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 *paramh;
1948 switch (ifa->address.sa.sa_family) {
1951 plen = (uint16_t)sizeof(struct sctp_ipv4addr_param);
1956 plen = (uint16_t)sizeof(struct sctp_ipv6addr_param);
1962 #if defined(INET) || defined(INET6)
1963 if (M_TRAILINGSPACE(m) >= plen) {
1964 /* easy side we just drop it on the end */
1965 paramh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1968 /* Need more space */
1970 while (SCTP_BUF_NEXT(mret) != NULL) {
1971 mret = SCTP_BUF_NEXT(mret);
1973 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1974 if (SCTP_BUF_NEXT(mret) == NULL) {
1975 /* We are hosed, can't add more addresses */
1978 mret = SCTP_BUF_NEXT(mret);
1979 paramh = mtod(mret, struct sctp_paramhdr *);
1981 /* now add the parameter */
1982 switch (ifa->address.sa.sa_family) {
1986 struct sctp_ipv4addr_param *ipv4p;
1987 struct sockaddr_in *sin;
1989 sin = &ifa->address.sin;
1990 ipv4p = (struct sctp_ipv4addr_param *)paramh;
1991 paramh->param_type = htons(SCTP_IPV4_ADDRESS);
1992 paramh->param_length = htons(plen);
1993 ipv4p->addr = sin->sin_addr.s_addr;
1994 SCTP_BUF_LEN(mret) += plen;
2001 struct sctp_ipv6addr_param *ipv6p;
2002 struct sockaddr_in6 *sin6;
2004 sin6 = &ifa->address.sin6;
2005 ipv6p = (struct sctp_ipv6addr_param *)paramh;
2006 paramh->param_type = htons(SCTP_IPV6_ADDRESS);
2007 paramh->param_length = htons(plen);
2008 memcpy(ipv6p->addr, &sin6->sin6_addr,
2009 sizeof(ipv6p->addr));
2010 /* clear embedded scope in the address */
2011 in6_clearscope((struct in6_addr *)ipv6p->addr);
2012 SCTP_BUF_LEN(mret) += plen;
2028 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2029 struct sctp_scoping *scope,
2030 struct mbuf *m_at, int cnt_inits_to,
2031 uint16_t *padding_len, uint16_t *chunk_len)
2033 struct sctp_vrf *vrf = NULL;
2034 int cnt, limit_out = 0, total_count;
2037 vrf_id = inp->def_vrf_id;
2038 SCTP_IPI_ADDR_RLOCK();
2039 vrf = sctp_find_vrf(vrf_id);
2041 SCTP_IPI_ADDR_RUNLOCK();
2044 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2045 struct sctp_ifa *sctp_ifap;
2046 struct sctp_ifn *sctp_ifnp;
2049 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2051 cnt = SCTP_ADDRESS_LIMIT;
2054 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2055 if ((scope->loopback_scope == 0) &&
2056 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2058 * Skip loopback devices if loopback_scope
2063 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2065 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2066 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2067 &sctp_ifap->address.sin.sin_addr) != 0)) {
2072 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2073 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2074 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2078 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2081 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2085 if (cnt > SCTP_ADDRESS_LIMIT) {
2089 if (cnt > SCTP_ADDRESS_LIMIT) {
2096 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2098 if ((scope->loopback_scope == 0) &&
2099 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2101 * Skip loopback devices if
2102 * loopback_scope not set
2106 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2108 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2109 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2110 &sctp_ifap->address.sin.sin_addr) != 0)) {
2115 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2116 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2117 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2121 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2124 if (sctp_is_address_in_scope(sctp_ifap,
2128 if ((chunk_len != NULL) &&
2129 (padding_len != NULL) &&
2130 (*padding_len > 0)) {
2131 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2132 SCTP_BUF_LEN(m_at) += *padding_len;
2133 *chunk_len += *padding_len;
2136 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2147 if (total_count > SCTP_ADDRESS_LIMIT) {
2148 /* No more addresses */
2156 struct sctp_laddr *laddr;
2159 /* First, how many ? */
2160 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2161 if (laddr->ifa == NULL) {
2164 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2166 * Address being deleted by the system, dont
2170 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2172 * Address being deleted on this ep don't
2177 if (sctp_is_address_in_scope(laddr->ifa,
2184 * To get through a NAT we only list addresses if we have
2185 * more than one. That way if you just bind a single address
2186 * we let the source of the init dictate our address.
2190 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2191 if (laddr->ifa == NULL) {
2194 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2197 if (sctp_is_address_in_scope(laddr->ifa,
2201 if ((chunk_len != NULL) &&
2202 (padding_len != NULL) &&
2203 (*padding_len > 0)) {
2204 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2205 SCTP_BUF_LEN(m_at) += *padding_len;
2206 *chunk_len += *padding_len;
2209 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2211 if (cnt >= SCTP_ADDRESS_LIMIT) {
2217 SCTP_IPI_ADDR_RUNLOCK();
2221 static struct sctp_ifa *
2222 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2223 uint8_t dest_is_loop,
2224 uint8_t dest_is_priv,
2227 uint8_t dest_is_global = 0;
2229 /* dest_is_priv is true if destination is a private address */
2230 /* dest_is_loop is true if destination is a loopback addresses */
2233 * Here we determine if its a preferred address. A preferred address
2234 * means it is the same scope or higher scope then the destination.
2235 * L = loopback, P = private, G = global
2236 * -----------------------------------------
2237 * src | dest | result
2238 * ----------------------------------------
2240 * -----------------------------------------
2241 * P | L | yes-v4 no-v6
2242 * -----------------------------------------
2243 * G | L | yes-v4 no-v6
2244 * -----------------------------------------
2246 * -----------------------------------------
2248 * -----------------------------------------
2250 * -----------------------------------------
2252 * -----------------------------------------
2254 * -----------------------------------------
2256 * -----------------------------------------
2259 if (ifa->address.sa.sa_family != fam) {
2260 /* forget mis-matched family */
2263 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2266 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2267 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2268 /* Ok the address may be ok */
2270 if (fam == AF_INET6) {
2271 /* ok to use deprecated addresses? no lets not! */
2272 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2273 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2276 if (ifa->src_is_priv && !ifa->src_is_loop) {
2278 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2282 if (ifa->src_is_glob) {
2284 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2291 * Now that we know what is what, implement or table this could in
2292 * theory be done slicker (it used to be), but this is
2293 * straightforward and easier to validate :-)
2295 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2296 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2297 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2298 dest_is_loop, dest_is_priv, dest_is_global);
2300 if ((ifa->src_is_loop) && (dest_is_priv)) {
2301 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2304 if ((ifa->src_is_glob) && (dest_is_priv)) {
2305 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2308 if ((ifa->src_is_loop) && (dest_is_global)) {
2309 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2312 if ((ifa->src_is_priv) && (dest_is_global)) {
2313 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2316 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2317 /* its a preferred address */
2321 static struct sctp_ifa *
2322 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2323 uint8_t dest_is_loop,
2324 uint8_t dest_is_priv,
2327 uint8_t dest_is_global = 0;
2330 * Here we determine if its a acceptable address. A acceptable
2331 * address means it is the same scope or higher scope but we can
2332 * allow for NAT which means its ok to have a global dest and a
2335 * L = loopback, P = private, G = global
2336 * -----------------------------------------
2337 * src | dest | result
2338 * -----------------------------------------
2340 * -----------------------------------------
2341 * P | L | yes-v4 no-v6
2342 * -----------------------------------------
2344 * -----------------------------------------
2346 * -----------------------------------------
2348 * -----------------------------------------
2349 * G | P | yes - May not work
2350 * -----------------------------------------
2352 * -----------------------------------------
2353 * P | G | yes - May not work
2354 * -----------------------------------------
2356 * -----------------------------------------
2359 if (ifa->address.sa.sa_family != fam) {
2360 /* forget non matching family */
2361 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2362 ifa->address.sa.sa_family, fam);
2365 /* Ok the address may be ok */
2366 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2367 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2368 dest_is_loop, dest_is_priv);
2369 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2373 if (fam == AF_INET6) {
2374 /* ok to use deprecated addresses? */
2375 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2378 if (ifa->src_is_priv) {
2379 /* Special case, linklocal to loop */
2386 * Now that we know what is what, implement our table. This could in
2387 * theory be done slicker (it used to be), but this is
2388 * straightforward and easier to validate :-)
2390 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2393 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2396 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2399 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2402 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2403 /* its an acceptable address */
2408 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2410 struct sctp_laddr *laddr;
2413 /* There are no restrictions, no TCB :-) */
2416 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2417 if (laddr->ifa == NULL) {
2418 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2422 if (laddr->ifa == ifa) {
2423 /* Yes it is on the list */
2432 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2434 struct sctp_laddr *laddr;
2438 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2439 if (laddr->ifa == NULL) {
2440 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2444 if ((laddr->ifa == ifa) && laddr->action == 0)
2453 static struct sctp_ifa *
2454 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2457 int non_asoc_addr_ok,
2458 uint8_t dest_is_priv,
2459 uint8_t dest_is_loop,
2462 struct sctp_laddr *laddr, *starting_point;
2465 struct sctp_ifn *sctp_ifn;
2466 struct sctp_ifa *sctp_ifa, *sifa;
2467 struct sctp_vrf *vrf;
2470 vrf = sctp_find_vrf(vrf_id);
2474 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2475 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2476 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2478 * first question, is the ifn we will emit on in our list, if so, we
2479 * want such an address. Note that we first looked for a preferred
2483 /* is a preferred one on the interface we route out? */
2484 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2486 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2487 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2488 &sctp_ifa->address.sin.sin_addr) != 0)) {
2493 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2494 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2495 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2499 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2500 (non_asoc_addr_ok == 0))
2502 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2507 if (sctp_is_addr_in_ep(inp, sifa)) {
2508 atomic_add_int(&sifa->refcount, 1);
2514 * ok, now we now need to find one on the list of the addresses. We
2515 * can't get one on the emitting interface so let's find first a
2516 * preferred one. If not that an acceptable one otherwise... we
2519 starting_point = inp->next_addr_touse;
2521 if (inp->next_addr_touse == NULL) {
2522 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2525 for (laddr = inp->next_addr_touse; laddr;
2526 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2527 if (laddr->ifa == NULL) {
2528 /* address has been removed */
2531 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2532 /* address is being deleted */
2535 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2539 atomic_add_int(&sifa->refcount, 1);
2542 if (resettotop == 0) {
2543 inp->next_addr_touse = NULL;
2546 inp->next_addr_touse = starting_point;
2549 if (inp->next_addr_touse == NULL) {
2550 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2553 /* ok, what about an acceptable address in the inp */
2554 for (laddr = inp->next_addr_touse; laddr;
2555 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2556 if (laddr->ifa == NULL) {
2557 /* address has been removed */
2560 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2561 /* address is being deleted */
2564 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2568 atomic_add_int(&sifa->refcount, 1);
2571 if (resettotop == 0) {
2572 inp->next_addr_touse = NULL;
2573 goto once_again_too;
2576 * no address bound can be a source for the destination we are in
2584 static struct sctp_ifa *
2585 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2586 struct sctp_tcb *stcb,
2589 uint8_t dest_is_priv,
2590 uint8_t dest_is_loop,
2591 int non_asoc_addr_ok,
2594 struct sctp_laddr *laddr, *starting_point;
2596 struct sctp_ifn *sctp_ifn;
2597 struct sctp_ifa *sctp_ifa, *sifa;
2598 uint8_t start_at_beginning = 0;
2599 struct sctp_vrf *vrf;
2603 * first question, is the ifn we will emit on in our list, if so, we
2606 vrf = sctp_find_vrf(vrf_id);
2610 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2611 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2612 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2615 * first question, is the ifn we will emit on in our list? If so,
2616 * we want that one. First we look for a preferred. Second, we go
2617 * for an acceptable.
2620 /* first try for a preferred address on the ep */
2621 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2623 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2624 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2625 &sctp_ifa->address.sin.sin_addr) != 0)) {
2630 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2631 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2632 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2636 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2638 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2639 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2642 if (((non_asoc_addr_ok == 0) &&
2643 (sctp_is_addr_restricted(stcb, sifa))) ||
2644 (non_asoc_addr_ok &&
2645 (sctp_is_addr_restricted(stcb, sifa)) &&
2646 (!sctp_is_addr_pending(stcb, sifa)))) {
2647 /* on the no-no list */
2650 atomic_add_int(&sifa->refcount, 1);
2654 /* next try for an acceptable address on the ep */
2655 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2657 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2658 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2659 &sctp_ifa->address.sin.sin_addr) != 0)) {
2664 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2665 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2666 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2670 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2672 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2673 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2676 if (((non_asoc_addr_ok == 0) &&
2677 (sctp_is_addr_restricted(stcb, sifa))) ||
2678 (non_asoc_addr_ok &&
2679 (sctp_is_addr_restricted(stcb, sifa)) &&
2680 (!sctp_is_addr_pending(stcb, sifa)))) {
2681 /* on the no-no list */
2684 atomic_add_int(&sifa->refcount, 1);
2691 * if we can't find one like that then we must look at all addresses
2692 * bound to pick one at first preferable then secondly acceptable.
2694 starting_point = stcb->asoc.last_used_address;
2696 if (stcb->asoc.last_used_address == NULL) {
2697 start_at_beginning = 1;
2698 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2700 /* search beginning with the last used address */
2701 for (laddr = stcb->asoc.last_used_address; laddr;
2702 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2703 if (laddr->ifa == NULL) {
2704 /* address has been removed */
2707 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2708 /* address is being deleted */
2711 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2714 if (((non_asoc_addr_ok == 0) &&
2715 (sctp_is_addr_restricted(stcb, sifa))) ||
2716 (non_asoc_addr_ok &&
2717 (sctp_is_addr_restricted(stcb, sifa)) &&
2718 (!sctp_is_addr_pending(stcb, sifa)))) {
2719 /* on the no-no list */
2722 stcb->asoc.last_used_address = laddr;
2723 atomic_add_int(&sifa->refcount, 1);
2726 if (start_at_beginning == 0) {
2727 stcb->asoc.last_used_address = NULL;
2728 goto sctp_from_the_top;
2730 /* now try for any higher scope than the destination */
2731 stcb->asoc.last_used_address = starting_point;
2732 start_at_beginning = 0;
2734 if (stcb->asoc.last_used_address == NULL) {
2735 start_at_beginning = 1;
2736 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2738 /* search beginning with the last used address */
2739 for (laddr = stcb->asoc.last_used_address; laddr;
2740 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2741 if (laddr->ifa == NULL) {
2742 /* address has been removed */
2745 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2746 /* address is being deleted */
2749 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2753 if (((non_asoc_addr_ok == 0) &&
2754 (sctp_is_addr_restricted(stcb, sifa))) ||
2755 (non_asoc_addr_ok &&
2756 (sctp_is_addr_restricted(stcb, sifa)) &&
2757 (!sctp_is_addr_pending(stcb, sifa)))) {
2758 /* on the no-no list */
2761 stcb->asoc.last_used_address = laddr;
2762 atomic_add_int(&sifa->refcount, 1);
2765 if (start_at_beginning == 0) {
2766 stcb->asoc.last_used_address = NULL;
2767 goto sctp_from_the_top2;
2772 static struct sctp_ifa *
2773 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2774 struct sctp_inpcb *inp,
2775 struct sctp_tcb *stcb,
2776 int non_asoc_addr_ok,
2777 uint8_t dest_is_loop,
2778 uint8_t dest_is_priv,
2784 struct sctp_ifa *ifa, *sifa;
2785 int num_eligible_addr = 0;
2787 struct sockaddr_in6 sin6, lsa6;
2789 if (fam == AF_INET6) {
2790 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2791 (void)sa6_recoverscope(&sin6);
2794 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2796 if ((ifa->address.sa.sa_family == AF_INET) &&
2797 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2798 &ifa->address.sin.sin_addr) != 0)) {
2803 if ((ifa->address.sa.sa_family == AF_INET6) &&
2804 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2805 &ifa->address.sin6.sin6_addr) != 0)) {
2809 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2810 (non_asoc_addr_ok == 0))
2812 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2817 if (fam == AF_INET6 &&
2819 sifa->src_is_loop && sifa->src_is_priv) {
2821 * don't allow fe80::1 to be a src on loop ::1, we
2822 * don't list it to the peer so we will get an
2827 if (fam == AF_INET6 &&
2828 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2829 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2831 * link-local <-> link-local must belong to the same
2834 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2835 (void)sa6_recoverscope(&lsa6);
2836 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2843 * Check if the IPv6 address matches to next-hop. In the
2844 * mobile case, old IPv6 address may be not deleted from the
2845 * interface. Then, the interface has previous and new
2846 * addresses. We should use one corresponding to the
2847 * next-hop. (by micchie)
2850 if (stcb && fam == AF_INET6 &&
2851 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2852 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2859 /* Avoid topologically incorrect IPv4 address */
2860 if (stcb && fam == AF_INET &&
2861 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2862 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2868 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2871 if (((non_asoc_addr_ok == 0) &&
2872 (sctp_is_addr_restricted(stcb, sifa))) ||
2873 (non_asoc_addr_ok &&
2874 (sctp_is_addr_restricted(stcb, sifa)) &&
2875 (!sctp_is_addr_pending(stcb, sifa)))) {
2877 * It is restricted for some reason..
2878 * probably not yet added.
2883 if (num_eligible_addr >= addr_wanted) {
2886 num_eligible_addr++;
2893 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2894 struct sctp_inpcb *inp,
2895 struct sctp_tcb *stcb,
2896 int non_asoc_addr_ok,
2897 uint8_t dest_is_loop,
2898 uint8_t dest_is_priv,
2901 struct sctp_ifa *ifa, *sifa;
2902 int num_eligible_addr = 0;
2904 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2906 if ((ifa->address.sa.sa_family == AF_INET) &&
2907 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2908 &ifa->address.sin.sin_addr) != 0)) {
2913 if ((ifa->address.sa.sa_family == AF_INET6) &&
2915 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2916 &ifa->address.sin6.sin6_addr) != 0)) {
2920 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2921 (non_asoc_addr_ok == 0)) {
2924 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2930 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2933 if (((non_asoc_addr_ok == 0) &&
2934 (sctp_is_addr_restricted(stcb, sifa))) ||
2935 (non_asoc_addr_ok &&
2936 (sctp_is_addr_restricted(stcb, sifa)) &&
2937 (!sctp_is_addr_pending(stcb, sifa)))) {
2939 * It is restricted for some reason..
2940 * probably not yet added.
2945 num_eligible_addr++;
2947 return (num_eligible_addr);
2950 static struct sctp_ifa *
2951 sctp_choose_boundall(struct sctp_inpcb *inp,
2952 struct sctp_tcb *stcb,
2953 struct sctp_nets *net,
2956 uint8_t dest_is_priv,
2957 uint8_t dest_is_loop,
2958 int non_asoc_addr_ok,
2961 int cur_addr_num = 0, num_preferred = 0;
2963 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2964 struct sctp_ifa *sctp_ifa, *sifa;
2966 struct sctp_vrf *vrf;
2972 * For boundall we can use any address in the association.
2973 * If non_asoc_addr_ok is set we can use any address (at least in
2974 * theory). So we look for preferred addresses first. If we find one,
2975 * we use it. Otherwise we next try to get an address on the
2976 * interface, which we should be able to do (unless non_asoc_addr_ok
2977 * is false and we are routed out that way). In these cases where we
2978 * can't use the address of the interface we go through all the
2979 * ifn's looking for an address we can use and fill that in. Punting
2980 * means we send back address 0, which will probably cause problems
2981 * actually since then IP will fill in the address of the route ifn,
2982 * which means we probably already rejected it.. i.e. here comes an
2985 vrf = sctp_find_vrf(vrf_id);
2989 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2990 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2991 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2992 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2993 if (sctp_ifn == NULL) {
2994 /* ?? We don't have this guy ?? */
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2996 goto bound_all_plan_b;
2998 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2999 ifn_index, sctp_ifn->ifn_name);
3002 cur_addr_num = net->indx_of_eligible_next_to_use;
3004 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3009 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3010 num_preferred, sctp_ifn->ifn_name);
3011 if (num_preferred == 0) {
3013 * no eligible addresses, we must use some other interface
3014 * address if we can find one.
3016 goto bound_all_plan_b;
3019 * Ok we have num_eligible_addr set with how many we can use, this
3020 * may vary from call to call due to addresses being deprecated
3023 if (cur_addr_num >= num_preferred) {
3027 * select the nth address from the list (where cur_addr_num is the
3028 * nth) and 0 is the first one, 1 is the second one etc...
3030 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3032 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3033 dest_is_priv, cur_addr_num, fam, ro);
3035 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3037 atomic_add_int(&sctp_ifa->refcount, 1);
3039 /* save off where the next one we will want */
3040 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3045 * plan_b: Look at all interfaces and find a preferred address. If
3046 * no preferred fall through to plan_c.
3049 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3050 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3051 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3052 sctp_ifn->ifn_name);
3053 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3054 /* wrong base scope */
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3058 if ((sctp_ifn == looked_at) && looked_at) {
3059 /* already looked at this guy */
3060 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3063 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3064 dest_is_loop, dest_is_priv, fam);
3065 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3066 "Found ifn:%p %d preferred source addresses\n",
3067 ifn, num_preferred);
3068 if (num_preferred == 0) {
3069 /* None on this interface. */
3070 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3073 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3074 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3075 num_preferred, (void *)sctp_ifn, cur_addr_num);
3078 * Ok we have num_eligible_addr set with how many we can
3079 * use, this may vary from call to call due to addresses
3080 * being deprecated etc..
3082 if (cur_addr_num >= num_preferred) {
3085 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3086 dest_is_priv, cur_addr_num, fam, ro);
3090 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3091 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3093 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3094 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3096 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3098 atomic_add_int(&sifa->refcount, 1);
3102 again_with_private_addresses_allowed:
3104 /* plan_c: do we have an acceptable address on the emit interface */
3106 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3107 if (emit_ifn == NULL) {
3108 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3111 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3114 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3115 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3116 &sctp_ifa->address.sin.sin_addr) != 0)) {
3117 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3122 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3123 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3124 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3125 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3129 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3130 (non_asoc_addr_ok == 0)) {
3131 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3134 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3137 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3141 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3142 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3146 if (((non_asoc_addr_ok == 0) &&
3147 (sctp_is_addr_restricted(stcb, sifa))) ||
3148 (non_asoc_addr_ok &&
3149 (sctp_is_addr_restricted(stcb, sifa)) &&
3150 (!sctp_is_addr_pending(stcb, sifa)))) {
3152 * It is restricted for some reason..
3153 * probably not yet added.
3155 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3160 atomic_add_int(&sifa->refcount, 1);
3165 * plan_d: We are in trouble. No preferred address on the emit
3166 * interface. And not even a preferred address on all interfaces. Go
3167 * out and see if we can find an acceptable address somewhere
3168 * amongst all interfaces.
3170 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3171 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3172 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3173 /* wrong base scope */
3176 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3178 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3179 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3180 &sctp_ifa->address.sin.sin_addr) != 0)) {
3185 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3186 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3187 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3191 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3192 (non_asoc_addr_ok == 0))
3194 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3200 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3204 if (((non_asoc_addr_ok == 0) &&
3205 (sctp_is_addr_restricted(stcb, sifa))) ||
3206 (non_asoc_addr_ok &&
3207 (sctp_is_addr_restricted(stcb, sifa)) &&
3208 (!sctp_is_addr_pending(stcb, sifa)))) {
3210 * It is restricted for some
3211 * reason.. probably not yet added.
3222 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3223 stcb->asoc.scope.ipv4_local_scope = 1;
3225 goto again_with_private_addresses_allowed;
3226 } else if (retried == 1) {
3227 stcb->asoc.scope.ipv4_local_scope = 0;
3235 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3236 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3237 /* wrong base scope */
3240 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3241 struct sctp_ifa *tmp_sifa;
3244 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3245 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3246 &sctp_ifa->address.sin.sin_addr) != 0)) {
3251 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3252 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3253 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3257 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3258 (non_asoc_addr_ok == 0))
3260 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3263 if (tmp_sifa == NULL) {
3266 if (tmp_sifa == sifa) {
3270 if (sctp_is_address_in_scope(tmp_sifa,
3271 &stcb->asoc.scope, 0) == 0) {
3274 if (((non_asoc_addr_ok == 0) &&
3275 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3276 (non_asoc_addr_ok &&
3277 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3278 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3288 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3289 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3290 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3295 atomic_add_int(&sifa->refcount, 1);
3303 /* tcb may be NULL */
3305 sctp_source_address_selection(struct sctp_inpcb *inp,
3306 struct sctp_tcb *stcb,
3308 struct sctp_nets *net,
3309 int non_asoc_addr_ok, uint32_t vrf_id)
3311 struct sctp_ifa *answer;
3312 uint8_t dest_is_priv, dest_is_loop;
3315 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3318 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3323 * - Find the route if needed, cache if I can.
3324 * - Look at interface address in route, Is it in the bound list. If so we
3325 * have the best source.
3326 * - If not we must rotate amongst the addresses.
3330 * Do we need to pay attention to scope. We can have a private address
3331 * or a global address we are sourcing or sending to. So if we draw
3333 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3335 * ------------------------------------------
3336 * source * dest * result
3337 * -----------------------------------------
3338 * <a> Private * Global * NAT
3339 * -----------------------------------------
3340 * <b> Private * Private * No problem
3341 * -----------------------------------------
3342 * <c> Global * Private * Huh, How will this work?
3343 * -----------------------------------------
3344 * <d> Global * Global * No Problem
3345 *------------------------------------------
3346 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3348 *------------------------------------------
3349 * source * dest * result
3350 * -----------------------------------------
3351 * <a> Linklocal * Global *
3352 * -----------------------------------------
3353 * <b> Linklocal * Linklocal * No problem
3354 * -----------------------------------------
3355 * <c> Global * Linklocal * Huh, How will this work?
3356 * -----------------------------------------
3357 * <d> Global * Global * No Problem
3358 *------------------------------------------
3359 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3361 * And then we add to that what happens if there are multiple addresses
3362 * assigned to an interface. Remember the ifa on a ifn is a linked
3363 * list of addresses. So one interface can have more than one IP
3364 * address. What happens if we have both a private and a global
3365 * address? Do we then use context of destination to sort out which
3366 * one is best? And what about NAT's sending P->G may get you a NAT
3367 * translation, or should you select the G thats on the interface in
3372 * - count the number of addresses on the interface.
3373 * - if it is one, no problem except case <c>.
3374 * For <a> we will assume a NAT out there.
3375 * - if there are more than one, then we need to worry about scope P
3376 * or G. We should prefer G -> G and P -> P if possible.
3377 * Then as a secondary fall back to mixed types G->P being a last
3379 * - The above all works for bound all, but bound specific we need to
3380 * use the same concept but instead only consider the bound
3381 * addresses. If the bound set is NOT assigned to the interface then
3382 * we must use rotation amongst the bound addresses..
3384 if (ro->ro_rt == NULL) {
3386 * Need a route to cache.
3388 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3390 if (ro->ro_rt == NULL) {
3393 fam = ro->ro_dst.sa_family;
3394 dest_is_priv = dest_is_loop = 0;
3395 /* Setup our scopes for the destination */
3399 /* Scope based on outbound address */
3400 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3403 /* mark it as local */
3404 net->addr_is_local = 1;
3406 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3413 /* Scope based on outbound address */
3414 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3415 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3417 * If the address is a loopback address, which
3418 * consists of "::1" OR "fe80::1%lo0", we are
3419 * loopback scope. But we don't use dest_is_priv
3420 * (link local addresses).
3424 /* mark it as local */
3425 net->addr_is_local = 1;
3427 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3433 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3434 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3435 SCTP_IPI_ADDR_RLOCK();
3436 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3440 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3441 dest_is_priv, dest_is_loop,
3442 non_asoc_addr_ok, fam);
3443 SCTP_IPI_ADDR_RUNLOCK();
3450 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3451 vrf_id, dest_is_priv,
3453 non_asoc_addr_ok, fam);
3455 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3460 SCTP_IPI_ADDR_RUNLOCK();
3465 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3468 int tlen, at, found;
3469 struct sctp_sndinfo sndinfo;
3470 struct sctp_prinfo prinfo;
3471 struct sctp_authinfo authinfo;
3473 tlen = SCTP_BUF_LEN(control);
3477 * Independent of how many mbufs, find the c_type inside the control
3478 * structure and copy out the data.
3481 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3482 /* There is not enough room for one more. */
3485 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3486 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3487 /* We dont't have a complete CMSG header. */
3490 if (((int)cmh.cmsg_len + at) > tlen) {
3491 /* We don't have the complete CMSG. */
3494 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3495 ((c_type == cmh.cmsg_type) ||
3496 ((c_type == SCTP_SNDRCV) &&
3497 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3498 (cmh.cmsg_type == SCTP_PRINFO) ||
3499 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3500 if (c_type == cmh.cmsg_type) {
3501 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3504 /* It is exactly what we want. Copy it out. */
3505 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), (int)cpsize, (caddr_t)data);
3508 struct sctp_sndrcvinfo *sndrcvinfo;
3510 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3512 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3515 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3517 switch (cmh.cmsg_type) {
3519 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3522 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3523 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3524 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3525 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3526 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3527 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3530 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3533 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3534 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3535 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3537 sndrcvinfo->sinfo_timetolive = 0;
3539 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3542 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3545 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3546 sndrcvinfo->sinfo_keynumber_valid = 1;
3547 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3555 at += CMSG_ALIGN(cmh.cmsg_len);
3561 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3565 struct sctp_initmsg initmsg;
3567 struct sockaddr_in sin;
3570 struct sockaddr_in6 sin6;
3573 tlen = SCTP_BUF_LEN(control);
3576 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3577 /* There is not enough room for one more. */
3581 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3582 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3583 /* We dont't have a complete CMSG header. */
3587 if (((int)cmh.cmsg_len + at) > tlen) {
3588 /* We don't have the complete CMSG. */
3592 if (cmh.cmsg_level == IPPROTO_SCTP) {
3593 switch (cmh.cmsg_type) {
3595 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3599 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3600 if (initmsg.sinit_max_attempts)
3601 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3602 if (initmsg.sinit_num_ostreams)
3603 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3604 if (initmsg.sinit_max_instreams)
3605 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3606 if (initmsg.sinit_max_init_timeo)
3607 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3608 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3609 struct sctp_stream_out *tmp_str;
3611 #if defined(SCTP_DETAILED_STR_STATS)
3615 /* Default is NOT correct */
3616 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3617 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3618 SCTP_TCB_UNLOCK(stcb);
3619 SCTP_MALLOC(tmp_str,
3620 struct sctp_stream_out *,
3621 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3623 SCTP_TCB_LOCK(stcb);
3624 if (tmp_str != NULL) {
3625 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3626 stcb->asoc.strmout = tmp_str;
3627 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3629 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3631 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3632 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3633 stcb->asoc.strmout[i].chunks_on_queues = 0;
3634 stcb->asoc.strmout[i].next_mid_ordered = 0;
3635 stcb->asoc.strmout[i].next_mid_unordered = 0;
3636 #if defined(SCTP_DETAILED_STR_STATS)
3637 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3638 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3639 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3642 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3643 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3645 stcb->asoc.strmout[i].sid = i;
3646 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3647 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3648 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3653 case SCTP_DSTADDRV4:
3654 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3658 memset(&sin, 0, sizeof(struct sockaddr_in));
3659 sin.sin_family = AF_INET;
3660 sin.sin_len = sizeof(struct sockaddr_in);
3661 sin.sin_port = stcb->rport;
3662 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3663 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3664 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3665 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3669 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3670 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3677 case SCTP_DSTADDRV6:
3678 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3682 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3683 sin6.sin6_family = AF_INET6;
3684 sin6.sin6_len = sizeof(struct sockaddr_in6);
3685 sin6.sin6_port = stcb->rport;
3686 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3687 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3688 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3693 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3694 in6_sin6_2_sin(&sin, &sin6);
3695 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3696 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3697 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3701 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3702 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3708 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3709 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3719 at += CMSG_ALIGN(cmh.cmsg_len);
3724 static struct sctp_tcb *
3725 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3727 struct mbuf *control,
3728 struct sctp_nets **net_p,
3733 struct sctp_tcb *stcb;
3734 struct sockaddr *addr;
3736 struct sockaddr_in sin;
3739 struct sockaddr_in6 sin6;
3742 tlen = SCTP_BUF_LEN(control);
3745 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3746 /* There is not enough room for one more. */
3750 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3751 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3752 /* We dont't have a complete CMSG header. */
3756 if (((int)cmh.cmsg_len + at) > tlen) {
3757 /* We don't have the complete CMSG. */
3761 if (cmh.cmsg_level == IPPROTO_SCTP) {
3762 switch (cmh.cmsg_type) {
3764 case SCTP_DSTADDRV4:
3765 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3769 memset(&sin, 0, sizeof(struct sockaddr_in));
3770 sin.sin_family = AF_INET;
3771 sin.sin_len = sizeof(struct sockaddr_in);
3772 sin.sin_port = port;
3773 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3774 addr = (struct sockaddr *)&sin;
3778 case SCTP_DSTADDRV6:
3779 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3783 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3784 sin6.sin6_family = AF_INET6;
3785 sin6.sin6_len = sizeof(struct sockaddr_in6);
3786 sin6.sin6_port = port;
3787 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3789 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3790 in6_sin6_2_sin(&sin, &sin6);
3791 addr = (struct sockaddr *)&sin;
3794 addr = (struct sockaddr *)&sin6;
3802 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3808 at += CMSG_ALIGN(cmh.cmsg_len);
3813 static struct mbuf *
3814 sctp_add_cookie(struct mbuf *init, int init_offset,
3815 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t **signature)
3817 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3818 struct sctp_state_cookie *stc;
3819 struct sctp_paramhdr *ph;
3824 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3825 sizeof(struct sctp_paramhdr)), 0,
3826 M_NOWAIT, 1, MT_DATA);
3830 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3831 if (copy_init == NULL) {
3835 #ifdef SCTP_MBUF_LOGGING
3836 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3837 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3840 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3842 if (copy_initack == NULL) {
3844 sctp_m_freem(copy_init);
3847 #ifdef SCTP_MBUF_LOGGING
3848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3849 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3852 /* easy side we just drop it on the end */
3853 ph = mtod(mret, struct sctp_paramhdr *);
3854 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3855 sizeof(struct sctp_paramhdr);
3856 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3857 sizeof(struct sctp_paramhdr));
3858 ph->param_type = htons(SCTP_STATE_COOKIE);
3859 ph->param_length = 0; /* fill in at the end */
3860 /* Fill in the stc cookie data */
3861 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3863 /* tack the INIT and then the INIT-ACK onto the chain */
3865 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3866 cookie_sz += SCTP_BUF_LEN(m_at);
3867 if (SCTP_BUF_NEXT(m_at) == NULL) {
3868 SCTP_BUF_NEXT(m_at) = copy_init;
3872 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3873 cookie_sz += SCTP_BUF_LEN(m_at);
3874 if (SCTP_BUF_NEXT(m_at) == NULL) {
3875 SCTP_BUF_NEXT(m_at) = copy_initack;
3879 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3880 cookie_sz += SCTP_BUF_LEN(m_at);
3881 if (SCTP_BUF_NEXT(m_at) == NULL) {
3885 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3887 /* no space, so free the entire chain */
3891 SCTP_BUF_LEN(sig) = 0;
3892 SCTP_BUF_NEXT(m_at) = sig;
3894 foo = (uint8_t *)(mtod(sig, caddr_t)+sig_offset);
3895 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3897 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3898 cookie_sz += SCTP_SIGNATURE_SIZE;
3899 ph->param_length = htons(cookie_sz);
3905 sctp_get_ect(struct sctp_tcb *stcb)
3907 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3908 return (SCTP_ECT0_BIT);
3914 #if defined(INET) || defined(INET6)
3916 sctp_handle_no_route(struct sctp_tcb *stcb,
3917 struct sctp_nets *net,
3920 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3923 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3924 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3925 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3926 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3927 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3928 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3932 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3933 net->dest_state &= ~SCTP_ADDR_PF;
3937 if (net == stcb->asoc.primary_destination) {
3938 /* need a new primary */
3939 struct sctp_nets *alt;
3941 alt = sctp_find_alternate_net(stcb, net, 0);
3943 if (stcb->asoc.alternate) {
3944 sctp_free_remote_addr(stcb->asoc.alternate);
3946 stcb->asoc.alternate = alt;
3947 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3948 if (net->ro._s_addr) {
3949 sctp_free_ifa(net->ro._s_addr);
3950 net->ro._s_addr = NULL;
3952 net->src_addr_selected = 0;
3961 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3962 struct sctp_tcb *stcb, /* may be NULL */
3963 struct sctp_nets *net,
3964 struct sockaddr *to,
3966 uint32_t auth_offset,
3967 struct sctp_auth_chunk *auth,
3968 uint16_t auth_keyid,
3969 int nofragment_flag,
3976 union sctp_sockstore *over_addr,
3977 uint8_t mflowtype, uint32_t mflowid,
3978 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3979 int so_locked SCTP_UNUSED
3984 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3987 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3988 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3989 * - fill in the HMAC digest of any AUTH chunk in the packet.
3990 * - calculate and fill in the SCTP checksum.
3991 * - prepend an IP address header.
3992 * - if boundall use INADDR_ANY.
3993 * - if boundspecific do source address selection.
3994 * - set fragmentation option for ipV4.
3995 * - On return from IP output, check/adjust mtu size of output
3996 * interface and smallest_mtu size as well.
3998 /* Will need ifdefs around this */
4000 struct sctphdr *sctphdr;
4003 #if defined(INET) || defined(INET6)
4006 #if defined(INET) || defined(INET6)
4008 sctp_route_t *ro = NULL;
4009 struct udphdr *udp = NULL;
4012 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4013 struct socket *so = NULL;
4016 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4017 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4021 #if defined(INET) || defined(INET6)
4023 vrf_id = stcb->asoc.vrf_id;
4025 vrf_id = inp->def_vrf_id;
4028 /* fill in the HMAC digest for any AUTH chunk in the packet */
4029 if ((auth != NULL) && (stcb != NULL)) {
4030 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4033 tos_value = net->dscp;
4035 tos_value = stcb->asoc.default_dscp;
4037 tos_value = inp->sctp_ep.default_dscp;
4040 switch (to->sa_family) {
4044 struct ip *ip = NULL;
4045 sctp_route_t iproute;
4048 len = SCTP_MIN_V4_OVERHEAD;
4050 len += sizeof(struct udphdr);
4052 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4055 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4058 SCTP_ALIGN_TO_END(newm, len);
4059 SCTP_BUF_LEN(newm) = len;
4060 SCTP_BUF_NEXT(newm) = m;
4063 m->m_pkthdr.flowid = net->flowid;
4064 M_HASHTYPE_SET(m, net->flowtype);
4066 m->m_pkthdr.flowid = mflowid;
4067 M_HASHTYPE_SET(m, mflowtype);
4069 packet_length = sctp_calculate_len(m);
4070 ip = mtod(m, struct ip *);
4071 ip->ip_v = IPVERSION;
4072 ip->ip_hl = (sizeof(struct ip) >> 2);
4073 if (tos_value == 0) {
4075 * This means especially, that it is not set
4076 * at the SCTP layer. So use the value from
4079 tos_value = inp->ip_inp.inp.inp_ip_tos;
4083 tos_value |= sctp_get_ect(stcb);
4085 if ((nofragment_flag) && (port == 0)) {
4086 ip->ip_off = htons(IP_DF);
4088 ip->ip_off = htons(0);
4090 /* FreeBSD has a function for ip_id's */
4093 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4094 ip->ip_len = htons(packet_length);
4095 ip->ip_tos = tos_value;
4097 ip->ip_p = IPPROTO_UDP;
4099 ip->ip_p = IPPROTO_SCTP;
4104 memset(&iproute, 0, sizeof(iproute));
4105 memcpy(&ro->ro_dst, to, to->sa_len);
4107 ro = (sctp_route_t *)&net->ro;
4109 /* Now the address selection part */
4110 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4112 /* call the routine to select the src address */
4113 if (net && out_of_asoc_ok == 0) {
4114 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4115 sctp_free_ifa(net->ro._s_addr);
4116 net->ro._s_addr = NULL;
4117 net->src_addr_selected = 0;
4123 if (net->src_addr_selected == 0) {
4124 /* Cache the source address */
4125 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4128 net->src_addr_selected = 1;
4130 if (net->ro._s_addr == NULL) {
4131 /* No route to host */
4132 net->src_addr_selected = 0;
4133 sctp_handle_no_route(stcb, net, so_locked);
4134 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4136 return (EHOSTUNREACH);
4138 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4140 if (over_addr == NULL) {
4141 struct sctp_ifa *_lsrc;
4143 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4147 if (_lsrc == NULL) {
4148 sctp_handle_no_route(stcb, net, so_locked);
4149 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4151 return (EHOSTUNREACH);
4153 ip->ip_src = _lsrc->address.sin.sin_addr;
4154 sctp_free_ifa(_lsrc);
4156 ip->ip_src = over_addr->sin.sin_addr;
4157 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4161 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4162 sctp_handle_no_route(stcb, net, so_locked);
4163 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4165 return (EHOSTUNREACH);
4167 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4168 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4169 udp->uh_dport = port;
4170 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip)));
4172 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4176 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4178 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4181 sctphdr->src_port = src_port;
4182 sctphdr->dest_port = dest_port;
4183 sctphdr->v_tag = v_tag;
4184 sctphdr->checksum = 0;
4187 * If source address selection fails and we find no
4188 * route then the ip_output should fail as well with
4189 * a NO_ROUTE_TO_HOST type error. We probably should
4190 * catch that somewhere and abort the association
4191 * right away (assuming this is an INIT being sent).
4193 if (ro->ro_rt == NULL) {
4195 * src addr selection failed to find a route
4196 * (or valid source addr), so we can't get
4197 * there from here (yet)!
4199 sctp_handle_no_route(stcb, net, so_locked);
4200 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4202 return (EHOSTUNREACH);
4204 if (ro != &iproute) {
4205 memcpy(&iproute, ro, sizeof(*ro));
4207 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4208 (uint32_t)(ntohl(ip->ip_src.s_addr)));
4209 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4210 (uint32_t)(ntohl(ip->ip_dst.s_addr)));
4211 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4214 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4215 /* failed to prepend data, give up */
4216 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4220 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4222 #if defined(SCTP_WITH_NO_CSUM)
4223 SCTP_STAT_INCR(sctps_sendnocrc);
4225 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4226 SCTP_STAT_INCR(sctps_sendswcrc);
4229 SCTP_ENABLE_UDP_CSUM(o_pak);
4232 #if defined(SCTP_WITH_NO_CSUM)
4233 SCTP_STAT_INCR(sctps_sendnocrc);
4235 m->m_pkthdr.csum_flags = CSUM_SCTP;
4236 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4237 SCTP_STAT_INCR(sctps_sendhwcrc);
4240 #ifdef SCTP_PACKET_LOGGING
4241 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4242 sctp_packet_log(o_pak);
4244 /* send it out. table id is taken from stcb */
4245 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4246 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4247 so = SCTP_INP_SO(inp);
4248 SCTP_SOCKET_UNLOCK(so, 0);
4251 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4252 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4253 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4254 atomic_add_int(&stcb->asoc.refcnt, 1);
4255 SCTP_TCB_UNLOCK(stcb);
4256 SCTP_SOCKET_LOCK(so, 0);
4257 SCTP_TCB_LOCK(stcb);
4258 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4261 SCTP_STAT_INCR(sctps_sendpackets);
4262 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4264 SCTP_STAT_INCR(sctps_senderrors);
4266 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4268 /* free tempy routes */
4272 * PMTU check versus smallest asoc MTU goes
4275 if ((ro->ro_rt != NULL) &&
4276 (net->ro._s_addr)) {
4279 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4281 mtu -= sizeof(struct udphdr);
4283 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4284 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4287 } else if (ro->ro_rt == NULL) {
4288 /* route was freed */
4289 if (net->ro._s_addr &&
4290 net->src_addr_selected) {
4291 sctp_free_ifa(net->ro._s_addr);
4292 net->ro._s_addr = NULL;
4294 net->src_addr_selected = 0;
4303 uint32_t flowlabel, flowinfo;
4304 struct ip6_hdr *ip6h;
4305 struct route_in6 ip6route;
4307 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4309 struct sockaddr_in6 lsa6_storage;
4311 u_short prev_port = 0;
4315 flowlabel = net->flowlabel;
4317 flowlabel = stcb->asoc.default_flowlabel;
4319 flowlabel = inp->sctp_ep.default_flowlabel;
4321 if (flowlabel == 0) {
4323 * This means especially, that it is not set
4324 * at the SCTP layer. So use the value from
4327 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4329 flowlabel &= 0x000fffff;
4330 len = SCTP_MIN_OVERHEAD;
4332 len += sizeof(struct udphdr);
4334 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4337 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4340 SCTP_ALIGN_TO_END(newm, len);
4341 SCTP_BUF_LEN(newm) = len;
4342 SCTP_BUF_NEXT(newm) = m;
4345 m->m_pkthdr.flowid = net->flowid;
4346 M_HASHTYPE_SET(m, net->flowtype);
4348 m->m_pkthdr.flowid = mflowid;
4349 M_HASHTYPE_SET(m, mflowtype);
4351 packet_length = sctp_calculate_len(m);
4353 ip6h = mtod(m, struct ip6_hdr *);
4354 /* protect *sin6 from overwrite */
4355 sin6 = (struct sockaddr_in6 *)to;
4359 /* KAME hack: embed scopeid */
4360 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4361 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4365 memset(&ip6route, 0, sizeof(ip6route));
4366 ro = (sctp_route_t *)&ip6route;
4367 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4369 ro = (sctp_route_t *)&net->ro;
4372 * We assume here that inp_flow is in host byte
4373 * order within the TCB!
4375 if (tos_value == 0) {
4377 * This means especially, that it is not set
4378 * at the SCTP layer. So use the value from
4381 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4385 tos_value |= sctp_get_ect(stcb);
4389 flowinfo |= tos_value;
4391 flowinfo |= flowlabel;
4392 ip6h->ip6_flow = htonl(flowinfo);
4394 ip6h->ip6_nxt = IPPROTO_UDP;
4396 ip6h->ip6_nxt = IPPROTO_SCTP;
4398 ip6h->ip6_plen = (uint16_t)(packet_length - sizeof(struct ip6_hdr));
4399 ip6h->ip6_dst = sin6->sin6_addr;
4402 * Add SRC address selection here: we can only reuse
4403 * to a limited degree the kame src-addr-sel, since
4404 * we can try their selection but it may not be
4407 memset(&lsa6_tmp, 0, sizeof(lsa6_tmp));
4408 lsa6_tmp.sin6_family = AF_INET6;
4409 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4411 if (net && out_of_asoc_ok == 0) {
4412 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4413 sctp_free_ifa(net->ro._s_addr);
4414 net->ro._s_addr = NULL;
4415 net->src_addr_selected = 0;
4421 if (net->src_addr_selected == 0) {
4422 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4423 /* KAME hack: embed scopeid */
4424 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4425 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4428 /* Cache the source address */
4429 net->ro._s_addr = sctp_source_address_selection(inp,
4435 (void)sa6_recoverscope(sin6);
4436 net->src_addr_selected = 1;
4438 if (net->ro._s_addr == NULL) {
4439 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4440 net->src_addr_selected = 0;
4441 sctp_handle_no_route(stcb, net, so_locked);
4442 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4444 return (EHOSTUNREACH);
4446 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4448 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4449 /* KAME hack: embed scopeid */
4450 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4451 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4454 if (over_addr == NULL) {
4455 struct sctp_ifa *_lsrc;
4457 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4461 if (_lsrc == NULL) {
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 = _lsrc->address.sin6.sin6_addr;
4468 sctp_free_ifa(_lsrc);
4470 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4471 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4473 (void)sa6_recoverscope(sin6);
4475 lsa6->sin6_port = inp->sctp_lport;
4477 if (ro->ro_rt == NULL) {
4479 * src addr selection failed to find a route
4480 * (or valid source addr), so we can't get
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);
4489 * XXX: sa6 may not have a valid sin6_scope_id in
4490 * the non-SCOPEDROUTING case.
4492 memset(&lsa6_storage, 0, sizeof(lsa6_storage));
4493 lsa6_storage.sin6_family = AF_INET6;
4494 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4495 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4496 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4497 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4502 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4503 lsa6_storage.sin6_port = inp->sctp_lport;
4504 lsa6 = &lsa6_storage;
4505 ip6h->ip6_src = lsa6->sin6_addr;
4508 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4509 sctp_handle_no_route(stcb, net, so_locked);
4510 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4512 return (EHOSTUNREACH);
4514 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4515 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4516 udp->uh_dport = port;
4517 udp->uh_ulen = htons((uint16_t)(packet_length - sizeof(struct ip6_hdr)));
4519 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4521 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4524 sctphdr->src_port = src_port;
4525 sctphdr->dest_port = dest_port;
4526 sctphdr->v_tag = v_tag;
4527 sctphdr->checksum = 0;
4530 * We set the hop limit now since there is a good
4531 * chance that our ro pointer is now filled
4533 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4534 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4537 /* Copy to be sure something bad is not happening */
4538 sin6->sin6_addr = ip6h->ip6_dst;
4539 lsa6->sin6_addr = ip6h->ip6_src;
4542 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4543 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4544 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4545 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4546 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4548 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4550 * preserve the port and scope for link
4553 prev_scope = sin6->sin6_scope_id;
4554 prev_port = sin6->sin6_port;
4556 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4557 /* failed to prepend data, give up */
4559 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4562 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4564 #if defined(SCTP_WITH_NO_CSUM)
4565 SCTP_STAT_INCR(sctps_sendnocrc);
4567 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4568 SCTP_STAT_INCR(sctps_sendswcrc);
4570 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4571 udp->uh_sum = 0xffff;
4574 #if defined(SCTP_WITH_NO_CSUM)
4575 SCTP_STAT_INCR(sctps_sendnocrc);
4577 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4578 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4579 SCTP_STAT_INCR(sctps_sendhwcrc);
4582 /* send it out. table id is taken from stcb */
4583 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4584 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4585 so = SCTP_INP_SO(inp);
4586 SCTP_SOCKET_UNLOCK(so, 0);
4589 #ifdef SCTP_PACKET_LOGGING
4590 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4591 sctp_packet_log(o_pak);
4593 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4594 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4595 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4596 atomic_add_int(&stcb->asoc.refcnt, 1);
4597 SCTP_TCB_UNLOCK(stcb);
4598 SCTP_SOCKET_LOCK(so, 0);
4599 SCTP_TCB_LOCK(stcb);
4600 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4604 /* for link local this must be done */
4605 sin6->sin6_scope_id = prev_scope;
4606 sin6->sin6_port = prev_port;
4608 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4609 SCTP_STAT_INCR(sctps_sendpackets);
4610 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4612 SCTP_STAT_INCR(sctps_senderrors);
4615 /* Now if we had a temp route free it */
4619 * PMTU check versus smallest asoc MTU goes
4622 if (ro->ro_rt == NULL) {
4623 /* Route was freed */
4624 if (net->ro._s_addr &&
4625 net->src_addr_selected) {
4626 sctp_free_ifa(net->ro._s_addr);
4627 net->ro._s_addr = NULL;
4629 net->src_addr_selected = 0;
4631 if ((ro->ro_rt != NULL) &&
4632 (net->ro._s_addr)) {
4635 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4637 (stcb->asoc.smallest_mtu > mtu)) {
4638 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4641 net->mtu -= sizeof(struct udphdr);
4645 if (ND_IFINFO(ifp)->linkmtu &&
4646 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4647 sctp_mtu_size_reset(inp,
4649 ND_IFINFO(ifp)->linkmtu);
4657 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4658 ((struct sockaddr *)to)->sa_family);
4660 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4667 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4668 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4673 struct mbuf *m, *m_last;
4674 struct sctp_nets *net;
4675 struct sctp_init_chunk *init;
4676 struct sctp_supported_addr_param *sup_addr;
4677 struct sctp_adaptation_layer_indication *ali;
4678 struct sctp_supported_chunk_types_param *pr_supported;
4679 struct sctp_paramhdr *ph;
4680 int cnt_inits_to = 0;
4682 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4684 /* INIT's always go to the primary (and usually ONLY address) */
4685 net = stcb->asoc.primary_destination;
4687 net = TAILQ_FIRST(&stcb->asoc.nets);
4692 /* we confirm any address we send an INIT to */
4693 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4694 (void)sctp_set_primary_addr(stcb, NULL, net);
4696 /* we confirm any address we send an INIT to */
4697 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4699 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4701 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4703 * special hook, if we are sending to link local it will not
4704 * show up in our private address count.
4706 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4710 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4711 /* This case should not happen */
4712 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4715 /* start the INIT timer */
4716 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4718 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4720 /* No memory, INIT timer will re-attempt. */
4721 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4724 chunk_len = (uint16_t)sizeof(struct sctp_init_chunk);
4726 /* Now lets put the chunk header in place */
4727 init = mtod(m, struct sctp_init_chunk *);
4728 /* now the chunk header */
4729 init->ch.chunk_type = SCTP_INITIATION;
4730 init->ch.chunk_flags = 0;
4731 /* fill in later from mbuf we build */
4732 init->ch.chunk_length = 0;
4733 /* place in my tag */
4734 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4735 /* set up some of the credits. */
4736 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4737 SCTP_MINIMAL_RWND));
4738 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4739 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4740 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4742 /* Adaptation layer indication parameter */
4743 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4744 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
4745 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4746 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4747 ali->ph.param_length = htons(parameter_len);
4748 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4749 chunk_len += parameter_len;
4752 if (stcb->asoc.ecn_supported == 1) {
4753 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4754 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4755 ph->param_type = htons(SCTP_ECN_CAPABLE);
4756 ph->param_length = htons(parameter_len);
4757 chunk_len += parameter_len;
4759 /* PR-SCTP supported parameter */
4760 if (stcb->asoc.prsctp_supported == 1) {
4761 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4762 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4763 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4764 ph->param_length = htons(parameter_len);
4765 chunk_len += parameter_len;
4767 /* Add NAT friendly parameter. */
4768 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4769 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4771 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4772 ph->param_length = htons(parameter_len);
4773 chunk_len += parameter_len;
4775 /* And now tell the peer which extensions we support */
4777 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4778 if (stcb->asoc.prsctp_supported == 1) {
4779 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4780 if (stcb->asoc.idata_supported) {
4781 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4784 if (stcb->asoc.auth_supported == 1) {
4785 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4787 if (stcb->asoc.asconf_supported == 1) {
4788 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4789 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4791 if (stcb->asoc.reconfig_supported == 1) {
4792 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4794 if (stcb->asoc.idata_supported) {
4795 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4797 if (stcb->asoc.nrsack_supported == 1) {
4798 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4800 if (stcb->asoc.pktdrop_supported == 1) {
4801 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4804 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4805 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4806 pr_supported->ph.param_length = htons(parameter_len);
4807 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4808 chunk_len += parameter_len;
4810 /* add authentication parameters */
4811 if (stcb->asoc.auth_supported) {
4812 /* attach RANDOM parameter, if available */
4813 if (stcb->asoc.authinfo.random != NULL) {
4814 struct sctp_auth_random *randp;
4816 if (padding_len > 0) {
4817 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4818 chunk_len += padding_len;
4821 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4822 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4823 /* random key already contains the header */
4824 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4825 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4826 chunk_len += parameter_len;
4828 /* add HMAC_ALGO parameter */
4829 if (stcb->asoc.local_hmacs != NULL) {
4830 struct sctp_auth_hmac_algo *hmacs;
4832 if (padding_len > 0) {
4833 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4834 chunk_len += padding_len;
4837 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4838 parameter_len = (uint16_t)(sizeof(struct sctp_auth_hmac_algo) +
4839 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4840 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4841 hmacs->ph.param_length = htons(parameter_len);
4842 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *)hmacs->hmac_ids);
4843 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4844 chunk_len += parameter_len;
4846 /* add CHUNKS parameter */
4847 if (stcb->asoc.local_auth_chunks != NULL) {
4848 struct sctp_auth_chunk_list *chunks;
4850 if (padding_len > 0) {
4851 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4852 chunk_len += padding_len;
4855 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4856 parameter_len = (uint16_t)(sizeof(struct sctp_auth_chunk_list) +
4857 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4858 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4859 chunks->ph.param_length = htons(parameter_len);
4860 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4861 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4862 chunk_len += parameter_len;
4865 /* now any cookie time extensions */
4866 if (stcb->asoc.cookie_preserve_req) {
4867 struct sctp_cookie_perserve_param *cookie_preserve;
4869 if (padding_len > 0) {
4870 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4871 chunk_len += padding_len;
4874 parameter_len = (uint16_t)sizeof(struct sctp_cookie_perserve_param);
4875 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4876 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4877 cookie_preserve->ph.param_length = htons(parameter_len);
4878 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4879 stcb->asoc.cookie_preserve_req = 0;
4880 chunk_len += parameter_len;
4882 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4885 if (padding_len > 0) {
4886 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4887 chunk_len += padding_len;
4890 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
4891 if (stcb->asoc.scope.ipv4_addr_legal) {
4892 parameter_len += (uint16_t)sizeof(uint16_t);
4894 if (stcb->asoc.scope.ipv6_addr_legal) {
4895 parameter_len += (uint16_t)sizeof(uint16_t);
4897 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4898 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4899 sup_addr->ph.param_length = htons(parameter_len);
4901 if (stcb->asoc.scope.ipv4_addr_legal) {
4902 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4904 if (stcb->asoc.scope.ipv6_addr_legal) {
4905 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4907 padding_len = 4 - 2 * i;
4908 chunk_len += parameter_len;
4910 SCTP_BUF_LEN(m) = chunk_len;
4911 /* now the addresses */
4913 * To optimize this we could put the scoping stuff into a structure
4914 * and remove the individual uint8's from the assoc structure. Then
4915 * we could just sifa in the address within the stcb. But for now
4916 * this is a quick hack to get the address stuff teased apart.
4918 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4920 &padding_len, &chunk_len);
4922 init->ch.chunk_length = htons(chunk_len);
4923 if (padding_len > 0) {
4924 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4929 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4930 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
4931 (struct sockaddr *)&net->ro._l_addr,
4932 m, 0, NULL, 0, 0, 0, 0,
4933 inp->sctp_lport, stcb->rport, htonl(0),
4937 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
4938 if (error == ENOBUFS) {
4939 stcb->asoc.ifp_had_enobuf = 1;
4940 SCTP_STAT_INCR(sctps_lowlevelerr);
4943 stcb->asoc.ifp_had_enobuf = 0;
4945 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4946 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4950 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4951 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4954 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4955 * being equal to the beginning of the params i.e. (iphlen +
4956 * sizeof(struct sctp_init_msg) parse through the parameters to the
4957 * end of the mbuf verifying that all parameters are known.
4959 * For unknown parameters build and return a mbuf with
4960 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4961 * processing this chunk stop, and set *abort_processing to 1.
4963 * By having param_offset be pre-set to where parameters begin it is
4964 * hoped that this routine may be reused in the future by new
4967 struct sctp_paramhdr *phdr, params;
4969 struct mbuf *mat, *op_err;
4970 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4971 int at, limit, pad_needed;
4972 uint16_t ptype, plen, padded_size;
4975 *abort_processing = 0;
4978 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4981 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4982 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4983 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4984 ptype = ntohs(phdr->param_type);
4985 plen = ntohs(phdr->param_length);
4986 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4987 /* wacked parameter */
4988 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4991 limit -= SCTP_SIZE32(plen);
4993 * All parameters for all chunks that we know/understand are
4994 * listed here. We process them other places and make
4995 * appropriate stop actions per the upper bits. However this
4996 * is the generic routine processor's can call to get back
4997 * an operr.. to either incorporate (init-ack) or send.
4999 padded_size = SCTP_SIZE32(plen);
5001 /* Param's with variable size */
5002 case SCTP_HEARTBEAT_INFO:
5003 case SCTP_STATE_COOKIE:
5004 case SCTP_UNRECOG_PARAM:
5005 case SCTP_ERROR_CAUSE_IND:
5009 /* Param's with variable size within a range */
5010 case SCTP_CHUNK_LIST:
5011 case SCTP_SUPPORTED_CHUNK_EXT:
5012 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5013 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5018 case SCTP_SUPPORTED_ADDRTYPE:
5019 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5020 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5026 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5027 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5032 case SCTP_SET_PRIM_ADDR:
5033 case SCTP_DEL_IP_ADDRESS:
5034 case SCTP_ADD_IP_ADDRESS:
5035 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5036 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5037 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5042 /* Param's with a fixed size */
5043 case SCTP_IPV4_ADDRESS:
5044 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5045 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5050 case SCTP_IPV6_ADDRESS:
5051 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5052 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5057 case SCTP_COOKIE_PRESERVE:
5058 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5064 case SCTP_HAS_NAT_SUPPORT:
5067 case SCTP_PRSCTP_SUPPORTED:
5068 if (padded_size != sizeof(struct sctp_paramhdr)) {
5069 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5074 case SCTP_ECN_CAPABLE:
5075 if (padded_size != sizeof(struct sctp_paramhdr)) {
5076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5081 case SCTP_ULP_ADAPTATION:
5082 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5083 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5088 case SCTP_SUCCESS_REPORT:
5089 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5095 case SCTP_HOSTNAME_ADDRESS:
5097 /* We can NOT handle HOST NAME addresses!! */
5100 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5101 *abort_processing = 1;
5102 if (op_err == NULL) {
5103 /* Ok need to try to get a mbuf */
5105 l_len = SCTP_MIN_OVERHEAD;
5107 l_len = SCTP_MIN_V4_OVERHEAD;
5109 l_len += sizeof(struct sctp_chunkhdr);
5111 l_len += sizeof(struct sctp_paramhdr);
5112 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5114 SCTP_BUF_LEN(op_err) = 0;
5116 * pre-reserve space for ip
5117 * and sctp header and
5121 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5123 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5125 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5130 /* If we have space */
5131 struct sctp_paramhdr s;
5134 uint32_t cpthis = 0;
5136 pad_needed = 4 - (err_at % 4);
5137 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5138 err_at += pad_needed;
5140 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5141 s.param_length = htons(sizeof(s) + plen);
5142 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5143 err_at += sizeof(s);
5144 if (plen > sizeof(tempbuf)) {
5145 plen = sizeof(tempbuf);
5147 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5149 sctp_m_freem(op_err);
5151 * we are out of memory but
5152 * we still need to have a
5153 * look at what to do (the
5154 * system is in trouble
5159 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5166 * we do not recognize the parameter figure out what
5169 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5170 if ((ptype & 0x4000) == 0x4000) {
5171 /* Report bit is set?? */
5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5173 if (op_err == NULL) {
5176 /* Ok need to try to get an mbuf */
5178 l_len = SCTP_MIN_OVERHEAD;
5180 l_len = SCTP_MIN_V4_OVERHEAD;
5182 l_len += sizeof(struct sctp_chunkhdr);
5184 l_len += sizeof(struct sctp_paramhdr);
5185 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5187 SCTP_BUF_LEN(op_err) = 0;
5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5198 /* If we have space */
5199 struct sctp_paramhdr s;
5202 uint32_t cpthis = 0;
5204 pad_needed = 4 - (err_at % 4);
5205 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5206 err_at += pad_needed;
5208 s.param_type = htons(SCTP_UNRECOG_PARAM);
5209 s.param_length = htons(sizeof(s) + plen);
5210 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5211 err_at += sizeof(s);
5212 if (plen > sizeof(tempbuf)) {
5213 plen = sizeof(tempbuf);
5215 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, plen);
5217 sctp_m_freem(op_err);
5219 * we are out of memory but
5220 * we still need to have a
5221 * look at what to do (the
5222 * system is in trouble
5226 goto more_processing;
5228 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5233 if ((ptype & 0x8000) == 0x0000) {
5234 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5237 /* skip this chunk and continue processing */
5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5239 at += SCTP_SIZE32(plen);
5244 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5249 *abort_processing = 1;
5250 if ((op_err == NULL) && phdr) {
5253 l_len = SCTP_MIN_OVERHEAD;
5255 l_len = SCTP_MIN_V4_OVERHEAD;
5257 l_len += sizeof(struct sctp_chunkhdr);
5258 l_len += (2 * sizeof(struct sctp_paramhdr));
5259 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5261 SCTP_BUF_LEN(op_err) = 0;
5263 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5265 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5271 if ((op_err) && phdr) {
5272 struct sctp_paramhdr s;
5275 uint32_t cpthis = 0;
5277 pad_needed = 4 - (err_at % 4);
5278 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5279 err_at += pad_needed;
5281 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5282 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5283 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5284 err_at += sizeof(s);
5285 /* Only copy back the p-hdr that caused the issue */
5286 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5292 sctp_are_there_new_addresses(struct sctp_association *asoc,
5293 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5296 * Given a INIT packet, look through the packet to verify that there
5297 * are NO new addresses. As we go through the parameters add reports
5298 * of any un-understood parameters that require an error. Also we
5299 * must return (1) to drop the packet if we see a un-understood
5300 * parameter that tells us to drop the chunk.
5302 struct sockaddr *sa_touse;
5303 struct sockaddr *sa;
5304 struct sctp_paramhdr *phdr, params;
5305 uint16_t ptype, plen;
5307 struct sctp_nets *net;
5310 struct sockaddr_in sin4, *sa4;
5313 struct sockaddr_in6 sin6, *sa6;
5317 memset(&sin4, 0, sizeof(sin4));
5318 sin4.sin_family = AF_INET;
5319 sin4.sin_len = sizeof(sin4);
5322 memset(&sin6, 0, sizeof(sin6));
5323 sin6.sin6_family = AF_INET6;
5324 sin6.sin6_len = sizeof(sin6);
5326 /* First what about the src address of the pkt ? */
5328 switch (src->sa_family) {
5331 if (asoc->scope.ipv4_addr_legal) {
5338 if (asoc->scope.ipv6_addr_legal) {
5349 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5350 sa = (struct sockaddr *)&net->ro._l_addr;
5351 if (sa->sa_family == src->sa_family) {
5353 if (sa->sa_family == AF_INET) {
5354 struct sockaddr_in *src4;
5356 sa4 = (struct sockaddr_in *)sa;
5357 src4 = (struct sockaddr_in *)src;
5358 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5365 if (sa->sa_family == AF_INET6) {
5366 struct sockaddr_in6 *src6;
5368 sa6 = (struct sockaddr_in6 *)sa;
5369 src6 = (struct sockaddr_in6 *)src;
5370 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5379 /* New address added! no need to look further. */
5383 /* Ok so far lets munge through the rest of the packet */
5384 offset += sizeof(struct sctp_init_chunk);
5385 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5388 ptype = ntohs(phdr->param_type);
5389 plen = ntohs(phdr->param_length);
5392 case SCTP_IPV4_ADDRESS:
5394 struct sctp_ipv4addr_param *p4, p4_buf;
5396 if (plen != sizeof(struct sctp_ipv4addr_param)) {
5399 phdr = sctp_get_next_param(in_initpkt, offset,
5400 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5404 if (asoc->scope.ipv4_addr_legal) {
5405 p4 = (struct sctp_ipv4addr_param *)phdr;
5406 sin4.sin_addr.s_addr = p4->addr;
5407 sa_touse = (struct sockaddr *)&sin4;
5413 case SCTP_IPV6_ADDRESS:
5415 struct sctp_ipv6addr_param *p6, p6_buf;
5417 if (plen != sizeof(struct sctp_ipv6addr_param)) {
5420 phdr = sctp_get_next_param(in_initpkt, offset,
5421 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5425 if (asoc->scope.ipv6_addr_legal) {
5426 p6 = (struct sctp_ipv6addr_param *)phdr;
5427 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5429 sa_touse = (struct sockaddr *)&sin6;
5439 /* ok, sa_touse points to one to check */
5441 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5442 sa = (struct sockaddr *)&net->ro._l_addr;
5443 if (sa->sa_family != sa_touse->sa_family) {
5447 if (sa->sa_family == AF_INET) {
5448 sa4 = (struct sockaddr_in *)sa;
5449 if (sa4->sin_addr.s_addr ==
5450 sin4.sin_addr.s_addr) {
5457 if (sa->sa_family == AF_INET6) {
5458 sa6 = (struct sockaddr_in6 *)sa;
5459 if (SCTP6_ARE_ADDR_EQUAL(
5468 /* New addr added! no need to look further */
5472 offset += SCTP_SIZE32(plen);
5473 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5479 * Given a MBUF chain that was sent into us containing an INIT. Build a
5480 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5481 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5482 * message (i.e. the struct sctp_init_msg).
5485 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5486 struct sctp_nets *src_net, struct mbuf *init_pkt,
5487 int iphlen, int offset,
5488 struct sockaddr *src, struct sockaddr *dst,
5489 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5490 uint8_t mflowtype, uint32_t mflowid,
5491 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5493 struct sctp_association *asoc;
5494 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5495 struct sctp_init_ack_chunk *initack;
5496 struct sctp_adaptation_layer_indication *ali;
5497 struct sctp_supported_chunk_types_param *pr_supported;
5498 struct sctp_paramhdr *ph;
5499 union sctp_sockstore *over_addr;
5500 struct sctp_scoping scp;
5502 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5503 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5504 struct sockaddr_in *sin;
5507 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5508 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5509 struct sockaddr_in6 *sin6;
5511 struct sockaddr *to;
5512 struct sctp_state_cookie stc;
5513 struct sctp_nets *net = NULL;
5514 uint8_t *signature = NULL;
5515 int cnt_inits_to = 0;
5516 uint16_t his_limit, i_want;
5518 int nat_friendly = 0;
5521 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5528 if ((asoc != NULL) &&
5529 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5530 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5532 * new addresses, out of here in non-cookie-wait
5535 * Send an ABORT, without the new address error
5536 * cause. This looks no different than if no
5537 * listener was present.
5539 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5541 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5542 mflowtype, mflowid, inp->fibnum,
5546 if (src_net != NULL && (src_net->port != port)) {
5548 * change of remote encapsulation port, out of here
5549 * in non-cookie-wait states
5551 * Send an ABORT, without an specific error cause.
5552 * This looks no different than if no listener was
5555 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5556 "Remote encapsulation port changed");
5557 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5558 mflowtype, mflowid, inp->fibnum,
5564 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5565 (offset + sizeof(struct sctp_init_chunk)),
5566 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5569 if (op_err == NULL) {
5570 char msg[SCTP_DIAG_INFO_LEN];
5572 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5573 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5576 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5577 init_chk->init.initiate_tag, op_err,
5578 mflowtype, mflowid, inp->fibnum,
5582 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5584 /* No memory, INIT timer will re-attempt. */
5586 sctp_m_freem(op_err);
5589 chunk_len = (uint16_t)sizeof(struct sctp_init_ack_chunk);
5593 * We might not overwrite the identification[] completely and on
5594 * some platforms time_entered will contain some padding. Therefore
5595 * zero out the cookie to avoid putting uninitialized memory on the
5598 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5600 /* the time I built cookie */
5601 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5603 /* populate any tie tags */
5605 /* unlock before tag selections */
5606 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5607 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5608 stc.cookie_life = asoc->cookie_life;
5609 net = asoc->primary_destination;
5611 stc.tie_tag_my_vtag = 0;
5612 stc.tie_tag_peer_vtag = 0;
5613 /* life I will award this cookie */
5614 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5617 /* copy in the ports for later check */
5618 stc.myport = sh->dest_port;
5619 stc.peerport = sh->src_port;
5622 * If we wanted to honor cookie life extensions, we would add to
5623 * stc.cookie_life. For now we should NOT honor any extension
5625 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5626 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5627 stc.ipv6_addr_legal = 1;
5628 if (SCTP_IPV6_V6ONLY(inp)) {
5629 stc.ipv4_addr_legal = 0;
5631 stc.ipv4_addr_legal = 1;
5634 stc.ipv6_addr_legal = 0;
5635 stc.ipv4_addr_legal = 1;
5640 switch (dst->sa_family) {
5644 /* lookup address */
5645 stc.address[0] = src4->sin_addr.s_addr;
5649 stc.addr_type = SCTP_IPV4_ADDRESS;
5650 /* local from address */
5651 stc.laddress[0] = dst4->sin_addr.s_addr;
5652 stc.laddress[1] = 0;
5653 stc.laddress[2] = 0;
5654 stc.laddress[3] = 0;
5655 stc.laddr_type = SCTP_IPV4_ADDRESS;
5656 /* scope_id is only for v6 */
5658 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5659 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5662 /* Must use the address in this case */
5663 if (sctp_is_address_on_local_host(src, vrf_id)) {
5664 stc.loopback_scope = 1;
5667 stc.local_scope = 0;
5675 stc.addr_type = SCTP_IPV6_ADDRESS;
5676 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5677 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5678 if (sctp_is_address_on_local_host(src, vrf_id)) {
5679 stc.loopback_scope = 1;
5680 stc.local_scope = 0;
5683 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5684 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5686 * If the new destination or source
5687 * is a LINK_LOCAL we must have
5688 * common both site and local scope.
5689 * Don't set local scope though
5690 * since we must depend on the
5691 * source to be added implicitly. We
5692 * cannot assure just because we
5693 * share one link that all links are
5696 stc.local_scope = 0;
5700 * we start counting for the private
5701 * address stuff at 1. since the
5702 * link local we source from won't
5703 * show up in our scoped count.
5707 * pull out the scope_id from
5710 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5711 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5713 * If the new destination or source
5714 * is SITE_LOCAL then we must have
5715 * site scope in common.
5719 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5720 stc.laddr_type = SCTP_IPV6_ADDRESS;
5730 /* set the scope per the existing tcb */
5733 struct sctp_nets *lnet;
5736 stc.loopback_scope = asoc->scope.loopback_scope;
5737 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5738 stc.site_scope = asoc->scope.site_scope;
5739 stc.local_scope = asoc->scope.local_scope;
5741 /* Why do we not consider IPv4 LL addresses? */
5742 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5743 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5744 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5746 * if we have a LL address, start
5754 /* use the net pointer */
5755 to = (struct sockaddr *)&net->ro._l_addr;
5756 switch (to->sa_family) {
5759 sin = (struct sockaddr_in *)to;
5760 stc.address[0] = sin->sin_addr.s_addr;
5764 stc.addr_type = SCTP_IPV4_ADDRESS;
5765 if (net->src_addr_selected == 0) {
5767 * strange case here, the INIT should have
5768 * did the selection.
5770 net->ro._s_addr = sctp_source_address_selection(inp,
5771 stcb, (sctp_route_t *)&net->ro,
5773 if (net->ro._s_addr == NULL)
5776 net->src_addr_selected = 1;
5779 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5780 stc.laddress[1] = 0;
5781 stc.laddress[2] = 0;
5782 stc.laddress[3] = 0;
5783 stc.laddr_type = SCTP_IPV4_ADDRESS;
5784 /* scope_id is only for v6 */
5790 sin6 = (struct sockaddr_in6 *)to;
5791 memcpy(&stc.address, &sin6->sin6_addr,
5792 sizeof(struct in6_addr));
5793 stc.addr_type = SCTP_IPV6_ADDRESS;
5794 stc.scope_id = sin6->sin6_scope_id;
5795 if (net->src_addr_selected == 0) {
5797 * strange case here, the INIT should have
5798 * done the selection.
5800 net->ro._s_addr = sctp_source_address_selection(inp,
5801 stcb, (sctp_route_t *)&net->ro,
5803 if (net->ro._s_addr == NULL)
5806 net->src_addr_selected = 1;
5808 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5809 sizeof(struct in6_addr));
5810 stc.laddr_type = SCTP_IPV6_ADDRESS;
5815 /* Now lets put the SCTP header in place */
5816 initack = mtod(m, struct sctp_init_ack_chunk *);
5817 /* Save it off for quick ref */
5818 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5820 memcpy(stc.identification, SCTP_VERSION_STRING,
5821 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5822 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5823 /* now the chunk header */
5824 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5825 initack->ch.chunk_flags = 0;
5826 /* fill in later from mbuf we build */
5827 initack->ch.chunk_length = 0;
5828 /* place in my tag */
5829 if ((asoc != NULL) &&
5830 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5831 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5832 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5833 /* re-use the v-tags and init-seq here */
5834 initack->init.initiate_tag = htonl(asoc->my_vtag);
5835 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5837 uint32_t vtag, itsn;
5839 if (hold_inp_lock) {
5840 SCTP_INP_INCR_REF(inp);
5841 SCTP_INP_RUNLOCK(inp);
5844 atomic_add_int(&asoc->refcnt, 1);
5845 SCTP_TCB_UNLOCK(stcb);
5847 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5848 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5850 * Got a duplicate vtag on some guy behind a
5851 * nat make sure we don't use it.
5855 initack->init.initiate_tag = htonl(vtag);
5856 /* get a TSN to use too */
5857 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5858 initack->init.initial_tsn = htonl(itsn);
5859 SCTP_TCB_LOCK(stcb);
5860 atomic_add_int(&asoc->refcnt, -1);
5862 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5863 initack->init.initiate_tag = htonl(vtag);
5864 /* get a TSN to use too */
5865 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5867 if (hold_inp_lock) {
5868 SCTP_INP_RLOCK(inp);
5869 SCTP_INP_DECR_REF(inp);
5872 /* save away my tag to */
5873 stc.my_vtag = initack->init.initiate_tag;
5875 /* set up some of the credits. */
5876 so = inp->sctp_socket;
5878 /* memory problem */
5882 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5884 /* set what I want */
5885 his_limit = ntohs(init_chk->init.num_inbound_streams);
5886 /* choose what I want */
5888 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5889 i_want = asoc->streamoutcnt;
5891 i_want = asoc->pre_open_streams;
5894 i_want = inp->sctp_ep.pre_open_stream_count;
5896 if (his_limit < i_want) {
5897 /* I Want more :< */
5898 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5900 /* I can have what I want :> */
5901 initack->init.num_outbound_streams = htons(i_want);
5903 /* tell him his limit. */
5904 initack->init.num_inbound_streams =
5905 htons(inp->sctp_ep.max_open_streams_intome);
5907 /* adaptation layer indication parameter */
5908 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5909 parameter_len = (uint16_t)sizeof(struct sctp_adaptation_layer_indication);
5910 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5911 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5912 ali->ph.param_length = htons(parameter_len);
5913 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5914 chunk_len += parameter_len;
5917 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5918 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5919 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5920 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5921 ph->param_type = htons(SCTP_ECN_CAPABLE);
5922 ph->param_length = htons(parameter_len);
5923 chunk_len += parameter_len;
5925 /* PR-SCTP supported parameter */
5926 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5927 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5928 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5929 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5930 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5931 ph->param_length = htons(parameter_len);
5932 chunk_len += parameter_len;
5934 /* Add NAT friendly parameter */
5936 parameter_len = (uint16_t)sizeof(struct sctp_paramhdr);
5937 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5938 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5939 ph->param_length = htons(parameter_len);
5940 chunk_len += parameter_len;
5942 /* And now tell the peer which extensions we support */
5944 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5945 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5946 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5947 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5948 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5949 ((asoc == NULL) && (inp->idata_supported == 1))) {
5950 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5953 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5954 ((asoc == NULL) && (inp->auth_supported == 1))) {
5955 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5957 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5958 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5959 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5960 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5962 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5963 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5964 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5966 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5967 ((asoc == NULL) && (inp->idata_supported == 1))) {
5968 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5970 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5971 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5972 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5974 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5975 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5976 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5979 parameter_len = (uint16_t)sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5980 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5981 pr_supported->ph.param_length = htons(parameter_len);
5982 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5983 chunk_len += parameter_len;
5985 /* add authentication parameters */
5986 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5987 ((asoc == NULL) && (inp->auth_supported == 1))) {
5988 struct sctp_auth_random *randp;
5989 struct sctp_auth_hmac_algo *hmacs;
5990 struct sctp_auth_chunk_list *chunks;
5992 if (padding_len > 0) {
5993 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5994 chunk_len += padding_len;
5997 /* generate and add RANDOM parameter */
5998 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5999 parameter_len = (uint16_t)sizeof(struct sctp_auth_random) +
6000 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6001 randp->ph.param_type = htons(SCTP_RANDOM);
6002 randp->ph.param_length = htons(parameter_len);
6003 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6004 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6005 chunk_len += parameter_len;
6007 if (padding_len > 0) {
6008 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6009 chunk_len += padding_len;
6012 /* add HMAC_ALGO parameter */
6013 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6014 parameter_len = (uint16_t)sizeof(struct sctp_auth_hmac_algo) +
6015 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6016 (uint8_t *)hmacs->hmac_ids);
6017 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6018 hmacs->ph.param_length = htons(parameter_len);
6019 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6020 chunk_len += parameter_len;
6022 if (padding_len > 0) {
6023 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6024 chunk_len += padding_len;
6027 /* add CHUNKS parameter */
6028 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6029 parameter_len = (uint16_t)sizeof(struct sctp_auth_chunk_list) +
6030 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6031 chunks->chunk_types);
6032 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6033 chunks->ph.param_length = htons(parameter_len);
6034 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6035 chunk_len += parameter_len;
6037 SCTP_BUF_LEN(m) = chunk_len;
6039 /* now the addresses */
6041 * To optimize this we could put the scoping stuff into a structure
6042 * and remove the individual uint8's from the stc structure. Then we
6043 * could just sifa in the address within the stc.. but for now this
6044 * is a quick hack to get the address stuff teased apart.
6046 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6047 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6048 scp.loopback_scope = stc.loopback_scope;
6049 scp.ipv4_local_scope = stc.ipv4_scope;
6050 scp.local_scope = stc.local_scope;
6051 scp.site_scope = stc.site_scope;
6052 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6054 &padding_len, &chunk_len);
6055 /* padding_len can only be positive, if no addresses have been added */
6056 if (padding_len > 0) {
6057 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6058 chunk_len += padding_len;
6059 SCTP_BUF_LEN(m) += padding_len;
6062 /* tack on the operational error if present */
6065 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6066 parameter_len += SCTP_BUF_LEN(m_tmp);
6068 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6069 SCTP_BUF_NEXT(m_last) = op_err;
6070 while (SCTP_BUF_NEXT(m_last) != NULL) {
6071 m_last = SCTP_BUF_NEXT(m_last);
6073 chunk_len += parameter_len;
6075 if (padding_len > 0) {
6076 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6077 if (m_last == NULL) {
6078 /* Houston we have a problem, no space */
6082 chunk_len += padding_len;
6085 /* Now we must build a cookie */
6086 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6087 if (m_cookie == NULL) {
6088 /* memory problem */
6092 /* Now append the cookie to the end and update the space/size */
6093 SCTP_BUF_NEXT(m_last) = m_cookie;
6095 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6096 parameter_len += SCTP_BUF_LEN(m_tmp);
6097 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6101 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6102 chunk_len += parameter_len;
6105 * Place in the size, but we don't include the last pad (if any) in
6108 initack->ch.chunk_length = htons(chunk_len);
6111 * Time to sign the cookie, we don't sign over the cookie signature
6112 * though thus we set trailer.
6114 (void)sctp_hmac_m(SCTP_HMAC,
6115 (uint8_t *)inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6116 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6117 (uint8_t *)signature, SCTP_SIGNATURE_SIZE);
6119 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6120 * here since the timer will drive a retranmission.
6122 if (padding_len > 0) {
6123 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6128 if (stc.loopback_scope) {
6129 over_addr = (union sctp_sockstore *)dst;
6134 if ((error = sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6136 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6139 SCTP_SO_NOT_LOCKED))) {
6140 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak send error %d\n", error);
6141 if (error == ENOBUFS) {
6143 asoc->ifp_had_enobuf = 1;
6145 SCTP_STAT_INCR(sctps_lowlevelerr);
6149 asoc->ifp_had_enobuf = 0;
6152 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6157 sctp_prune_prsctp(struct sctp_tcb *stcb,
6158 struct sctp_association *asoc,
6159 struct sctp_sndrcvinfo *srcv,
6163 struct sctp_tmit_chunk *chk, *nchk;
6165 SCTP_TCB_LOCK_ASSERT(stcb);
6166 if ((asoc->prsctp_supported) &&
6167 (asoc->sent_queue_cnt_removeable > 0)) {
6168 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6170 * Look for chunks marked with the PR_SCTP flag AND
6171 * the buffer space flag. If the one being sent is
6172 * equal or greater priority then purge the old one
6173 * and free some space.
6175 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6177 * This one is PR-SCTP AND buffer space
6180 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6182 * Lower numbers equates to higher
6183 * priority so if the one we are
6184 * looking at has a larger or equal
6185 * priority we want to drop the data
6186 * and NOT retransmit it.
6190 * We release the book_size
6191 * if the mbuf is here
6196 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6200 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6203 freed_spc += ret_spc;
6204 if (freed_spc >= dataout) {
6207 } /* if chunk was present */
6208 } /* if of sufficient priority */
6209 } /* if chunk has enabled */
6210 } /* tailqforeach */
6212 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6213 /* Here we must move to the sent queue and mark */
6214 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6215 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6218 * We release the book_size
6219 * if the mbuf is here
6223 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6226 freed_spc += ret_spc;
6227 if (freed_spc >= dataout) {
6230 } /* end if chk->data */
6231 } /* end if right class */
6232 } /* end if chk pr-sctp */
6233 } /* tailqforeachsafe (chk) */
6234 } /* if enabled in asoc */
6238 sctp_get_frag_point(struct sctp_tcb *stcb,
6239 struct sctp_association *asoc)
6244 * For endpoints that have both v6 and v4 addresses we must reserve
6245 * room for the ipv6 header, for those that are only dealing with V4
6246 * we use a larger frag point.
6248 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6249 ovh = SCTP_MIN_OVERHEAD;
6251 ovh = SCTP_MIN_V4_OVERHEAD;
6253 ovh += SCTP_DATA_CHUNK_OVERHEAD(stcb);
6254 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6255 siz = asoc->smallest_mtu - ovh;
6257 siz = (stcb->asoc.sctp_frag_point - ovh);
6259 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6261 /* A data chunk MUST fit in a cluster */
6262 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6265 /* adjust for an AUTH chunk if DATA requires auth */
6266 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6267 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6270 /* make it an even word boundary please */
6277 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6280 * We assume that the user wants PR_SCTP_TTL if the user provides a
6281 * positive lifetime but does not specify any PR_SCTP policy.
6283 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6284 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6285 } else if (sp->timetolive > 0) {
6286 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6287 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6291 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6292 case CHUNK_FLAGS_PR_SCTP_BUF:
6294 * Time to live is a priority stored in tv_sec when doing
6295 * the buffer drop thing.
6297 sp->ts.tv_sec = sp->timetolive;
6300 case CHUNK_FLAGS_PR_SCTP_TTL:
6304 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6305 tv.tv_sec = sp->timetolive / 1000;
6306 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6308 * TODO sctp_constants.h needs alternative time
6309 * macros when _KERNEL is undefined.
6311 timevaladd(&sp->ts, &tv);
6314 case CHUNK_FLAGS_PR_SCTP_RTX:
6316 * Time to live is a the number or retransmissions stored in
6319 sp->ts.tv_sec = sp->timetolive;
6323 SCTPDBG(SCTP_DEBUG_USRREQ1,
6324 "Unknown PR_SCTP policy %u.\n",
6325 PR_SCTP_POLICY(sp->sinfo_flags));
6331 sctp_msg_append(struct sctp_tcb *stcb,
6332 struct sctp_nets *net,
6334 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6338 struct sctp_stream_queue_pending *sp = NULL;
6339 struct sctp_stream_out *strm;
6342 * Given an mbuf chain, put it into the association send queue and
6343 * place it on the wheel
6345 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6346 /* Invalid stream number */
6347 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6351 if ((stcb->asoc.stream_locked) &&
6352 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6353 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6357 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6358 /* Now can we send this? */
6359 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6360 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6361 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6362 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6363 /* got data while shutting down */
6364 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6368 sctp_alloc_a_strmoq(stcb, sp);
6370 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6374 sp->sinfo_flags = srcv->sinfo_flags;
6375 sp->timetolive = srcv->sinfo_timetolive;
6376 sp->ppid = srcv->sinfo_ppid;
6377 sp->context = srcv->sinfo_context;
6379 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6381 atomic_add_int(&sp->net->ref_count, 1);
6385 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6386 sp->sid = srcv->sinfo_stream;
6387 sp->msg_is_complete = 1;
6388 sp->sender_all_done = 1;
6391 sp->tail_mbuf = NULL;
6392 sctp_set_prsctp_policy(sp);
6394 * We could in theory (for sendall) sifa the length in, but we would
6395 * still have to hunt through the chain since we need to setup the
6399 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6400 if (SCTP_BUF_NEXT(at) == NULL)
6402 sp->length += SCTP_BUF_LEN(at);
6404 if (srcv->sinfo_keynumber_valid) {
6405 sp->auth_keyid = srcv->sinfo_keynumber;
6407 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6409 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6410 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6411 sp->holds_key_ref = 1;
6413 if (hold_stcb_lock == 0) {
6414 SCTP_TCB_SEND_LOCK(stcb);
6416 sctp_snd_sb_alloc(stcb, sp->length);
6417 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6418 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6419 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6421 if (hold_stcb_lock == 0) {
6422 SCTP_TCB_SEND_UNLOCK(stcb);
6432 static struct mbuf *
6433 sctp_copy_mbufchain(struct mbuf *clonechain,
6434 struct mbuf *outchain,
6435 struct mbuf **endofchain,
6438 uint8_t copy_by_ref)
6441 struct mbuf *appendchain;
6445 if (endofchain == NULL) {
6449 sctp_m_freem(outchain);
6452 if (can_take_mbuf) {
6453 appendchain = clonechain;
6456 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6458 /* Its not in a cluster */
6459 if (*endofchain == NULL) {
6460 /* lets get a mbuf cluster */
6461 if (outchain == NULL) {
6462 /* This is the general case */
6464 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6465 if (outchain == NULL) {
6468 SCTP_BUF_LEN(outchain) = 0;
6469 *endofchain = outchain;
6470 /* get the prepend space */
6471 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6474 * We really should not get a NULL
6480 if (SCTP_BUF_NEXT(m) == NULL) {
6484 m = SCTP_BUF_NEXT(m);
6487 if (*endofchain == NULL) {
6489 * huh, TSNH XXX maybe we
6492 sctp_m_freem(outchain);
6496 /* get the new end of length */
6497 len = (int)M_TRAILINGSPACE(*endofchain);
6499 /* how much is left at the end? */
6500 len = (int)M_TRAILINGSPACE(*endofchain);
6502 /* Find the end of the data, for appending */
6503 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6505 /* Now lets copy it out */
6506 if (len >= sizeofcpy) {
6507 /* It all fits, copy it in */
6508 m_copydata(clonechain, 0, sizeofcpy, cp);
6509 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6511 /* fill up the end of the chain */
6513 m_copydata(clonechain, 0, len, cp);
6514 SCTP_BUF_LEN((*endofchain)) += len;
6515 /* now we need another one */
6518 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6523 SCTP_BUF_NEXT((*endofchain)) = m;
6525 cp = mtod((*endofchain), caddr_t);
6526 m_copydata(clonechain, len, sizeofcpy, cp);
6527 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6531 /* copy the old fashion way */
6532 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6533 #ifdef SCTP_MBUF_LOGGING
6534 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6535 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6540 if (appendchain == NULL) {
6543 sctp_m_freem(outchain);
6547 /* tack on to the end */
6548 if (*endofchain != NULL) {
6549 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6553 if (SCTP_BUF_NEXT(m) == NULL) {
6554 SCTP_BUF_NEXT(m) = appendchain;
6557 m = SCTP_BUF_NEXT(m);
6561 * save off the end and update the end-chain position
6565 if (SCTP_BUF_NEXT(m) == NULL) {
6569 m = SCTP_BUF_NEXT(m);
6573 /* save off the end and update the end-chain position */
6576 if (SCTP_BUF_NEXT(m) == NULL) {
6580 m = SCTP_BUF_NEXT(m);
6582 return (appendchain);
6587 sctp_med_chunk_output(struct sctp_inpcb *inp,
6588 struct sctp_tcb *stcb,
6589 struct sctp_association *asoc,
6592 int control_only, int from_where,
6593 struct timeval *now, int *now_filled, int frag_point, int so_locked
6594 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6600 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6601 uint32_t val SCTP_UNUSED)
6603 struct sctp_copy_all *ca;
6606 int added_control = 0;
6607 int un_sent, do_chunk_output = 1;
6608 struct sctp_association *asoc;
6609 struct sctp_nets *net;
6611 ca = (struct sctp_copy_all *)ptr;
6612 if (ca->m == NULL) {
6615 if (ca->inp != inp) {
6619 if (ca->sndlen > 0) {
6620 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6622 /* can't copy so we are done */
6626 #ifdef SCTP_MBUF_LOGGING
6627 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6628 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6634 SCTP_TCB_LOCK_ASSERT(stcb);
6635 if (stcb->asoc.alternate) {
6636 net = stcb->asoc.alternate;
6638 net = stcb->asoc.primary_destination;
6640 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6641 /* Abort this assoc with m as the user defined reason */
6643 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6645 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6646 0, M_NOWAIT, 1, MT_DATA);
6647 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6650 struct sctp_paramhdr *ph;
6652 ph = mtod(m, struct sctp_paramhdr *);
6653 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6654 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + ca->sndlen));
6657 * We add one here to keep the assoc from dis-appearing on
6660 atomic_add_int(&stcb->asoc.refcnt, 1);
6661 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6663 * sctp_abort_an_association calls sctp_free_asoc() free
6664 * association will NOT free it since we incremented the
6665 * refcnt .. we do this to prevent it being freed and things
6666 * getting tricky since we could end up (from free_asoc)
6667 * calling inpcb_free which would get a recursive lock call
6668 * to the iterator lock.. But as a consequence of that the
6669 * stcb will return to us un-locked.. since free_asoc
6670 * returns with either no TCB or the TCB unlocked, we must
6671 * relock.. to unlock in the iterator timer :-0
6673 SCTP_TCB_LOCK(stcb);
6674 atomic_add_int(&stcb->asoc.refcnt, -1);
6675 goto no_chunk_output;
6678 ret = sctp_msg_append(stcb, net, m,
6682 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6683 /* shutdown this assoc */
6684 if (TAILQ_EMPTY(&asoc->send_queue) &&
6685 TAILQ_EMPTY(&asoc->sent_queue) &&
6686 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6687 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6691 * there is nothing queued to send, so I'm
6694 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6695 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6696 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6698 * only send SHUTDOWN the first time
6701 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6702 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6704 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6705 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6706 sctp_stop_timers_for_shutdown(stcb);
6707 sctp_send_shutdown(stcb, net);
6708 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6710 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6711 asoc->primary_destination);
6713 do_chunk_output = 0;
6717 * we still got (or just got) data to send,
6718 * so set SHUTDOWN_PENDING
6721 * XXX sockets draft says that SCTP_EOF
6722 * should be sent with no data. currently,
6723 * we will allow user data to be sent first
6724 * and move to SHUTDOWN-PENDING
6726 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6727 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6728 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6729 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6730 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6732 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6733 if (TAILQ_EMPTY(&asoc->send_queue) &&
6734 TAILQ_EMPTY(&asoc->sent_queue) &&
6735 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6736 struct mbuf *op_err;
6737 char msg[SCTP_DIAG_INFO_LEN];
6740 snprintf(msg, sizeof(msg),
6741 "%s:%d at %s", __FILE__, __LINE__, __func__);
6742 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6744 atomic_add_int(&stcb->asoc.refcnt, 1);
6745 sctp_abort_an_association(stcb->sctp_ep, stcb,
6746 op_err, SCTP_SO_NOT_LOCKED);
6747 atomic_add_int(&stcb->asoc.refcnt, -1);
6748 goto no_chunk_output;
6750 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6751 asoc->primary_destination);
6757 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6758 (stcb->asoc.stream_queue_cnt * SCTP_DATA_CHUNK_OVERHEAD(stcb)));
6760 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6761 (stcb->asoc.total_flight > 0) &&
6762 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6763 do_chunk_output = 0;
6765 if (do_chunk_output)
6766 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6767 else if (added_control) {
6768 int num_out, reason, now_filled = 0;
6772 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6773 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6774 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6785 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6787 struct sctp_copy_all *ca;
6789 ca = (struct sctp_copy_all *)ptr;
6791 * Do a notify here? Kacheong suggests that the notify be done at
6792 * the send time.. so you would push up a notification if any send
6793 * failed. Don't know if this is feasible since the only failures we
6794 * have is "memory" related and if you cannot get an mbuf to send
6795 * the data you surely can't get an mbuf to send up to notify the
6796 * user you can't send the data :->
6799 /* now free everything */
6800 sctp_m_freem(ca->m);
6801 SCTP_FREE(ca, SCTP_M_COPYAL);
6804 static struct mbuf *
6805 sctp_copy_out_all(struct uio *uio, int len)
6807 struct mbuf *ret, *at;
6808 int left, willcpy, cancpy, error;
6810 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6816 SCTP_BUF_LEN(ret) = 0;
6817 /* save space for the data chunk header */
6818 cancpy = (int)M_TRAILINGSPACE(ret);
6819 willcpy = min(cancpy, left);
6822 /* Align data to the end */
6823 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6829 SCTP_BUF_LEN(at) = willcpy;
6830 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6833 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6834 if (SCTP_BUF_NEXT(at) == NULL) {
6837 at = SCTP_BUF_NEXT(at);
6838 SCTP_BUF_LEN(at) = 0;
6839 cancpy = (int)M_TRAILINGSPACE(at);
6840 willcpy = min(cancpy, left);
6847 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6848 struct sctp_sndrcvinfo *srcv)
6851 struct sctp_copy_all *ca;
6853 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6860 memset(ca, 0, sizeof(struct sctp_copy_all));
6864 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6867 * take off the sendall flag, it would be bad if we failed to do
6870 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6871 /* get length and mbuf chain */
6873 ca->sndlen = (int)uio->uio_resid;
6874 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6875 if (ca->m == NULL) {
6876 SCTP_FREE(ca, SCTP_M_COPYAL);
6877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6881 /* Gather the length of the send */
6885 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6886 ca->sndlen += SCTP_BUF_LEN(mat);
6889 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6890 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6891 SCTP_ASOC_ANY_STATE,
6893 sctp_sendall_completes, inp, 1);
6895 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6896 SCTP_FREE(ca, SCTP_M_COPYAL);
6897 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6905 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6907 struct sctp_tmit_chunk *chk, *nchk;
6909 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6910 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6911 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6913 sctp_m_freem(chk->data);
6916 asoc->ctrl_queue_cnt--;
6917 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6923 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6925 struct sctp_association *asoc;
6926 struct sctp_tmit_chunk *chk, *nchk;
6927 struct sctp_asconf_chunk *acp;
6930 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6931 /* find SCTP_ASCONF chunk in queue */
6932 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6934 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6935 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6940 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6942 sctp_m_freem(chk->data);
6945 asoc->ctrl_queue_cnt--;
6946 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6953 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6954 struct sctp_association *asoc,
6955 struct sctp_tmit_chunk **data_list,
6957 struct sctp_nets *net)
6960 struct sctp_tmit_chunk *tp1;
6962 for (i = 0; i < bundle_at; i++) {
6963 /* off of the send queue */
6964 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6965 asoc->send_queue_cnt--;
6968 * Any chunk NOT 0 you zap the time chunk 0 gets
6969 * zapped or set based on if a RTO measurment is
6972 data_list[i]->do_rtt = 0;
6975 data_list[i]->sent_rcv_time = net->last_sent_time;
6976 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6977 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.tsn;
6978 if (data_list[i]->whoTo == NULL) {
6979 data_list[i]->whoTo = net;
6980 atomic_add_int(&net->ref_count, 1);
6982 /* on to the sent queue */
6983 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6984 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6985 struct sctp_tmit_chunk *tpp;
6987 /* need to move back */
6989 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6991 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6995 if (SCTP_TSN_GT(tp1->rec.data.tsn, data_list[i]->rec.data.tsn)) {
6998 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7000 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7005 /* This does not lower until the cum-ack passes it */
7006 asoc->sent_queue_cnt++;
7007 if ((asoc->peers_rwnd <= 0) &&
7008 (asoc->total_flight == 0) &&
7010 /* Mark the chunk as being a window probe */
7011 SCTP_STAT_INCR(sctps_windowprobed);
7013 #ifdef SCTP_AUDITING_ENABLED
7014 sctp_audit_log(0xC2, 3);
7016 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7017 data_list[i]->snd_count = 1;
7018 data_list[i]->rec.data.chunk_was_revoked = 0;
7019 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7020 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7021 data_list[i]->whoTo->flight_size,
7022 data_list[i]->book_size,
7023 (uint32_t)(uintptr_t)data_list[i]->whoTo,
7024 data_list[i]->rec.data.tsn);
7026 sctp_flight_size_increase(data_list[i]);
7027 sctp_total_flight_increase(stcb, data_list[i]);
7028 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7029 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7030 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7032 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7033 (uint32_t)(data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7034 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7035 /* SWS sender side engages */
7036 asoc->peers_rwnd = 0;
7039 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7040 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7045 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7046 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7051 struct sctp_tmit_chunk *chk, *nchk;
7053 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7054 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7055 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7056 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7057 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7058 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7059 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7060 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7061 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7062 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7063 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7064 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7065 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7066 /* Stray chunks must be cleaned up */
7068 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7070 sctp_m_freem(chk->data);
7073 asoc->ctrl_queue_cnt--;
7074 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7075 asoc->fwd_tsn_cnt--;
7076 sctp_free_a_chunk(stcb, chk, so_locked);
7077 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7078 /* special handling, we must look into the param */
7079 if (chk != asoc->str_reset) {
7080 goto clean_up_anyway;
7087 sctp_can_we_split_this(struct sctp_tcb *stcb, uint32_t length,
7088 uint32_t space_left, uint32_t frag_point, int eeor_on)
7091 * Make a decision on if I should split a msg into multiple parts.
7092 * This is only asked of incomplete messages.
7096 * If we are doing EEOR we need to always send it if its the
7097 * entire thing, since it might be all the guy is putting in
7100 if (space_left >= length) {
7102 * If we have data outstanding,
7103 * we get another chance when the sack
7104 * arrives to transmit - wait for more data
7106 if (stcb->asoc.total_flight == 0) {
7108 * If nothing is in flight, we zero the
7116 /* You can fill the rest */
7117 return (space_left);
7121 * For those strange folk that make the send buffer
7122 * smaller than our fragmentation point, we can't
7123 * get a full msg in so we have to allow splitting.
7125 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7128 if ((length <= space_left) ||
7129 ((length - space_left) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7130 /* Sub-optimial residual don't split in non-eeor mode. */
7134 * If we reach here length is larger than the space_left. Do we wish
7135 * to split it for the sake of packet putting together?
7137 if (space_left >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7138 /* Its ok to split it */
7139 return (min(space_left, frag_point));
7141 /* Nope, can't split */
7146 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7147 struct sctp_stream_out *strq,
7148 uint32_t space_left,
7149 uint32_t frag_point,
7154 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7159 /* Move from the stream to the send_queue keeping track of the total */
7160 struct sctp_association *asoc;
7161 struct sctp_stream_queue_pending *sp;
7162 struct sctp_tmit_chunk *chk;
7163 struct sctp_data_chunk *dchkh = NULL;
7164 struct sctp_idata_chunk *ndchkh = NULL;
7165 uint32_t to_move, length;
7167 uint8_t rcv_flags = 0;
7169 uint8_t send_lock_up = 0;
7171 SCTP_TCB_LOCK_ASSERT(stcb);
7174 /* sa_ignore FREED_MEMORY */
7175 sp = TAILQ_FIRST(&strq->outqueue);
7177 if (send_lock_up == 0) {
7178 SCTP_TCB_SEND_LOCK(stcb);
7181 sp = TAILQ_FIRST(&strq->outqueue);
7185 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7186 (stcb->asoc.idata_supported == 0) &&
7187 (strq->last_msg_incomplete)) {
7188 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7190 strq->last_msg_incomplete);
7191 strq->last_msg_incomplete = 0;
7195 SCTP_TCB_SEND_UNLOCK(stcb);
7200 if ((sp->msg_is_complete) && (sp->length == 0)) {
7201 if (sp->sender_all_done) {
7203 * We are doing differed cleanup. Last time through
7204 * when we took all the data the sender_all_done was
7207 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7210 sp->sender_all_done,
7212 sp->msg_is_complete,
7216 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7217 SCTP_TCB_SEND_LOCK(stcb);
7220 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7221 TAILQ_REMOVE(&strq->outqueue, sp, next);
7222 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7223 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7224 (strq->chunks_on_queues == 0) &&
7225 TAILQ_EMPTY(&strq->outqueue)) {
7226 stcb->asoc.trigger_reset = 1;
7229 sctp_free_remote_addr(sp->net);
7233 sctp_m_freem(sp->data);
7236 sctp_free_a_strmoq(stcb, sp, so_locked);
7237 /* we can't be locked to it */
7239 SCTP_TCB_SEND_UNLOCK(stcb);
7242 /* back to get the next msg */
7246 * sender just finished this but still holds a
7254 /* is there some to get */
7255 if (sp->length == 0) {
7260 } else if (sp->discard_rest) {
7261 if (send_lock_up == 0) {
7262 SCTP_TCB_SEND_LOCK(stcb);
7265 /* Whack down the size */
7266 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7267 if ((stcb->sctp_socket != NULL) &&
7268 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7269 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7270 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7273 sctp_m_freem(sp->data);
7275 sp->tail_mbuf = NULL;
7284 some_taken = sp->some_taken;
7286 length = sp->length;
7287 if (sp->msg_is_complete) {
7288 /* The message is complete */
7289 to_move = min(length, frag_point);
7290 if (to_move == length) {
7291 /* All of it fits in the MTU */
7292 if (sp->some_taken) {
7293 rcv_flags |= SCTP_DATA_LAST_FRAG;
7295 rcv_flags |= SCTP_DATA_NOT_FRAG;
7297 sp->put_last_out = 1;
7298 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7299 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7302 /* Not all of it fits, we fragment */
7303 if (sp->some_taken == 0) {
7304 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7309 to_move = sctp_can_we_split_this(stcb, length, space_left, frag_point, eeor_mode);
7312 * We use a snapshot of length in case it
7313 * is expanding during the compare.
7318 if (to_move >= llen) {
7320 if (send_lock_up == 0) {
7322 * We are taking all of an incomplete msg
7323 * thus we need a send lock.
7325 SCTP_TCB_SEND_LOCK(stcb);
7327 if (sp->msg_is_complete) {
7329 * the sender finished the
7336 if (sp->some_taken == 0) {
7337 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7341 /* Nothing to take. */
7348 /* If we reach here, we can copy out a chunk */
7349 sctp_alloc_a_chunk(stcb, chk);
7351 /* No chunk memory */
7357 * Setup for unordered if needed by looking at the user sent info
7360 if (sp->sinfo_flags & SCTP_UNORDERED) {
7361 rcv_flags |= SCTP_DATA_UNORDERED;
7363 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7364 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7365 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7367 /* clear out the chunk before setting up */
7368 memset(chk, 0, sizeof(*chk));
7369 chk->rec.data.rcv_flags = rcv_flags;
7371 if (to_move >= length) {
7372 /* we think we can steal the whole thing */
7373 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7374 SCTP_TCB_SEND_LOCK(stcb);
7377 if (to_move < sp->length) {
7378 /* bail, it changed */
7381 chk->data = sp->data;
7382 chk->last_mbuf = sp->tail_mbuf;
7383 /* register the stealing */
7384 sp->data = sp->tail_mbuf = NULL;
7389 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7390 chk->last_mbuf = NULL;
7391 if (chk->data == NULL) {
7392 sp->some_taken = some_taken;
7393 sctp_free_a_chunk(stcb, chk, so_locked);
7398 #ifdef SCTP_MBUF_LOGGING
7399 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7400 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7403 /* Pull off the data */
7404 m_adj(sp->data, to_move);
7405 /* Now lets work our way down and compact it */
7407 while (m && (SCTP_BUF_LEN(m) == 0)) {
7408 sp->data = SCTP_BUF_NEXT(m);
7409 SCTP_BUF_NEXT(m) = NULL;
7410 if (sp->tail_mbuf == m) {
7412 * Freeing tail? TSNH since
7413 * we supposedly were taking less
7414 * than the sp->length.
7417 panic("Huh, freing tail? - TSNH");
7419 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7420 sp->tail_mbuf = sp->data = NULL;
7429 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7430 chk->copy_by_ref = 1;
7432 chk->copy_by_ref = 0;
7435 * get last_mbuf and counts of mb usage This is ugly but hopefully
7436 * its only one mbuf.
7438 if (chk->last_mbuf == NULL) {
7439 chk->last_mbuf = chk->data;
7440 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7441 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7444 if (to_move > length) {
7445 /*- This should not happen either
7446 * since we always lower to_move to the size
7447 * of sp->length if its larger.
7450 panic("Huh, how can to_move be larger?");
7452 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7456 atomic_subtract_int(&sp->length, to_move);
7458 leading = SCTP_DATA_CHUNK_OVERHEAD(stcb);
7459 if (M_LEADINGSPACE(chk->data) < leading) {
7460 /* Not enough room for a chunk header, get some */
7463 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7466 * we're in trouble here. _PREPEND below will free
7467 * all the data if there is no leading space, so we
7468 * must put the data back and restore.
7470 if (send_lock_up == 0) {
7471 SCTP_TCB_SEND_LOCK(stcb);
7474 if (sp->data == NULL) {
7475 /* unsteal the data */
7476 sp->data = chk->data;
7477 sp->tail_mbuf = chk->last_mbuf;
7481 /* reassemble the data */
7483 sp->data = chk->data;
7484 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7486 sp->some_taken = some_taken;
7487 atomic_add_int(&sp->length, to_move);
7490 sctp_free_a_chunk(stcb, chk, so_locked);
7494 SCTP_BUF_LEN(m) = 0;
7495 SCTP_BUF_NEXT(m) = chk->data;
7497 M_ALIGN(chk->data, 4);
7500 SCTP_BUF_PREPEND(chk->data, SCTP_DATA_CHUNK_OVERHEAD(stcb), M_NOWAIT);
7501 if (chk->data == NULL) {
7502 /* HELP, TSNH since we assured it would not above? */
7504 panic("prepend failes HELP?");
7506 SCTP_PRINTF("prepend fails HELP?\n");
7507 sctp_free_a_chunk(stcb, chk, so_locked);
7513 sctp_snd_sb_alloc(stcb, SCTP_DATA_CHUNK_OVERHEAD(stcb));
7514 chk->book_size = chk->send_size = (uint16_t)(to_move + SCTP_DATA_CHUNK_OVERHEAD(stcb));
7515 chk->book_size_scale = 0;
7516 chk->sent = SCTP_DATAGRAM_UNSENT;
7519 chk->asoc = &stcb->asoc;
7520 chk->pad_inplace = 0;
7521 chk->no_fr_allowed = 0;
7522 if (stcb->asoc.idata_supported == 0) {
7523 if (rcv_flags & SCTP_DATA_UNORDERED) {
7524 /* Just use 0. The receiver ignores the values. */
7525 chk->rec.data.mid = 0;
7527 chk->rec.data.mid = strq->next_mid_ordered;
7528 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7529 strq->next_mid_ordered++;
7533 if (rcv_flags & SCTP_DATA_UNORDERED) {
7534 chk->rec.data.mid = strq->next_mid_unordered;
7535 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7536 strq->next_mid_unordered++;
7539 chk->rec.data.mid = strq->next_mid_ordered;
7540 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7541 strq->next_mid_ordered++;
7545 chk->rec.data.sid = sp->sid;
7546 chk->rec.data.ppid = sp->ppid;
7547 chk->rec.data.context = sp->context;
7548 chk->rec.data.doing_fast_retransmit = 0;
7550 chk->rec.data.timetodrop = sp->ts;
7551 chk->flags = sp->act_flags;
7554 chk->whoTo = sp->net;
7555 atomic_add_int(&chk->whoTo->ref_count, 1);
7559 if (sp->holds_key_ref) {
7560 chk->auth_keyid = sp->auth_keyid;
7561 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7562 chk->holds_key_ref = 1;
7564 chk->rec.data.tsn = atomic_fetchadd_int(&asoc->sending_seq, 1);
7565 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7566 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7567 (uint32_t)(uintptr_t)stcb, sp->length,
7568 (uint32_t)((chk->rec.data.sid << 16) | (0x0000ffff & chk->rec.data.mid)),
7571 if (stcb->asoc.idata_supported == 0) {
7572 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7574 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7577 * Put the rest of the things in place now. Size was done earlier in
7578 * previous loop prior to padding.
7581 #ifdef SCTP_ASOCLOG_OF_TSNS
7582 SCTP_TCB_LOCK_ASSERT(stcb);
7583 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7584 asoc->tsn_out_at = 0;
7585 asoc->tsn_out_wrapped = 1;
7587 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.tsn;
7588 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.sid;
7589 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.mid;
7590 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7591 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7592 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7593 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7594 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7597 if (stcb->asoc.idata_supported == 0) {
7598 dchkh->ch.chunk_type = SCTP_DATA;
7599 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7600 dchkh->dp.tsn = htonl(chk->rec.data.tsn);
7601 dchkh->dp.sid = htons(strq->sid);
7602 dchkh->dp.ssn = htons((uint16_t)chk->rec.data.mid);
7603 dchkh->dp.ppid = chk->rec.data.ppid;
7604 dchkh->ch.chunk_length = htons(chk->send_size);
7606 ndchkh->ch.chunk_type = SCTP_IDATA;
7607 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7608 ndchkh->dp.tsn = htonl(chk->rec.data.tsn);
7609 ndchkh->dp.sid = htons(strq->sid);
7610 ndchkh->dp.reserved = htons(0);
7611 ndchkh->dp.mid = htonl(chk->rec.data.mid);
7613 ndchkh->dp.ppid_fsn.ppid = chk->rec.data.ppid;
7615 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7617 ndchkh->ch.chunk_length = htons(chk->send_size);
7619 /* Now advance the chk->send_size by the actual pad needed. */
7620 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7625 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7626 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7628 chk->last_mbuf = lm;
7629 chk->pad_inplace = 1;
7631 chk->send_size += pads;
7633 if (PR_SCTP_ENABLED(chk->flags)) {
7634 asoc->pr_sctp_cnt++;
7636 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7637 /* All done pull and kill the message */
7638 if (sp->put_last_out == 0) {
7639 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7640 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7641 sp->sender_all_done,
7643 sp->msg_is_complete,
7647 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7648 SCTP_TCB_SEND_LOCK(stcb);
7651 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7652 TAILQ_REMOVE(&strq->outqueue, sp, next);
7653 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7654 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7655 (strq->chunks_on_queues == 0) &&
7656 TAILQ_EMPTY(&strq->outqueue)) {
7657 stcb->asoc.trigger_reset = 1;
7660 sctp_free_remote_addr(sp->net);
7664 sctp_m_freem(sp->data);
7667 sctp_free_a_strmoq(stcb, sp, so_locked);
7669 asoc->chunks_on_out_queue++;
7670 strq->chunks_on_queues++;
7671 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7672 asoc->send_queue_cnt++;
7675 SCTP_TCB_SEND_UNLOCK(stcb);
7682 sctp_fill_outqueue(struct sctp_tcb *stcb,
7683 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7684 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7689 struct sctp_association *asoc;
7690 struct sctp_stream_out *strq;
7691 uint32_t space_left, moved, total_moved;
7694 SCTP_TCB_LOCK_ASSERT(stcb);
7697 switch (net->ro._l_addr.sa.sa_family) {
7700 space_left = net->mtu - SCTP_MIN_V4_OVERHEAD;
7705 space_left = net->mtu - SCTP_MIN_OVERHEAD;
7710 space_left = net->mtu;
7713 /* Need an allowance for the data chunk header too */
7714 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7716 /* must make even word boundary */
7717 space_left &= 0xfffffffc;
7718 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7721 while ((space_left > 0) && (strq != NULL)) {
7722 moved = sctp_move_to_outqueue(stcb, strq, space_left, frag_point,
7723 &giveup, eeor_mode, &bail, so_locked);
7724 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved);
7725 if ((giveup != 0) || (bail != 0)) {
7728 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7729 total_moved += moved;
7730 space_left -= moved;
7731 if (space_left >= SCTP_DATA_CHUNK_OVERHEAD(stcb)) {
7732 space_left -= SCTP_DATA_CHUNK_OVERHEAD(stcb);
7736 space_left &= 0xfffffffc;
7741 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7743 if (total_moved == 0) {
7744 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7745 (net == stcb->asoc.primary_destination)) {
7746 /* ran dry for primary network net */
7747 SCTP_STAT_INCR(sctps_primary_randry);
7748 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7749 /* ran dry with CMT on */
7750 SCTP_STAT_INCR(sctps_cmt_randry);
7756 sctp_fix_ecn_echo(struct sctp_association *asoc)
7758 struct sctp_tmit_chunk *chk;
7760 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7761 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7762 chk->sent = SCTP_DATAGRAM_UNSENT;
7768 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7770 struct sctp_association *asoc;
7771 struct sctp_tmit_chunk *chk;
7772 struct sctp_stream_queue_pending *sp;
7779 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7780 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7781 if (sp->net == net) {
7782 sctp_free_remote_addr(sp->net);
7787 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7788 if (chk->whoTo == net) {
7789 sctp_free_remote_addr(chk->whoTo);
7796 sctp_med_chunk_output(struct sctp_inpcb *inp,
7797 struct sctp_tcb *stcb,
7798 struct sctp_association *asoc,
7801 int control_only, int from_where,
7802 struct timeval *now, int *now_filled, int frag_point, int so_locked
7803 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7809 * Ok this is the generic chunk service queue. we must do the
7811 * - Service the stream queue that is next, moving any
7812 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7813 * LAST to the out queue in one pass) and assigning TSN's. This
7814 * only applys though if the peer does not support NDATA. For NDATA
7815 * chunks its ok to not send the entire message ;-)
7816 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7817 * fomulate and send the low level chunks. Making sure to combine
7818 * any control in the control chunk queue also.
7820 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7821 struct mbuf *outchain, *endoutchain;
7822 struct sctp_tmit_chunk *chk, *nchk;
7824 /* temp arrays for unlinking */
7825 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7826 int no_fragmentflg, error;
7827 unsigned int max_rwnd_per_dest, max_send_per_dest;
7828 int one_chunk, hbflag, skip_data_for_this_net;
7829 int asconf, cookie, no_out_cnt;
7830 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7831 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7833 uint32_t auth_offset = 0;
7834 struct sctp_auth_chunk *auth = NULL;
7835 uint16_t auth_keyid;
7836 int override_ok = 1;
7837 int skip_fill_up = 0;
7838 int data_auth_reqd = 0;
7841 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7848 auth_keyid = stcb->asoc.authinfo.active_keyid;
7849 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7850 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7851 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7856 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7858 * First lets prime the pump. For each destination, if there is room
7859 * in the flight size, attempt to pull an MTU's worth out of the
7860 * stream queues into the general send_queue
7862 #ifdef SCTP_AUDITING_ENABLED
7863 sctp_audit_log(0xC2, 2);
7865 SCTP_TCB_LOCK_ASSERT(stcb);
7872 /* Nothing to possible to send? */
7873 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7874 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7875 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7876 TAILQ_EMPTY(&asoc->send_queue) &&
7877 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7882 if (asoc->peers_rwnd == 0) {
7883 /* No room in peers rwnd */
7885 if (asoc->total_flight > 0) {
7886 /* we are allowed one chunk in flight */
7890 if (stcb->asoc.ecn_echo_cnt_onq) {
7891 /* Record where a sack goes, if any */
7892 if (no_data_chunks &&
7893 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7894 /* Nothing but ECNe to send - we don't do that */
7895 goto nothing_to_send;
7897 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7898 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7899 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7900 sack_goes_to = chk->whoTo;
7905 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7906 if (stcb->sctp_socket)
7907 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7909 max_send_per_dest = 0;
7910 if (no_data_chunks == 0) {
7911 /* How many non-directed chunks are there? */
7912 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7913 if (chk->whoTo == NULL) {
7915 * We already have non-directed chunks on
7916 * the queue, no need to do a fill-up.
7924 if ((no_data_chunks == 0) &&
7925 (skip_fill_up == 0) &&
7926 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7927 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7929 * This for loop we are in takes in each net, if
7930 * its's got space in cwnd and has data sent to it
7931 * (when CMT is off) then it calls
7932 * sctp_fill_outqueue for the net. This gets data on
7933 * the send queue for that network.
7935 * In sctp_fill_outqueue TSN's are assigned and data
7936 * is copied out of the stream buffers. Note mostly
7937 * copy by reference (we hope).
7939 net->window_probe = 0;
7940 if ((net != stcb->asoc.alternate) &&
7941 ((net->dest_state & SCTP_ADDR_PF) ||
7942 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7943 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7944 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7945 sctp_log_cwnd(stcb, net, 1,
7946 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7950 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7951 (net->flight_size == 0)) {
7952 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7954 if (net->flight_size >= net->cwnd) {
7955 /* skip this network, no room - can't fill */
7956 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7957 sctp_log_cwnd(stcb, net, 3,
7958 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7962 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7963 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7965 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7967 /* memory alloc failure */
7973 /* now service each destination and send out what we can for it */
7974 /* Nothing to send? */
7975 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7976 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7977 TAILQ_EMPTY(&asoc->send_queue)) {
7981 if (asoc->sctp_cmt_on_off > 0) {
7982 /* get the last start point */
7983 start_at = asoc->last_net_cmt_send_started;
7984 if (start_at == NULL) {
7985 /* null so to beginning */
7986 start_at = TAILQ_FIRST(&asoc->nets);
7988 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7989 if (start_at == NULL) {
7990 start_at = TAILQ_FIRST(&asoc->nets);
7993 asoc->last_net_cmt_send_started = start_at;
7995 start_at = TAILQ_FIRST(&asoc->nets);
7997 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7998 if (chk->whoTo == NULL) {
7999 if (asoc->alternate) {
8000 chk->whoTo = asoc->alternate;
8002 chk->whoTo = asoc->primary_destination;
8004 atomic_add_int(&chk->whoTo->ref_count, 1);
8007 old_start_at = NULL;
8008 again_one_more_time:
8009 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8010 /* how much can we send? */
8011 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8012 if (old_start_at && (old_start_at == net)) {
8013 /* through list ocmpletely. */
8017 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8018 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8019 (net->flight_size >= net->cwnd)) {
8021 * Nothing on control or asconf and flight is full,
8022 * we can skip even in the CMT case.
8027 endoutchain = outchain = NULL;
8030 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8031 skip_data_for_this_net = 1;
8033 skip_data_for_this_net = 0;
8035 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8038 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8043 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8053 if (mtu > asoc->peers_rwnd) {
8054 if (asoc->total_flight > 0) {
8055 /* We have a packet in flight somewhere */
8056 r_mtu = asoc->peers_rwnd;
8058 /* We are always allowed to send one MTU out */
8066 /************************/
8067 /* ASCONF transmission */
8068 /************************/
8069 /* Now first lets go through the asconf queue */
8070 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8071 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8074 if (chk->whoTo == NULL) {
8075 if (asoc->alternate == NULL) {
8076 if (asoc->primary_destination != net) {
8080 if (asoc->alternate != net) {
8085 if (chk->whoTo != net) {
8089 if (chk->data == NULL) {
8092 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8093 chk->sent != SCTP_DATAGRAM_RESEND) {
8097 * if no AUTH is yet included and this chunk
8098 * requires it, make sure to account for it. We
8099 * don't apply the size until the AUTH chunk is
8100 * actually added below in case there is no room for
8101 * this chunk. NOTE: we overload the use of "omtu"
8104 if ((auth == NULL) &&
8105 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8106 stcb->asoc.peer_auth_chunks)) {
8107 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8110 /* Here we do NOT factor the r_mtu */
8111 if ((chk->send_size < (int)(mtu - omtu)) ||
8112 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8114 * We probably should glom the mbuf chain
8115 * from the chk->data for control but the
8116 * problem is it becomes yet one more level
8117 * of tracking to do if for some reason
8118 * output fails. Then I have got to
8119 * reconstruct the merged control chain.. el
8120 * yucko.. for now we take the easy way and
8124 * Add an AUTH chunk, if chunk requires it
8125 * save the offset into the chain for AUTH
8127 if ((auth == NULL) &&
8128 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8129 stcb->asoc.peer_auth_chunks))) {
8130 outchain = sctp_add_auth_chunk(outchain,
8135 chk->rec.chunk_id.id);
8136 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8138 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8139 (int)chk->rec.chunk_id.can_take_data,
8140 chk->send_size, chk->copy_by_ref);
8141 if (outchain == NULL) {
8143 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8146 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8147 /* update our MTU size */
8148 if (mtu > (chk->send_size + omtu))
8149 mtu -= (chk->send_size + omtu);
8152 to_out += (chk->send_size + omtu);
8153 /* Do clear IP_DF ? */
8154 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8157 if (chk->rec.chunk_id.can_take_data)
8160 * set hb flag since we can use these for
8166 * should sysctl this: don't bundle data
8167 * with ASCONF since it requires AUTH
8170 chk->sent = SCTP_DATAGRAM_SENT;
8171 if (chk->whoTo == NULL) {
8173 atomic_add_int(&net->ref_count, 1);
8178 * Ok we are out of room but we can
8179 * output without effecting the
8180 * flight size since this little guy
8181 * is a control only packet.
8183 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8185 * do NOT clear the asconf flag as
8186 * it is used to do appropriate
8187 * source address selection.
8189 if (*now_filled == 0) {
8190 (void)SCTP_GETTIME_TIMEVAL(now);
8193 net->last_sent_time = *now;
8195 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8196 (struct sockaddr *)&net->ro._l_addr,
8197 outchain, auth_offset, auth,
8198 stcb->asoc.authinfo.active_keyid,
8199 no_fragmentflg, 0, asconf,
8200 inp->sctp_lport, stcb->rport,
8201 htonl(stcb->asoc.peer_vtag),
8206 * error, we could not
8209 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8210 if (from_where == 0) {
8211 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8213 if (error == ENOBUFS) {
8214 asoc->ifp_had_enobuf = 1;
8215 SCTP_STAT_INCR(sctps_lowlevelerr);
8217 /* error, could not output */
8218 if (error == EHOSTUNREACH) {
8224 sctp_move_chunks_from_net(stcb, net);
8229 asoc->ifp_had_enobuf = 0;
8232 * increase the number we sent, if a
8233 * cookie is sent we don't tell them
8236 outchain = endoutchain = NULL;
8240 *num_out += ctl_cnt;
8241 /* recalc a clean slate and setup */
8242 switch (net->ro._l_addr.sa.sa_family) {
8245 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8250 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8267 /************************/
8268 /* Control transmission */
8269 /************************/
8270 /* Now first lets go through the control queue */
8271 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8272 if ((sack_goes_to) &&
8273 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8274 (chk->whoTo != sack_goes_to)) {
8276 * if we have a sack in queue, and we are
8277 * looking at an ecn echo that is NOT queued
8278 * to where the sack is going..
8280 if (chk->whoTo == net) {
8282 * Don't transmit it to where its
8283 * going (current net)
8286 } else if (sack_goes_to == net) {
8288 * But do transmit it to this
8291 goto skip_net_check;
8294 if (chk->whoTo == NULL) {
8295 if (asoc->alternate == NULL) {
8296 if (asoc->primary_destination != net) {
8300 if (asoc->alternate != net) {
8305 if (chk->whoTo != net) {
8310 if (chk->data == NULL) {
8313 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8315 * It must be unsent. Cookies and ASCONF's
8316 * hang around but there timers will force
8317 * when marked for resend.
8322 * if no AUTH is yet included and this chunk
8323 * requires it, make sure to account for it. We
8324 * don't apply the size until the AUTH chunk is
8325 * actually added below in case there is no room for
8326 * this chunk. NOTE: we overload the use of "omtu"
8329 if ((auth == NULL) &&
8330 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8331 stcb->asoc.peer_auth_chunks)) {
8332 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8335 /* Here we do NOT factor the r_mtu */
8336 if ((chk->send_size <= (int)(mtu - omtu)) ||
8337 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8339 * We probably should glom the mbuf chain
8340 * from the chk->data for control but the
8341 * problem is it becomes yet one more level
8342 * of tracking to do if for some reason
8343 * output fails. Then I have got to
8344 * reconstruct the merged control chain.. el
8345 * yucko.. for now we take the easy way and
8349 * Add an AUTH chunk, if chunk requires it
8350 * save the offset into the chain for AUTH
8352 if ((auth == NULL) &&
8353 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8354 stcb->asoc.peer_auth_chunks))) {
8355 outchain = sctp_add_auth_chunk(outchain,
8360 chk->rec.chunk_id.id);
8361 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8363 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8364 (int)chk->rec.chunk_id.can_take_data,
8365 chk->send_size, chk->copy_by_ref);
8366 if (outchain == NULL) {
8368 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8371 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8372 /* update our MTU size */
8373 if (mtu > (chk->send_size + omtu))
8374 mtu -= (chk->send_size + omtu);
8377 to_out += (chk->send_size + omtu);
8378 /* Do clear IP_DF ? */
8379 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8382 if (chk->rec.chunk_id.can_take_data)
8384 /* Mark things to be removed, if needed */
8385 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8386 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8387 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8388 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8389 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8390 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8391 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8392 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8393 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8394 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8395 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8396 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8399 /* remove these chunks at the end */
8400 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8401 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8402 /* turn off the timer */
8403 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8404 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8406 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8412 * Other chunks, since they have
8413 * timers running (i.e. COOKIE) we
8414 * just "trust" that it gets sent or
8418 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8421 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8423 * Increment ecne send count
8424 * here this means we may be
8425 * over-zealous in our
8426 * counting if the send
8427 * fails, but its the best
8428 * place to do it (we used
8429 * to do it in the queue of
8430 * the chunk, but that did
8431 * not tell how many times
8434 SCTP_STAT_INCR(sctps_sendecne);
8436 chk->sent = SCTP_DATAGRAM_SENT;
8437 if (chk->whoTo == NULL) {
8439 atomic_add_int(&net->ref_count, 1);
8445 * Ok we are out of room but we can
8446 * output without effecting the
8447 * flight size since this little guy
8448 * is a control only packet.
8451 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8453 * do NOT clear the asconf
8454 * flag as it is used to do
8455 * appropriate source
8456 * address selection.
8460 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8463 /* Only HB or ASCONF advances time */
8465 if (*now_filled == 0) {
8466 (void)SCTP_GETTIME_TIMEVAL(now);
8469 net->last_sent_time = *now;
8472 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8473 (struct sockaddr *)&net->ro._l_addr,
8476 stcb->asoc.authinfo.active_keyid,
8477 no_fragmentflg, 0, asconf,
8478 inp->sctp_lport, stcb->rport,
8479 htonl(stcb->asoc.peer_vtag),
8484 * error, we could not
8487 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8488 if (from_where == 0) {
8489 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8491 if (error == ENOBUFS) {
8492 asoc->ifp_had_enobuf = 1;
8493 SCTP_STAT_INCR(sctps_lowlevelerr);
8495 if (error == EHOSTUNREACH) {
8501 sctp_move_chunks_from_net(stcb, net);
8506 asoc->ifp_had_enobuf = 0;
8509 * increase the number we sent, if a
8510 * cookie is sent we don't tell them
8513 outchain = endoutchain = NULL;
8517 *num_out += ctl_cnt;
8518 /* recalc a clean slate and setup */
8519 switch (net->ro._l_addr.sa.sa_family) {
8522 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8527 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8544 /* JRI: if dest is in PF state, do not send data to it */
8545 if ((asoc->sctp_cmt_on_off > 0) &&
8546 (net != stcb->asoc.alternate) &&
8547 (net->dest_state & SCTP_ADDR_PF)) {
8550 if (net->flight_size >= net->cwnd) {
8553 if ((asoc->sctp_cmt_on_off > 0) &&
8554 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8555 (net->flight_size > max_rwnd_per_dest)) {
8559 * We need a specific accounting for the usage of the send
8560 * buffer. We also need to check the number of messages per
8561 * net. For now, this is better than nothing and it disabled
8564 if ((asoc->sctp_cmt_on_off > 0) &&
8565 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8566 (max_send_per_dest > 0) &&
8567 (net->flight_size > max_send_per_dest)) {
8570 /*********************/
8571 /* Data transmission */
8572 /*********************/
8574 * if AUTH for DATA is required and no AUTH has been added
8575 * yet, account for this in the mtu now... if no data can be
8576 * bundled, this adjustment won't matter anyways since the
8577 * packet will be going out...
8579 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8580 stcb->asoc.peer_auth_chunks);
8581 if (data_auth_reqd && (auth == NULL)) {
8582 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8584 /* now lets add any data within the MTU constraints */
8585 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8588 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8589 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8596 if (net->mtu > SCTP_MIN_OVERHEAD)
8597 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8607 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8608 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8609 (skip_data_for_this_net == 0)) ||
8611 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8612 if (no_data_chunks) {
8613 /* let only control go out */
8617 if (net->flight_size >= net->cwnd) {
8618 /* skip this net, no room for data */
8622 if ((chk->whoTo != NULL) &&
8623 (chk->whoTo != net)) {
8624 /* Don't send the chunk on this net */
8627 if (asoc->sctp_cmt_on_off == 0) {
8628 if ((asoc->alternate) &&
8629 (asoc->alternate != net) &&
8630 (chk->whoTo == NULL)) {
8632 } else if ((net != asoc->primary_destination) &&
8633 (asoc->alternate == NULL) &&
8634 (chk->whoTo == NULL)) {
8638 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8640 * strange, we have a chunk that is
8641 * to big for its destination and
8642 * yet no fragment ok flag.
8643 * Something went wrong when the
8644 * PMTU changed...we did not mark
8645 * this chunk for some reason?? I
8646 * will fix it here by letting IP
8647 * fragment it for now and printing
8648 * a warning. This really should not
8651 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8652 chk->send_size, mtu);
8653 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8655 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8656 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8657 struct sctp_data_chunk *dchkh;
8659 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8660 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8662 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8663 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8664 /* ok we will add this one */
8667 * Add an AUTH chunk, if chunk
8668 * requires it, save the offset into
8669 * the chain for AUTH
8671 if (data_auth_reqd) {
8673 outchain = sctp_add_auth_chunk(outchain,
8679 auth_keyid = chk->auth_keyid;
8681 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8682 } else if (override_ok) {
8687 auth_keyid = chk->auth_keyid;
8689 } else if (auth_keyid != chk->auth_keyid) {
8697 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8698 chk->send_size, chk->copy_by_ref);
8699 if (outchain == NULL) {
8700 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8701 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8702 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8705 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8708 /* upate our MTU size */
8709 /* Do clear IP_DF ? */
8710 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8713 /* unsigned subtraction of mtu */
8714 if (mtu > chk->send_size)
8715 mtu -= chk->send_size;
8718 /* unsigned subtraction of r_mtu */
8719 if (r_mtu > chk->send_size)
8720 r_mtu -= chk->send_size;
8724 to_out += chk->send_size;
8725 if ((to_out > mx_mtu) && no_fragmentflg) {
8727 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8729 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8733 chk->window_probe = 0;
8734 data_list[bundle_at++] = chk;
8735 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8738 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8739 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8740 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8742 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8744 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8745 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8755 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8757 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8758 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8759 data_list[0]->window_probe = 1;
8760 net->window_probe = 1;
8766 * Must be sent in order of the
8767 * TSN's (on a network)
8771 } /* for (chunk gather loop for this net) */
8772 } /* if asoc.state OPEN */
8774 /* Is there something to send for this destination? */
8776 /* We may need to start a control timer or two */
8778 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8781 * do NOT clear the asconf flag as it is
8782 * used to do appropriate source address
8787 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8790 /* must start a send timer if data is being sent */
8791 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8793 * no timer running on this destination
8796 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8798 if (bundle_at || hbflag) {
8799 /* For data/asconf and hb set time */
8800 if (*now_filled == 0) {
8801 (void)SCTP_GETTIME_TIMEVAL(now);
8804 net->last_sent_time = *now;
8806 /* Now send it, if there is anything to send :> */
8807 if ((error = sctp_lowlevel_chunk_output(inp,
8810 (struct sockaddr *)&net->ro._l_addr,
8818 inp->sctp_lport, stcb->rport,
8819 htonl(stcb->asoc.peer_vtag),
8823 /* error, we could not output */
8824 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8825 if (from_where == 0) {
8826 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8828 if (error == ENOBUFS) {
8829 asoc->ifp_had_enobuf = 1;
8830 SCTP_STAT_INCR(sctps_lowlevelerr);
8832 if (error == EHOSTUNREACH) {
8834 * Destination went unreachable
8837 sctp_move_chunks_from_net(stcb, net);
8841 * I add this line to be paranoid. As far as
8842 * I can tell the continue, takes us back to
8843 * the top of the for, but just to make sure
8844 * I will reset these again here.
8846 ctl_cnt = bundle_at = 0;
8847 continue; /* This takes us back to the
8848 * for() for the nets. */
8850 asoc->ifp_had_enobuf = 0;
8856 *num_out += (ctl_cnt + bundle_at);
8859 /* setup for a RTO measurement */
8860 tsns_sent = data_list[0]->rec.data.tsn;
8861 /* fill time if not already filled */
8862 if (*now_filled == 0) {
8863 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8865 *now = asoc->time_last_sent;
8867 asoc->time_last_sent = *now;
8869 if (net->rto_needed) {
8870 data_list[0]->do_rtt = 1;
8871 net->rto_needed = 0;
8873 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8874 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8880 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8881 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8884 if (old_start_at == NULL) {
8885 old_start_at = start_at;
8886 start_at = TAILQ_FIRST(&asoc->nets);
8888 goto again_one_more_time;
8891 * At the end there should be no NON timed chunks hanging on this
8894 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8895 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8897 if ((*num_out == 0) && (*reason_code == 0)) {
8902 sctp_clean_up_ctl(stcb, asoc, so_locked);
8907 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8910 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8911 * the control chunk queue.
8913 struct sctp_chunkhdr *hdr;
8914 struct sctp_tmit_chunk *chk;
8915 struct mbuf *mat, *last_mbuf;
8916 uint32_t chunk_length;
8917 uint16_t padding_length;
8919 SCTP_TCB_LOCK_ASSERT(stcb);
8920 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8921 if (op_err == NULL) {
8926 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8927 chunk_length += SCTP_BUF_LEN(mat);
8928 if (SCTP_BUF_NEXT(mat) == NULL) {
8932 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8933 sctp_m_freem(op_err);
8936 padding_length = chunk_length % 4;
8937 if (padding_length != 0) {
8938 padding_length = 4 - padding_length;
8940 if (padding_length != 0) {
8941 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8942 sctp_m_freem(op_err);
8946 sctp_alloc_a_chunk(stcb, chk);
8949 sctp_m_freem(op_err);
8952 chk->copy_by_ref = 0;
8953 chk->send_size = (uint16_t)chunk_length;
8954 chk->sent = SCTP_DATAGRAM_UNSENT;
8956 chk->asoc = &stcb->asoc;
8959 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8960 chk->rec.chunk_id.can_take_data = 0;
8961 hdr = mtod(op_err, struct sctp_chunkhdr *);
8962 hdr->chunk_type = SCTP_OPERATION_ERROR;
8963 hdr->chunk_flags = 0;
8964 hdr->chunk_length = htons(chk->send_size);
8965 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8966 chk->asoc->ctrl_queue_cnt++;
8970 sctp_send_cookie_echo(struct mbuf *m,
8972 struct sctp_tcb *stcb,
8973 struct sctp_nets *net)
8976 * pull out the cookie and put it at the front of the control chunk
8980 struct mbuf *cookie;
8981 struct sctp_paramhdr param, *phdr;
8982 struct sctp_chunkhdr *hdr;
8983 struct sctp_tmit_chunk *chk;
8984 uint16_t ptype, plen;
8986 SCTP_TCB_LOCK_ASSERT(stcb);
8987 /* First find the cookie in the param area */
8989 at = offset + sizeof(struct sctp_init_chunk);
8991 phdr = sctp_get_next_param(m, at, ¶m, sizeof(param));
8995 ptype = ntohs(phdr->param_type);
8996 plen = ntohs(phdr->param_length);
8997 if (ptype == SCTP_STATE_COOKIE) {
9000 /* found the cookie */
9001 if ((pad = (plen % 4))) {
9004 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9005 if (cookie == NULL) {
9009 #ifdef SCTP_MBUF_LOGGING
9010 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9011 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9016 at += SCTP_SIZE32(plen);
9018 /* ok, we got the cookie lets change it into a cookie echo chunk */
9019 /* first the change from param to cookie */
9020 hdr = mtod(cookie, struct sctp_chunkhdr *);
9021 hdr->chunk_type = SCTP_COOKIE_ECHO;
9022 hdr->chunk_flags = 0;
9023 /* get the chunk stuff now and place it in the FRONT of the queue */
9024 sctp_alloc_a_chunk(stcb, chk);
9027 sctp_m_freem(cookie);
9030 chk->copy_by_ref = 0;
9031 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9032 chk->rec.chunk_id.can_take_data = 0;
9033 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9034 chk->send_size = plen;
9035 chk->sent = SCTP_DATAGRAM_UNSENT;
9037 chk->asoc = &stcb->asoc;
9040 atomic_add_int(&chk->whoTo->ref_count, 1);
9041 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9042 chk->asoc->ctrl_queue_cnt++;
9047 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9051 struct sctp_nets *net)
9054 * take a HB request and make it into a HB ack and send it.
9056 struct mbuf *outchain;
9057 struct sctp_chunkhdr *chdr;
9058 struct sctp_tmit_chunk *chk;
9062 /* must have a net pointer */
9065 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9066 if (outchain == NULL) {
9067 /* gak out of memory */
9070 #ifdef SCTP_MBUF_LOGGING
9071 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9072 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9075 chdr = mtod(outchain, struct sctp_chunkhdr *);
9076 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9077 chdr->chunk_flags = 0;
9078 if (chk_length % 4) {
9080 uint32_t cpthis = 0;
9083 padlen = 4 - (chk_length % 4);
9084 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9086 sctp_alloc_a_chunk(stcb, chk);
9089 sctp_m_freem(outchain);
9092 chk->copy_by_ref = 0;
9093 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9094 chk->rec.chunk_id.can_take_data = 1;
9096 chk->send_size = chk_length;
9097 chk->sent = SCTP_DATAGRAM_UNSENT;
9099 chk->asoc = &stcb->asoc;
9100 chk->data = outchain;
9102 atomic_add_int(&chk->whoTo->ref_count, 1);
9103 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9104 chk->asoc->ctrl_queue_cnt++;
9108 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9110 /* formulate and queue a cookie-ack back to sender */
9111 struct mbuf *cookie_ack;
9112 struct sctp_chunkhdr *hdr;
9113 struct sctp_tmit_chunk *chk;
9115 SCTP_TCB_LOCK_ASSERT(stcb);
9117 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9118 if (cookie_ack == NULL) {
9122 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9123 sctp_alloc_a_chunk(stcb, chk);
9126 sctp_m_freem(cookie_ack);
9129 chk->copy_by_ref = 0;
9130 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9131 chk->rec.chunk_id.can_take_data = 1;
9133 chk->send_size = sizeof(struct sctp_chunkhdr);
9134 chk->sent = SCTP_DATAGRAM_UNSENT;
9136 chk->asoc = &stcb->asoc;
9137 chk->data = cookie_ack;
9138 if (chk->asoc->last_control_chunk_from != NULL) {
9139 chk->whoTo = chk->asoc->last_control_chunk_from;
9140 atomic_add_int(&chk->whoTo->ref_count, 1);
9144 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9145 hdr->chunk_type = SCTP_COOKIE_ACK;
9146 hdr->chunk_flags = 0;
9147 hdr->chunk_length = htons(chk->send_size);
9148 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9149 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9150 chk->asoc->ctrl_queue_cnt++;
9156 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9158 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9159 struct mbuf *m_shutdown_ack;
9160 struct sctp_shutdown_ack_chunk *ack_cp;
9161 struct sctp_tmit_chunk *chk;
9163 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9164 if (m_shutdown_ack == NULL) {
9168 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9169 sctp_alloc_a_chunk(stcb, chk);
9172 sctp_m_freem(m_shutdown_ack);
9175 chk->copy_by_ref = 0;
9176 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9177 chk->rec.chunk_id.can_take_data = 1;
9179 chk->send_size = sizeof(struct sctp_chunkhdr);
9180 chk->sent = SCTP_DATAGRAM_UNSENT;
9183 chk->asoc = &stcb->asoc;
9184 chk->data = m_shutdown_ack;
9187 atomic_add_int(&chk->whoTo->ref_count, 1);
9189 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9190 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9191 ack_cp->ch.chunk_flags = 0;
9192 ack_cp->ch.chunk_length = htons(chk->send_size);
9193 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9194 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9195 chk->asoc->ctrl_queue_cnt++;
9200 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9202 /* formulate and queue a SHUTDOWN to the sender */
9203 struct mbuf *m_shutdown;
9204 struct sctp_shutdown_chunk *shutdown_cp;
9205 struct sctp_tmit_chunk *chk;
9207 TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
9208 if (chk->rec.chunk_id.id == SCTP_SHUTDOWN) {
9209 /* We already have a SHUTDOWN queued. Reuse it. */
9211 sctp_free_remote_addr(chk->whoTo);
9218 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9219 if (m_shutdown == NULL) {
9223 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9224 sctp_alloc_a_chunk(stcb, chk);
9227 sctp_m_freem(m_shutdown);
9230 chk->copy_by_ref = 0;
9231 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9232 chk->rec.chunk_id.can_take_data = 1;
9234 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9235 chk->sent = SCTP_DATAGRAM_UNSENT;
9238 chk->asoc = &stcb->asoc;
9239 chk->data = m_shutdown;
9242 atomic_add_int(&chk->whoTo->ref_count, 1);
9244 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9245 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9246 shutdown_cp->ch.chunk_flags = 0;
9247 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9248 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9249 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9250 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9251 chk->asoc->ctrl_queue_cnt++;
9253 TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk, sctp_next);
9256 atomic_add_int(&chk->whoTo->ref_count, 1);
9258 shutdown_cp = mtod(chk->data, struct sctp_shutdown_chunk *);
9259 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9260 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
9266 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9269 * formulate and queue an ASCONF to the peer. ASCONF parameters
9270 * should be queued on the assoc queue.
9272 struct sctp_tmit_chunk *chk;
9273 struct mbuf *m_asconf;
9276 SCTP_TCB_LOCK_ASSERT(stcb);
9278 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9279 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9280 /* can't send a new one if there is one in flight already */
9283 /* compose an ASCONF chunk, maximum length is PMTU */
9284 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9285 if (m_asconf == NULL) {
9288 sctp_alloc_a_chunk(stcb, chk);
9291 sctp_m_freem(m_asconf);
9294 chk->copy_by_ref = 0;
9295 chk->rec.chunk_id.id = SCTP_ASCONF;
9296 chk->rec.chunk_id.can_take_data = 0;
9297 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9298 chk->data = m_asconf;
9299 chk->send_size = len;
9300 chk->sent = SCTP_DATAGRAM_UNSENT;
9302 chk->asoc = &stcb->asoc;
9305 atomic_add_int(&chk->whoTo->ref_count, 1);
9307 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9308 chk->asoc->ctrl_queue_cnt++;
9313 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9316 * formulate and queue a asconf-ack back to sender. the asconf-ack
9317 * must be stored in the tcb.
9319 struct sctp_tmit_chunk *chk;
9320 struct sctp_asconf_ack *ack, *latest_ack;
9322 struct sctp_nets *net = NULL;
9324 SCTP_TCB_LOCK_ASSERT(stcb);
9325 /* Get the latest ASCONF-ACK */
9326 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9327 if (latest_ack == NULL) {
9330 if (latest_ack->last_sent_to != NULL &&
9331 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9332 /* we're doing a retransmission */
9333 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9336 if (stcb->asoc.last_control_chunk_from == NULL) {
9337 if (stcb->asoc.alternate) {
9338 net = stcb->asoc.alternate;
9340 net = stcb->asoc.primary_destination;
9343 net = stcb->asoc.last_control_chunk_from;
9348 if (stcb->asoc.last_control_chunk_from == NULL) {
9349 if (stcb->asoc.alternate) {
9350 net = stcb->asoc.alternate;
9352 net = stcb->asoc.primary_destination;
9355 net = stcb->asoc.last_control_chunk_from;
9358 latest_ack->last_sent_to = net;
9360 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9361 if (ack->data == NULL) {
9364 /* copy the asconf_ack */
9365 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9366 if (m_ack == NULL) {
9367 /* couldn't copy it */
9370 #ifdef SCTP_MBUF_LOGGING
9371 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9372 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9376 sctp_alloc_a_chunk(stcb, chk);
9380 sctp_m_freem(m_ack);
9383 chk->copy_by_ref = 0;
9384 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9385 chk->rec.chunk_id.can_take_data = 1;
9386 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9389 atomic_add_int(&chk->whoTo->ref_count, 1);
9392 chk->send_size = ack->len;
9393 chk->sent = SCTP_DATAGRAM_UNSENT;
9395 chk->asoc = &stcb->asoc;
9397 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9398 chk->asoc->ctrl_queue_cnt++;
9405 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9406 struct sctp_tcb *stcb,
9407 struct sctp_association *asoc,
9408 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9409 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9415 * send out one MTU of retransmission. If fast_retransmit is
9416 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9417 * rwnd. For a Cookie or Asconf in the control chunk queue we
9418 * retransmit them by themselves.
9420 * For data chunks we will pick out the lowest TSN's in the sent_queue
9421 * marked for resend and bundle them all together (up to a MTU of
9422 * destination). The address to send to should have been
9423 * selected/changed where the retransmission was marked (i.e. in FR
9424 * or t3-timeout routines).
9426 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9427 struct sctp_tmit_chunk *chk, *fwd;
9428 struct mbuf *m, *endofchain;
9429 struct sctp_nets *net = NULL;
9430 uint32_t tsns_sent = 0;
9431 int no_fragmentflg, bundle_at, cnt_thru;
9433 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9434 struct sctp_auth_chunk *auth = NULL;
9435 uint32_t auth_offset = 0;
9436 uint16_t auth_keyid;
9437 int override_ok = 1;
9438 int data_auth_reqd = 0;
9441 SCTP_TCB_LOCK_ASSERT(stcb);
9442 tmr_started = ctl_cnt = bundle_at = error = 0;
9447 endofchain = m = NULL;
9448 auth_keyid = stcb->asoc.authinfo.active_keyid;
9449 #ifdef SCTP_AUDITING_ENABLED
9450 sctp_audit_log(0xC3, 1);
9452 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9453 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9454 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9455 asoc->sent_queue_retran_cnt);
9456 asoc->sent_queue_cnt = 0;
9457 asoc->sent_queue_cnt_removeable = 0;
9458 /* send back 0/0 so we enter normal transmission */
9462 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9463 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9464 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9465 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9466 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9469 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9470 if (chk != asoc->str_reset) {
9472 * not eligible for retran if its
9479 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9483 * Add an AUTH chunk, if chunk requires it save the
9484 * offset into the chain for AUTH
9486 if ((auth == NULL) &&
9487 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9488 stcb->asoc.peer_auth_chunks))) {
9489 m = sctp_add_auth_chunk(m, &endofchain,
9490 &auth, &auth_offset,
9492 chk->rec.chunk_id.id);
9493 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9495 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9501 /* do we have control chunks to retransmit? */
9503 /* Start a timer no matter if we succeed or fail */
9504 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9505 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9506 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9507 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9508 chk->snd_count++; /* update our count */
9509 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9510 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9511 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9512 no_fragmentflg, 0, 0,
9513 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9514 chk->whoTo->port, NULL,
9517 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9518 if (error == ENOBUFS) {
9519 asoc->ifp_had_enobuf = 1;
9520 SCTP_STAT_INCR(sctps_lowlevelerr);
9524 asoc->ifp_had_enobuf = 0;
9530 * We don't want to mark the net->sent time here since this
9531 * we use this for HB and retrans cannot measure RTT
9533 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9535 chk->sent = SCTP_DATAGRAM_SENT;
9536 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9540 /* Clean up the fwd-tsn list */
9541 sctp_clean_up_ctl(stcb, asoc, so_locked);
9546 * Ok, it is just data retransmission we need to do or that and a
9547 * fwd-tsn with it all.
9549 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9550 return (SCTP_RETRAN_DONE);
9552 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9553 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9554 /* not yet open, resend the cookie and that is it */
9557 #ifdef SCTP_AUDITING_ENABLED
9558 sctp_auditing(20, inp, stcb, NULL);
9560 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9561 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9562 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9563 /* No, not sent to this net or not ready for rtx */
9566 if (chk->data == NULL) {
9567 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9568 chk->rec.data.tsn, chk->snd_count, chk->sent);
9571 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9572 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9573 struct mbuf *op_err;
9574 char msg[SCTP_DIAG_INFO_LEN];
9576 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9577 chk->rec.data.tsn, chk->snd_count);
9578 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9580 atomic_add_int(&stcb->asoc.refcnt, 1);
9581 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9583 SCTP_TCB_LOCK(stcb);
9584 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9585 return (SCTP_RETRAN_EXIT);
9587 /* pick up the net */
9589 switch (net->ro._l_addr.sa.sa_family) {
9592 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9597 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9606 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9607 /* No room in peers rwnd */
9610 tsn = asoc->last_acked_seq + 1;
9611 if (tsn == chk->rec.data.tsn) {
9613 * we make a special exception for this
9614 * case. The peer has no rwnd but is missing
9615 * the lowest chunk.. which is probably what
9616 * is holding up the rwnd.
9618 goto one_chunk_around;
9623 if (asoc->peers_rwnd < mtu) {
9625 if ((asoc->peers_rwnd == 0) &&
9626 (asoc->total_flight == 0)) {
9627 chk->window_probe = 1;
9628 chk->whoTo->window_probe = 1;
9631 #ifdef SCTP_AUDITING_ENABLED
9632 sctp_audit_log(0xC3, 2);
9636 net->fast_retran_ip = 0;
9637 if (chk->rec.data.doing_fast_retransmit == 0) {
9639 * if no FR in progress skip destination that have
9640 * flight_size > cwnd.
9642 if (net->flight_size >= net->cwnd) {
9647 * Mark the destination net to have FR recovery
9651 net->fast_retran_ip = 1;
9655 * if no AUTH is yet included and this chunk requires it,
9656 * make sure to account for it. We don't apply the size
9657 * until the AUTH chunk is actually added below in case
9658 * there is no room for this chunk.
9660 if (data_auth_reqd && (auth == NULL)) {
9661 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9665 if ((chk->send_size <= (mtu - dmtu)) ||
9666 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9667 /* ok we will add this one */
9668 if (data_auth_reqd) {
9670 m = sctp_add_auth_chunk(m,
9676 auth_keyid = chk->auth_keyid;
9678 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9679 } else if (override_ok) {
9680 auth_keyid = chk->auth_keyid;
9682 } else if (chk->auth_keyid != auth_keyid) {
9683 /* different keyid, so done bundling */
9687 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9689 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9692 /* Do clear IP_DF ? */
9693 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9696 /* upate our MTU size */
9697 if (mtu > (chk->send_size + dmtu))
9698 mtu -= (chk->send_size + dmtu);
9701 data_list[bundle_at++] = chk;
9702 if (one_chunk && (asoc->total_flight <= 0)) {
9703 SCTP_STAT_INCR(sctps_windowprobed);
9706 if (one_chunk == 0) {
9708 * now are there anymore forward from chk to pick
9711 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9712 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9713 /* Nope, not for retran */
9716 if (fwd->whoTo != net) {
9717 /* Nope, not the net in question */
9720 if (data_auth_reqd && (auth == NULL)) {
9721 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9724 if (fwd->send_size <= (mtu - dmtu)) {
9725 if (data_auth_reqd) {
9727 m = sctp_add_auth_chunk(m,
9733 auth_keyid = fwd->auth_keyid;
9735 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9736 } else if (override_ok) {
9737 auth_keyid = fwd->auth_keyid;
9739 } else if (fwd->auth_keyid != auth_keyid) {
9747 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9749 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9752 /* Do clear IP_DF ? */
9753 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9756 /* upate our MTU size */
9757 if (mtu > (fwd->send_size + dmtu))
9758 mtu -= (fwd->send_size + dmtu);
9761 data_list[bundle_at++] = fwd;
9762 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9766 /* can't fit so we are done */
9771 /* Is there something to send for this destination? */
9774 * No matter if we fail/or succeed we should start a
9775 * timer. A failure is like a lost IP packet :-)
9777 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9779 * no timer running on this destination
9782 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9785 /* Now lets send it, if there is anything to send :> */
9786 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9787 (struct sockaddr *)&net->ro._l_addr, m,
9788 auth_offset, auth, auth_keyid,
9789 no_fragmentflg, 0, 0,
9790 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9794 /* error, we could not output */
9795 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
9796 if (error == ENOBUFS) {
9797 asoc->ifp_had_enobuf = 1;
9798 SCTP_STAT_INCR(sctps_lowlevelerr);
9802 asoc->ifp_had_enobuf = 0;
9809 * We don't want to mark the net->sent time here
9810 * since this we use this for HB and retrans cannot
9813 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9815 /* For auto-close */
9817 if (*now_filled == 0) {
9818 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9819 *now = asoc->time_last_sent;
9822 asoc->time_last_sent = *now;
9824 *cnt_out += bundle_at;
9825 #ifdef SCTP_AUDITING_ENABLED
9826 sctp_audit_log(0xC4, bundle_at);
9829 tsns_sent = data_list[0]->rec.data.tsn;
9831 for (i = 0; i < bundle_at; i++) {
9832 SCTP_STAT_INCR(sctps_sendretransdata);
9833 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9835 * When we have a revoked data, and we
9836 * retransmit it, then we clear the revoked
9837 * flag since this flag dictates if we
9838 * subtracted from the fs
9840 if (data_list[i]->rec.data.chunk_was_revoked) {
9841 /* Deflate the cwnd */
9842 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9843 data_list[i]->rec.data.chunk_was_revoked = 0;
9845 data_list[i]->snd_count++;
9846 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9847 /* record the time */
9848 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9849 if (data_list[i]->book_size_scale) {
9851 * need to double the book size on
9854 data_list[i]->book_size_scale = 0;
9856 * Since we double the booksize, we
9857 * must also double the output queue
9858 * size, since this get shrunk when
9859 * we free by this amount.
9861 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9862 data_list[i]->book_size *= 2;
9866 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9867 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9868 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9870 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9871 (uint32_t)(data_list[i]->send_size +
9872 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9874 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9875 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9876 data_list[i]->whoTo->flight_size,
9877 data_list[i]->book_size,
9878 (uint32_t)(uintptr_t)data_list[i]->whoTo,
9879 data_list[i]->rec.data.tsn);
9881 sctp_flight_size_increase(data_list[i]);
9882 sctp_total_flight_increase(stcb, data_list[i]);
9883 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9884 /* SWS sender side engages */
9885 asoc->peers_rwnd = 0;
9888 (data_list[i]->rec.data.doing_fast_retransmit)) {
9889 SCTP_STAT_INCR(sctps_sendfastretrans);
9890 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9891 (tmr_started == 0)) {
9893 * ok we just fast-retrans'd
9894 * the lowest TSN, i.e the
9895 * first on the list. In
9896 * this case we want to give
9897 * some more time to get a
9898 * SACK back without a
9901 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9902 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9903 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9907 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9908 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9910 #ifdef SCTP_AUDITING_ENABLED
9911 sctp_auditing(21, inp, stcb, NULL);
9917 if (asoc->sent_queue_retran_cnt <= 0) {
9918 /* all done we have no more to retran */
9919 asoc->sent_queue_retran_cnt = 0;
9923 /* No more room in rwnd */
9926 /* stop the for loop here. we sent out a packet */
9933 sctp_timer_validation(struct sctp_inpcb *inp,
9934 struct sctp_tcb *stcb,
9935 struct sctp_association *asoc)
9937 struct sctp_nets *net;
9939 /* Validate that a timer is running somewhere */
9940 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9941 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9942 /* Here is a timer */
9946 SCTP_TCB_LOCK_ASSERT(stcb);
9947 /* Gak, we did not have a timer somewhere */
9948 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9949 if (asoc->alternate) {
9950 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9952 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9958 sctp_chunk_output(struct sctp_inpcb *inp,
9959 struct sctp_tcb *stcb,
9962 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9968 * Ok this is the generic chunk service queue. we must do the
9970 * - See if there are retransmits pending, if so we must
9972 * - Service the stream queue that is next, moving any
9973 * message (note I must get a complete message i.e.
9974 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9976 * - Check to see if the cwnd/rwnd allows any output, if so we
9977 * go ahead and fomulate and send the low level chunks. Making sure
9978 * to combine any control in the control chunk queue also.
9980 struct sctp_association *asoc;
9981 struct sctp_nets *net;
9982 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9983 unsigned int burst_cnt = 0;
9987 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9990 unsigned int tot_frs = 0;
9994 /* The Nagle algorithm is only applied when handling a send call. */
9995 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9996 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10004 SCTP_TCB_LOCK_ASSERT(stcb);
10006 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10008 if ((un_sent <= 0) &&
10009 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10010 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10011 (asoc->sent_queue_retran_cnt == 0) &&
10012 (asoc->trigger_reset == 0)) {
10013 /* Nothing to do unless there is something to be sent left */
10017 * Do we have something to send, data or control AND a sack timer
10018 * running, if so piggy-back the sack.
10020 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10021 sctp_send_sack(stcb, so_locked);
10022 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10024 while (asoc->sent_queue_retran_cnt) {
10026 * Ok, it is retransmission time only, we send out only ONE
10027 * packet with a single call off to the retran code.
10029 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10031 * Special hook for handling cookiess discarded
10032 * by peer that carried data. Send cookie-ack only
10033 * and then the next call with get the retran's.
10035 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10037 &now, &now_filled, frag_point, so_locked);
10039 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10040 /* if its not from a HB then do it */
10042 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10048 * its from any other place, we don't allow retran
10049 * output (only control)
10054 /* Can't send anymore */
10056 * now lets push out control by calling med-level
10057 * output once. this assures that we WILL send HB's
10060 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10062 &now, &now_filled, frag_point, so_locked);
10063 #ifdef SCTP_AUDITING_ENABLED
10064 sctp_auditing(8, inp, stcb, NULL);
10066 sctp_timer_validation(inp, stcb, asoc);
10071 * The count was off.. retran is not happening so do
10072 * the normal retransmission.
10074 #ifdef SCTP_AUDITING_ENABLED
10075 sctp_auditing(9, inp, stcb, NULL);
10077 if (ret == SCTP_RETRAN_EXIT) {
10082 if (from_where == SCTP_OUTPUT_FROM_T3) {
10083 /* Only one transmission allowed out of a timeout */
10084 #ifdef SCTP_AUDITING_ENABLED
10085 sctp_auditing(10, inp, stcb, NULL);
10087 /* Push out any control */
10088 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10089 &now, &now_filled, frag_point, so_locked);
10092 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10093 /* Hit FR burst limit */
10096 if ((num_out == 0) && (ret == 0)) {
10097 /* No more retrans to send */
10101 #ifdef SCTP_AUDITING_ENABLED
10102 sctp_auditing(12, inp, stcb, NULL);
10104 /* Check for bad destinations, if they exist move chunks around. */
10105 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10106 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10108 * if possible move things off of this address we
10109 * still may send below due to the dormant state but
10110 * we try to find an alternate address to send to
10111 * and if we have one we move all queued data on the
10112 * out wheel to this alternate address.
10114 if (net->ref_count > 1)
10115 sctp_move_chunks_from_net(stcb, net);
10118 * if ((asoc->sat_network) || (net->addr_is_local))
10119 * { burst_limit = asoc->max_burst *
10120 * SCTP_SAT_NETWORK_BURST_INCR; }
10122 if (asoc->max_burst > 0) {
10123 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10124 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10126 * JRS - Use the congestion
10127 * control given in the
10128 * congestion control module
10130 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10131 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10132 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10134 SCTP_STAT_INCR(sctps_maxburstqueued);
10136 net->fast_retran_ip = 0;
10138 if (net->flight_size == 0) {
10140 * Should be decaying the
10152 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10153 &reason_code, 0, from_where,
10154 &now, &now_filled, frag_point, so_locked);
10156 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10157 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10158 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10160 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10161 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10162 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10166 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10168 tot_out += num_out;
10170 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10171 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10172 if (num_out == 0) {
10173 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10178 * When the Nagle algorithm is used, look at how
10179 * much is unsent, then if its smaller than an MTU
10180 * and we have data in flight we stop, except if we
10181 * are handling a fragmented user message.
10183 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
10184 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10185 (stcb->asoc.total_flight > 0)) {
10186 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10190 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10191 TAILQ_EMPTY(&asoc->send_queue) &&
10192 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10193 /* Nothing left to send */
10196 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10197 /* Nothing left to send */
10200 } while (num_out &&
10201 ((asoc->max_burst == 0) ||
10202 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10203 (burst_cnt < asoc->max_burst)));
10205 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10206 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10207 SCTP_STAT_INCR(sctps_maxburstqueued);
10208 asoc->burst_limit_applied = 1;
10209 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10210 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10213 asoc->burst_limit_applied = 0;
10216 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10217 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10219 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10223 * Now we need to clean up the control chunk chain if a ECNE is on
10224 * it. It must be marked as UNSENT again so next call will continue
10225 * to send it until such time that we get a CWR, to remove it.
10227 if (stcb->asoc.ecn_echo_cnt_onq)
10228 sctp_fix_ecn_echo(asoc);
10230 if (stcb->asoc.trigger_reset) {
10231 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10241 struct sctp_inpcb *inp,
10243 struct sockaddr *addr,
10244 struct mbuf *control,
10249 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10252 if (inp->sctp_socket == NULL) {
10253 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10256 return (sctp_sosend(inp->sctp_socket,
10258 (struct uio *)NULL,
10266 send_forward_tsn(struct sctp_tcb *stcb,
10267 struct sctp_association *asoc)
10269 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10270 struct sctp_forward_tsn_chunk *fwdtsn;
10271 struct sctp_strseq *strseq;
10272 struct sctp_strseq_mid *strseq_m;
10273 uint32_t advance_peer_ack_point;
10274 unsigned int cnt_of_space, i, ovh;
10275 unsigned int space_needed;
10276 unsigned int cnt_of_skipped = 0;
10278 SCTP_TCB_LOCK_ASSERT(stcb);
10279 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10280 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10281 /* mark it to unsent */
10282 chk->sent = SCTP_DATAGRAM_UNSENT;
10283 chk->snd_count = 0;
10284 /* Do we correct its output location? */
10286 sctp_free_remote_addr(chk->whoTo);
10289 goto sctp_fill_in_rest;
10292 /* Ok if we reach here we must build one */
10293 sctp_alloc_a_chunk(stcb, chk);
10297 asoc->fwd_tsn_cnt++;
10298 chk->copy_by_ref = 0;
10300 * We don't do the old thing here since this is used not for on-wire
10301 * but to tell if we are sending a fwd-tsn by the stack during
10302 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10304 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10305 chk->rec.chunk_id.can_take_data = 0;
10309 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10310 if (chk->data == NULL) {
10311 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10314 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10315 chk->sent = SCTP_DATAGRAM_UNSENT;
10316 chk->snd_count = 0;
10317 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10318 asoc->ctrl_queue_cnt++;
10321 * Here we go through and fill out the part that deals with
10322 * stream/seq of the ones we skip.
10324 SCTP_BUF_LEN(chk->data) = 0;
10325 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10326 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10327 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10328 /* no more to look at */
10331 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10332 /* We don't report these */
10337 if (asoc->idata_supported) {
10338 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10339 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10341 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10342 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10344 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10346 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10347 ovh = SCTP_MIN_OVERHEAD;
10349 ovh = SCTP_MIN_V4_OVERHEAD;
10351 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10352 /* trim to a mtu size */
10353 cnt_of_space = asoc->smallest_mtu - ovh;
10355 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10356 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10357 0xff, 0, cnt_of_skipped,
10358 asoc->advanced_peer_ack_point);
10360 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10361 if (cnt_of_space < space_needed) {
10363 * ok we must trim down the chunk by lowering the
10364 * advance peer ack point.
10366 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10367 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10368 0xff, 0xff, cnt_of_space,
10371 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10372 if (asoc->idata_supported) {
10373 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10375 cnt_of_skipped /= sizeof(struct sctp_strseq);
10378 * Go through and find the TSN that will be the one
10381 at = TAILQ_FIRST(&asoc->sent_queue);
10383 for (i = 0; i < cnt_of_skipped; i++) {
10384 tp1 = TAILQ_NEXT(at, sctp_next);
10391 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10392 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10393 0xff, cnt_of_skipped, at->rec.data.tsn,
10394 asoc->advanced_peer_ack_point);
10398 * last now points to last one I can report, update
10402 advance_peer_ack_point = last->rec.data.tsn;
10404 if (asoc->idata_supported) {
10405 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10406 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10408 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10409 cnt_of_skipped * sizeof(struct sctp_strseq);
10412 chk->send_size = space_needed;
10413 /* Setup the chunk */
10414 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10415 fwdtsn->ch.chunk_length = htons(chk->send_size);
10416 fwdtsn->ch.chunk_flags = 0;
10417 if (asoc->idata_supported) {
10418 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10420 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10422 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10423 SCTP_BUF_LEN(chk->data) = chk->send_size;
10426 * Move pointer to after the fwdtsn and transfer to the
10429 if (asoc->idata_supported) {
10430 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10433 strseq = (struct sctp_strseq *)fwdtsn;
10437 * Now populate the strseq list. This is done blindly
10438 * without pulling out duplicate stream info. This is
10439 * inefficent but won't harm the process since the peer will
10440 * look at these in sequence and will thus release anything.
10441 * It could mean we exceed the PMTU and chop off some that
10442 * we could have included.. but this is unlikely (aka 1432/4
10443 * would mean 300+ stream seq's would have to be reported in
10444 * one FWD-TSN. With a bit of work we can later FIX this to
10445 * optimize and pull out duplicates.. but it does add more
10446 * overhead. So for now... not!
10449 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10450 if (i >= cnt_of_skipped) {
10453 if (!asoc->idata_supported && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10454 /* We don't report these */
10457 if (at->rec.data.tsn == advance_peer_ack_point) {
10458 at->rec.data.fwd_tsn_cnt = 0;
10460 if (asoc->idata_supported) {
10461 strseq_m->sid = htons(at->rec.data.sid);
10462 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10463 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10465 strseq_m->flags = 0;
10467 strseq_m->mid = htonl(at->rec.data.mid);
10470 strseq->sid = htons(at->rec.data.sid);
10471 strseq->ssn = htons((uint16_t)at->rec.data.mid);
10480 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10481 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10487 * Queue up a SACK or NR-SACK in the control queue.
10488 * We must first check to see if a SACK or NR-SACK is
10489 * somehow on the control queue.
10490 * If so, we will take and and remove the old one.
10492 struct sctp_association *asoc;
10493 struct sctp_tmit_chunk *chk, *a_chk;
10494 struct sctp_sack_chunk *sack;
10495 struct sctp_nr_sack_chunk *nr_sack;
10496 struct sctp_gap_ack_block *gap_descriptor;
10497 const struct sack_track *selector;
10502 int limit_reached = 0;
10503 unsigned int i, siz, j;
10504 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10507 uint32_t highest_tsn;
10512 if (stcb->asoc.nrsack_supported == 1) {
10513 type = SCTP_NR_SELECTIVE_ACK;
10515 type = SCTP_SELECTIVE_ACK;
10518 asoc = &stcb->asoc;
10519 SCTP_TCB_LOCK_ASSERT(stcb);
10520 if (asoc->last_data_chunk_from == NULL) {
10521 /* Hmm we never received anything */
10524 sctp_slide_mapping_arrays(stcb);
10525 sctp_set_rwnd(stcb, asoc);
10526 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10527 if (chk->rec.chunk_id.id == type) {
10528 /* Hmm, found a sack already on queue, remove it */
10529 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10530 asoc->ctrl_queue_cnt--;
10533 sctp_m_freem(a_chk->data);
10534 a_chk->data = NULL;
10536 if (a_chk->whoTo) {
10537 sctp_free_remote_addr(a_chk->whoTo);
10538 a_chk->whoTo = NULL;
10543 if (a_chk == NULL) {
10544 sctp_alloc_a_chunk(stcb, a_chk);
10545 if (a_chk == NULL) {
10546 /* No memory so we drop the idea, and set a timer */
10547 if (stcb->asoc.delayed_ack) {
10548 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10549 stcb->sctp_ep, stcb, NULL,
10550 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10551 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10552 stcb->sctp_ep, stcb, NULL);
10554 stcb->asoc.send_sack = 1;
10558 a_chk->copy_by_ref = 0;
10559 a_chk->rec.chunk_id.id = type;
10560 a_chk->rec.chunk_id.can_take_data = 1;
10562 /* Clear our pkt counts */
10563 asoc->data_pkts_seen = 0;
10566 a_chk->asoc = asoc;
10567 a_chk->snd_count = 0;
10568 a_chk->send_size = 0; /* fill in later */
10569 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10570 a_chk->whoTo = NULL;
10572 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10574 * Ok, the destination for the SACK is unreachable, lets see if
10575 * we can select an alternate to asoc->last_data_chunk_from
10577 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10578 if (a_chk->whoTo == NULL) {
10579 /* Nope, no alternate */
10580 a_chk->whoTo = asoc->last_data_chunk_from;
10583 a_chk->whoTo = asoc->last_data_chunk_from;
10585 if (a_chk->whoTo) {
10586 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10588 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10589 highest_tsn = asoc->highest_tsn_inside_map;
10591 highest_tsn = asoc->highest_tsn_inside_nr_map;
10593 if (highest_tsn == asoc->cumulative_tsn) {
10595 if (type == SCTP_SELECTIVE_ACK) {
10596 space_req = sizeof(struct sctp_sack_chunk);
10598 space_req = sizeof(struct sctp_nr_sack_chunk);
10601 /* gaps get a cluster */
10602 space_req = MCLBYTES;
10604 /* Ok now lets formulate a MBUF with our sack */
10605 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10606 if ((a_chk->data == NULL) ||
10607 (a_chk->whoTo == NULL)) {
10608 /* rats, no mbuf memory */
10610 /* was a problem with the destination */
10611 sctp_m_freem(a_chk->data);
10612 a_chk->data = NULL;
10614 sctp_free_a_chunk(stcb, a_chk, so_locked);
10615 /* sa_ignore NO_NULL_CHK */
10616 if (stcb->asoc.delayed_ack) {
10617 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10618 stcb->sctp_ep, stcb, NULL,
10619 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10620 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10621 stcb->sctp_ep, stcb, NULL);
10623 stcb->asoc.send_sack = 1;
10627 /* ok, lets go through and fill it in */
10628 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10629 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10630 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10631 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10633 limit = mtod(a_chk->data, caddr_t);
10638 if ((asoc->sctp_cmt_on_off > 0) &&
10639 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10641 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10642 * received, then set high bit to 1, else 0. Reset
10645 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10646 asoc->cmt_dac_pkts_rcvd = 0;
10648 #ifdef SCTP_ASOCLOG_OF_TSNS
10649 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10650 stcb->asoc.cumack_log_atsnt++;
10651 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10652 stcb->asoc.cumack_log_atsnt = 0;
10655 /* reset the readers interpretation */
10656 stcb->freed_by_sorcv_sincelast = 0;
10658 if (type == SCTP_SELECTIVE_ACK) {
10659 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10661 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10662 if (highest_tsn > asoc->mapping_array_base_tsn) {
10663 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10665 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10669 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10670 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10671 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10672 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10674 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10678 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10681 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10683 if (((type == SCTP_SELECTIVE_ACK) &&
10684 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10685 ((type == SCTP_NR_SELECTIVE_ACK) &&
10686 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10687 /* we have a gap .. maybe */
10688 for (i = 0; i < siz; i++) {
10689 tsn_map = asoc->mapping_array[i];
10690 if (type == SCTP_SELECTIVE_ACK) {
10691 tsn_map |= asoc->nr_mapping_array[i];
10695 * Clear all bits corresponding to TSNs
10696 * smaller or equal to the cumulative TSN.
10698 tsn_map &= (~0U << (1 - offset));
10700 selector = &sack_array[tsn_map];
10701 if (mergeable && selector->right_edge) {
10703 * Backup, left and right edges were ok to
10709 if (selector->num_entries == 0)
10712 for (j = 0; j < selector->num_entries; j++) {
10713 if (mergeable && selector->right_edge) {
10715 * do a merge by NOT setting
10721 * no merge, set the left
10725 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10727 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10730 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10736 if (selector->left_edge) {
10740 if (limit_reached) {
10741 /* Reached the limit stop */
10747 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10748 (limit_reached == 0)) {
10752 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10753 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10755 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10758 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10761 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10763 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10764 /* we have a gap .. maybe */
10765 for (i = 0; i < siz; i++) {
10766 tsn_map = asoc->nr_mapping_array[i];
10769 * Clear all bits corresponding to
10770 * TSNs smaller or equal to the
10773 tsn_map &= (~0U << (1 - offset));
10775 selector = &sack_array[tsn_map];
10776 if (mergeable && selector->right_edge) {
10778 * Backup, left and right edges were
10781 num_nr_gap_blocks--;
10784 if (selector->num_entries == 0)
10787 for (j = 0; j < selector->num_entries; j++) {
10788 if (mergeable && selector->right_edge) {
10790 * do a merge by NOT
10797 * no merge, set the
10801 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10803 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10804 num_nr_gap_blocks++;
10806 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10812 if (selector->left_edge) {
10816 if (limit_reached) {
10817 /* Reached the limit stop */
10824 /* now we must add any dups we are going to report. */
10825 if ((limit_reached == 0) && (asoc->numduptsns)) {
10826 dup = (uint32_t *)gap_descriptor;
10827 for (i = 0; i < asoc->numduptsns; i++) {
10828 *dup = htonl(asoc->dup_tsns[i]);
10831 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10836 asoc->numduptsns = 0;
10839 * now that the chunk is prepared queue it to the control chunk
10842 if (type == SCTP_SELECTIVE_ACK) {
10843 a_chk->send_size = (uint16_t)(sizeof(struct sctp_sack_chunk) +
10844 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10845 num_dups * sizeof(int32_t));
10846 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10847 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10848 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10849 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10850 sack->sack.num_dup_tsns = htons(num_dups);
10851 sack->ch.chunk_type = type;
10852 sack->ch.chunk_flags = flags;
10853 sack->ch.chunk_length = htons(a_chk->send_size);
10855 a_chk->send_size = (uint16_t)(sizeof(struct sctp_nr_sack_chunk) +
10856 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10857 num_dups * sizeof(int32_t));
10858 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10859 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10860 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10861 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10862 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10863 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10864 nr_sack->nr_sack.reserved = 0;
10865 nr_sack->ch.chunk_type = type;
10866 nr_sack->ch.chunk_flags = flags;
10867 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10869 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10870 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10871 asoc->ctrl_queue_cnt++;
10872 asoc->send_sack = 0;
10873 SCTP_STAT_INCR(sctps_sendsacks);
10878 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10879 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10884 struct mbuf *m_abort, *m, *m_last;
10885 struct mbuf *m_out, *m_end = NULL;
10886 struct sctp_abort_chunk *abort;
10887 struct sctp_auth_chunk *auth = NULL;
10888 struct sctp_nets *net;
10890 uint32_t auth_offset = 0;
10892 uint16_t cause_len, chunk_len, padding_len;
10894 SCTP_TCB_LOCK_ASSERT(stcb);
10896 * Add an AUTH chunk, if chunk requires it and save the offset into
10897 * the chain for AUTH
10899 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10900 stcb->asoc.peer_auth_chunks)) {
10901 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10902 stcb, SCTP_ABORT_ASSOCIATION);
10903 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10907 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10908 if (m_abort == NULL) {
10910 sctp_m_freem(m_out);
10913 sctp_m_freem(operr);
10917 /* link in any error */
10918 SCTP_BUF_NEXT(m_abort) = operr;
10921 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10922 cause_len += (uint16_t)SCTP_BUF_LEN(m);
10923 if (SCTP_BUF_NEXT(m) == NULL) {
10927 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10928 chunk_len = (uint16_t)sizeof(struct sctp_abort_chunk) + cause_len;
10929 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10930 if (m_out == NULL) {
10931 /* NO Auth chunk prepended, so reserve space in front */
10932 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10935 /* Put AUTH chunk at the front of the chain */
10936 SCTP_BUF_NEXT(m_end) = m_abort;
10938 if (stcb->asoc.alternate) {
10939 net = stcb->asoc.alternate;
10941 net = stcb->asoc.primary_destination;
10943 /* Fill in the ABORT chunk header. */
10944 abort = mtod(m_abort, struct sctp_abort_chunk *);
10945 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10946 if (stcb->asoc.peer_vtag == 0) {
10947 /* This happens iff the assoc is in COOKIE-WAIT state. */
10948 vtag = stcb->asoc.my_vtag;
10949 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10951 vtag = stcb->asoc.peer_vtag;
10952 abort->ch.chunk_flags = 0;
10954 abort->ch.chunk_length = htons(chunk_len);
10955 /* Add padding, if necessary. */
10956 if (padding_len > 0) {
10957 if ((m_last == NULL) ||
10958 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10959 sctp_m_freem(m_out);
10963 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10964 (struct sockaddr *)&net->ro._l_addr,
10965 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10966 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10967 stcb->asoc.primary_destination->port, NULL,
10970 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
10971 if (error == ENOBUFS) {
10972 stcb->asoc.ifp_had_enobuf = 1;
10973 SCTP_STAT_INCR(sctps_lowlevelerr);
10976 stcb->asoc.ifp_had_enobuf = 0;
10978 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10982 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10983 struct sctp_nets *net,
10986 /* formulate and SEND a SHUTDOWN-COMPLETE */
10987 struct mbuf *m_shutdown_comp;
10988 struct sctp_shutdown_complete_chunk *shutdown_complete;
10993 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10994 if (m_shutdown_comp == NULL) {
10998 if (reflect_vtag) {
10999 flags = SCTP_HAD_NO_TCB;
11000 vtag = stcb->asoc.my_vtag;
11003 vtag = stcb->asoc.peer_vtag;
11005 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11006 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11007 shutdown_complete->ch.chunk_flags = flags;
11008 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11009 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11010 if ((error = sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11011 (struct sockaddr *)&net->ro._l_addr,
11012 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11013 stcb->sctp_ep->sctp_lport, stcb->rport,
11017 SCTP_SO_NOT_LOCKED))) {
11018 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
11019 if (error == ENOBUFS) {
11020 stcb->asoc.ifp_had_enobuf = 1;
11021 SCTP_STAT_INCR(sctps_lowlevelerr);
11024 stcb->asoc.ifp_had_enobuf = 0;
11026 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11031 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11032 struct sctphdr *sh, uint32_t vtag,
11033 uint8_t type, struct mbuf *cause,
11034 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11035 uint32_t vrf_id, uint16_t port)
11037 struct mbuf *o_pak;
11039 struct sctphdr *shout;
11040 struct sctp_chunkhdr *ch;
11041 #if defined(INET) || defined(INET6)
11042 struct udphdr *udp;
11045 int len, cause_len, padding_len;
11047 struct sockaddr_in *src_sin, *dst_sin;
11051 struct sockaddr_in6 *src_sin6, *dst_sin6;
11052 struct ip6_hdr *ip6;
11055 /* Compute the length of the cause and add final padding. */
11057 if (cause != NULL) {
11058 struct mbuf *m_at, *m_last = NULL;
11060 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11061 if (SCTP_BUF_NEXT(m_at) == NULL)
11063 cause_len += SCTP_BUF_LEN(m_at);
11065 padding_len = cause_len % 4;
11066 if (padding_len != 0) {
11067 padding_len = 4 - padding_len;
11069 if (padding_len != 0) {
11070 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11071 sctp_m_freem(cause);
11078 /* Get an mbuf for the header. */
11079 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11080 switch (dst->sa_family) {
11083 len += sizeof(struct ip);
11088 len += sizeof(struct ip6_hdr);
11094 #if defined(INET) || defined(INET6)
11096 len += sizeof(struct udphdr);
11099 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11100 if (mout == NULL) {
11102 sctp_m_freem(cause);
11106 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11107 SCTP_BUF_LEN(mout) = len;
11108 SCTP_BUF_NEXT(mout) = cause;
11109 M_SETFIB(mout, fibnum);
11110 mout->m_pkthdr.flowid = mflowid;
11111 M_HASHTYPE_SET(mout, mflowtype);
11118 switch (dst->sa_family) {
11121 src_sin = (struct sockaddr_in *)src;
11122 dst_sin = (struct sockaddr_in *)dst;
11123 ip = mtod(mout, struct ip *);
11124 ip->ip_v = IPVERSION;
11125 ip->ip_hl = (sizeof(struct ip) >> 2);
11127 ip->ip_off = htons(IP_DF);
11129 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11131 ip->ip_p = IPPROTO_UDP;
11133 ip->ip_p = IPPROTO_SCTP;
11135 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11136 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11138 len = sizeof(struct ip);
11139 shout = (struct sctphdr *)((caddr_t)ip + len);
11144 src_sin6 = (struct sockaddr_in6 *)src;
11145 dst_sin6 = (struct sockaddr_in6 *)dst;
11146 ip6 = mtod(mout, struct ip6_hdr *);
11147 ip6->ip6_flow = htonl(0x60000000);
11148 if (V_ip6_auto_flowlabel) {
11149 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11151 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11153 ip6->ip6_nxt = IPPROTO_UDP;
11155 ip6->ip6_nxt = IPPROTO_SCTP;
11157 ip6->ip6_src = dst_sin6->sin6_addr;
11158 ip6->ip6_dst = src_sin6->sin6_addr;
11159 len = sizeof(struct ip6_hdr);
11160 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11165 shout = mtod(mout, struct sctphdr *);
11168 #if defined(INET) || defined(INET6)
11170 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11171 sctp_m_freem(mout);
11174 udp = (struct udphdr *)shout;
11175 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11176 udp->uh_dport = port;
11178 udp->uh_ulen = htons((uint16_t)(sizeof(struct udphdr) +
11179 sizeof(struct sctphdr) +
11180 sizeof(struct sctp_chunkhdr) +
11181 cause_len + padding_len));
11182 len += sizeof(struct udphdr);
11183 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11188 shout->src_port = sh->dest_port;
11189 shout->dest_port = sh->src_port;
11190 shout->checksum = 0;
11192 shout->v_tag = htonl(vtag);
11194 shout->v_tag = sh->v_tag;
11196 len += sizeof(struct sctphdr);
11197 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11198 ch->chunk_type = type;
11200 ch->chunk_flags = 0;
11202 ch->chunk_flags = SCTP_HAD_NO_TCB;
11204 ch->chunk_length = htons((uint16_t)(sizeof(struct sctp_chunkhdr) + cause_len));
11205 len += sizeof(struct sctp_chunkhdr);
11206 len += cause_len + padding_len;
11208 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11209 sctp_m_freem(mout);
11212 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11213 switch (dst->sa_family) {
11218 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11223 ip->ip_len = htons(len);
11225 #if defined(SCTP_WITH_NO_CSUM)
11226 SCTP_STAT_INCR(sctps_sendnocrc);
11228 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11229 SCTP_STAT_INCR(sctps_sendswcrc);
11232 SCTP_ENABLE_UDP_CSUM(o_pak);
11235 #if defined(SCTP_WITH_NO_CSUM)
11236 SCTP_STAT_INCR(sctps_sendnocrc);
11238 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11239 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11240 SCTP_STAT_INCR(sctps_sendhwcrc);
11243 #ifdef SCTP_PACKET_LOGGING
11244 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11245 sctp_packet_log(o_pak);
11248 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11253 ip6->ip6_plen = (uint16_t)(len - sizeof(struct ip6_hdr));
11255 #if defined(SCTP_WITH_NO_CSUM)
11256 SCTP_STAT_INCR(sctps_sendnocrc);
11258 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11259 SCTP_STAT_INCR(sctps_sendswcrc);
11261 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11262 udp->uh_sum = 0xffff;
11265 #if defined(SCTP_WITH_NO_CSUM)
11266 SCTP_STAT_INCR(sctps_sendnocrc);
11268 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11269 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11270 SCTP_STAT_INCR(sctps_sendhwcrc);
11273 #ifdef SCTP_PACKET_LOGGING
11274 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11275 sctp_packet_log(o_pak);
11278 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11282 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11284 sctp_m_freem(mout);
11285 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11288 SCTP_STAT_INCR(sctps_sendpackets);
11289 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11290 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11295 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11296 struct sctphdr *sh,
11297 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11298 uint32_t vrf_id, uint16_t port)
11300 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11301 mflowtype, mflowid, fibnum,
11306 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11307 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11312 struct sctp_tmit_chunk *chk;
11313 struct sctp_heartbeat_chunk *hb;
11314 struct timeval now;
11316 SCTP_TCB_LOCK_ASSERT(stcb);
11320 (void)SCTP_GETTIME_TIMEVAL(&now);
11321 switch (net->ro._l_addr.sa.sa_family) {
11333 sctp_alloc_a_chunk(stcb, chk);
11335 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11338 chk->copy_by_ref = 0;
11339 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11340 chk->rec.chunk_id.can_take_data = 1;
11342 chk->asoc = &stcb->asoc;
11343 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11345 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11346 if (chk->data == NULL) {
11347 sctp_free_a_chunk(stcb, chk, so_locked);
11350 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11351 SCTP_BUF_LEN(chk->data) = chk->send_size;
11352 chk->sent = SCTP_DATAGRAM_UNSENT;
11353 chk->snd_count = 0;
11355 atomic_add_int(&chk->whoTo->ref_count, 1);
11356 /* Now we have a mbuf that we can fill in with the details */
11357 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11358 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11359 /* fill out chunk header */
11360 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11361 hb->ch.chunk_flags = 0;
11362 hb->ch.chunk_length = htons(chk->send_size);
11363 /* Fill out hb parameter */
11364 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11365 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11366 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11367 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11368 /* Did our user request this one, put it in */
11369 hb->heartbeat.hb_info.addr_family = (uint8_t)net->ro._l_addr.sa.sa_family;
11370 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11371 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11373 * we only take from the entropy pool if the address is not
11376 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11377 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11379 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11380 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11382 switch (net->ro._l_addr.sa.sa_family) {
11385 memcpy(hb->heartbeat.hb_info.address,
11386 &net->ro._l_addr.sin.sin_addr,
11387 sizeof(net->ro._l_addr.sin.sin_addr));
11392 memcpy(hb->heartbeat.hb_info.address,
11393 &net->ro._l_addr.sin6.sin6_addr,
11394 sizeof(net->ro._l_addr.sin6.sin6_addr));
11399 sctp_m_freem(chk->data);
11402 sctp_free_a_chunk(stcb, chk, so_locked);
11406 net->hb_responded = 0;
11407 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11408 stcb->asoc.ctrl_queue_cnt++;
11409 SCTP_STAT_INCR(sctps_sendheartbeat);
11414 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11417 struct sctp_association *asoc;
11418 struct sctp_ecne_chunk *ecne;
11419 struct sctp_tmit_chunk *chk;
11424 asoc = &stcb->asoc;
11425 SCTP_TCB_LOCK_ASSERT(stcb);
11426 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11427 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11428 /* found a previous ECN_ECHO update it if needed */
11429 uint32_t cnt, ctsn;
11431 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11432 ctsn = ntohl(ecne->tsn);
11433 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11434 ecne->tsn = htonl(high_tsn);
11435 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11437 cnt = ntohl(ecne->num_pkts_since_cwr);
11439 ecne->num_pkts_since_cwr = htonl(cnt);
11443 /* nope could not find one to update so we must build one */
11444 sctp_alloc_a_chunk(stcb, chk);
11448 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11449 chk->copy_by_ref = 0;
11450 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11451 chk->rec.chunk_id.can_take_data = 0;
11453 chk->asoc = &stcb->asoc;
11454 chk->send_size = sizeof(struct sctp_ecne_chunk);
11455 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11456 if (chk->data == NULL) {
11457 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11460 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11461 SCTP_BUF_LEN(chk->data) = chk->send_size;
11462 chk->sent = SCTP_DATAGRAM_UNSENT;
11463 chk->snd_count = 0;
11465 atomic_add_int(&chk->whoTo->ref_count, 1);
11467 stcb->asoc.ecn_echo_cnt_onq++;
11468 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11469 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11470 ecne->ch.chunk_flags = 0;
11471 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11472 ecne->tsn = htonl(high_tsn);
11473 ecne->num_pkts_since_cwr = htonl(1);
11474 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11475 asoc->ctrl_queue_cnt++;
11479 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11480 struct mbuf *m, int len, int iphlen, int bad_crc)
11482 struct sctp_association *asoc;
11483 struct sctp_pktdrop_chunk *drp;
11484 struct sctp_tmit_chunk *chk;
11490 struct sctp_chunkhdr *ch, chunk_buf;
11491 unsigned int chk_length;
11496 asoc = &stcb->asoc;
11497 SCTP_TCB_LOCK_ASSERT(stcb);
11498 if (asoc->pktdrop_supported == 0) {
11500 * peer must declare support before I send one.
11504 if (stcb->sctp_socket == NULL) {
11507 sctp_alloc_a_chunk(stcb, chk);
11511 chk->copy_by_ref = 0;
11512 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11513 chk->rec.chunk_id.can_take_data = 1;
11516 chk->send_size = len;
11517 /* Validate that we do not have an ABORT in here. */
11518 offset = iphlen + sizeof(struct sctphdr);
11519 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11520 sizeof(*ch), (uint8_t *)&chunk_buf);
11521 while (ch != NULL) {
11522 chk_length = ntohs(ch->chunk_length);
11523 if (chk_length < sizeof(*ch)) {
11524 /* break to abort land */
11527 switch (ch->chunk_type) {
11528 case SCTP_PACKET_DROPPED:
11529 case SCTP_ABORT_ASSOCIATION:
11530 case SCTP_INITIATION_ACK:
11532 * We don't respond with an PKT-DROP to an ABORT
11533 * or PKT-DROP. We also do not respond to an
11534 * INIT-ACK, because we can't know if the initiation
11535 * tag is correct or not.
11537 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11542 offset += SCTP_SIZE32(chk_length);
11543 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11544 sizeof(*ch), (uint8_t *)&chunk_buf);
11547 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11548 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11550 * only send 1 mtu worth, trim off the excess on the end.
11553 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11556 chk->asoc = &stcb->asoc;
11557 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11558 if (chk->data == NULL) {
11560 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11563 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11564 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11566 sctp_m_freem(chk->data);
11570 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11571 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11572 chk->book_size_scale = 0;
11574 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11575 drp->trunc_len = htons(fullsz);
11577 * Len is already adjusted to size minus overhead above take
11578 * out the pkt_drop chunk itself from it.
11580 chk->send_size = (uint16_t)(len - sizeof(struct sctp_pktdrop_chunk));
11581 len = chk->send_size;
11583 /* no truncation needed */
11584 drp->ch.chunk_flags = 0;
11585 drp->trunc_len = htons(0);
11588 drp->ch.chunk_flags |= SCTP_BADCRC;
11590 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11591 SCTP_BUF_LEN(chk->data) = chk->send_size;
11592 chk->sent = SCTP_DATAGRAM_UNSENT;
11593 chk->snd_count = 0;
11595 /* we should hit here */
11597 atomic_add_int(&chk->whoTo->ref_count, 1);
11601 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11602 drp->ch.chunk_length = htons(chk->send_size);
11603 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11607 drp->bottle_bw = htonl(spc);
11608 if (asoc->my_rwnd) {
11609 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11610 asoc->size_on_all_streams +
11611 asoc->my_rwnd_control_len +
11612 stcb->sctp_socket->so_rcv.sb_cc);
11615 * If my rwnd is 0, possibly from mbuf depletion as well as
11616 * space used, tell the peer there is NO space aka onq == bw
11618 drp->current_onq = htonl(spc);
11622 m_copydata(m, iphlen, len, (caddr_t)datap);
11623 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11624 asoc->ctrl_queue_cnt++;
11628 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11630 struct sctp_association *asoc;
11631 struct sctp_cwr_chunk *cwr;
11632 struct sctp_tmit_chunk *chk;
11634 SCTP_TCB_LOCK_ASSERT(stcb);
11638 asoc = &stcb->asoc;
11639 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11640 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11642 * found a previous CWR queued to same destination
11643 * update it if needed
11647 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11648 ctsn = ntohl(cwr->tsn);
11649 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11650 cwr->tsn = htonl(high_tsn);
11652 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11653 /* Make sure override is carried */
11654 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11659 sctp_alloc_a_chunk(stcb, chk);
11663 chk->copy_by_ref = 0;
11664 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11665 chk->rec.chunk_id.can_take_data = 1;
11667 chk->asoc = &stcb->asoc;
11668 chk->send_size = sizeof(struct sctp_cwr_chunk);
11669 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11670 if (chk->data == NULL) {
11671 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11674 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11675 SCTP_BUF_LEN(chk->data) = chk->send_size;
11676 chk->sent = SCTP_DATAGRAM_UNSENT;
11677 chk->snd_count = 0;
11679 atomic_add_int(&chk->whoTo->ref_count, 1);
11680 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11681 cwr->ch.chunk_type = SCTP_ECN_CWR;
11682 cwr->ch.chunk_flags = override;
11683 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11684 cwr->tsn = htonl(high_tsn);
11685 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11686 asoc->ctrl_queue_cnt++;
11690 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11691 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11693 uint16_t len, old_len, i;
11694 struct sctp_stream_reset_out_request *req_out;
11695 struct sctp_chunkhdr *ch;
11697 int number_entries = 0;
11699 ch = mtod(chk->data, struct sctp_chunkhdr *);
11700 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11701 /* get to new offset for the param. */
11702 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11703 /* now how long will this param be? */
11704 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11705 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11706 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11707 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11711 if (number_entries == 0) {
11714 if (number_entries == stcb->asoc.streamoutcnt) {
11715 number_entries = 0;
11717 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11718 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11720 len = (uint16_t)(sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11721 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11722 req_out->ph.param_length = htons(len);
11723 req_out->request_seq = htonl(seq);
11724 req_out->response_seq = htonl(resp_seq);
11725 req_out->send_reset_at_tsn = htonl(last_sent);
11727 if (number_entries) {
11728 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11729 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11730 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11731 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11732 req_out->list_of_streams[at] = htons(i);
11734 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11735 if (at >= number_entries) {
11741 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11742 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11745 if (SCTP_SIZE32(len) > len) {
11747 * Need to worry about the pad we may end up adding to the
11748 * end. This is easy since the struct is either aligned to 4
11749 * bytes or 2 bytes off.
11751 req_out->list_of_streams[number_entries] = 0;
11753 /* now fix the chunk length */
11754 ch->chunk_length = htons(len + old_len);
11755 chk->book_size = len + old_len;
11756 chk->book_size_scale = 0;
11757 chk->send_size = SCTP_SIZE32(chk->book_size);
11758 SCTP_BUF_LEN(chk->data) = chk->send_size;
11763 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11764 int number_entries, uint16_t *list,
11767 uint16_t len, old_len, i;
11768 struct sctp_stream_reset_in_request *req_in;
11769 struct sctp_chunkhdr *ch;
11771 ch = mtod(chk->data, struct sctp_chunkhdr *);
11772 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11774 /* get to new offset for the param. */
11775 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11776 /* now how long will this param be? */
11777 len = (uint16_t)(sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11778 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11779 req_in->ph.param_length = htons(len);
11780 req_in->request_seq = htonl(seq);
11781 if (number_entries) {
11782 for (i = 0; i < number_entries; i++) {
11783 req_in->list_of_streams[i] = htons(list[i]);
11786 if (SCTP_SIZE32(len) > len) {
11788 * Need to worry about the pad we may end up adding to the
11789 * end. This is easy since the struct is either aligned to 4
11790 * bytes or 2 bytes off.
11792 req_in->list_of_streams[number_entries] = 0;
11794 /* now fix the chunk length */
11795 ch->chunk_length = htons(len + old_len);
11796 chk->book_size = len + old_len;
11797 chk->book_size_scale = 0;
11798 chk->send_size = SCTP_SIZE32(chk->book_size);
11799 SCTP_BUF_LEN(chk->data) = chk->send_size;
11804 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11807 uint16_t len, old_len;
11808 struct sctp_stream_reset_tsn_request *req_tsn;
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_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11816 /* now how long will this param be? */
11817 len = sizeof(struct sctp_stream_reset_tsn_request);
11818 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11819 req_tsn->ph.param_length = htons(len);
11820 req_tsn->request_seq = htonl(seq);
11822 /* now fix the chunk length */
11823 ch->chunk_length = htons(len + old_len);
11824 chk->send_size = len + old_len;
11825 chk->book_size = SCTP_SIZE32(chk->send_size);
11826 chk->book_size_scale = 0;
11827 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11832 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11833 uint32_t resp_seq, uint32_t result)
11835 uint16_t len, old_len;
11836 struct sctp_stream_reset_response *resp;
11837 struct sctp_chunkhdr *ch;
11839 ch = mtod(chk->data, struct sctp_chunkhdr *);
11840 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11842 /* get to new offset for the param. */
11843 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11844 /* now how long will this param be? */
11845 len = sizeof(struct sctp_stream_reset_response);
11846 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11847 resp->ph.param_length = htons(len);
11848 resp->response_seq = htonl(resp_seq);
11849 resp->result = ntohl(result);
11851 /* now fix the chunk length */
11852 ch->chunk_length = htons(len + old_len);
11853 chk->book_size = len + old_len;
11854 chk->book_size_scale = 0;
11855 chk->send_size = SCTP_SIZE32(chk->book_size);
11856 SCTP_BUF_LEN(chk->data) = chk->send_size;
11861 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11862 struct sctp_stream_reset_list *ent,
11865 struct sctp_association *asoc;
11866 struct sctp_tmit_chunk *chk;
11867 struct sctp_chunkhdr *ch;
11869 asoc = &stcb->asoc;
11872 * Reset our last reset action to the new one IP -> response
11873 * (PERFORMED probably). This assures that if we fail to send, a
11874 * retran from the peer will get the new response.
11876 asoc->last_reset_action[0] = response;
11877 if (asoc->stream_reset_outstanding) {
11880 sctp_alloc_a_chunk(stcb, chk);
11882 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11885 chk->copy_by_ref = 0;
11886 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11887 chk->rec.chunk_id.can_take_data = 0;
11889 chk->asoc = &stcb->asoc;
11890 chk->book_size = sizeof(struct sctp_chunkhdr);
11891 chk->send_size = SCTP_SIZE32(chk->book_size);
11892 chk->book_size_scale = 0;
11893 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11894 if (chk->data == NULL) {
11895 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11896 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11899 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11900 /* setup chunk parameters */
11901 chk->sent = SCTP_DATAGRAM_UNSENT;
11902 chk->snd_count = 0;
11903 if (stcb->asoc.alternate) {
11904 chk->whoTo = stcb->asoc.alternate;
11906 chk->whoTo = stcb->asoc.primary_destination;
11908 ch = mtod(chk->data, struct sctp_chunkhdr *);
11909 ch->chunk_type = SCTP_STREAM_RESET;
11910 ch->chunk_flags = 0;
11911 ch->chunk_length = htons(chk->book_size);
11912 atomic_add_int(&chk->whoTo->ref_count, 1);
11913 SCTP_BUF_LEN(chk->data) = chk->send_size;
11914 sctp_add_stream_reset_result(chk, ent->seq, response);
11915 /* insert the chunk for sending */
11916 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11919 asoc->ctrl_queue_cnt++;
11923 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11924 uint32_t resp_seq, uint32_t result,
11925 uint32_t send_una, uint32_t recv_next)
11927 uint16_t len, old_len;
11928 struct sctp_stream_reset_response_tsn *resp;
11929 struct sctp_chunkhdr *ch;
11931 ch = mtod(chk->data, struct sctp_chunkhdr *);
11932 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11934 /* get to new offset for the param. */
11935 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11936 /* now how long will this param be? */
11937 len = sizeof(struct sctp_stream_reset_response_tsn);
11938 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11939 resp->ph.param_length = htons(len);
11940 resp->response_seq = htonl(resp_seq);
11941 resp->result = htonl(result);
11942 resp->senders_next_tsn = htonl(send_una);
11943 resp->receivers_next_tsn = htonl(recv_next);
11945 /* now fix the chunk length */
11946 ch->chunk_length = htons(len + old_len);
11947 chk->book_size = len + old_len;
11948 chk->send_size = SCTP_SIZE32(chk->book_size);
11949 chk->book_size_scale = 0;
11950 SCTP_BUF_LEN(chk->data) = chk->send_size;
11955 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11959 uint16_t len, old_len;
11960 struct sctp_chunkhdr *ch;
11961 struct sctp_stream_reset_add_strm *addstr;
11963 ch = mtod(chk->data, struct sctp_chunkhdr *);
11964 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11966 /* get to new offset for the param. */
11967 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11968 /* now how long will this param be? */
11969 len = sizeof(struct sctp_stream_reset_add_strm);
11972 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11973 addstr->ph.param_length = htons(len);
11974 addstr->request_seq = htonl(seq);
11975 addstr->number_of_streams = htons(adding);
11976 addstr->reserved = 0;
11978 /* now fix the chunk length */
11979 ch->chunk_length = htons(len + old_len);
11980 chk->send_size = len + old_len;
11981 chk->book_size = SCTP_SIZE32(chk->send_size);
11982 chk->book_size_scale = 0;
11983 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11988 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11992 uint16_t len, old_len;
11993 struct sctp_chunkhdr *ch;
11994 struct sctp_stream_reset_add_strm *addstr;
11996 ch = mtod(chk->data, struct sctp_chunkhdr *);
11997 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11999 /* get to new offset for the param. */
12000 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12001 /* now how long will this param be? */
12002 len = sizeof(struct sctp_stream_reset_add_strm);
12004 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12005 addstr->ph.param_length = htons(len);
12006 addstr->request_seq = htonl(seq);
12007 addstr->number_of_streams = htons(adding);
12008 addstr->reserved = 0;
12010 /* now fix the chunk length */
12011 ch->chunk_length = htons(len + old_len);
12012 chk->send_size = len + old_len;
12013 chk->book_size = SCTP_SIZE32(chk->send_size);
12014 chk->book_size_scale = 0;
12015 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12020 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12022 struct sctp_association *asoc;
12023 struct sctp_tmit_chunk *chk;
12024 struct sctp_chunkhdr *ch;
12027 asoc = &stcb->asoc;
12028 asoc->trigger_reset = 0;
12029 if (asoc->stream_reset_outstanding) {
12032 sctp_alloc_a_chunk(stcb, chk);
12034 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12037 chk->copy_by_ref = 0;
12038 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12039 chk->rec.chunk_id.can_take_data = 0;
12041 chk->asoc = &stcb->asoc;
12042 chk->book_size = sizeof(struct sctp_chunkhdr);
12043 chk->send_size = SCTP_SIZE32(chk->book_size);
12044 chk->book_size_scale = 0;
12045 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12046 if (chk->data == NULL) {
12047 sctp_free_a_chunk(stcb, chk, so_locked);
12048 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12051 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12053 /* setup chunk parameters */
12054 chk->sent = SCTP_DATAGRAM_UNSENT;
12055 chk->snd_count = 0;
12056 if (stcb->asoc.alternate) {
12057 chk->whoTo = stcb->asoc.alternate;
12059 chk->whoTo = stcb->asoc.primary_destination;
12061 ch = mtod(chk->data, struct sctp_chunkhdr *);
12062 ch->chunk_type = SCTP_STREAM_RESET;
12063 ch->chunk_flags = 0;
12064 ch->chunk_length = htons(chk->book_size);
12065 atomic_add_int(&chk->whoTo->ref_count, 1);
12066 SCTP_BUF_LEN(chk->data) = chk->send_size;
12067 seq = stcb->asoc.str_reset_seq_out;
12068 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12070 asoc->stream_reset_outstanding++;
12072 m_freem(chk->data);
12074 sctp_free_a_chunk(stcb, chk, so_locked);
12077 asoc->str_reset = chk;
12078 /* insert the chunk for sending */
12079 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12082 asoc->ctrl_queue_cnt++;
12084 if (stcb->asoc.send_sack) {
12085 sctp_send_sack(stcb, so_locked);
12087 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12092 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12093 uint16_t number_entries, uint16_t *list,
12094 uint8_t send_in_req,
12095 uint8_t send_tsn_req,
12096 uint8_t add_stream,
12098 uint16_t adding_i, uint8_t peer_asked)
12100 struct sctp_association *asoc;
12101 struct sctp_tmit_chunk *chk;
12102 struct sctp_chunkhdr *ch;
12103 int can_send_out_req = 0;
12106 asoc = &stcb->asoc;
12107 if (asoc->stream_reset_outstanding) {
12109 * Already one pending, must get ACK back to clear the flag.
12111 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12114 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12115 (add_stream == 0)) {
12116 /* nothing to do */
12117 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12120 if (send_tsn_req && send_in_req) {
12121 /* error, can't do that */
12122 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12124 } else if (send_in_req) {
12125 can_send_out_req = 1;
12127 if (number_entries > (MCLBYTES -
12128 SCTP_MIN_OVERHEAD -
12129 sizeof(struct sctp_chunkhdr) -
12130 sizeof(struct sctp_stream_reset_out_request)) /
12131 sizeof(uint16_t)) {
12132 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12135 sctp_alloc_a_chunk(stcb, chk);
12137 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12140 chk->copy_by_ref = 0;
12141 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12142 chk->rec.chunk_id.can_take_data = 0;
12144 chk->asoc = &stcb->asoc;
12145 chk->book_size = sizeof(struct sctp_chunkhdr);
12146 chk->send_size = SCTP_SIZE32(chk->book_size);
12147 chk->book_size_scale = 0;
12149 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12150 if (chk->data == NULL) {
12151 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12152 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12155 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12157 /* setup chunk parameters */
12158 chk->sent = SCTP_DATAGRAM_UNSENT;
12159 chk->snd_count = 0;
12160 if (stcb->asoc.alternate) {
12161 chk->whoTo = stcb->asoc.alternate;
12163 chk->whoTo = stcb->asoc.primary_destination;
12165 atomic_add_int(&chk->whoTo->ref_count, 1);
12166 ch = mtod(chk->data, struct sctp_chunkhdr *);
12167 ch->chunk_type = SCTP_STREAM_RESET;
12168 ch->chunk_flags = 0;
12169 ch->chunk_length = htons(chk->book_size);
12170 SCTP_BUF_LEN(chk->data) = chk->send_size;
12172 seq = stcb->asoc.str_reset_seq_out;
12173 if (can_send_out_req) {
12176 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12179 asoc->stream_reset_outstanding++;
12182 if ((add_stream & 1) &&
12183 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12184 /* Need to allocate more */
12185 struct sctp_stream_out *oldstream;
12186 struct sctp_stream_queue_pending *sp, *nsp;
12188 #if defined(SCTP_DETAILED_STR_STATS)
12192 oldstream = stcb->asoc.strmout;
12193 /* get some more */
12194 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12195 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12197 if (stcb->asoc.strmout == NULL) {
12200 stcb->asoc.strmout = oldstream;
12201 /* Turn off the bit */
12202 x = add_stream & 0xfe;
12207 * Ok now we proceed with copying the old out stuff and
12208 * initializing the new stuff.
12210 SCTP_TCB_SEND_LOCK(stcb);
12211 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12212 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12213 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12214 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12215 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12216 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12217 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12218 stcb->asoc.strmout[i].sid = i;
12219 stcb->asoc.strmout[i].state = oldstream[i].state;
12220 /* FIX ME FIX ME */
12222 * This should be a SS_COPY operation FIX ME STREAM
12225 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12226 /* now anything on those queues? */
12227 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12228 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12229 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12233 /* now the new streams */
12234 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12235 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12236 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12237 stcb->asoc.strmout[i].chunks_on_queues = 0;
12238 #if defined(SCTP_DETAILED_STR_STATS)
12239 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12240 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12241 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12244 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12245 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12247 stcb->asoc.strmout[i].next_mid_ordered = 0;
12248 stcb->asoc.strmout[i].next_mid_unordered = 0;
12249 stcb->asoc.strmout[i].sid = i;
12250 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12251 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12252 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12254 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12255 SCTP_FREE(oldstream, SCTP_M_STRMO);
12256 SCTP_TCB_SEND_UNLOCK(stcb);
12259 if ((add_stream & 1) && (adding_o > 0)) {
12260 asoc->strm_pending_add_size = adding_o;
12261 asoc->peer_req_out = peer_asked;
12262 sctp_add_an_out_stream(chk, seq, adding_o);
12264 asoc->stream_reset_outstanding++;
12266 if ((add_stream & 2) && (adding_i > 0)) {
12267 sctp_add_an_in_stream(chk, seq, adding_i);
12269 asoc->stream_reset_outstanding++;
12272 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12274 asoc->stream_reset_outstanding++;
12276 if (send_tsn_req) {
12277 sctp_add_stream_reset_tsn(chk, seq);
12278 asoc->stream_reset_outstanding++;
12280 asoc->str_reset = chk;
12281 /* insert the chunk for sending */
12282 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12285 asoc->ctrl_queue_cnt++;
12286 if (stcb->asoc.send_sack) {
12287 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12289 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12294 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12295 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12296 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12297 uint32_t vrf_id, uint16_t port)
12299 /* Don't respond to an ABORT with an ABORT. */
12300 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12302 sctp_m_freem(cause);
12305 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12306 mflowtype, mflowid, fibnum,
12312 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12313 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12314 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12315 uint32_t vrf_id, uint16_t port)
12317 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12318 mflowtype, mflowid, fibnum,
12323 static struct mbuf *
12324 sctp_copy_resume(struct uio *uio,
12326 int user_marks_eor,
12329 struct mbuf **new_tail)
12333 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12334 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12336 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12339 *sndout = m_length(m, NULL);
12340 *new_tail = m_last(m);
12346 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12350 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12352 if (sp->data == NULL) {
12353 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12356 sp->tail_mbuf = m_last(sp->data);
12362 static struct sctp_stream_queue_pending *
12363 sctp_copy_it_in(struct sctp_tcb *stcb,
12364 struct sctp_association *asoc,
12365 struct sctp_sndrcvinfo *srcv,
12367 struct sctp_nets *net,
12369 int user_marks_eor,
12373 * This routine must be very careful in its work. Protocol
12374 * processing is up and running so care must be taken to spl...()
12375 * when you need to do something that may effect the stcb/asoc. The
12376 * sb is locked however. When data is copied the protocol processing
12377 * should be enabled since this is a slower operation...
12379 struct sctp_stream_queue_pending *sp = NULL;
12383 /* Now can we send this? */
12384 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12385 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12386 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12387 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12388 /* got data while shutting down */
12389 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12390 *error = ECONNRESET;
12393 sctp_alloc_a_strmoq(stcb, sp);
12395 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12400 sp->sender_all_done = 0;
12401 sp->sinfo_flags = srcv->sinfo_flags;
12402 sp->timetolive = srcv->sinfo_timetolive;
12403 sp->ppid = srcv->sinfo_ppid;
12404 sp->context = srcv->sinfo_context;
12406 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12408 sp->sid = srcv->sinfo_stream;
12409 sp->length = (uint32_t)min(uio->uio_resid, max_send_len);
12410 if ((sp->length == (uint32_t)uio->uio_resid) &&
12411 ((user_marks_eor == 0) ||
12412 (srcv->sinfo_flags & SCTP_EOF) ||
12413 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12414 sp->msg_is_complete = 1;
12416 sp->msg_is_complete = 0;
12418 sp->sender_all_done = 0;
12419 sp->some_taken = 0;
12420 sp->put_last_out = 0;
12421 resv_in_first = SCTP_DATA_CHUNK_OVERHEAD(stcb);
12422 sp->data = sp->tail_mbuf = NULL;
12423 if (sp->length == 0) {
12427 if (srcv->sinfo_keynumber_valid) {
12428 sp->auth_keyid = srcv->sinfo_keynumber;
12430 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12432 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12433 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12434 sp->holds_key_ref = 1;
12436 *error = sctp_copy_one(sp, uio, resv_in_first);
12439 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12442 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12444 atomic_add_int(&sp->net->ref_count, 1);
12448 sctp_set_prsctp_policy(sp);
12456 sctp_sosend(struct socket *so,
12457 struct sockaddr *addr,
12460 struct mbuf *control,
12465 int error, use_sndinfo = 0;
12466 struct sctp_sndrcvinfo sndrcvninfo;
12467 struct sockaddr *addr_to_use;
12468 #if defined(INET) && defined(INET6)
12469 struct sockaddr_in sin;
12473 /* process cmsg snd/rcv info (maybe a assoc-id) */
12474 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12475 sizeof(sndrcvninfo))) {
12480 addr_to_use = addr;
12481 #if defined(INET) && defined(INET6)
12482 if ((addr) && (addr->sa_family == AF_INET6)) {
12483 struct sockaddr_in6 *sin6;
12485 sin6 = (struct sockaddr_in6 *)addr;
12486 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12487 in6_sin6_2_sin(&sin, sin6);
12488 addr_to_use = (struct sockaddr *)&sin;
12492 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12495 use_sndinfo ? &sndrcvninfo : NULL
12503 sctp_lower_sosend(struct socket *so,
12504 struct sockaddr *addr,
12506 struct mbuf *i_pak,
12507 struct mbuf *control,
12509 struct sctp_sndrcvinfo *srcv
12514 unsigned int sndlen = 0, max_len;
12516 struct mbuf *top = NULL;
12517 int queue_only = 0, queue_only_for_init = 0;
12518 int free_cnt_applied = 0;
12520 int now_filled = 0;
12521 unsigned int inqueue_bytes = 0;
12522 struct sctp_block_entry be;
12523 struct sctp_inpcb *inp;
12524 struct sctp_tcb *stcb = NULL;
12525 struct timeval now;
12526 struct sctp_nets *net;
12527 struct sctp_association *asoc;
12528 struct sctp_inpcb *t_inp;
12529 int user_marks_eor;
12530 int create_lock_applied = 0;
12531 int nagle_applies = 0;
12532 int some_on_control = 0;
12533 int got_all_of_the_send = 0;
12534 int hold_tcblock = 0;
12535 int non_blocking = 0;
12536 uint32_t local_add_more, local_soresv = 0;
12538 uint16_t sinfo_flags;
12539 sctp_assoc_t sinfo_assoc_id;
12546 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12548 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12551 SCTP_RELEASE_PKT(i_pak);
12555 if ((uio == NULL) && (i_pak == NULL)) {
12556 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12559 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12560 atomic_add_int(&inp->total_sends, 1);
12562 if (uio->uio_resid < 0) {
12563 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12566 sndlen = (unsigned int)uio->uio_resid;
12568 top = SCTP_HEADER_TO_CHAIN(i_pak);
12569 sndlen = SCTP_HEADER_LEN(i_pak);
12571 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12574 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12575 SCTP_IS_LISTENING(inp)) {
12576 /* The listener can NOT send */
12577 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12582 * Pre-screen address, if one is given the sin-len
12583 * must be set correctly!
12586 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12588 switch (raddr->sa.sa_family) {
12591 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12592 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12596 port = raddr->sin.sin_port;
12601 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12602 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12606 port = raddr->sin6.sin6_port;
12610 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12611 error = EAFNOSUPPORT;
12618 sinfo_flags = srcv->sinfo_flags;
12619 sinfo_assoc_id = srcv->sinfo_assoc_id;
12620 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12621 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12622 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12626 if (srcv->sinfo_flags)
12627 SCTP_STAT_INCR(sctps_sends_with_flags);
12629 sinfo_flags = inp->def_send.sinfo_flags;
12630 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12632 if (sinfo_flags & SCTP_SENDALL) {
12633 /* its a sendall */
12634 error = sctp_sendall(inp, uio, top, srcv);
12638 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12639 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12643 /* now we must find the assoc */
12644 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12645 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12646 SCTP_INP_RLOCK(inp);
12647 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12649 SCTP_TCB_LOCK(stcb);
12652 SCTP_INP_RUNLOCK(inp);
12653 } else if (sinfo_assoc_id) {
12654 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 1);
12655 if (stcb != NULL) {
12660 * Since we did not use findep we must
12661 * increment it, and if we don't find a tcb
12664 SCTP_INP_WLOCK(inp);
12665 SCTP_INP_INCR_REF(inp);
12666 SCTP_INP_WUNLOCK(inp);
12667 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12668 if (stcb == NULL) {
12669 SCTP_INP_WLOCK(inp);
12670 SCTP_INP_DECR_REF(inp);
12671 SCTP_INP_WUNLOCK(inp);
12676 if ((stcb == NULL) && (addr)) {
12677 /* Possible implicit send? */
12678 SCTP_ASOC_CREATE_LOCK(inp);
12679 create_lock_applied = 1;
12680 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12681 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12682 /* Should I really unlock ? */
12683 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12688 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12689 (addr->sa_family == AF_INET6)) {
12690 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12694 SCTP_INP_WLOCK(inp);
12695 SCTP_INP_INCR_REF(inp);
12696 SCTP_INP_WUNLOCK(inp);
12697 /* With the lock applied look again */
12698 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12699 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12700 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12702 if (stcb == NULL) {
12703 SCTP_INP_WLOCK(inp);
12704 SCTP_INP_DECR_REF(inp);
12705 SCTP_INP_WUNLOCK(inp);
12712 if (t_inp != inp) {
12713 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12718 if (stcb == NULL) {
12719 if (addr == NULL) {
12720 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12724 /* We must go ahead and start the INIT process */
12727 if ((sinfo_flags & SCTP_ABORT) ||
12728 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12730 * User asks to abort a non-existant assoc,
12731 * or EOF a non-existant assoc with no data
12733 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12737 /* get an asoc/stcb struct */
12738 vrf_id = inp->def_vrf_id;
12740 if (create_lock_applied == 0) {
12741 panic("Error, should hold create lock and I don't?");
12744 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12745 inp->sctp_ep.pre_open_stream_count,
12748 if (stcb == NULL) {
12749 /* Error is setup for us in the call */
12752 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12753 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12755 * Set the connected flag so we can queue
12758 soisconnecting(so);
12761 if (create_lock_applied) {
12762 SCTP_ASOC_CREATE_UNLOCK(inp);
12763 create_lock_applied = 0;
12765 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12768 * Turn on queue only flag to prevent data from
12772 asoc = &stcb->asoc;
12773 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12774 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12776 /* initialize authentication params for the assoc */
12777 sctp_initialize_auth_params(inp, stcb);
12780 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12781 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12782 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12788 /* out with the INIT */
12789 queue_only_for_init = 1;
12791 * we may want to dig in after this call and adjust the MTU
12792 * value. It defaulted to 1500 (constant) but the ro
12793 * structure may now have an update and thus we may need to
12794 * change it BEFORE we append the message.
12798 asoc = &stcb->asoc;
12800 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12801 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12803 net = sctp_findnet(stcb, addr);
12806 if ((net == NULL) ||
12807 ((port != 0) && (port != stcb->rport))) {
12808 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12813 if (stcb->asoc.alternate) {
12814 net = stcb->asoc.alternate;
12816 net = stcb->asoc.primary_destination;
12819 atomic_add_int(&stcb->total_sends, 1);
12820 /* Keep the stcb from being freed under our feet */
12821 atomic_add_int(&asoc->refcnt, 1);
12822 free_cnt_applied = 1;
12824 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12825 if (sndlen > asoc->smallest_mtu) {
12826 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12831 if (SCTP_SO_IS_NBIO(so)
12832 || (flags & MSG_NBIO)
12836 /* would we block? */
12837 if (non_blocking) {
12840 if (hold_tcblock == 0) {
12841 SCTP_TCB_LOCK(stcb);
12844 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
12845 if (user_marks_eor == 0) {
12850 if ((SCTP_SB_LIMIT_SND(so) < (amount + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12851 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12852 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12853 if (sndlen > SCTP_SB_LIMIT_SND(so))
12856 error = EWOULDBLOCK;
12859 stcb->asoc.sb_send_resv += sndlen;
12860 SCTP_TCB_UNLOCK(stcb);
12863 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12865 local_soresv = sndlen;
12866 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12867 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12868 error = ECONNRESET;
12871 if (create_lock_applied) {
12872 SCTP_ASOC_CREATE_UNLOCK(inp);
12873 create_lock_applied = 0;
12875 /* Is the stream no. valid? */
12876 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12877 /* Invalid stream number */
12878 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12882 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12883 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12885 * Can't queue any data while stream reset is underway.
12887 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12892 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12895 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12896 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12899 /* we are now done with all control */
12901 sctp_m_freem(control);
12904 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12905 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12906 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12907 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12908 if (srcv->sinfo_flags & SCTP_ABORT) {
12911 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12912 error = ECONNRESET;
12916 /* Ok, we will attempt a msgsnd :> */
12918 p->td_ru.ru_msgsnd++;
12920 /* Are we aborting? */
12921 if (srcv->sinfo_flags & SCTP_ABORT) {
12923 int tot_demand, tot_out = 0, max_out;
12925 SCTP_STAT_INCR(sctps_sends_with_abort);
12926 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12927 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12928 /* It has to be up before we abort */
12929 /* how big is the user initiated abort? */
12930 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12934 if (hold_tcblock) {
12935 SCTP_TCB_UNLOCK(stcb);
12939 struct mbuf *cntm = NULL;
12941 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12943 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12944 tot_out += SCTP_BUF_LEN(cntm);
12948 /* Must fit in a MTU */
12950 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12951 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12953 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12957 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12960 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12964 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12965 max_out -= sizeof(struct sctp_abort_msg);
12966 if (tot_out > max_out) {
12970 struct sctp_paramhdr *ph;
12972 /* now move forward the data pointer */
12973 ph = mtod(mm, struct sctp_paramhdr *);
12974 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12975 ph->param_length = htons((uint16_t)(sizeof(struct sctp_paramhdr) + tot_out));
12977 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12979 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12982 * Here if we can't get his data we
12983 * still abort we just don't get to
12984 * send the users note :-0
12991 SCTP_BUF_NEXT(mm) = top;
12995 if (hold_tcblock == 0) {
12996 SCTP_TCB_LOCK(stcb);
12998 atomic_add_int(&stcb->asoc.refcnt, -1);
12999 free_cnt_applied = 0;
13000 /* release this lock, otherwise we hang on ourselves */
13001 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13002 /* now relock the stcb so everything is sane */
13006 * In this case top is already chained to mm avoid double
13007 * free, since we free it below if top != NULL and driver
13008 * would free it after sending the packet out
13015 /* Calculate the maximum we can send */
13016 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13017 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13018 if (non_blocking) {
13019 /* we already checked for non-blocking above. */
13022 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13027 if (hold_tcblock) {
13028 SCTP_TCB_UNLOCK(stcb);
13031 if (asoc->strmout == NULL) {
13032 /* huh? software error */
13033 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13037 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13038 if ((user_marks_eor == 0) &&
13039 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13040 /* It will NEVER fit */
13041 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13045 if ((uio == NULL) && user_marks_eor) {
13047 * We do not support eeor mode for
13048 * sending with mbuf chains (like sendfile).
13050 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13054 if (user_marks_eor) {
13055 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13058 * For non-eeor the whole message must fit in
13059 * the socket send buffer.
13061 local_add_more = sndlen;
13064 if (non_blocking) {
13065 goto skip_preblock;
13067 if (((max_len <= local_add_more) &&
13068 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13070 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13071 /* No room right now ! */
13072 SOCKBUF_LOCK(&so->so_snd);
13073 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13074 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13075 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13077 (unsigned int)SCTP_SB_LIMIT_SND(so),
13080 stcb->asoc.stream_queue_cnt,
13081 stcb->asoc.chunks_on_out_queue,
13082 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13083 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13084 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13087 stcb->block_entry = &be;
13088 error = sbwait(&so->so_snd);
13089 stcb->block_entry = NULL;
13090 if (error || so->so_error || be.error) {
13093 error = so->so_error;
13098 SOCKBUF_UNLOCK(&so->so_snd);
13101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13102 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13103 asoc, stcb->asoc.total_output_queue_size);
13105 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13106 SOCKBUF_UNLOCK(&so->so_snd);
13109 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13111 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13112 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13116 SOCKBUF_UNLOCK(&so->so_snd);
13119 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13123 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13124 * case NOTE: uio will be null when top/mbuf is passed
13127 if (srcv->sinfo_flags & SCTP_EOF) {
13128 got_all_of_the_send = 1;
13131 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13137 struct sctp_stream_queue_pending *sp;
13138 struct sctp_stream_out *strm;
13141 SCTP_TCB_SEND_LOCK(stcb);
13142 if ((asoc->stream_locked) &&
13143 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13144 SCTP_TCB_SEND_UNLOCK(stcb);
13145 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13149 SCTP_TCB_SEND_UNLOCK(stcb);
13151 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13152 if (strm->last_msg_incomplete == 0) {
13154 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13155 if ((sp == NULL) || (error)) {
13158 SCTP_TCB_SEND_LOCK(stcb);
13159 if (sp->msg_is_complete) {
13160 strm->last_msg_incomplete = 0;
13161 asoc->stream_locked = 0;
13164 * Just got locked to this guy in case of an
13167 strm->last_msg_incomplete = 1;
13168 if (stcb->asoc.idata_supported == 0) {
13169 asoc->stream_locked = 1;
13170 asoc->stream_locked_on = srcv->sinfo_stream;
13172 sp->sender_all_done = 0;
13174 sctp_snd_sb_alloc(stcb, sp->length);
13175 atomic_add_int(&asoc->stream_queue_cnt, 1);
13176 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13177 SCTP_STAT_INCR(sctps_sends_with_unord);
13179 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13180 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13181 SCTP_TCB_SEND_UNLOCK(stcb);
13183 SCTP_TCB_SEND_LOCK(stcb);
13184 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13185 SCTP_TCB_SEND_UNLOCK(stcb);
13187 /* ???? Huh ??? last msg is gone */
13189 panic("Warning: Last msg marked incomplete, yet nothing left?");
13191 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13192 strm->last_msg_incomplete = 0;
13198 while (uio->uio_resid > 0) {
13199 /* How much room do we have? */
13200 struct mbuf *new_tail, *mm;
13202 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13203 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13204 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13208 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13209 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13210 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13213 if (hold_tcblock) {
13214 SCTP_TCB_UNLOCK(stcb);
13217 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13218 if ((mm == NULL) || error) {
13224 /* Update the mbuf and count */
13225 SCTP_TCB_SEND_LOCK(stcb);
13226 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13228 * we need to get out. Peer probably
13232 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13233 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13234 error = ECONNRESET;
13236 SCTP_TCB_SEND_UNLOCK(stcb);
13239 if (sp->tail_mbuf) {
13240 /* tack it to the end */
13241 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13242 sp->tail_mbuf = new_tail;
13244 /* A stolen mbuf */
13246 sp->tail_mbuf = new_tail;
13248 sctp_snd_sb_alloc(stcb, sndout);
13249 atomic_add_int(&sp->length, sndout);
13251 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13252 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13254 /* Did we reach EOR? */
13255 if ((uio->uio_resid == 0) &&
13256 ((user_marks_eor == 0) ||
13257 (srcv->sinfo_flags & SCTP_EOF) ||
13258 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13259 sp->msg_is_complete = 1;
13261 sp->msg_is_complete = 0;
13263 SCTP_TCB_SEND_UNLOCK(stcb);
13265 if (uio->uio_resid == 0) {
13270 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13272 * This is ugly but we must assure locking
13275 if (hold_tcblock == 0) {
13276 SCTP_TCB_LOCK(stcb);
13279 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13280 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13281 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes)
13282 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13288 SCTP_TCB_UNLOCK(stcb);
13291 /* wait for space now */
13292 if (non_blocking) {
13293 /* Non-blocking io in place out */
13296 /* What about the INIT, send it maybe */
13297 if (queue_only_for_init) {
13298 if (hold_tcblock == 0) {
13299 SCTP_TCB_LOCK(stcb);
13302 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13303 /* a collision took us forward? */
13306 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13307 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13311 if ((net->flight_size > net->cwnd) &&
13312 (asoc->sctp_cmt_on_off == 0)) {
13313 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13315 } else if (asoc->ifp_had_enobuf) {
13316 SCTP_STAT_INCR(sctps_ifnomemqueued);
13317 if (net->flight_size > (2 * net->mtu)) {
13320 asoc->ifp_had_enobuf = 0;
13322 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13323 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13324 (stcb->asoc.total_flight > 0) &&
13325 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13326 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13329 * Ok, Nagle is set on and we have data outstanding.
13330 * Don't send anything and let SACKs drive out the
13331 * data unless we have a "full" segment to send.
13333 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13334 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13336 SCTP_STAT_INCR(sctps_naglequeued);
13339 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13340 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13341 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13343 SCTP_STAT_INCR(sctps_naglesent);
13346 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13348 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13349 nagle_applies, un_sent);
13350 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13351 stcb->asoc.total_flight,
13352 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13354 if (queue_only_for_init)
13355 queue_only_for_init = 0;
13356 if ((queue_only == 0) && (nagle_applies == 0)) {
13358 * need to start chunk output
13359 * before blocking.. note that if
13360 * a lock is already applied, then
13361 * the input via the net is happening
13362 * and I don't need to start output :-D
13364 if (hold_tcblock == 0) {
13365 if (SCTP_TCB_TRYLOCK(stcb)) {
13367 sctp_chunk_output(inp,
13369 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13372 sctp_chunk_output(inp,
13374 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13376 if (hold_tcblock == 1) {
13377 SCTP_TCB_UNLOCK(stcb);
13381 SOCKBUF_LOCK(&so->so_snd);
13383 * This is a bit strange, but I think it will
13384 * work. The total_output_queue_size is locked and
13385 * protected by the TCB_LOCK, which we just released.
13386 * There is a race that can occur between releasing it
13387 * above, and me getting the socket lock, where sacks
13388 * come in but we have not put the SB_WAIT on the
13389 * so_snd buffer to get the wakeup. After the LOCK
13390 * is applied the sack_processing will also need to
13391 * LOCK the so->so_snd to do the actual sowwakeup(). So
13392 * once we have the socket buffer lock if we recheck the
13393 * size we KNOW we will get to sleep safely with the
13394 * wakeup flag in place.
13396 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * SCTP_DATA_CHUNK_OVERHEAD(stcb));
13397 if (SCTP_SB_LIMIT_SND(so) <= (inqueue_bytes +
13398 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13399 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13400 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13401 asoc, (size_t)uio->uio_resid);
13404 stcb->block_entry = &be;
13405 error = sbwait(&so->so_snd);
13406 stcb->block_entry = NULL;
13408 if (error || so->so_error || be.error) {
13411 error = so->so_error;
13416 SOCKBUF_UNLOCK(&so->so_snd);
13419 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13420 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13421 asoc, stcb->asoc.total_output_queue_size);
13424 SOCKBUF_UNLOCK(&so->so_snd);
13425 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13429 SCTP_TCB_SEND_LOCK(stcb);
13430 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13431 SCTP_TCB_SEND_UNLOCK(stcb);
13435 if (sp->msg_is_complete == 0) {
13436 strm->last_msg_incomplete = 1;
13437 if (stcb->asoc.idata_supported == 0) {
13438 asoc->stream_locked = 1;
13439 asoc->stream_locked_on = srcv->sinfo_stream;
13442 sp->sender_all_done = 1;
13443 strm->last_msg_incomplete = 0;
13444 asoc->stream_locked = 0;
13447 SCTP_PRINTF("Huh no sp TSNH?\n");
13448 strm->last_msg_incomplete = 0;
13449 asoc->stream_locked = 0;
13451 SCTP_TCB_SEND_UNLOCK(stcb);
13452 if (uio->uio_resid == 0) {
13453 got_all_of_the_send = 1;
13456 /* We send in a 0, since we do NOT have any locks */
13457 error = sctp_msg_append(stcb, net, top, srcv, 0);
13459 if (srcv->sinfo_flags & SCTP_EOF) {
13461 * This should only happen for Panda for the mbuf
13462 * send case, which does NOT yet support EEOR mode.
13463 * Thus, we can just set this flag to do the proper
13466 got_all_of_the_send = 1;
13474 if ((srcv->sinfo_flags & SCTP_EOF) &&
13475 (got_all_of_the_send == 1)) {
13476 SCTP_STAT_INCR(sctps_sends_with_eof);
13478 if (hold_tcblock == 0) {
13479 SCTP_TCB_LOCK(stcb);
13482 if (TAILQ_EMPTY(&asoc->send_queue) &&
13483 TAILQ_EMPTY(&asoc->sent_queue) &&
13484 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13485 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13488 /* there is nothing queued to send, so I'm done... */
13489 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13490 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13491 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13492 struct sctp_nets *netp;
13494 /* only send SHUTDOWN the first time through */
13495 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13496 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13498 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13499 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13500 sctp_stop_timers_for_shutdown(stcb);
13501 if (stcb->asoc.alternate) {
13502 netp = stcb->asoc.alternate;
13504 netp = stcb->asoc.primary_destination;
13506 sctp_send_shutdown(stcb, netp);
13507 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13509 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13510 asoc->primary_destination);
13514 * we still got (or just got) data to send, so set
13518 * XXX sockets draft says that SCTP_EOF should be
13519 * sent with no data. currently, we will allow user
13520 * data to be sent first and move to
13523 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13524 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13525 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13526 if (hold_tcblock == 0) {
13527 SCTP_TCB_LOCK(stcb);
13530 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13531 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13533 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13534 if (TAILQ_EMPTY(&asoc->send_queue) &&
13535 TAILQ_EMPTY(&asoc->sent_queue) &&
13536 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13537 struct mbuf *op_err;
13538 char msg[SCTP_DIAG_INFO_LEN];
13541 if (free_cnt_applied) {
13542 atomic_add_int(&stcb->asoc.refcnt, -1);
13543 free_cnt_applied = 0;
13545 snprintf(msg, sizeof(msg),
13546 "%s:%d at %s", __FILE__, __LINE__, __func__);
13547 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13549 sctp_abort_an_association(stcb->sctp_ep, stcb,
13550 op_err, SCTP_SO_LOCKED);
13552 * now relock the stcb so everything
13559 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13560 asoc->primary_destination);
13561 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13566 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13567 some_on_control = 1;
13569 if (queue_only_for_init) {
13570 if (hold_tcblock == 0) {
13571 SCTP_TCB_LOCK(stcb);
13574 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13575 /* a collision took us forward? */
13578 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13579 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13583 if ((net->flight_size > net->cwnd) &&
13584 (stcb->asoc.sctp_cmt_on_off == 0)) {
13585 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13587 } else if (asoc->ifp_had_enobuf) {
13588 SCTP_STAT_INCR(sctps_ifnomemqueued);
13589 if (net->flight_size > (2 * net->mtu)) {
13592 asoc->ifp_had_enobuf = 0;
13594 un_sent = stcb->asoc.total_output_queue_size - stcb->asoc.total_flight;
13595 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13596 (stcb->asoc.total_flight > 0) &&
13597 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13598 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13600 * Ok, Nagle is set on and we have data outstanding.
13601 * Don't send anything and let SACKs drive out the
13602 * data unless wen have a "full" segment to send.
13604 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13605 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13607 SCTP_STAT_INCR(sctps_naglequeued);
13610 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13611 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13612 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13614 SCTP_STAT_INCR(sctps_naglesent);
13617 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13618 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13619 nagle_applies, un_sent);
13620 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13621 stcb->asoc.total_flight,
13622 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13624 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13625 /* we can attempt to send too. */
13626 if (hold_tcblock == 0) {
13628 * If there is activity recv'ing sacks no need to
13631 if (SCTP_TCB_TRYLOCK(stcb)) {
13632 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13636 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13638 } else if ((queue_only == 0) &&
13639 (stcb->asoc.peers_rwnd == 0) &&
13640 (stcb->asoc.total_flight == 0)) {
13641 /* We get to have a probe outstanding */
13642 if (hold_tcblock == 0) {
13644 SCTP_TCB_LOCK(stcb);
13646 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13647 } else if (some_on_control) {
13648 int num_out, reason, frag_point;
13650 /* Here we do control only */
13651 if (hold_tcblock == 0) {
13653 SCTP_TCB_LOCK(stcb);
13655 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13656 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13657 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13659 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13660 queue_only, stcb->asoc.peers_rwnd, un_sent,
13661 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13662 stcb->asoc.total_output_queue_size, error);
13667 if (local_soresv && stcb) {
13668 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13670 if (create_lock_applied) {
13671 SCTP_ASOC_CREATE_UNLOCK(inp);
13673 if ((stcb) && hold_tcblock) {
13674 SCTP_TCB_UNLOCK(stcb);
13676 if (stcb && free_cnt_applied) {
13677 atomic_add_int(&stcb->asoc.refcnt, -1);
13681 if (mtx_owned(&stcb->tcb_mtx)) {
13682 panic("Leaving with tcb mtx owned?");
13684 if (mtx_owned(&stcb->tcb_send_mtx)) {
13685 panic("Leaving with tcb send mtx owned?");
13693 sctp_m_freem(control);
13700 * generate an AUTHentication chunk, if required
13703 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13704 struct sctp_auth_chunk **auth_ret, uint32_t *offset,
13705 struct sctp_tcb *stcb, uint8_t chunk)
13707 struct mbuf *m_auth;
13708 struct sctp_auth_chunk *auth;
13712 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13716 if (stcb->asoc.auth_supported == 0) {
13719 /* does the requested chunk require auth? */
13720 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13723 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13724 if (m_auth == NULL) {
13728 /* reserve some space if this will be the first mbuf */
13730 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13731 /* fill in the AUTH chunk details */
13732 auth = mtod(m_auth, struct sctp_auth_chunk *);
13733 memset(auth, 0, sizeof(*auth));
13734 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13735 auth->ch.chunk_flags = 0;
13736 chunk_len = sizeof(*auth) +
13737 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13738 auth->ch.chunk_length = htons(chunk_len);
13739 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13740 /* key id and hmac digest will be computed and filled in upon send */
13742 /* save the offset where the auth was inserted into the chain */
13744 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13745 *offset += SCTP_BUF_LEN(cn);
13748 /* update length and return pointer to the auth chunk */
13749 SCTP_BUF_LEN(m_auth) = chunk_len;
13750 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13751 if (auth_ret != NULL)
13759 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t *ro)
13761 struct nd_prefix *pfx = NULL;
13762 struct nd_pfxrouter *pfxrtr = NULL;
13763 struct sockaddr_in6 gw6;
13765 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13768 /* get prefix entry of address */
13770 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13771 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13773 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13774 &src6->sin6_addr, &pfx->ndpr_mask))
13777 /* no prefix entry in the prefix list */
13780 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13781 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13784 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13785 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13787 /* search installed gateway from prefix entry */
13788 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13789 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13790 gw6.sin6_family = AF_INET6;
13791 gw6.sin6_len = sizeof(struct sockaddr_in6);
13792 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13793 sizeof(struct in6_addr));
13794 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13795 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13796 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13797 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13798 if (sctp_cmpaddr((struct sockaddr *)&gw6, ro->ro_rt->rt_gateway)) {
13800 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13805 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13811 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t *ro)
13814 struct sockaddr_in *sin, *mask;
13815 struct ifaddr *ifa;
13816 struct in_addr srcnetaddr, gwnetaddr;
13818 if (ro == NULL || ro->ro_rt == NULL ||
13819 sifa->address.sa.sa_family != AF_INET) {
13822 ifa = (struct ifaddr *)sifa->ifa;
13823 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13824 sin = &sifa->address.sin;
13825 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13826 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13827 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13828 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13830 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13831 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13832 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13833 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13834 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13835 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {