x27 */
351 {0, 0, 2, 0, /* 0x28 */
358 {1, 0, 3, 0, /* 0x29 */
365 {0, 0, 3, 0, /* 0x2a */
372 {1, 0, 3, 0, /* 0x2b */
379 {0, 0, 2, 0, /* 0x2c */
386 {1, 0, 3, 0, /* 0x2d */
393 {0, 0, 2, 0, /* 0x2e */
400 {1, 0, 2, 0, /* 0x2f */
407 {0, 0, 1, 0, /* 0x30 */
414 {1, 0, 2, 0, /* 0x31 */
421 {0, 0, 2, 0, /* 0x32 */
428 {1, 0, 2, 0, /* 0x33 */
435 {0, 0, 2, 0, /* 0x34 */
442 {1, 0, 3, 0, /* 0x35 */
449 {0, 0, 2, 0, /* 0x36 */
456 {1, 0, 2, 0, /* 0x37 */
463 {0, 0, 1, 0, /* 0x38 */
470 {1, 0, 2, 0, /* 0x39 */
477 {0, 0, 2, 0, /* 0x3a */
484 {1, 0, 2, 0, /* 0x3b */
491 {0, 0, 1, 0, /* 0x3c */
498 {1, 0, 2, 0, /* 0x3d */
505 {0, 0, 1, 0, /* 0x3e */
512 {1, 0, 1, 0, /* 0x3f */
519 {0, 0, 1, 0, /* 0x40 */
526 {1, 0, 2, 0, /* 0x41 */
533 {0, 0, 2, 0, /* 0x42 */
540 {1, 0, 2, 0, /* 0x43 */
547 {0, 0, 2, 0, /* 0x44 */
554 {1, 0, 3, 0, /* 0x45 */
561 {0, 0, 2, 0, /* 0x46 */
568 {1, 0, 2, 0, /* 0x47 */
575 {0, 0, 2, 0, /* 0x48 */
582 {1, 0, 3, 0, /* 0x49 */
589 {0, 0, 3, 0, /* 0x4a */
596 {1, 0, 3, 0, /* 0x4b */
603 {0, 0, 2, 0, /* 0x4c */
610 {1, 0, 3, 0, /* 0x4d */
617 {0, 0, 2, 0, /* 0x4e */
624 {1, 0, 2, 0, /* 0x4f */
631 {0, 0, 2, 0, /* 0x50 */
638 {1, 0, 3, 0, /* 0x51 */
645 {0, 0, 3, 0, /* 0x52 */
652 {1, 0, 3, 0, /* 0x53 */
659 {0, 0, 3, 0, /* 0x54 */
666 {1, 0, 4, 0, /* 0x55 */
673 {0, 0, 3, 0, /* 0x56 */
680 {1, 0, 3, 0, /* 0x57 */
687 {0, 0, 2, 0, /* 0x58 */
694 {1, 0, 3, 0, /* 0x59 */
701 {0, 0, 3, 0, /* 0x5a */
708 {1, 0, 3, 0, /* 0x5b */
715 {0, 0, 2, 0, /* 0x5c */
722 {1, 0, 3, 0, /* 0x5d */
729 {0, 0, 2, 0, /* 0x5e */
736 {1, 0, 2, 0, /* 0x5f */
743 {0, 0, 1, 0, /* 0x60 */
750 {1, 0, 2, 0, /* 0x61 */
757 {0, 0, 2, 0, /* 0x62 */
764 {1, 0, 2, 0, /* 0x63 */
771 {0, 0, 2, 0, /* 0x64 */
778 {1, 0, 3, 0, /* 0x65 */
785 {0, 0, 2, 0, /* 0x66 */
792 {1, 0, 2, 0, /* 0x67 */
799 {0, 0, 2, 0, /* 0x68 */
806 {1, 0, 3, 0, /* 0x69 */
813 {0, 0, 3, 0, /* 0x6a */
820 {1, 0, 3, 0, /* 0x6b */
827 {0, 0, 2, 0, /* 0x6c */
834 {1, 0, 3, 0, /* 0x6d */
841 {0, 0, 2, 0, /* 0x6e */
848 {1, 0, 2, 0, /* 0x6f */
855 {0, 0, 1, 0, /* 0x70 */
862 {1, 0, 2, 0, /* 0x71 */
869 {0, 0, 2, 0, /* 0x72 */
876 {1, 0, 2, 0, /* 0x73 */
883 {0, 0, 2, 0, /* 0x74 */
890 {1, 0, 3, 0, /* 0x75 */
897 {0, 0, 2, 0, /* 0x76 */
904 {1, 0, 2, 0, /* 0x77 */
911 {0, 0, 1, 0, /* 0x78 */
918 {1, 0, 2, 0, /* 0x79 */
925 {0, 0, 2, 0, /* 0x7a */
932 {1, 0, 2, 0, /* 0x7b */
939 {0, 0, 1, 0, /* 0x7c */
946 {1, 0, 2, 0, /* 0x7d */
953 {0, 0, 1, 0, /* 0x7e */
960 {1, 0, 1, 0, /* 0x7f */
967 {0, 1, 1, 0, /* 0x80 */
974 {1, 1, 2, 0, /* 0x81 */
981 {0, 1, 2, 0, /* 0x82 */
988 {1, 1, 2, 0, /* 0x83 */
995 {0, 1, 2, 0, /* 0x84 */
1002 {1, 1, 3, 0, /* 0x85 */
1009 {0, 1, 2, 0, /* 0x86 */
1016 {1, 1, 2, 0, /* 0x87 */
1023 {0, 1, 2, 0, /* 0x88 */
1030 {1, 1, 3, 0, /* 0x89 */
1037 {0, 1, 3, 0, /* 0x8a */
1044 {1, 1, 3, 0, /* 0x8b */
1051 {0, 1, 2, 0, /* 0x8c */
1058 {1, 1, 3, 0, /* 0x8d */
1065 {0, 1, 2, 0, /* 0x8e */
1072 {1, 1, 2, 0, /* 0x8f */
1079 {0, 1, 2, 0, /* 0x90 */
1086 {1, 1, 3, 0, /* 0x91 */
1093 {0, 1, 3, 0, /* 0x92 */
1100 {1, 1, 3, 0, /* 0x93 */
1107 {0, 1, 3, 0, /* 0x94 */
1114 {1, 1, 4, 0, /* 0x95 */
1121 {0, 1, 3, 0, /* 0x96 */
1128 {1, 1, 3, 0, /* 0x97 */
1135 {0, 1, 2, 0, /* 0x98 */
1142 {1, 1, 3, 0, /* 0x99 */
1149 {0, 1, 3, 0, /* 0x9a */
1156 {1, 1, 3, 0, /* 0x9b */
1163 {0, 1, 2, 0, /* 0x9c */
1170 {1, 1, 3, 0, /* 0x9d */
1177 {0, 1, 2, 0, /* 0x9e */
1184 {1, 1, 2, 0, /* 0x9f */
1191 {0, 1, 2, 0, /* 0xa0 */
1198 {1, 1, 3, 0, /* 0xa1 */
1205 {0, 1, 3, 0, /* 0xa2 */
1212 {1, 1, 3, 0, /* 0xa3 */
1219 {0, 1, 3, 0, /* 0xa4 */
1226 {1, 1, 4, 0, /* 0xa5 */
1233 {0, 1, 3, 0, /* 0xa6 */
1240 {1, 1, 3, 0, /* 0xa7 */
1247 {0, 1, 3, 0, /* 0xa8 */
1254 {1, 1, 4, 0, /* 0xa9 */
1261 {0, 1, 4, 0, /* 0xaa */
1268 {1, 1, 4, 0, /* 0xab */
1275 {0, 1, 3, 0, /* 0xac */
1282 {1, 1, 4, 0, /* 0xad */
1289 {0, 1, 3, 0, /* 0xae */
1296 {1, 1, 3, 0, /* 0xaf */
1303 {0, 1, 2, 0, /* 0xb0 */
1310 {1, 1, 3, 0, /* 0xb1 */
1317 {0, 1, 3, 0, /* 0xb2 */
1324 {1, 1, 3, 0, /* 0xb3 */
1331 {0, 1, 3, 0, /* 0xb4 */
1338 {1, 1, 4, 0, /* 0xb5 */
1345 {0, 1, 3, 0, /* 0xb6 */
1352 {1, 1, 3, 0, /* 0xb7 */
1359 {0, 1, 2, 0, /* 0xb8 */
1366 {1, 1, 3, 0, /* 0xb9 */
1373 {0, 1, 3, 0, /* 0xba */
1380 {1, 1, 3, 0, /* 0xbb */
1387 {0, 1, 2, 0, /* 0xbc */
1394 {1, 1, 3, 0, /* 0xbd */
1401 {0, 1, 2, 0, /* 0xbe */
1408 {1, 1, 2, 0, /* 0xbf */
1415 {0, 1, 1, 0, /* 0xc0 */
1422 {1, 1, 2, 0, /* 0xc1 */
1429 {0, 1, 2, 0, /* 0xc2 */
1436 {1, 1, 2, 0, /* 0xc3 */
1443 {0, 1, 2, 0, /* 0xc4 */
1450 {1, 1, 3, 0, /* 0xc5 */
1457 {0, 1, 2, 0, /* 0xc6 */
1464 {1, 1, 2, 0, /* 0xc7 */
1471 {0, 1, 2, 0, /* 0xc8 */
1478 {1, 1, 3, 0, /* 0xc9 */
1485 {0, 1, 3, 0, /* 0xca */
1492 {1, 1, 3, 0, /* 0xcb */
1499 {0, 1, 2, 0, /* 0xcc */
1506 {1, 1, 3, 0, /* 0xcd */
1513 {0, 1, 2, 0, /* 0xce */
1520 {1, 1, 2, 0, /* 0xcf */
1527 {0, 1, 2, 0, /* 0xd0 */
1534 {1, 1, 3, 0, /* 0xd1 */
1541 {0, 1, 3, 0, /* 0xd2 */
1548 {1, 1, 3, 0, /* 0xd3 */
1555 {0, 1, 3, 0, /* 0xd4 */
1562 {1, 1, 4, 0, /* 0xd5 */
1569 {0, 1, 3, 0, /* 0xd6 */
1576 {1, 1, 3, 0, /* 0xd7 */
1583 {0, 1, 2, 0, /* 0xd8 */
1590 {1, 1, 3, 0, /* 0xd9 */
1597 {0, 1, 3, 0, /* 0xda */
1604 {1, 1, 3, 0, /* 0xdb */
1611 {0, 1, 2, 0, /* 0xdc */
1618 {1, 1, 3, 0, /* 0xdd */
1625 {0, 1, 2, 0, /* 0xde */
1632 {1, 1, 2, 0, /* 0xdf */
1639 {0, 1, 1, 0, /* 0xe0 */
1646 {1, 1, 2, 0, /* 0xe1 */
1653 {0, 1, 2, 0, /* 0xe2 */
1660 {1, 1, 2, 0, /* 0xe3 */
1667 {0, 1, 2, 0, /* 0xe4 */
1674 {1, 1, 3, 0, /* 0xe5 */
1681 {0, 1, 2, 0, /* 0xe6 */
1688 {1, 1, 2, 0, /* 0xe7 */
1695 {0, 1, 2, 0, /* 0xe8 */
1702 {1, 1, 3, 0, /* 0xe9 */
1709 {0, 1, 3, 0, /* 0xea */
1716 {1, 1, 3, 0, /* 0xeb */
1723 {0, 1, 2, 0, /* 0xec */
1730 {1, 1, 3, 0, /* 0xed */
1737 {0, 1, 2, 0, /* 0xee */
1744 {1, 1, 2, 0, /* 0xef */
1751 {0, 1, 1, 0, /* 0xf0 */
1758 {1, 1, 2, 0, /* 0xf1 */
1765 {0, 1, 2, 0, /* 0xf2 */
1772 {1, 1, 2, 0, /* 0xf3 */
1779 {0, 1, 2, 0, /* 0xf4 */
1786 {1, 1, 3, 0, /* 0xf5 */
1793 {0, 1, 2, 0, /* 0xf6 */
1800 {1, 1, 2, 0, /* 0xf7 */
1807 {0, 1, 1, 0, /* 0xf8 */
1814 {1, 1, 2, 0, /* 0xf9 */
1821 {0, 1, 2, 0, /* 0xfa */
1828 {1, 1, 2, 0, /* 0xfb */
1835 {0, 1, 1, 0, /* 0xfc */
1842 {1, 1, 2, 0, /* 0xfd */
1849 {0, 1, 1, 0, /* 0xfe */
1856 {1, 1, 1, 0, /* 0xff */
1867 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1868 struct sctp_scoping *scope,
1871 if ((scope->loopback_scope == 0) &&
1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1874 * skip loopback if not in scope *
1878 switch (ifa->address.sa.sa_family) {
1881 if (scope->ipv4_addr_legal) {
1882 struct sockaddr_in *sin;
1884 sin = &ifa->address.sin;
1885 if (sin->sin_addr.s_addr == 0) {
1886 /* not in scope , unspecified */
1889 if ((scope->ipv4_local_scope == 0) &&
1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1891 /* private address not in scope */
1901 if (scope->ipv6_addr_legal) {
1902 struct sockaddr_in6 *sin6;
1905 * Must update the flags, bummer, which means any
1906 * IFA locks must now be applied HERE <->
1909 sctp_gather_internal_ifa_flags(ifa);
1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1914 /* ok to use deprecated addresses? */
1915 sin6 = &ifa->address.sin6;
1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1917 /* skip unspecifed addresses */
1920 if ( /* (local_scope == 0) && */
1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1924 if ((scope->site_scope == 0) &&
1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1939 static struct mbuf *
1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1942 #if defined(INET) || defined(INET6)
1943 struct sctp_paramhdr *parmh;
1949 switch (ifa->address.sa.sa_family) {
1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1963 #if defined(INET) || defined(INET6)
1964 if (M_TRAILINGSPACE(m) >= plen) {
1965 /* easy side we just drop it on the end */
1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1969 /* Need more space */
1971 while (SCTP_BUF_NEXT(mret) != NULL) {
1972 mret = SCTP_BUF_NEXT(mret);
1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1975 if (SCTP_BUF_NEXT(mret) == NULL) {
1976 /* We are hosed, can't add more addresses */
1979 mret = SCTP_BUF_NEXT(mret);
1980 parmh = mtod(mret, struct sctp_paramhdr *);
1982 /* now add the parameter */
1983 switch (ifa->address.sa.sa_family) {
1987 struct sctp_ipv4addr_param *ipv4p;
1988 struct sockaddr_in *sin;
1990 sin = &ifa->address.sin;
1991 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1993 parmh->param_length = htons(plen);
1994 ipv4p->addr = sin->sin_addr.s_addr;
1995 SCTP_BUF_LEN(mret) += plen;
2002 struct sctp_ipv6addr_param *ipv6p;
2003 struct sockaddr_in6 *sin6;
2005 sin6 = &ifa->address.sin6;
2006 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2008 parmh->param_length = htons(plen);
2009 memcpy(ipv6p->addr, &sin6->sin6_addr,
2010 sizeof(ipv6p->addr));
2011 /* clear embedded scope in the address */
2012 in6_clearscope((struct in6_addr *)ipv6p->addr);
2013 SCTP_BUF_LEN(mret) += plen;
2029 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2030 struct sctp_scoping *scope,
2031 struct mbuf *m_at, int cnt_inits_to,
2032 uint16_t * padding_len, uint16_t * chunk_len)
2034 struct sctp_vrf *vrf = NULL;
2035 int cnt, limit_out = 0, total_count;
2038 vrf_id = inp->def_vrf_id;
2039 SCTP_IPI_ADDR_RLOCK();
2040 vrf = sctp_find_vrf(vrf_id);
2042 SCTP_IPI_ADDR_RUNLOCK();
2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2046 struct sctp_ifa *sctp_ifap;
2047 struct sctp_ifn *sctp_ifnp;
2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2052 cnt = SCTP_ADDRESS_LIMIT;
2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2056 if ((scope->loopback_scope == 0) &&
2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2059 * Skip loopback devices if loopback_scope
2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2068 &sctp_ifap->address.sin.sin_addr) != 0)) {
2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2086 if (cnt > SCTP_ADDRESS_LIMIT) {
2090 if (cnt > SCTP_ADDRESS_LIMIT) {
2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2099 if ((scope->loopback_scope == 0) &&
2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2102 * Skip loopback devices if
2103 * loopback_scope not set
2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2111 &sctp_ifap->address.sin.sin_addr) != 0)) {
2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2125 if (sctp_is_address_in_scope(sctp_ifap,
2129 if ((chunk_len != NULL) &&
2130 (padding_len != NULL) &&
2131 (*padding_len > 0)) {
2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2133 SCTP_BUF_LEN(m_at) += *padding_len;
2134 *chunk_len += *padding_len;
2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2148 if (total_count > SCTP_ADDRESS_LIMIT) {
2149 /* No more addresses */
2157 struct sctp_laddr *laddr;
2160 /* First, how many ? */
2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2162 if (laddr->ifa == NULL) {
2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2167 * Address being deleted by the system, dont
2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2173 * Address being deleted on this ep don't
2178 if (sctp_is_address_in_scope(laddr->ifa,
2185 * To get through a NAT we only list addresses if we have
2186 * more than one. That way if you just bind a single address
2187 * we let the source of the init dictate our address.
2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2192 if (laddr->ifa == NULL) {
2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2198 if (sctp_is_address_in_scope(laddr->ifa,
2202 if ((chunk_len != NULL) &&
2203 (padding_len != NULL) &&
2204 (*padding_len > 0)) {
2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2206 SCTP_BUF_LEN(m_at) += *padding_len;
2207 *chunk_len += *padding_len;
2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2212 if (cnt >= SCTP_ADDRESS_LIMIT) {
2218 SCTP_IPI_ADDR_RUNLOCK();
2222 static struct sctp_ifa *
2223 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2224 uint8_t dest_is_loop,
2225 uint8_t dest_is_priv,
2228 uint8_t dest_is_global = 0;
2230 /* dest_is_priv is true if destination is a private address */
2231 /* dest_is_loop is true if destination is a loopback addresses */
2234 * Here we determine if its a preferred address. A preferred address
2235 * means it is the same scope or higher scope then the destination.
2236 * L = loopback, P = private, G = global
2237 * -----------------------------------------
2238 * src | dest | result
2239 * ----------------------------------------
2241 * -----------------------------------------
2242 * P | L | yes-v4 no-v6
2243 * -----------------------------------------
2244 * G | L | yes-v4 no-v6
2245 * -----------------------------------------
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2257 * -----------------------------------------
2260 if (ifa->address.sa.sa_family != fam) {
2261 /* forget mis-matched family */
2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2269 /* Ok the address may be ok */
2271 if (fam == AF_INET6) {
2272 /* ok to use deprecated addresses? no lets not! */
2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2277 if (ifa->src_is_priv && !ifa->src_is_loop) {
2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2283 if (ifa->src_is_glob) {
2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2292 * Now that we know what is what, implement or table this could in
2293 * theory be done slicker (it used to be), but this is
2294 * straightforward and easier to validate :-)
2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2299 dest_is_loop, dest_is_priv, dest_is_global);
2301 if ((ifa->src_is_loop) && (dest_is_priv)) {
2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2305 if ((ifa->src_is_glob) && (dest_is_priv)) {
2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2309 if ((ifa->src_is_loop) && (dest_is_global)) {
2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2313 if ((ifa->src_is_priv) && (dest_is_global)) {
2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2318 /* its a preferred address */
2322 static struct sctp_ifa *
2323 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2324 uint8_t dest_is_loop,
2325 uint8_t dest_is_priv,
2328 uint8_t dest_is_global = 0;
2331 * Here we determine if its a acceptable address. A acceptable
2332 * address means it is the same scope or higher scope but we can
2333 * allow for NAT which means its ok to have a global dest and a
2336 * L = loopback, P = private, G = global
2337 * -----------------------------------------
2338 * src | dest | result
2339 * -----------------------------------------
2341 * -----------------------------------------
2342 * P | L | yes-v4 no-v6
2343 * -----------------------------------------
2345 * -----------------------------------------
2347 * -----------------------------------------
2349 * -----------------------------------------
2350 * G | P | yes - May not work
2351 * -----------------------------------------
2353 * -----------------------------------------
2354 * P | G | yes - May not work
2355 * -----------------------------------------
2357 * -----------------------------------------
2360 if (ifa->address.sa.sa_family != fam) {
2361 /* forget non matching family */
2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2363 ifa->address.sa.sa_family, fam);
2366 /* Ok the address may be ok */
2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2369 dest_is_loop, dest_is_priv);
2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2374 if (fam == AF_INET6) {
2375 /* ok to use deprecated addresses? */
2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2379 if (ifa->src_is_priv) {
2380 /* Special case, linklocal to loop */
2387 * Now that we know what is what, implement our table. This could in
2388 * theory be done slicker (it used to be), but this is
2389 * straightforward and easier to validate :-)
2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2404 /* its an acceptable address */
2409 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2411 struct sctp_laddr *laddr;
2414 /* There are no restrictions, no TCB :-) */
2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2418 if (laddr->ifa == NULL) {
2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2423 if (laddr->ifa == ifa) {
2424 /* Yes it is on the list */
2433 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2435 struct sctp_laddr *laddr;
2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2440 if (laddr->ifa == NULL) {
2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2445 if ((laddr->ifa == ifa) && laddr->action == 0)
2454 static struct sctp_ifa *
2455 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2458 int non_asoc_addr_ok,
2459 uint8_t dest_is_priv,
2460 uint8_t dest_is_loop,
2463 struct sctp_laddr *laddr, *starting_point;
2466 struct sctp_ifn *sctp_ifn;
2467 struct sctp_ifa *sctp_ifa, *sifa;
2468 struct sctp_vrf *vrf;
2471 vrf = sctp_find_vrf(vrf_id);
2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2479 * first question, is the ifn we will emit on in our list, if so, we
2480 * want such an address. Note that we first looked for a preferred
2484 /* is a preferred one on the interface we route out? */
2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2489 &sctp_ifa->address.sin.sin_addr) != 0)) {
2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2501 (non_asoc_addr_ok == 0))
2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2508 if (sctp_is_addr_in_ep(inp, sifa)) {
2509 atomic_add_int(&sifa->refcount, 1);
2515 * ok, now we now need to find one on the list of the addresses. We
2516 * can't get one on the emitting interface so let's find first a
2517 * preferred one. If not that an acceptable one otherwise... we
2520 starting_point = inp->next_addr_touse;
2522 if (inp->next_addr_touse == NULL) {
2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2526 for (laddr = inp->next_addr_touse; laddr;
2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2528 if (laddr->ifa == NULL) {
2529 /* address has been removed */
2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2533 /* address is being deleted */
2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2540 atomic_add_int(&sifa->refcount, 1);
2543 if (resettotop == 0) {
2544 inp->next_addr_touse = NULL;
2547 inp->next_addr_touse = starting_point;
2550 if (inp->next_addr_touse == NULL) {
2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2554 /* ok, what about an acceptable address in the inp */
2555 for (laddr = inp->next_addr_touse; laddr;
2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2557 if (laddr->ifa == NULL) {
2558 /* address has been removed */
2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2562 /* address is being deleted */
2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2569 atomic_add_int(&sifa->refcount, 1);
2572 if (resettotop == 0) {
2573 inp->next_addr_touse = NULL;
2574 goto once_again_too;
2577 * no address bound can be a source for the destination we are in
2585 static struct sctp_ifa *
2586 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2587 struct sctp_tcb *stcb,
2590 uint8_t dest_is_priv,
2591 uint8_t dest_is_loop,
2592 int non_asoc_addr_ok,
2595 struct sctp_laddr *laddr, *starting_point;
2597 struct sctp_ifn *sctp_ifn;
2598 struct sctp_ifa *sctp_ifa, *sifa;
2599 uint8_t start_at_beginning = 0;
2600 struct sctp_vrf *vrf;
2604 * first question, is the ifn we will emit on in our list, if so, we
2607 vrf = sctp_find_vrf(vrf_id);
2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2616 * first question, is the ifn we will emit on in our list? If so,
2617 * we want that one. First we look for a preferred. Second, we go
2618 * for an acceptable.
2621 /* first try for a preferred address on the ep */
2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2626 &sctp_ifa->address.sin.sin_addr) != 0)) {
2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2643 if (((non_asoc_addr_ok == 0) &&
2644 (sctp_is_addr_restricted(stcb, sifa))) ||
2645 (non_asoc_addr_ok &&
2646 (sctp_is_addr_restricted(stcb, sifa)) &&
2647 (!sctp_is_addr_pending(stcb, sifa)))) {
2648 /* on the no-no list */
2651 atomic_add_int(&sifa->refcount, 1);
2655 /* next try for an acceptable address on the ep */
2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2660 &sctp_ifa->address.sin.sin_addr) != 0)) {
2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2677 if (((non_asoc_addr_ok == 0) &&
2678 (sctp_is_addr_restricted(stcb, sifa))) ||
2679 (non_asoc_addr_ok &&
2680 (sctp_is_addr_restricted(stcb, sifa)) &&
2681 (!sctp_is_addr_pending(stcb, sifa)))) {
2682 /* on the no-no list */
2685 atomic_add_int(&sifa->refcount, 1);
2692 * if we can't find one like that then we must look at all addresses
2693 * bound to pick one at first preferable then secondly acceptable.
2695 starting_point = stcb->asoc.last_used_address;
2697 if (stcb->asoc.last_used_address == NULL) {
2698 start_at_beginning = 1;
2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2701 /* search beginning with the last used address */
2702 for (laddr = stcb->asoc.last_used_address; laddr;
2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2704 if (laddr->ifa == NULL) {
2705 /* address has been removed */
2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2709 /* address is being deleted */
2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2715 if (((non_asoc_addr_ok == 0) &&
2716 (sctp_is_addr_restricted(stcb, sifa))) ||
2717 (non_asoc_addr_ok &&
2718 (sctp_is_addr_restricted(stcb, sifa)) &&
2719 (!sctp_is_addr_pending(stcb, sifa)))) {
2720 /* on the no-no list */
2723 stcb->asoc.last_used_address = laddr;
2724 atomic_add_int(&sifa->refcount, 1);
2727 if (start_at_beginning == 0) {
2728 stcb->asoc.last_used_address = NULL;
2729 goto sctp_from_the_top;
2731 /* now try for any higher scope than the destination */
2732 stcb->asoc.last_used_address = starting_point;
2733 start_at_beginning = 0;
2735 if (stcb->asoc.last_used_address == NULL) {
2736 start_at_beginning = 1;
2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2739 /* search beginning with the last used address */
2740 for (laddr = stcb->asoc.last_used_address; laddr;
2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2742 if (laddr->ifa == NULL) {
2743 /* address has been removed */
2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2747 /* address is being deleted */
2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2754 if (((non_asoc_addr_ok == 0) &&
2755 (sctp_is_addr_restricted(stcb, sifa))) ||
2756 (non_asoc_addr_ok &&
2757 (sctp_is_addr_restricted(stcb, sifa)) &&
2758 (!sctp_is_addr_pending(stcb, sifa)))) {
2759 /* on the no-no list */
2762 stcb->asoc.last_used_address = laddr;
2763 atomic_add_int(&sifa->refcount, 1);
2766 if (start_at_beginning == 0) {
2767 stcb->asoc.last_used_address = NULL;
2768 goto sctp_from_the_top2;
2773 static struct sctp_ifa *
2774 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2775 struct sctp_inpcb *inp,
2776 struct sctp_tcb *stcb,
2777 int non_asoc_addr_ok,
2778 uint8_t dest_is_loop,
2779 uint8_t dest_is_priv,
2785 struct sctp_ifa *ifa, *sifa;
2786 int num_eligible_addr = 0;
2789 struct sockaddr_in6 sin6, lsa6;
2791 if (fam == AF_INET6) {
2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2793 (void)sa6_recoverscope(&sin6);
2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2798 if ((ifa->address.sa.sa_family == AF_INET) &&
2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin.sin_addr) != 0)) {
2805 if ((ifa->address.sa.sa_family == AF_INET6) &&
2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2807 &ifa->address.sin6.sin6_addr) != 0)) {
2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2812 (non_asoc_addr_ok == 0))
2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2819 if (fam == AF_INET6 &&
2821 sifa->src_is_loop && sifa->src_is_priv) {
2823 * don't allow fe80::1 to be a src on loop ::1, we
2824 * don't list it to the peer so we will get an
2829 if (fam == AF_INET6 &&
2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2833 * link-local <-> link-local must belong to the same
2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2837 (void)sa6_recoverscope(&lsa6);
2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2845 * Check if the IPv6 address matches to next-hop. In the
2846 * mobile case, old IPv6 address may be not deleted from the
2847 * interface. Then, the interface has previous and new
2848 * addresses. We should use one corresponding to the
2849 * next-hop. (by micchie)
2852 if (stcb && fam == AF_INET6 &&
2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2861 /* Avoid topologically incorrect IPv4 address */
2862 if (stcb && fam == AF_INET &&
2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2873 if (((non_asoc_addr_ok == 0) &&
2874 (sctp_is_addr_restricted(stcb, sifa))) ||
2875 (non_asoc_addr_ok &&
2876 (sctp_is_addr_restricted(stcb, sifa)) &&
2877 (!sctp_is_addr_pending(stcb, sifa)))) {
2879 * It is restricted for some reason..
2880 * probably not yet added.
2885 if (num_eligible_addr >= addr_wanted) {
2888 num_eligible_addr++;
2895 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2896 struct sctp_inpcb *inp,
2897 struct sctp_tcb *stcb,
2898 int non_asoc_addr_ok,
2899 uint8_t dest_is_loop,
2900 uint8_t dest_is_priv,
2903 struct sctp_ifa *ifa, *sifa;
2904 int num_eligible_addr = 0;
2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2908 if ((ifa->address.sa.sa_family == AF_INET) &&
2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin.sin_addr) != 0)) {
2915 if ((ifa->address.sa.sa_family == AF_INET6) &&
2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2918 &ifa->address.sin6.sin6_addr) != 0)) {
2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2923 (non_asoc_addr_ok == 0)) {
2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2935 if (((non_asoc_addr_ok == 0) &&
2936 (sctp_is_addr_restricted(stcb, sifa))) ||
2937 (non_asoc_addr_ok &&
2938 (sctp_is_addr_restricted(stcb, sifa)) &&
2939 (!sctp_is_addr_pending(stcb, sifa)))) {
2941 * It is restricted for some reason..
2942 * probably not yet added.
2947 num_eligible_addr++;
2949 return (num_eligible_addr);
2952 static struct sctp_ifa *
2953 sctp_choose_boundall(struct sctp_inpcb *inp,
2954 struct sctp_tcb *stcb,
2955 struct sctp_nets *net,
2958 uint8_t dest_is_priv,
2959 uint8_t dest_is_loop,
2960 int non_asoc_addr_ok,
2963 int cur_addr_num = 0, num_preferred = 0;
2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2966 struct sctp_ifa *sctp_ifa, *sifa;
2968 struct sctp_vrf *vrf;
2976 * For boundall we can use any address in the association.
2977 * If non_asoc_addr_ok is set we can use any address (at least in
2978 * theory). So we look for preferred addresses first. If we find one,
2979 * we use it. Otherwise we next try to get an address on the
2980 * interface, which we should be able to do (unless non_asoc_addr_ok
2981 * is false and we are routed out that way). In these cases where we
2982 * can't use the address of the interface we go through all the
2983 * ifn's looking for an address we can use and fill that in. Punting
2984 * means we send back address 0, which will probably cause problems
2985 * actually since then IP will fill in the address of the route ifn,
2986 * which means we probably already rejected it.. i.e. here comes an
2989 vrf = sctp_find_vrf(vrf_id);
2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2997 if (sctp_ifn == NULL) {
2998 /* ?? We don't have this guy ?? */
2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
3000 goto bound_all_plan_b;
3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3003 ifn_index, sctp_ifn->ifn_name);
3006 cur_addr_num = net->indx_of_eligible_next_to_use;
3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3014 num_preferred, sctp_ifn->ifn_name);
3015 if (num_preferred == 0) {
3017 * no eligible addresses, we must use some other interface
3018 * address if we can find one.
3020 goto bound_all_plan_b;
3023 * Ok we have num_eligible_addr set with how many we can use, this
3024 * may vary from call to call due to addresses being deprecated
3027 if (cur_addr_num >= num_preferred) {
3031 * select the nth address from the list (where cur_addr_num is the
3032 * nth) and 0 is the first one, 1 is the second one etc...
3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3037 dest_is_priv, cur_addr_num, fam, ro);
3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3041 atomic_add_int(&sctp_ifa->refcount, 1);
3043 /* save off where the next one we will want */
3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3049 * plan_b: Look at all interfaces and find a preferred address. If
3050 * no preferred fall through to plan_c.
3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3056 sctp_ifn->ifn_name);
3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3058 /* wrong base scope */
3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3062 if ((sctp_ifn == looked_at) && looked_at) {
3063 /* already looked at this guy */
3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3068 dest_is_loop, dest_is_priv, fam);
3069 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3070 "Found ifn:%p %d preferred source addresses\n",
3071 ifn, num_preferred);
3072 if (num_preferred == 0) {
3073 /* None on this interface. */
3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3077 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3078 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3079 num_preferred, (void *)sctp_ifn, cur_addr_num);
3082 * Ok we have num_eligible_addr set with how many we can
3083 * use, this may vary from call to call due to addresses
3084 * being deprecated etc..
3086 if (cur_addr_num >= num_preferred) {
3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3090 dest_is_priv, cur_addr_num, fam, ro);
3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3102 atomic_add_int(&sifa->refcount, 1);
3106 again_with_private_addresses_allowed:
3108 /* plan_c: do we have an acceptable address on the emit interface */
3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3111 if (emit_ifn == NULL) {
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3120 &sctp_ifa->address.sin.sin_addr) != 0)) {
3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3134 (non_asoc_addr_ok == 0)) {
3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3150 if (((non_asoc_addr_ok == 0) &&
3151 (sctp_is_addr_restricted(stcb, sifa))) ||
3152 (non_asoc_addr_ok &&
3153 (sctp_is_addr_restricted(stcb, sifa)) &&
3154 (!sctp_is_addr_pending(stcb, sifa)))) {
3156 * It is restricted for some reason..
3157 * probably not yet added.
3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3164 atomic_add_int(&sifa->refcount, 1);
3169 * plan_d: We are in trouble. No preferred address on the emit
3170 * interface. And not even a preferred address on all interfaces. Go
3171 * out and see if we can find an acceptable address somewhere
3172 * amongst all interfaces.
3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3177 /* wrong base scope */
3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3184 &sctp_ifa->address.sin.sin_addr) != 0)) {
3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3196 (non_asoc_addr_ok == 0))
3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3208 if (((non_asoc_addr_ok == 0) &&
3209 (sctp_is_addr_restricted(stcb, sifa))) ||
3210 (non_asoc_addr_ok &&
3211 (sctp_is_addr_restricted(stcb, sifa)) &&
3212 (!sctp_is_addr_pending(stcb, sifa)))) {
3214 * It is restricted for some
3215 * reason.. probably not yet added.
3226 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3227 stcb->asoc.scope.ipv4_local_scope = 1;
3229 goto again_with_private_addresses_allowed;
3230 } else if (retried == 1) {
3231 stcb->asoc.scope.ipv4_local_scope = 0;
3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3241 /* wrong base scope */
3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3245 struct sctp_ifa *tmp_sifa;
3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3250 &sctp_ifa->address.sin.sin_addr) != 0)) {
3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3262 (non_asoc_addr_ok == 0))
3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3267 if (tmp_sifa == NULL) {
3270 if (tmp_sifa == sifa) {
3274 if (sctp_is_address_in_scope(tmp_sifa,
3275 &stcb->asoc.scope, 0) == 0) {
3278 if (((non_asoc_addr_ok == 0) &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3280 (non_asoc_addr_ok &&
3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3294 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3299 atomic_add_int(&sifa->refcount, 1);
3307 /* tcb may be NULL */
3309 sctp_source_address_selection(struct sctp_inpcb *inp,
3310 struct sctp_tcb *stcb,
3312 struct sctp_nets *net,
3313 int non_asoc_addr_ok, uint32_t vrf_id)
3315 struct sctp_ifa *answer;
3316 uint8_t dest_is_priv, dest_is_loop;
3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3330 * - Find the route if needed, cache if I can.
3331 * - Look at interface address in route, Is it in the bound list. If so we
3332 * have the best source.
3333 * - If not we must rotate amongst the addresses.
3337 * Do we need to pay attention to scope. We can have a private address
3338 * or a global address we are sourcing or sending to. So if we draw
3340 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3342 * ------------------------------------------
3343 * source * dest * result
3344 * -----------------------------------------
3345 * <a> Private * Global * NAT
3346 * -----------------------------------------
3347 * <b> Private * Private * No problem
3348 * -----------------------------------------
3349 * <c> Global * Private * Huh, How will this work?
3350 * -----------------------------------------
3351 * <d> Global * Global * No Problem
3352 *------------------------------------------
3353 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3355 *------------------------------------------
3356 * source * dest * result
3357 * -----------------------------------------
3358 * <a> Linklocal * Global *
3359 * -----------------------------------------
3360 * <b> Linklocal * Linklocal * No problem
3361 * -----------------------------------------
3362 * <c> Global * Linklocal * Huh, How will this work?
3363 * -----------------------------------------
3364 * <d> Global * Global * No Problem
3365 *------------------------------------------
3366 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3368 * And then we add to that what happens if there are multiple addresses
3369 * assigned to an interface. Remember the ifa on a ifn is a linked
3370 * list of addresses. So one interface can have more than one IP
3371 * address. What happens if we have both a private and a global
3372 * address? Do we then use context of destination to sort out which
3373 * one is best? And what about NAT's sending P->G may get you a NAT
3374 * translation, or should you select the G thats on the interface in
3379 * - count the number of addresses on the interface.
3380 * - if it is one, no problem except case <c>.
3381 * For <a> we will assume a NAT out there.
3382 * - if there are more than one, then we need to worry about scope P
3383 * or G. We should prefer G -> G and P -> P if possible.
3384 * Then as a secondary fall back to mixed types G->P being a last
3386 * - The above all works for bound all, but bound specific we need to
3387 * use the same concept but instead only consider the bound
3388 * addresses. If the bound set is NOT assigned to the interface then
3389 * we must use rotation amongst the bound addresses..
3391 if (ro->ro_rt == NULL) {
3393 * Need a route to cache.
3395 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3397 if (ro->ro_rt == NULL) {
3400 fam = ro->ro_dst.sa_family;
3401 dest_is_priv = dest_is_loop = 0;
3402 /* Setup our scopes for the destination */
3406 /* Scope based on outbound address */
3407 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3410 /* mark it as local */
3411 net->addr_is_local = 1;
3413 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3420 /* Scope based on outbound address */
3421 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3422 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3424 * If the address is a loopback address, which
3425 * consists of "::1" OR "fe80::1%lo0", we are
3426 * loopback scope. But we don't use dest_is_priv
3427 * (link local addresses).
3431 /* mark it as local */
3432 net->addr_is_local = 1;
3434 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3440 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3441 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3442 SCTP_IPI_ADDR_RLOCK();
3443 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3447 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3448 dest_is_priv, dest_is_loop,
3449 non_asoc_addr_ok, fam);
3450 SCTP_IPI_ADDR_RUNLOCK();
3457 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3458 vrf_id, dest_is_priv,
3460 non_asoc_addr_ok, fam);
3462 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3467 SCTP_IPI_ADDR_RUNLOCK();
3472 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3475 int tlen, at, found;
3476 struct sctp_sndinfo sndinfo;
3477 struct sctp_prinfo prinfo;
3478 struct sctp_authinfo authinfo;
3480 tlen = SCTP_BUF_LEN(control);
3484 * Independent of how many mbufs, find the c_type inside the control
3485 * structure and copy out the data.
3488 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3489 /* There is not enough room for one more. */
3492 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3493 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3494 /* We dont't have a complete CMSG header. */
3497 if (((int)cmh.cmsg_len + at) > tlen) {
3498 /* We don't have the complete CMSG. */
3501 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3502 ((c_type == cmh.cmsg_type) ||
3503 ((c_type == SCTP_SNDRCV) &&
3504 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3505 (cmh.cmsg_type == SCTP_PRINFO) ||
3506 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3507 if (c_type == cmh.cmsg_type) {
3508 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3511 /* It is exactly what we want. Copy it out. */
3512 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), (int)cpsize, (caddr_t)data);
3515 struct sctp_sndrcvinfo *sndrcvinfo;
3517 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3519 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3522 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3524 switch (cmh.cmsg_type) {
3526 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3529 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3530 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3531 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3532 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3533 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3534 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3537 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3540 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3541 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3542 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3544 sndrcvinfo->sinfo_timetolive = 0;
3546 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3549 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3552 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3553 sndrcvinfo->sinfo_keynumber_valid = 1;
3554 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3562 at += CMSG_ALIGN(cmh.cmsg_len);
3568 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3572 struct sctp_initmsg initmsg;
3575 struct sockaddr_in sin;
3579 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;
3622 #if defined(SCTP_DETAILED_STR_STATS)
3627 /* Default is NOT correct */
3628 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3629 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3630 SCTP_TCB_UNLOCK(stcb);
3631 SCTP_MALLOC(tmp_str,
3632 struct sctp_stream_out *,
3633 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3635 SCTP_TCB_LOCK(stcb);
3636 if (tmp_str != NULL) {
3637 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3638 stcb->asoc.strmout = tmp_str;
3639 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3641 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3643 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3644 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3645 stcb->asoc.strmout[i].chunks_on_queues = 0;
3646 stcb->asoc.strmout[i].next_mid_ordered = 0;
3647 stcb->asoc.strmout[i].next_mid_unordered = 0;
3648 #if defined(SCTP_DETAILED_STR_STATS)
3649 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3650 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3651 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3654 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3655 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3657 stcb->asoc.strmout[i].stream_no = i;
3658 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3659 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3660 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3665 case SCTP_DSTADDRV4:
3666 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3670 memset(&sin, 0, sizeof(struct sockaddr_in));
3671 sin.sin_family = AF_INET;
3672 sin.sin_len = sizeof(struct sockaddr_in);
3673 sin.sin_port = stcb->rport;
3674 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3675 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3676 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3677 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3681 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3682 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3689 case SCTP_DSTADDRV6:
3690 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3694 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3695 sin6.sin6_family = AF_INET6;
3696 sin6.sin6_len = sizeof(struct sockaddr_in6);
3697 sin6.sin6_port = stcb->rport;
3698 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3699 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3700 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3705 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3706 in6_sin6_2_sin(&sin, &sin6);
3707 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3708 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3709 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3713 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3714 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3720 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3721 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3731 at += CMSG_ALIGN(cmh.cmsg_len);
3736 static struct sctp_tcb *
3737 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3739 struct mbuf *control,
3740 struct sctp_nets **net_p,
3745 struct sctp_tcb *stcb;
3746 struct sockaddr *addr;
3749 struct sockaddr_in sin;
3753 struct sockaddr_in6 sin6;
3757 tlen = SCTP_BUF_LEN(control);
3760 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3761 /* There is not enough room for one more. */
3765 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3766 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3767 /* We dont't have a complete CMSG header. */
3771 if (((int)cmh.cmsg_len + at) > tlen) {
3772 /* We don't have the complete CMSG. */
3776 if (cmh.cmsg_level == IPPROTO_SCTP) {
3777 switch (cmh.cmsg_type) {
3779 case SCTP_DSTADDRV4:
3780 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3784 memset(&sin, 0, sizeof(struct sockaddr_in));
3785 sin.sin_family = AF_INET;
3786 sin.sin_len = sizeof(struct sockaddr_in);
3787 sin.sin_port = port;
3788 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3789 addr = (struct sockaddr *)&sin;
3793 case SCTP_DSTADDRV6:
3794 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3798 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3799 sin6.sin6_family = AF_INET6;
3800 sin6.sin6_len = sizeof(struct sockaddr_in6);
3801 sin6.sin6_port = port;
3802 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3804 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3805 in6_sin6_2_sin(&sin, &sin6);
3806 addr = (struct sockaddr *)&sin;
3809 addr = (struct sockaddr *)&sin6;
3817 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3823 at += CMSG_ALIGN(cmh.cmsg_len);
3828 static struct mbuf *
3829 sctp_add_cookie(struct mbuf *init, int init_offset,
3830 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3832 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3833 struct sctp_state_cookie *stc;
3834 struct sctp_paramhdr *ph;
3839 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3840 sizeof(struct sctp_paramhdr)), 0,
3841 M_NOWAIT, 1, MT_DATA);
3845 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3846 if (copy_init == NULL) {
3850 #ifdef SCTP_MBUF_LOGGING
3851 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3852 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3855 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3857 if (copy_initack == NULL) {
3859 sctp_m_freem(copy_init);
3862 #ifdef SCTP_MBUF_LOGGING
3863 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3864 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3867 /* easy side we just drop it on the end */
3868 ph = mtod(mret, struct sctp_paramhdr *);
3869 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3870 sizeof(struct sctp_paramhdr);
3871 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3872 sizeof(struct sctp_paramhdr));
3873 ph->param_type = htons(SCTP_STATE_COOKIE);
3874 ph->param_length = 0; /* fill in at the end */
3875 /* Fill in the stc cookie data */
3876 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3878 /* tack the INIT and then the INIT-ACK onto the chain */
3880 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3881 cookie_sz += SCTP_BUF_LEN(m_at);
3882 if (SCTP_BUF_NEXT(m_at) == NULL) {
3883 SCTP_BUF_NEXT(m_at) = copy_init;
3887 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3888 cookie_sz += SCTP_BUF_LEN(m_at);
3889 if (SCTP_BUF_NEXT(m_at) == NULL) {
3890 SCTP_BUF_NEXT(m_at) = copy_initack;
3894 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3895 cookie_sz += SCTP_BUF_LEN(m_at);
3896 if (SCTP_BUF_NEXT(m_at) == NULL) {
3900 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3902 /* no space, so free the entire chain */
3906 SCTP_BUF_LEN(sig) = 0;
3907 SCTP_BUF_NEXT(m_at) = sig;
3909 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3910 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3912 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3913 cookie_sz += SCTP_SIGNATURE_SIZE;
3914 ph->param_length = htons(cookie_sz);
3920 sctp_get_ect(struct sctp_tcb *stcb)
3922 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3923 return (SCTP_ECT0_BIT);
3929 #if defined(INET) || defined(INET6)
3931 sctp_handle_no_route(struct sctp_tcb *stcb,
3932 struct sctp_nets *net,
3935 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3939 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3940 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3941 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3942 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3943 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3947 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3948 net->dest_state &= ~SCTP_ADDR_PF;
3952 if (net == stcb->asoc.primary_destination) {
3953 /* need a new primary */
3954 struct sctp_nets *alt;
3956 alt = sctp_find_alternate_net(stcb, net, 0);
3958 if (stcb->asoc.alternate) {
3959 sctp_free_remote_addr(stcb->asoc.alternate);
3961 stcb->asoc.alternate = alt;
3962 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3963 if (net->ro._s_addr) {
3964 sctp_free_ifa(net->ro._s_addr);
3965 net->ro._s_addr = NULL;
3967 net->src_addr_selected = 0;
3977 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3978 struct sctp_tcb *stcb, /* may be NULL */
3979 struct sctp_nets *net,
3980 struct sockaddr *to,
3982 uint32_t auth_offset,
3983 struct sctp_auth_chunk *auth,
3984 uint16_t auth_keyid,
3985 int nofragment_flag,
3992 union sctp_sockstore *over_addr,
3993 uint8_t mflowtype, uint32_t mflowid,
3994 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3995 int so_locked SCTP_UNUSED
4000 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4003 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4004 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4005 * - fill in the HMAC digest of any AUTH chunk in the packet.
4006 * - calculate and fill in the SCTP checksum.
4007 * - prepend an IP address header.
4008 * - if boundall use INADDR_ANY.
4009 * - if boundspecific do source address selection.
4010 * - set fragmentation option for ipV4.
4011 * - On return from IP output, check/adjust mtu size of output
4012 * interface and smallest_mtu size as well.
4014 /* Will need ifdefs around this */
4016 struct sctphdr *sctphdr;
4020 #if defined(INET) || defined(INET6)
4024 #if defined(INET) || defined(INET6)
4026 sctp_route_t *ro = NULL;
4027 struct udphdr *udp = NULL;
4032 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4033 struct socket *so = NULL;
4037 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4038 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4042 #if defined(INET) || defined(INET6)
4044 vrf_id = stcb->asoc.vrf_id;
4046 vrf_id = inp->def_vrf_id;
4049 /* fill in the HMAC digest for any AUTH chunk in the packet */
4050 if ((auth != NULL) && (stcb != NULL)) {
4051 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4054 tos_value = net->dscp;
4056 tos_value = stcb->asoc.default_dscp;
4058 tos_value = inp->sctp_ep.default_dscp;
4061 switch (to->sa_family) {
4065 struct ip *ip = NULL;
4066 sctp_route_t iproute;
4069 len = SCTP_MIN_V4_OVERHEAD;
4071 len += sizeof(struct udphdr);
4073 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4076 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4079 SCTP_ALIGN_TO_END(newm, len);
4080 SCTP_BUF_LEN(newm) = len;
4081 SCTP_BUF_NEXT(newm) = m;
4084 m->m_pkthdr.flowid = net->flowid;
4085 M_HASHTYPE_SET(m, net->flowtype);
4087 m->m_pkthdr.flowid = mflowid;
4088 M_HASHTYPE_SET(m, mflowtype);
4090 packet_length = sctp_calculate_len(m);
4091 ip = mtod(m, struct ip *);
4092 ip->ip_v = IPVERSION;
4093 ip->ip_hl = (sizeof(struct ip) >> 2);
4094 if (tos_value == 0) {
4096 * This means especially, that it is not set
4097 * at the SCTP layer. So use the value from
4100 tos_value = inp->ip_inp.inp.inp_ip_tos;
4104 tos_value |= sctp_get_ect(stcb);
4106 if ((nofragment_flag) && (port == 0)) {
4107 ip->ip_off = htons(IP_DF);
4109 ip->ip_off = htons(0);
4111 /* FreeBSD has a function for ip_id's */
4114 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4115 ip->ip_len = htons(packet_length);
4116 ip->ip_tos = tos_value;
4118 ip->ip_p = IPPROTO_UDP;
4120 ip->ip_p = IPPROTO_SCTP;
4125 memset(&iproute, 0, sizeof(iproute));
4126 memcpy(&ro->ro_dst, to, to->sa_len);
4128 ro = (sctp_route_t *) & net->ro;
4130 /* Now the address selection part */
4131 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4133 /* call the routine to select the src address */
4134 if (net && out_of_asoc_ok == 0) {
4135 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4136 sctp_free_ifa(net->ro._s_addr);
4137 net->ro._s_addr = NULL;
4138 net->src_addr_selected = 0;
4144 if (net->src_addr_selected == 0) {
4145 /* Cache the source address */
4146 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4149 net->src_addr_selected = 1;
4151 if (net->ro._s_addr == NULL) {
4152 /* No route to host */
4153 net->src_addr_selected = 0;
4154 sctp_handle_no_route(stcb, net, so_locked);
4155 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4157 return (EHOSTUNREACH);
4159 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4161 if (over_addr == NULL) {
4162 struct sctp_ifa *_lsrc;
4164 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4168 if (_lsrc == NULL) {
4169 sctp_handle_no_route(stcb, net, so_locked);
4170 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4172 return (EHOSTUNREACH);
4174 ip->ip_src = _lsrc->address.sin.sin_addr;
4175 sctp_free_ifa(_lsrc);
4177 ip->ip_src = over_addr->sin.sin_addr;
4178 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4182 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4183 sctp_handle_no_route(stcb, net, so_locked);
4184 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4186 return (EHOSTUNREACH);
4188 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4189 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4190 udp->uh_dport = port;
4191 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip)));
4193 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4197 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4199 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4202 sctphdr->src_port = src_port;
4203 sctphdr->dest_port = dest_port;
4204 sctphdr->v_tag = v_tag;
4205 sctphdr->checksum = 0;
4208 * If source address selection fails and we find no
4209 * route then the ip_output should fail as well with
4210 * a NO_ROUTE_TO_HOST type error. We probably should
4211 * catch that somewhere and abort the association
4212 * right away (assuming this is an INIT being sent).
4214 if (ro->ro_rt == NULL) {
4216 * src addr selection failed to find a route
4217 * (or valid source addr), so we can't get
4218 * there from here (yet)!
4220 sctp_handle_no_route(stcb, net, so_locked);
4221 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4223 return (EHOSTUNREACH);
4225 if (ro != &iproute) {
4226 memcpy(&iproute, ro, sizeof(*ro));
4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4229 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4230 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4231 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4232 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4235 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4236 /* failed to prepend data, give up */
4237 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4241 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4243 #if defined(SCTP_WITH_NO_CSUM)
4244 SCTP_STAT_INCR(sctps_sendnocrc);
4246 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4247 SCTP_STAT_INCR(sctps_sendswcrc);
4250 SCTP_ENABLE_UDP_CSUM(o_pak);
4253 #if defined(SCTP_WITH_NO_CSUM)
4254 SCTP_STAT_INCR(sctps_sendnocrc);
4256 m->m_pkthdr.csum_flags = CSUM_SCTP;
4257 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4258 SCTP_STAT_INCR(sctps_sendhwcrc);
4261 #ifdef SCTP_PACKET_LOGGING
4262 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4263 sctp_packet_log(o_pak);
4265 /* send it out. table id is taken from stcb */
4266 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4267 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4268 so = SCTP_INP_SO(inp);
4269 SCTP_SOCKET_UNLOCK(so, 0);
4272 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4273 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4274 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4275 atomic_add_int(&stcb->asoc.refcnt, 1);
4276 SCTP_TCB_UNLOCK(stcb);
4277 SCTP_SOCKET_LOCK(so, 0);
4278 SCTP_TCB_LOCK(stcb);
4279 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4282 SCTP_STAT_INCR(sctps_sendpackets);
4283 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4285 SCTP_STAT_INCR(sctps_senderrors);
4287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4289 /* free tempy routes */
4293 * PMTU check versus smallest asoc MTU goes
4296 if ((ro->ro_rt != NULL) &&
4297 (net->ro._s_addr)) {
4300 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4302 mtu -= sizeof(struct udphdr);
4304 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4305 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4308 } else if (ro->ro_rt == NULL) {
4309 /* route was freed */
4310 if (net->ro._s_addr &&
4311 net->src_addr_selected) {
4312 sctp_free_ifa(net->ro._s_addr);
4313 net->ro._s_addr = NULL;
4315 net->src_addr_selected = 0;
4324 uint32_t flowlabel, flowinfo;
4325 struct ip6_hdr *ip6h;
4326 struct route_in6 ip6route;
4328 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4330 struct sockaddr_in6 lsa6_storage;
4332 u_short prev_port = 0;
4336 flowlabel = net->flowlabel;
4338 flowlabel = stcb->asoc.default_flowlabel;
4340 flowlabel = inp->sctp_ep.default_flowlabel;
4342 if (flowlabel == 0) {
4344 * This means especially, that it is not set
4345 * at the SCTP layer. So use the value from
4348 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4350 flowlabel &= 0x000fffff;
4351 len = SCTP_MIN_OVERHEAD;
4353 len += sizeof(struct udphdr);
4355 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4358 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4361 SCTP_ALIGN_TO_END(newm, len);
4362 SCTP_BUF_LEN(newm) = len;
4363 SCTP_BUF_NEXT(newm) = m;
4366 m->m_pkthdr.flowid = net->flowid;
4367 M_HASHTYPE_SET(m, net->flowtype);
4369 m->m_pkthdr.flowid = mflowid;
4370 M_HASHTYPE_SET(m, mflowtype);
4372 packet_length = sctp_calculate_len(m);
4374 ip6h = mtod(m, struct ip6_hdr *);
4375 /* protect *sin6 from overwrite */
4376 sin6 = (struct sockaddr_in6 *)to;
4380 /* KAME hack: embed scopeid */
4381 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4382 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4386 memset(&ip6route, 0, sizeof(ip6route));
4387 ro = (sctp_route_t *) & ip6route;
4388 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4390 ro = (sctp_route_t *) & net->ro;
4393 * We assume here that inp_flow is in host byte
4394 * order within the TCB!
4396 if (tos_value == 0) {
4398 * This means especially, that it is not set
4399 * at the SCTP layer. So use the value from
4402 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4406 tos_value |= sctp_get_ect(stcb);
4410 flowinfo |= tos_value;
4412 flowinfo |= flowlabel;
4413 ip6h->ip6_flow = htonl(flowinfo);
4415 ip6h->ip6_nxt = IPPROTO_UDP;
4417 ip6h->ip6_nxt = IPPROTO_SCTP;
4419 ip6h->ip6_plen = (uint16_t) (packet_length - sizeof(struct ip6_hdr));
4420 ip6h->ip6_dst = sin6->sin6_addr;
4423 * Add SRC address selection here: we can only reuse
4424 * to a limited degree the kame src-addr-sel, since
4425 * we can try their selection but it may not be
4428 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4429 lsa6_tmp.sin6_family = AF_INET6;
4430 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4432 if (net && out_of_asoc_ok == 0) {
4433 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4434 sctp_free_ifa(net->ro._s_addr);
4435 net->ro._s_addr = NULL;
4436 net->src_addr_selected = 0;
4442 if (net->src_addr_selected == 0) {
4443 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4444 /* KAME hack: embed scopeid */
4445 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4446 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4449 /* Cache the source address */
4450 net->ro._s_addr = sctp_source_address_selection(inp,
4456 (void)sa6_recoverscope(sin6);
4457 net->src_addr_selected = 1;
4459 if (net->ro._s_addr == NULL) {
4460 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4461 net->src_addr_selected = 0;
4462 sctp_handle_no_route(stcb, net, so_locked);
4463 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4465 return (EHOSTUNREACH);
4467 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4469 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4470 /* KAME hack: embed scopeid */
4471 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4472 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4475 if (over_addr == NULL) {
4476 struct sctp_ifa *_lsrc;
4478 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4482 if (_lsrc == NULL) {
4483 sctp_handle_no_route(stcb, net, so_locked);
4484 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4486 return (EHOSTUNREACH);
4488 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4489 sctp_free_ifa(_lsrc);
4491 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4492 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4494 (void)sa6_recoverscope(sin6);
4496 lsa6->sin6_port = inp->sctp_lport;
4498 if (ro->ro_rt == NULL) {
4500 * src addr selection failed to find a route
4501 * (or valid source addr), so we can't get
4504 sctp_handle_no_route(stcb, net, so_locked);
4505 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4507 return (EHOSTUNREACH);
4510 * XXX: sa6 may not have a valid sin6_scope_id in
4511 * the non-SCOPEDROUTING case.
4513 bzero(&lsa6_storage, sizeof(lsa6_storage));
4514 lsa6_storage.sin6_family = AF_INET6;
4515 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4516 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4517 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4518 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4523 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4524 lsa6_storage.sin6_port = inp->sctp_lport;
4525 lsa6 = &lsa6_storage;
4526 ip6h->ip6_src = lsa6->sin6_addr;
4529 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4530 sctp_handle_no_route(stcb, net, so_locked);
4531 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4533 return (EHOSTUNREACH);
4535 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4536 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4537 udp->uh_dport = port;
4538 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip6_hdr)));
4540 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4542 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4545 sctphdr->src_port = src_port;
4546 sctphdr->dest_port = dest_port;
4547 sctphdr->v_tag = v_tag;
4548 sctphdr->checksum = 0;
4551 * We set the hop limit now since there is a good
4552 * chance that our ro pointer is now filled
4554 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4555 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4558 /* Copy to be sure something bad is not happening */
4559 sin6->sin6_addr = ip6h->ip6_dst;
4560 lsa6->sin6_addr = ip6h->ip6_src;
4563 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4565 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4566 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4567 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4569 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4571 * preserve the port and scope for link
4574 prev_scope = sin6->sin6_scope_id;
4575 prev_port = sin6->sin6_port;
4577 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4578 /* failed to prepend data, give up */
4580 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4583 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4585 #if defined(SCTP_WITH_NO_CSUM)
4586 SCTP_STAT_INCR(sctps_sendnocrc);
4588 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4589 SCTP_STAT_INCR(sctps_sendswcrc);
4591 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4592 udp->uh_sum = 0xffff;
4595 #if defined(SCTP_WITH_NO_CSUM)
4596 SCTP_STAT_INCR(sctps_sendnocrc);
4598 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4599 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4600 SCTP_STAT_INCR(sctps_sendhwcrc);
4603 /* send it out. table id is taken from stcb */
4604 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4605 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4606 so = SCTP_INP_SO(inp);
4607 SCTP_SOCKET_UNLOCK(so, 0);
4610 #ifdef SCTP_PACKET_LOGGING
4611 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4612 sctp_packet_log(o_pak);
4614 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4615 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4616 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4617 atomic_add_int(&stcb->asoc.refcnt, 1);
4618 SCTP_TCB_UNLOCK(stcb);
4619 SCTP_SOCKET_LOCK(so, 0);
4620 SCTP_TCB_LOCK(stcb);
4621 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4625 /* for link local this must be done */
4626 sin6->sin6_scope_id = prev_scope;
4627 sin6->sin6_port = prev_port;
4629 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4630 SCTP_STAT_INCR(sctps_sendpackets);
4631 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4633 SCTP_STAT_INCR(sctps_senderrors);
4636 /* Now if we had a temp route free it */
4640 * PMTU check versus smallest asoc MTU goes
4643 if (ro->ro_rt == NULL) {
4644 /* Route was freed */
4645 if (net->ro._s_addr &&
4646 net->src_addr_selected) {
4647 sctp_free_ifa(net->ro._s_addr);
4648 net->ro._s_addr = NULL;
4650 net->src_addr_selected = 0;
4652 if ((ro->ro_rt != NULL) &&
4653 (net->ro._s_addr)) {
4656 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4658 (stcb->asoc.smallest_mtu > mtu)) {
4659 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4662 net->mtu -= sizeof(struct udphdr);
4666 if (ND_IFINFO(ifp)->linkmtu &&
4667 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4668 sctp_mtu_size_reset(inp,
4670 ND_IFINFO(ifp)->linkmtu);
4678 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4679 ((struct sockaddr *)to)->sa_family);
4681 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4688 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4689 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4694 struct mbuf *m, *m_last;
4695 struct sctp_nets *net;
4696 struct sctp_init_chunk *init;
4697 struct sctp_supported_addr_param *sup_addr;
4698 struct sctp_adaptation_layer_indication *ali;
4699 struct sctp_supported_chunk_types_param *pr_supported;
4700 struct sctp_paramhdr *ph;
4701 int cnt_inits_to = 0;
4703 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4705 /* INIT's always go to the primary (and usually ONLY address) */
4706 net = stcb->asoc.primary_destination;
4708 net = TAILQ_FIRST(&stcb->asoc.nets);
4713 /* we confirm any address we send an INIT to */
4714 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4715 (void)sctp_set_primary_addr(stcb, NULL, net);
4717 /* we confirm any address we send an INIT to */
4718 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4720 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4722 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4724 * special hook, if we are sending to link local it will not
4725 * show up in our private address count.
4727 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4731 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4732 /* This case should not happen */
4733 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4736 /* start the INIT timer */
4737 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4739 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4741 /* No memory, INIT timer will re-attempt. */
4742 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4745 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4747 /* Now lets put the chunk header in place */
4748 init = mtod(m, struct sctp_init_chunk *);
4749 /* now the chunk header */
4750 init->ch.chunk_type = SCTP_INITIATION;
4751 init->ch.chunk_flags = 0;
4752 /* fill in later from mbuf we build */
4753 init->ch.chunk_length = 0;
4754 /* place in my tag */
4755 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4756 /* set up some of the credits. */
4757 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4758 SCTP_MINIMAL_RWND));
4759 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4760 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4761 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4763 /* Adaptation layer indication parameter */
4764 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4765 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4766 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4767 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4768 ali->ph.param_length = htons(parameter_len);
4769 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4770 chunk_len += parameter_len;
4773 if (stcb->asoc.ecn_supported == 1) {
4774 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4775 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4776 ph->param_type = htons(SCTP_ECN_CAPABLE);
4777 ph->param_length = htons(parameter_len);
4778 chunk_len += parameter_len;
4780 /* PR-SCTP supported parameter */
4781 if (stcb->asoc.prsctp_supported == 1) {
4782 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4783 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4784 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4785 ph->param_length = htons(parameter_len);
4786 chunk_len += parameter_len;
4788 /* Add NAT friendly parameter. */
4789 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4790 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4791 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4792 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4793 ph->param_length = htons(parameter_len);
4794 chunk_len += parameter_len;
4796 /* And now tell the peer which extensions we support */
4798 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4799 if (stcb->asoc.prsctp_supported == 1) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4801 if (stcb->asoc.idata_supported) {
4802 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4805 if (stcb->asoc.auth_supported == 1) {
4806 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4808 if (stcb->asoc.asconf_supported == 1) {
4809 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4810 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4812 if (stcb->asoc.reconfig_supported == 1) {
4813 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4815 if (stcb->asoc.idata_supported) {
4816 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4818 if (stcb->asoc.nrsack_supported == 1) {
4819 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4821 if (stcb->asoc.pktdrop_supported == 1) {
4822 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4825 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4826 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4827 pr_supported->ph.param_length = htons(parameter_len);
4828 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4829 chunk_len += parameter_len;
4831 /* add authentication parameters */
4832 if (stcb->asoc.auth_supported) {
4833 /* attach RANDOM parameter, if available */
4834 if (stcb->asoc.authinfo.random != NULL) {
4835 struct sctp_auth_random *randp;
4837 if (padding_len > 0) {
4838 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4839 chunk_len += padding_len;
4842 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4843 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4844 /* random key already contains the header */
4845 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4846 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4847 chunk_len += parameter_len;
4849 /* add HMAC_ALGO parameter */
4850 if (stcb->asoc.local_hmacs != NULL) {
4851 struct sctp_auth_hmac_algo *hmacs;
4853 if (padding_len > 0) {
4854 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4855 chunk_len += padding_len;
4858 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4859 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4860 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4861 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4862 hmacs->ph.param_length = htons(parameter_len);
4863 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4864 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4865 chunk_len += parameter_len;
4867 /* add CHUNKS parameter */
4868 if (stcb->asoc.local_auth_chunks != NULL) {
4869 struct sctp_auth_chunk_list *chunks;
4871 if (padding_len > 0) {
4872 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4873 chunk_len += padding_len;
4876 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4877 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4878 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4879 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4880 chunks->ph.param_length = htons(parameter_len);
4881 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4882 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4883 chunk_len += parameter_len;
4886 /* now any cookie time extensions */
4887 if (stcb->asoc.cookie_preserve_req) {
4888 struct sctp_cookie_perserve_param *cookie_preserve;
4890 if (padding_len > 0) {
4891 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4892 chunk_len += padding_len;
4895 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4896 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4897 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4898 cookie_preserve->ph.param_length = htons(parameter_len);
4899 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4900 stcb->asoc.cookie_preserve_req = 0;
4901 chunk_len += parameter_len;
4903 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4906 if (padding_len > 0) {
4907 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4908 chunk_len += padding_len;
4911 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4912 if (stcb->asoc.scope.ipv4_addr_legal) {
4913 parameter_len += (uint16_t) sizeof(uint16_t);
4915 if (stcb->asoc.scope.ipv6_addr_legal) {
4916 parameter_len += (uint16_t) sizeof(uint16_t);
4918 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4919 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4920 sup_addr->ph.param_length = htons(parameter_len);
4922 if (stcb->asoc.scope.ipv4_addr_legal) {
4923 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4925 if (stcb->asoc.scope.ipv6_addr_legal) {
4926 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4928 padding_len = 4 - 2 * i;
4929 chunk_len += parameter_len;
4931 SCTP_BUF_LEN(m) = chunk_len;
4932 /* now the addresses */
4934 * To optimize this we could put the scoping stuff into a structure
4935 * and remove the individual uint8's from the assoc structure. Then
4936 * we could just sifa in the address within the stcb. But for now
4937 * this is a quick hack to get the address stuff teased apart.
4939 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4941 &padding_len, &chunk_len);
4943 init->ch.chunk_length = htons(chunk_len);
4944 if (padding_len > 0) {
4945 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4950 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4951 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4952 (struct sockaddr *)&net->ro._l_addr,
4953 m, 0, NULL, 0, 0, 0, 0,
4954 inp->sctp_lport, stcb->rport, htonl(0),
4958 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4959 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4960 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4964 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4965 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4968 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4969 * being equal to the beginning of the params i.e. (iphlen +
4970 * sizeof(struct sctp_init_msg) parse through the parameters to the
4971 * end of the mbuf verifying that all parameters are known.
4973 * For unknown parameters build and return a mbuf with
4974 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4975 * processing this chunk stop, and set *abort_processing to 1.
4977 * By having param_offset be pre-set to where parameters begin it is
4978 * hoped that this routine may be reused in the future by new
4981 struct sctp_paramhdr *phdr, params;
4983 struct mbuf *mat, *op_err;
4984 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4985 int at, limit, pad_needed;
4986 uint16_t ptype, plen, padded_size;
4989 *abort_processing = 0;
4992 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4995 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4996 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4997 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4998 ptype = ntohs(phdr->param_type);
4999 plen = ntohs(phdr->param_length);
5000 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5001 /* wacked parameter */
5002 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5005 limit -= SCTP_SIZE32(plen);
5007 * All parameters for all chunks that we know/understand are
5008 * listed here. We process them other places and make
5009 * appropriate stop actions per the upper bits. However this
5010 * is the generic routine processor's can call to get back
5011 * an operr.. to either incorporate (init-ack) or send.
5013 padded_size = SCTP_SIZE32(plen);
5015 /* Param's with variable size */
5016 case SCTP_HEARTBEAT_INFO:
5017 case SCTP_STATE_COOKIE:
5018 case SCTP_UNRECOG_PARAM:
5019 case SCTP_ERROR_CAUSE_IND:
5023 /* Param's with variable size within a range */
5024 case SCTP_CHUNK_LIST:
5025 case SCTP_SUPPORTED_CHUNK_EXT:
5026 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5027 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5032 case SCTP_SUPPORTED_ADDRTYPE:
5033 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5034 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5040 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5041 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5046 case SCTP_SET_PRIM_ADDR:
5047 case SCTP_DEL_IP_ADDRESS:
5048 case SCTP_ADD_IP_ADDRESS:
5049 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5050 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5056 /* Param's with a fixed size */
5057 case SCTP_IPV4_ADDRESS:
5058 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5064 case SCTP_IPV6_ADDRESS:
5065 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5066 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5071 case SCTP_COOKIE_PRESERVE:
5072 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5073 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5078 case SCTP_HAS_NAT_SUPPORT:
5081 case SCTP_PRSCTP_SUPPORTED:
5082 if (padded_size != sizeof(struct sctp_paramhdr)) {
5083 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5088 case SCTP_ECN_CAPABLE:
5089 if (padded_size != sizeof(struct sctp_paramhdr)) {
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5095 case SCTP_ULP_ADAPTATION:
5096 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5097 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5102 case SCTP_SUCCESS_REPORT:
5103 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5104 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5109 case SCTP_HOSTNAME_ADDRESS:
5111 /* We can NOT handle HOST NAME addresses!! */
5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5115 *abort_processing = 1;
5116 if (op_err == NULL) {
5117 /* Ok need to try to get a mbuf */
5119 l_len = SCTP_MIN_OVERHEAD;
5121 l_len = SCTP_MIN_V4_OVERHEAD;
5123 l_len += sizeof(struct sctp_chunkhdr);
5125 l_len += sizeof(struct sctp_paramhdr);
5126 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5128 SCTP_BUF_LEN(op_err) = 0;
5130 * pre-reserve space for ip
5131 * and sctp header and
5135 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5137 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5139 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5140 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5144 /* If we have space */
5145 struct sctp_paramhdr s;
5148 uint32_t cpthis = 0;
5150 pad_needed = 4 - (err_at % 4);
5151 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5152 err_at += pad_needed;
5154 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5155 s.param_length = htons(sizeof(s) + plen);
5156 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5157 err_at += sizeof(s);
5158 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5160 sctp_m_freem(op_err);
5162 * we are out of memory but
5163 * we still need to have a
5164 * look at what to do (the
5165 * system is in trouble
5170 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5177 * we do not recognize the parameter figure out what
5180 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5181 if ((ptype & 0x4000) == 0x4000) {
5182 /* Report bit is set?? */
5183 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5184 if (op_err == NULL) {
5187 /* Ok need to try to get an mbuf */
5189 l_len = SCTP_MIN_OVERHEAD;
5191 l_len = SCTP_MIN_V4_OVERHEAD;
5193 l_len += sizeof(struct sctp_chunkhdr);
5195 l_len += sizeof(struct sctp_paramhdr);
5196 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5198 SCTP_BUF_LEN(op_err) = 0;
5200 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5202 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5204 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5205 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5209 /* If we have space */
5210 struct sctp_paramhdr s;
5213 uint32_t cpthis = 0;
5215 pad_needed = 4 - (err_at % 4);
5216 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5217 err_at += pad_needed;
5219 s.param_type = htons(SCTP_UNRECOG_PARAM);
5220 s.param_length = htons(sizeof(s) + plen);
5221 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5222 err_at += sizeof(s);
5223 if (plen > sizeof(tempbuf)) {
5224 plen = sizeof(tempbuf);
5226 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5228 sctp_m_freem(op_err);
5230 * we are out of memory but
5231 * we still need to have a
5232 * look at what to do (the
5233 * system is in trouble
5237 goto more_processing;
5239 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5244 if ((ptype & 0x8000) == 0x0000) {
5245 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5248 /* skip this chunk and continue processing */
5249 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5250 at += SCTP_SIZE32(plen);
5255 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5259 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5260 *abort_processing = 1;
5261 if ((op_err == NULL) && phdr) {
5265 l_len = SCTP_MIN_OVERHEAD;
5267 l_len = SCTP_MIN_V4_OVERHEAD;
5269 l_len += sizeof(struct sctp_chunkhdr);
5270 l_len += (2 * sizeof(struct sctp_paramhdr));
5271 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5273 SCTP_BUF_LEN(op_err) = 0;
5275 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5277 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5279 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5280 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5283 if ((op_err) && phdr) {
5284 struct sctp_paramhdr s;
5287 uint32_t cpthis = 0;
5289 pad_needed = 4 - (err_at % 4);
5290 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5291 err_at += pad_needed;
5293 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5294 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5295 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5296 err_at += sizeof(s);
5297 /* Only copy back the p-hdr that caused the issue */
5298 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5304 sctp_are_there_new_addresses(struct sctp_association *asoc,
5305 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5308 * Given a INIT packet, look through the packet to verify that there
5309 * are NO new addresses. As we go through the parameters add reports
5310 * of any un-understood parameters that require an error. Also we
5311 * must return (1) to drop the packet if we see a un-understood
5312 * parameter that tells us to drop the chunk.
5314 struct sockaddr *sa_touse;
5315 struct sockaddr *sa;
5316 struct sctp_paramhdr *phdr, params;
5317 uint16_t ptype, plen;
5319 struct sctp_nets *net;
5323 struct sockaddr_in sin4, *sa4;
5327 struct sockaddr_in6 sin6, *sa6;
5332 memset(&sin4, 0, sizeof(sin4));
5333 sin4.sin_family = AF_INET;
5334 sin4.sin_len = sizeof(sin4);
5337 memset(&sin6, 0, sizeof(sin6));
5338 sin6.sin6_family = AF_INET6;
5339 sin6.sin6_len = sizeof(sin6);
5341 /* First what about the src address of the pkt ? */
5343 switch (src->sa_family) {
5346 if (asoc->scope.ipv4_addr_legal) {
5353 if (asoc->scope.ipv6_addr_legal) {
5364 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5365 sa = (struct sockaddr *)&net->ro._l_addr;
5366 if (sa->sa_family == src->sa_family) {
5368 if (sa->sa_family == AF_INET) {
5369 struct sockaddr_in *src4;
5371 sa4 = (struct sockaddr_in *)sa;
5372 src4 = (struct sockaddr_in *)src;
5373 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5380 if (sa->sa_family == AF_INET6) {
5381 struct sockaddr_in6 *src6;
5383 sa6 = (struct sockaddr_in6 *)sa;
5384 src6 = (struct sockaddr_in6 *)src;
5385 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5394 /* New address added! no need to look further. */
5398 /* Ok so far lets munge through the rest of the packet */
5399 offset += sizeof(struct sctp_init_chunk);
5400 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5403 ptype = ntohs(phdr->param_type);
5404 plen = ntohs(phdr->param_length);
5407 case SCTP_IPV4_ADDRESS:
5409 struct sctp_ipv4addr_param *p4, p4_buf;
5411 phdr = sctp_get_next_param(in_initpkt, offset,
5412 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5413 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5417 if (asoc->scope.ipv4_addr_legal) {
5418 p4 = (struct sctp_ipv4addr_param *)phdr;
5419 sin4.sin_addr.s_addr = p4->addr;
5420 sa_touse = (struct sockaddr *)&sin4;
5426 case SCTP_IPV6_ADDRESS:
5428 struct sctp_ipv6addr_param *p6, p6_buf;
5430 phdr = sctp_get_next_param(in_initpkt, offset,
5431 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5432 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5436 if (asoc->scope.ipv6_addr_legal) {
5437 p6 = (struct sctp_ipv6addr_param *)phdr;
5438 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5440 sa_touse = (struct sockaddr *)&sin6;
5450 /* ok, sa_touse points to one to check */
5452 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5453 sa = (struct sockaddr *)&net->ro._l_addr;
5454 if (sa->sa_family != sa_touse->sa_family) {
5458 if (sa->sa_family == AF_INET) {
5459 sa4 = (struct sockaddr_in *)sa;
5460 if (sa4->sin_addr.s_addr ==
5461 sin4.sin_addr.s_addr) {
5468 if (sa->sa_family == AF_INET6) {
5469 sa6 = (struct sockaddr_in6 *)sa;
5470 if (SCTP6_ARE_ADDR_EQUAL(
5479 /* New addr added! no need to look further */
5483 offset += SCTP_SIZE32(plen);
5484 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5490 * Given a MBUF chain that was sent into us containing an INIT. Build a
5491 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5492 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5493 * message (i.e. the struct sctp_init_msg).
5496 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5497 struct sctp_nets *src_net, struct mbuf *init_pkt,
5498 int iphlen, int offset,
5499 struct sockaddr *src, struct sockaddr *dst,
5500 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5501 uint8_t mflowtype, uint32_t mflowid,
5502 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5504 struct sctp_association *asoc;
5505 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5506 struct sctp_init_ack_chunk *initack;
5507 struct sctp_adaptation_layer_indication *ali;
5508 struct sctp_supported_chunk_types_param *pr_supported;
5509 struct sctp_paramhdr *ph;
5510 union sctp_sockstore *over_addr;
5511 struct sctp_scoping scp;
5514 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5515 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5516 struct sockaddr_in *sin;
5520 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5521 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5522 struct sockaddr_in6 *sin6;
5525 struct sockaddr *to;
5526 struct sctp_state_cookie stc;
5527 struct sctp_nets *net = NULL;
5528 uint8_t *signature = NULL;
5529 int cnt_inits_to = 0;
5530 uint16_t his_limit, i_want;
5532 int nat_friendly = 0;
5534 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5541 if ((asoc != NULL) &&
5542 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5543 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5545 * new addresses, out of here in non-cookie-wait
5548 * Send an ABORT, without the new address error cause.
5549 * This looks no different than if no listener was
5552 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5554 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5555 mflowtype, mflowid, inp->fibnum,
5559 if (src_net != NULL && (src_net->port != port)) {
5561 * change of remote encapsulation port, out of here
5562 * in non-cookie-wait states
5564 * Send an ABORT, without an specific error cause. This
5565 * looks no different than if no listener was
5568 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5569 "Remote encapsulation port changed");
5570 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5571 mflowtype, mflowid, inp->fibnum,
5577 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5578 (offset + sizeof(struct sctp_init_chunk)),
5579 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5582 if (op_err == NULL) {
5583 char msg[SCTP_DIAG_INFO_LEN];
5585 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5586 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5589 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5590 init_chk->init.initiate_tag, op_err,
5591 mflowtype, mflowid, inp->fibnum,
5595 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5597 /* No memory, INIT timer will re-attempt. */
5599 sctp_m_freem(op_err);
5602 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5606 * We might not overwrite the identification[] completely and on
5607 * some platforms time_entered will contain some padding. Therefore
5608 * zero out the cookie to avoid putting uninitialized memory on the
5611 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5613 /* the time I built cookie */
5614 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5616 /* populate any tie tags */
5618 /* unlock before tag selections */
5619 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5620 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5621 stc.cookie_life = asoc->cookie_life;
5622 net = asoc->primary_destination;
5624 stc.tie_tag_my_vtag = 0;
5625 stc.tie_tag_peer_vtag = 0;
5626 /* life I will award this cookie */
5627 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5630 /* copy in the ports for later check */
5631 stc.myport = sh->dest_port;
5632 stc.peerport = sh->src_port;
5635 * If we wanted to honor cookie life extensions, we would add to
5636 * stc.cookie_life. For now we should NOT honor any extension
5638 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5639 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5640 stc.ipv6_addr_legal = 1;
5641 if (SCTP_IPV6_V6ONLY(inp)) {
5642 stc.ipv4_addr_legal = 0;
5644 stc.ipv4_addr_legal = 1;
5647 stc.ipv6_addr_legal = 0;
5648 stc.ipv4_addr_legal = 1;
5653 switch (dst->sa_family) {
5657 /* lookup address */
5658 stc.address[0] = src4->sin_addr.s_addr;
5662 stc.addr_type = SCTP_IPV4_ADDRESS;
5663 /* local from address */
5664 stc.laddress[0] = dst4->sin_addr.s_addr;
5665 stc.laddress[1] = 0;
5666 stc.laddress[2] = 0;
5667 stc.laddress[3] = 0;
5668 stc.laddr_type = SCTP_IPV4_ADDRESS;
5669 /* scope_id is only for v6 */
5671 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5672 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5675 /* Must use the address in this case */
5676 if (sctp_is_address_on_local_host(src, vrf_id)) {
5677 stc.loopback_scope = 1;
5680 stc.local_scope = 0;
5688 stc.addr_type = SCTP_IPV6_ADDRESS;
5689 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5690 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5691 if (sctp_is_address_on_local_host(src, vrf_id)) {
5692 stc.loopback_scope = 1;
5693 stc.local_scope = 0;
5696 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5697 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5699 * If the new destination or source
5700 * is a LINK_LOCAL we must have
5701 * common both site and local scope.
5702 * Don't set local scope though
5703 * since we must depend on the
5704 * source to be added implicitly. We
5705 * cannot assure just because we
5706 * share one link that all links are
5709 stc.local_scope = 0;
5713 * we start counting for the private
5714 * address stuff at 1. since the
5715 * link local we source from won't
5716 * show up in our scoped count.
5720 * pull out the scope_id from
5723 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5724 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5726 * If the new destination or source
5727 * is SITE_LOCAL then we must have
5728 * site scope in common.
5732 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5733 stc.laddr_type = SCTP_IPV6_ADDRESS;
5743 /* set the scope per the existing tcb */
5746 struct sctp_nets *lnet;
5750 stc.loopback_scope = asoc->scope.loopback_scope;
5751 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5752 stc.site_scope = asoc->scope.site_scope;
5753 stc.local_scope = asoc->scope.local_scope;
5755 /* Why do we not consider IPv4 LL addresses? */
5756 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5757 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5758 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5760 * if we have a LL address, start
5768 /* use the net pointer */
5769 to = (struct sockaddr *)&net->ro._l_addr;
5770 switch (to->sa_family) {
5773 sin = (struct sockaddr_in *)to;
5774 stc.address[0] = sin->sin_addr.s_addr;
5778 stc.addr_type = SCTP_IPV4_ADDRESS;
5779 if (net->src_addr_selected == 0) {
5781 * strange case here, the INIT should have
5782 * did the selection.
5784 net->ro._s_addr = sctp_source_address_selection(inp,
5785 stcb, (sctp_route_t *) & net->ro,
5787 if (net->ro._s_addr == NULL)
5790 net->src_addr_selected = 1;
5793 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5794 stc.laddress[1] = 0;
5795 stc.laddress[2] = 0;
5796 stc.laddress[3] = 0;
5797 stc.laddr_type = SCTP_IPV4_ADDRESS;
5798 /* scope_id is only for v6 */
5804 sin6 = (struct sockaddr_in6 *)to;
5805 memcpy(&stc.address, &sin6->sin6_addr,
5806 sizeof(struct in6_addr));
5807 stc.addr_type = SCTP_IPV6_ADDRESS;
5808 stc.scope_id = sin6->sin6_scope_id;
5809 if (net->src_addr_selected == 0) {
5811 * strange case here, the INIT should have
5812 * done the selection.
5814 net->ro._s_addr = sctp_source_address_selection(inp,
5815 stcb, (sctp_route_t *) & net->ro,
5817 if (net->ro._s_addr == NULL)
5820 net->src_addr_selected = 1;
5822 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5823 sizeof(struct in6_addr));
5824 stc.laddr_type = SCTP_IPV6_ADDRESS;
5829 /* Now lets put the SCTP header in place */
5830 initack = mtod(m, struct sctp_init_ack_chunk *);
5831 /* Save it off for quick ref */
5832 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5834 memcpy(stc.identification, SCTP_VERSION_STRING,
5835 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5836 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5837 /* now the chunk header */
5838 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5839 initack->ch.chunk_flags = 0;
5840 /* fill in later from mbuf we build */
5841 initack->ch.chunk_length = 0;
5842 /* place in my tag */
5843 if ((asoc != NULL) &&
5844 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5845 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5846 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5847 /* re-use the v-tags and init-seq here */
5848 initack->init.initiate_tag = htonl(asoc->my_vtag);
5849 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5851 uint32_t vtag, itsn;
5853 if (hold_inp_lock) {
5854 SCTP_INP_INCR_REF(inp);
5855 SCTP_INP_RUNLOCK(inp);
5858 atomic_add_int(&asoc->refcnt, 1);
5859 SCTP_TCB_UNLOCK(stcb);
5861 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5862 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5864 * Got a duplicate vtag on some guy behind a
5865 * nat make sure we don't use it.
5869 initack->init.initiate_tag = htonl(vtag);
5870 /* get a TSN to use too */
5871 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5872 initack->init.initial_tsn = htonl(itsn);
5873 SCTP_TCB_LOCK(stcb);
5874 atomic_add_int(&asoc->refcnt, -1);
5876 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5877 initack->init.initiate_tag = htonl(vtag);
5878 /* get a TSN to use too */
5879 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5881 if (hold_inp_lock) {
5882 SCTP_INP_RLOCK(inp);
5883 SCTP_INP_DECR_REF(inp);
5886 /* save away my tag to */
5887 stc.my_vtag = initack->init.initiate_tag;
5889 /* set up some of the credits. */
5890 so = inp->sctp_socket;
5892 /* memory problem */
5896 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5898 /* set what I want */
5899 his_limit = ntohs(init_chk->init.num_inbound_streams);
5900 /* choose what I want */
5902 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5903 i_want = asoc->streamoutcnt;
5905 i_want = asoc->pre_open_streams;
5908 i_want = inp->sctp_ep.pre_open_stream_count;
5910 if (his_limit < i_want) {
5911 /* I Want more :< */
5912 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5914 /* I can have what I want :> */
5915 initack->init.num_outbound_streams = htons(i_want);
5917 /* tell him his limit. */
5918 initack->init.num_inbound_streams =
5919 htons(inp->sctp_ep.max_open_streams_intome);
5921 /* adaptation layer indication parameter */
5922 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5923 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5924 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5925 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5926 ali->ph.param_length = htons(parameter_len);
5927 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5928 chunk_len += parameter_len;
5931 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5932 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5933 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5934 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5935 ph->param_type = htons(SCTP_ECN_CAPABLE);
5936 ph->param_length = htons(parameter_len);
5937 chunk_len += parameter_len;
5939 /* PR-SCTP supported parameter */
5940 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5941 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5942 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5943 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5944 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5945 ph->param_length = htons(parameter_len);
5946 chunk_len += parameter_len;
5948 /* Add NAT friendly parameter */
5950 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5951 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5952 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5953 ph->param_length = htons(parameter_len);
5954 chunk_len += parameter_len;
5956 /* And now tell the peer which extensions we support */
5958 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5959 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5960 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5962 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5963 ((asoc == NULL) && (inp->idata_supported == 1))) {
5964 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5967 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5968 ((asoc == NULL) && (inp->auth_supported == 1))) {
5969 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5971 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5972 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5973 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5974 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5976 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5977 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5978 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5980 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5981 ((asoc == NULL) && (inp->idata_supported == 1))) {
5982 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5984 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5985 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5986 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5988 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5989 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5990 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5993 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5994 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5995 pr_supported->ph.param_length = htons(parameter_len);
5996 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5997 chunk_len += parameter_len;
5999 /* add authentication parameters */
6000 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
6001 ((asoc == NULL) && (inp->auth_supported == 1))) {
6002 struct sctp_auth_random *randp;
6003 struct sctp_auth_hmac_algo *hmacs;
6004 struct sctp_auth_chunk_list *chunks;
6006 if (padding_len > 0) {
6007 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6008 chunk_len += padding_len;
6011 /* generate and add RANDOM parameter */
6012 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6013 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
6014 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6015 randp->ph.param_type = htons(SCTP_RANDOM);
6016 randp->ph.param_length = htons(parameter_len);
6017 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6018 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6019 chunk_len += parameter_len;
6021 if (padding_len > 0) {
6022 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6023 chunk_len += padding_len;
6026 /* add HMAC_ALGO parameter */
6027 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6028 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
6029 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6030 (uint8_t *) hmacs->hmac_ids);
6031 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6032 hmacs->ph.param_length = htons(parameter_len);
6033 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6034 chunk_len += parameter_len;
6036 if (padding_len > 0) {
6037 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6038 chunk_len += padding_len;
6041 /* add CHUNKS parameter */
6042 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6043 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6044 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6045 chunks->chunk_types);
6046 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6047 chunks->ph.param_length = htons(parameter_len);
6048 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6049 chunk_len += parameter_len;
6051 SCTP_BUF_LEN(m) = chunk_len;
6053 /* now the addresses */
6055 * To optimize this we could put the scoping stuff into a structure
6056 * and remove the individual uint8's from the stc structure. Then we
6057 * could just sifa in the address within the stc.. but for now this
6058 * is a quick hack to get the address stuff teased apart.
6060 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6061 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6062 scp.loopback_scope = stc.loopback_scope;
6063 scp.ipv4_local_scope = stc.ipv4_scope;
6064 scp.local_scope = stc.local_scope;
6065 scp.site_scope = stc.site_scope;
6066 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6068 &padding_len, &chunk_len);
6069 /* padding_len can only be positive, if no addresses have been added */
6070 if (padding_len > 0) {
6071 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6072 chunk_len += padding_len;
6073 SCTP_BUF_LEN(m) += padding_len;
6076 /* tack on the operational error if present */
6079 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6080 parameter_len += SCTP_BUF_LEN(m_tmp);
6082 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6083 SCTP_BUF_NEXT(m_last) = op_err;
6084 while (SCTP_BUF_NEXT(m_last) != NULL) {
6085 m_last = SCTP_BUF_NEXT(m_last);
6087 chunk_len += parameter_len;
6089 if (padding_len > 0) {
6090 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6091 if (m_last == NULL) {
6092 /* Houston we have a problem, no space */
6096 chunk_len += padding_len;
6099 /* Now we must build a cookie */
6100 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6101 if (m_cookie == NULL) {
6102 /* memory problem */
6106 /* Now append the cookie to the end and update the space/size */
6107 SCTP_BUF_NEXT(m_last) = m_cookie;
6109 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6110 parameter_len += SCTP_BUF_LEN(m_tmp);
6111 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6115 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6116 chunk_len += parameter_len;
6119 * Place in the size, but we don't include the last pad (if any) in
6122 initack->ch.chunk_length = htons(chunk_len);
6125 * Time to sign the cookie, we don't sign over the cookie signature
6126 * though thus we set trailer.
6128 (void)sctp_hmac_m(SCTP_HMAC,
6129 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6130 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6131 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6133 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6134 * here since the timer will drive a retranmission.
6136 if (padding_len > 0) {
6137 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6142 if (stc.loopback_scope) {
6143 over_addr = (union sctp_sockstore *)dst;
6148 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6150 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6153 SCTP_SO_NOT_LOCKED);
6154 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6159 sctp_prune_prsctp(struct sctp_tcb *stcb,
6160 struct sctp_association *asoc,
6161 struct sctp_sndrcvinfo *srcv,
6165 struct sctp_tmit_chunk *chk, *nchk;
6167 SCTP_TCB_LOCK_ASSERT(stcb);
6168 if ((asoc->prsctp_supported) &&
6169 (asoc->sent_queue_cnt_removeable > 0)) {
6170 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6172 * Look for chunks marked with the PR_SCTP flag AND
6173 * the buffer space flag. If the one being sent is
6174 * equal or greater priority then purge the old one
6175 * and free some space.
6177 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6179 * This one is PR-SCTP AND buffer space
6182 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6184 * Lower numbers equates to higher
6185 * priority so if the one we are
6186 * looking at has a larger or equal
6187 * priority we want to drop the data
6188 * and NOT retransmit it.
6192 * We release the book_size
6193 * if the mbuf is here
6198 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6202 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6205 freed_spc += ret_spc;
6206 if (freed_spc >= dataout) {
6209 } /* if chunk was present */
6210 } /* if of sufficient priority */
6211 } /* if chunk has enabled */
6212 } /* tailqforeach */
6214 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6215 /* Here we must move to the sent queue and mark */
6216 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6217 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6220 * We release the book_size
6221 * if the mbuf is here
6225 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6228 freed_spc += ret_spc;
6229 if (freed_spc >= dataout) {
6232 } /* end if chk->data */
6233 } /* end if right class */
6234 } /* end if chk pr-sctp */
6235 } /* tailqforeachsafe (chk) */
6236 } /* if enabled in asoc */
6240 sctp_get_frag_point(struct sctp_tcb *stcb,
6241 struct sctp_association *asoc)
6246 * For endpoints that have both v6 and v4 addresses we must reserve
6247 * room for the ipv6 header, for those that are only dealing with V4
6248 * we use a larger frag point.
6250 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6251 ovh = SCTP_MIN_OVERHEAD;
6253 ovh = SCTP_MIN_V4_OVERHEAD;
6255 if (stcb->asoc.idata_supported) {
6256 ovh += sizeof(struct sctp_idata_chunk);
6258 ovh += sizeof(struct sctp_data_chunk);
6260 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6261 siz = asoc->smallest_mtu - ovh;
6263 siz = (stcb->asoc.sctp_frag_point - ovh);
6265 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6267 /* A data chunk MUST fit in a cluster */
6268 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6271 /* adjust for an AUTH chunk if DATA requires auth */
6272 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6273 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6276 /* make it an even word boundary please */
6283 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6286 * We assume that the user wants PR_SCTP_TTL if the user provides a
6287 * positive lifetime but does not specify any PR_SCTP policy.
6289 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6290 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6291 } else if (sp->timetolive > 0) {
6292 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6293 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6297 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6298 case CHUNK_FLAGS_PR_SCTP_BUF:
6300 * Time to live is a priority stored in tv_sec when doing
6301 * the buffer drop thing.
6303 sp->ts.tv_sec = sp->timetolive;
6306 case CHUNK_FLAGS_PR_SCTP_TTL:
6310 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6311 tv.tv_sec = sp->timetolive / 1000;
6312 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6314 * TODO sctp_constants.h needs alternative time
6315 * macros when _KERNEL is undefined.
6317 timevaladd(&sp->ts, &tv);
6320 case CHUNK_FLAGS_PR_SCTP_RTX:
6322 * Time to live is a the number or retransmissions stored in
6325 sp->ts.tv_sec = sp->timetolive;
6329 SCTPDBG(SCTP_DEBUG_USRREQ1,
6330 "Unknown PR_SCTP policy %u.\n",
6331 PR_SCTP_POLICY(sp->sinfo_flags));
6337 sctp_msg_append(struct sctp_tcb *stcb,
6338 struct sctp_nets *net,
6340 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6344 struct sctp_stream_queue_pending *sp = NULL;
6345 struct sctp_stream_out *strm;
6348 * Given an mbuf chain, put it into the association send queue and
6349 * place it on the wheel
6351 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6352 /* Invalid stream number */
6353 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6357 if ((stcb->asoc.stream_locked) &&
6358 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6359 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6363 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6364 /* Now can we send this? */
6365 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6366 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6367 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6368 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6369 /* got data while shutting down */
6370 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6374 sctp_alloc_a_strmoq(stcb, sp);
6376 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6380 sp->sinfo_flags = srcv->sinfo_flags;
6381 sp->timetolive = srcv->sinfo_timetolive;
6382 sp->ppid = srcv->sinfo_ppid;
6383 sp->context = srcv->sinfo_context;
6385 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6387 atomic_add_int(&sp->net->ref_count, 1);
6391 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6392 sp->stream = srcv->sinfo_stream;
6393 sp->msg_is_complete = 1;
6394 sp->sender_all_done = 1;
6397 sp->tail_mbuf = NULL;
6398 sctp_set_prsctp_policy(sp);
6400 * We could in theory (for sendall) sifa the length in, but we would
6401 * still have to hunt through the chain since we need to setup the
6405 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6406 if (SCTP_BUF_NEXT(at) == NULL)
6408 sp->length += SCTP_BUF_LEN(at);
6410 if (srcv->sinfo_keynumber_valid) {
6411 sp->auth_keyid = srcv->sinfo_keynumber;
6413 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6415 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6416 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6417 sp->holds_key_ref = 1;
6419 if (hold_stcb_lock == 0) {
6420 SCTP_TCB_SEND_LOCK(stcb);
6422 sctp_snd_sb_alloc(stcb, sp->length);
6423 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6424 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6425 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6427 if (hold_stcb_lock == 0) {
6428 SCTP_TCB_SEND_UNLOCK(stcb);
6438 static struct mbuf *
6439 sctp_copy_mbufchain(struct mbuf *clonechain,
6440 struct mbuf *outchain,
6441 struct mbuf **endofchain,
6444 uint8_t copy_by_ref)
6447 struct mbuf *appendchain;
6451 if (endofchain == NULL) {
6455 sctp_m_freem(outchain);
6458 if (can_take_mbuf) {
6459 appendchain = clonechain;
6462 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6464 /* Its not in a cluster */
6465 if (*endofchain == NULL) {
6466 /* lets get a mbuf cluster */
6467 if (outchain == NULL) {
6468 /* This is the general case */
6470 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6471 if (outchain == NULL) {
6474 SCTP_BUF_LEN(outchain) = 0;
6475 *endofchain = outchain;
6476 /* get the prepend space */
6477 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6480 * We really should not get a NULL
6486 if (SCTP_BUF_NEXT(m) == NULL) {
6490 m = SCTP_BUF_NEXT(m);
6493 if (*endofchain == NULL) {
6495 * huh, TSNH XXX maybe we
6498 sctp_m_freem(outchain);
6502 /* get the new end of length */
6503 len = (int)M_TRAILINGSPACE(*endofchain);
6505 /* how much is left at the end? */
6506 len = (int)M_TRAILINGSPACE(*endofchain);
6508 /* Find the end of the data, for appending */
6509 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6511 /* Now lets copy it out */
6512 if (len >= sizeofcpy) {
6513 /* It all fits, copy it in */
6514 m_copydata(clonechain, 0, sizeofcpy, cp);
6515 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6517 /* fill up the end of the chain */
6519 m_copydata(clonechain, 0, len, cp);
6520 SCTP_BUF_LEN((*endofchain)) += len;
6521 /* now we need another one */
6524 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6529 SCTP_BUF_NEXT((*endofchain)) = m;
6531 cp = mtod((*endofchain), caddr_t);
6532 m_copydata(clonechain, len, sizeofcpy, cp);
6533 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6537 /* copy the old fashion way */
6538 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6539 #ifdef SCTP_MBUF_LOGGING
6540 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6541 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6546 if (appendchain == NULL) {
6549 sctp_m_freem(outchain);
6553 /* tack on to the end */
6554 if (*endofchain != NULL) {
6555 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6559 if (SCTP_BUF_NEXT(m) == NULL) {
6560 SCTP_BUF_NEXT(m) = appendchain;
6563 m = SCTP_BUF_NEXT(m);
6567 * save off the end and update the end-chain position
6571 if (SCTP_BUF_NEXT(m) == NULL) {
6575 m = SCTP_BUF_NEXT(m);
6579 /* save off the end and update the end-chain position */
6582 if (SCTP_BUF_NEXT(m) == NULL) {
6586 m = SCTP_BUF_NEXT(m);
6588 return (appendchain);
6593 sctp_med_chunk_output(struct sctp_inpcb *inp,
6594 struct sctp_tcb *stcb,
6595 struct sctp_association *asoc,
6598 int control_only, int from_where,
6599 struct timeval *now, int *now_filled, int frag_point, int so_locked
6600 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6606 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6607 uint32_t val SCTP_UNUSED)
6609 struct sctp_copy_all *ca;
6612 int added_control = 0;
6613 int un_sent, do_chunk_output = 1;
6614 struct sctp_association *asoc;
6615 struct sctp_nets *net;
6617 ca = (struct sctp_copy_all *)ptr;
6618 if (ca->m == NULL) {
6621 if (ca->inp != inp) {
6625 if (ca->sndlen > 0) {
6626 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6628 /* can't copy so we are done */
6632 #ifdef SCTP_MBUF_LOGGING
6633 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6634 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6640 SCTP_TCB_LOCK_ASSERT(stcb);
6641 if (stcb->asoc.alternate) {
6642 net = stcb->asoc.alternate;
6644 net = stcb->asoc.primary_destination;
6646 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6647 /* Abort this assoc with m as the user defined reason */
6649 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6651 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6652 0, M_NOWAIT, 1, MT_DATA);
6653 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6656 struct sctp_paramhdr *ph;
6658 ph = mtod(m, struct sctp_paramhdr *);
6659 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6660 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + ca->sndlen));
6663 * We add one here to keep the assoc from dis-appearing on
6666 atomic_add_int(&stcb->asoc.refcnt, 1);
6667 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6669 * sctp_abort_an_association calls sctp_free_asoc() free
6670 * association will NOT free it since we incremented the
6671 * refcnt .. we do this to prevent it being freed and things
6672 * getting tricky since we could end up (from free_asoc)
6673 * calling inpcb_free which would get a recursive lock call
6674 * to the iterator lock.. But as a consequence of that the
6675 * stcb will return to us un-locked.. since free_asoc
6676 * returns with either no TCB or the TCB unlocked, we must
6677 * relock.. to unlock in the iterator timer :-0
6679 SCTP_TCB_LOCK(stcb);
6680 atomic_add_int(&stcb->asoc.refcnt, -1);
6681 goto no_chunk_output;
6684 ret = sctp_msg_append(stcb, net, m,
6688 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6689 /* shutdown this assoc */
6692 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6694 if (TAILQ_EMPTY(&asoc->send_queue) &&
6695 TAILQ_EMPTY(&asoc->sent_queue) &&
6697 if (asoc->locked_on_sending) {
6701 * there is nothing queued to send, so I'm
6704 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6705 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6706 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6708 * only send SHUTDOWN the first time
6711 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6712 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6714 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6715 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6716 sctp_stop_timers_for_shutdown(stcb);
6717 sctp_send_shutdown(stcb, net);
6718 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6720 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6721 asoc->primary_destination);
6723 do_chunk_output = 0;
6727 * we still got (or just got) data to send,
6728 * so set SHUTDOWN_PENDING
6731 * XXX sockets draft says that SCTP_EOF
6732 * should be sent with no data. currently,
6733 * we will allow user data to be sent first
6734 * and move to SHUTDOWN-PENDING
6736 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6737 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6738 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6739 if (asoc->locked_on_sending) {
6741 * Locked to send out the
6744 struct sctp_stream_queue_pending *sp;
6746 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6748 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6749 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6752 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6753 if (TAILQ_EMPTY(&asoc->send_queue) &&
6754 TAILQ_EMPTY(&asoc->sent_queue) &&
6755 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6756 struct mbuf *op_err;
6757 char msg[SCTP_DIAG_INFO_LEN];
6760 snprintf(msg, sizeof(msg),
6761 "%s:%d at %s", __FILE__, __LINE__, __func__);
6762 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6764 atomic_add_int(&stcb->asoc.refcnt, 1);
6765 sctp_abort_an_association(stcb->sctp_ep, stcb,
6766 op_err, SCTP_SO_NOT_LOCKED);
6767 atomic_add_int(&stcb->asoc.refcnt, -1);
6768 goto no_chunk_output;
6770 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6771 asoc->primary_destination);
6777 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6778 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6780 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6781 (stcb->asoc.total_flight > 0) &&
6782 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6783 do_chunk_output = 0;
6785 if (do_chunk_output)
6786 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6787 else if (added_control) {
6788 int num_out, reason, now_filled = 0;
6792 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6793 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6794 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6805 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6807 struct sctp_copy_all *ca;
6809 ca = (struct sctp_copy_all *)ptr;
6811 * Do a notify here? Kacheong suggests that the notify be done at
6812 * the send time.. so you would push up a notification if any send
6813 * failed. Don't know if this is feasible since the only failures we
6814 * have is "memory" related and if you cannot get an mbuf to send
6815 * the data you surely can't get an mbuf to send up to notify the
6816 * user you can't send the data :->
6819 /* now free everything */
6820 sctp_m_freem(ca->m);
6821 SCTP_FREE(ca, SCTP_M_COPYAL);
6824 static struct mbuf *
6825 sctp_copy_out_all(struct uio *uio, int len)
6827 struct mbuf *ret, *at;
6828 int left, willcpy, cancpy, error;
6830 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6836 SCTP_BUF_LEN(ret) = 0;
6837 /* save space for the data chunk header */
6838 cancpy = (int)M_TRAILINGSPACE(ret);
6839 willcpy = min(cancpy, left);
6842 /* Align data to the end */
6843 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6849 SCTP_BUF_LEN(at) = willcpy;
6850 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6853 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6854 if (SCTP_BUF_NEXT(at) == NULL) {
6857 at = SCTP_BUF_NEXT(at);
6858 SCTP_BUF_LEN(at) = 0;
6859 cancpy = (int)M_TRAILINGSPACE(at);
6860 willcpy = min(cancpy, left);
6867 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6868 struct sctp_sndrcvinfo *srcv)
6871 struct sctp_copy_all *ca;
6873 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6880 memset(ca, 0, sizeof(struct sctp_copy_all));
6884 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6887 * take off the sendall flag, it would be bad if we failed to do
6890 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6891 /* get length and mbuf chain */
6893 ca->sndlen = (int)uio->uio_resid;
6894 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6895 if (ca->m == NULL) {
6896 SCTP_FREE(ca, SCTP_M_COPYAL);
6897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6901 /* Gather the length of the send */
6905 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6906 ca->sndlen += SCTP_BUF_LEN(mat);
6909 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6910 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6911 SCTP_ASOC_ANY_STATE,
6913 sctp_sendall_completes, inp, 1);
6915 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6916 SCTP_FREE(ca, SCTP_M_COPYAL);
6917 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6925 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6927 struct sctp_tmit_chunk *chk, *nchk;
6929 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6930 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6931 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6933 sctp_m_freem(chk->data);
6936 asoc->ctrl_queue_cnt--;
6937 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6943 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6945 struct sctp_association *asoc;
6946 struct sctp_tmit_chunk *chk, *nchk;
6947 struct sctp_asconf_chunk *acp;
6950 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6951 /* find SCTP_ASCONF chunk in queue */
6952 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6954 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6955 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6960 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6962 sctp_m_freem(chk->data);
6965 asoc->ctrl_queue_cnt--;
6966 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6973 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6974 struct sctp_association *asoc,
6975 struct sctp_tmit_chunk **data_list,
6977 struct sctp_nets *net)
6980 struct sctp_tmit_chunk *tp1;
6982 for (i = 0; i < bundle_at; i++) {
6983 /* off of the send queue */
6984 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6985 asoc->send_queue_cnt--;
6988 * Any chunk NOT 0 you zap the time chunk 0 gets
6989 * zapped or set based on if a RTO measurment is
6992 data_list[i]->do_rtt = 0;
6995 data_list[i]->sent_rcv_time = net->last_sent_time;
6996 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6997 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6998 if (data_list[i]->whoTo == NULL) {
6999 data_list[i]->whoTo = net;
7000 atomic_add_int(&net->ref_count, 1);
7002 /* on to the sent queue */
7003 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
7004 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
7005 struct sctp_tmit_chunk *tpp;
7007 /* need to move back */
7009 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
7011 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7015 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
7018 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7020 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7025 /* This does not lower until the cum-ack passes it */
7026 asoc->sent_queue_cnt++;
7027 if ((asoc->peers_rwnd <= 0) &&
7028 (asoc->total_flight == 0) &&
7030 /* Mark the chunk as being a window probe */
7031 SCTP_STAT_INCR(sctps_windowprobed);
7033 #ifdef SCTP_AUDITING_ENABLED
7034 sctp_audit_log(0xC2, 3);
7036 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7037 data_list[i]->snd_count = 1;
7038 data_list[i]->rec.data.chunk_was_revoked = 0;
7039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7040 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7041 data_list[i]->whoTo->flight_size,
7042 data_list[i]->book_size,
7043 (uint32_t) (uintptr_t) data_list[i]->whoTo,
7044 data_list[i]->rec.data.TSN_seq);
7046 sctp_flight_size_increase(data_list[i]);
7047 sctp_total_flight_increase(stcb, data_list[i]);
7048 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7049 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7050 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7052 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7053 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7054 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7055 /* SWS sender side engages */
7056 asoc->peers_rwnd = 0;
7059 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7060 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7065 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7066 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7071 struct sctp_tmit_chunk *chk, *nchk;
7073 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7074 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7075 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7076 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7077 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7078 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7079 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7080 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7081 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7082 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7083 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7084 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7085 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7086 /* Stray chunks must be cleaned up */
7088 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7090 sctp_m_freem(chk->data);
7093 asoc->ctrl_queue_cnt--;
7094 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7095 asoc->fwd_tsn_cnt--;
7096 sctp_free_a_chunk(stcb, chk, so_locked);
7097 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7098 /* special handling, we must look into the param */
7099 if (chk != asoc->str_reset) {
7100 goto clean_up_anyway;
7108 sctp_can_we_split_this(struct sctp_tcb *stcb,
7110 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7113 * Make a decision on if I should split a msg into multiple parts.
7114 * This is only asked of incomplete messages.
7118 * If we are doing EEOR we need to always send it if its the
7119 * entire thing, since it might be all the guy is putting in
7122 if (goal_mtu >= length) {
7124 * If we have data outstanding,
7125 * we get another chance when the sack
7126 * arrives to transmit - wait for more data
7128 if (stcb->asoc.total_flight == 0) {
7130 * If nothing is in flight, we zero the
7138 /* You can fill the rest */
7143 * For those strange folk that make the send buffer
7144 * smaller than our fragmentation point, we can't
7145 * get a full msg in so we have to allow splitting.
7147 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7150 if ((length <= goal_mtu) ||
7151 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7152 /* Sub-optimial residual don't split in non-eeor mode. */
7156 * If we reach here length is larger than the goal_mtu. Do we wish
7157 * to split it for the sake of packet putting together?
7159 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7160 /* Its ok to split it */
7161 return (min(goal_mtu, frag_point));
7163 /* Nope, can't split */
7169 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7170 struct sctp_stream_out *strq,
7172 uint32_t frag_point,
7178 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7183 /* Move from the stream to the send_queue keeping track of the total */
7184 struct sctp_association *asoc;
7185 struct sctp_stream_queue_pending *sp;
7186 struct sctp_tmit_chunk *chk;
7187 struct sctp_data_chunk *dchkh = NULL;
7188 struct sctp_idata_chunk *ndchkh = NULL;
7189 uint32_t to_move, length;
7191 uint8_t rcv_flags = 0;
7193 uint8_t send_lock_up = 0;
7195 SCTP_TCB_LOCK_ASSERT(stcb);
7198 /* sa_ignore FREED_MEMORY */
7200 sp = TAILQ_FIRST(&strq->outqueue);
7203 if (send_lock_up == 0) {
7204 SCTP_TCB_SEND_LOCK(stcb);
7207 sp = TAILQ_FIRST(&strq->outqueue);
7211 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7212 (stcb->asoc.idata_supported == 0) &&
7213 (strq->last_msg_incomplete)) {
7214 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7216 strq->last_msg_incomplete);
7217 strq->last_msg_incomplete = 0;
7221 SCTP_TCB_SEND_UNLOCK(stcb);
7226 if ((sp->msg_is_complete) && (sp->length == 0)) {
7227 if (sp->sender_all_done) {
7229 * We are doing differed cleanup. Last time through
7230 * when we took all the data the sender_all_done was
7233 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7234 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7235 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7236 sp->sender_all_done,
7238 sp->msg_is_complete,
7242 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7243 SCTP_TCB_SEND_LOCK(stcb);
7246 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7247 TAILQ_REMOVE(&strq->outqueue, sp, next);
7248 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7249 (strq->chunks_on_queues == 0) &&
7250 TAILQ_EMPTY(&strq->outqueue)) {
7251 stcb->asoc.trigger_reset = 1;
7253 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7255 sctp_free_remote_addr(sp->net);
7259 sctp_m_freem(sp->data);
7262 sctp_free_a_strmoq(stcb, sp, so_locked);
7263 /* we can't be locked to it */
7265 stcb->asoc.locked_on_sending = NULL;
7267 SCTP_TCB_SEND_UNLOCK(stcb);
7270 /* back to get the next msg */
7274 * sender just finished this but still holds a
7277 if (stcb->asoc.idata_supported == 0)
7284 /* is there some to get */
7285 if (sp->length == 0) {
7287 if (stcb->asoc.idata_supported == 0)
7292 } else if (sp->discard_rest) {
7293 if (send_lock_up == 0) {
7294 SCTP_TCB_SEND_LOCK(stcb);
7297 /* Whack down the size */
7298 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7299 if ((stcb->sctp_socket != NULL) &&
7300 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7301 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7302 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7305 sctp_m_freem(sp->data);
7307 sp->tail_mbuf = NULL;
7311 if (stcb->asoc.idata_supported == 0)
7318 some_taken = sp->some_taken;
7320 length = sp->length;
7321 if (sp->msg_is_complete) {
7322 /* The message is complete */
7323 to_move = min(length, frag_point);
7324 if (to_move == length) {
7325 /* All of it fits in the MTU */
7326 if (sp->some_taken) {
7327 rcv_flags |= SCTP_DATA_LAST_FRAG;
7329 rcv_flags |= SCTP_DATA_NOT_FRAG;
7331 sp->put_last_out = 1;
7332 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7333 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7336 /* Not all of it fits, we fragment */
7337 if (sp->some_taken == 0) {
7338 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7343 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7346 * We use a snapshot of length in case it
7347 * is expanding during the compare.
7352 if (to_move >= llen) {
7354 if (send_lock_up == 0) {
7356 * We are taking all of an incomplete msg
7357 * thus we need a send lock.
7359 SCTP_TCB_SEND_LOCK(stcb);
7361 if (sp->msg_is_complete) {
7363 * the sender finished the
7370 if (sp->some_taken == 0) {
7371 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7375 /* Nothing to take. */
7376 if ((sp->some_taken) &&
7377 (stcb->asoc.idata_supported == 0)) {
7386 /* If we reach here, we can copy out a chunk */
7387 sctp_alloc_a_chunk(stcb, chk);
7389 /* No chunk memory */
7395 * Setup for unordered if needed by looking at the user sent info
7398 if (sp->sinfo_flags & SCTP_UNORDERED) {
7399 rcv_flags |= SCTP_DATA_UNORDERED;
7401 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7402 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7403 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7405 /* clear out the chunk before setting up */
7406 memset(chk, 0, sizeof(*chk));
7407 chk->rec.data.rcv_flags = rcv_flags;
7409 if (to_move >= length) {
7410 /* we think we can steal the whole thing */
7411 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7412 SCTP_TCB_SEND_LOCK(stcb);
7415 if (to_move < sp->length) {
7416 /* bail, it changed */
7419 chk->data = sp->data;
7420 chk->last_mbuf = sp->tail_mbuf;
7421 /* register the stealing */
7422 sp->data = sp->tail_mbuf = NULL;
7427 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7428 chk->last_mbuf = NULL;
7429 if (chk->data == NULL) {
7430 sp->some_taken = some_taken;
7431 sctp_free_a_chunk(stcb, chk, so_locked);
7436 #ifdef SCTP_MBUF_LOGGING
7437 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7438 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7441 /* Pull off the data */
7442 m_adj(sp->data, to_move);
7443 /* Now lets work our way down and compact it */
7445 while (m && (SCTP_BUF_LEN(m) == 0)) {
7446 sp->data = SCTP_BUF_NEXT(m);
7447 SCTP_BUF_NEXT(m) = NULL;
7448 if (sp->tail_mbuf == m) {
7450 * Freeing tail? TSNH since
7451 * we supposedly were taking less
7452 * than the sp->length.
7455 panic("Huh, freing tail? - TSNH");
7457 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7458 sp->tail_mbuf = sp->data = NULL;
7467 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7468 chk->copy_by_ref = 1;
7470 chk->copy_by_ref = 0;
7473 * get last_mbuf and counts of mb usage This is ugly but hopefully
7474 * its only one mbuf.
7476 if (chk->last_mbuf == NULL) {
7477 chk->last_mbuf = chk->data;
7478 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7479 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7482 if (to_move > length) {
7483 /*- This should not happen either
7484 * since we always lower to_move to the size
7485 * of sp->length if its larger.
7488 panic("Huh, how can to_move be larger?");
7490 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7494 atomic_subtract_int(&sp->length, to_move);
7496 if (stcb->asoc.idata_supported == 0) {
7497 leading = sizeof(struct sctp_data_chunk);
7499 leading = sizeof(struct sctp_idata_chunk);
7501 if (M_LEADINGSPACE(chk->data) < leading) {
7502 /* Not enough room for a chunk header, get some */
7505 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7508 * we're in trouble here. _PREPEND below will free
7509 * all the data if there is no leading space, so we
7510 * must put the data back and restore.
7512 if (send_lock_up == 0) {
7513 SCTP_TCB_SEND_LOCK(stcb);
7516 if (sp->data == NULL) {
7517 /* unsteal the data */
7518 sp->data = chk->data;
7519 sp->tail_mbuf = chk->last_mbuf;
7523 /* reassemble the data */
7525 sp->data = chk->data;
7526 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7528 sp->some_taken = some_taken;
7529 atomic_add_int(&sp->length, to_move);
7532 sctp_free_a_chunk(stcb, chk, so_locked);
7536 SCTP_BUF_LEN(m) = 0;
7537 SCTP_BUF_NEXT(m) = chk->data;
7539 M_ALIGN(chk->data, 4);
7542 if (stcb->asoc.idata_supported == 0) {
7543 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7545 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
7547 if (chk->data == NULL) {
7548 /* HELP, TSNH since we assured it would not above? */
7550 panic("prepend failes HELP?");
7552 SCTP_PRINTF("prepend fails HELP?\n");
7553 sctp_free_a_chunk(stcb, chk, so_locked);
7559 if (stcb->asoc.idata_supported == 0) {
7560 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7561 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_data_chunk));
7563 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
7564 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_idata_chunk));
7566 chk->book_size_scale = 0;
7567 chk->sent = SCTP_DATAGRAM_UNSENT;
7570 chk->asoc = &stcb->asoc;
7571 chk->pad_inplace = 0;
7572 chk->no_fr_allowed = 0;
7573 if (stcb->asoc.idata_supported == 0) {
7574 if (rcv_flags & SCTP_DATA_UNORDERED) {
7575 /* Just use 0. The receiver ignores the values. */
7576 chk->rec.data.stream_seq = 0;
7578 chk->rec.data.stream_seq = strq->next_mid_ordered;
7579 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7580 strq->next_mid_ordered++;
7584 if (rcv_flags & SCTP_DATA_UNORDERED) {
7585 chk->rec.data.stream_seq = strq->next_mid_unordered;
7586 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7587 strq->next_mid_unordered++;
7590 chk->rec.data.stream_seq = strq->next_mid_ordered;
7591 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7592 strq->next_mid_ordered++;
7596 chk->rec.data.stream_number = sp->stream;
7597 chk->rec.data.payloadtype = sp->ppid;
7598 chk->rec.data.context = sp->context;
7599 chk->rec.data.doing_fast_retransmit = 0;
7601 chk->rec.data.timetodrop = sp->ts;
7602 chk->flags = sp->act_flags;
7605 chk->whoTo = sp->net;
7606 atomic_add_int(&chk->whoTo->ref_count, 1);
7610 if (sp->holds_key_ref) {
7611 chk->auth_keyid = sp->auth_keyid;
7612 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7613 chk->holds_key_ref = 1;
7615 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7616 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7617 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7618 (uint32_t) (uintptr_t) stcb, sp->length,
7619 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7620 chk->rec.data.TSN_seq);
7622 if (stcb->asoc.idata_supported == 0) {
7623 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7625 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7628 * Put the rest of the things in place now. Size was done earlier in
7629 * previous loop prior to padding.
7632 #ifdef SCTP_ASOCLOG_OF_TSNS
7633 SCTP_TCB_LOCK_ASSERT(stcb);
7634 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7635 asoc->tsn_out_at = 0;
7636 asoc->tsn_out_wrapped = 1;
7638 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7639 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7640 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7641 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7642 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7643 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7644 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7645 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7648 if (stcb->asoc.idata_supported == 0) {
7649 dchkh->ch.chunk_type = SCTP_DATA;
7650 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7651 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7652 dchkh->dp.stream_id = htons((strq->stream_no & 0x0000ffff));
7653 dchkh->dp.stream_sequence = htons((uint16_t) chk->rec.data.stream_seq);
7654 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7655 dchkh->ch.chunk_length = htons(chk->send_size);
7657 ndchkh->ch.chunk_type = SCTP_IDATA;
7658 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7659 ndchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7660 ndchkh->dp.stream_id = htons(strq->stream_no);
7661 ndchkh->dp.reserved = htons(0);
7662 ndchkh->dp.msg_id = htonl(chk->rec.data.stream_seq);
7664 ndchkh->dp.ppid_fsn.protocol_id = chk->rec.data.payloadtype;
7666 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7668 ndchkh->ch.chunk_length = htons(chk->send_size);
7670 /* Now advance the chk->send_size by the actual pad needed. */
7671 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7676 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7677 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7679 chk->last_mbuf = lm;
7680 chk->pad_inplace = 1;
7682 chk->send_size += pads;
7684 if (PR_SCTP_ENABLED(chk->flags)) {
7685 asoc->pr_sctp_cnt++;
7687 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7688 /* All done pull and kill the message */
7689 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7690 if (sp->put_last_out == 0) {
7691 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7692 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7693 sp->sender_all_done,
7695 sp->msg_is_complete,
7699 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7700 SCTP_TCB_SEND_LOCK(stcb);
7703 TAILQ_REMOVE(&strq->outqueue, sp, next);
7704 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7705 (strq->chunks_on_queues == 0) &&
7706 TAILQ_EMPTY(&strq->outqueue)) {
7707 stcb->asoc.trigger_reset = 1;
7709 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7711 sctp_free_remote_addr(sp->net);
7715 sctp_m_freem(sp->data);
7718 sctp_free_a_strmoq(stcb, sp, so_locked);
7720 /* we can't be locked to it */
7722 stcb->asoc.locked_on_sending = NULL;
7724 /* more to go, we are locked */
7725 if (stcb->asoc.idata_supported == 0)
7728 asoc->chunks_on_out_queue++;
7729 strq->chunks_on_queues++;
7730 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7731 asoc->send_queue_cnt++;
7734 SCTP_TCB_SEND_UNLOCK(stcb);
7741 sctp_fill_outqueue(struct sctp_tcb *stcb,
7742 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7743 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7748 struct sctp_association *asoc;
7749 struct sctp_stream_out *strq;
7750 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7753 SCTP_TCB_LOCK_ASSERT(stcb);
7755 switch (net->ro._l_addr.sa.sa_family) {
7758 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7763 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7768 goal_mtu = net->mtu;
7771 /* Need an allowance for the data chunk header too */
7772 if (stcb->asoc.idata_supported == 0) {
7773 goal_mtu -= sizeof(struct sctp_data_chunk);
7775 goal_mtu -= sizeof(struct sctp_idata_chunk);
7778 /* must make even word boundary */
7779 goal_mtu &= 0xfffffffc;
7780 if (asoc->locked_on_sending) {
7781 /* We are stuck on one stream until the message completes. */
7782 strq = asoc->locked_on_sending;
7785 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7788 while ((goal_mtu > 0) && strq) {
7791 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7792 &giveup, eeor_mode, &bail, so_locked);
7794 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7797 asoc->locked_on_sending = strq;
7798 if ((moved_how_much == 0) || (giveup) || bail)
7799 /* no more to move for now */
7802 asoc->locked_on_sending = NULL;
7803 if ((giveup) || bail) {
7806 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7811 total_moved += moved_how_much;
7812 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7813 goal_mtu &= 0xfffffffc;
7818 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7820 if (total_moved == 0) {
7821 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7822 (net == stcb->asoc.primary_destination)) {
7823 /* ran dry for primary network net */
7824 SCTP_STAT_INCR(sctps_primary_randry);
7825 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7826 /* ran dry with CMT on */
7827 SCTP_STAT_INCR(sctps_cmt_randry);
7833 sctp_fix_ecn_echo(struct sctp_association *asoc)
7835 struct sctp_tmit_chunk *chk;
7837 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7838 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7839 chk->sent = SCTP_DATAGRAM_UNSENT;
7845 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7847 struct sctp_association *asoc;
7848 struct sctp_tmit_chunk *chk;
7849 struct sctp_stream_queue_pending *sp;
7856 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7857 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7858 if (sp->net == net) {
7859 sctp_free_remote_addr(sp->net);
7864 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7865 if (chk->whoTo == net) {
7866 sctp_free_remote_addr(chk->whoTo);
7873 sctp_med_chunk_output(struct sctp_inpcb *inp,
7874 struct sctp_tcb *stcb,
7875 struct sctp_association *asoc,
7878 int control_only, int from_where,
7879 struct timeval *now, int *now_filled, int frag_point, int so_locked
7880 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7886 * Ok this is the generic chunk service queue. we must do the
7888 * - Service the stream queue that is next, moving any
7889 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7890 * LAST to the out queue in one pass) and assigning TSN's. This
7891 * only applys though if the peer does not support NDATA. For NDATA
7892 * chunks its ok to not send the entire message ;-)
7893 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7894 * fomulate and send the low level chunks. Making sure to combine
7895 * any control in the control chunk queue also.
7897 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7898 struct mbuf *outchain, *endoutchain;
7899 struct sctp_tmit_chunk *chk, *nchk;
7901 /* temp arrays for unlinking */
7902 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7903 int no_fragmentflg, error;
7904 unsigned int max_rwnd_per_dest, max_send_per_dest;
7905 int one_chunk, hbflag, skip_data_for_this_net;
7906 int asconf, cookie, no_out_cnt;
7907 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7908 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7910 uint32_t auth_offset = 0;
7911 struct sctp_auth_chunk *auth = NULL;
7912 uint16_t auth_keyid;
7913 int override_ok = 1;
7914 int skip_fill_up = 0;
7915 int data_auth_reqd = 0;
7918 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7925 auth_keyid = stcb->asoc.authinfo.active_keyid;
7926 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7927 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7928 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7933 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7935 * First lets prime the pump. For each destination, if there is room
7936 * in the flight size, attempt to pull an MTU's worth out of the
7937 * stream queues into the general send_queue
7939 #ifdef SCTP_AUDITING_ENABLED
7940 sctp_audit_log(0xC2, 2);
7942 SCTP_TCB_LOCK_ASSERT(stcb);
7949 /* Nothing to possible to send? */
7950 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7951 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7952 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7953 TAILQ_EMPTY(&asoc->send_queue) &&
7954 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7959 if (asoc->peers_rwnd == 0) {
7960 /* No room in peers rwnd */
7962 if (asoc->total_flight > 0) {
7963 /* we are allowed one chunk in flight */
7967 if (stcb->asoc.ecn_echo_cnt_onq) {
7968 /* Record where a sack goes, if any */
7969 if (no_data_chunks &&
7970 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7971 /* Nothing but ECNe to send - we don't do that */
7972 goto nothing_to_send;
7974 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7975 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7976 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7977 sack_goes_to = chk->whoTo;
7982 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7983 if (stcb->sctp_socket)
7984 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7986 max_send_per_dest = 0;
7987 if (no_data_chunks == 0) {
7988 /* How many non-directed chunks are there? */
7989 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7990 if (chk->whoTo == NULL) {
7992 * We already have non-directed chunks on
7993 * the queue, no need to do a fill-up.
8001 if ((no_data_chunks == 0) &&
8002 (skip_fill_up == 0) &&
8003 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
8004 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
8006 * This for loop we are in takes in each net, if
8007 * its's got space in cwnd and has data sent to it
8008 * (when CMT is off) then it calls
8009 * sctp_fill_outqueue for the net. This gets data on
8010 * the send queue for that network.
8012 * In sctp_fill_outqueue TSN's are assigned and data is
8013 * copied out of the stream buffers. Note mostly
8014 * copy by reference (we hope).
8016 net->window_probe = 0;
8017 if ((net != stcb->asoc.alternate) &&
8018 ((net->dest_state & SCTP_ADDR_PF) ||
8019 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
8020 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
8021 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8022 sctp_log_cwnd(stcb, net, 1,
8023 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8027 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
8028 (net->flight_size == 0)) {
8029 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
8031 if (net->flight_size >= net->cwnd) {
8032 /* skip this network, no room - can't fill */
8033 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8034 sctp_log_cwnd(stcb, net, 3,
8035 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8040 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8042 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
8044 /* memory alloc failure */
8050 /* now service each destination and send out what we can for it */
8051 /* Nothing to send? */
8052 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8053 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8054 TAILQ_EMPTY(&asoc->send_queue)) {
8058 if (asoc->sctp_cmt_on_off > 0) {
8059 /* get the last start point */
8060 start_at = asoc->last_net_cmt_send_started;
8061 if (start_at == NULL) {
8062 /* null so to beginning */
8063 start_at = TAILQ_FIRST(&asoc->nets);
8065 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8066 if (start_at == NULL) {
8067 start_at = TAILQ_FIRST(&asoc->nets);
8070 asoc->last_net_cmt_send_started = start_at;
8072 start_at = TAILQ_FIRST(&asoc->nets);
8074 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8075 if (chk->whoTo == NULL) {
8076 if (asoc->alternate) {
8077 chk->whoTo = asoc->alternate;
8079 chk->whoTo = asoc->primary_destination;
8081 atomic_add_int(&chk->whoTo->ref_count, 1);
8084 old_start_at = NULL;
8085 again_one_more_time:
8086 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8087 /* how much can we send? */
8088 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8089 if (old_start_at && (old_start_at == net)) {
8090 /* through list ocmpletely. */
8094 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8095 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8096 (net->flight_size >= net->cwnd)) {
8098 * Nothing on control or asconf and flight is full,
8099 * we can skip even in the CMT case.
8104 endoutchain = outchain = NULL;
8107 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8108 skip_data_for_this_net = 1;
8110 skip_data_for_this_net = 0;
8112 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8115 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8120 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8130 if (mtu > asoc->peers_rwnd) {
8131 if (asoc->total_flight > 0) {
8132 /* We have a packet in flight somewhere */
8133 r_mtu = asoc->peers_rwnd;
8135 /* We are always allowed to send one MTU out */
8143 /************************/
8144 /* ASCONF transmission */
8145 /************************/
8146 /* Now first lets go through the asconf queue */
8147 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8148 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8151 if (chk->whoTo == NULL) {
8152 if (asoc->alternate == NULL) {
8153 if (asoc->primary_destination != net) {
8157 if (asoc->alternate != net) {
8162 if (chk->whoTo != net) {
8166 if (chk->data == NULL) {
8169 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8170 chk->sent != SCTP_DATAGRAM_RESEND) {
8174 * if no AUTH is yet included and this chunk
8175 * requires it, make sure to account for it. We
8176 * don't apply the size until the AUTH chunk is
8177 * actually added below in case there is no room for
8178 * this chunk. NOTE: we overload the use of "omtu"
8181 if ((auth == NULL) &&
8182 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8183 stcb->asoc.peer_auth_chunks)) {
8184 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8187 /* Here we do NOT factor the r_mtu */
8188 if ((chk->send_size < (int)(mtu - omtu)) ||
8189 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8191 * We probably should glom the mbuf chain
8192 * from the chk->data for control but the
8193 * problem is it becomes yet one more level
8194 * of tracking to do if for some reason
8195 * output fails. Then I have got to
8196 * reconstruct the merged control chain.. el
8197 * yucko.. for now we take the easy way and
8201 * Add an AUTH chunk, if chunk requires it
8202 * save the offset into the chain for AUTH
8204 if ((auth == NULL) &&
8205 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8206 stcb->asoc.peer_auth_chunks))) {
8207 outchain = sctp_add_auth_chunk(outchain,
8212 chk->rec.chunk_id.id);
8213 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8215 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8216 (int)chk->rec.chunk_id.can_take_data,
8217 chk->send_size, chk->copy_by_ref);
8218 if (outchain == NULL) {
8220 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8223 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8224 /* update our MTU size */
8225 if (mtu > (chk->send_size + omtu))
8226 mtu -= (chk->send_size + omtu);
8229 to_out += (chk->send_size + omtu);
8230 /* Do clear IP_DF ? */
8231 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8234 if (chk->rec.chunk_id.can_take_data)
8237 * set hb flag since we can use these for
8243 * should sysctl this: don't bundle data
8244 * with ASCONF since it requires AUTH
8247 chk->sent = SCTP_DATAGRAM_SENT;
8248 if (chk->whoTo == NULL) {
8250 atomic_add_int(&net->ref_count, 1);
8255 * Ok we are out of room but we can
8256 * output without effecting the
8257 * flight size since this little guy
8258 * is a control only packet.
8260 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8262 * do NOT clear the asconf flag as
8263 * it is used to do appropriate
8264 * source address selection.
8266 if (*now_filled == 0) {
8267 (void)SCTP_GETTIME_TIMEVAL(now);
8270 net->last_sent_time = *now;
8272 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8273 (struct sockaddr *)&net->ro._l_addr,
8274 outchain, auth_offset, auth,
8275 stcb->asoc.authinfo.active_keyid,
8276 no_fragmentflg, 0, asconf,
8277 inp->sctp_lport, stcb->rport,
8278 htonl(stcb->asoc.peer_vtag),
8283 * error, we could not
8286 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8287 if (from_where == 0) {
8288 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8290 if (error == ENOBUFS) {
8291 asoc->ifp_had_enobuf = 1;
8292 SCTP_STAT_INCR(sctps_lowlevelerr);
8294 /* error, could not output */
8295 if (error == EHOSTUNREACH) {
8301 sctp_move_chunks_from_net(stcb, net);
8306 asoc->ifp_had_enobuf = 0;
8309 * increase the number we sent, if a
8310 * cookie is sent we don't tell them
8313 outchain = endoutchain = NULL;
8317 *num_out += ctl_cnt;
8318 /* recalc a clean slate and setup */
8319 switch (net->ro._l_addr.sa.sa_family) {
8322 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8327 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8344 /************************/
8345 /* Control transmission */
8346 /************************/
8347 /* Now first lets go through the control queue */
8348 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8349 if ((sack_goes_to) &&
8350 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8351 (chk->whoTo != sack_goes_to)) {
8353 * if we have a sack in queue, and we are
8354 * looking at an ecn echo that is NOT queued
8355 * to where the sack is going..
8357 if (chk->whoTo == net) {
8359 * Don't transmit it to where its
8360 * going (current net)
8363 } else if (sack_goes_to == net) {
8365 * But do transmit it to this
8368 goto skip_net_check;
8371 if (chk->whoTo == NULL) {
8372 if (asoc->alternate == NULL) {
8373 if (asoc->primary_destination != net) {
8377 if (asoc->alternate != net) {
8382 if (chk->whoTo != net) {
8387 if (chk->data == NULL) {
8390 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8392 * It must be unsent. Cookies and ASCONF's
8393 * hang around but there timers will force
8394 * when marked for resend.
8399 * if no AUTH is yet included and this chunk
8400 * requires it, make sure to account for it. We
8401 * don't apply the size until the AUTH chunk is
8402 * actually added below in case there is no room for
8403 * this chunk. NOTE: we overload the use of "omtu"
8406 if ((auth == NULL) &&
8407 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8408 stcb->asoc.peer_auth_chunks)) {
8409 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8412 /* Here we do NOT factor the r_mtu */
8413 if ((chk->send_size <= (int)(mtu - omtu)) ||
8414 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8416 * We probably should glom the mbuf chain
8417 * from the chk->data for control but the
8418 * problem is it becomes yet one more level
8419 * of tracking to do if for some reason
8420 * output fails. Then I have got to
8421 * reconstruct the merged control chain.. el
8422 * yucko.. for now we take the easy way and
8426 * Add an AUTH chunk, if chunk requires it
8427 * save the offset into the chain for AUTH
8429 if ((auth == NULL) &&
8430 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8431 stcb->asoc.peer_auth_chunks))) {
8432 outchain = sctp_add_auth_chunk(outchain,
8437 chk->rec.chunk_id.id);
8438 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8440 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8441 (int)chk->rec.chunk_id.can_take_data,
8442 chk->send_size, chk->copy_by_ref);
8443 if (outchain == NULL) {
8445 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8448 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8449 /* update our MTU size */
8450 if (mtu > (chk->send_size + omtu))
8451 mtu -= (chk->send_size + omtu);
8454 to_out += (chk->send_size + omtu);
8455 /* Do clear IP_DF ? */
8456 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8459 if (chk->rec.chunk_id.can_take_data)
8461 /* Mark things to be removed, if needed */
8462 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8463 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8464 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8465 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8466 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8467 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8468 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8469 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8470 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8471 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8472 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8473 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8476 /* remove these chunks at the end */
8477 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8478 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8479 /* turn off the timer */
8480 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8481 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8483 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8489 * Other chunks, since they have
8490 * timers running (i.e. COOKIE) we
8491 * just "trust" that it gets sent or
8495 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8498 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8500 * Increment ecne send count
8501 * here this means we may be
8502 * over-zealous in our
8503 * counting if the send
8504 * fails, but its the best
8505 * place to do it (we used
8506 * to do it in the queue of
8507 * the chunk, but that did
8508 * not tell how many times
8511 SCTP_STAT_INCR(sctps_sendecne);
8513 chk->sent = SCTP_DATAGRAM_SENT;
8514 if (chk->whoTo == NULL) {
8516 atomic_add_int(&net->ref_count, 1);
8522 * Ok we are out of room but we can
8523 * output without effecting the
8524 * flight size since this little guy
8525 * is a control only packet.
8528 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8530 * do NOT clear the asconf
8531 * flag as it is used to do
8532 * appropriate source
8533 * address selection.
8537 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8540 /* Only HB or ASCONF advances time */
8542 if (*now_filled == 0) {
8543 (void)SCTP_GETTIME_TIMEVAL(now);
8546 net->last_sent_time = *now;
8549 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8550 (struct sockaddr *)&net->ro._l_addr,
8553 stcb->asoc.authinfo.active_keyid,
8554 no_fragmentflg, 0, asconf,
8555 inp->sctp_lport, stcb->rport,
8556 htonl(stcb->asoc.peer_vtag),
8561 * error, we could not
8564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8565 if (from_where == 0) {
8566 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8568 if (error == ENOBUFS) {
8569 asoc->ifp_had_enobuf = 1;
8570 SCTP_STAT_INCR(sctps_lowlevelerr);
8572 if (error == EHOSTUNREACH) {
8578 sctp_move_chunks_from_net(stcb, net);
8583 asoc->ifp_had_enobuf = 0;
8586 * increase the number we sent, if a
8587 * cookie is sent we don't tell them
8590 outchain = endoutchain = NULL;
8594 *num_out += ctl_cnt;
8595 /* recalc a clean slate and setup */
8596 switch (net->ro._l_addr.sa.sa_family) {
8599 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8604 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8621 /* JRI: if dest is in PF state, do not send data to it */
8622 if ((asoc->sctp_cmt_on_off > 0) &&
8623 (net != stcb->asoc.alternate) &&
8624 (net->dest_state & SCTP_ADDR_PF)) {
8627 if (net->flight_size >= net->cwnd) {
8630 if ((asoc->sctp_cmt_on_off > 0) &&
8631 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8632 (net->flight_size > max_rwnd_per_dest)) {
8636 * We need a specific accounting for the usage of the send
8637 * buffer. We also need to check the number of messages per
8638 * net. For now, this is better than nothing and it disabled
8641 if ((asoc->sctp_cmt_on_off > 0) &&
8642 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8643 (max_send_per_dest > 0) &&
8644 (net->flight_size > max_send_per_dest)) {
8647 /*********************/
8648 /* Data transmission */
8649 /*********************/
8651 * if AUTH for DATA is required and no AUTH has been added
8652 * yet, account for this in the mtu now... if no data can be
8653 * bundled, this adjustment won't matter anyways since the
8654 * packet will be going out...
8656 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8657 stcb->asoc.peer_auth_chunks);
8658 if (data_auth_reqd && (auth == NULL)) {
8659 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8661 /* now lets add any data within the MTU constraints */
8662 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8665 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8666 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8673 if (net->mtu > SCTP_MIN_OVERHEAD)
8674 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8684 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8685 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8686 (skip_data_for_this_net == 0)) ||
8688 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8689 if (no_data_chunks) {
8690 /* let only control go out */
8694 if (net->flight_size >= net->cwnd) {
8695 /* skip this net, no room for data */
8699 if ((chk->whoTo != NULL) &&
8700 (chk->whoTo != net)) {
8701 /* Don't send the chunk on this net */
8704 if (asoc->sctp_cmt_on_off == 0) {
8705 if ((asoc->alternate) &&
8706 (asoc->alternate != net) &&
8707 (chk->whoTo == NULL)) {
8709 } else if ((net != asoc->primary_destination) &&
8710 (asoc->alternate == NULL) &&
8711 (chk->whoTo == NULL)) {
8715 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8717 * strange, we have a chunk that is
8718 * to big for its destination and
8719 * yet no fragment ok flag.
8720 * Something went wrong when the
8721 * PMTU changed...we did not mark
8722 * this chunk for some reason?? I
8723 * will fix it here by letting IP
8724 * fragment it for now and printing
8725 * a warning. This really should not
8728 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8729 chk->send_size, mtu);
8730 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8732 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8733 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8734 struct sctp_data_chunk *dchkh;
8736 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8737 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8739 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8740 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8741 /* ok we will add this one */
8744 * Add an AUTH chunk, if chunk
8745 * requires it, save the offset into
8746 * the chain for AUTH
8748 if (data_auth_reqd) {
8750 outchain = sctp_add_auth_chunk(outchain,
8756 auth_keyid = chk->auth_keyid;
8758 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8759 } else if (override_ok) {
8764 auth_keyid = chk->auth_keyid;
8766 } else if (auth_keyid != chk->auth_keyid) {
8774 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8775 chk->send_size, chk->copy_by_ref);
8776 if (outchain == NULL) {
8777 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8778 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8779 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8782 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8785 /* upate our MTU size */
8786 /* Do clear IP_DF ? */
8787 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8790 /* unsigned subtraction of mtu */
8791 if (mtu > chk->send_size)
8792 mtu -= chk->send_size;
8795 /* unsigned subtraction of r_mtu */
8796 if (r_mtu > chk->send_size)
8797 r_mtu -= chk->send_size;
8801 to_out += chk->send_size;
8802 if ((to_out > mx_mtu) && no_fragmentflg) {
8804 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8806 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8810 chk->window_probe = 0;
8811 data_list[bundle_at++] = chk;
8812 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8815 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8816 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8817 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8819 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8821 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8822 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8832 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8834 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8835 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8836 data_list[0]->window_probe = 1;
8837 net->window_probe = 1;
8843 * Must be sent in order of the
8844 * TSN's (on a network)
8848 } /* for (chunk gather loop for this net) */
8849 } /* if asoc.state OPEN */
8851 /* Is there something to send for this destination? */
8853 /* We may need to start a control timer or two */
8855 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8858 * do NOT clear the asconf flag as it is
8859 * used to do appropriate source address
8864 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8867 /* must start a send timer if data is being sent */
8868 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8870 * no timer running on this destination
8873 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8875 if (bundle_at || hbflag) {
8876 /* For data/asconf and hb set time */
8877 if (*now_filled == 0) {
8878 (void)SCTP_GETTIME_TIMEVAL(now);
8881 net->last_sent_time = *now;
8883 /* Now send it, if there is anything to send :> */
8884 if ((error = sctp_lowlevel_chunk_output(inp,
8887 (struct sockaddr *)&net->ro._l_addr,
8895 inp->sctp_lport, stcb->rport,
8896 htonl(stcb->asoc.peer_vtag),
8900 /* error, we could not output */
8901 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8902 if (from_where == 0) {
8903 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8905 if (error == ENOBUFS) {
8906 SCTP_STAT_INCR(sctps_lowlevelerr);
8907 asoc->ifp_had_enobuf = 1;
8909 if (error == EHOSTUNREACH) {
8911 * Destination went unreachable
8914 sctp_move_chunks_from_net(stcb, net);
8918 * I add this line to be paranoid. As far as
8919 * I can tell the continue, takes us back to
8920 * the top of the for, but just to make sure
8921 * I will reset these again here.
8923 ctl_cnt = bundle_at = 0;
8924 continue; /* This takes us back to the
8925 * for() for the nets. */
8927 asoc->ifp_had_enobuf = 0;
8933 *num_out += (ctl_cnt + bundle_at);
8936 /* setup for a RTO measurement */
8937 tsns_sent = data_list[0]->rec.data.TSN_seq;
8938 /* fill time if not already filled */
8939 if (*now_filled == 0) {
8940 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8942 *now = asoc->time_last_sent;
8944 asoc->time_last_sent = *now;
8946 if (net->rto_needed) {
8947 data_list[0]->do_rtt = 1;
8948 net->rto_needed = 0;
8950 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8951 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8957 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8958 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8961 if (old_start_at == NULL) {
8962 old_start_at = start_at;
8963 start_at = TAILQ_FIRST(&asoc->nets);
8965 goto again_one_more_time;
8968 * At the end there should be no NON timed chunks hanging on this
8971 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8972 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8974 if ((*num_out == 0) && (*reason_code == 0)) {
8979 sctp_clean_up_ctl(stcb, asoc, so_locked);
8984 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8987 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8988 * the control chunk queue.
8990 struct sctp_chunkhdr *hdr;
8991 struct sctp_tmit_chunk *chk;
8992 struct mbuf *mat, *last_mbuf;
8993 uint32_t chunk_length;
8994 uint16_t padding_length;
8996 SCTP_TCB_LOCK_ASSERT(stcb);
8997 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8998 if (op_err == NULL) {
9003 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
9004 chunk_length += SCTP_BUF_LEN(mat);
9005 if (SCTP_BUF_NEXT(mat) == NULL) {
9009 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
9010 sctp_m_freem(op_err);
9013 padding_length = chunk_length % 4;
9014 if (padding_length != 0) {
9015 padding_length = 4 - padding_length;
9017 if (padding_length != 0) {
9018 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
9019 sctp_m_freem(op_err);
9023 sctp_alloc_a_chunk(stcb, chk);
9026 sctp_m_freem(op_err);
9029 chk->copy_by_ref = 0;
9030 chk->send_size = (uint16_t) chunk_length;
9031 chk->sent = SCTP_DATAGRAM_UNSENT;
9033 chk->asoc = &stcb->asoc;
9036 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
9037 chk->rec.chunk_id.can_take_data = 0;
9038 hdr = mtod(op_err, struct sctp_chunkhdr *);
9039 hdr->chunk_type = SCTP_OPERATION_ERROR;
9040 hdr->chunk_flags = 0;
9041 hdr->chunk_length = htons(chk->send_size);
9042 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9043 chk->asoc->ctrl_queue_cnt++;
9047 sctp_send_cookie_echo(struct mbuf *m,
9049 struct sctp_tcb *stcb,
9050 struct sctp_nets *net)
9053 * pull out the cookie and put it at the front of the control chunk
9057 struct mbuf *cookie;
9058 struct sctp_paramhdr parm, *phdr;
9059 struct sctp_chunkhdr *hdr;
9060 struct sctp_tmit_chunk *chk;
9061 uint16_t ptype, plen;
9063 SCTP_TCB_LOCK_ASSERT(stcb);
9064 /* First find the cookie in the param area */
9066 at = offset + sizeof(struct sctp_init_chunk);
9068 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
9072 ptype = ntohs(phdr->param_type);
9073 plen = ntohs(phdr->param_length);
9074 if (ptype == SCTP_STATE_COOKIE) {
9077 /* found the cookie */
9078 if ((pad = (plen % 4))) {
9081 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9082 if (cookie == NULL) {
9086 #ifdef SCTP_MBUF_LOGGING
9087 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9088 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9093 at += SCTP_SIZE32(plen);
9095 /* ok, we got the cookie lets change it into a cookie echo chunk */
9096 /* first the change from param to cookie */
9097 hdr = mtod(cookie, struct sctp_chunkhdr *);
9098 hdr->chunk_type = SCTP_COOKIE_ECHO;
9099 hdr->chunk_flags = 0;
9100 /* get the chunk stuff now and place it in the FRONT of the queue */
9101 sctp_alloc_a_chunk(stcb, chk);
9104 sctp_m_freem(cookie);
9107 chk->copy_by_ref = 0;
9108 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9109 chk->rec.chunk_id.can_take_data = 0;
9110 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9111 chk->send_size = plen;
9112 chk->sent = SCTP_DATAGRAM_UNSENT;
9114 chk->asoc = &stcb->asoc;
9117 atomic_add_int(&chk->whoTo->ref_count, 1);
9118 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9119 chk->asoc->ctrl_queue_cnt++;
9124 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9128 struct sctp_nets *net)
9131 * take a HB request and make it into a HB ack and send it.
9133 struct mbuf *outchain;
9134 struct sctp_chunkhdr *chdr;
9135 struct sctp_tmit_chunk *chk;
9139 /* must have a net pointer */
9142 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9143 if (outchain == NULL) {
9144 /* gak out of memory */
9147 #ifdef SCTP_MBUF_LOGGING
9148 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9149 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9152 chdr = mtod(outchain, struct sctp_chunkhdr *);
9153 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9154 chdr->chunk_flags = 0;
9155 if (chk_length % 4) {
9157 uint32_t cpthis = 0;
9160 padlen = 4 - (chk_length % 4);
9161 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9163 sctp_alloc_a_chunk(stcb, chk);
9166 sctp_m_freem(outchain);
9169 chk->copy_by_ref = 0;
9170 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9171 chk->rec.chunk_id.can_take_data = 1;
9173 chk->send_size = chk_length;
9174 chk->sent = SCTP_DATAGRAM_UNSENT;
9176 chk->asoc = &stcb->asoc;
9177 chk->data = outchain;
9179 atomic_add_int(&chk->whoTo->ref_count, 1);
9180 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9181 chk->asoc->ctrl_queue_cnt++;
9185 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9187 /* formulate and queue a cookie-ack back to sender */
9188 struct mbuf *cookie_ack;
9189 struct sctp_chunkhdr *hdr;
9190 struct sctp_tmit_chunk *chk;
9192 SCTP_TCB_LOCK_ASSERT(stcb);
9194 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9195 if (cookie_ack == NULL) {
9199 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9200 sctp_alloc_a_chunk(stcb, chk);
9203 sctp_m_freem(cookie_ack);
9206 chk->copy_by_ref = 0;
9207 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9208 chk->rec.chunk_id.can_take_data = 1;
9210 chk->send_size = sizeof(struct sctp_chunkhdr);
9211 chk->sent = SCTP_DATAGRAM_UNSENT;
9213 chk->asoc = &stcb->asoc;
9214 chk->data = cookie_ack;
9215 if (chk->asoc->last_control_chunk_from != NULL) {
9216 chk->whoTo = chk->asoc->last_control_chunk_from;
9217 atomic_add_int(&chk->whoTo->ref_count, 1);
9221 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9222 hdr->chunk_type = SCTP_COOKIE_ACK;
9223 hdr->chunk_flags = 0;
9224 hdr->chunk_length = htons(chk->send_size);
9225 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9226 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9227 chk->asoc->ctrl_queue_cnt++;
9233 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9235 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9236 struct mbuf *m_shutdown_ack;
9237 struct sctp_shutdown_ack_chunk *ack_cp;
9238 struct sctp_tmit_chunk *chk;
9240 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9241 if (m_shutdown_ack == NULL) {
9245 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9246 sctp_alloc_a_chunk(stcb, chk);
9249 sctp_m_freem(m_shutdown_ack);
9252 chk->copy_by_ref = 0;
9253 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9254 chk->rec.chunk_id.can_take_data = 1;
9256 chk->send_size = sizeof(struct sctp_chunkhdr);
9257 chk->sent = SCTP_DATAGRAM_UNSENT;
9260 chk->asoc = &stcb->asoc;
9261 chk->data = m_shutdown_ack;
9264 atomic_add_int(&chk->whoTo->ref_count, 1);
9266 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9267 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9268 ack_cp->ch.chunk_flags = 0;
9269 ack_cp->ch.chunk_length = htons(chk->send_size);
9270 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9271 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9272 chk->asoc->ctrl_queue_cnt++;
9277 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9279 /* formulate and queue a SHUTDOWN to the sender */
9280 struct mbuf *m_shutdown;
9281 struct sctp_shutdown_chunk *shutdown_cp;
9282 struct sctp_tmit_chunk *chk;
9284 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9285 if (m_shutdown == NULL) {
9289 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9290 sctp_alloc_a_chunk(stcb, chk);
9293 sctp_m_freem(m_shutdown);
9296 chk->copy_by_ref = 0;
9297 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9298 chk->rec.chunk_id.can_take_data = 1;
9300 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9301 chk->sent = SCTP_DATAGRAM_UNSENT;
9304 chk->asoc = &stcb->asoc;
9305 chk->data = m_shutdown;
9308 atomic_add_int(&chk->whoTo->ref_count, 1);
9310 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9311 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9312 shutdown_cp->ch.chunk_flags = 0;
9313 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9314 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9315 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9316 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9317 chk->asoc->ctrl_queue_cnt++;
9322 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9325 * formulate and queue an ASCONF to the peer. ASCONF parameters
9326 * should be queued on the assoc queue.
9328 struct sctp_tmit_chunk *chk;
9329 struct mbuf *m_asconf;
9332 SCTP_TCB_LOCK_ASSERT(stcb);
9334 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9335 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9336 /* can't send a new one if there is one in flight already */
9339 /* compose an ASCONF chunk, maximum length is PMTU */
9340 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9341 if (m_asconf == NULL) {
9344 sctp_alloc_a_chunk(stcb, chk);
9347 sctp_m_freem(m_asconf);
9350 chk->copy_by_ref = 0;
9351 chk->rec.chunk_id.id = SCTP_ASCONF;
9352 chk->rec.chunk_id.can_take_data = 0;
9353 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9354 chk->data = m_asconf;
9355 chk->send_size = len;
9356 chk->sent = SCTP_DATAGRAM_UNSENT;
9358 chk->asoc = &stcb->asoc;
9361 atomic_add_int(&chk->whoTo->ref_count, 1);
9363 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9364 chk->asoc->ctrl_queue_cnt++;
9369 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9372 * formulate and queue a asconf-ack back to sender. the asconf-ack
9373 * must be stored in the tcb.
9375 struct sctp_tmit_chunk *chk;
9376 struct sctp_asconf_ack *ack, *latest_ack;
9378 struct sctp_nets *net = NULL;
9380 SCTP_TCB_LOCK_ASSERT(stcb);
9381 /* Get the latest ASCONF-ACK */
9382 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9383 if (latest_ack == NULL) {
9386 if (latest_ack->last_sent_to != NULL &&
9387 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9388 /* we're doing a retransmission */
9389 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9392 if (stcb->asoc.last_control_chunk_from == NULL) {
9393 if (stcb->asoc.alternate) {
9394 net = stcb->asoc.alternate;
9396 net = stcb->asoc.primary_destination;
9399 net = stcb->asoc.last_control_chunk_from;
9404 if (stcb->asoc.last_control_chunk_from == NULL) {
9405 if (stcb->asoc.alternate) {
9406 net = stcb->asoc.alternate;
9408 net = stcb->asoc.primary_destination;
9411 net = stcb->asoc.last_control_chunk_from;
9414 latest_ack->last_sent_to = net;
9416 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9417 if (ack->data == NULL) {
9420 /* copy the asconf_ack */
9421 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9422 if (m_ack == NULL) {
9423 /* couldn't copy it */
9426 #ifdef SCTP_MBUF_LOGGING
9427 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9428 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9432 sctp_alloc_a_chunk(stcb, chk);
9436 sctp_m_freem(m_ack);
9439 chk->copy_by_ref = 0;
9440 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9441 chk->rec.chunk_id.can_take_data = 1;
9442 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9445 atomic_add_int(&chk->whoTo->ref_count, 1);
9448 chk->send_size = ack->len;
9449 chk->sent = SCTP_DATAGRAM_UNSENT;
9451 chk->asoc = &stcb->asoc;
9453 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9454 chk->asoc->ctrl_queue_cnt++;
9461 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9462 struct sctp_tcb *stcb,
9463 struct sctp_association *asoc,
9464 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9465 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9471 * send out one MTU of retransmission. If fast_retransmit is
9472 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9473 * rwnd. For a Cookie or Asconf in the control chunk queue we
9474 * retransmit them by themselves.
9476 * For data chunks we will pick out the lowest TSN's in the sent_queue
9477 * marked for resend and bundle them all together (up to a MTU of
9478 * destination). The address to send to should have been
9479 * selected/changed where the retransmission was marked (i.e. in FR
9480 * or t3-timeout routines).
9482 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9483 struct sctp_tmit_chunk *chk, *fwd;
9484 struct mbuf *m, *endofchain;
9485 struct sctp_nets *net = NULL;
9486 uint32_t tsns_sent = 0;
9487 int no_fragmentflg, bundle_at, cnt_thru;
9489 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9490 struct sctp_auth_chunk *auth = NULL;
9491 uint32_t auth_offset = 0;
9492 uint16_t auth_keyid;
9493 int override_ok = 1;
9494 int data_auth_reqd = 0;
9497 SCTP_TCB_LOCK_ASSERT(stcb);
9498 tmr_started = ctl_cnt = bundle_at = error = 0;
9503 endofchain = m = NULL;
9504 auth_keyid = stcb->asoc.authinfo.active_keyid;
9505 #ifdef SCTP_AUDITING_ENABLED
9506 sctp_audit_log(0xC3, 1);
9508 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9509 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9510 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9511 asoc->sent_queue_retran_cnt);
9512 asoc->sent_queue_cnt = 0;
9513 asoc->sent_queue_cnt_removeable = 0;
9514 /* send back 0/0 so we enter normal transmission */
9518 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9519 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9520 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9521 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9522 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9525 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9526 if (chk != asoc->str_reset) {
9528 * not eligible for retran if its
9535 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9539 * Add an AUTH chunk, if chunk requires it save the
9540 * offset into the chain for AUTH
9542 if ((auth == NULL) &&
9543 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9544 stcb->asoc.peer_auth_chunks))) {
9545 m = sctp_add_auth_chunk(m, &endofchain,
9546 &auth, &auth_offset,
9548 chk->rec.chunk_id.id);
9549 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9551 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9557 /* do we have control chunks to retransmit? */
9559 /* Start a timer no matter if we succeed or fail */
9560 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9561 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9562 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9563 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9564 chk->snd_count++; /* update our count */
9565 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9566 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9567 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9568 no_fragmentflg, 0, 0,
9569 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9570 chk->whoTo->port, NULL,
9573 SCTP_STAT_INCR(sctps_lowlevelerr);
9580 * We don't want to mark the net->sent time here since this
9581 * we use this for HB and retrans cannot measure RTT
9583 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9585 chk->sent = SCTP_DATAGRAM_SENT;
9586 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9590 /* Clean up the fwd-tsn list */
9591 sctp_clean_up_ctl(stcb, asoc, so_locked);
9596 * Ok, it is just data retransmission we need to do or that and a
9597 * fwd-tsn with it all.
9599 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9600 return (SCTP_RETRAN_DONE);
9602 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9603 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9604 /* not yet open, resend the cookie and that is it */
9607 #ifdef SCTP_AUDITING_ENABLED
9608 sctp_auditing(20, inp, stcb, NULL);
9610 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9611 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9612 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9613 /* No, not sent to this net or not ready for rtx */
9616 if (chk->data == NULL) {
9617 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9618 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9621 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9622 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9623 struct mbuf *op_err;
9624 char msg[SCTP_DIAG_INFO_LEN];
9626 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9627 chk->rec.data.TSN_seq, chk->snd_count);
9628 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9630 atomic_add_int(&stcb->asoc.refcnt, 1);
9631 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9633 SCTP_TCB_LOCK(stcb);
9634 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9635 return (SCTP_RETRAN_EXIT);
9637 /* pick up the net */
9639 switch (net->ro._l_addr.sa.sa_family) {
9642 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9647 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9656 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9657 /* No room in peers rwnd */
9660 tsn = asoc->last_acked_seq + 1;
9661 if (tsn == chk->rec.data.TSN_seq) {
9663 * we make a special exception for this
9664 * case. The peer has no rwnd but is missing
9665 * the lowest chunk.. which is probably what
9666 * is holding up the rwnd.
9668 goto one_chunk_around;
9673 if (asoc->peers_rwnd < mtu) {
9675 if ((asoc->peers_rwnd == 0) &&
9676 (asoc->total_flight == 0)) {
9677 chk->window_probe = 1;
9678 chk->whoTo->window_probe = 1;
9681 #ifdef SCTP_AUDITING_ENABLED
9682 sctp_audit_log(0xC3, 2);
9686 net->fast_retran_ip = 0;
9687 if (chk->rec.data.doing_fast_retransmit == 0) {
9689 * if no FR in progress skip destination that have
9690 * flight_size > cwnd.
9692 if (net->flight_size >= net->cwnd) {
9697 * Mark the destination net to have FR recovery
9701 net->fast_retran_ip = 1;
9705 * if no AUTH is yet included and this chunk requires it,
9706 * make sure to account for it. We don't apply the size
9707 * until the AUTH chunk is actually added below in case
9708 * there is no room for this chunk.
9710 if (data_auth_reqd && (auth == NULL)) {
9711 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9715 if ((chk->send_size <= (mtu - dmtu)) ||
9716 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9717 /* ok we will add this one */
9718 if (data_auth_reqd) {
9720 m = sctp_add_auth_chunk(m,
9726 auth_keyid = chk->auth_keyid;
9728 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9729 } else if (override_ok) {
9730 auth_keyid = chk->auth_keyid;
9732 } else if (chk->auth_keyid != auth_keyid) {
9733 /* different keyid, so done bundling */
9737 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9739 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9742 /* Do clear IP_DF ? */
9743 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9746 /* upate our MTU size */
9747 if (mtu > (chk->send_size + dmtu))
9748 mtu -= (chk->send_size + dmtu);
9751 data_list[bundle_at++] = chk;
9752 if (one_chunk && (asoc->total_flight <= 0)) {
9753 SCTP_STAT_INCR(sctps_windowprobed);
9756 if (one_chunk == 0) {
9758 * now are there anymore forward from chk to pick
9761 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9762 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9763 /* Nope, not for retran */
9766 if (fwd->whoTo != net) {
9767 /* Nope, not the net in question */
9770 if (data_auth_reqd && (auth == NULL)) {
9771 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9774 if (fwd->send_size <= (mtu - dmtu)) {
9775 if (data_auth_reqd) {
9777 m = sctp_add_auth_chunk(m,
9783 auth_keyid = fwd->auth_keyid;
9785 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9786 } else if (override_ok) {
9787 auth_keyid = fwd->auth_keyid;
9789 } else if (fwd->auth_keyid != auth_keyid) {
9797 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9799 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9802 /* Do clear IP_DF ? */
9803 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9806 /* upate our MTU size */
9807 if (mtu > (fwd->send_size + dmtu))
9808 mtu -= (fwd->send_size + dmtu);
9811 data_list[bundle_at++] = fwd;
9812 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9816 /* can't fit so we are done */
9821 /* Is there something to send for this destination? */
9824 * No matter if we fail/or succeed we should start a
9825 * timer. A failure is like a lost IP packet :-)
9827 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9829 * no timer running on this destination
9832 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9835 /* Now lets send it, if there is anything to send :> */
9836 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9837 (struct sockaddr *)&net->ro._l_addr, m,
9838 auth_offset, auth, auth_keyid,
9839 no_fragmentflg, 0, 0,
9840 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9844 /* error, we could not output */
9845 SCTP_STAT_INCR(sctps_lowlevelerr);
9853 * We don't want to mark the net->sent time here
9854 * since this we use this for HB and retrans cannot
9857 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9859 /* For auto-close */
9861 if (*now_filled == 0) {
9862 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9863 *now = asoc->time_last_sent;
9866 asoc->time_last_sent = *now;
9868 *cnt_out += bundle_at;
9869 #ifdef SCTP_AUDITING_ENABLED
9870 sctp_audit_log(0xC4, bundle_at);
9873 tsns_sent = data_list[0]->rec.data.TSN_seq;
9875 for (i = 0; i < bundle_at; i++) {
9876 SCTP_STAT_INCR(sctps_sendretransdata);
9877 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9879 * When we have a revoked data, and we
9880 * retransmit it, then we clear the revoked
9881 * flag since this flag dictates if we
9882 * subtracted from the fs
9884 if (data_list[i]->rec.data.chunk_was_revoked) {
9885 /* Deflate the cwnd */
9886 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9887 data_list[i]->rec.data.chunk_was_revoked = 0;
9889 data_list[i]->snd_count++;
9890 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9891 /* record the time */
9892 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9893 if (data_list[i]->book_size_scale) {
9895 * need to double the book size on
9898 data_list[i]->book_size_scale = 0;
9900 * Since we double the booksize, we
9901 * must also double the output queue
9902 * size, since this get shrunk when
9903 * we free by this amount.
9905 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9906 data_list[i]->book_size *= 2;
9910 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9911 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9912 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9914 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9915 (uint32_t) (data_list[i]->send_size +
9916 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9918 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9919 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9920 data_list[i]->whoTo->flight_size,
9921 data_list[i]->book_size,
9922 (uint32_t) (uintptr_t) data_list[i]->whoTo,
9923 data_list[i]->rec.data.TSN_seq);
9925 sctp_flight_size_increase(data_list[i]);
9926 sctp_total_flight_increase(stcb, data_list[i]);
9927 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9928 /* SWS sender side engages */
9929 asoc->peers_rwnd = 0;
9932 (data_list[i]->rec.data.doing_fast_retransmit)) {
9933 SCTP_STAT_INCR(sctps_sendfastretrans);
9934 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9935 (tmr_started == 0)) {
9937 * ok we just fast-retrans'd
9938 * the lowest TSN, i.e the
9939 * first on the list. In
9940 * this case we want to give
9941 * some more time to get a
9942 * SACK back without a
9945 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9946 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9947 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9951 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9952 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9954 #ifdef SCTP_AUDITING_ENABLED
9955 sctp_auditing(21, inp, stcb, NULL);
9961 if (asoc->sent_queue_retran_cnt <= 0) {
9962 /* all done we have no more to retran */
9963 asoc->sent_queue_retran_cnt = 0;
9967 /* No more room in rwnd */
9970 /* stop the for loop here. we sent out a packet */
9977 sctp_timer_validation(struct sctp_inpcb *inp,
9978 struct sctp_tcb *stcb,
9979 struct sctp_association *asoc)
9981 struct sctp_nets *net;
9983 /* Validate that a timer is running somewhere */
9984 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9985 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9986 /* Here is a timer */
9990 SCTP_TCB_LOCK_ASSERT(stcb);
9991 /* Gak, we did not have a timer somewhere */
9992 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9993 if (asoc->alternate) {
9994 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9996 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
10002 sctp_chunk_output(struct sctp_inpcb *inp,
10003 struct sctp_tcb *stcb,
10006 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10012 * Ok this is the generic chunk service queue. we must do the
10014 * - See if there are retransmits pending, if so we must
10016 * - Service the stream queue that is next, moving any
10017 * message (note I must get a complete message i.e.
10018 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
10020 * - Check to see if the cwnd/rwnd allows any output, if so we
10021 * go ahead and fomulate and send the low level chunks. Making sure
10022 * to combine any control in the control chunk queue also.
10024 struct sctp_association *asoc;
10025 struct sctp_nets *net;
10026 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
10027 unsigned int burst_cnt = 0;
10028 struct timeval now;
10029 int now_filled = 0;
10031 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10034 unsigned int tot_frs = 0;
10036 asoc = &stcb->asoc;
10038 /* The Nagle algorithm is only applied when handling a send call. */
10039 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10040 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10048 SCTP_TCB_LOCK_ASSERT(stcb);
10050 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10052 if ((un_sent <= 0) &&
10053 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10054 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10055 (asoc->sent_queue_retran_cnt == 0) &&
10056 (asoc->trigger_reset == 0)) {
10057 /* Nothing to do unless there is something to be sent left */
10061 * Do we have something to send, data or control AND a sack timer
10062 * running, if so piggy-back the sack.
10064 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10065 sctp_send_sack(stcb, so_locked);
10066 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10068 while (asoc->sent_queue_retran_cnt) {
10070 * Ok, it is retransmission time only, we send out only ONE
10071 * packet with a single call off to the retran code.
10073 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10075 * Special hook for handling cookiess discarded
10076 * by peer that carried data. Send cookie-ack only
10077 * and then the next call with get the retran's.
10079 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10081 &now, &now_filled, frag_point, so_locked);
10083 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10084 /* if its not from a HB then do it */
10086 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10092 * its from any other place, we don't allow retran
10093 * output (only control)
10098 /* Can't send anymore */
10100 * now lets push out control by calling med-level
10101 * output once. this assures that we WILL send HB's
10104 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10106 &now, &now_filled, frag_point, so_locked);
10107 #ifdef SCTP_AUDITING_ENABLED
10108 sctp_auditing(8, inp, stcb, NULL);
10110 sctp_timer_validation(inp, stcb, asoc);
10115 * The count was off.. retran is not happening so do
10116 * the normal retransmission.
10118 #ifdef SCTP_AUDITING_ENABLED
10119 sctp_auditing(9, inp, stcb, NULL);
10121 if (ret == SCTP_RETRAN_EXIT) {
10126 if (from_where == SCTP_OUTPUT_FROM_T3) {
10127 /* Only one transmission allowed out of a timeout */
10128 #ifdef SCTP_AUDITING_ENABLED
10129 sctp_auditing(10, inp, stcb, NULL);
10131 /* Push out any control */
10132 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10133 &now, &now_filled, frag_point, so_locked);
10136 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10137 /* Hit FR burst limit */
10140 if ((num_out == 0) && (ret == 0)) {
10141 /* No more retrans to send */
10145 #ifdef SCTP_AUDITING_ENABLED
10146 sctp_auditing(12, inp, stcb, NULL);
10148 /* Check for bad destinations, if they exist move chunks around. */
10149 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10150 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10152 * if possible move things off of this address we
10153 * still may send below due to the dormant state but
10154 * we try to find an alternate address to send to
10155 * and if we have one we move all queued data on the
10156 * out wheel to this alternate address.
10158 if (net->ref_count > 1)
10159 sctp_move_chunks_from_net(stcb, net);
10162 * if ((asoc->sat_network) || (net->addr_is_local))
10163 * { burst_limit = asoc->max_burst *
10164 * SCTP_SAT_NETWORK_BURST_INCR; }
10166 if (asoc->max_burst > 0) {
10167 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10168 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10170 * JRS - Use the congestion
10171 * control given in the
10172 * congestion control module
10174 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10175 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10176 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10178 SCTP_STAT_INCR(sctps_maxburstqueued);
10180 net->fast_retran_ip = 0;
10182 if (net->flight_size == 0) {
10184 * Should be decaying the
10196 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10197 &reason_code, 0, from_where,
10198 &now, &now_filled, frag_point, so_locked);
10200 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10201 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10202 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10204 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10205 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10206 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10210 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10212 tot_out += num_out;
10214 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10215 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10216 if (num_out == 0) {
10217 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10222 * When the Nagle algorithm is used, look at how
10223 * much is unsent, then if its smaller than an MTU
10224 * and we have data in flight we stop, except if we
10225 * are handling a fragmented user message.
10227 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10228 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10229 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10230 (stcb->asoc.total_flight > 0) &&
10231 ((stcb->asoc.locked_on_sending == NULL) ||
10232 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10236 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10237 TAILQ_EMPTY(&asoc->send_queue) &&
10238 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10239 /* Nothing left to send */
10242 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10243 /* Nothing left to send */
10246 } while (num_out &&
10247 ((asoc->max_burst == 0) ||
10248 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10249 (burst_cnt < asoc->max_burst)));
10251 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10252 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10253 SCTP_STAT_INCR(sctps_maxburstqueued);
10254 asoc->burst_limit_applied = 1;
10255 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10256 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10259 asoc->burst_limit_applied = 0;
10262 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10263 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10265 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10269 * Now we need to clean up the control chunk chain if a ECNE is on
10270 * it. It must be marked as UNSENT again so next call will continue
10271 * to send it until such time that we get a CWR, to remove it.
10273 if (stcb->asoc.ecn_echo_cnt_onq)
10274 sctp_fix_ecn_echo(asoc);
10276 if (stcb->asoc.trigger_reset) {
10277 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10287 struct sctp_inpcb *inp,
10289 struct sockaddr *addr,
10290 struct mbuf *control,
10295 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10298 if (inp->sctp_socket == NULL) {
10299 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10302 return (sctp_sosend(inp->sctp_socket,
10304 (struct uio *)NULL,
10312 send_forward_tsn(struct sctp_tcb *stcb,
10313 struct sctp_association *asoc)
10315 struct sctp_tmit_chunk *chk;
10316 struct sctp_forward_tsn_chunk *fwdtsn;
10317 uint32_t advance_peer_ack_point;
10320 if (asoc->idata_supported) {
10325 SCTP_TCB_LOCK_ASSERT(stcb);
10326 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10327 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10328 /* mark it to unsent */
10329 chk->sent = SCTP_DATAGRAM_UNSENT;
10330 chk->snd_count = 0;
10331 /* Do we correct its output location? */
10333 sctp_free_remote_addr(chk->whoTo);
10336 goto sctp_fill_in_rest;
10339 /* Ok if we reach here we must build one */
10340 sctp_alloc_a_chunk(stcb, chk);
10344 asoc->fwd_tsn_cnt++;
10345 chk->copy_by_ref = 0;
10347 * We don't do the old thing here since this is used not for on-wire
10348 * but to tell if we are sending a fwd-tsn by the stack during
10349 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10351 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10352 chk->rec.chunk_id.can_take_data = 0;
10356 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10357 if (chk->data == NULL) {
10358 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10361 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10362 chk->sent = SCTP_DATAGRAM_UNSENT;
10363 chk->snd_count = 0;
10364 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10365 asoc->ctrl_queue_cnt++;
10368 * Here we go through and fill out the part that deals with
10369 * stream/seq of the ones we skip.
10371 SCTP_BUF_LEN(chk->data) = 0;
10373 struct sctp_tmit_chunk *at, *tp1, *last;
10374 struct sctp_strseq *strseq;
10375 struct sctp_strseq_mid *strseq_m;
10376 unsigned int cnt_of_space, i, ovh;
10377 unsigned int space_needed;
10378 unsigned int cnt_of_skipped = 0;
10380 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10381 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10382 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10383 /* no more to look at */
10386 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10387 /* We don't report these */
10393 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10394 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10396 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10397 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10399 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10401 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10402 ovh = SCTP_MIN_OVERHEAD;
10404 ovh = SCTP_MIN_V4_OVERHEAD;
10406 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10407 /* trim to a mtu size */
10408 cnt_of_space = asoc->smallest_mtu - ovh;
10410 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10411 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10412 0xff, 0, cnt_of_skipped,
10413 asoc->advanced_peer_ack_point);
10416 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10417 if (cnt_of_space < space_needed) {
10419 * ok we must trim down the chunk by lowering the
10420 * advance peer ack point.
10422 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10423 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10424 0xff, 0xff, cnt_of_space,
10428 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10429 cnt_of_skipped /= sizeof(struct sctp_strseq);
10431 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10432 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10435 * Go through and find the TSN that will be the one
10438 at = TAILQ_FIRST(&asoc->sent_queue);
10440 for (i = 0; i < cnt_of_skipped; i++) {
10441 tp1 = TAILQ_NEXT(at, sctp_next);
10448 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10449 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10450 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10451 asoc->advanced_peer_ack_point);
10455 * last now points to last one I can report, update
10459 advance_peer_ack_point = last->rec.data.TSN_seq;
10461 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10462 cnt_of_skipped * sizeof(struct sctp_strseq);
10464 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10465 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10468 chk->send_size = space_needed;
10469 /* Setup the chunk */
10470 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10471 fwdtsn->ch.chunk_length = htons(chk->send_size);
10472 fwdtsn->ch.chunk_flags = 0;
10474 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10476 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10478 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10479 SCTP_BUF_LEN(chk->data) = chk->send_size;
10482 * Move pointer to after the fwdtsn and transfer to the
10486 strseq = (struct sctp_strseq *)fwdtsn;
10488 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10491 * Now populate the strseq list. This is done blindly
10492 * without pulling out duplicate stream info. This is
10493 * inefficent but won't harm the process since the peer will
10494 * look at these in sequence and will thus release anything.
10495 * It could mean we exceed the PMTU and chop off some that
10496 * we could have included.. but this is unlikely (aka 1432/4
10497 * would mean 300+ stream seq's would have to be reported in
10498 * one FWD-TSN. With a bit of work we can later FIX this to
10499 * optimize and pull out duplcates.. but it does add more
10500 * overhead. So for now... not!
10502 at = TAILQ_FIRST(&asoc->sent_queue);
10503 for (i = 0; i < cnt_of_skipped; i++) {
10504 tp1 = TAILQ_NEXT(at, sctp_next);
10507 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10508 /* We don't report these */
10513 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10514 at->rec.data.fwd_tsn_cnt = 0;
10517 strseq->stream = ntohs(at->rec.data.stream_number);
10518 strseq->sequence = ntohs(at->rec.data.stream_seq);
10521 strseq_m->stream = ntohs(at->rec.data.stream_number);
10522 strseq_m->reserved = ntohs(0);
10523 strseq_m->msg_id = ntohl(at->rec.data.stream_seq);
10533 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10534 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10540 * Queue up a SACK or NR-SACK in the control queue.
10541 * We must first check to see if a SACK or NR-SACK is
10542 * somehow on the control queue.
10543 * If so, we will take and and remove the old one.
10545 struct sctp_association *asoc;
10546 struct sctp_tmit_chunk *chk, *a_chk;
10547 struct sctp_sack_chunk *sack;
10548 struct sctp_nr_sack_chunk *nr_sack;
10549 struct sctp_gap_ack_block *gap_descriptor;
10550 const struct sack_track *selector;
10555 int limit_reached = 0;
10556 unsigned int i, siz, j;
10557 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10560 uint32_t highest_tsn;
10565 if (stcb->asoc.nrsack_supported == 1) {
10566 type = SCTP_NR_SELECTIVE_ACK;
10568 type = SCTP_SELECTIVE_ACK;
10571 asoc = &stcb->asoc;
10572 SCTP_TCB_LOCK_ASSERT(stcb);
10573 if (asoc->last_data_chunk_from == NULL) {
10574 /* Hmm we never received anything */
10577 sctp_slide_mapping_arrays(stcb);
10578 sctp_set_rwnd(stcb, asoc);
10579 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10580 if (chk->rec.chunk_id.id == type) {
10581 /* Hmm, found a sack already on queue, remove it */
10582 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10583 asoc->ctrl_queue_cnt--;
10586 sctp_m_freem(a_chk->data);
10587 a_chk->data = NULL;
10589 if (a_chk->whoTo) {
10590 sctp_free_remote_addr(a_chk->whoTo);
10591 a_chk->whoTo = NULL;
10596 if (a_chk == NULL) {
10597 sctp_alloc_a_chunk(stcb, a_chk);
10598 if (a_chk == NULL) {
10599 /* No memory so we drop the idea, and set a timer */
10600 if (stcb->asoc.delayed_ack) {
10601 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10602 stcb->sctp_ep, stcb, NULL,
10603 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10604 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10605 stcb->sctp_ep, stcb, NULL);
10607 stcb->asoc.send_sack = 1;
10611 a_chk->copy_by_ref = 0;
10612 a_chk->rec.chunk_id.id = type;
10613 a_chk->rec.chunk_id.can_take_data = 1;
10615 /* Clear our pkt counts */
10616 asoc->data_pkts_seen = 0;
10619 a_chk->asoc = asoc;
10620 a_chk->snd_count = 0;
10621 a_chk->send_size = 0; /* fill in later */
10622 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10623 a_chk->whoTo = NULL;
10625 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10627 * Ok, the destination for the SACK is unreachable, lets see if
10628 * we can select an alternate to asoc->last_data_chunk_from
10630 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10631 if (a_chk->whoTo == NULL) {
10632 /* Nope, no alternate */
10633 a_chk->whoTo = asoc->last_data_chunk_from;
10636 a_chk->whoTo = asoc->last_data_chunk_from;
10638 if (a_chk->whoTo) {
10639 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10641 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10642 highest_tsn = asoc->highest_tsn_inside_map;
10644 highest_tsn = asoc->highest_tsn_inside_nr_map;
10646 if (highest_tsn == asoc->cumulative_tsn) {
10648 if (type == SCTP_SELECTIVE_ACK) {
10649 space_req = sizeof(struct sctp_sack_chunk);
10651 space_req = sizeof(struct sctp_nr_sack_chunk);
10654 /* gaps get a cluster */
10655 space_req = MCLBYTES;
10657 /* Ok now lets formulate a MBUF with our sack */
10658 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10659 if ((a_chk->data == NULL) ||
10660 (a_chk->whoTo == NULL)) {
10661 /* rats, no mbuf memory */
10663 /* was a problem with the destination */
10664 sctp_m_freem(a_chk->data);
10665 a_chk->data = NULL;
10667 sctp_free_a_chunk(stcb, a_chk, so_locked);
10668 /* sa_ignore NO_NULL_CHK */
10669 if (stcb->asoc.delayed_ack) {
10670 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10671 stcb->sctp_ep, stcb, NULL,
10672 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10673 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10674 stcb->sctp_ep, stcb, NULL);
10676 stcb->asoc.send_sack = 1;
10680 /* ok, lets go through and fill it in */
10681 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10682 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10683 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10684 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10686 limit = mtod(a_chk->data, caddr_t);
10691 if ((asoc->sctp_cmt_on_off > 0) &&
10692 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10694 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10695 * received, then set high bit to 1, else 0. Reset
10698 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10699 asoc->cmt_dac_pkts_rcvd = 0;
10701 #ifdef SCTP_ASOCLOG_OF_TSNS
10702 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10703 stcb->asoc.cumack_log_atsnt++;
10704 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10705 stcb->asoc.cumack_log_atsnt = 0;
10708 /* reset the readers interpretation */
10709 stcb->freed_by_sorcv_sincelast = 0;
10711 if (type == SCTP_SELECTIVE_ACK) {
10712 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10714 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10715 if (highest_tsn > asoc->mapping_array_base_tsn) {
10716 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10718 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10722 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10723 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10724 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10725 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10727 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10731 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10734 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10736 if (((type == SCTP_SELECTIVE_ACK) &&
10737 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10738 ((type == SCTP_NR_SELECTIVE_ACK) &&
10739 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10740 /* we have a gap .. maybe */
10741 for (i = 0; i < siz; i++) {
10742 tsn_map = asoc->mapping_array[i];
10743 if (type == SCTP_SELECTIVE_ACK) {
10744 tsn_map |= asoc->nr_mapping_array[i];
10748 * Clear all bits corresponding to TSNs
10749 * smaller or equal to the cumulative TSN.
10751 tsn_map &= (~0U << (1 - offset));
10753 selector = &sack_array[tsn_map];
10754 if (mergeable && selector->right_edge) {
10756 * Backup, left and right edges were ok to
10762 if (selector->num_entries == 0)
10765 for (j = 0; j < selector->num_entries; j++) {
10766 if (mergeable && selector->right_edge) {
10768 * do a merge by NOT setting
10774 * no merge, set the left
10778 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10780 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10783 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10789 if (selector->left_edge) {
10793 if (limit_reached) {
10794 /* Reached the limit stop */
10800 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10801 (limit_reached == 0)) {
10805 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10806 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10808 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10811 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10814 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10816 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10817 /* we have a gap .. maybe */
10818 for (i = 0; i < siz; i++) {
10819 tsn_map = asoc->nr_mapping_array[i];
10822 * Clear all bits corresponding to
10823 * TSNs smaller or equal to the
10826 tsn_map &= (~0U << (1 - offset));
10828 selector = &sack_array[tsn_map];
10829 if (mergeable && selector->right_edge) {
10831 * Backup, left and right edges were
10834 num_nr_gap_blocks--;
10837 if (selector->num_entries == 0)
10840 for (j = 0; j < selector->num_entries; j++) {
10841 if (mergeable && selector->right_edge) {
10843 * do a merge by NOT
10850 * no merge, set the
10854 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10856 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10857 num_nr_gap_blocks++;
10859 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10865 if (selector->left_edge) {
10869 if (limit_reached) {
10870 /* Reached the limit stop */
10877 /* now we must add any dups we are going to report. */
10878 if ((limit_reached == 0) && (asoc->numduptsns)) {
10879 dup = (uint32_t *) gap_descriptor;
10880 for (i = 0; i < asoc->numduptsns; i++) {
10881 *dup = htonl(asoc->dup_tsns[i]);
10884 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10889 asoc->numduptsns = 0;
10892 * now that the chunk is prepared queue it to the control chunk
10895 if (type == SCTP_SELECTIVE_ACK) {
10896 a_chk->send_size = (uint16_t) (sizeof(struct sctp_sack_chunk) +
10897 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10898 num_dups * sizeof(int32_t));
10899 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10900 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10901 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10902 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10903 sack->sack.num_dup_tsns = htons(num_dups);
10904 sack->ch.chunk_type = type;
10905 sack->ch.chunk_flags = flags;
10906 sack->ch.chunk_length = htons(a_chk->send_size);
10908 a_chk->send_size = (uint16_t) (sizeof(struct sctp_nr_sack_chunk) +
10909 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10910 num_dups * sizeof(int32_t));
10911 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10912 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10913 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10914 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10915 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10916 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10917 nr_sack->nr_sack.reserved = 0;
10918 nr_sack->ch.chunk_type = type;
10919 nr_sack->ch.chunk_flags = flags;
10920 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10922 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10923 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10924 asoc->ctrl_queue_cnt++;
10925 asoc->send_sack = 0;
10926 SCTP_STAT_INCR(sctps_sendsacks);
10931 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10932 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10937 struct mbuf *m_abort, *m, *m_last;
10938 struct mbuf *m_out, *m_end = NULL;
10939 struct sctp_abort_chunk *abort;
10940 struct sctp_auth_chunk *auth = NULL;
10941 struct sctp_nets *net;
10943 uint32_t auth_offset = 0;
10944 uint16_t cause_len, chunk_len, padding_len;
10946 SCTP_TCB_LOCK_ASSERT(stcb);
10948 * Add an AUTH chunk, if chunk requires it and save the offset into
10949 * the chain for AUTH
10951 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10952 stcb->asoc.peer_auth_chunks)) {
10953 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10954 stcb, SCTP_ABORT_ASSOCIATION);
10955 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10959 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10960 if (m_abort == NULL) {
10962 sctp_m_freem(m_out);
10965 sctp_m_freem(operr);
10969 /* link in any error */
10970 SCTP_BUF_NEXT(m_abort) = operr;
10973 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10974 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10975 if (SCTP_BUF_NEXT(m) == NULL) {
10979 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10980 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10981 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10982 if (m_out == NULL) {
10983 /* NO Auth chunk prepended, so reserve space in front */
10984 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10987 /* Put AUTH chunk at the front of the chain */
10988 SCTP_BUF_NEXT(m_end) = m_abort;
10990 if (stcb->asoc.alternate) {
10991 net = stcb->asoc.alternate;
10993 net = stcb->asoc.primary_destination;
10995 /* Fill in the ABORT chunk header. */
10996 abort = mtod(m_abort, struct sctp_abort_chunk *);
10997 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10998 if (stcb->asoc.peer_vtag == 0) {
10999 /* This happens iff the assoc is in COOKIE-WAIT state. */
11000 vtag = stcb->asoc.my_vtag;
11001 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
11003 vtag = stcb->asoc.peer_vtag;
11004 abort->ch.chunk_flags = 0;
11006 abort->ch.chunk_length = htons(chunk_len);
11007 /* Add padding, if necessary. */
11008 if (padding_len > 0) {
11009 if ((m_last == NULL) ||
11010 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
11011 sctp_m_freem(m_out);
11015 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11016 (struct sockaddr *)&net->ro._l_addr,
11017 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
11018 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
11019 stcb->asoc.primary_destination->port, NULL,
11022 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11026 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11027 struct sctp_nets *net,
11030 /* formulate and SEND a SHUTDOWN-COMPLETE */
11031 struct mbuf *m_shutdown_comp;
11032 struct sctp_shutdown_complete_chunk *shutdown_complete;
11036 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11037 if (m_shutdown_comp == NULL) {
11041 if (reflect_vtag) {
11042 flags = SCTP_HAD_NO_TCB;
11043 vtag = stcb->asoc.my_vtag;
11046 vtag = stcb->asoc.peer_vtag;
11048 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11049 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11050 shutdown_complete->ch.chunk_flags = flags;
11051 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11052 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11053 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11054 (struct sockaddr *)&net->ro._l_addr,
11055 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11056 stcb->sctp_ep->sctp_lport, stcb->rport,
11060 SCTP_SO_NOT_LOCKED);
11061 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11066 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11067 struct sctphdr *sh, uint32_t vtag,
11068 uint8_t type, struct mbuf *cause,
11069 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11070 uint32_t vrf_id, uint16_t port)
11072 struct mbuf *o_pak;
11074 struct sctphdr *shout;
11075 struct sctp_chunkhdr *ch;
11077 #if defined(INET) || defined(INET6)
11078 struct udphdr *udp;
11082 int len, cause_len, padding_len;
11085 struct sockaddr_in *src_sin, *dst_sin;
11090 struct sockaddr_in6 *src_sin6, *dst_sin6;
11091 struct ip6_hdr *ip6;
11095 /* Compute the length of the cause and add final padding. */
11097 if (cause != NULL) {
11098 struct mbuf *m_at, *m_last = NULL;
11100 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11101 if (SCTP_BUF_NEXT(m_at) == NULL)
11103 cause_len += SCTP_BUF_LEN(m_at);
11105 padding_len = cause_len % 4;
11106 if (padding_len != 0) {
11107 padding_len = 4 - padding_len;
11109 if (padding_len != 0) {
11110 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11111 sctp_m_freem(cause);
11118 /* Get an mbuf for the header. */
11119 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11120 switch (dst->sa_family) {
11123 len += sizeof(struct ip);
11128 len += sizeof(struct ip6_hdr);
11134 #if defined(INET) || defined(INET6)
11136 len += sizeof(struct udphdr);
11139 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11140 if (mout == NULL) {
11142 sctp_m_freem(cause);
11146 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11147 SCTP_BUF_LEN(mout) = len;
11148 SCTP_BUF_NEXT(mout) = cause;
11149 M_SETFIB(mout, fibnum);
11150 mout->m_pkthdr.flowid = mflowid;
11151 M_HASHTYPE_SET(mout, mflowtype);
11158 switch (dst->sa_family) {
11161 src_sin = (struct sockaddr_in *)src;
11162 dst_sin = (struct sockaddr_in *)dst;
11163 ip = mtod(mout, struct ip *);
11164 ip->ip_v = IPVERSION;
11165 ip->ip_hl = (sizeof(struct ip) >> 2);
11169 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11171 ip->ip_p = IPPROTO_UDP;
11173 ip->ip_p = IPPROTO_SCTP;
11175 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11176 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11178 len = sizeof(struct ip);
11179 shout = (struct sctphdr *)((caddr_t)ip + len);
11184 src_sin6 = (struct sockaddr_in6 *)src;
11185 dst_sin6 = (struct sockaddr_in6 *)dst;
11186 ip6 = mtod(mout, struct ip6_hdr *);
11187 ip6->ip6_flow = htonl(0x60000000);
11188 if (V_ip6_auto_flowlabel) {
11189 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11191 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11193 ip6->ip6_nxt = IPPROTO_UDP;
11195 ip6->ip6_nxt = IPPROTO_SCTP;
11197 ip6->ip6_src = dst_sin6->sin6_addr;
11198 ip6->ip6_dst = src_sin6->sin6_addr;
11199 len = sizeof(struct ip6_hdr);
11200 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11205 shout = mtod(mout, struct sctphdr *);
11208 #if defined(INET) || defined(INET6)
11210 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11211 sctp_m_freem(mout);
11214 udp = (struct udphdr *)shout;
11215 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11216 udp->uh_dport = port;
11218 udp->uh_ulen = htons((uint16_t) (sizeof(struct udphdr) +
11219 sizeof(struct sctphdr) +
11220 sizeof(struct sctp_chunkhdr) +
11221 cause_len + padding_len));
11222 len += sizeof(struct udphdr);
11223 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11228 shout->src_port = sh->dest_port;
11229 shout->dest_port = sh->src_port;
11230 shout->checksum = 0;
11232 shout->v_tag = htonl(vtag);
11234 shout->v_tag = sh->v_tag;
11236 len += sizeof(struct sctphdr);
11237 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11238 ch->chunk_type = type;
11240 ch->chunk_flags = 0;
11242 ch->chunk_flags = SCTP_HAD_NO_TCB;
11244 ch->chunk_length = htons((uint16_t) (sizeof(struct sctp_chunkhdr) + cause_len));
11245 len += sizeof(struct sctp_chunkhdr);
11246 len += cause_len + padding_len;
11248 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11249 sctp_m_freem(mout);
11252 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11253 switch (dst->sa_family) {
11258 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11263 ip->ip_len = htons(len);
11265 #if defined(SCTP_WITH_NO_CSUM)
11266 SCTP_STAT_INCR(sctps_sendnocrc);
11268 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11269 SCTP_STAT_INCR(sctps_sendswcrc);
11272 SCTP_ENABLE_UDP_CSUM(o_pak);
11275 #if defined(SCTP_WITH_NO_CSUM)
11276 SCTP_STAT_INCR(sctps_sendnocrc);
11278 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11279 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11280 SCTP_STAT_INCR(sctps_sendhwcrc);
11283 #ifdef SCTP_PACKET_LOGGING
11284 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11285 sctp_packet_log(o_pak);
11288 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11293 ip6->ip6_plen = (uint16_t) (len - sizeof(struct ip6_hdr));
11295 #if defined(SCTP_WITH_NO_CSUM)
11296 SCTP_STAT_INCR(sctps_sendnocrc);
11298 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11299 SCTP_STAT_INCR(sctps_sendswcrc);
11301 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11302 udp->uh_sum = 0xffff;
11305 #if defined(SCTP_WITH_NO_CSUM)
11306 SCTP_STAT_INCR(sctps_sendnocrc);
11308 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11309 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11310 SCTP_STAT_INCR(sctps_sendhwcrc);
11313 #ifdef SCTP_PACKET_LOGGING
11314 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11315 sctp_packet_log(o_pak);
11318 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11322 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11324 sctp_m_freem(mout);
11325 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11328 SCTP_STAT_INCR(sctps_sendpackets);
11329 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11330 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11335 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11336 struct sctphdr *sh,
11337 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11338 uint32_t vrf_id, uint16_t port)
11340 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11341 mflowtype, mflowid, fibnum,
11346 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11347 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11352 struct sctp_tmit_chunk *chk;
11353 struct sctp_heartbeat_chunk *hb;
11354 struct timeval now;
11356 SCTP_TCB_LOCK_ASSERT(stcb);
11360 (void)SCTP_GETTIME_TIMEVAL(&now);
11361 switch (net->ro._l_addr.sa.sa_family) {
11373 sctp_alloc_a_chunk(stcb, chk);
11375 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11378 chk->copy_by_ref = 0;
11379 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11380 chk->rec.chunk_id.can_take_data = 1;
11382 chk->asoc = &stcb->asoc;
11383 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11385 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11386 if (chk->data == NULL) {
11387 sctp_free_a_chunk(stcb, chk, so_locked);
11390 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11391 SCTP_BUF_LEN(chk->data) = chk->send_size;
11392 chk->sent = SCTP_DATAGRAM_UNSENT;
11393 chk->snd_count = 0;
11395 atomic_add_int(&chk->whoTo->ref_count, 1);
11396 /* Now we have a mbuf that we can fill in with the details */
11397 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11398 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11399 /* fill out chunk header */
11400 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11401 hb->ch.chunk_flags = 0;
11402 hb->ch.chunk_length = htons(chk->send_size);
11403 /* Fill out hb parameter */
11404 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11405 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11406 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11407 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11408 /* Did our user request this one, put it in */
11409 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11410 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11411 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11413 * we only take from the entropy pool if the address is not
11416 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11417 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11419 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11420 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11422 switch (net->ro._l_addr.sa.sa_family) {
11425 memcpy(hb->heartbeat.hb_info.address,
11426 &net->ro._l_addr.sin.sin_addr,
11427 sizeof(net->ro._l_addr.sin.sin_addr));
11432 memcpy(hb->heartbeat.hb_info.address,
11433 &net->ro._l_addr.sin6.sin6_addr,
11434 sizeof(net->ro._l_addr.sin6.sin6_addr));
11439 sctp_m_freem(chk->data);
11442 sctp_free_a_chunk(stcb, chk, so_locked);
11446 net->hb_responded = 0;
11447 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11448 stcb->asoc.ctrl_queue_cnt++;
11449 SCTP_STAT_INCR(sctps_sendheartbeat);
11454 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11457 struct sctp_association *asoc;
11458 struct sctp_ecne_chunk *ecne;
11459 struct sctp_tmit_chunk *chk;
11464 asoc = &stcb->asoc;
11465 SCTP_TCB_LOCK_ASSERT(stcb);
11466 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11467 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11468 /* found a previous ECN_ECHO update it if needed */
11469 uint32_t cnt, ctsn;
11471 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11472 ctsn = ntohl(ecne->tsn);
11473 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11474 ecne->tsn = htonl(high_tsn);
11475 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11477 cnt = ntohl(ecne->num_pkts_since_cwr);
11479 ecne->num_pkts_since_cwr = htonl(cnt);
11483 /* nope could not find one to update so we must build one */
11484 sctp_alloc_a_chunk(stcb, chk);
11488 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11489 chk->copy_by_ref = 0;
11490 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11491 chk->rec.chunk_id.can_take_data = 0;
11493 chk->asoc = &stcb->asoc;
11494 chk->send_size = sizeof(struct sctp_ecne_chunk);
11495 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11496 if (chk->data == NULL) {
11497 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11500 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11501 SCTP_BUF_LEN(chk->data) = chk->send_size;
11502 chk->sent = SCTP_DATAGRAM_UNSENT;
11503 chk->snd_count = 0;
11505 atomic_add_int(&chk->whoTo->ref_count, 1);
11507 stcb->asoc.ecn_echo_cnt_onq++;
11508 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11509 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11510 ecne->ch.chunk_flags = 0;
11511 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11512 ecne->tsn = htonl(high_tsn);
11513 ecne->num_pkts_since_cwr = htonl(1);
11514 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11515 asoc->ctrl_queue_cnt++;
11519 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11520 struct mbuf *m, int len, int iphlen, int bad_crc)
11522 struct sctp_association *asoc;
11523 struct sctp_pktdrop_chunk *drp;
11524 struct sctp_tmit_chunk *chk;
11530 struct sctp_chunkhdr *ch, chunk_buf;
11531 unsigned int chk_length;
11536 asoc = &stcb->asoc;
11537 SCTP_TCB_LOCK_ASSERT(stcb);
11538 if (asoc->pktdrop_supported == 0) {
11540 * peer must declare support before I send one.
11544 if (stcb->sctp_socket == NULL) {
11547 sctp_alloc_a_chunk(stcb, chk);
11551 chk->copy_by_ref = 0;
11552 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11553 chk->rec.chunk_id.can_take_data = 1;
11556 chk->send_size = len;
11557 /* Validate that we do not have an ABORT in here. */
11558 offset = iphlen + sizeof(struct sctphdr);
11559 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11560 sizeof(*ch), (uint8_t *) & chunk_buf);
11561 while (ch != NULL) {
11562 chk_length = ntohs(ch->chunk_length);
11563 if (chk_length < sizeof(*ch)) {
11564 /* break to abort land */
11567 switch (ch->chunk_type) {
11568 case SCTP_PACKET_DROPPED:
11569 case SCTP_ABORT_ASSOCIATION:
11570 case SCTP_INITIATION_ACK:
11572 * We don't respond with an PKT-DROP to an ABORT
11573 * or PKT-DROP. We also do not respond to an
11574 * INIT-ACK, because we can't know if the initiation
11575 * tag is correct or not.
11577 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11582 offset += SCTP_SIZE32(chk_length);
11583 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11584 sizeof(*ch), (uint8_t *) & chunk_buf);
11587 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11588 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11590 * only send 1 mtu worth, trim off the excess on the end.
11593 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11596 chk->asoc = &stcb->asoc;
11597 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11598 if (chk->data == NULL) {
11600 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11603 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11604 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11606 sctp_m_freem(chk->data);
11610 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11611 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11612 chk->book_size_scale = 0;
11614 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11615 drp->trunc_len = htons(fullsz);
11617 * Len is already adjusted to size minus overhead above take
11618 * out the pkt_drop chunk itself from it.
11620 chk->send_size = (uint16_t) (len - sizeof(struct sctp_pktdrop_chunk));
11621 len = chk->send_size;
11623 /* no truncation needed */
11624 drp->ch.chunk_flags = 0;
11625 drp->trunc_len = htons(0);
11628 drp->ch.chunk_flags |= SCTP_BADCRC;
11630 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11631 SCTP_BUF_LEN(chk->data) = chk->send_size;
11632 chk->sent = SCTP_DATAGRAM_UNSENT;
11633 chk->snd_count = 0;
11635 /* we should hit here */
11637 atomic_add_int(&chk->whoTo->ref_count, 1);
11641 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11642 drp->ch.chunk_length = htons(chk->send_size);
11643 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11647 drp->bottle_bw = htonl(spc);
11648 if (asoc->my_rwnd) {
11649 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11650 asoc->size_on_all_streams +
11651 asoc->my_rwnd_control_len +
11652 stcb->sctp_socket->so_rcv.sb_cc);
11655 * If my rwnd is 0, possibly from mbuf depletion as well as
11656 * space used, tell the peer there is NO space aka onq == bw
11658 drp->current_onq = htonl(spc);
11662 m_copydata(m, iphlen, len, (caddr_t)datap);
11663 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11664 asoc->ctrl_queue_cnt++;
11668 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11670 struct sctp_association *asoc;
11671 struct sctp_cwr_chunk *cwr;
11672 struct sctp_tmit_chunk *chk;
11674 SCTP_TCB_LOCK_ASSERT(stcb);
11678 asoc = &stcb->asoc;
11679 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11680 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11682 * found a previous CWR queued to same destination
11683 * update it if needed
11687 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11688 ctsn = ntohl(cwr->tsn);
11689 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11690 cwr->tsn = htonl(high_tsn);
11692 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11693 /* Make sure override is carried */
11694 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11699 sctp_alloc_a_chunk(stcb, chk);
11703 chk->copy_by_ref = 0;
11704 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11705 chk->rec.chunk_id.can_take_data = 1;
11707 chk->asoc = &stcb->asoc;
11708 chk->send_size = sizeof(struct sctp_cwr_chunk);
11709 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11710 if (chk->data == NULL) {
11711 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11714 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11715 SCTP_BUF_LEN(chk->data) = chk->send_size;
11716 chk->sent = SCTP_DATAGRAM_UNSENT;
11717 chk->snd_count = 0;
11719 atomic_add_int(&chk->whoTo->ref_count, 1);
11720 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11721 cwr->ch.chunk_type = SCTP_ECN_CWR;
11722 cwr->ch.chunk_flags = override;
11723 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11724 cwr->tsn = htonl(high_tsn);
11725 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11726 asoc->ctrl_queue_cnt++;
11730 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11731 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11733 uint16_t len, old_len, i;
11734 struct sctp_stream_reset_out_request *req_out;
11735 struct sctp_chunkhdr *ch;
11737 int number_entries = 0;
11739 ch = mtod(chk->data, struct sctp_chunkhdr *);
11740 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11741 /* get to new offset for the param. */
11742 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11743 /* now how long will this param be? */
11744 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11745 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11746 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11747 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11751 if (number_entries == 0) {
11754 if (number_entries == stcb->asoc.streamoutcnt) {
11755 number_entries = 0;
11757 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11758 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11760 len = (uint16_t) (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11761 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11762 req_out->ph.param_length = htons(len);
11763 req_out->request_seq = htonl(seq);
11764 req_out->response_seq = htonl(resp_seq);
11765 req_out->send_reset_at_tsn = htonl(last_sent);
11767 if (number_entries) {
11768 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11769 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11770 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11771 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11772 req_out->list_of_streams[at] = htons(i);
11774 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11775 if (at >= number_entries) {
11781 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11782 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11785 if (SCTP_SIZE32(len) > len) {
11787 * Need to worry about the pad we may end up adding to the
11788 * end. This is easy since the struct is either aligned to 4
11789 * bytes or 2 bytes off.
11791 req_out->list_of_streams[number_entries] = 0;
11793 /* now fix the chunk length */
11794 ch->chunk_length = htons(len + old_len);
11795 chk->book_size = len + old_len;
11796 chk->book_size_scale = 0;
11797 chk->send_size = SCTP_SIZE32(chk->book_size);
11798 SCTP_BUF_LEN(chk->data) = chk->send_size;
11803 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11804 int number_entries, uint16_t * list,
11807 uint16_t len, old_len, i;
11808 struct sctp_stream_reset_in_request *req_in;
11809 struct sctp_chunkhdr *ch;
11811 ch = mtod(chk->data, struct sctp_chunkhdr *);
11812 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11814 /* get to new offset for the param. */
11815 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11816 /* now how long will this param be? */
11817 len = (uint16_t) (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11818 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11819 req_in->ph.param_length = htons(len);
11820 req_in->request_seq = htonl(seq);
11821 if (number_entries) {
11822 for (i = 0; i < number_entries; i++) {
11823 req_in->list_of_streams[i] = htons(list[i]);
11826 if (SCTP_SIZE32(len) > len) {
11828 * Need to worry about the pad we may end up adding to the
11829 * end. This is easy since the struct is either aligned to 4
11830 * bytes or 2 bytes off.
11832 req_in->list_of_streams[number_entries] = 0;
11834 /* now fix the chunk length */
11835 ch->chunk_length = htons(len + old_len);
11836 chk->book_size = len + old_len;
11837 chk->book_size_scale = 0;
11838 chk->send_size = SCTP_SIZE32(chk->book_size);
11839 SCTP_BUF_LEN(chk->data) = chk->send_size;
11844 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11847 uint16_t len, old_len;
11848 struct sctp_stream_reset_tsn_request *req_tsn;
11849 struct sctp_chunkhdr *ch;
11851 ch = mtod(chk->data, struct sctp_chunkhdr *);
11852 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11854 /* get to new offset for the param. */
11855 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11856 /* now how long will this param be? */
11857 len = sizeof(struct sctp_stream_reset_tsn_request);
11858 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11859 req_tsn->ph.param_length = htons(len);
11860 req_tsn->request_seq = htonl(seq);
11862 /* now fix the chunk length */
11863 ch->chunk_length = htons(len + old_len);
11864 chk->send_size = len + old_len;
11865 chk->book_size = SCTP_SIZE32(chk->send_size);
11866 chk->book_size_scale = 0;
11867 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11872 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11873 uint32_t resp_seq, uint32_t result)
11875 uint16_t len, old_len;
11876 struct sctp_stream_reset_response *resp;
11877 struct sctp_chunkhdr *ch;
11879 ch = mtod(chk->data, struct sctp_chunkhdr *);
11880 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11882 /* get to new offset for the param. */
11883 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11884 /* now how long will this param be? */
11885 len = sizeof(struct sctp_stream_reset_response);
11886 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11887 resp->ph.param_length = htons(len);
11888 resp->response_seq = htonl(resp_seq);
11889 resp->result = ntohl(result);
11891 /* now fix the chunk length */
11892 ch->chunk_length = htons(len + old_len);
11893 chk->book_size = len + old_len;
11894 chk->book_size_scale = 0;
11895 chk->send_size = SCTP_SIZE32(chk->book_size);
11896 SCTP_BUF_LEN(chk->data) = chk->send_size;
11901 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11902 struct sctp_stream_reset_list *ent,
11905 struct sctp_association *asoc;
11906 struct sctp_tmit_chunk *chk;
11907 struct sctp_chunkhdr *ch;
11909 asoc = &stcb->asoc;
11912 * Reset our last reset action to the new one IP -> response
11913 * (PERFORMED probably). This assures that if we fail to send, a
11914 * retran from the peer will get the new response.
11916 asoc->last_reset_action[0] = response;
11917 if (asoc->stream_reset_outstanding) {
11920 sctp_alloc_a_chunk(stcb, chk);
11922 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11925 chk->copy_by_ref = 0;
11926 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11927 chk->rec.chunk_id.can_take_data = 0;
11929 chk->asoc = &stcb->asoc;
11930 chk->book_size = sizeof(struct sctp_chunkhdr);
11931 chk->send_size = SCTP_SIZE32(chk->book_size);
11932 chk->book_size_scale = 0;
11933 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11934 if (chk->data == NULL) {
11935 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11936 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11939 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11940 sctp_add_stream_reset_result(chk, ent->seq, response);
11941 /* setup chunk parameters */
11942 chk->sent = SCTP_DATAGRAM_UNSENT;
11943 chk->snd_count = 0;
11944 if (stcb->asoc.alternate) {
11945 chk->whoTo = stcb->asoc.alternate;
11947 chk->whoTo = stcb->asoc.primary_destination;
11949 ch = mtod(chk->data, struct sctp_chunkhdr *);
11950 ch->chunk_type = SCTP_STREAM_RESET;
11951 ch->chunk_flags = 0;
11952 ch->chunk_length = htons(chk->book_size);
11953 atomic_add_int(&chk->whoTo->ref_count, 1);
11954 SCTP_BUF_LEN(chk->data) = chk->send_size;
11955 /* insert the chunk for sending */
11956 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11959 asoc->ctrl_queue_cnt++;
11963 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11964 uint32_t resp_seq, uint32_t result,
11965 uint32_t send_una, uint32_t recv_next)
11967 uint16_t len, old_len;
11968 struct sctp_stream_reset_response_tsn *resp;
11969 struct sctp_chunkhdr *ch;
11971 ch = mtod(chk->data, struct sctp_chunkhdr *);
11972 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11974 /* get to new offset for the param. */
11975 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11976 /* now how long will this param be? */
11977 len = sizeof(struct sctp_stream_reset_response_tsn);
11978 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11979 resp->ph.param_length = htons(len);
11980 resp->response_seq = htonl(resp_seq);
11981 resp->result = htonl(result);
11982 resp->senders_next_tsn = htonl(send_una);
11983 resp->receivers_next_tsn = htonl(recv_next);
11985 /* now fix the chunk length */
11986 ch->chunk_length = htons(len + old_len);
11987 chk->book_size = len + old_len;
11988 chk->send_size = SCTP_SIZE32(chk->book_size);
11989 chk->book_size_scale = 0;
11990 SCTP_BUF_LEN(chk->data) = chk->send_size;
11995 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11999 uint16_t len, old_len;
12000 struct sctp_chunkhdr *ch;
12001 struct sctp_stream_reset_add_strm *addstr;
12003 ch = mtod(chk->data, struct sctp_chunkhdr *);
12004 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12006 /* get to new offset for the param. */
12007 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12008 /* now how long will this param be? */
12009 len = sizeof(struct sctp_stream_reset_add_strm);
12012 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
12013 addstr->ph.param_length = htons(len);
12014 addstr->request_seq = htonl(seq);
12015 addstr->number_of_streams = htons(adding);
12016 addstr->reserved = 0;
12018 /* now fix the chunk length */
12019 ch->chunk_length = htons(len + old_len);
12020 chk->send_size = len + old_len;
12021 chk->book_size = SCTP_SIZE32(chk->send_size);
12022 chk->book_size_scale = 0;
12023 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12028 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
12032 uint16_t len, old_len;
12033 struct sctp_chunkhdr *ch;
12034 struct sctp_stream_reset_add_strm *addstr;
12036 ch = mtod(chk->data, struct sctp_chunkhdr *);
12037 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12039 /* get to new offset for the param. */
12040 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12041 /* now how long will this param be? */
12042 len = sizeof(struct sctp_stream_reset_add_strm);
12044 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12045 addstr->ph.param_length = htons(len);
12046 addstr->request_seq = htonl(seq);
12047 addstr->number_of_streams = htons(adding);
12048 addstr->reserved = 0;
12050 /* now fix the chunk length */
12051 ch->chunk_length = htons(len + old_len);
12052 chk->send_size = len + old_len;
12053 chk->book_size = SCTP_SIZE32(chk->send_size);
12054 chk->book_size_scale = 0;
12055 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12060 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12062 struct sctp_association *asoc;
12063 struct sctp_tmit_chunk *chk;
12064 struct sctp_chunkhdr *ch;
12067 asoc = &stcb->asoc;
12068 asoc->trigger_reset = 0;
12069 if (asoc->stream_reset_outstanding) {
12072 sctp_alloc_a_chunk(stcb, chk);
12074 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12077 chk->copy_by_ref = 0;
12078 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12079 chk->rec.chunk_id.can_take_data = 0;
12081 chk->asoc = &stcb->asoc;
12082 chk->book_size = sizeof(struct sctp_chunkhdr);
12083 chk->send_size = SCTP_SIZE32(chk->book_size);
12084 chk->book_size_scale = 0;
12085 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12086 if (chk->data == NULL) {
12087 sctp_free_a_chunk(stcb, chk, so_locked);
12088 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12091 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12093 /* setup chunk parameters */
12094 chk->sent = SCTP_DATAGRAM_UNSENT;
12095 chk->snd_count = 0;
12096 if (stcb->asoc.alternate) {
12097 chk->whoTo = stcb->asoc.alternate;
12099 chk->whoTo = stcb->asoc.primary_destination;
12101 ch = mtod(chk->data, struct sctp_chunkhdr *);
12102 ch->chunk_type = SCTP_STREAM_RESET;
12103 ch->chunk_flags = 0;
12104 ch->chunk_length = htons(chk->book_size);
12105 atomic_add_int(&chk->whoTo->ref_count, 1);
12106 SCTP_BUF_LEN(chk->data) = chk->send_size;
12107 seq = stcb->asoc.str_reset_seq_out;
12108 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12110 asoc->stream_reset_outstanding++;
12112 m_freem(chk->data);
12114 sctp_free_a_chunk(stcb, chk, so_locked);
12117 asoc->str_reset = chk;
12118 /* insert the chunk for sending */
12119 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12122 asoc->ctrl_queue_cnt++;
12124 if (stcb->asoc.send_sack) {
12125 sctp_send_sack(stcb, so_locked);
12127 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12132 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12133 uint16_t number_entries, uint16_t * list,
12134 uint8_t send_in_req,
12135 uint8_t send_tsn_req,
12136 uint8_t add_stream,
12138 uint16_t adding_i, uint8_t peer_asked)
12140 struct sctp_association *asoc;
12141 struct sctp_tmit_chunk *chk;
12142 struct sctp_chunkhdr *ch;
12143 int can_send_out_req = 0;
12146 asoc = &stcb->asoc;
12147 if (asoc->stream_reset_outstanding) {
12149 * Already one pending, must get ACK back to clear the flag.
12151 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12154 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12155 (add_stream == 0)) {
12156 /* nothing to do */
12157 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12160 if (send_tsn_req && send_in_req) {
12161 /* error, can't do that */
12162 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12164 } else if (send_in_req) {
12165 can_send_out_req = 1;
12167 if (number_entries > (MCLBYTES -
12168 SCTP_MIN_OVERHEAD -
12169 sizeof(struct sctp_chunkhdr) -
12170 sizeof(struct sctp_stream_reset_out_request)) /
12171 sizeof(uint16_t)) {
12172 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12175 sctp_alloc_a_chunk(stcb, chk);
12177 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12180 chk->copy_by_ref = 0;
12181 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12182 chk->rec.chunk_id.can_take_data = 0;
12184 chk->asoc = &stcb->asoc;
12185 chk->book_size = sizeof(struct sctp_chunkhdr);
12186 chk->send_size = SCTP_SIZE32(chk->book_size);
12187 chk->book_size_scale = 0;
12189 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12190 if (chk->data == NULL) {
12191 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12192 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12195 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12197 /* setup chunk parameters */
12198 chk->sent = SCTP_DATAGRAM_UNSENT;
12199 chk->snd_count = 0;
12200 if (stcb->asoc.alternate) {
12201 chk->whoTo = stcb->asoc.alternate;
12203 chk->whoTo = stcb->asoc.primary_destination;
12205 atomic_add_int(&chk->whoTo->ref_count, 1);
12206 ch = mtod(chk->data, struct sctp_chunkhdr *);
12207 ch->chunk_type = SCTP_STREAM_RESET;
12208 ch->chunk_flags = 0;
12209 ch->chunk_length = htons(chk->book_size);
12210 SCTP_BUF_LEN(chk->data) = chk->send_size;
12212 seq = stcb->asoc.str_reset_seq_out;
12213 if (can_send_out_req) {
12216 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12219 asoc->stream_reset_outstanding++;
12222 if ((add_stream & 1) &&
12223 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12224 /* Need to allocate more */
12225 struct sctp_stream_out *oldstream;
12226 struct sctp_stream_queue_pending *sp, *nsp;
12229 #if defined(SCTP_DETAILED_STR_STATS)
12234 oldstream = stcb->asoc.strmout;
12235 /* get some more */
12236 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12237 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12239 if (stcb->asoc.strmout == NULL) {
12242 stcb->asoc.strmout = oldstream;
12243 /* Turn off the bit */
12244 x = add_stream & 0xfe;
12249 * Ok now we proceed with copying the old out stuff and
12250 * initializing the new stuff.
12252 SCTP_TCB_SEND_LOCK(stcb);
12253 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12254 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12255 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12256 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12257 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12258 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12259 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12260 stcb->asoc.strmout[i].stream_no = i;
12261 stcb->asoc.strmout[i].state = oldstream[i].state;
12262 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
12263 /* now anything on those queues? */
12264 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12265 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12266 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12268 /* Now move assoc pointers too */
12269 if (stcb->asoc.last_out_stream == &oldstream[i]) {
12270 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
12272 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
12273 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
12276 /* now the new streams */
12277 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12278 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12279 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12280 stcb->asoc.strmout[i].chunks_on_queues = 0;
12281 #if defined(SCTP_DETAILED_STR_STATS)
12282 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12283 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12284 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12287 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12288 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12290 stcb->asoc.strmout[i].next_mid_ordered = 0;
12291 stcb->asoc.strmout[i].next_mid_unordered = 0;
12292 stcb->asoc.strmout[i].stream_no = i;
12293 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12294 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12295 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12297 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12298 SCTP_FREE(oldstream, SCTP_M_STRMO);
12299 SCTP_TCB_SEND_UNLOCK(stcb);
12302 if ((add_stream & 1) && (adding_o > 0)) {
12303 asoc->strm_pending_add_size = adding_o;
12304 asoc->peer_req_out = peer_asked;
12305 sctp_add_an_out_stream(chk, seq, adding_o);
12307 asoc->stream_reset_outstanding++;
12309 if ((add_stream & 2) && (adding_i > 0)) {
12310 sctp_add_an_in_stream(chk, seq, adding_i);
12312 asoc->stream_reset_outstanding++;
12315 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12317 asoc->stream_reset_outstanding++;
12319 if (send_tsn_req) {
12320 sctp_add_stream_reset_tsn(chk, seq);
12321 asoc->stream_reset_outstanding++;
12323 asoc->str_reset = chk;
12324 /* insert the chunk for sending */
12325 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12328 asoc->ctrl_queue_cnt++;
12329 if (stcb->asoc.send_sack) {
12330 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12332 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12337 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12338 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12339 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12340 uint32_t vrf_id, uint16_t port)
12342 /* Don't respond to an ABORT with an ABORT. */
12343 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12345 sctp_m_freem(cause);
12348 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12349 mflowtype, mflowid, fibnum,
12355 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12356 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12357 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12358 uint32_t vrf_id, uint16_t port)
12360 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12361 mflowtype, mflowid, fibnum,
12366 static struct mbuf *
12367 sctp_copy_resume(struct uio *uio,
12369 int user_marks_eor,
12372 struct mbuf **new_tail)
12376 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12377 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12379 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12382 *sndout = m_length(m, NULL);
12383 *new_tail = m_last(m);
12389 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12393 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12395 if (sp->data == NULL) {
12396 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12399 sp->tail_mbuf = m_last(sp->data);
12405 static struct sctp_stream_queue_pending *
12406 sctp_copy_it_in(struct sctp_tcb *stcb,
12407 struct sctp_association *asoc,
12408 struct sctp_sndrcvinfo *srcv,
12410 struct sctp_nets *net,
12412 int user_marks_eor,
12416 * This routine must be very careful in its work. Protocol
12417 * processing is up and running so care must be taken to spl...()
12418 * when you need to do something that may effect the stcb/asoc. The
12419 * sb is locked however. When data is copied the protocol processing
12420 * should be enabled since this is a slower operation...
12422 struct sctp_stream_queue_pending *sp = NULL;
12426 /* Now can we send this? */
12427 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12428 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12429 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12430 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12431 /* got data while shutting down */
12432 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12433 *error = ECONNRESET;
12436 sctp_alloc_a_strmoq(stcb, sp);
12438 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12443 sp->sender_all_done = 0;
12444 sp->sinfo_flags = srcv->sinfo_flags;
12445 sp->timetolive = srcv->sinfo_timetolive;
12446 sp->ppid = srcv->sinfo_ppid;
12447 sp->context = srcv->sinfo_context;
12449 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12451 sp->stream = srcv->sinfo_stream;
12452 sp->length = (uint32_t) min(uio->uio_resid, max_send_len);
12453 if ((sp->length == (uint32_t) uio->uio_resid) &&
12454 ((user_marks_eor == 0) ||
12455 (srcv->sinfo_flags & SCTP_EOF) ||
12456 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12457 sp->msg_is_complete = 1;
12459 sp->msg_is_complete = 0;
12461 sp->sender_all_done = 0;
12462 sp->some_taken = 0;
12463 sp->put_last_out = 0;
12464 resv_in_first = sizeof(struct sctp_data_chunk);
12465 sp->data = sp->tail_mbuf = NULL;
12466 if (sp->length == 0) {
12470 if (srcv->sinfo_keynumber_valid) {
12471 sp->auth_keyid = srcv->sinfo_keynumber;
12473 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12475 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12476 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12477 sp->holds_key_ref = 1;
12479 *error = sctp_copy_one(sp, uio, resv_in_first);
12482 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12485 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12487 atomic_add_int(&sp->net->ref_count, 1);
12491 sctp_set_prsctp_policy(sp);
12499 sctp_sosend(struct socket *so,
12500 struct sockaddr *addr,
12503 struct mbuf *control,
12508 int error, use_sndinfo = 0;
12509 struct sctp_sndrcvinfo sndrcvninfo;
12510 struct sockaddr *addr_to_use;
12512 #if defined(INET) && defined(INET6)
12513 struct sockaddr_in sin;
12518 /* process cmsg snd/rcv info (maybe a assoc-id) */
12519 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12520 sizeof(sndrcvninfo))) {
12525 addr_to_use = addr;
12526 #if defined(INET) && defined(INET6)
12527 if ((addr) && (addr->sa_family == AF_INET6)) {
12528 struct sockaddr_in6 *sin6;
12530 sin6 = (struct sockaddr_in6 *)addr;
12531 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12532 in6_sin6_2_sin(&sin, sin6);
12533 addr_to_use = (struct sockaddr *)&sin;
12537 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12540 use_sndinfo ? &sndrcvninfo : NULL
12548 sctp_lower_sosend(struct socket *so,
12549 struct sockaddr *addr,
12551 struct mbuf *i_pak,
12552 struct mbuf *control,
12554 struct sctp_sndrcvinfo *srcv
12559 unsigned int sndlen = 0, max_len;
12561 struct mbuf *top = NULL;
12562 int queue_only = 0, queue_only_for_init = 0;
12563 int free_cnt_applied = 0;
12565 int now_filled = 0;
12566 unsigned int inqueue_bytes = 0;
12567 struct sctp_block_entry be;
12568 struct sctp_inpcb *inp;
12569 struct sctp_tcb *stcb = NULL;
12570 struct timeval now;
12571 struct sctp_nets *net;
12572 struct sctp_association *asoc;
12573 struct sctp_inpcb *t_inp;
12574 int user_marks_eor;
12575 int create_lock_applied = 0;
12576 int nagle_applies = 0;
12577 int some_on_control = 0;
12578 int got_all_of_the_send = 0;
12579 int hold_tcblock = 0;
12580 int non_blocking = 0;
12581 uint32_t local_add_more, local_soresv = 0;
12583 uint16_t sinfo_flags;
12584 sctp_assoc_t sinfo_assoc_id;
12591 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12593 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12596 SCTP_RELEASE_PKT(i_pak);
12600 if ((uio == NULL) && (i_pak == NULL)) {
12601 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12604 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12605 atomic_add_int(&inp->total_sends, 1);
12607 if (uio->uio_resid < 0) {
12608 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12611 sndlen = (unsigned int)uio->uio_resid;
12613 top = SCTP_HEADER_TO_CHAIN(i_pak);
12614 sndlen = SCTP_HEADER_LEN(i_pak);
12616 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12619 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12620 (inp->sctp_socket->so_qlimit)) {
12621 /* The listener can NOT send */
12622 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12627 * Pre-screen address, if one is given the sin-len
12628 * must be set correctly!
12631 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12633 switch (raddr->sa.sa_family) {
12636 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12637 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12641 port = raddr->sin.sin_port;
12646 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12647 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12651 port = raddr->sin6.sin6_port;
12655 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12656 error = EAFNOSUPPORT;
12663 sinfo_flags = srcv->sinfo_flags;
12664 sinfo_assoc_id = srcv->sinfo_assoc_id;
12665 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12666 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12667 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12671 if (srcv->sinfo_flags)
12672 SCTP_STAT_INCR(sctps_sends_with_flags);
12674 sinfo_flags = inp->def_send.sinfo_flags;
12675 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12677 if (sinfo_flags & SCTP_SENDALL) {
12678 /* its a sendall */
12679 error = sctp_sendall(inp, uio, top, srcv);
12683 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12684 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12688 /* now we must find the assoc */
12689 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12690 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12691 SCTP_INP_RLOCK(inp);
12692 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12694 SCTP_TCB_LOCK(stcb);
12697 SCTP_INP_RUNLOCK(inp);
12698 } else if (sinfo_assoc_id) {
12699 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12702 * Since we did not use findep we must
12703 * increment it, and if we don't find a tcb
12706 SCTP_INP_WLOCK(inp);
12707 SCTP_INP_INCR_REF(inp);
12708 SCTP_INP_WUNLOCK(inp);
12709 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12710 if (stcb == NULL) {
12711 SCTP_INP_WLOCK(inp);
12712 SCTP_INP_DECR_REF(inp);
12713 SCTP_INP_WUNLOCK(inp);
12718 if ((stcb == NULL) && (addr)) {
12719 /* Possible implicit send? */
12720 SCTP_ASOC_CREATE_LOCK(inp);
12721 create_lock_applied = 1;
12722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12723 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12724 /* Should I really unlock ? */
12725 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12730 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12731 (addr->sa_family == AF_INET6)) {
12732 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12736 SCTP_INP_WLOCK(inp);
12737 SCTP_INP_INCR_REF(inp);
12738 SCTP_INP_WUNLOCK(inp);
12739 /* With the lock applied look again */
12740 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12741 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12742 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12744 if (stcb == NULL) {
12745 SCTP_INP_WLOCK(inp);
12746 SCTP_INP_DECR_REF(inp);
12747 SCTP_INP_WUNLOCK(inp);
12754 if (t_inp != inp) {
12755 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12760 if (stcb == NULL) {
12761 if (addr == NULL) {
12762 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12766 /* We must go ahead and start the INIT process */
12769 if ((sinfo_flags & SCTP_ABORT) ||
12770 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12772 * User asks to abort a non-existant assoc,
12773 * or EOF a non-existant assoc with no data
12775 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12779 /* get an asoc/stcb struct */
12780 vrf_id = inp->def_vrf_id;
12782 if (create_lock_applied == 0) {
12783 panic("Error, should hold create lock and I don't?");
12786 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12787 inp->sctp_ep.pre_open_stream_count,
12790 if (stcb == NULL) {
12791 /* Error is setup for us in the call */
12794 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12795 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12797 * Set the connected flag so we can queue
12800 soisconnecting(so);
12803 if (create_lock_applied) {
12804 SCTP_ASOC_CREATE_UNLOCK(inp);
12805 create_lock_applied = 0;
12807 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12810 * Turn on queue only flag to prevent data from
12814 asoc = &stcb->asoc;
12815 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12816 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12818 /* initialize authentication params for the assoc */
12819 sctp_initialize_auth_params(inp, stcb);
12822 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12823 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12824 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12830 /* out with the INIT */
12831 queue_only_for_init = 1;
12833 * we may want to dig in after this call and adjust the MTU
12834 * value. It defaulted to 1500 (constant) but the ro
12835 * structure may now have an update and thus we may need to
12836 * change it BEFORE we append the message.
12840 asoc = &stcb->asoc;
12842 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12843 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12845 net = sctp_findnet(stcb, addr);
12848 if ((net == NULL) ||
12849 ((port != 0) && (port != stcb->rport))) {
12850 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12855 if (stcb->asoc.alternate) {
12856 net = stcb->asoc.alternate;
12858 net = stcb->asoc.primary_destination;
12861 atomic_add_int(&stcb->total_sends, 1);
12862 /* Keep the stcb from being freed under our feet */
12863 atomic_add_int(&asoc->refcnt, 1);
12864 free_cnt_applied = 1;
12866 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12867 if (sndlen > asoc->smallest_mtu) {
12868 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12873 if (SCTP_SO_IS_NBIO(so)
12874 || (flags & MSG_NBIO)
12878 /* would we block? */
12879 if (non_blocking) {
12880 if (hold_tcblock == 0) {
12881 SCTP_TCB_LOCK(stcb);
12884 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12885 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12886 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12887 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12888 if (sndlen > SCTP_SB_LIMIT_SND(so))
12891 error = EWOULDBLOCK;
12894 stcb->asoc.sb_send_resv += sndlen;
12895 SCTP_TCB_UNLOCK(stcb);
12898 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12900 local_soresv = sndlen;
12901 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12902 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12903 error = ECONNRESET;
12906 if (create_lock_applied) {
12907 SCTP_ASOC_CREATE_UNLOCK(inp);
12908 create_lock_applied = 0;
12910 /* Is the stream no. valid? */
12911 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12912 /* Invalid stream number */
12913 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12917 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12918 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12920 * Can't queue any data while stream reset is underway.
12922 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12927 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12930 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12931 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12934 /* we are now done with all control */
12936 sctp_m_freem(control);
12939 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12940 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12941 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12942 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12943 if (srcv->sinfo_flags & SCTP_ABORT) {
12946 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12947 error = ECONNRESET;
12951 /* Ok, we will attempt a msgsnd :> */
12953 p->td_ru.ru_msgsnd++;
12955 /* Are we aborting? */
12956 if (srcv->sinfo_flags & SCTP_ABORT) {
12958 int tot_demand, tot_out = 0, max_out;
12960 SCTP_STAT_INCR(sctps_sends_with_abort);
12961 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12962 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12963 /* It has to be up before we abort */
12964 /* how big is the user initiated abort? */
12965 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12969 if (hold_tcblock) {
12970 SCTP_TCB_UNLOCK(stcb);
12974 struct mbuf *cntm = NULL;
12976 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12978 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12979 tot_out += SCTP_BUF_LEN(cntm);
12983 /* Must fit in a MTU */
12985 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12986 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12988 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12992 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12995 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12999 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
13000 max_out -= sizeof(struct sctp_abort_msg);
13001 if (tot_out > max_out) {
13005 struct sctp_paramhdr *ph;
13007 /* now move forward the data pointer */
13008 ph = mtod(mm, struct sctp_paramhdr *);
13009 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13010 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + tot_out));
13012 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
13014 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13017 * Here if we can't get his data we
13018 * still abort we just don't get to
13019 * send the users note :-0
13026 SCTP_BUF_NEXT(mm) = top;
13030 if (hold_tcblock == 0) {
13031 SCTP_TCB_LOCK(stcb);
13033 atomic_add_int(&stcb->asoc.refcnt, -1);
13034 free_cnt_applied = 0;
13035 /* release this lock, otherwise we hang on ourselves */
13036 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13037 /* now relock the stcb so everything is sane */
13041 * In this case top is already chained to mm avoid double
13042 * free, since we free it below if top != NULL and driver
13043 * would free it after sending the packet out
13050 /* Calculate the maximum we can send */
13051 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13052 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13053 if (non_blocking) {
13054 /* we already checked for non-blocking above. */
13057 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13062 if (hold_tcblock) {
13063 SCTP_TCB_UNLOCK(stcb);
13066 if (asoc->strmout == NULL) {
13067 /* huh? software error */
13068 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13072 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13073 if ((user_marks_eor == 0) &&
13074 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13075 /* It will NEVER fit */
13076 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13080 if ((uio == NULL) && user_marks_eor) {
13082 * We do not support eeor mode for
13083 * sending with mbuf chains (like sendfile).
13085 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13089 if (user_marks_eor) {
13090 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13093 * For non-eeor the whole message must fit in
13094 * the socket send buffer.
13096 local_add_more = sndlen;
13099 if (non_blocking) {
13100 goto skip_preblock;
13102 if (((max_len <= local_add_more) &&
13103 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13105 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13106 /* No room right now ! */
13107 SOCKBUF_LOCK(&so->so_snd);
13108 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13109 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13110 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13111 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13112 (unsigned int)SCTP_SB_LIMIT_SND(so),
13115 stcb->asoc.stream_queue_cnt,
13116 stcb->asoc.chunks_on_out_queue,
13117 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13118 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13119 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13122 stcb->block_entry = &be;
13123 error = sbwait(&so->so_snd);
13124 stcb->block_entry = NULL;
13125 if (error || so->so_error || be.error) {
13128 error = so->so_error;
13133 SOCKBUF_UNLOCK(&so->so_snd);
13136 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13137 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13138 asoc, stcb->asoc.total_output_queue_size);
13140 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13141 SOCKBUF_UNLOCK(&so->so_snd);
13144 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13146 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13147 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13151 SOCKBUF_UNLOCK(&so->so_snd);
13154 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13158 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13159 * case NOTE: uio will be null when top/mbuf is passed
13162 if (srcv->sinfo_flags & SCTP_EOF) {
13163 got_all_of_the_send = 1;
13166 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13172 struct sctp_stream_queue_pending *sp;
13173 struct sctp_stream_out *strm;
13176 SCTP_TCB_SEND_LOCK(stcb);
13177 if ((asoc->stream_locked) &&
13178 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13179 SCTP_TCB_SEND_UNLOCK(stcb);
13180 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13184 SCTP_TCB_SEND_UNLOCK(stcb);
13186 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13187 if (strm->last_msg_incomplete == 0) {
13189 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13190 if ((sp == NULL) || (error)) {
13193 SCTP_TCB_SEND_LOCK(stcb);
13194 if (sp->msg_is_complete) {
13195 strm->last_msg_incomplete = 0;
13196 asoc->stream_locked = 0;
13199 * Just got locked to this guy in case of an
13202 strm->last_msg_incomplete = 1;
13203 if (stcb->asoc.idata_supported == 0) {
13204 asoc->stream_locked = 1;
13205 asoc->stream_locked_on = srcv->sinfo_stream;
13207 sp->sender_all_done = 0;
13209 sctp_snd_sb_alloc(stcb, sp->length);
13210 atomic_add_int(&asoc->stream_queue_cnt, 1);
13211 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13212 SCTP_STAT_INCR(sctps_sends_with_unord);
13214 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13215 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13216 SCTP_TCB_SEND_UNLOCK(stcb);
13218 SCTP_TCB_SEND_LOCK(stcb);
13219 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13220 SCTP_TCB_SEND_UNLOCK(stcb);
13222 /* ???? Huh ??? last msg is gone */
13224 panic("Warning: Last msg marked incomplete, yet nothing left?");
13226 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13227 strm->last_msg_incomplete = 0;
13233 while (uio->uio_resid > 0) {
13234 /* How much room do we have? */
13235 struct mbuf *new_tail, *mm;
13237 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13238 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13242 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13243 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13244 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13247 if (hold_tcblock) {
13248 SCTP_TCB_UNLOCK(stcb);
13251 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13252 if ((mm == NULL) || error) {
13258 /* Update the mbuf and count */
13259 SCTP_TCB_SEND_LOCK(stcb);
13260 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13262 * we need to get out. Peer probably
13266 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13267 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13268 error = ECONNRESET;
13270 SCTP_TCB_SEND_UNLOCK(stcb);
13273 if (sp->tail_mbuf) {
13274 /* tack it to the end */
13275 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13276 sp->tail_mbuf = new_tail;
13278 /* A stolen mbuf */
13280 sp->tail_mbuf = new_tail;
13282 sctp_snd_sb_alloc(stcb, sndout);
13283 atomic_add_int(&sp->length, sndout);
13285 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13286 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13288 /* Did we reach EOR? */
13289 if ((uio->uio_resid == 0) &&
13290 ((user_marks_eor == 0) ||
13291 (srcv->sinfo_flags & SCTP_EOF) ||
13292 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13293 sp->msg_is_complete = 1;
13295 sp->msg_is_complete = 0;
13297 SCTP_TCB_SEND_UNLOCK(stcb);
13299 if (uio->uio_resid == 0) {
13304 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13306 * This is ugly but we must assure locking
13309 if (hold_tcblock == 0) {
13310 SCTP_TCB_LOCK(stcb);
13313 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13314 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13315 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13316 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13322 SCTP_TCB_UNLOCK(stcb);
13325 /* wait for space now */
13326 if (non_blocking) {
13327 /* Non-blocking io in place out */
13330 /* What about the INIT, send it maybe */
13331 if (queue_only_for_init) {
13332 if (hold_tcblock == 0) {
13333 SCTP_TCB_LOCK(stcb);
13336 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13337 /* a collision took us forward? */
13340 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13341 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13345 if ((net->flight_size > net->cwnd) &&
13346 (asoc->sctp_cmt_on_off == 0)) {
13347 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13349 } else if (asoc->ifp_had_enobuf) {
13350 SCTP_STAT_INCR(sctps_ifnomemqueued);
13351 if (net->flight_size > (2 * net->mtu)) {
13354 asoc->ifp_had_enobuf = 0;
13356 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13357 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13358 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13359 (stcb->asoc.total_flight > 0) &&
13360 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13361 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13364 * Ok, Nagle is set on and we have data outstanding.
13365 * Don't send anything and let SACKs drive out the
13366 * data unless we have a "full" segment to send.
13368 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13369 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13371 SCTP_STAT_INCR(sctps_naglequeued);
13374 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13375 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13376 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13378 SCTP_STAT_INCR(sctps_naglesent);
13381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13383 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13384 nagle_applies, un_sent);
13385 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13386 stcb->asoc.total_flight,
13387 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13389 if (queue_only_for_init)
13390 queue_only_for_init = 0;
13391 if ((queue_only == 0) && (nagle_applies == 0)) {
13393 * need to start chunk output
13394 * before blocking.. note that if
13395 * a lock is already applied, then
13396 * the input via the net is happening
13397 * and I don't need to start output :-D
13399 if (hold_tcblock == 0) {
13400 if (SCTP_TCB_TRYLOCK(stcb)) {
13402 sctp_chunk_output(inp,
13404 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13407 sctp_chunk_output(inp,
13409 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13411 if (hold_tcblock == 1) {
13412 SCTP_TCB_UNLOCK(stcb);
13416 SOCKBUF_LOCK(&so->so_snd);
13418 * This is a bit strange, but I think it will
13419 * work. The total_output_queue_size is locked and
13420 * protected by the TCB_LOCK, which we just released.
13421 * There is a race that can occur between releasing it
13422 * above, and me getting the socket lock, where sacks
13423 * come in but we have not put the SB_WAIT on the
13424 * so_snd buffer to get the wakeup. After the LOCK
13425 * is applied the sack_processing will also need to
13426 * LOCK the so->so_snd to do the actual sowwakeup(). So
13427 * once we have the socket buffer lock if we recheck the
13428 * size we KNOW we will get to sleep safely with the
13429 * wakeup flag in place.
13431 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13432 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13433 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13434 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13435 asoc, (size_t)uio->uio_resid);
13438 stcb->block_entry = &be;
13439 error = sbwait(&so->so_snd);
13440 stcb->block_entry = NULL;
13442 if (error || so->so_error || be.error) {
13445 error = so->so_error;
13450 SOCKBUF_UNLOCK(&so->so_snd);
13453 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13454 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13455 asoc, stcb->asoc.total_output_queue_size);
13458 SOCKBUF_UNLOCK(&so->so_snd);
13459 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13463 SCTP_TCB_SEND_LOCK(stcb);
13465 if (sp->msg_is_complete == 0) {
13466 strm->last_msg_incomplete = 1;
13467 if (stcb->asoc.idata_supported == 0) {
13468 asoc->stream_locked = 1;
13469 asoc->stream_locked_on = srcv->sinfo_stream;
13472 sp->sender_all_done = 1;
13473 strm->last_msg_incomplete = 0;
13474 asoc->stream_locked = 0;
13477 SCTP_PRINTF("Huh no sp TSNH?\n");
13478 strm->last_msg_incomplete = 0;
13479 asoc->stream_locked = 0;
13481 SCTP_TCB_SEND_UNLOCK(stcb);
13482 if (uio->uio_resid == 0) {
13483 got_all_of_the_send = 1;
13486 /* We send in a 0, since we do NOT have any locks */
13487 error = sctp_msg_append(stcb, net, top, srcv, 0);
13489 if (srcv->sinfo_flags & SCTP_EOF) {
13491 * This should only happen for Panda for the mbuf
13492 * send case, which does NOT yet support EEOR mode.
13493 * Thus, we can just set this flag to do the proper
13496 got_all_of_the_send = 1;
13504 if ((srcv->sinfo_flags & SCTP_EOF) &&
13505 (got_all_of_the_send == 1)) {
13508 SCTP_STAT_INCR(sctps_sends_with_eof);
13510 if (hold_tcblock == 0) {
13511 SCTP_TCB_LOCK(stcb);
13514 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13515 if (TAILQ_EMPTY(&asoc->send_queue) &&
13516 TAILQ_EMPTY(&asoc->sent_queue) &&
13518 if (asoc->locked_on_sending) {
13521 /* there is nothing queued to send, so I'm done... */
13522 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13523 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13524 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13525 struct sctp_nets *netp;
13527 /* only send SHUTDOWN the first time through */
13528 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13529 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13531 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13532 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13533 sctp_stop_timers_for_shutdown(stcb);
13534 if (stcb->asoc.alternate) {
13535 netp = stcb->asoc.alternate;
13537 netp = stcb->asoc.primary_destination;
13539 sctp_send_shutdown(stcb, netp);
13540 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13542 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13543 asoc->primary_destination);
13547 * we still got (or just got) data to send, so set
13551 * XXX sockets draft says that SCTP_EOF should be
13552 * sent with no data. currently, we will allow user
13553 * data to be sent first and move to
13556 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13557 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13558 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13559 if (hold_tcblock == 0) {
13560 SCTP_TCB_LOCK(stcb);
13563 if (asoc->locked_on_sending) {
13564 /* Locked to send out the data */
13565 struct sctp_stream_queue_pending *sp;
13567 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13569 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13570 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13573 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13574 if (TAILQ_EMPTY(&asoc->send_queue) &&
13575 TAILQ_EMPTY(&asoc->sent_queue) &&
13576 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13577 struct mbuf *op_err;
13578 char msg[SCTP_DIAG_INFO_LEN];
13581 if (free_cnt_applied) {
13582 atomic_add_int(&stcb->asoc.refcnt, -1);
13583 free_cnt_applied = 0;
13585 snprintf(msg, sizeof(msg),
13586 "%s:%d at %s", __FILE__, __LINE__, __func__);
13587 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13589 sctp_abort_an_association(stcb->sctp_ep, stcb,
13590 op_err, SCTP_SO_LOCKED);
13592 * now relock the stcb so everything
13599 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13600 asoc->primary_destination);
13601 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13606 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13607 some_on_control = 1;
13609 if (queue_only_for_init) {
13610 if (hold_tcblock == 0) {
13611 SCTP_TCB_LOCK(stcb);
13614 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13615 /* a collision took us forward? */
13618 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13619 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13623 if ((net->flight_size > net->cwnd) &&
13624 (stcb->asoc.sctp_cmt_on_off == 0)) {
13625 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13627 } else if (asoc->ifp_had_enobuf) {
13628 SCTP_STAT_INCR(sctps_ifnomemqueued);
13629 if (net->flight_size > (2 * net->mtu)) {
13632 asoc->ifp_had_enobuf = 0;
13634 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13635 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13636 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13637 (stcb->asoc.total_flight > 0) &&
13638 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13639 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13641 * Ok, Nagle is set on and we have data outstanding.
13642 * Don't send anything and let SACKs drive out the
13643 * data unless wen have a "full" segment to send.
13645 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13646 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13648 SCTP_STAT_INCR(sctps_naglequeued);
13651 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13652 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13653 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13655 SCTP_STAT_INCR(sctps_naglesent);
13658 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13659 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13660 nagle_applies, un_sent);
13661 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13662 stcb->asoc.total_flight,
13663 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13665 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13666 /* we can attempt to send too. */
13667 if (hold_tcblock == 0) {
13669 * If there is activity recv'ing sacks no need to
13672 if (SCTP_TCB_TRYLOCK(stcb)) {
13673 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13677 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13679 } else if ((queue_only == 0) &&
13680 (stcb->asoc.peers_rwnd == 0) &&
13681 (stcb->asoc.total_flight == 0)) {
13682 /* We get to have a probe outstanding */
13683 if (hold_tcblock == 0) {
13685 SCTP_TCB_LOCK(stcb);
13687 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13688 } else if (some_on_control) {
13689 int num_out, reason, frag_point;
13691 /* Here we do control only */
13692 if (hold_tcblock == 0) {
13694 SCTP_TCB_LOCK(stcb);
13696 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13697 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13698 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13700 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13701 queue_only, stcb->asoc.peers_rwnd, un_sent,
13702 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13703 stcb->asoc.total_output_queue_size, error);
13708 if (local_soresv && stcb) {
13709 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13711 if (create_lock_applied) {
13712 SCTP_ASOC_CREATE_UNLOCK(inp);
13714 if ((stcb) && hold_tcblock) {
13715 SCTP_TCB_UNLOCK(stcb);
13717 if (stcb && free_cnt_applied) {
13718 atomic_add_int(&stcb->asoc.refcnt, -1);
13722 if (mtx_owned(&stcb->tcb_mtx)) {
13723 panic("Leaving with tcb mtx owned?");
13725 if (mtx_owned(&stcb->tcb_send_mtx)) {
13726 panic("Leaving with tcb send mtx owned?");
13734 sctp_m_freem(control);
13741 * generate an AUTHentication chunk, if required
13744 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13745 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13746 struct sctp_tcb *stcb, uint8_t chunk)
13748 struct mbuf *m_auth;
13749 struct sctp_auth_chunk *auth;
13753 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13757 if (stcb->asoc.auth_supported == 0) {
13760 /* does the requested chunk require auth? */
13761 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13764 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13765 if (m_auth == NULL) {
13769 /* reserve some space if this will be the first mbuf */
13771 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13772 /* fill in the AUTH chunk details */
13773 auth = mtod(m_auth, struct sctp_auth_chunk *);
13774 bzero(auth, sizeof(*auth));
13775 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13776 auth->ch.chunk_flags = 0;
13777 chunk_len = sizeof(*auth) +
13778 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13779 auth->ch.chunk_length = htons(chunk_len);
13780 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13781 /* key id and hmac digest will be computed and filled in upon send */
13783 /* save the offset where the auth was inserted into the chain */
13785 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13786 *offset += SCTP_BUF_LEN(cn);
13789 /* update length and return pointer to the auth chunk */
13790 SCTP_BUF_LEN(m_auth) = chunk_len;
13791 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13792 if (auth_ret != NULL)
13800 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13802 struct nd_prefix *pfx = NULL;
13803 struct nd_pfxrouter *pfxrtr = NULL;
13804 struct sockaddr_in6 gw6;
13806 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13809 /* get prefix entry of address */
13810 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13811 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13813 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13814 &src6->sin6_addr, &pfx->ndpr_mask))
13817 /* no prefix entry in the prefix list */
13819 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13820 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13823 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13824 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13826 /* search installed gateway from prefix entry */
13827 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13828 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13829 gw6.sin6_family = AF_INET6;
13830 gw6.sin6_len = sizeof(struct sockaddr_in6);
13831 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13832 sizeof(struct in6_addr));
13833 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13834 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13835 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13836 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13837 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13838 ro->ro_rt->rt_gateway)) {
13839 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13843 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13850 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13853 struct sockaddr_in *sin, *mask;
13854 struct ifaddr *ifa;
13855 struct in_addr srcnetaddr, gwnetaddr;
13857 if (ro == NULL || ro->ro_rt == NULL ||
13858 sifa->address.sa.sa_family != AF_INET) {
13861 ifa = (struct ifaddr *)sifa->ifa;
13862 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13863 sin = &sifa->address.sin;
13864 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13865 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13866 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13867 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13869 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13870 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13871 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13872 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13873 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13874 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {