2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
56 #include <netinet/udp_var.h>
57 #include <machine/in_cksum.h>
61 #define SCTP_MAX_GAPS_INARRAY 4
63 uint8_t right_edge; /* mergable on the right edge */
64 uint8_t left_edge; /* mergable on the left edge */
67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
70 const struct sack_track sack_array[256] = {
71 {0, 0, 0, 0, /* 0x00 */
78 {1, 0, 1, 0, /* 0x01 */
85 {0, 0, 1, 0, /* 0x02 */
92 {1, 0, 1, 0, /* 0x03 */
99 {0, 0, 1, 0, /* 0x04 */
106 {1, 0, 2, 0, /* 0x05 */
113 {0, 0, 1, 0, /* 0x06 */
120 {1, 0, 1, 0, /* 0x07 */
127 {0, 0, 1, 0, /* 0x08 */
134 {1, 0, 2, 0, /* 0x09 */
141 {0, 0, 2, 0, /* 0x0a */
148 {1, 0, 2, 0, /* 0x0b */
155 {0, 0, 1, 0, /* 0x0c */
162 {1, 0, 2, 0, /* 0x0d */
169 {0, 0, 1, 0, /* 0x0e */
176 {1, 0, 1, 0, /* 0x0f */
183 {0, 0, 1, 0, /* 0x10 */
190 {1, 0, 2, 0, /* 0x11 */
197 {0, 0, 2, 0, /* 0x12 */
204 {1, 0, 2, 0, /* 0x13 */
211 {0, 0, 2, 0, /* 0x14 */
218 {1, 0, 3, 0, /* 0x15 */
225 {0, 0, 2, 0, /* 0x16 */
232 {1, 0, 2, 0, /* 0x17 */
239 {0, 0, 1, 0, /* 0x18 */
246 {1, 0, 2, 0, /* 0x19 */
253 {0, 0, 2, 0, /* 0x1a */
260 {1, 0, 2, 0, /* 0x1b */
267 {0, 0, 1, 0, /* 0x1c */
274 {1, 0, 2, 0, /* 0x1d */
281 {0, 0, 1, 0, /* 0x1e */
288 {1, 0, 1, 0, /* 0x1f */
295 {0, 0, 1, 0, /* 0x20 */
302 {1, 0, 2, 0, /* 0x21 */
309 {0, 0, 2, 0, /* 0x22 */
316 {1, 0, 2, 0, /* 0x23 */
323 {0, 0, 2, 0, /* 0x24 */
330 {1, 0, 3, 0, /* 0x25 */
337 {0, 0, 2, 0, /* 0x26 */
344 {1, 0, 2, 0, /* 0x27 */
351 {0, 0, 2, 0, /* 0x28 */
358 {1, 0, 3, 0, /* 0x29 */
365 {0, 0, 3, 0, /* 0x2a */
372 {1, 0, 3, 0, /* 0x2b */
379 {0, 0, 2, 0, /* 0x2c */
386 {1, 0, 3, 0, /* 0x2d */
393 {0, 0, 2, 0, /* 0x2e */
400 {1, 0, 2, 0, /* 0x2f */
407 {0, 0, 1, 0, /* 0x30 */
414 {1, 0, 2, 0, /* 0x31 */
421 {0, 0, 2, 0, /* 0x32 */
428 {1, 0, 2, 0, /* 0x33 */
435 {0, 0, 2, 0, /* 0x34 */
442 {1, 0, 3, 0, /* 0x35 */
449 {0, 0, 2, 0, /* 0x36 */
456 {1, 0, 2, 0, /* 0x37 */
463 {0, 0, 1, 0, /* 0x38 */
470 {1, 0, 2, 0, /* 0x39 */
477 {0, 0, 2, 0, /* 0x3a */
484 {1, 0, 2, 0, /* 0x3b */
491 {0, 0, 1, 0, /* 0x3c */
498 {1, 0, 2, 0, /* 0x3d */
505 {0, 0, 1, 0, /* 0x3e */
512 {1, 0, 1, 0, /* 0x3f */
519 {0, 0, 1, 0, /* 0x40 */
526 {1, 0, 2, 0, /* 0x41 */
533 {0, 0, 2, 0, /* 0x42 */
540 {1, 0, 2, 0, /* 0x43 */
547 {0, 0, 2, 0, /* 0x44 */
554 {1, 0, 3, 0, /* 0x45 */
561 {0, 0, 2, 0, /* 0x46 */
568 {1, 0, 2, 0, /* 0x47 */
575 {0, 0, 2, 0, /* 0x48 */
582 {1, 0, 3, 0, /* 0x49 */
589 {0, 0, 3, 0, /* 0x4a */
596 {1, 0, 3, 0, /* 0x4b */
603 {0, 0, 2, 0, /* 0x4c */
610 {1, 0, 3, 0, /* 0x4d */
617 {0, 0, 2, 0, /* 0x4e */
624 {1, 0, 2, 0, /* 0x4f */
631 {0, 0, 2, 0, /* 0x50 */
638 {1, 0, 3, 0, /* 0x51 */
645 {0, 0, 3, 0, /* 0x52 */
652 {1, 0, 3, 0, /* 0x53 */
659 {0, 0, 3, 0, /* 0x54 */
666 {1, 0, 4, 0, /* 0x55 */
673 {0, 0, 3, 0, /* 0x56 */
680 {1, 0, 3, 0, /* 0x57 */
687 {0, 0, 2, 0, /* 0x58 */
694 {1, 0, 3, 0, /* 0x59 */
701 {0, 0, 3, 0, /* 0x5a */
708 {1, 0, 3, 0, /* 0x5b */
715 {0, 0, 2, 0, /* 0x5c */
722 {1, 0, 3, 0, /* 0x5d */
729 {0, 0, 2, 0, /* 0x5e */
736 {1, 0, 2, 0, /* 0x5f */
743 {0, 0, 1, 0, /* 0x60 */
750 {1, 0, 2, 0, /* 0x61 */
757 {0, 0, 2, 0, /* 0x62 */
764 {1, 0, 2, 0, /* 0x63 */
771 {0, 0, 2, 0, /* 0x64 */
778 {1, 0, 3, 0, /* 0x65 */
785 {0, 0, 2, 0, /* 0x66 */
792 {1, 0, 2, 0, /* 0x67 */
799 {0, 0, 2, 0, /* 0x68 */
806 {1, 0, 3, 0, /* 0x69 */
813 {0, 0, 3, 0, /* 0x6a */
820 {1, 0, 3, 0, /* 0x6b */
827 {0, 0, 2, 0, /* 0x6c */
834 {1, 0, 3, 0, /* 0x6d */
841 {0, 0, 2, 0, /* 0x6e */
848 {1, 0, 2, 0, /* 0x6f */
855 {0, 0, 1, 0, /* 0x70 */
862 {1, 0, 2, 0, /* 0x71 */
869 {0, 0, 2, 0, /* 0x72 */
876 {1, 0, 2, 0, /* 0x73 */
883 {0, 0, 2, 0, /* 0x74 */
890 {1, 0, 3, 0, /* 0x75 */
897 {0, 0, 2, 0, /* 0x76 */
904 {1, 0, 2, 0, /* 0x77 */
911 {0, 0, 1, 0, /* 0x78 */
918 {1, 0, 2, 0, /* 0x79 */
925 {0, 0, 2, 0, /* 0x7a */
932 {1, 0, 2, 0, /* 0x7b */
939 {0, 0, 1, 0, /* 0x7c */
946 {1, 0, 2, 0, /* 0x7d */
953 {0, 0, 1, 0, /* 0x7e */
960 {1, 0, 1, 0, /* 0x7f */
967 {0, 1, 1, 0, /* 0x80 */
974 {1, 1, 2, 0, /* 0x81 */
981 {0, 1, 2, 0, /* 0x82 */
988 {1, 1, 2, 0, /* 0x83 */
995 {0, 1, 2, 0, /* 0x84 */
1002 {1, 1, 3, 0, /* 0x85 */
1009 {0, 1, 2, 0, /* 0x86 */
1016 {1, 1, 2, 0, /* 0x87 */
1023 {0, 1, 2, 0, /* 0x88 */
1030 {1, 1, 3, 0, /* 0x89 */
1037 {0, 1, 3, 0, /* 0x8a */
1044 {1, 1, 3, 0, /* 0x8b */
1051 {0, 1, 2, 0, /* 0x8c */
1058 {1, 1, 3, 0, /* 0x8d */
1065 {0, 1, 2, 0, /* 0x8e */
1072 {1, 1, 2, 0, /* 0x8f */
1079 {0, 1, 2, 0, /* 0x90 */
1086 {1, 1, 3, 0, /* 0x91 */
1093 {0, 1, 3, 0, /* 0x92 */
1100 {1, 1, 3, 0, /* 0x93 */
1107 {0, 1, 3, 0, /* 0x94 */
1114 {1, 1, 4, 0, /* 0x95 */
1121 {0, 1, 3, 0, /* 0x96 */
1128 {1, 1, 3, 0, /* 0x97 */
1135 {0, 1, 2, 0, /* 0x98 */
1142 {1, 1, 3, 0, /* 0x99 */
1149 {0, 1, 3, 0, /* 0x9a */
1156 {1, 1, 3, 0, /* 0x9b */
1163 {0, 1, 2, 0, /* 0x9c */
1170 {1, 1, 3, 0, /* 0x9d */
1177 {0, 1, 2, 0, /* 0x9e */
1184 {1, 1, 2, 0, /* 0x9f */
1191 {0, 1, 2, 0, /* 0xa0 */
1198 {1, 1, 3, 0, /* 0xa1 */
1205 {0, 1, 3, 0, /* 0xa2 */
1212 {1, 1, 3, 0, /* 0xa3 */
1219 {0, 1, 3, 0, /* 0xa4 */
1226 {1, 1, 4, 0, /* 0xa5 */
1233 {0, 1, 3, 0, /* 0xa6 */
1240 {1, 1, 3, 0, /* 0xa7 */
1247 {0, 1, 3, 0, /* 0xa8 */
1254 {1, 1, 4, 0, /* 0xa9 */
1261 {0, 1, 4, 0, /* 0xaa */
1268 {1, 1, 4, 0, /* 0xab */
1275 {0, 1, 3, 0, /* 0xac */
1282 {1, 1, 4, 0, /* 0xad */
1289 {0, 1, 3, 0, /* 0xae */
1296 {1, 1, 3, 0, /* 0xaf */
1303 {0, 1, 2, 0, /* 0xb0 */
1310 {1, 1, 3, 0, /* 0xb1 */
1317 {0, 1, 3, 0, /* 0xb2 */
1324 {1, 1, 3, 0, /* 0xb3 */
1331 {0, 1, 3, 0, /* 0xb4 */
1338 {1, 1, 4, 0, /* 0xb5 */
1345 {0, 1, 3, 0, /* 0xb6 */
1352 {1, 1, 3, 0, /* 0xb7 */
1359 {0, 1, 2, 0, /* 0xb8 */
1366 {1, 1, 3, 0, /* 0xb9 */
1373 {0, 1, 3, 0, /* 0xba */
1380 {1, 1, 3, 0, /* 0xbb */
1387 {0, 1, 2, 0, /* 0xbc */
1394 {1, 1, 3, 0, /* 0xbd */
1401 {0, 1, 2, 0, /* 0xbe */
1408 {1, 1, 2, 0, /* 0xbf */
1415 {0, 1, 1, 0, /* 0xc0 */
1422 {1, 1, 2, 0, /* 0xc1 */
1429 {0, 1, 2, 0, /* 0xc2 */
1436 {1, 1, 2, 0, /* 0xc3 */
1443 {0, 1, 2, 0, /* 0xc4 */
1450 {1, 1, 3, 0, /* 0xc5 */
1457 {0, 1, 2, 0, /* 0xc6 */
1464 {1, 1, 2, 0, /* 0xc7 */
1471 {0, 1, 2, 0, /* 0xc8 */
1478 {1, 1, 3, 0, /* 0xc9 */
1485 {0, 1, 3, 0, /* 0xca */
1492 {1, 1, 3, 0, /* 0xcb */
1499 {0, 1, 2, 0, /* 0xcc */
1506 {1, 1, 3, 0, /* 0xcd */
1513 {0, 1, 2, 0, /* 0xce */
1520 {1, 1, 2, 0, /* 0xcf */
1527 {0, 1, 2, 0, /* 0xd0 */
1534 {1, 1, 3, 0, /* 0xd1 */
1541 {0, 1, 3, 0, /* 0xd2 */
1548 {1, 1, 3, 0, /* 0xd3 */
1555 {0, 1, 3, 0, /* 0xd4 */
1562 {1, 1, 4, 0, /* 0xd5 */
1569 {0, 1, 3, 0, /* 0xd6 */
1576 {1, 1, 3, 0, /* 0xd7 */
1583 {0, 1, 2, 0, /* 0xd8 */
1590 {1, 1, 3, 0, /* 0xd9 */
1597 {0, 1, 3, 0, /* 0xda */
1604 {1, 1, 3, 0, /* 0xdb */
1611 {0, 1, 2, 0, /* 0xdc */
1618 {1, 1, 3, 0, /* 0xdd */
1625 {0, 1, 2, 0, /* 0xde */
1632 {1, 1, 2, 0, /* 0xdf */
1639 {0, 1, 1, 0, /* 0xe0 */
1646 {1, 1, 2, 0, /* 0xe1 */
1653 {0, 1, 2, 0, /* 0xe2 */
1660 {1, 1, 2, 0, /* 0xe3 */
1667 {0, 1, 2, 0, /* 0xe4 */
1674 {1, 1, 3, 0, /* 0xe5 */
1681 {0, 1, 2, 0, /* 0xe6 */
1688 {1, 1, 2, 0, /* 0xe7 */
1695 {0, 1, 2, 0, /* 0xe8 */
1702 {1, 1, 3, 0, /* 0xe9 */
1709 {0, 1, 3, 0, /* 0xea */
1716 {1, 1, 3, 0, /* 0xeb */
1723 {0, 1, 2, 0, /* 0xec */
1730 {1, 1, 3, 0, /* 0xed */
1737 {0, 1, 2, 0, /* 0xee */
1744 {1, 1, 2, 0, /* 0xef */
1751 {0, 1, 1, 0, /* 0xf0 */
1758 {1, 1, 2, 0, /* 0xf1 */
1765 {0, 1, 2, 0, /* 0xf2 */
1772 {1, 1, 2, 0, /* 0xf3 */
1779 {0, 1, 2, 0, /* 0xf4 */
1786 {1, 1, 3, 0, /* 0xf5 */
1793 {0, 1, 2, 0, /* 0xf6 */
1800 {1, 1, 2, 0, /* 0xf7 */
1807 {0, 1, 1, 0, /* 0xf8 */
1814 {1, 1, 2, 0, /* 0xf9 */
1821 {0, 1, 2, 0, /* 0xfa */
1828 {1, 1, 2, 0, /* 0xfb */
1835 {0, 1, 1, 0, /* 0xfc */
1842 {1, 1, 2, 0, /* 0xfd */
1849 {0, 1, 1, 0, /* 0xfe */
1856 {1, 1, 1, 0, /* 0xff */
1867 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1868 struct sctp_scoping *scope,
1871 if ((scope->loopback_scope == 0) &&
1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1874 * skip loopback if not in scope *
1878 switch (ifa->address.sa.sa_family) {
1881 if (scope->ipv4_addr_legal) {
1882 struct sockaddr_in *sin;
1884 sin = &ifa->address.sin;
1885 if (sin->sin_addr.s_addr == 0) {
1886 /* not in scope , unspecified */
1889 if ((scope->ipv4_local_scope == 0) &&
1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1891 /* private address not in scope */
1901 if (scope->ipv6_addr_legal) {
1902 struct sockaddr_in6 *sin6;
1905 * Must update the flags, bummer, which means any
1906 * IFA locks must now be applied HERE <->
1909 sctp_gather_internal_ifa_flags(ifa);
1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1914 /* ok to use deprecated addresses? */
1915 sin6 = &ifa->address.sin6;
1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1917 /* skip unspecifed addresses */
1920 if ( /* (local_scope == 0) && */
1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1924 if ((scope->site_scope == 0) &&
1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1939 static struct mbuf *
1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1942 #if defined(INET) || defined(INET6)
1943 struct sctp_paramhdr *parmh;
1949 switch (ifa->address.sa.sa_family) {
1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1963 #if defined(INET) || defined(INET6)
1964 if (M_TRAILINGSPACE(m) >= plen) {
1965 /* easy side we just drop it on the end */
1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1969 /* Need more space */
1971 while (SCTP_BUF_NEXT(mret) != NULL) {
1972 mret = SCTP_BUF_NEXT(mret);
1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1975 if (SCTP_BUF_NEXT(mret) == NULL) {
1976 /* We are hosed, can't add more addresses */
1979 mret = SCTP_BUF_NEXT(mret);
1980 parmh = mtod(mret, struct sctp_paramhdr *);
1982 /* now add the parameter */
1983 switch (ifa->address.sa.sa_family) {
1987 struct sctp_ipv4addr_param *ipv4p;
1988 struct sockaddr_in *sin;
1990 sin = &ifa->address.sin;
1991 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1993 parmh->param_length = htons(plen);
1994 ipv4p->addr = sin->sin_addr.s_addr;
1995 SCTP_BUF_LEN(mret) += plen;
2002 struct sctp_ipv6addr_param *ipv6p;
2003 struct sockaddr_in6 *sin6;
2005 sin6 = &ifa->address.sin6;
2006 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2008 parmh->param_length = htons(plen);
2009 memcpy(ipv6p->addr, &sin6->sin6_addr,
2010 sizeof(ipv6p->addr));
2011 /* clear embedded scope in the address */
2012 in6_clearscope((struct in6_addr *)ipv6p->addr);
2013 SCTP_BUF_LEN(mret) += plen;
2029 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2030 struct sctp_scoping *scope,
2031 struct mbuf *m_at, int cnt_inits_to,
2032 uint16_t * padding_len, uint16_t * chunk_len)
2034 struct sctp_vrf *vrf = NULL;
2035 int cnt, limit_out = 0, total_count;
2038 vrf_id = inp->def_vrf_id;
2039 SCTP_IPI_ADDR_RLOCK();
2040 vrf = sctp_find_vrf(vrf_id);
2042 SCTP_IPI_ADDR_RUNLOCK();
2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2046 struct sctp_ifa *sctp_ifap;
2047 struct sctp_ifn *sctp_ifnp;
2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2052 cnt = SCTP_ADDRESS_LIMIT;
2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2056 if ((scope->loopback_scope == 0) &&
2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2059 * Skip loopback devices if loopback_scope
2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2068 &sctp_ifap->address.sin.sin_addr) != 0)) {
2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2086 if (cnt > SCTP_ADDRESS_LIMIT) {
2090 if (cnt > SCTP_ADDRESS_LIMIT) {
2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2099 if ((scope->loopback_scope == 0) &&
2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2102 * Skip loopback devices if
2103 * loopback_scope not set
2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2111 &sctp_ifap->address.sin.sin_addr) != 0)) {
2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2125 if (sctp_is_address_in_scope(sctp_ifap,
2129 if ((chunk_len != NULL) &&
2130 (padding_len != NULL) &&
2131 (*padding_len > 0)) {
2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2133 SCTP_BUF_LEN(m_at) += *padding_len;
2134 *chunk_len += *padding_len;
2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2148 if (total_count > SCTP_ADDRESS_LIMIT) {
2149 /* No more addresses */
2157 struct sctp_laddr *laddr;
2160 /* First, how many ? */
2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2162 if (laddr->ifa == NULL) {
2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2167 * Address being deleted by the system, dont
2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2173 * Address being deleted on this ep don't
2178 if (sctp_is_address_in_scope(laddr->ifa,
2185 * To get through a NAT we only list addresses if we have
2186 * more than one. That way if you just bind a single address
2187 * we let the source of the init dictate our address.
2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2192 if (laddr->ifa == NULL) {
2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2198 if (sctp_is_address_in_scope(laddr->ifa,
2202 if ((chunk_len != NULL) &&
2203 (padding_len != NULL) &&
2204 (*padding_len > 0)) {
2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2206 SCTP_BUF_LEN(m_at) += *padding_len;
2207 *chunk_len += *padding_len;
2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2212 if (cnt >= SCTP_ADDRESS_LIMIT) {
2218 SCTP_IPI_ADDR_RUNLOCK();
2222 static struct sctp_ifa *
2223 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2224 uint8_t dest_is_loop,
2225 uint8_t dest_is_priv,
2228 uint8_t dest_is_global = 0;
2230 /* dest_is_priv is true if destination is a private address */
2231 /* dest_is_loop is true if destination is a loopback addresses */
2234 * Here we determine if its a preferred address. A preferred address
2235 * means it is the same scope or higher scope then the destination.
2236 * L = loopback, P = private, G = global
2237 * -----------------------------------------
2238 * src | dest | result
2239 * ----------------------------------------
2241 * -----------------------------------------
2242 * P | L | yes-v4 no-v6
2243 * -----------------------------------------
2244 * G | L | yes-v4 no-v6
2245 * -----------------------------------------
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2257 * -----------------------------------------
2260 if (ifa->address.sa.sa_family != fam) {
2261 /* forget mis-matched family */
2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2269 /* Ok the address may be ok */
2271 if (fam == AF_INET6) {
2272 /* ok to use deprecated addresses? no lets not! */
2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2277 if (ifa->src_is_priv && !ifa->src_is_loop) {
2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2283 if (ifa->src_is_glob) {
2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2292 * Now that we know what is what, implement or table this could in
2293 * theory be done slicker (it used to be), but this is
2294 * straightforward and easier to validate :-)
2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2299 dest_is_loop, dest_is_priv, dest_is_global);
2301 if ((ifa->src_is_loop) && (dest_is_priv)) {
2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2305 if ((ifa->src_is_glob) && (dest_is_priv)) {
2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2309 if ((ifa->src_is_loop) && (dest_is_global)) {
2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2313 if ((ifa->src_is_priv) && (dest_is_global)) {
2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2318 /* its a preferred address */
2322 static struct sctp_ifa *
2323 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2324 uint8_t dest_is_loop,
2325 uint8_t dest_is_priv,
2328 uint8_t dest_is_global = 0;
2331 * Here we determine if its a acceptable address. A acceptable
2332 * address means it is the same scope or higher scope but we can
2333 * allow for NAT which means its ok to have a global dest and a
2336 * L = loopback, P = private, G = global
2337 * -----------------------------------------
2338 * src | dest | result
2339 * -----------------------------------------
2341 * -----------------------------------------
2342 * P | L | yes-v4 no-v6
2343 * -----------------------------------------
2345 * -----------------------------------------
2347 * -----------------------------------------
2349 * -----------------------------------------
2350 * G | P | yes - May not work
2351 * -----------------------------------------
2353 * -----------------------------------------
2354 * P | G | yes - May not work
2355 * -----------------------------------------
2357 * -----------------------------------------
2360 if (ifa->address.sa.sa_family != fam) {
2361 /* forget non matching family */
2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2363 ifa->address.sa.sa_family, fam);
2366 /* Ok the address may be ok */
2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2369 dest_is_loop, dest_is_priv);
2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2374 if (fam == AF_INET6) {
2375 /* ok to use deprecated addresses? */
2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2379 if (ifa->src_is_priv) {
2380 /* Special case, linklocal to loop */
2387 * Now that we know what is what, implement our table. This could in
2388 * theory be done slicker (it used to be), but this is
2389 * straightforward and easier to validate :-)
2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2404 /* its an acceptable address */
2409 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2411 struct sctp_laddr *laddr;
2414 /* There are no restrictions, no TCB :-) */
2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2418 if (laddr->ifa == NULL) {
2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2423 if (laddr->ifa == ifa) {
2424 /* Yes it is on the list */
2433 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2435 struct sctp_laddr *laddr;
2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2440 if (laddr->ifa == NULL) {
2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2445 if ((laddr->ifa == ifa) && laddr->action == 0)
2454 static struct sctp_ifa *
2455 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2458 int non_asoc_addr_ok,
2459 uint8_t dest_is_priv,
2460 uint8_t dest_is_loop,
2463 struct sctp_laddr *laddr, *starting_point;
2466 struct sctp_ifn *sctp_ifn;
2467 struct sctp_ifa *sctp_ifa, *sifa;
2468 struct sctp_vrf *vrf;
2471 vrf = sctp_find_vrf(vrf_id);
2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2479 * first question, is the ifn we will emit on in our list, if so, we
2480 * want such an address. Note that we first looked for a preferred
2484 /* is a preferred one on the interface we route out? */
2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2489 &sctp_ifa->address.sin.sin_addr) != 0)) {
2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2501 (non_asoc_addr_ok == 0))
2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2508 if (sctp_is_addr_in_ep(inp, sifa)) {
2509 atomic_add_int(&sifa->refcount, 1);
2515 * ok, now we now need to find one on the list of the addresses. We
2516 * can't get one on the emitting interface so let's find first a
2517 * preferred one. If not that an acceptable one otherwise... we
2520 starting_point = inp->next_addr_touse;
2522 if (inp->next_addr_touse == NULL) {
2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2526 for (laddr = inp->next_addr_touse; laddr;
2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2528 if (laddr->ifa == NULL) {
2529 /* address has been removed */
2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2533 /* address is being deleted */
2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2540 atomic_add_int(&sifa->refcount, 1);
2543 if (resettotop == 0) {
2544 inp->next_addr_touse = NULL;
2547 inp->next_addr_touse = starting_point;
2550 if (inp->next_addr_touse == NULL) {
2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2554 /* ok, what about an acceptable address in the inp */
2555 for (laddr = inp->next_addr_touse; laddr;
2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2557 if (laddr->ifa == NULL) {
2558 /* address has been removed */
2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2562 /* address is being deleted */
2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2569 atomic_add_int(&sifa->refcount, 1);
2572 if (resettotop == 0) {
2573 inp->next_addr_touse = NULL;
2574 goto once_again_too;
2577 * no address bound can be a source for the destination we are in
2585 static struct sctp_ifa *
2586 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2587 struct sctp_tcb *stcb,
2590 uint8_t dest_is_priv,
2591 uint8_t dest_is_loop,
2592 int non_asoc_addr_ok,
2595 struct sctp_laddr *laddr, *starting_point;
2597 struct sctp_ifn *sctp_ifn;
2598 struct sctp_ifa *sctp_ifa, *sifa;
2599 uint8_t start_at_beginning = 0;
2600 struct sctp_vrf *vrf;
2604 * first question, is the ifn we will emit on in our list, if so, we
2607 vrf = sctp_find_vrf(vrf_id);
2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2616 * first question, is the ifn we will emit on in our list? If so,
2617 * we want that one. First we look for a preferred. Second, we go
2618 * for an acceptable.
2621 /* first try for a preferred address on the ep */
2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2626 &sctp_ifa->address.sin.sin_addr) != 0)) {
2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2643 if (((non_asoc_addr_ok == 0) &&
2644 (sctp_is_addr_restricted(stcb, sifa))) ||
2645 (non_asoc_addr_ok &&
2646 (sctp_is_addr_restricted(stcb, sifa)) &&
2647 (!sctp_is_addr_pending(stcb, sifa)))) {
2648 /* on the no-no list */
2651 atomic_add_int(&sifa->refcount, 1);
2655 /* next try for an acceptable address on the ep */
2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2660 &sctp_ifa->address.sin.sin_addr) != 0)) {
2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2677 if (((non_asoc_addr_ok == 0) &&
2678 (sctp_is_addr_restricted(stcb, sifa))) ||
2679 (non_asoc_addr_ok &&
2680 (sctp_is_addr_restricted(stcb, sifa)) &&
2681 (!sctp_is_addr_pending(stcb, sifa)))) {
2682 /* on the no-no list */
2685 atomic_add_int(&sifa->refcount, 1);
2692 * if we can't find one like that then we must look at all addresses
2693 * bound to pick one at first preferable then secondly acceptable.
2695 starting_point = stcb->asoc.last_used_address;
2697 if (stcb->asoc.last_used_address == NULL) {
2698 start_at_beginning = 1;
2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2701 /* search beginning with the last used address */
2702 for (laddr = stcb->asoc.last_used_address; laddr;
2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2704 if (laddr->ifa == NULL) {
2705 /* address has been removed */
2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2709 /* address is being deleted */
2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2715 if (((non_asoc_addr_ok == 0) &&
2716 (sctp_is_addr_restricted(stcb, sifa))) ||
2717 (non_asoc_addr_ok &&
2718 (sctp_is_addr_restricted(stcb, sifa)) &&
2719 (!sctp_is_addr_pending(stcb, sifa)))) {
2720 /* on the no-no list */
2723 stcb->asoc.last_used_address = laddr;
2724 atomic_add_int(&sifa->refcount, 1);
2727 if (start_at_beginning == 0) {
2728 stcb->asoc.last_used_address = NULL;
2729 goto sctp_from_the_top;
2731 /* now try for any higher scope than the destination */
2732 stcb->asoc.last_used_address = starting_point;
2733 start_at_beginning = 0;
2735 if (stcb->asoc.last_used_address == NULL) {
2736 start_at_beginning = 1;
2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2739 /* search beginning with the last used address */
2740 for (laddr = stcb->asoc.last_used_address; laddr;
2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2742 if (laddr->ifa == NULL) {
2743 /* address has been removed */
2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2747 /* address is being deleted */
2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2754 if (((non_asoc_addr_ok == 0) &&
2755 (sctp_is_addr_restricted(stcb, sifa))) ||
2756 (non_asoc_addr_ok &&
2757 (sctp_is_addr_restricted(stcb, sifa)) &&
2758 (!sctp_is_addr_pending(stcb, sifa)))) {
2759 /* on the no-no list */
2762 stcb->asoc.last_used_address = laddr;
2763 atomic_add_int(&sifa->refcount, 1);
2766 if (start_at_beginning == 0) {
2767 stcb->asoc.last_used_address = NULL;
2768 goto sctp_from_the_top2;
2773 static struct sctp_ifa *
2774 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2775 struct sctp_inpcb *inp,
2776 struct sctp_tcb *stcb,
2777 int non_asoc_addr_ok,
2778 uint8_t dest_is_loop,
2779 uint8_t dest_is_priv,
2785 struct sctp_ifa *ifa, *sifa;
2786 int num_eligible_addr = 0;
2789 struct sockaddr_in6 sin6, lsa6;
2791 if (fam == AF_INET6) {
2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2793 (void)sa6_recoverscope(&sin6);
2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2798 if ((ifa->address.sa.sa_family == AF_INET) &&
2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin.sin_addr) != 0)) {
2805 if ((ifa->address.sa.sa_family == AF_INET6) &&
2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2807 &ifa->address.sin6.sin6_addr) != 0)) {
2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2812 (non_asoc_addr_ok == 0))
2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2819 if (fam == AF_INET6 &&
2821 sifa->src_is_loop && sifa->src_is_priv) {
2823 * don't allow fe80::1 to be a src on loop ::1, we
2824 * don't list it to the peer so we will get an
2829 if (fam == AF_INET6 &&
2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2833 * link-local <-> link-local must belong to the same
2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2837 (void)sa6_recoverscope(&lsa6);
2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2845 * Check if the IPv6 address matches to next-hop. In the
2846 * mobile case, old IPv6 address may be not deleted from the
2847 * interface. Then, the interface has previous and new
2848 * addresses. We should use one corresponding to the
2849 * next-hop. (by micchie)
2852 if (stcb && fam == AF_INET6 &&
2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2861 /* Avoid topologically incorrect IPv4 address */
2862 if (stcb && fam == AF_INET &&
2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2873 if (((non_asoc_addr_ok == 0) &&
2874 (sctp_is_addr_restricted(stcb, sifa))) ||
2875 (non_asoc_addr_ok &&
2876 (sctp_is_addr_restricted(stcb, sifa)) &&
2877 (!sctp_is_addr_pending(stcb, sifa)))) {
2879 * It is restricted for some reason..
2880 * probably not yet added.
2885 if (num_eligible_addr >= addr_wanted) {
2888 num_eligible_addr++;
2895 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2896 struct sctp_inpcb *inp,
2897 struct sctp_tcb *stcb,
2898 int non_asoc_addr_ok,
2899 uint8_t dest_is_loop,
2900 uint8_t dest_is_priv,
2903 struct sctp_ifa *ifa, *sifa;
2904 int num_eligible_addr = 0;
2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2908 if ((ifa->address.sa.sa_family == AF_INET) &&
2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin.sin_addr) != 0)) {
2915 if ((ifa->address.sa.sa_family == AF_INET6) &&
2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2918 &ifa->address.sin6.sin6_addr) != 0)) {
2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2923 (non_asoc_addr_ok == 0)) {
2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2935 if (((non_asoc_addr_ok == 0) &&
2936 (sctp_is_addr_restricted(stcb, sifa))) ||
2937 (non_asoc_addr_ok &&
2938 (sctp_is_addr_restricted(stcb, sifa)) &&
2939 (!sctp_is_addr_pending(stcb, sifa)))) {
2941 * It is restricted for some reason..
2942 * probably not yet added.
2947 num_eligible_addr++;
2949 return (num_eligible_addr);
2952 static struct sctp_ifa *
2953 sctp_choose_boundall(struct sctp_inpcb *inp,
2954 struct sctp_tcb *stcb,
2955 struct sctp_nets *net,
2958 uint8_t dest_is_priv,
2959 uint8_t dest_is_loop,
2960 int non_asoc_addr_ok,
2963 int cur_addr_num = 0, num_preferred = 0;
2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2966 struct sctp_ifa *sctp_ifa, *sifa;
2968 struct sctp_vrf *vrf;
2976 * For boundall we can use any address in the association.
2977 * If non_asoc_addr_ok is set we can use any address (at least in
2978 * theory). So we look for preferred addresses first. If we find one,
2979 * we use it. Otherwise we next try to get an address on the
2980 * interface, which we should be able to do (unless non_asoc_addr_ok
2981 * is false and we are routed out that way). In these cases where we
2982 * can't use the address of the interface we go through all the
2983 * ifn's looking for an address we can use and fill that in. Punting
2984 * means we send back address 0, which will probably cause problems
2985 * actually since then IP will fill in the address of the route ifn,
2986 * which means we probably already rejected it.. i.e. here comes an
2989 vrf = sctp_find_vrf(vrf_id);
2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2997 if (sctp_ifn == NULL) {
2998 /* ?? We don't have this guy ?? */
2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
3000 goto bound_all_plan_b;
3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3003 ifn_index, sctp_ifn->ifn_name);
3006 cur_addr_num = net->indx_of_eligible_next_to_use;
3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3014 num_preferred, sctp_ifn->ifn_name);
3015 if (num_preferred == 0) {
3017 * no eligible addresses, we must use some other interface
3018 * address if we can find one.
3020 goto bound_all_plan_b;
3023 * Ok we have num_eligible_addr set with how many we can use, this
3024 * may vary from call to call due to addresses being deprecated
3027 if (cur_addr_num >= num_preferred) {
3031 * select the nth address from the list (where cur_addr_num is the
3032 * nth) and 0 is the first one, 1 is the second one etc...
3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3037 dest_is_priv, cur_addr_num, fam, ro);
3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3041 atomic_add_int(&sctp_ifa->refcount, 1);
3043 /* save off where the next one we will want */
3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3049 * plan_b: Look at all interfaces and find a preferred address. If
3050 * no preferred fall through to plan_c.
3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3056 sctp_ifn->ifn_name);
3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3058 /* wrong base scope */
3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3062 if ((sctp_ifn == looked_at) && looked_at) {
3063 /* already looked at this guy */
3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3068 dest_is_loop, dest_is_priv, fam);
3069 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3070 "Found ifn:%p %d preferred source addresses\n",
3071 ifn, num_preferred);
3072 if (num_preferred == 0) {
3073 /* None on this interface. */
3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No preferred -- skipping to next\n");
3077 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3078 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3079 num_preferred, (void *)sctp_ifn, cur_addr_num);
3082 * Ok we have num_eligible_addr set with how many we can
3083 * use, this may vary from call to call due to addresses
3084 * being deprecated etc..
3086 if (cur_addr_num >= num_preferred) {
3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3090 dest_is_priv, cur_addr_num, fam, ro);
3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3102 atomic_add_int(&sifa->refcount, 1);
3106 again_with_private_addresses_allowed:
3108 /* plan_c: do we have an acceptable address on the emit interface */
3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3111 if (emit_ifn == NULL) {
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3120 &sctp_ifa->address.sin.sin_addr) != 0)) {
3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3134 (non_asoc_addr_ok == 0)) {
3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3150 if (((non_asoc_addr_ok == 0) &&
3151 (sctp_is_addr_restricted(stcb, sifa))) ||
3152 (non_asoc_addr_ok &&
3153 (sctp_is_addr_restricted(stcb, sifa)) &&
3154 (!sctp_is_addr_pending(stcb, sifa)))) {
3156 * It is restricted for some reason..
3157 * probably not yet added.
3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its restricted\n");
3164 atomic_add_int(&sifa->refcount, 1);
3169 * plan_d: We are in trouble. No preferred address on the emit
3170 * interface. And not even a preferred address on all interfaces. Go
3171 * out and see if we can find an acceptable address somewhere
3172 * amongst all interfaces.
3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3177 /* wrong base scope */
3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3184 &sctp_ifa->address.sin.sin_addr) != 0)) {
3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3196 (non_asoc_addr_ok == 0))
3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3208 if (((non_asoc_addr_ok == 0) &&
3209 (sctp_is_addr_restricted(stcb, sifa))) ||
3210 (non_asoc_addr_ok &&
3211 (sctp_is_addr_restricted(stcb, sifa)) &&
3212 (!sctp_is_addr_pending(stcb, sifa)))) {
3214 * It is restricted for some
3215 * reason.. probably not yet added.
3226 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3227 stcb->asoc.scope.ipv4_local_scope = 1;
3229 goto again_with_private_addresses_allowed;
3230 } else if (retried == 1) {
3231 stcb->asoc.scope.ipv4_local_scope = 0;
3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3241 /* wrong base scope */
3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3245 struct sctp_ifa *tmp_sifa;
3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3250 &sctp_ifa->address.sin.sin_addr) != 0)) {
3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3262 (non_asoc_addr_ok == 0))
3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3267 if (tmp_sifa == NULL) {
3270 if (tmp_sifa == sifa) {
3274 if (sctp_is_address_in_scope(tmp_sifa,
3275 &stcb->asoc.scope, 0) == 0) {
3278 if (((non_asoc_addr_ok == 0) &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3280 (non_asoc_addr_ok &&
3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3294 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3299 atomic_add_int(&sifa->refcount, 1);
3307 /* tcb may be NULL */
3309 sctp_source_address_selection(struct sctp_inpcb *inp,
3310 struct sctp_tcb *stcb,
3312 struct sctp_nets *net,
3313 int non_asoc_addr_ok, uint32_t vrf_id)
3315 struct sctp_ifa *answer;
3316 uint8_t dest_is_priv, dest_is_loop;
3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3330 * - Find the route if needed, cache if I can.
3331 * - Look at interface address in route, Is it in the bound list. If so we
3332 * have the best source.
3333 * - If not we must rotate amongst the addresses.
3337 * Do we need to pay attention to scope. We can have a private address
3338 * or a global address we are sourcing or sending to. So if we draw
3340 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3342 * ------------------------------------------
3343 * source * dest * result
3344 * -----------------------------------------
3345 * <a> Private * Global * NAT
3346 * -----------------------------------------
3347 * <b> Private * Private * No problem
3348 * -----------------------------------------
3349 * <c> Global * Private * Huh, How will this work?
3350 * -----------------------------------------
3351 * <d> Global * Global * No Problem
3352 *------------------------------------------
3353 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3355 *------------------------------------------
3356 * source * dest * result
3357 * -----------------------------------------
3358 * <a> Linklocal * Global *
3359 * -----------------------------------------
3360 * <b> Linklocal * Linklocal * No problem
3361 * -----------------------------------------
3362 * <c> Global * Linklocal * Huh, How will this work?
3363 * -----------------------------------------
3364 * <d> Global * Global * No Problem
3365 *------------------------------------------
3366 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3368 * And then we add to that what happens if there are multiple addresses
3369 * assigned to an interface. Remember the ifa on a ifn is a linked
3370 * list of addresses. So one interface can have more than one IP
3371 * address. What happens if we have both a private and a global
3372 * address? Do we then use context of destination to sort out which
3373 * one is best? And what about NAT's sending P->G may get you a NAT
3374 * translation, or should you select the G thats on the interface in
3379 * - count the number of addresses on the interface.
3380 * - if it is one, no problem except case <c>.
3381 * For <a> we will assume a NAT out there.
3382 * - if there are more than one, then we need to worry about scope P
3383 * or G. We should prefer G -> G and P -> P if possible.
3384 * Then as a secondary fall back to mixed types G->P being a last
3386 * - The above all works for bound all, but bound specific we need to
3387 * use the same concept but instead only consider the bound
3388 * addresses. If the bound set is NOT assigned to the interface then
3389 * we must use rotation amongst the bound addresses..
3391 if (ro->ro_rt == NULL) {
3393 * Need a route to cache.
3395 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
3397 if (ro->ro_rt == NULL) {
3400 fam = ro->ro_dst.sa_family;
3401 dest_is_priv = dest_is_loop = 0;
3402 /* Setup our scopes for the destination */
3406 /* Scope based on outbound address */
3407 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3410 /* mark it as local */
3411 net->addr_is_local = 1;
3413 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3420 /* Scope based on outbound address */
3421 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3422 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3424 * If the address is a loopback address, which
3425 * consists of "::1" OR "fe80::1%lo0", we are
3426 * loopback scope. But we don't use dest_is_priv
3427 * (link local addresses).
3431 /* mark it as local */
3432 net->addr_is_local = 1;
3434 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3440 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3441 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3442 SCTP_IPI_ADDR_RLOCK();
3443 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3447 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3448 dest_is_priv, dest_is_loop,
3449 non_asoc_addr_ok, fam);
3450 SCTP_IPI_ADDR_RUNLOCK();
3457 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3458 vrf_id, dest_is_priv,
3460 non_asoc_addr_ok, fam);
3462 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3467 SCTP_IPI_ADDR_RUNLOCK();
3472 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3475 int tlen, at, found;
3476 struct sctp_sndinfo sndinfo;
3477 struct sctp_prinfo prinfo;
3478 struct sctp_authinfo authinfo;
3480 tlen = SCTP_BUF_LEN(control);
3484 * Independent of how many mbufs, find the c_type inside the control
3485 * structure and copy out the data.
3488 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3489 /* There is not enough room for one more. */
3492 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3493 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3494 /* We dont't have a complete CMSG header. */
3497 if (((int)cmh.cmsg_len + at) > tlen) {
3498 /* We don't have the complete CMSG. */
3501 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3502 ((c_type == cmh.cmsg_type) ||
3503 ((c_type == SCTP_SNDRCV) &&
3504 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3505 (cmh.cmsg_type == SCTP_PRINFO) ||
3506 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3507 if (c_type == cmh.cmsg_type) {
3508 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3511 /* It is exactly what we want. Copy it out. */
3512 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), (int)cpsize, (caddr_t)data);
3515 struct sctp_sndrcvinfo *sndrcvinfo;
3517 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3519 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3522 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3524 switch (cmh.cmsg_type) {
3526 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3529 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3530 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3531 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3532 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3533 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3534 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3537 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3540 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3541 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3542 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3544 sndrcvinfo->sinfo_timetolive = 0;
3546 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3549 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3552 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3553 sndrcvinfo->sinfo_keynumber_valid = 1;
3554 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3562 at += CMSG_ALIGN(cmh.cmsg_len);
3568 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3572 struct sctp_initmsg initmsg;
3575 struct sockaddr_in sin;
3579 struct sockaddr_in6 sin6;
3583 tlen = SCTP_BUF_LEN(control);
3586 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3587 /* There is not enough room for one more. */
3591 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3592 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3593 /* We dont't have a complete CMSG header. */
3597 if (((int)cmh.cmsg_len + at) > tlen) {
3598 /* We don't have the complete CMSG. */
3602 if (cmh.cmsg_level == IPPROTO_SCTP) {
3603 switch (cmh.cmsg_type) {
3605 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3609 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3610 if (initmsg.sinit_max_attempts)
3611 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3612 if (initmsg.sinit_num_ostreams)
3613 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3614 if (initmsg.sinit_max_instreams)
3615 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3616 if (initmsg.sinit_max_init_timeo)
3617 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3618 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3619 struct sctp_stream_out *tmp_str;
3622 #if defined(SCTP_DETAILED_STR_STATS)
3627 /* Default is NOT correct */
3628 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3629 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3630 SCTP_TCB_UNLOCK(stcb);
3631 SCTP_MALLOC(tmp_str,
3632 struct sctp_stream_out *,
3633 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3635 SCTP_TCB_LOCK(stcb);
3636 if (tmp_str != NULL) {
3637 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3638 stcb->asoc.strmout = tmp_str;
3639 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3641 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3643 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3644 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3645 stcb->asoc.strmout[i].chunks_on_queues = 0;
3646 stcb->asoc.strmout[i].next_mid_ordered = 0;
3647 stcb->asoc.strmout[i].next_mid_unordered = 0;
3648 #if defined(SCTP_DETAILED_STR_STATS)
3649 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3650 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3651 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3654 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3655 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3657 stcb->asoc.strmout[i].stream_no = i;
3658 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3659 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3660 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
3665 case SCTP_DSTADDRV4:
3666 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3670 memset(&sin, 0, sizeof(struct sockaddr_in));
3671 sin.sin_family = AF_INET;
3672 sin.sin_len = sizeof(struct sockaddr_in);
3673 sin.sin_port = stcb->rport;
3674 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3675 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3676 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3677 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3681 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3682 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3689 case SCTP_DSTADDRV6:
3690 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3694 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3695 sin6.sin6_family = AF_INET6;
3696 sin6.sin6_len = sizeof(struct sockaddr_in6);
3697 sin6.sin6_port = stcb->rport;
3698 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3699 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3700 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3705 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3706 in6_sin6_2_sin(&sin, &sin6);
3707 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3708 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3709 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3713 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3714 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3720 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3721 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3731 at += CMSG_ALIGN(cmh.cmsg_len);
3736 static struct sctp_tcb *
3737 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3739 struct mbuf *control,
3740 struct sctp_nets **net_p,
3745 struct sctp_tcb *stcb;
3746 struct sockaddr *addr;
3749 struct sockaddr_in sin;
3753 struct sockaddr_in6 sin6;
3757 tlen = SCTP_BUF_LEN(control);
3760 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3761 /* There is not enough room for one more. */
3765 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3766 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3767 /* We dont't have a complete CMSG header. */
3771 if (((int)cmh.cmsg_len + at) > tlen) {
3772 /* We don't have the complete CMSG. */
3776 if (cmh.cmsg_level == IPPROTO_SCTP) {
3777 switch (cmh.cmsg_type) {
3779 case SCTP_DSTADDRV4:
3780 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3784 memset(&sin, 0, sizeof(struct sockaddr_in));
3785 sin.sin_family = AF_INET;
3786 sin.sin_len = sizeof(struct sockaddr_in);
3787 sin.sin_port = port;
3788 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3789 addr = (struct sockaddr *)&sin;
3793 case SCTP_DSTADDRV6:
3794 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3798 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3799 sin6.sin6_family = AF_INET6;
3800 sin6.sin6_len = sizeof(struct sockaddr_in6);
3801 sin6.sin6_port = port;
3802 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3804 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3805 in6_sin6_2_sin(&sin, &sin6);
3806 addr = (struct sockaddr *)&sin;
3809 addr = (struct sockaddr *)&sin6;
3817 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3823 at += CMSG_ALIGN(cmh.cmsg_len);
3828 static struct mbuf *
3829 sctp_add_cookie(struct mbuf *init, int init_offset,
3830 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3832 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3833 struct sctp_state_cookie *stc;
3834 struct sctp_paramhdr *ph;
3839 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3840 sizeof(struct sctp_paramhdr)), 0,
3841 M_NOWAIT, 1, MT_DATA);
3845 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3846 if (copy_init == NULL) {
3850 #ifdef SCTP_MBUF_LOGGING
3851 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3852 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3855 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3857 if (copy_initack == NULL) {
3859 sctp_m_freem(copy_init);
3862 #ifdef SCTP_MBUF_LOGGING
3863 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3864 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3867 /* easy side we just drop it on the end */
3868 ph = mtod(mret, struct sctp_paramhdr *);
3869 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3870 sizeof(struct sctp_paramhdr);
3871 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3872 sizeof(struct sctp_paramhdr));
3873 ph->param_type = htons(SCTP_STATE_COOKIE);
3874 ph->param_length = 0; /* fill in at the end */
3875 /* Fill in the stc cookie data */
3876 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3878 /* tack the INIT and then the INIT-ACK onto the chain */
3880 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3881 cookie_sz += SCTP_BUF_LEN(m_at);
3882 if (SCTP_BUF_NEXT(m_at) == NULL) {
3883 SCTP_BUF_NEXT(m_at) = copy_init;
3887 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3888 cookie_sz += SCTP_BUF_LEN(m_at);
3889 if (SCTP_BUF_NEXT(m_at) == NULL) {
3890 SCTP_BUF_NEXT(m_at) = copy_initack;
3894 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3895 cookie_sz += SCTP_BUF_LEN(m_at);
3896 if (SCTP_BUF_NEXT(m_at) == NULL) {
3900 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3902 /* no space, so free the entire chain */
3906 SCTP_BUF_LEN(sig) = 0;
3907 SCTP_BUF_NEXT(m_at) = sig;
3909 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3910 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3912 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3913 cookie_sz += SCTP_SIGNATURE_SIZE;
3914 ph->param_length = htons(cookie_sz);
3920 sctp_get_ect(struct sctp_tcb *stcb)
3922 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3923 return (SCTP_ECT0_BIT);
3929 #if defined(INET) || defined(INET6)
3931 sctp_handle_no_route(struct sctp_tcb *stcb,
3932 struct sctp_nets *net,
3935 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3938 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3939 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3940 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3941 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3942 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3943 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3947 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3948 net->dest_state &= ~SCTP_ADDR_PF;
3952 if (net == stcb->asoc.primary_destination) {
3953 /* need a new primary */
3954 struct sctp_nets *alt;
3956 alt = sctp_find_alternate_net(stcb, net, 0);
3958 if (stcb->asoc.alternate) {
3959 sctp_free_remote_addr(stcb->asoc.alternate);
3961 stcb->asoc.alternate = alt;
3962 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3963 if (net->ro._s_addr) {
3964 sctp_free_ifa(net->ro._s_addr);
3965 net->ro._s_addr = NULL;
3967 net->src_addr_selected = 0;
3977 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3978 struct sctp_tcb *stcb, /* may be NULL */
3979 struct sctp_nets *net,
3980 struct sockaddr *to,
3982 uint32_t auth_offset,
3983 struct sctp_auth_chunk *auth,
3984 uint16_t auth_keyid,
3985 int nofragment_flag,
3992 union sctp_sockstore *over_addr,
3993 uint8_t mflowtype, uint32_t mflowid,
3994 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3995 int so_locked SCTP_UNUSED
4000 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4003 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4004 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4005 * - fill in the HMAC digest of any AUTH chunk in the packet.
4006 * - calculate and fill in the SCTP checksum.
4007 * - prepend an IP address header.
4008 * - if boundall use INADDR_ANY.
4009 * - if boundspecific do source address selection.
4010 * - set fragmentation option for ipV4.
4011 * - On return from IP output, check/adjust mtu size of output
4012 * interface and smallest_mtu size as well.
4014 /* Will need ifdefs around this */
4016 struct sctphdr *sctphdr;
4020 #if defined(INET) || defined(INET6)
4024 #if defined(INET) || defined(INET6)
4026 sctp_route_t *ro = NULL;
4027 struct udphdr *udp = NULL;
4032 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4033 struct socket *so = NULL;
4037 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4038 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4042 #if defined(INET) || defined(INET6)
4044 vrf_id = stcb->asoc.vrf_id;
4046 vrf_id = inp->def_vrf_id;
4049 /* fill in the HMAC digest for any AUTH chunk in the packet */
4050 if ((auth != NULL) && (stcb != NULL)) {
4051 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4054 tos_value = net->dscp;
4056 tos_value = stcb->asoc.default_dscp;
4058 tos_value = inp->sctp_ep.default_dscp;
4061 switch (to->sa_family) {
4065 struct ip *ip = NULL;
4066 sctp_route_t iproute;
4069 len = SCTP_MIN_V4_OVERHEAD;
4071 len += sizeof(struct udphdr);
4073 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4076 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4079 SCTP_ALIGN_TO_END(newm, len);
4080 SCTP_BUF_LEN(newm) = len;
4081 SCTP_BUF_NEXT(newm) = m;
4084 m->m_pkthdr.flowid = net->flowid;
4085 M_HASHTYPE_SET(m, net->flowtype);
4087 m->m_pkthdr.flowid = mflowid;
4088 M_HASHTYPE_SET(m, mflowtype);
4090 packet_length = sctp_calculate_len(m);
4091 ip = mtod(m, struct ip *);
4092 ip->ip_v = IPVERSION;
4093 ip->ip_hl = (sizeof(struct ip) >> 2);
4094 if (tos_value == 0) {
4096 * This means especially, that it is not set
4097 * at the SCTP layer. So use the value from
4100 tos_value = inp->ip_inp.inp.inp_ip_tos;
4104 tos_value |= sctp_get_ect(stcb);
4106 if ((nofragment_flag) && (port == 0)) {
4107 ip->ip_off = htons(IP_DF);
4109 ip->ip_off = htons(0);
4111 /* FreeBSD has a function for ip_id's */
4114 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4115 ip->ip_len = htons(packet_length);
4116 ip->ip_tos = tos_value;
4118 ip->ip_p = IPPROTO_UDP;
4120 ip->ip_p = IPPROTO_SCTP;
4125 memset(&iproute, 0, sizeof(iproute));
4126 memcpy(&ro->ro_dst, to, to->sa_len);
4128 ro = (sctp_route_t *) & net->ro;
4130 /* Now the address selection part */
4131 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4133 /* call the routine to select the src address */
4134 if (net && out_of_asoc_ok == 0) {
4135 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4136 sctp_free_ifa(net->ro._s_addr);
4137 net->ro._s_addr = NULL;
4138 net->src_addr_selected = 0;
4144 if (net->src_addr_selected == 0) {
4145 /* Cache the source address */
4146 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4149 net->src_addr_selected = 1;
4151 if (net->ro._s_addr == NULL) {
4152 /* No route to host */
4153 net->src_addr_selected = 0;
4154 sctp_handle_no_route(stcb, net, so_locked);
4155 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4157 return (EHOSTUNREACH);
4159 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4161 if (over_addr == NULL) {
4162 struct sctp_ifa *_lsrc;
4164 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4168 if (_lsrc == NULL) {
4169 sctp_handle_no_route(stcb, net, so_locked);
4170 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4172 return (EHOSTUNREACH);
4174 ip->ip_src = _lsrc->address.sin.sin_addr;
4175 sctp_free_ifa(_lsrc);
4177 ip->ip_src = over_addr->sin.sin_addr;
4178 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4182 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4183 sctp_handle_no_route(stcb, net, so_locked);
4184 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4186 return (EHOSTUNREACH);
4188 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4189 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4190 udp->uh_dport = port;
4191 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip)));
4193 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4197 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4199 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4202 sctphdr->src_port = src_port;
4203 sctphdr->dest_port = dest_port;
4204 sctphdr->v_tag = v_tag;
4205 sctphdr->checksum = 0;
4208 * If source address selection fails and we find no
4209 * route then the ip_output should fail as well with
4210 * a NO_ROUTE_TO_HOST type error. We probably should
4211 * catch that somewhere and abort the association
4212 * right away (assuming this is an INIT being sent).
4214 if (ro->ro_rt == NULL) {
4216 * src addr selection failed to find a route
4217 * (or valid source addr), so we can't get
4218 * there from here (yet)!
4220 sctp_handle_no_route(stcb, net, so_locked);
4221 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4223 return (EHOSTUNREACH);
4225 if (ro != &iproute) {
4226 memcpy(&iproute, ro, sizeof(*ro));
4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4229 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4230 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4231 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4232 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4235 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4236 /* failed to prepend data, give up */
4237 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4241 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4243 #if defined(SCTP_WITH_NO_CSUM)
4244 SCTP_STAT_INCR(sctps_sendnocrc);
4246 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4247 SCTP_STAT_INCR(sctps_sendswcrc);
4250 SCTP_ENABLE_UDP_CSUM(o_pak);
4253 #if defined(SCTP_WITH_NO_CSUM)
4254 SCTP_STAT_INCR(sctps_sendnocrc);
4256 m->m_pkthdr.csum_flags = CSUM_SCTP;
4257 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4258 SCTP_STAT_INCR(sctps_sendhwcrc);
4261 #ifdef SCTP_PACKET_LOGGING
4262 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4263 sctp_packet_log(o_pak);
4265 /* send it out. table id is taken from stcb */
4266 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4267 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4268 so = SCTP_INP_SO(inp);
4269 SCTP_SOCKET_UNLOCK(so, 0);
4272 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4273 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4274 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4275 atomic_add_int(&stcb->asoc.refcnt, 1);
4276 SCTP_TCB_UNLOCK(stcb);
4277 SCTP_SOCKET_LOCK(so, 0);
4278 SCTP_TCB_LOCK(stcb);
4279 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4282 SCTP_STAT_INCR(sctps_sendpackets);
4283 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4285 SCTP_STAT_INCR(sctps_senderrors);
4287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4289 /* free tempy routes */
4293 * PMTU check versus smallest asoc MTU goes
4296 if ((ro->ro_rt != NULL) &&
4297 (net->ro._s_addr)) {
4300 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4302 mtu -= sizeof(struct udphdr);
4304 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4305 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4308 } else if (ro->ro_rt == NULL) {
4309 /* route was freed */
4310 if (net->ro._s_addr &&
4311 net->src_addr_selected) {
4312 sctp_free_ifa(net->ro._s_addr);
4313 net->ro._s_addr = NULL;
4315 net->src_addr_selected = 0;
4324 uint32_t flowlabel, flowinfo;
4325 struct ip6_hdr *ip6h;
4326 struct route_in6 ip6route;
4328 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4330 struct sockaddr_in6 lsa6_storage;
4332 u_short prev_port = 0;
4336 flowlabel = net->flowlabel;
4338 flowlabel = stcb->asoc.default_flowlabel;
4340 flowlabel = inp->sctp_ep.default_flowlabel;
4342 if (flowlabel == 0) {
4344 * This means especially, that it is not set
4345 * at the SCTP layer. So use the value from
4348 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4350 flowlabel &= 0x000fffff;
4351 len = SCTP_MIN_OVERHEAD;
4353 len += sizeof(struct udphdr);
4355 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4358 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4361 SCTP_ALIGN_TO_END(newm, len);
4362 SCTP_BUF_LEN(newm) = len;
4363 SCTP_BUF_NEXT(newm) = m;
4366 m->m_pkthdr.flowid = net->flowid;
4367 M_HASHTYPE_SET(m, net->flowtype);
4369 m->m_pkthdr.flowid = mflowid;
4370 M_HASHTYPE_SET(m, mflowtype);
4372 packet_length = sctp_calculate_len(m);
4374 ip6h = mtod(m, struct ip6_hdr *);
4375 /* protect *sin6 from overwrite */
4376 sin6 = (struct sockaddr_in6 *)to;
4380 /* KAME hack: embed scopeid */
4381 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4382 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4386 memset(&ip6route, 0, sizeof(ip6route));
4387 ro = (sctp_route_t *) & ip6route;
4388 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4390 ro = (sctp_route_t *) & net->ro;
4393 * We assume here that inp_flow is in host byte
4394 * order within the TCB!
4396 if (tos_value == 0) {
4398 * This means especially, that it is not set
4399 * at the SCTP layer. So use the value from
4402 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4406 tos_value |= sctp_get_ect(stcb);
4410 flowinfo |= tos_value;
4412 flowinfo |= flowlabel;
4413 ip6h->ip6_flow = htonl(flowinfo);
4415 ip6h->ip6_nxt = IPPROTO_UDP;
4417 ip6h->ip6_nxt = IPPROTO_SCTP;
4419 ip6h->ip6_plen = (uint16_t) (packet_length - sizeof(struct ip6_hdr));
4420 ip6h->ip6_dst = sin6->sin6_addr;
4423 * Add SRC address selection here: we can only reuse
4424 * to a limited degree the kame src-addr-sel, since
4425 * we can try their selection but it may not be
4428 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4429 lsa6_tmp.sin6_family = AF_INET6;
4430 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4432 if (net && out_of_asoc_ok == 0) {
4433 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4434 sctp_free_ifa(net->ro._s_addr);
4435 net->ro._s_addr = NULL;
4436 net->src_addr_selected = 0;
4442 if (net->src_addr_selected == 0) {
4443 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4444 /* KAME hack: embed scopeid */
4445 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4446 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4449 /* Cache the source address */
4450 net->ro._s_addr = sctp_source_address_selection(inp,
4456 (void)sa6_recoverscope(sin6);
4457 net->src_addr_selected = 1;
4459 if (net->ro._s_addr == NULL) {
4460 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4461 net->src_addr_selected = 0;
4462 sctp_handle_no_route(stcb, net, so_locked);
4463 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4465 return (EHOSTUNREACH);
4467 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4469 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4470 /* KAME hack: embed scopeid */
4471 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4472 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4475 if (over_addr == NULL) {
4476 struct sctp_ifa *_lsrc;
4478 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4482 if (_lsrc == NULL) {
4483 sctp_handle_no_route(stcb, net, so_locked);
4484 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4486 return (EHOSTUNREACH);
4488 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4489 sctp_free_ifa(_lsrc);
4491 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4492 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4494 (void)sa6_recoverscope(sin6);
4496 lsa6->sin6_port = inp->sctp_lport;
4498 if (ro->ro_rt == NULL) {
4500 * src addr selection failed to find a route
4501 * (or valid source addr), so we can't get
4504 sctp_handle_no_route(stcb, net, so_locked);
4505 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4507 return (EHOSTUNREACH);
4510 * XXX: sa6 may not have a valid sin6_scope_id in
4511 * the non-SCOPEDROUTING case.
4513 bzero(&lsa6_storage, sizeof(lsa6_storage));
4514 lsa6_storage.sin6_family = AF_INET6;
4515 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4516 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4517 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4518 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4523 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4524 lsa6_storage.sin6_port = inp->sctp_lport;
4525 lsa6 = &lsa6_storage;
4526 ip6h->ip6_src = lsa6->sin6_addr;
4529 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4530 sctp_handle_no_route(stcb, net, so_locked);
4531 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4533 return (EHOSTUNREACH);
4535 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4536 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4537 udp->uh_dport = port;
4538 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip6_hdr)));
4540 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4542 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4545 sctphdr->src_port = src_port;
4546 sctphdr->dest_port = dest_port;
4547 sctphdr->v_tag = v_tag;
4548 sctphdr->checksum = 0;
4551 * We set the hop limit now since there is a good
4552 * chance that our ro pointer is now filled
4554 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4555 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4558 /* Copy to be sure something bad is not happening */
4559 sin6->sin6_addr = ip6h->ip6_dst;
4560 lsa6->sin6_addr = ip6h->ip6_src;
4563 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4565 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4566 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4567 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4569 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4571 * preserve the port and scope for link
4574 prev_scope = sin6->sin6_scope_id;
4575 prev_port = sin6->sin6_port;
4577 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4578 /* failed to prepend data, give up */
4580 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4583 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4585 #if defined(SCTP_WITH_NO_CSUM)
4586 SCTP_STAT_INCR(sctps_sendnocrc);
4588 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4589 SCTP_STAT_INCR(sctps_sendswcrc);
4591 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4592 udp->uh_sum = 0xffff;
4595 #if defined(SCTP_WITH_NO_CSUM)
4596 SCTP_STAT_INCR(sctps_sendnocrc);
4598 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4599 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4600 SCTP_STAT_INCR(sctps_sendhwcrc);
4603 /* send it out. table id is taken from stcb */
4604 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4605 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4606 so = SCTP_INP_SO(inp);
4607 SCTP_SOCKET_UNLOCK(so, 0);
4610 #ifdef SCTP_PACKET_LOGGING
4611 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4612 sctp_packet_log(o_pak);
4614 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4615 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4616 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4617 atomic_add_int(&stcb->asoc.refcnt, 1);
4618 SCTP_TCB_UNLOCK(stcb);
4619 SCTP_SOCKET_LOCK(so, 0);
4620 SCTP_TCB_LOCK(stcb);
4621 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4625 /* for link local this must be done */
4626 sin6->sin6_scope_id = prev_scope;
4627 sin6->sin6_port = prev_port;
4629 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4630 SCTP_STAT_INCR(sctps_sendpackets);
4631 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4633 SCTP_STAT_INCR(sctps_senderrors);
4636 /* Now if we had a temp route free it */
4640 * PMTU check versus smallest asoc MTU goes
4643 if (ro->ro_rt == NULL) {
4644 /* Route was freed */
4645 if (net->ro._s_addr &&
4646 net->src_addr_selected) {
4647 sctp_free_ifa(net->ro._s_addr);
4648 net->ro._s_addr = NULL;
4650 net->src_addr_selected = 0;
4652 if ((ro->ro_rt != NULL) &&
4653 (net->ro._s_addr)) {
4656 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4658 (stcb->asoc.smallest_mtu > mtu)) {
4659 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4662 net->mtu -= sizeof(struct udphdr);
4666 if (ND_IFINFO(ifp)->linkmtu &&
4667 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4668 sctp_mtu_size_reset(inp,
4670 ND_IFINFO(ifp)->linkmtu);
4678 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4679 ((struct sockaddr *)to)->sa_family);
4681 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4688 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4689 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4694 struct mbuf *m, *m_last;
4695 struct sctp_nets *net;
4696 struct sctp_init_chunk *init;
4697 struct sctp_supported_addr_param *sup_addr;
4698 struct sctp_adaptation_layer_indication *ali;
4699 struct sctp_supported_chunk_types_param *pr_supported;
4700 struct sctp_paramhdr *ph;
4701 int cnt_inits_to = 0;
4703 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4705 /* INIT's always go to the primary (and usually ONLY address) */
4706 net = stcb->asoc.primary_destination;
4708 net = TAILQ_FIRST(&stcb->asoc.nets);
4713 /* we confirm any address we send an INIT to */
4714 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4715 (void)sctp_set_primary_addr(stcb, NULL, net);
4717 /* we confirm any address we send an INIT to */
4718 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4720 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4722 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4724 * special hook, if we are sending to link local it will not
4725 * show up in our private address count.
4727 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4731 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4732 /* This case should not happen */
4733 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4736 /* start the INIT timer */
4737 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4739 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4741 /* No memory, INIT timer will re-attempt. */
4742 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4745 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4747 /* Now lets put the chunk header in place */
4748 init = mtod(m, struct sctp_init_chunk *);
4749 /* now the chunk header */
4750 init->ch.chunk_type = SCTP_INITIATION;
4751 init->ch.chunk_flags = 0;
4752 /* fill in later from mbuf we build */
4753 init->ch.chunk_length = 0;
4754 /* place in my tag */
4755 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4756 /* set up some of the credits. */
4757 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4758 SCTP_MINIMAL_RWND));
4759 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4760 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4761 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4763 /* Adaptation layer indication parameter */
4764 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4765 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4766 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4767 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4768 ali->ph.param_length = htons(parameter_len);
4769 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4770 chunk_len += parameter_len;
4773 if (stcb->asoc.ecn_supported == 1) {
4774 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4775 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4776 ph->param_type = htons(SCTP_ECN_CAPABLE);
4777 ph->param_length = htons(parameter_len);
4778 chunk_len += parameter_len;
4780 /* PR-SCTP supported parameter */
4781 if (stcb->asoc.prsctp_supported == 1) {
4782 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4783 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4784 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4785 ph->param_length = htons(parameter_len);
4786 chunk_len += parameter_len;
4788 /* Add NAT friendly parameter. */
4789 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4790 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4791 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4792 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4793 ph->param_length = htons(parameter_len);
4794 chunk_len += parameter_len;
4796 /* And now tell the peer which extensions we support */
4798 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4799 if (stcb->asoc.prsctp_supported == 1) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4801 if (stcb->asoc.idata_supported) {
4802 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4805 if (stcb->asoc.auth_supported == 1) {
4806 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4808 if (stcb->asoc.asconf_supported == 1) {
4809 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4810 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4812 if (stcb->asoc.reconfig_supported == 1) {
4813 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4815 if (stcb->asoc.idata_supported) {
4816 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4818 if (stcb->asoc.nrsack_supported == 1) {
4819 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4821 if (stcb->asoc.pktdrop_supported == 1) {
4822 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4825 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4826 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4827 pr_supported->ph.param_length = htons(parameter_len);
4828 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4829 chunk_len += parameter_len;
4831 /* add authentication parameters */
4832 if (stcb->asoc.auth_supported) {
4833 /* attach RANDOM parameter, if available */
4834 if (stcb->asoc.authinfo.random != NULL) {
4835 struct sctp_auth_random *randp;
4837 if (padding_len > 0) {
4838 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4839 chunk_len += padding_len;
4842 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4843 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4844 /* random key already contains the header */
4845 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4846 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4847 chunk_len += parameter_len;
4849 /* add HMAC_ALGO parameter */
4850 if (stcb->asoc.local_hmacs != NULL) {
4851 struct sctp_auth_hmac_algo *hmacs;
4853 if (padding_len > 0) {
4854 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4855 chunk_len += padding_len;
4858 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4859 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4860 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4861 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4862 hmacs->ph.param_length = htons(parameter_len);
4863 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4864 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4865 chunk_len += parameter_len;
4867 /* add CHUNKS parameter */
4868 if (stcb->asoc.local_auth_chunks != NULL) {
4869 struct sctp_auth_chunk_list *chunks;
4871 if (padding_len > 0) {
4872 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4873 chunk_len += padding_len;
4876 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4877 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4878 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4879 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4880 chunks->ph.param_length = htons(parameter_len);
4881 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4882 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4883 chunk_len += parameter_len;
4886 /* now any cookie time extensions */
4887 if (stcb->asoc.cookie_preserve_req) {
4888 struct sctp_cookie_perserve_param *cookie_preserve;
4890 if (padding_len > 0) {
4891 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4892 chunk_len += padding_len;
4895 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4896 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4897 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4898 cookie_preserve->ph.param_length = htons(parameter_len);
4899 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4900 stcb->asoc.cookie_preserve_req = 0;
4901 chunk_len += parameter_len;
4903 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4906 if (padding_len > 0) {
4907 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4908 chunk_len += padding_len;
4911 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4912 if (stcb->asoc.scope.ipv4_addr_legal) {
4913 parameter_len += (uint16_t) sizeof(uint16_t);
4915 if (stcb->asoc.scope.ipv6_addr_legal) {
4916 parameter_len += (uint16_t) sizeof(uint16_t);
4918 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4919 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4920 sup_addr->ph.param_length = htons(parameter_len);
4922 if (stcb->asoc.scope.ipv4_addr_legal) {
4923 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4925 if (stcb->asoc.scope.ipv6_addr_legal) {
4926 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4928 padding_len = 4 - 2 * i;
4929 chunk_len += parameter_len;
4931 SCTP_BUF_LEN(m) = chunk_len;
4932 /* now the addresses */
4934 * To optimize this we could put the scoping stuff into a structure
4935 * and remove the individual uint8's from the assoc structure. Then
4936 * we could just sifa in the address within the stcb. But for now
4937 * this is a quick hack to get the address stuff teased apart.
4939 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4941 &padding_len, &chunk_len);
4943 init->ch.chunk_length = htons(chunk_len);
4944 if (padding_len > 0) {
4945 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4950 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4951 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4952 (struct sockaddr *)&net->ro._l_addr,
4953 m, 0, NULL, 0, 0, 0, 0,
4954 inp->sctp_lport, stcb->rport, htonl(0),
4958 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4959 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4960 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4964 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4965 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4968 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4969 * being equal to the beginning of the params i.e. (iphlen +
4970 * sizeof(struct sctp_init_msg) parse through the parameters to the
4971 * end of the mbuf verifying that all parameters are known.
4973 * For unknown parameters build and return a mbuf with
4974 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4975 * processing this chunk stop, and set *abort_processing to 1.
4977 * By having param_offset be pre-set to where parameters begin it is
4978 * hoped that this routine may be reused in the future by new
4981 struct sctp_paramhdr *phdr, params;
4983 struct mbuf *mat, *op_err;
4984 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4985 int at, limit, pad_needed;
4986 uint16_t ptype, plen, padded_size;
4989 *abort_processing = 0;
4992 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4995 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4996 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4997 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4998 ptype = ntohs(phdr->param_type);
4999 plen = ntohs(phdr->param_length);
5000 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5001 /* wacked parameter */
5002 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5005 limit -= SCTP_SIZE32(plen);
5007 * All parameters for all chunks that we know/understand are
5008 * listed here. We process them other places and make
5009 * appropriate stop actions per the upper bits. However this
5010 * is the generic routine processor's can call to get back
5011 * an operr.. to either incorporate (init-ack) or send.
5013 padded_size = SCTP_SIZE32(plen);
5015 /* Param's with variable size */
5016 case SCTP_HEARTBEAT_INFO:
5017 case SCTP_STATE_COOKIE:
5018 case SCTP_UNRECOG_PARAM:
5019 case SCTP_ERROR_CAUSE_IND:
5023 /* Param's with variable size within a range */
5024 case SCTP_CHUNK_LIST:
5025 case SCTP_SUPPORTED_CHUNK_EXT:
5026 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5027 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5032 case SCTP_SUPPORTED_ADDRTYPE:
5033 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5034 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5040 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5041 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5046 case SCTP_SET_PRIM_ADDR:
5047 case SCTP_DEL_IP_ADDRESS:
5048 case SCTP_ADD_IP_ADDRESS:
5049 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5050 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5056 /* Param's with a fixed size */
5057 case SCTP_IPV4_ADDRESS:
5058 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5059 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5064 case SCTP_IPV6_ADDRESS:
5065 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5066 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5071 case SCTP_COOKIE_PRESERVE:
5072 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5073 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5078 case SCTP_HAS_NAT_SUPPORT:
5081 case SCTP_PRSCTP_SUPPORTED:
5082 if (padded_size != sizeof(struct sctp_paramhdr)) {
5083 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5088 case SCTP_ECN_CAPABLE:
5089 if (padded_size != sizeof(struct sctp_paramhdr)) {
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5095 case SCTP_ULP_ADAPTATION:
5096 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5097 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5102 case SCTP_SUCCESS_REPORT:
5103 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5104 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5109 case SCTP_HOSTNAME_ADDRESS:
5111 /* We can NOT handle HOST NAME addresses!! */
5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5115 *abort_processing = 1;
5116 if (op_err == NULL) {
5117 /* Ok need to try to get a mbuf */
5119 l_len = SCTP_MIN_OVERHEAD;
5121 l_len = SCTP_MIN_V4_OVERHEAD;
5123 l_len += sizeof(struct sctp_chunkhdr);
5125 l_len += sizeof(struct sctp_paramhdr);
5126 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5128 SCTP_BUF_LEN(op_err) = 0;
5130 * pre-reserve space for ip
5131 * and sctp header and
5135 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5137 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5139 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5140 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5144 /* If we have space */
5145 struct sctp_paramhdr s;
5148 uint32_t cpthis = 0;
5150 pad_needed = 4 - (err_at % 4);
5151 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5152 err_at += pad_needed;
5154 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5155 s.param_length = htons(sizeof(s) + plen);
5156 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5157 err_at += sizeof(s);
5158 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5160 sctp_m_freem(op_err);
5162 * we are out of memory but
5163 * we still need to have a
5164 * look at what to do (the
5165 * system is in trouble
5170 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5177 * we do not recognize the parameter figure out what
5180 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5181 if ((ptype & 0x4000) == 0x4000) {
5182 /* Report bit is set?? */
5183 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5184 if (op_err == NULL) {
5187 /* Ok need to try to get an mbuf */
5189 l_len = SCTP_MIN_OVERHEAD;
5191 l_len = SCTP_MIN_V4_OVERHEAD;
5193 l_len += sizeof(struct sctp_chunkhdr);
5195 l_len += sizeof(struct sctp_paramhdr);
5196 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5198 SCTP_BUF_LEN(op_err) = 0;
5200 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5202 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5204 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5205 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5209 /* If we have space */
5210 struct sctp_paramhdr s;
5213 uint32_t cpthis = 0;
5215 pad_needed = 4 - (err_at % 4);
5216 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5217 err_at += pad_needed;
5219 s.param_type = htons(SCTP_UNRECOG_PARAM);
5220 s.param_length = htons(sizeof(s) + plen);
5221 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5222 err_at += sizeof(s);
5223 if (plen > sizeof(tempbuf)) {
5224 plen = sizeof(tempbuf);
5226 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5228 sctp_m_freem(op_err);
5230 * we are out of memory but
5231 * we still need to have a
5232 * look at what to do (the
5233 * system is in trouble
5237 goto more_processing;
5239 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5244 if ((ptype & 0x8000) == 0x0000) {
5245 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5248 /* skip this chunk and continue processing */
5249 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5250 at += SCTP_SIZE32(plen);
5255 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5259 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5260 *abort_processing = 1;
5261 if ((op_err == NULL) && phdr) {
5265 l_len = SCTP_MIN_OVERHEAD;
5267 l_len = SCTP_MIN_V4_OVERHEAD;
5269 l_len += sizeof(struct sctp_chunkhdr);
5270 l_len += (2 * sizeof(struct sctp_paramhdr));
5271 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5273 SCTP_BUF_LEN(op_err) = 0;
5275 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5277 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5279 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5280 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5283 if ((op_err) && phdr) {
5284 struct sctp_paramhdr s;
5287 uint32_t cpthis = 0;
5289 pad_needed = 4 - (err_at % 4);
5290 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5291 err_at += pad_needed;
5293 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5294 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5295 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5296 err_at += sizeof(s);
5297 /* Only copy back the p-hdr that caused the issue */
5298 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5304 sctp_are_there_new_addresses(struct sctp_association *asoc,
5305 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5308 * Given a INIT packet, look through the packet to verify that there
5309 * are NO new addresses. As we go through the parameters add reports
5310 * of any un-understood parameters that require an error. Also we
5311 * must return (1) to drop the packet if we see a un-understood
5312 * parameter that tells us to drop the chunk.
5314 struct sockaddr *sa_touse;
5315 struct sockaddr *sa;
5316 struct sctp_paramhdr *phdr, params;
5317 uint16_t ptype, plen;
5319 struct sctp_nets *net;
5323 struct sockaddr_in sin4, *sa4;
5327 struct sockaddr_in6 sin6, *sa6;
5332 memset(&sin4, 0, sizeof(sin4));
5333 sin4.sin_family = AF_INET;
5334 sin4.sin_len = sizeof(sin4);
5337 memset(&sin6, 0, sizeof(sin6));
5338 sin6.sin6_family = AF_INET6;
5339 sin6.sin6_len = sizeof(sin6);
5341 /* First what about the src address of the pkt ? */
5343 switch (src->sa_family) {
5346 if (asoc->scope.ipv4_addr_legal) {
5353 if (asoc->scope.ipv6_addr_legal) {
5364 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5365 sa = (struct sockaddr *)&net->ro._l_addr;
5366 if (sa->sa_family == src->sa_family) {
5368 if (sa->sa_family == AF_INET) {
5369 struct sockaddr_in *src4;
5371 sa4 = (struct sockaddr_in *)sa;
5372 src4 = (struct sockaddr_in *)src;
5373 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5380 if (sa->sa_family == AF_INET6) {
5381 struct sockaddr_in6 *src6;
5383 sa6 = (struct sockaddr_in6 *)sa;
5384 src6 = (struct sockaddr_in6 *)src;
5385 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5394 /* New address added! no need to look further. */
5398 /* Ok so far lets munge through the rest of the packet */
5399 offset += sizeof(struct sctp_init_chunk);
5400 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5403 ptype = ntohs(phdr->param_type);
5404 plen = ntohs(phdr->param_length);
5407 case SCTP_IPV4_ADDRESS:
5409 struct sctp_ipv4addr_param *p4, p4_buf;
5411 phdr = sctp_get_next_param(in_initpkt, offset,
5412 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5413 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5417 if (asoc->scope.ipv4_addr_legal) {
5418 p4 = (struct sctp_ipv4addr_param *)phdr;
5419 sin4.sin_addr.s_addr = p4->addr;
5420 sa_touse = (struct sockaddr *)&sin4;
5426 case SCTP_IPV6_ADDRESS:
5428 struct sctp_ipv6addr_param *p6, p6_buf;
5430 phdr = sctp_get_next_param(in_initpkt, offset,
5431 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5432 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5436 if (asoc->scope.ipv6_addr_legal) {
5437 p6 = (struct sctp_ipv6addr_param *)phdr;
5438 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5440 sa_touse = (struct sockaddr *)&sin6;
5450 /* ok, sa_touse points to one to check */
5452 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5453 sa = (struct sockaddr *)&net->ro._l_addr;
5454 if (sa->sa_family != sa_touse->sa_family) {
5458 if (sa->sa_family == AF_INET) {
5459 sa4 = (struct sockaddr_in *)sa;
5460 if (sa4->sin_addr.s_addr ==
5461 sin4.sin_addr.s_addr) {
5468 if (sa->sa_family == AF_INET6) {
5469 sa6 = (struct sockaddr_in6 *)sa;
5470 if (SCTP6_ARE_ADDR_EQUAL(
5479 /* New addr added! no need to look further */
5483 offset += SCTP_SIZE32(plen);
5484 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5490 * Given a MBUF chain that was sent into us containing an INIT. Build a
5491 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5492 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5493 * message (i.e. the struct sctp_init_msg).
5496 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5497 struct sctp_nets *src_net, struct mbuf *init_pkt,
5498 int iphlen, int offset,
5499 struct sockaddr *src, struct sockaddr *dst,
5500 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5501 uint8_t mflowtype, uint32_t mflowid,
5502 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5504 struct sctp_association *asoc;
5505 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5506 struct sctp_init_ack_chunk *initack;
5507 struct sctp_adaptation_layer_indication *ali;
5508 struct sctp_supported_chunk_types_param *pr_supported;
5509 struct sctp_paramhdr *ph;
5510 union sctp_sockstore *over_addr;
5511 struct sctp_scoping scp;
5514 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5515 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5516 struct sockaddr_in *sin;
5520 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5521 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5522 struct sockaddr_in6 *sin6;
5525 struct sockaddr *to;
5526 struct sctp_state_cookie stc;
5527 struct sctp_nets *net = NULL;
5528 uint8_t *signature = NULL;
5529 int cnt_inits_to = 0;
5530 uint16_t his_limit, i_want;
5532 int nat_friendly = 0;
5534 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5541 if ((asoc != NULL) &&
5542 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5543 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5545 * new addresses, out of here in non-cookie-wait
5548 * Send an ABORT, without the new address error cause.
5549 * This looks no different than if no listener was
5552 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5554 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5555 mflowtype, mflowid, inp->fibnum,
5559 if (src_net != NULL && (src_net->port != port)) {
5561 * change of remote encapsulation port, out of here
5562 * in non-cookie-wait states
5564 * Send an ABORT, without an specific error cause. This
5565 * looks no different than if no listener was
5568 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5569 "Remote encapsulation port changed");
5570 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5571 mflowtype, mflowid, inp->fibnum,
5577 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5578 (offset + sizeof(struct sctp_init_chunk)),
5579 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5582 if (op_err == NULL) {
5583 char msg[SCTP_DIAG_INFO_LEN];
5585 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5586 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5589 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5590 init_chk->init.initiate_tag, op_err,
5591 mflowtype, mflowid, inp->fibnum,
5595 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5597 /* No memory, INIT timer will re-attempt. */
5599 sctp_m_freem(op_err);
5602 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5606 * We might not overwrite the identification[] completely and on
5607 * some platforms time_entered will contain some padding. Therefore
5608 * zero out the cookie to avoid putting uninitialized memory on the
5611 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5613 /* the time I built cookie */
5614 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5616 /* populate any tie tags */
5618 /* unlock before tag selections */
5619 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5620 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5621 stc.cookie_life = asoc->cookie_life;
5622 net = asoc->primary_destination;
5624 stc.tie_tag_my_vtag = 0;
5625 stc.tie_tag_peer_vtag = 0;
5626 /* life I will award this cookie */
5627 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5630 /* copy in the ports for later check */
5631 stc.myport = sh->dest_port;
5632 stc.peerport = sh->src_port;
5635 * If we wanted to honor cookie life extensions, we would add to
5636 * stc.cookie_life. For now we should NOT honor any extension
5638 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5639 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5640 stc.ipv6_addr_legal = 1;
5641 if (SCTP_IPV6_V6ONLY(inp)) {
5642 stc.ipv4_addr_legal = 0;
5644 stc.ipv4_addr_legal = 1;
5647 stc.ipv6_addr_legal = 0;
5648 stc.ipv4_addr_legal = 1;
5653 switch (dst->sa_family) {
5657 /* lookup address */
5658 stc.address[0] = src4->sin_addr.s_addr;
5662 stc.addr_type = SCTP_IPV4_ADDRESS;
5663 /* local from address */
5664 stc.laddress[0] = dst4->sin_addr.s_addr;
5665 stc.laddress[1] = 0;
5666 stc.laddress[2] = 0;
5667 stc.laddress[3] = 0;
5668 stc.laddr_type = SCTP_IPV4_ADDRESS;
5669 /* scope_id is only for v6 */
5671 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5672 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5675 /* Must use the address in this case */
5676 if (sctp_is_address_on_local_host(src, vrf_id)) {
5677 stc.loopback_scope = 1;
5680 stc.local_scope = 0;
5688 stc.addr_type = SCTP_IPV6_ADDRESS;
5689 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5690 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5691 if (sctp_is_address_on_local_host(src, vrf_id)) {
5692 stc.loopback_scope = 1;
5693 stc.local_scope = 0;
5696 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5697 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5699 * If the new destination or source
5700 * is a LINK_LOCAL we must have
5701 * common both site and local scope.
5702 * Don't set local scope though
5703 * since we must depend on the
5704 * source to be added implicitly. We
5705 * cannot assure just because we
5706 * share one link that all links are
5709 stc.local_scope = 0;
5713 * we start counting for the private
5714 * address stuff at 1. since the
5715 * link local we source from won't
5716 * show up in our scoped count.
5720 * pull out the scope_id from
5723 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5724 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5726 * If the new destination or source
5727 * is SITE_LOCAL then we must have
5728 * site scope in common.
5732 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5733 stc.laddr_type = SCTP_IPV6_ADDRESS;
5743 /* set the scope per the existing tcb */
5746 struct sctp_nets *lnet;
5750 stc.loopback_scope = asoc->scope.loopback_scope;
5751 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5752 stc.site_scope = asoc->scope.site_scope;
5753 stc.local_scope = asoc->scope.local_scope;
5755 /* Why do we not consider IPv4 LL addresses? */
5756 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5757 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5758 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5760 * if we have a LL address, start
5768 /* use the net pointer */
5769 to = (struct sockaddr *)&net->ro._l_addr;
5770 switch (to->sa_family) {
5773 sin = (struct sockaddr_in *)to;
5774 stc.address[0] = sin->sin_addr.s_addr;
5778 stc.addr_type = SCTP_IPV4_ADDRESS;
5779 if (net->src_addr_selected == 0) {
5781 * strange case here, the INIT should have
5782 * did the selection.
5784 net->ro._s_addr = sctp_source_address_selection(inp,
5785 stcb, (sctp_route_t *) & net->ro,
5787 if (net->ro._s_addr == NULL)
5790 net->src_addr_selected = 1;
5793 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5794 stc.laddress[1] = 0;
5795 stc.laddress[2] = 0;
5796 stc.laddress[3] = 0;
5797 stc.laddr_type = SCTP_IPV4_ADDRESS;
5798 /* scope_id is only for v6 */
5804 sin6 = (struct sockaddr_in6 *)to;
5805 memcpy(&stc.address, &sin6->sin6_addr,
5806 sizeof(struct in6_addr));
5807 stc.addr_type = SCTP_IPV6_ADDRESS;
5808 stc.scope_id = sin6->sin6_scope_id;
5809 if (net->src_addr_selected == 0) {
5811 * strange case here, the INIT should have
5812 * done the selection.
5814 net->ro._s_addr = sctp_source_address_selection(inp,
5815 stcb, (sctp_route_t *) & net->ro,
5817 if (net->ro._s_addr == NULL)
5820 net->src_addr_selected = 1;
5822 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5823 sizeof(struct in6_addr));
5824 stc.laddr_type = SCTP_IPV6_ADDRESS;
5829 /* Now lets put the SCTP header in place */
5830 initack = mtod(m, struct sctp_init_ack_chunk *);
5831 /* Save it off for quick ref */
5832 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5834 memcpy(stc.identification, SCTP_VERSION_STRING,
5835 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5836 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5837 /* now the chunk header */
5838 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5839 initack->ch.chunk_flags = 0;
5840 /* fill in later from mbuf we build */
5841 initack->ch.chunk_length = 0;
5842 /* place in my tag */
5843 if ((asoc != NULL) &&
5844 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5845 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5846 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5847 /* re-use the v-tags and init-seq here */
5848 initack->init.initiate_tag = htonl(asoc->my_vtag);
5849 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5851 uint32_t vtag, itsn;
5853 if (hold_inp_lock) {
5854 SCTP_INP_INCR_REF(inp);
5855 SCTP_INP_RUNLOCK(inp);
5858 atomic_add_int(&asoc->refcnt, 1);
5859 SCTP_TCB_UNLOCK(stcb);
5861 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5862 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5864 * Got a duplicate vtag on some guy behind a
5865 * nat make sure we don't use it.
5869 initack->init.initiate_tag = htonl(vtag);
5870 /* get a TSN to use too */
5871 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5872 initack->init.initial_tsn = htonl(itsn);
5873 SCTP_TCB_LOCK(stcb);
5874 atomic_add_int(&asoc->refcnt, -1);
5876 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5877 initack->init.initiate_tag = htonl(vtag);
5878 /* get a TSN to use too */
5879 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5881 if (hold_inp_lock) {
5882 SCTP_INP_RLOCK(inp);
5883 SCTP_INP_DECR_REF(inp);
5886 /* save away my tag to */
5887 stc.my_vtag = initack->init.initiate_tag;
5889 /* set up some of the credits. */
5890 so = inp->sctp_socket;
5892 /* memory problem */
5896 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5898 /* set what I want */
5899 his_limit = ntohs(init_chk->init.num_inbound_streams);
5900 /* choose what I want */
5902 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5903 i_want = asoc->streamoutcnt;
5905 i_want = asoc->pre_open_streams;
5908 i_want = inp->sctp_ep.pre_open_stream_count;
5910 if (his_limit < i_want) {
5911 /* I Want more :< */
5912 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5914 /* I can have what I want :> */
5915 initack->init.num_outbound_streams = htons(i_want);
5917 /* tell him his limit. */
5918 initack->init.num_inbound_streams =
5919 htons(inp->sctp_ep.max_open_streams_intome);
5921 /* adaptation layer indication parameter */
5922 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5923 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5924 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5925 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5926 ali->ph.param_length = htons(parameter_len);
5927 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5928 chunk_len += parameter_len;
5931 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5932 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5933 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5934 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5935 ph->param_type = htons(SCTP_ECN_CAPABLE);
5936 ph->param_length = htons(parameter_len);
5937 chunk_len += parameter_len;
5939 /* PR-SCTP supported parameter */
5940 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5941 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5942 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5943 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5944 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5945 ph->param_length = htons(parameter_len);
5946 chunk_len += parameter_len;
5948 /* Add NAT friendly parameter */
5950 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5951 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5952 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5953 ph->param_length = htons(parameter_len);
5954 chunk_len += parameter_len;
5956 /* And now tell the peer which extensions we support */
5958 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5959 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5960 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5962 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5963 ((asoc == NULL) && (inp->idata_supported == 1))) {
5964 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5967 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5968 ((asoc == NULL) && (inp->auth_supported == 1))) {
5969 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5971 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5972 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5973 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5974 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5976 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5977 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5978 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5980 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5981 ((asoc == NULL) && (inp->idata_supported == 1))) {
5982 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5984 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5985 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5986 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5988 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5989 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5990 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5993 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5994 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5995 pr_supported->ph.param_length = htons(parameter_len);
5996 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5997 chunk_len += parameter_len;
5999 /* add authentication parameters */
6000 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
6001 ((asoc == NULL) && (inp->auth_supported == 1))) {
6002 struct sctp_auth_random *randp;
6003 struct sctp_auth_hmac_algo *hmacs;
6004 struct sctp_auth_chunk_list *chunks;
6006 if (padding_len > 0) {
6007 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6008 chunk_len += padding_len;
6011 /* generate and add RANDOM parameter */
6012 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6013 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
6014 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6015 randp->ph.param_type = htons(SCTP_RANDOM);
6016 randp->ph.param_length = htons(parameter_len);
6017 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6018 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6019 chunk_len += parameter_len;
6021 if (padding_len > 0) {
6022 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6023 chunk_len += padding_len;
6026 /* add HMAC_ALGO parameter */
6027 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6028 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
6029 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6030 (uint8_t *) hmacs->hmac_ids);
6031 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6032 hmacs->ph.param_length = htons(parameter_len);
6033 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6034 chunk_len += parameter_len;
6036 if (padding_len > 0) {
6037 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6038 chunk_len += padding_len;
6041 /* add CHUNKS parameter */
6042 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6043 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6044 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6045 chunks->chunk_types);
6046 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6047 chunks->ph.param_length = htons(parameter_len);
6048 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6049 chunk_len += parameter_len;
6051 SCTP_BUF_LEN(m) = chunk_len;
6053 /* now the addresses */
6055 * To optimize this we could put the scoping stuff into a structure
6056 * and remove the individual uint8's from the stc structure. Then we
6057 * could just sifa in the address within the stc.. but for now this
6058 * is a quick hack to get the address stuff teased apart.
6060 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6061 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6062 scp.loopback_scope = stc.loopback_scope;
6063 scp.ipv4_local_scope = stc.ipv4_scope;
6064 scp.local_scope = stc.local_scope;
6065 scp.site_scope = stc.site_scope;
6066 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6068 &padding_len, &chunk_len);
6069 /* padding_len can only be positive, if no addresses have been added */
6070 if (padding_len > 0) {
6071 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6072 chunk_len += padding_len;
6073 SCTP_BUF_LEN(m) += padding_len;
6076 /* tack on the operational error if present */
6079 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6080 parameter_len += SCTP_BUF_LEN(m_tmp);
6082 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6083 SCTP_BUF_NEXT(m_last) = op_err;
6084 while (SCTP_BUF_NEXT(m_last) != NULL) {
6085 m_last = SCTP_BUF_NEXT(m_last);
6087 chunk_len += parameter_len;
6089 if (padding_len > 0) {
6090 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6091 if (m_last == NULL) {
6092 /* Houston we have a problem, no space */
6096 chunk_len += padding_len;
6099 /* Now we must build a cookie */
6100 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6101 if (m_cookie == NULL) {
6102 /* memory problem */
6106 /* Now append the cookie to the end and update the space/size */
6107 SCTP_BUF_NEXT(m_last) = m_cookie;
6109 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6110 parameter_len += SCTP_BUF_LEN(m_tmp);
6111 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6115 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6116 chunk_len += parameter_len;
6119 * Place in the size, but we don't include the last pad (if any) in
6122 initack->ch.chunk_length = htons(chunk_len);
6125 * Time to sign the cookie, we don't sign over the cookie signature
6126 * though thus we set trailer.
6128 (void)sctp_hmac_m(SCTP_HMAC,
6129 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6130 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6131 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6133 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6134 * here since the timer will drive a retranmission.
6136 if (padding_len > 0) {
6137 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6142 if (stc.loopback_scope) {
6143 over_addr = (union sctp_sockstore *)dst;
6148 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6150 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6153 SCTP_SO_NOT_LOCKED);
6154 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6159 sctp_prune_prsctp(struct sctp_tcb *stcb,
6160 struct sctp_association *asoc,
6161 struct sctp_sndrcvinfo *srcv,
6165 struct sctp_tmit_chunk *chk, *nchk;
6167 SCTP_TCB_LOCK_ASSERT(stcb);
6168 if ((asoc->prsctp_supported) &&
6169 (asoc->sent_queue_cnt_removeable > 0)) {
6170 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6172 * Look for chunks marked with the PR_SCTP flag AND
6173 * the buffer space flag. If the one being sent is
6174 * equal or greater priority then purge the old one
6175 * and free some space.
6177 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6179 * This one is PR-SCTP AND buffer space
6182 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6184 * Lower numbers equates to higher
6185 * priority so if the one we are
6186 * looking at has a larger or equal
6187 * priority we want to drop the data
6188 * and NOT retransmit it.
6192 * We release the book_size
6193 * if the mbuf is here
6198 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6202 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6205 freed_spc += ret_spc;
6206 if (freed_spc >= dataout) {
6209 } /* if chunk was present */
6210 } /* if of sufficient priority */
6211 } /* if chunk has enabled */
6212 } /* tailqforeach */
6214 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6215 /* Here we must move to the sent queue and mark */
6216 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6217 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6220 * We release the book_size
6221 * if the mbuf is here
6225 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6228 freed_spc += ret_spc;
6229 if (freed_spc >= dataout) {
6232 } /* end if chk->data */
6233 } /* end if right class */
6234 } /* end if chk pr-sctp */
6235 } /* tailqforeachsafe (chk) */
6236 } /* if enabled in asoc */
6240 sctp_get_frag_point(struct sctp_tcb *stcb,
6241 struct sctp_association *asoc)
6246 * For endpoints that have both v6 and v4 addresses we must reserve
6247 * room for the ipv6 header, for those that are only dealing with V4
6248 * we use a larger frag point.
6250 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6251 ovh = SCTP_MIN_OVERHEAD;
6253 ovh = SCTP_MIN_V4_OVERHEAD;
6255 if (stcb->asoc.idata_supported) {
6256 ovh += sizeof(struct sctp_idata_chunk);
6258 ovh += sizeof(struct sctp_data_chunk);
6260 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6261 siz = asoc->smallest_mtu - ovh;
6263 siz = (stcb->asoc.sctp_frag_point - ovh);
6265 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6267 /* A data chunk MUST fit in a cluster */
6268 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6271 /* adjust for an AUTH chunk if DATA requires auth */
6272 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6273 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6276 /* make it an even word boundary please */
6283 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6286 * We assume that the user wants PR_SCTP_TTL if the user provides a
6287 * positive lifetime but does not specify any PR_SCTP policy.
6289 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6290 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6291 } else if (sp->timetolive > 0) {
6292 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6293 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6297 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6298 case CHUNK_FLAGS_PR_SCTP_BUF:
6300 * Time to live is a priority stored in tv_sec when doing
6301 * the buffer drop thing.
6303 sp->ts.tv_sec = sp->timetolive;
6306 case CHUNK_FLAGS_PR_SCTP_TTL:
6310 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6311 tv.tv_sec = sp->timetolive / 1000;
6312 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6314 * TODO sctp_constants.h needs alternative time
6315 * macros when _KERNEL is undefined.
6317 timevaladd(&sp->ts, &tv);
6320 case CHUNK_FLAGS_PR_SCTP_RTX:
6322 * Time to live is a the number or retransmissions stored in
6325 sp->ts.tv_sec = sp->timetolive;
6329 SCTPDBG(SCTP_DEBUG_USRREQ1,
6330 "Unknown PR_SCTP policy %u.\n",
6331 PR_SCTP_POLICY(sp->sinfo_flags));
6337 sctp_msg_append(struct sctp_tcb *stcb,
6338 struct sctp_nets *net,
6340 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6344 struct sctp_stream_queue_pending *sp = NULL;
6345 struct sctp_stream_out *strm;
6348 * Given an mbuf chain, put it into the association send queue and
6349 * place it on the wheel
6351 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6352 /* Invalid stream number */
6353 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6357 if ((stcb->asoc.stream_locked) &&
6358 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6359 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6363 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6364 /* Now can we send this? */
6365 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6366 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6367 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6368 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6369 /* got data while shutting down */
6370 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6374 sctp_alloc_a_strmoq(stcb, sp);
6376 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6380 sp->sinfo_flags = srcv->sinfo_flags;
6381 sp->timetolive = srcv->sinfo_timetolive;
6382 sp->ppid = srcv->sinfo_ppid;
6383 sp->context = srcv->sinfo_context;
6385 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6387 atomic_add_int(&sp->net->ref_count, 1);
6391 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6392 sp->stream = srcv->sinfo_stream;
6393 sp->msg_is_complete = 1;
6394 sp->sender_all_done = 1;
6397 sp->tail_mbuf = NULL;
6398 sctp_set_prsctp_policy(sp);
6400 * We could in theory (for sendall) sifa the length in, but we would
6401 * still have to hunt through the chain since we need to setup the
6405 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6406 if (SCTP_BUF_NEXT(at) == NULL)
6408 sp->length += SCTP_BUF_LEN(at);
6410 if (srcv->sinfo_keynumber_valid) {
6411 sp->auth_keyid = srcv->sinfo_keynumber;
6413 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6415 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6416 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6417 sp->holds_key_ref = 1;
6419 if (hold_stcb_lock == 0) {
6420 SCTP_TCB_SEND_LOCK(stcb);
6422 sctp_snd_sb_alloc(stcb, sp->length);
6423 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6424 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6425 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6427 if (hold_stcb_lock == 0) {
6428 SCTP_TCB_SEND_UNLOCK(stcb);
6438 static struct mbuf *
6439 sctp_copy_mbufchain(struct mbuf *clonechain,
6440 struct mbuf *outchain,
6441 struct mbuf **endofchain,
6444 uint8_t copy_by_ref)
6447 struct mbuf *appendchain;
6451 if (endofchain == NULL) {
6455 sctp_m_freem(outchain);
6458 if (can_take_mbuf) {
6459 appendchain = clonechain;
6462 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6464 /* Its not in a cluster */
6465 if (*endofchain == NULL) {
6466 /* lets get a mbuf cluster */
6467 if (outchain == NULL) {
6468 /* This is the general case */
6470 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6471 if (outchain == NULL) {
6474 SCTP_BUF_LEN(outchain) = 0;
6475 *endofchain = outchain;
6476 /* get the prepend space */
6477 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6480 * We really should not get a NULL
6486 if (SCTP_BUF_NEXT(m) == NULL) {
6490 m = SCTP_BUF_NEXT(m);
6493 if (*endofchain == NULL) {
6495 * huh, TSNH XXX maybe we
6498 sctp_m_freem(outchain);
6502 /* get the new end of length */
6503 len = (int)M_TRAILINGSPACE(*endofchain);
6505 /* how much is left at the end? */
6506 len = (int)M_TRAILINGSPACE(*endofchain);
6508 /* Find the end of the data, for appending */
6509 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6511 /* Now lets copy it out */
6512 if (len >= sizeofcpy) {
6513 /* It all fits, copy it in */
6514 m_copydata(clonechain, 0, sizeofcpy, cp);
6515 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6517 /* fill up the end of the chain */
6519 m_copydata(clonechain, 0, len, cp);
6520 SCTP_BUF_LEN((*endofchain)) += len;
6521 /* now we need another one */
6524 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6529 SCTP_BUF_NEXT((*endofchain)) = m;
6531 cp = mtod((*endofchain), caddr_t);
6532 m_copydata(clonechain, len, sizeofcpy, cp);
6533 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6537 /* copy the old fashion way */
6538 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6539 #ifdef SCTP_MBUF_LOGGING
6540 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6541 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6546 if (appendchain == NULL) {
6549 sctp_m_freem(outchain);
6553 /* tack on to the end */
6554 if (*endofchain != NULL) {
6555 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6559 if (SCTP_BUF_NEXT(m) == NULL) {
6560 SCTP_BUF_NEXT(m) = appendchain;
6563 m = SCTP_BUF_NEXT(m);
6567 * save off the end and update the end-chain position
6571 if (SCTP_BUF_NEXT(m) == NULL) {
6575 m = SCTP_BUF_NEXT(m);
6579 /* save off the end and update the end-chain position */
6582 if (SCTP_BUF_NEXT(m) == NULL) {
6586 m = SCTP_BUF_NEXT(m);
6588 return (appendchain);
6593 sctp_med_chunk_output(struct sctp_inpcb *inp,
6594 struct sctp_tcb *stcb,
6595 struct sctp_association *asoc,
6598 int control_only, int from_where,
6599 struct timeval *now, int *now_filled, int frag_point, int so_locked
6600 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6606 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6607 uint32_t val SCTP_UNUSED)
6609 struct sctp_copy_all *ca;
6612 int added_control = 0;
6613 int un_sent, do_chunk_output = 1;
6614 struct sctp_association *asoc;
6615 struct sctp_nets *net;
6617 ca = (struct sctp_copy_all *)ptr;
6618 if (ca->m == NULL) {
6621 if (ca->inp != inp) {
6625 if (ca->sndlen > 0) {
6626 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6628 /* can't copy so we are done */
6632 #ifdef SCTP_MBUF_LOGGING
6633 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6634 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6640 SCTP_TCB_LOCK_ASSERT(stcb);
6641 if (stcb->asoc.alternate) {
6642 net = stcb->asoc.alternate;
6644 net = stcb->asoc.primary_destination;
6646 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6647 /* Abort this assoc with m as the user defined reason */
6649 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6651 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6652 0, M_NOWAIT, 1, MT_DATA);
6653 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6656 struct sctp_paramhdr *ph;
6658 ph = mtod(m, struct sctp_paramhdr *);
6659 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6660 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + ca->sndlen));
6663 * We add one here to keep the assoc from dis-appearing on
6666 atomic_add_int(&stcb->asoc.refcnt, 1);
6667 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6669 * sctp_abort_an_association calls sctp_free_asoc() free
6670 * association will NOT free it since we incremented the
6671 * refcnt .. we do this to prevent it being freed and things
6672 * getting tricky since we could end up (from free_asoc)
6673 * calling inpcb_free which would get a recursive lock call
6674 * to the iterator lock.. But as a consequence of that the
6675 * stcb will return to us un-locked.. since free_asoc
6676 * returns with either no TCB or the TCB unlocked, we must
6677 * relock.. to unlock in the iterator timer :-0
6679 SCTP_TCB_LOCK(stcb);
6680 atomic_add_int(&stcb->asoc.refcnt, -1);
6681 goto no_chunk_output;
6684 ret = sctp_msg_append(stcb, net, m,
6688 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6689 /* shutdown this assoc */
6690 if (TAILQ_EMPTY(&asoc->send_queue) &&
6691 TAILQ_EMPTY(&asoc->sent_queue) &&
6692 sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED) == 0) {
6693 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6697 * there is nothing queued to send, so I'm
6700 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6701 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6702 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6704 * only send SHUTDOWN the first time
6707 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6708 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6710 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6711 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6712 sctp_stop_timers_for_shutdown(stcb);
6713 sctp_send_shutdown(stcb, net);
6714 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6716 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6717 asoc->primary_destination);
6719 do_chunk_output = 0;
6723 * we still got (or just got) data to send,
6724 * so set SHUTDOWN_PENDING
6727 * XXX sockets draft says that SCTP_EOF
6728 * should be sent with no data. currently,
6729 * we will allow user data to be sent first
6730 * and move to SHUTDOWN-PENDING
6732 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6733 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6734 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6735 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
6736 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6738 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6739 if (TAILQ_EMPTY(&asoc->send_queue) &&
6740 TAILQ_EMPTY(&asoc->sent_queue) &&
6741 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6742 struct mbuf *op_err;
6743 char msg[SCTP_DIAG_INFO_LEN];
6746 snprintf(msg, sizeof(msg),
6747 "%s:%d at %s", __FILE__, __LINE__, __func__);
6748 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6750 atomic_add_int(&stcb->asoc.refcnt, 1);
6751 sctp_abort_an_association(stcb->sctp_ep, stcb,
6752 op_err, SCTP_SO_NOT_LOCKED);
6753 atomic_add_int(&stcb->asoc.refcnt, -1);
6754 goto no_chunk_output;
6756 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6757 asoc->primary_destination);
6763 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6764 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6766 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6767 (stcb->asoc.total_flight > 0) &&
6768 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6769 do_chunk_output = 0;
6771 if (do_chunk_output)
6772 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6773 else if (added_control) {
6774 int num_out, reason, now_filled = 0;
6778 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6779 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6780 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6791 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6793 struct sctp_copy_all *ca;
6795 ca = (struct sctp_copy_all *)ptr;
6797 * Do a notify here? Kacheong suggests that the notify be done at
6798 * the send time.. so you would push up a notification if any send
6799 * failed. Don't know if this is feasible since the only failures we
6800 * have is "memory" related and if you cannot get an mbuf to send
6801 * the data you surely can't get an mbuf to send up to notify the
6802 * user you can't send the data :->
6805 /* now free everything */
6806 sctp_m_freem(ca->m);
6807 SCTP_FREE(ca, SCTP_M_COPYAL);
6810 static struct mbuf *
6811 sctp_copy_out_all(struct uio *uio, int len)
6813 struct mbuf *ret, *at;
6814 int left, willcpy, cancpy, error;
6816 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6822 SCTP_BUF_LEN(ret) = 0;
6823 /* save space for the data chunk header */
6824 cancpy = (int)M_TRAILINGSPACE(ret);
6825 willcpy = min(cancpy, left);
6828 /* Align data to the end */
6829 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6835 SCTP_BUF_LEN(at) = willcpy;
6836 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6839 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6840 if (SCTP_BUF_NEXT(at) == NULL) {
6843 at = SCTP_BUF_NEXT(at);
6844 SCTP_BUF_LEN(at) = 0;
6845 cancpy = (int)M_TRAILINGSPACE(at);
6846 willcpy = min(cancpy, left);
6853 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6854 struct sctp_sndrcvinfo *srcv)
6857 struct sctp_copy_all *ca;
6859 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6866 memset(ca, 0, sizeof(struct sctp_copy_all));
6870 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6873 * take off the sendall flag, it would be bad if we failed to do
6876 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6877 /* get length and mbuf chain */
6879 ca->sndlen = (int)uio->uio_resid;
6880 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6881 if (ca->m == NULL) {
6882 SCTP_FREE(ca, SCTP_M_COPYAL);
6883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6887 /* Gather the length of the send */
6891 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6892 ca->sndlen += SCTP_BUF_LEN(mat);
6895 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6896 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6897 SCTP_ASOC_ANY_STATE,
6899 sctp_sendall_completes, inp, 1);
6901 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6902 SCTP_FREE(ca, SCTP_M_COPYAL);
6903 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6911 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6913 struct sctp_tmit_chunk *chk, *nchk;
6915 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6916 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6917 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6919 sctp_m_freem(chk->data);
6922 asoc->ctrl_queue_cnt--;
6923 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6929 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6931 struct sctp_association *asoc;
6932 struct sctp_tmit_chunk *chk, *nchk;
6933 struct sctp_asconf_chunk *acp;
6936 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6937 /* find SCTP_ASCONF chunk in queue */
6938 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6940 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6941 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6946 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6948 sctp_m_freem(chk->data);
6951 asoc->ctrl_queue_cnt--;
6952 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6959 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6960 struct sctp_association *asoc,
6961 struct sctp_tmit_chunk **data_list,
6963 struct sctp_nets *net)
6966 struct sctp_tmit_chunk *tp1;
6968 for (i = 0; i < bundle_at; i++) {
6969 /* off of the send queue */
6970 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6971 asoc->send_queue_cnt--;
6974 * Any chunk NOT 0 you zap the time chunk 0 gets
6975 * zapped or set based on if a RTO measurment is
6978 data_list[i]->do_rtt = 0;
6981 data_list[i]->sent_rcv_time = net->last_sent_time;
6982 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6983 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6984 if (data_list[i]->whoTo == NULL) {
6985 data_list[i]->whoTo = net;
6986 atomic_add_int(&net->ref_count, 1);
6988 /* on to the sent queue */
6989 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6990 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6991 struct sctp_tmit_chunk *tpp;
6993 /* need to move back */
6995 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6997 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7001 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
7004 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7006 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7011 /* This does not lower until the cum-ack passes it */
7012 asoc->sent_queue_cnt++;
7013 if ((asoc->peers_rwnd <= 0) &&
7014 (asoc->total_flight == 0) &&
7016 /* Mark the chunk as being a window probe */
7017 SCTP_STAT_INCR(sctps_windowprobed);
7019 #ifdef SCTP_AUDITING_ENABLED
7020 sctp_audit_log(0xC2, 3);
7022 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7023 data_list[i]->snd_count = 1;
7024 data_list[i]->rec.data.chunk_was_revoked = 0;
7025 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7026 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7027 data_list[i]->whoTo->flight_size,
7028 data_list[i]->book_size,
7029 (uint32_t) (uintptr_t) data_list[i]->whoTo,
7030 data_list[i]->rec.data.TSN_seq);
7032 sctp_flight_size_increase(data_list[i]);
7033 sctp_total_flight_increase(stcb, data_list[i]);
7034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7035 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7036 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7038 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7039 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7040 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7041 /* SWS sender side engages */
7042 asoc->peers_rwnd = 0;
7045 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7046 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7051 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7052 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7057 struct sctp_tmit_chunk *chk, *nchk;
7059 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7060 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7061 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7062 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7063 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7064 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7065 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7066 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7067 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7068 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7069 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7070 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7071 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7072 /* Stray chunks must be cleaned up */
7074 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7076 sctp_m_freem(chk->data);
7079 asoc->ctrl_queue_cnt--;
7080 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7081 asoc->fwd_tsn_cnt--;
7082 sctp_free_a_chunk(stcb, chk, so_locked);
7083 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7084 /* special handling, we must look into the param */
7085 if (chk != asoc->str_reset) {
7086 goto clean_up_anyway;
7094 sctp_can_we_split_this(struct sctp_tcb *stcb,
7096 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7099 * Make a decision on if I should split a msg into multiple parts.
7100 * This is only asked of incomplete messages.
7104 * If we are doing EEOR we need to always send it if its the
7105 * entire thing, since it might be all the guy is putting in
7108 if (goal_mtu >= length) {
7110 * If we have data outstanding,
7111 * we get another chance when the sack
7112 * arrives to transmit - wait for more data
7114 if (stcb->asoc.total_flight == 0) {
7116 * If nothing is in flight, we zero the
7124 /* You can fill the rest */
7129 * For those strange folk that make the send buffer
7130 * smaller than our fragmentation point, we can't
7131 * get a full msg in so we have to allow splitting.
7133 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7136 if ((length <= goal_mtu) ||
7137 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7138 /* Sub-optimial residual don't split in non-eeor mode. */
7142 * If we reach here length is larger than the goal_mtu. Do we wish
7143 * to split it for the sake of packet putting together?
7145 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7146 /* Its ok to split it */
7147 return (min(goal_mtu, frag_point));
7149 /* Nope, can't split */
7155 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7156 struct sctp_stream_out *strq,
7158 uint32_t frag_point,
7163 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7168 /* Move from the stream to the send_queue keeping track of the total */
7169 struct sctp_association *asoc;
7170 struct sctp_stream_queue_pending *sp;
7171 struct sctp_tmit_chunk *chk;
7172 struct sctp_data_chunk *dchkh = NULL;
7173 struct sctp_idata_chunk *ndchkh = NULL;
7174 uint32_t to_move, length;
7176 uint8_t rcv_flags = 0;
7178 uint8_t send_lock_up = 0;
7180 SCTP_TCB_LOCK_ASSERT(stcb);
7183 /* sa_ignore FREED_MEMORY */
7184 sp = TAILQ_FIRST(&strq->outqueue);
7186 if (send_lock_up == 0) {
7187 SCTP_TCB_SEND_LOCK(stcb);
7190 sp = TAILQ_FIRST(&strq->outqueue);
7194 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7195 (stcb->asoc.idata_supported == 0) &&
7196 (strq->last_msg_incomplete)) {
7197 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7199 strq->last_msg_incomplete);
7200 strq->last_msg_incomplete = 0;
7204 SCTP_TCB_SEND_UNLOCK(stcb);
7209 if ((sp->msg_is_complete) && (sp->length == 0)) {
7210 if (sp->sender_all_done) {
7212 * We are doing differed cleanup. Last time through
7213 * when we took all the data the sender_all_done was
7216 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7217 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7218 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7219 sp->sender_all_done,
7221 sp->msg_is_complete,
7225 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7226 SCTP_TCB_SEND_LOCK(stcb);
7229 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7230 TAILQ_REMOVE(&strq->outqueue, sp, next);
7231 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7232 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7233 (strq->chunks_on_queues == 0) &&
7234 TAILQ_EMPTY(&strq->outqueue)) {
7235 stcb->asoc.trigger_reset = 1;
7238 sctp_free_remote_addr(sp->net);
7242 sctp_m_freem(sp->data);
7245 sctp_free_a_strmoq(stcb, sp, so_locked);
7246 /* we can't be locked to it */
7248 SCTP_TCB_SEND_UNLOCK(stcb);
7251 /* back to get the next msg */
7255 * sender just finished this but still holds a
7263 /* is there some to get */
7264 if (sp->length == 0) {
7269 } else if (sp->discard_rest) {
7270 if (send_lock_up == 0) {
7271 SCTP_TCB_SEND_LOCK(stcb);
7274 /* Whack down the size */
7275 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7276 if ((stcb->sctp_socket != NULL) &&
7277 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7278 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7279 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7282 sctp_m_freem(sp->data);
7284 sp->tail_mbuf = NULL;
7293 some_taken = sp->some_taken;
7295 length = sp->length;
7296 if (sp->msg_is_complete) {
7297 /* The message is complete */
7298 to_move = min(length, frag_point);
7299 if (to_move == length) {
7300 /* All of it fits in the MTU */
7301 if (sp->some_taken) {
7302 rcv_flags |= SCTP_DATA_LAST_FRAG;
7304 rcv_flags |= SCTP_DATA_NOT_FRAG;
7306 sp->put_last_out = 1;
7307 if (sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
7308 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7311 /* Not all of it fits, we fragment */
7312 if (sp->some_taken == 0) {
7313 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7318 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7321 * We use a snapshot of length in case it
7322 * is expanding during the compare.
7327 if (to_move >= llen) {
7329 if (send_lock_up == 0) {
7331 * We are taking all of an incomplete msg
7332 * thus we need a send lock.
7334 SCTP_TCB_SEND_LOCK(stcb);
7336 if (sp->msg_is_complete) {
7338 * the sender finished the
7345 if (sp->some_taken == 0) {
7346 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7350 /* Nothing to take. */
7357 /* If we reach here, we can copy out a chunk */
7358 sctp_alloc_a_chunk(stcb, chk);
7360 /* No chunk memory */
7366 * Setup for unordered if needed by looking at the user sent info
7369 if (sp->sinfo_flags & SCTP_UNORDERED) {
7370 rcv_flags |= SCTP_DATA_UNORDERED;
7372 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
7373 (sp->sinfo_flags & SCTP_EOF) == SCTP_EOF) {
7374 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7376 /* clear out the chunk before setting up */
7377 memset(chk, 0, sizeof(*chk));
7378 chk->rec.data.rcv_flags = rcv_flags;
7380 if (to_move >= length) {
7381 /* we think we can steal the whole thing */
7382 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7383 SCTP_TCB_SEND_LOCK(stcb);
7386 if (to_move < sp->length) {
7387 /* bail, it changed */
7390 chk->data = sp->data;
7391 chk->last_mbuf = sp->tail_mbuf;
7392 /* register the stealing */
7393 sp->data = sp->tail_mbuf = NULL;
7398 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7399 chk->last_mbuf = NULL;
7400 if (chk->data == NULL) {
7401 sp->some_taken = some_taken;
7402 sctp_free_a_chunk(stcb, chk, so_locked);
7407 #ifdef SCTP_MBUF_LOGGING
7408 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7409 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7412 /* Pull off the data */
7413 m_adj(sp->data, to_move);
7414 /* Now lets work our way down and compact it */
7416 while (m && (SCTP_BUF_LEN(m) == 0)) {
7417 sp->data = SCTP_BUF_NEXT(m);
7418 SCTP_BUF_NEXT(m) = NULL;
7419 if (sp->tail_mbuf == m) {
7421 * Freeing tail? TSNH since
7422 * we supposedly were taking less
7423 * than the sp->length.
7426 panic("Huh, freing tail? - TSNH");
7428 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7429 sp->tail_mbuf = sp->data = NULL;
7438 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7439 chk->copy_by_ref = 1;
7441 chk->copy_by_ref = 0;
7444 * get last_mbuf and counts of mb usage This is ugly but hopefully
7445 * its only one mbuf.
7447 if (chk->last_mbuf == NULL) {
7448 chk->last_mbuf = chk->data;
7449 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7450 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7453 if (to_move > length) {
7454 /*- This should not happen either
7455 * since we always lower to_move to the size
7456 * of sp->length if its larger.
7459 panic("Huh, how can to_move be larger?");
7461 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7465 atomic_subtract_int(&sp->length, to_move);
7467 if (stcb->asoc.idata_supported == 0) {
7468 leading = sizeof(struct sctp_data_chunk);
7470 leading = sizeof(struct sctp_idata_chunk);
7472 if (M_LEADINGSPACE(chk->data) < leading) {
7473 /* Not enough room for a chunk header, get some */
7476 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7479 * we're in trouble here. _PREPEND below will free
7480 * all the data if there is no leading space, so we
7481 * must put the data back and restore.
7483 if (send_lock_up == 0) {
7484 SCTP_TCB_SEND_LOCK(stcb);
7487 if (sp->data == NULL) {
7488 /* unsteal the data */
7489 sp->data = chk->data;
7490 sp->tail_mbuf = chk->last_mbuf;
7494 /* reassemble the data */
7496 sp->data = chk->data;
7497 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7499 sp->some_taken = some_taken;
7500 atomic_add_int(&sp->length, to_move);
7503 sctp_free_a_chunk(stcb, chk, so_locked);
7507 SCTP_BUF_LEN(m) = 0;
7508 SCTP_BUF_NEXT(m) = chk->data;
7510 M_ALIGN(chk->data, 4);
7513 if (stcb->asoc.idata_supported == 0) {
7514 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7516 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
7518 if (chk->data == NULL) {
7519 /* HELP, TSNH since we assured it would not above? */
7521 panic("prepend failes HELP?");
7523 SCTP_PRINTF("prepend fails HELP?\n");
7524 sctp_free_a_chunk(stcb, chk, so_locked);
7530 if (stcb->asoc.idata_supported == 0) {
7531 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7532 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_data_chunk));
7534 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
7535 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_idata_chunk));
7537 chk->book_size_scale = 0;
7538 chk->sent = SCTP_DATAGRAM_UNSENT;
7541 chk->asoc = &stcb->asoc;
7542 chk->pad_inplace = 0;
7543 chk->no_fr_allowed = 0;
7544 if (stcb->asoc.idata_supported == 0) {
7545 if (rcv_flags & SCTP_DATA_UNORDERED) {
7546 /* Just use 0. The receiver ignores the values. */
7547 chk->rec.data.stream_seq = 0;
7549 chk->rec.data.stream_seq = strq->next_mid_ordered;
7550 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7551 strq->next_mid_ordered++;
7555 if (rcv_flags & SCTP_DATA_UNORDERED) {
7556 chk->rec.data.stream_seq = strq->next_mid_unordered;
7557 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7558 strq->next_mid_unordered++;
7561 chk->rec.data.stream_seq = strq->next_mid_ordered;
7562 if (rcv_flags & SCTP_DATA_LAST_FRAG) {
7563 strq->next_mid_ordered++;
7567 chk->rec.data.stream_number = sp->stream;
7568 chk->rec.data.payloadtype = sp->ppid;
7569 chk->rec.data.context = sp->context;
7570 chk->rec.data.doing_fast_retransmit = 0;
7572 chk->rec.data.timetodrop = sp->ts;
7573 chk->flags = sp->act_flags;
7576 chk->whoTo = sp->net;
7577 atomic_add_int(&chk->whoTo->ref_count, 1);
7581 if (sp->holds_key_ref) {
7582 chk->auth_keyid = sp->auth_keyid;
7583 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7584 chk->holds_key_ref = 1;
7586 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7587 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7588 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7589 (uint32_t) (uintptr_t) stcb, sp->length,
7590 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7591 chk->rec.data.TSN_seq);
7593 if (stcb->asoc.idata_supported == 0) {
7594 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7596 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7599 * Put the rest of the things in place now. Size was done earlier in
7600 * previous loop prior to padding.
7603 #ifdef SCTP_ASOCLOG_OF_TSNS
7604 SCTP_TCB_LOCK_ASSERT(stcb);
7605 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7606 asoc->tsn_out_at = 0;
7607 asoc->tsn_out_wrapped = 1;
7609 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7610 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7611 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7612 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7613 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7614 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7615 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7616 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7619 if (stcb->asoc.idata_supported == 0) {
7620 dchkh->ch.chunk_type = SCTP_DATA;
7621 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7622 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7623 dchkh->dp.stream_id = htons((strq->stream_no & 0x0000ffff));
7624 dchkh->dp.stream_sequence = htons((uint16_t) chk->rec.data.stream_seq);
7625 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7626 dchkh->ch.chunk_length = htons(chk->send_size);
7628 ndchkh->ch.chunk_type = SCTP_IDATA;
7629 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7630 ndchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7631 ndchkh->dp.stream_id = htons(strq->stream_no);
7632 ndchkh->dp.reserved = htons(0);
7633 ndchkh->dp.msg_id = htonl(chk->rec.data.stream_seq);
7635 ndchkh->dp.ppid_fsn.protocol_id = chk->rec.data.payloadtype;
7637 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7639 ndchkh->ch.chunk_length = htons(chk->send_size);
7641 /* Now advance the chk->send_size by the actual pad needed. */
7642 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7647 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7648 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7650 chk->last_mbuf = lm;
7651 chk->pad_inplace = 1;
7653 chk->send_size += pads;
7655 if (PR_SCTP_ENABLED(chk->flags)) {
7656 asoc->pr_sctp_cnt++;
7658 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7659 /* All done pull and kill the message */
7660 if (sp->put_last_out == 0) {
7661 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7662 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7663 sp->sender_all_done,
7665 sp->msg_is_complete,
7669 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7670 SCTP_TCB_SEND_LOCK(stcb);
7673 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7674 TAILQ_REMOVE(&strq->outqueue, sp, next);
7675 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7676 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7677 (strq->chunks_on_queues == 0) &&
7678 TAILQ_EMPTY(&strq->outqueue)) {
7679 stcb->asoc.trigger_reset = 1;
7682 sctp_free_remote_addr(sp->net);
7686 sctp_m_freem(sp->data);
7689 sctp_free_a_strmoq(stcb, sp, so_locked);
7691 asoc->chunks_on_out_queue++;
7692 strq->chunks_on_queues++;
7693 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7694 asoc->send_queue_cnt++;
7697 SCTP_TCB_SEND_UNLOCK(stcb);
7704 sctp_fill_outqueue(struct sctp_tcb *stcb,
7705 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7706 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7711 struct sctp_association *asoc;
7712 struct sctp_stream_out *strq;
7713 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7716 SCTP_TCB_LOCK_ASSERT(stcb);
7718 switch (net->ro._l_addr.sa.sa_family) {
7721 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7726 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7731 goal_mtu = net->mtu;
7734 /* Need an allowance for the data chunk header too */
7735 if (stcb->asoc.idata_supported == 0) {
7736 goal_mtu -= sizeof(struct sctp_data_chunk);
7738 goal_mtu -= sizeof(struct sctp_idata_chunk);
7741 /* must make even word boundary */
7742 goal_mtu &= 0xfffffffc;
7743 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7744 while ((goal_mtu > 0) && strq) {
7747 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point,
7748 &giveup, eeor_mode, &bail, so_locked);
7749 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7751 if ((giveup) || bail) {
7754 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7758 total_moved += moved_how_much;
7759 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7760 goal_mtu &= 0xfffffffc;
7765 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7767 if (total_moved == 0) {
7768 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7769 (net == stcb->asoc.primary_destination)) {
7770 /* ran dry for primary network net */
7771 SCTP_STAT_INCR(sctps_primary_randry);
7772 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7773 /* ran dry with CMT on */
7774 SCTP_STAT_INCR(sctps_cmt_randry);
7780 sctp_fix_ecn_echo(struct sctp_association *asoc)
7782 struct sctp_tmit_chunk *chk;
7784 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7785 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7786 chk->sent = SCTP_DATAGRAM_UNSENT;
7792 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7794 struct sctp_association *asoc;
7795 struct sctp_tmit_chunk *chk;
7796 struct sctp_stream_queue_pending *sp;
7803 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7804 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7805 if (sp->net == net) {
7806 sctp_free_remote_addr(sp->net);
7811 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7812 if (chk->whoTo == net) {
7813 sctp_free_remote_addr(chk->whoTo);
7820 sctp_med_chunk_output(struct sctp_inpcb *inp,
7821 struct sctp_tcb *stcb,
7822 struct sctp_association *asoc,
7825 int control_only, int from_where,
7826 struct timeval *now, int *now_filled, int frag_point, int so_locked
7827 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7833 * Ok this is the generic chunk service queue. we must do the
7835 * - Service the stream queue that is next, moving any
7836 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7837 * LAST to the out queue in one pass) and assigning TSN's. This
7838 * only applys though if the peer does not support NDATA. For NDATA
7839 * chunks its ok to not send the entire message ;-)
7840 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7841 * fomulate and send the low level chunks. Making sure to combine
7842 * any control in the control chunk queue also.
7844 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7845 struct mbuf *outchain, *endoutchain;
7846 struct sctp_tmit_chunk *chk, *nchk;
7848 /* temp arrays for unlinking */
7849 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7850 int no_fragmentflg, error;
7851 unsigned int max_rwnd_per_dest, max_send_per_dest;
7852 int one_chunk, hbflag, skip_data_for_this_net;
7853 int asconf, cookie, no_out_cnt;
7854 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7855 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7857 uint32_t auth_offset = 0;
7858 struct sctp_auth_chunk *auth = NULL;
7859 uint16_t auth_keyid;
7860 int override_ok = 1;
7861 int skip_fill_up = 0;
7862 int data_auth_reqd = 0;
7865 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7872 auth_keyid = stcb->asoc.authinfo.active_keyid;
7873 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7874 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7875 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7880 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7882 * First lets prime the pump. For each destination, if there is room
7883 * in the flight size, attempt to pull an MTU's worth out of the
7884 * stream queues into the general send_queue
7886 #ifdef SCTP_AUDITING_ENABLED
7887 sctp_audit_log(0xC2, 2);
7889 SCTP_TCB_LOCK_ASSERT(stcb);
7896 /* Nothing to possible to send? */
7897 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7898 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7899 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7900 TAILQ_EMPTY(&asoc->send_queue) &&
7901 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
7906 if (asoc->peers_rwnd == 0) {
7907 /* No room in peers rwnd */
7909 if (asoc->total_flight > 0) {
7910 /* we are allowed one chunk in flight */
7914 if (stcb->asoc.ecn_echo_cnt_onq) {
7915 /* Record where a sack goes, if any */
7916 if (no_data_chunks &&
7917 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7918 /* Nothing but ECNe to send - we don't do that */
7919 goto nothing_to_send;
7921 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7922 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7923 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7924 sack_goes_to = chk->whoTo;
7929 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7930 if (stcb->sctp_socket)
7931 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7933 max_send_per_dest = 0;
7934 if (no_data_chunks == 0) {
7935 /* How many non-directed chunks are there? */
7936 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7937 if (chk->whoTo == NULL) {
7939 * We already have non-directed chunks on
7940 * the queue, no need to do a fill-up.
7948 if ((no_data_chunks == 0) &&
7949 (skip_fill_up == 0) &&
7950 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7951 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7953 * This for loop we are in takes in each net, if
7954 * its's got space in cwnd and has data sent to it
7955 * (when CMT is off) then it calls
7956 * sctp_fill_outqueue for the net. This gets data on
7957 * the send queue for that network.
7959 * In sctp_fill_outqueue TSN's are assigned and data is
7960 * copied out of the stream buffers. Note mostly
7961 * copy by reference (we hope).
7963 net->window_probe = 0;
7964 if ((net != stcb->asoc.alternate) &&
7965 ((net->dest_state & SCTP_ADDR_PF) ||
7966 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7967 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7968 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7969 sctp_log_cwnd(stcb, net, 1,
7970 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7974 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7975 (net->flight_size == 0)) {
7976 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7978 if (net->flight_size >= net->cwnd) {
7979 /* skip this network, no room - can't fill */
7980 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7981 sctp_log_cwnd(stcb, net, 3,
7982 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7986 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7987 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7989 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7991 /* memory alloc failure */
7997 /* now service each destination and send out what we can for it */
7998 /* Nothing to send? */
7999 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8000 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8001 TAILQ_EMPTY(&asoc->send_queue)) {
8005 if (asoc->sctp_cmt_on_off > 0) {
8006 /* get the last start point */
8007 start_at = asoc->last_net_cmt_send_started;
8008 if (start_at == NULL) {
8009 /* null so to beginning */
8010 start_at = TAILQ_FIRST(&asoc->nets);
8012 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8013 if (start_at == NULL) {
8014 start_at = TAILQ_FIRST(&asoc->nets);
8017 asoc->last_net_cmt_send_started = start_at;
8019 start_at = TAILQ_FIRST(&asoc->nets);
8021 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8022 if (chk->whoTo == NULL) {
8023 if (asoc->alternate) {
8024 chk->whoTo = asoc->alternate;
8026 chk->whoTo = asoc->primary_destination;
8028 atomic_add_int(&chk->whoTo->ref_count, 1);
8031 old_start_at = NULL;
8032 again_one_more_time:
8033 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8034 /* how much can we send? */
8035 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8036 if (old_start_at && (old_start_at == net)) {
8037 /* through list ocmpletely. */
8041 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8042 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8043 (net->flight_size >= net->cwnd)) {
8045 * Nothing on control or asconf and flight is full,
8046 * we can skip even in the CMT case.
8051 endoutchain = outchain = NULL;
8054 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8055 skip_data_for_this_net = 1;
8057 skip_data_for_this_net = 0;
8059 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8062 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8067 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8077 if (mtu > asoc->peers_rwnd) {
8078 if (asoc->total_flight > 0) {
8079 /* We have a packet in flight somewhere */
8080 r_mtu = asoc->peers_rwnd;
8082 /* We are always allowed to send one MTU out */
8090 /************************/
8091 /* ASCONF transmission */
8092 /************************/
8093 /* Now first lets go through the asconf queue */
8094 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8095 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8098 if (chk->whoTo == NULL) {
8099 if (asoc->alternate == NULL) {
8100 if (asoc->primary_destination != net) {
8104 if (asoc->alternate != net) {
8109 if (chk->whoTo != net) {
8113 if (chk->data == NULL) {
8116 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8117 chk->sent != SCTP_DATAGRAM_RESEND) {
8121 * if no AUTH is yet included and this chunk
8122 * requires it, make sure to account for it. We
8123 * don't apply the size until the AUTH chunk is
8124 * actually added below in case there is no room for
8125 * this chunk. NOTE: we overload the use of "omtu"
8128 if ((auth == NULL) &&
8129 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8130 stcb->asoc.peer_auth_chunks)) {
8131 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8134 /* Here we do NOT factor the r_mtu */
8135 if ((chk->send_size < (int)(mtu - omtu)) ||
8136 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8138 * We probably should glom the mbuf chain
8139 * from the chk->data for control but the
8140 * problem is it becomes yet one more level
8141 * of tracking to do if for some reason
8142 * output fails. Then I have got to
8143 * reconstruct the merged control chain.. el
8144 * yucko.. for now we take the easy way and
8148 * Add an AUTH chunk, if chunk requires it
8149 * save the offset into the chain for AUTH
8151 if ((auth == NULL) &&
8152 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8153 stcb->asoc.peer_auth_chunks))) {
8154 outchain = sctp_add_auth_chunk(outchain,
8159 chk->rec.chunk_id.id);
8160 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8162 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8163 (int)chk->rec.chunk_id.can_take_data,
8164 chk->send_size, chk->copy_by_ref);
8165 if (outchain == NULL) {
8167 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8170 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8171 /* update our MTU size */
8172 if (mtu > (chk->send_size + omtu))
8173 mtu -= (chk->send_size + omtu);
8176 to_out += (chk->send_size + omtu);
8177 /* Do clear IP_DF ? */
8178 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8181 if (chk->rec.chunk_id.can_take_data)
8184 * set hb flag since we can use these for
8190 * should sysctl this: don't bundle data
8191 * with ASCONF since it requires AUTH
8194 chk->sent = SCTP_DATAGRAM_SENT;
8195 if (chk->whoTo == NULL) {
8197 atomic_add_int(&net->ref_count, 1);
8202 * Ok we are out of room but we can
8203 * output without effecting the
8204 * flight size since this little guy
8205 * is a control only packet.
8207 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8209 * do NOT clear the asconf flag as
8210 * it is used to do appropriate
8211 * source address selection.
8213 if (*now_filled == 0) {
8214 (void)SCTP_GETTIME_TIMEVAL(now);
8217 net->last_sent_time = *now;
8219 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8220 (struct sockaddr *)&net->ro._l_addr,
8221 outchain, auth_offset, auth,
8222 stcb->asoc.authinfo.active_keyid,
8223 no_fragmentflg, 0, asconf,
8224 inp->sctp_lport, stcb->rport,
8225 htonl(stcb->asoc.peer_vtag),
8230 * error, we could not
8233 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8234 if (from_where == 0) {
8235 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8237 if (error == ENOBUFS) {
8238 asoc->ifp_had_enobuf = 1;
8239 SCTP_STAT_INCR(sctps_lowlevelerr);
8241 /* error, could not output */
8242 if (error == EHOSTUNREACH) {
8248 sctp_move_chunks_from_net(stcb, net);
8253 asoc->ifp_had_enobuf = 0;
8256 * increase the number we sent, if a
8257 * cookie is sent we don't tell them
8260 outchain = endoutchain = NULL;
8264 *num_out += ctl_cnt;
8265 /* recalc a clean slate and setup */
8266 switch (net->ro._l_addr.sa.sa_family) {
8269 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8274 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8291 /************************/
8292 /* Control transmission */
8293 /************************/
8294 /* Now first lets go through the control queue */
8295 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8296 if ((sack_goes_to) &&
8297 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8298 (chk->whoTo != sack_goes_to)) {
8300 * if we have a sack in queue, and we are
8301 * looking at an ecn echo that is NOT queued
8302 * to where the sack is going..
8304 if (chk->whoTo == net) {
8306 * Don't transmit it to where its
8307 * going (current net)
8310 } else if (sack_goes_to == net) {
8312 * But do transmit it to this
8315 goto skip_net_check;
8318 if (chk->whoTo == NULL) {
8319 if (asoc->alternate == NULL) {
8320 if (asoc->primary_destination != net) {
8324 if (asoc->alternate != net) {
8329 if (chk->whoTo != net) {
8334 if (chk->data == NULL) {
8337 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8339 * It must be unsent. Cookies and ASCONF's
8340 * hang around but there timers will force
8341 * when marked for resend.
8346 * if no AUTH is yet included and this chunk
8347 * requires it, make sure to account for it. We
8348 * don't apply the size until the AUTH chunk is
8349 * actually added below in case there is no room for
8350 * this chunk. NOTE: we overload the use of "omtu"
8353 if ((auth == NULL) &&
8354 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8355 stcb->asoc.peer_auth_chunks)) {
8356 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8359 /* Here we do NOT factor the r_mtu */
8360 if ((chk->send_size <= (int)(mtu - omtu)) ||
8361 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8363 * We probably should glom the mbuf chain
8364 * from the chk->data for control but the
8365 * problem is it becomes yet one more level
8366 * of tracking to do if for some reason
8367 * output fails. Then I have got to
8368 * reconstruct the merged control chain.. el
8369 * yucko.. for now we take the easy way and
8373 * Add an AUTH chunk, if chunk requires it
8374 * save the offset into the chain for AUTH
8376 if ((auth == NULL) &&
8377 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8378 stcb->asoc.peer_auth_chunks))) {
8379 outchain = sctp_add_auth_chunk(outchain,
8384 chk->rec.chunk_id.id);
8385 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8387 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8388 (int)chk->rec.chunk_id.can_take_data,
8389 chk->send_size, chk->copy_by_ref);
8390 if (outchain == NULL) {
8392 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8395 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8396 /* update our MTU size */
8397 if (mtu > (chk->send_size + omtu))
8398 mtu -= (chk->send_size + omtu);
8401 to_out += (chk->send_size + omtu);
8402 /* Do clear IP_DF ? */
8403 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8406 if (chk->rec.chunk_id.can_take_data)
8408 /* Mark things to be removed, if needed */
8409 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8410 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8411 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8412 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8413 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8414 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8415 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8416 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8417 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8418 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8419 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8420 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8423 /* remove these chunks at the end */
8424 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8425 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8426 /* turn off the timer */
8427 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8428 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8430 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8436 * Other chunks, since they have
8437 * timers running (i.e. COOKIE) we
8438 * just "trust" that it gets sent or
8442 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8445 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8447 * Increment ecne send count
8448 * here this means we may be
8449 * over-zealous in our
8450 * counting if the send
8451 * fails, but its the best
8452 * place to do it (we used
8453 * to do it in the queue of
8454 * the chunk, but that did
8455 * not tell how many times
8458 SCTP_STAT_INCR(sctps_sendecne);
8460 chk->sent = SCTP_DATAGRAM_SENT;
8461 if (chk->whoTo == NULL) {
8463 atomic_add_int(&net->ref_count, 1);
8469 * Ok we are out of room but we can
8470 * output without effecting the
8471 * flight size since this little guy
8472 * is a control only packet.
8475 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8477 * do NOT clear the asconf
8478 * flag as it is used to do
8479 * appropriate source
8480 * address selection.
8484 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8487 /* Only HB or ASCONF advances time */
8489 if (*now_filled == 0) {
8490 (void)SCTP_GETTIME_TIMEVAL(now);
8493 net->last_sent_time = *now;
8496 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8497 (struct sockaddr *)&net->ro._l_addr,
8500 stcb->asoc.authinfo.active_keyid,
8501 no_fragmentflg, 0, asconf,
8502 inp->sctp_lport, stcb->rport,
8503 htonl(stcb->asoc.peer_vtag),
8508 * error, we could not
8511 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8512 if (from_where == 0) {
8513 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8515 if (error == ENOBUFS) {
8516 asoc->ifp_had_enobuf = 1;
8517 SCTP_STAT_INCR(sctps_lowlevelerr);
8519 if (error == EHOSTUNREACH) {
8525 sctp_move_chunks_from_net(stcb, net);
8530 asoc->ifp_had_enobuf = 0;
8533 * increase the number we sent, if a
8534 * cookie is sent we don't tell them
8537 outchain = endoutchain = NULL;
8541 *num_out += ctl_cnt;
8542 /* recalc a clean slate and setup */
8543 switch (net->ro._l_addr.sa.sa_family) {
8546 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8551 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8568 /* JRI: if dest is in PF state, do not send data to it */
8569 if ((asoc->sctp_cmt_on_off > 0) &&
8570 (net != stcb->asoc.alternate) &&
8571 (net->dest_state & SCTP_ADDR_PF)) {
8574 if (net->flight_size >= net->cwnd) {
8577 if ((asoc->sctp_cmt_on_off > 0) &&
8578 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8579 (net->flight_size > max_rwnd_per_dest)) {
8583 * We need a specific accounting for the usage of the send
8584 * buffer. We also need to check the number of messages per
8585 * net. For now, this is better than nothing and it disabled
8588 if ((asoc->sctp_cmt_on_off > 0) &&
8589 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8590 (max_send_per_dest > 0) &&
8591 (net->flight_size > max_send_per_dest)) {
8594 /*********************/
8595 /* Data transmission */
8596 /*********************/
8598 * if AUTH for DATA is required and no AUTH has been added
8599 * yet, account for this in the mtu now... if no data can be
8600 * bundled, this adjustment won't matter anyways since the
8601 * packet will be going out...
8603 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8604 stcb->asoc.peer_auth_chunks);
8605 if (data_auth_reqd && (auth == NULL)) {
8606 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8608 /* now lets add any data within the MTU constraints */
8609 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8612 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8613 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8620 if (net->mtu > SCTP_MIN_OVERHEAD)
8621 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8631 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8632 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8633 (skip_data_for_this_net == 0)) ||
8635 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8636 if (no_data_chunks) {
8637 /* let only control go out */
8641 if (net->flight_size >= net->cwnd) {
8642 /* skip this net, no room for data */
8646 if ((chk->whoTo != NULL) &&
8647 (chk->whoTo != net)) {
8648 /* Don't send the chunk on this net */
8651 if (asoc->sctp_cmt_on_off == 0) {
8652 if ((asoc->alternate) &&
8653 (asoc->alternate != net) &&
8654 (chk->whoTo == NULL)) {
8656 } else if ((net != asoc->primary_destination) &&
8657 (asoc->alternate == NULL) &&
8658 (chk->whoTo == NULL)) {
8662 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8664 * strange, we have a chunk that is
8665 * to big for its destination and
8666 * yet no fragment ok flag.
8667 * Something went wrong when the
8668 * PMTU changed...we did not mark
8669 * this chunk for some reason?? I
8670 * will fix it here by letting IP
8671 * fragment it for now and printing
8672 * a warning. This really should not
8675 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8676 chk->send_size, mtu);
8677 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8679 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8680 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8681 struct sctp_data_chunk *dchkh;
8683 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8684 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8686 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8687 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8688 /* ok we will add this one */
8691 * Add an AUTH chunk, if chunk
8692 * requires it, save the offset into
8693 * the chain for AUTH
8695 if (data_auth_reqd) {
8697 outchain = sctp_add_auth_chunk(outchain,
8703 auth_keyid = chk->auth_keyid;
8705 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8706 } else if (override_ok) {
8711 auth_keyid = chk->auth_keyid;
8713 } else if (auth_keyid != chk->auth_keyid) {
8721 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8722 chk->send_size, chk->copy_by_ref);
8723 if (outchain == NULL) {
8724 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8725 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8726 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8729 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8732 /* upate our MTU size */
8733 /* Do clear IP_DF ? */
8734 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8737 /* unsigned subtraction of mtu */
8738 if (mtu > chk->send_size)
8739 mtu -= chk->send_size;
8742 /* unsigned subtraction of r_mtu */
8743 if (r_mtu > chk->send_size)
8744 r_mtu -= chk->send_size;
8748 to_out += chk->send_size;
8749 if ((to_out > mx_mtu) && no_fragmentflg) {
8751 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8753 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8757 chk->window_probe = 0;
8758 data_list[bundle_at++] = chk;
8759 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8762 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8763 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8764 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8766 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8768 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8769 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8779 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8781 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8782 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8783 data_list[0]->window_probe = 1;
8784 net->window_probe = 1;
8790 * Must be sent in order of the
8791 * TSN's (on a network)
8795 } /* for (chunk gather loop for this net) */
8796 } /* if asoc.state OPEN */
8798 /* Is there something to send for this destination? */
8800 /* We may need to start a control timer or two */
8802 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8805 * do NOT clear the asconf flag as it is
8806 * used to do appropriate source address
8811 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8814 /* must start a send timer if data is being sent */
8815 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8817 * no timer running on this destination
8820 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8822 if (bundle_at || hbflag) {
8823 /* For data/asconf and hb set time */
8824 if (*now_filled == 0) {
8825 (void)SCTP_GETTIME_TIMEVAL(now);
8828 net->last_sent_time = *now;
8830 /* Now send it, if there is anything to send :> */
8831 if ((error = sctp_lowlevel_chunk_output(inp,
8834 (struct sockaddr *)&net->ro._l_addr,
8842 inp->sctp_lport, stcb->rport,
8843 htonl(stcb->asoc.peer_vtag),
8847 /* error, we could not output */
8848 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8849 if (from_where == 0) {
8850 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8852 if (error == ENOBUFS) {
8853 SCTP_STAT_INCR(sctps_lowlevelerr);
8854 asoc->ifp_had_enobuf = 1;
8856 if (error == EHOSTUNREACH) {
8858 * Destination went unreachable
8861 sctp_move_chunks_from_net(stcb, net);
8865 * I add this line to be paranoid. As far as
8866 * I can tell the continue, takes us back to
8867 * the top of the for, but just to make sure
8868 * I will reset these again here.
8870 ctl_cnt = bundle_at = 0;
8871 continue; /* This takes us back to the
8872 * for() for the nets. */
8874 asoc->ifp_had_enobuf = 0;
8880 *num_out += (ctl_cnt + bundle_at);
8883 /* setup for a RTO measurement */
8884 tsns_sent = data_list[0]->rec.data.TSN_seq;
8885 /* fill time if not already filled */
8886 if (*now_filled == 0) {
8887 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8889 *now = asoc->time_last_sent;
8891 asoc->time_last_sent = *now;
8893 if (net->rto_needed) {
8894 data_list[0]->do_rtt = 1;
8895 net->rto_needed = 0;
8897 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8898 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8904 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8905 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8908 if (old_start_at == NULL) {
8909 old_start_at = start_at;
8910 start_at = TAILQ_FIRST(&asoc->nets);
8912 goto again_one_more_time;
8915 * At the end there should be no NON timed chunks hanging on this
8918 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8919 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8921 if ((*num_out == 0) && (*reason_code == 0)) {
8926 sctp_clean_up_ctl(stcb, asoc, so_locked);
8931 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8934 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8935 * the control chunk queue.
8937 struct sctp_chunkhdr *hdr;
8938 struct sctp_tmit_chunk *chk;
8939 struct mbuf *mat, *last_mbuf;
8940 uint32_t chunk_length;
8941 uint16_t padding_length;
8943 SCTP_TCB_LOCK_ASSERT(stcb);
8944 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8945 if (op_err == NULL) {
8950 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8951 chunk_length += SCTP_BUF_LEN(mat);
8952 if (SCTP_BUF_NEXT(mat) == NULL) {
8956 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8957 sctp_m_freem(op_err);
8960 padding_length = chunk_length % 4;
8961 if (padding_length != 0) {
8962 padding_length = 4 - padding_length;
8964 if (padding_length != 0) {
8965 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8966 sctp_m_freem(op_err);
8970 sctp_alloc_a_chunk(stcb, chk);
8973 sctp_m_freem(op_err);
8976 chk->copy_by_ref = 0;
8977 chk->send_size = (uint16_t) chunk_length;
8978 chk->sent = SCTP_DATAGRAM_UNSENT;
8980 chk->asoc = &stcb->asoc;
8983 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8984 chk->rec.chunk_id.can_take_data = 0;
8985 hdr = mtod(op_err, struct sctp_chunkhdr *);
8986 hdr->chunk_type = SCTP_OPERATION_ERROR;
8987 hdr->chunk_flags = 0;
8988 hdr->chunk_length = htons(chk->send_size);
8989 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8990 chk->asoc->ctrl_queue_cnt++;
8994 sctp_send_cookie_echo(struct mbuf *m,
8996 struct sctp_tcb *stcb,
8997 struct sctp_nets *net)
9000 * pull out the cookie and put it at the front of the control chunk
9004 struct mbuf *cookie;
9005 struct sctp_paramhdr parm, *phdr;
9006 struct sctp_chunkhdr *hdr;
9007 struct sctp_tmit_chunk *chk;
9008 uint16_t ptype, plen;
9010 SCTP_TCB_LOCK_ASSERT(stcb);
9011 /* First find the cookie in the param area */
9013 at = offset + sizeof(struct sctp_init_chunk);
9015 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
9019 ptype = ntohs(phdr->param_type);
9020 plen = ntohs(phdr->param_length);
9021 if (ptype == SCTP_STATE_COOKIE) {
9024 /* found the cookie */
9025 if ((pad = (plen % 4))) {
9028 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9029 if (cookie == NULL) {
9033 #ifdef SCTP_MBUF_LOGGING
9034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9035 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9040 at += SCTP_SIZE32(plen);
9042 /* ok, we got the cookie lets change it into a cookie echo chunk */
9043 /* first the change from param to cookie */
9044 hdr = mtod(cookie, struct sctp_chunkhdr *);
9045 hdr->chunk_type = SCTP_COOKIE_ECHO;
9046 hdr->chunk_flags = 0;
9047 /* get the chunk stuff now and place it in the FRONT of the queue */
9048 sctp_alloc_a_chunk(stcb, chk);
9051 sctp_m_freem(cookie);
9054 chk->copy_by_ref = 0;
9055 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9056 chk->rec.chunk_id.can_take_data = 0;
9057 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9058 chk->send_size = plen;
9059 chk->sent = SCTP_DATAGRAM_UNSENT;
9061 chk->asoc = &stcb->asoc;
9064 atomic_add_int(&chk->whoTo->ref_count, 1);
9065 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9066 chk->asoc->ctrl_queue_cnt++;
9071 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9075 struct sctp_nets *net)
9078 * take a HB request and make it into a HB ack and send it.
9080 struct mbuf *outchain;
9081 struct sctp_chunkhdr *chdr;
9082 struct sctp_tmit_chunk *chk;
9086 /* must have a net pointer */
9089 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9090 if (outchain == NULL) {
9091 /* gak out of memory */
9094 #ifdef SCTP_MBUF_LOGGING
9095 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9096 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9099 chdr = mtod(outchain, struct sctp_chunkhdr *);
9100 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9101 chdr->chunk_flags = 0;
9102 if (chk_length % 4) {
9104 uint32_t cpthis = 0;
9107 padlen = 4 - (chk_length % 4);
9108 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9110 sctp_alloc_a_chunk(stcb, chk);
9113 sctp_m_freem(outchain);
9116 chk->copy_by_ref = 0;
9117 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9118 chk->rec.chunk_id.can_take_data = 1;
9120 chk->send_size = chk_length;
9121 chk->sent = SCTP_DATAGRAM_UNSENT;
9123 chk->asoc = &stcb->asoc;
9124 chk->data = outchain;
9126 atomic_add_int(&chk->whoTo->ref_count, 1);
9127 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9128 chk->asoc->ctrl_queue_cnt++;
9132 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9134 /* formulate and queue a cookie-ack back to sender */
9135 struct mbuf *cookie_ack;
9136 struct sctp_chunkhdr *hdr;
9137 struct sctp_tmit_chunk *chk;
9139 SCTP_TCB_LOCK_ASSERT(stcb);
9141 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9142 if (cookie_ack == NULL) {
9146 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9147 sctp_alloc_a_chunk(stcb, chk);
9150 sctp_m_freem(cookie_ack);
9153 chk->copy_by_ref = 0;
9154 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9155 chk->rec.chunk_id.can_take_data = 1;
9157 chk->send_size = sizeof(struct sctp_chunkhdr);
9158 chk->sent = SCTP_DATAGRAM_UNSENT;
9160 chk->asoc = &stcb->asoc;
9161 chk->data = cookie_ack;
9162 if (chk->asoc->last_control_chunk_from != NULL) {
9163 chk->whoTo = chk->asoc->last_control_chunk_from;
9164 atomic_add_int(&chk->whoTo->ref_count, 1);
9168 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9169 hdr->chunk_type = SCTP_COOKIE_ACK;
9170 hdr->chunk_flags = 0;
9171 hdr->chunk_length = htons(chk->send_size);
9172 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9173 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9174 chk->asoc->ctrl_queue_cnt++;
9180 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9182 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9183 struct mbuf *m_shutdown_ack;
9184 struct sctp_shutdown_ack_chunk *ack_cp;
9185 struct sctp_tmit_chunk *chk;
9187 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9188 if (m_shutdown_ack == NULL) {
9192 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9193 sctp_alloc_a_chunk(stcb, chk);
9196 sctp_m_freem(m_shutdown_ack);
9199 chk->copy_by_ref = 0;
9200 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9201 chk->rec.chunk_id.can_take_data = 1;
9203 chk->send_size = sizeof(struct sctp_chunkhdr);
9204 chk->sent = SCTP_DATAGRAM_UNSENT;
9207 chk->asoc = &stcb->asoc;
9208 chk->data = m_shutdown_ack;
9211 atomic_add_int(&chk->whoTo->ref_count, 1);
9213 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9214 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9215 ack_cp->ch.chunk_flags = 0;
9216 ack_cp->ch.chunk_length = htons(chk->send_size);
9217 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9218 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9219 chk->asoc->ctrl_queue_cnt++;
9224 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9226 /* formulate and queue a SHUTDOWN to the sender */
9227 struct mbuf *m_shutdown;
9228 struct sctp_shutdown_chunk *shutdown_cp;
9229 struct sctp_tmit_chunk *chk;
9231 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9232 if (m_shutdown == NULL) {
9236 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9237 sctp_alloc_a_chunk(stcb, chk);
9240 sctp_m_freem(m_shutdown);
9243 chk->copy_by_ref = 0;
9244 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9245 chk->rec.chunk_id.can_take_data = 1;
9247 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9248 chk->sent = SCTP_DATAGRAM_UNSENT;
9251 chk->asoc = &stcb->asoc;
9252 chk->data = m_shutdown;
9255 atomic_add_int(&chk->whoTo->ref_count, 1);
9257 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9258 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9259 shutdown_cp->ch.chunk_flags = 0;
9260 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9261 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9262 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9263 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9264 chk->asoc->ctrl_queue_cnt++;
9269 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9272 * formulate and queue an ASCONF to the peer. ASCONF parameters
9273 * should be queued on the assoc queue.
9275 struct sctp_tmit_chunk *chk;
9276 struct mbuf *m_asconf;
9279 SCTP_TCB_LOCK_ASSERT(stcb);
9281 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9282 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9283 /* can't send a new one if there is one in flight already */
9286 /* compose an ASCONF chunk, maximum length is PMTU */
9287 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9288 if (m_asconf == NULL) {
9291 sctp_alloc_a_chunk(stcb, chk);
9294 sctp_m_freem(m_asconf);
9297 chk->copy_by_ref = 0;
9298 chk->rec.chunk_id.id = SCTP_ASCONF;
9299 chk->rec.chunk_id.can_take_data = 0;
9300 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9301 chk->data = m_asconf;
9302 chk->send_size = len;
9303 chk->sent = SCTP_DATAGRAM_UNSENT;
9305 chk->asoc = &stcb->asoc;
9308 atomic_add_int(&chk->whoTo->ref_count, 1);
9310 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9311 chk->asoc->ctrl_queue_cnt++;
9316 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9319 * formulate and queue a asconf-ack back to sender. the asconf-ack
9320 * must be stored in the tcb.
9322 struct sctp_tmit_chunk *chk;
9323 struct sctp_asconf_ack *ack, *latest_ack;
9325 struct sctp_nets *net = NULL;
9327 SCTP_TCB_LOCK_ASSERT(stcb);
9328 /* Get the latest ASCONF-ACK */
9329 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9330 if (latest_ack == NULL) {
9333 if (latest_ack->last_sent_to != NULL &&
9334 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9335 /* we're doing a retransmission */
9336 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9339 if (stcb->asoc.last_control_chunk_from == NULL) {
9340 if (stcb->asoc.alternate) {
9341 net = stcb->asoc.alternate;
9343 net = stcb->asoc.primary_destination;
9346 net = stcb->asoc.last_control_chunk_from;
9351 if (stcb->asoc.last_control_chunk_from == NULL) {
9352 if (stcb->asoc.alternate) {
9353 net = stcb->asoc.alternate;
9355 net = stcb->asoc.primary_destination;
9358 net = stcb->asoc.last_control_chunk_from;
9361 latest_ack->last_sent_to = net;
9363 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9364 if (ack->data == NULL) {
9367 /* copy the asconf_ack */
9368 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9369 if (m_ack == NULL) {
9370 /* couldn't copy it */
9373 #ifdef SCTP_MBUF_LOGGING
9374 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9375 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9379 sctp_alloc_a_chunk(stcb, chk);
9383 sctp_m_freem(m_ack);
9386 chk->copy_by_ref = 0;
9387 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9388 chk->rec.chunk_id.can_take_data = 1;
9389 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9392 atomic_add_int(&chk->whoTo->ref_count, 1);
9395 chk->send_size = ack->len;
9396 chk->sent = SCTP_DATAGRAM_UNSENT;
9398 chk->asoc = &stcb->asoc;
9400 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9401 chk->asoc->ctrl_queue_cnt++;
9408 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9409 struct sctp_tcb *stcb,
9410 struct sctp_association *asoc,
9411 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9412 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9418 * send out one MTU of retransmission. If fast_retransmit is
9419 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9420 * rwnd. For a Cookie or Asconf in the control chunk queue we
9421 * retransmit them by themselves.
9423 * For data chunks we will pick out the lowest TSN's in the sent_queue
9424 * marked for resend and bundle them all together (up to a MTU of
9425 * destination). The address to send to should have been
9426 * selected/changed where the retransmission was marked (i.e. in FR
9427 * or t3-timeout routines).
9429 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9430 struct sctp_tmit_chunk *chk, *fwd;
9431 struct mbuf *m, *endofchain;
9432 struct sctp_nets *net = NULL;
9433 uint32_t tsns_sent = 0;
9434 int no_fragmentflg, bundle_at, cnt_thru;
9436 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9437 struct sctp_auth_chunk *auth = NULL;
9438 uint32_t auth_offset = 0;
9439 uint16_t auth_keyid;
9440 int override_ok = 1;
9441 int data_auth_reqd = 0;
9444 SCTP_TCB_LOCK_ASSERT(stcb);
9445 tmr_started = ctl_cnt = bundle_at = error = 0;
9450 endofchain = m = NULL;
9451 auth_keyid = stcb->asoc.authinfo.active_keyid;
9452 #ifdef SCTP_AUDITING_ENABLED
9453 sctp_audit_log(0xC3, 1);
9455 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9456 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9457 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9458 asoc->sent_queue_retran_cnt);
9459 asoc->sent_queue_cnt = 0;
9460 asoc->sent_queue_cnt_removeable = 0;
9461 /* send back 0/0 so we enter normal transmission */
9465 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9466 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9467 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9468 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9469 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9472 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9473 if (chk != asoc->str_reset) {
9475 * not eligible for retran if its
9482 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9486 * Add an AUTH chunk, if chunk requires it save the
9487 * offset into the chain for AUTH
9489 if ((auth == NULL) &&
9490 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9491 stcb->asoc.peer_auth_chunks))) {
9492 m = sctp_add_auth_chunk(m, &endofchain,
9493 &auth, &auth_offset,
9495 chk->rec.chunk_id.id);
9496 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9498 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9504 /* do we have control chunks to retransmit? */
9506 /* Start a timer no matter if we succeed or fail */
9507 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9508 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9509 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9510 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9511 chk->snd_count++; /* update our count */
9512 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9513 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9514 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9515 no_fragmentflg, 0, 0,
9516 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9517 chk->whoTo->port, NULL,
9520 SCTP_STAT_INCR(sctps_lowlevelerr);
9527 * We don't want to mark the net->sent time here since this
9528 * we use this for HB and retrans cannot measure RTT
9530 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9532 chk->sent = SCTP_DATAGRAM_SENT;
9533 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9537 /* Clean up the fwd-tsn list */
9538 sctp_clean_up_ctl(stcb, asoc, so_locked);
9543 * Ok, it is just data retransmission we need to do or that and a
9544 * fwd-tsn with it all.
9546 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9547 return (SCTP_RETRAN_DONE);
9549 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9550 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9551 /* not yet open, resend the cookie and that is it */
9554 #ifdef SCTP_AUDITING_ENABLED
9555 sctp_auditing(20, inp, stcb, NULL);
9557 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9558 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9559 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9560 /* No, not sent to this net or not ready for rtx */
9563 if (chk->data == NULL) {
9564 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9565 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9568 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9569 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9570 struct mbuf *op_err;
9571 char msg[SCTP_DIAG_INFO_LEN];
9573 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9574 chk->rec.data.TSN_seq, chk->snd_count);
9575 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9577 atomic_add_int(&stcb->asoc.refcnt, 1);
9578 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9580 SCTP_TCB_LOCK(stcb);
9581 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9582 return (SCTP_RETRAN_EXIT);
9584 /* pick up the net */
9586 switch (net->ro._l_addr.sa.sa_family) {
9589 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9594 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9603 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9604 /* No room in peers rwnd */
9607 tsn = asoc->last_acked_seq + 1;
9608 if (tsn == chk->rec.data.TSN_seq) {
9610 * we make a special exception for this
9611 * case. The peer has no rwnd but is missing
9612 * the lowest chunk.. which is probably what
9613 * is holding up the rwnd.
9615 goto one_chunk_around;
9620 if (asoc->peers_rwnd < mtu) {
9622 if ((asoc->peers_rwnd == 0) &&
9623 (asoc->total_flight == 0)) {
9624 chk->window_probe = 1;
9625 chk->whoTo->window_probe = 1;
9628 #ifdef SCTP_AUDITING_ENABLED
9629 sctp_audit_log(0xC3, 2);
9633 net->fast_retran_ip = 0;
9634 if (chk->rec.data.doing_fast_retransmit == 0) {
9636 * if no FR in progress skip destination that have
9637 * flight_size > cwnd.
9639 if (net->flight_size >= net->cwnd) {
9644 * Mark the destination net to have FR recovery
9648 net->fast_retran_ip = 1;
9652 * if no AUTH is yet included and this chunk requires it,
9653 * make sure to account for it. We don't apply the size
9654 * until the AUTH chunk is actually added below in case
9655 * there is no room for this chunk.
9657 if (data_auth_reqd && (auth == NULL)) {
9658 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9662 if ((chk->send_size <= (mtu - dmtu)) ||
9663 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9664 /* ok we will add this one */
9665 if (data_auth_reqd) {
9667 m = sctp_add_auth_chunk(m,
9673 auth_keyid = chk->auth_keyid;
9675 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9676 } else if (override_ok) {
9677 auth_keyid = chk->auth_keyid;
9679 } else if (chk->auth_keyid != auth_keyid) {
9680 /* different keyid, so done bundling */
9684 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9686 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9689 /* Do clear IP_DF ? */
9690 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9693 /* upate our MTU size */
9694 if (mtu > (chk->send_size + dmtu))
9695 mtu -= (chk->send_size + dmtu);
9698 data_list[bundle_at++] = chk;
9699 if (one_chunk && (asoc->total_flight <= 0)) {
9700 SCTP_STAT_INCR(sctps_windowprobed);
9703 if (one_chunk == 0) {
9705 * now are there anymore forward from chk to pick
9708 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9709 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9710 /* Nope, not for retran */
9713 if (fwd->whoTo != net) {
9714 /* Nope, not the net in question */
9717 if (data_auth_reqd && (auth == NULL)) {
9718 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9721 if (fwd->send_size <= (mtu - dmtu)) {
9722 if (data_auth_reqd) {
9724 m = sctp_add_auth_chunk(m,
9730 auth_keyid = fwd->auth_keyid;
9732 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9733 } else if (override_ok) {
9734 auth_keyid = fwd->auth_keyid;
9736 } else if (fwd->auth_keyid != auth_keyid) {
9744 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9746 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9749 /* Do clear IP_DF ? */
9750 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9753 /* upate our MTU size */
9754 if (mtu > (fwd->send_size + dmtu))
9755 mtu -= (fwd->send_size + dmtu);
9758 data_list[bundle_at++] = fwd;
9759 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9763 /* can't fit so we are done */
9768 /* Is there something to send for this destination? */
9771 * No matter if we fail/or succeed we should start a
9772 * timer. A failure is like a lost IP packet :-)
9774 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9776 * no timer running on this destination
9779 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9782 /* Now lets send it, if there is anything to send :> */
9783 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9784 (struct sockaddr *)&net->ro._l_addr, m,
9785 auth_offset, auth, auth_keyid,
9786 no_fragmentflg, 0, 0,
9787 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9791 /* error, we could not output */
9792 SCTP_STAT_INCR(sctps_lowlevelerr);
9800 * We don't want to mark the net->sent time here
9801 * since this we use this for HB and retrans cannot
9804 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9806 /* For auto-close */
9808 if (*now_filled == 0) {
9809 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9810 *now = asoc->time_last_sent;
9813 asoc->time_last_sent = *now;
9815 *cnt_out += bundle_at;
9816 #ifdef SCTP_AUDITING_ENABLED
9817 sctp_audit_log(0xC4, bundle_at);
9820 tsns_sent = data_list[0]->rec.data.TSN_seq;
9822 for (i = 0; i < bundle_at; i++) {
9823 SCTP_STAT_INCR(sctps_sendretransdata);
9824 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9826 * When we have a revoked data, and we
9827 * retransmit it, then we clear the revoked
9828 * flag since this flag dictates if we
9829 * subtracted from the fs
9831 if (data_list[i]->rec.data.chunk_was_revoked) {
9832 /* Deflate the cwnd */
9833 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9834 data_list[i]->rec.data.chunk_was_revoked = 0;
9836 data_list[i]->snd_count++;
9837 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9838 /* record the time */
9839 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9840 if (data_list[i]->book_size_scale) {
9842 * need to double the book size on
9845 data_list[i]->book_size_scale = 0;
9847 * Since we double the booksize, we
9848 * must also double the output queue
9849 * size, since this get shrunk when
9850 * we free by this amount.
9852 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9853 data_list[i]->book_size *= 2;
9857 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9858 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9859 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9861 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9862 (uint32_t) (data_list[i]->send_size +
9863 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9865 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9866 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9867 data_list[i]->whoTo->flight_size,
9868 data_list[i]->book_size,
9869 (uint32_t) (uintptr_t) data_list[i]->whoTo,
9870 data_list[i]->rec.data.TSN_seq);
9872 sctp_flight_size_increase(data_list[i]);
9873 sctp_total_flight_increase(stcb, data_list[i]);
9874 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9875 /* SWS sender side engages */
9876 asoc->peers_rwnd = 0;
9879 (data_list[i]->rec.data.doing_fast_retransmit)) {
9880 SCTP_STAT_INCR(sctps_sendfastretrans);
9881 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9882 (tmr_started == 0)) {
9884 * ok we just fast-retrans'd
9885 * the lowest TSN, i.e the
9886 * first on the list. In
9887 * this case we want to give
9888 * some more time to get a
9889 * SACK back without a
9892 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9893 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9894 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9898 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9899 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9901 #ifdef SCTP_AUDITING_ENABLED
9902 sctp_auditing(21, inp, stcb, NULL);
9908 if (asoc->sent_queue_retran_cnt <= 0) {
9909 /* all done we have no more to retran */
9910 asoc->sent_queue_retran_cnt = 0;
9914 /* No more room in rwnd */
9917 /* stop the for loop here. we sent out a packet */
9924 sctp_timer_validation(struct sctp_inpcb *inp,
9925 struct sctp_tcb *stcb,
9926 struct sctp_association *asoc)
9928 struct sctp_nets *net;
9930 /* Validate that a timer is running somewhere */
9931 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9932 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9933 /* Here is a timer */
9937 SCTP_TCB_LOCK_ASSERT(stcb);
9938 /* Gak, we did not have a timer somewhere */
9939 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9940 if (asoc->alternate) {
9941 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9943 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9949 sctp_chunk_output(struct sctp_inpcb *inp,
9950 struct sctp_tcb *stcb,
9953 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9959 * Ok this is the generic chunk service queue. we must do the
9961 * - See if there are retransmits pending, if so we must
9963 * - Service the stream queue that is next, moving any
9964 * message (note I must get a complete message i.e.
9965 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9967 * - Check to see if the cwnd/rwnd allows any output, if so we
9968 * go ahead and fomulate and send the low level chunks. Making sure
9969 * to combine any control in the control chunk queue also.
9971 struct sctp_association *asoc;
9972 struct sctp_nets *net;
9973 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9974 unsigned int burst_cnt = 0;
9978 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9981 unsigned int tot_frs = 0;
9985 /* The Nagle algorithm is only applied when handling a send call. */
9986 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9987 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9995 SCTP_TCB_LOCK_ASSERT(stcb);
9997 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9999 if ((un_sent <= 0) &&
10000 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10001 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10002 (asoc->sent_queue_retran_cnt == 0) &&
10003 (asoc->trigger_reset == 0)) {
10004 /* Nothing to do unless there is something to be sent left */
10008 * Do we have something to send, data or control AND a sack timer
10009 * running, if so piggy-back the sack.
10011 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10012 sctp_send_sack(stcb, so_locked);
10013 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10015 while (asoc->sent_queue_retran_cnt) {
10017 * Ok, it is retransmission time only, we send out only ONE
10018 * packet with a single call off to the retran code.
10020 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10022 * Special hook for handling cookiess discarded
10023 * by peer that carried data. Send cookie-ack only
10024 * and then the next call with get the retran's.
10026 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10028 &now, &now_filled, frag_point, so_locked);
10030 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10031 /* if its not from a HB then do it */
10033 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10039 * its from any other place, we don't allow retran
10040 * output (only control)
10045 /* Can't send anymore */
10047 * now lets push out control by calling med-level
10048 * output once. this assures that we WILL send HB's
10051 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10053 &now, &now_filled, frag_point, so_locked);
10054 #ifdef SCTP_AUDITING_ENABLED
10055 sctp_auditing(8, inp, stcb, NULL);
10057 sctp_timer_validation(inp, stcb, asoc);
10062 * The count was off.. retran is not happening so do
10063 * the normal retransmission.
10065 #ifdef SCTP_AUDITING_ENABLED
10066 sctp_auditing(9, inp, stcb, NULL);
10068 if (ret == SCTP_RETRAN_EXIT) {
10073 if (from_where == SCTP_OUTPUT_FROM_T3) {
10074 /* Only one transmission allowed out of a timeout */
10075 #ifdef SCTP_AUDITING_ENABLED
10076 sctp_auditing(10, inp, stcb, NULL);
10078 /* Push out any control */
10079 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10080 &now, &now_filled, frag_point, so_locked);
10083 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10084 /* Hit FR burst limit */
10087 if ((num_out == 0) && (ret == 0)) {
10088 /* No more retrans to send */
10092 #ifdef SCTP_AUDITING_ENABLED
10093 sctp_auditing(12, inp, stcb, NULL);
10095 /* Check for bad destinations, if they exist move chunks around. */
10096 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10097 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10099 * if possible move things off of this address we
10100 * still may send below due to the dormant state but
10101 * we try to find an alternate address to send to
10102 * and if we have one we move all queued data on the
10103 * out wheel to this alternate address.
10105 if (net->ref_count > 1)
10106 sctp_move_chunks_from_net(stcb, net);
10109 * if ((asoc->sat_network) || (net->addr_is_local))
10110 * { burst_limit = asoc->max_burst *
10111 * SCTP_SAT_NETWORK_BURST_INCR; }
10113 if (asoc->max_burst > 0) {
10114 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10115 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10117 * JRS - Use the congestion
10118 * control given in the
10119 * congestion control module
10121 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10122 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10123 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10125 SCTP_STAT_INCR(sctps_maxburstqueued);
10127 net->fast_retran_ip = 0;
10129 if (net->flight_size == 0) {
10131 * Should be decaying the
10143 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10144 &reason_code, 0, from_where,
10145 &now, &now_filled, frag_point, so_locked);
10147 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10148 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10149 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10151 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10152 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10153 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10157 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10159 tot_out += num_out;
10161 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10162 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10163 if (num_out == 0) {
10164 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10169 * When the Nagle algorithm is used, look at how
10170 * much is unsent, then if its smaller than an MTU
10171 * and we have data in flight we stop, except if we
10172 * are handling a fragmented user message.
10174 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10175 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10176 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10177 (stcb->asoc.total_flight > 0)) {
10178 /* && sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {*/
10182 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10183 TAILQ_EMPTY(&asoc->send_queue) &&
10184 sctp_is_there_unsent_data(stcb, so_locked) == 0) {
10185 /* Nothing left to send */
10188 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10189 /* Nothing left to send */
10192 } while (num_out &&
10193 ((asoc->max_burst == 0) ||
10194 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10195 (burst_cnt < asoc->max_burst)));
10197 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10198 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10199 SCTP_STAT_INCR(sctps_maxburstqueued);
10200 asoc->burst_limit_applied = 1;
10201 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10202 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10205 asoc->burst_limit_applied = 0;
10208 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10209 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10211 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10215 * Now we need to clean up the control chunk chain if a ECNE is on
10216 * it. It must be marked as UNSENT again so next call will continue
10217 * to send it until such time that we get a CWR, to remove it.
10219 if (stcb->asoc.ecn_echo_cnt_onq)
10220 sctp_fix_ecn_echo(asoc);
10222 if (stcb->asoc.trigger_reset) {
10223 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10233 struct sctp_inpcb *inp,
10235 struct sockaddr *addr,
10236 struct mbuf *control,
10241 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10244 if (inp->sctp_socket == NULL) {
10245 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10248 return (sctp_sosend(inp->sctp_socket,
10250 (struct uio *)NULL,
10258 send_forward_tsn(struct sctp_tcb *stcb,
10259 struct sctp_association *asoc)
10261 struct sctp_tmit_chunk *chk, *at, *tp1, *last;
10262 struct sctp_forward_tsn_chunk *fwdtsn;
10263 struct sctp_strseq *strseq;
10264 struct sctp_strseq_mid *strseq_m;
10265 uint32_t advance_peer_ack_point;
10266 unsigned int cnt_of_space, i, ovh;
10267 unsigned int space_needed;
10268 unsigned int cnt_of_skipped = 0;
10271 if (asoc->idata_supported) {
10276 SCTP_TCB_LOCK_ASSERT(stcb);
10277 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10278 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10279 /* mark it to unsent */
10280 chk->sent = SCTP_DATAGRAM_UNSENT;
10281 chk->snd_count = 0;
10282 /* Do we correct its output location? */
10284 sctp_free_remote_addr(chk->whoTo);
10287 goto sctp_fill_in_rest;
10290 /* Ok if we reach here we must build one */
10291 sctp_alloc_a_chunk(stcb, chk);
10295 asoc->fwd_tsn_cnt++;
10296 chk->copy_by_ref = 0;
10298 * We don't do the old thing here since this is used not for on-wire
10299 * but to tell if we are sending a fwd-tsn by the stack during
10300 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10302 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10303 chk->rec.chunk_id.can_take_data = 0;
10307 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10308 if (chk->data == NULL) {
10309 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10312 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10313 chk->sent = SCTP_DATAGRAM_UNSENT;
10314 chk->snd_count = 0;
10315 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10316 asoc->ctrl_queue_cnt++;
10319 * Here we go through and fill out the part that deals with
10320 * stream/seq of the ones we skip.
10322 SCTP_BUF_LEN(chk->data) = 0;
10323 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10324 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10325 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10326 /* no more to look at */
10329 if (old && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10330 /* We don't report these */
10336 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10337 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10339 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10340 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10342 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10344 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10345 ovh = SCTP_MIN_OVERHEAD;
10347 ovh = SCTP_MIN_V4_OVERHEAD;
10349 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10350 /* trim to a mtu size */
10351 cnt_of_space = asoc->smallest_mtu - ovh;
10353 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10354 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10355 0xff, 0, cnt_of_skipped,
10356 asoc->advanced_peer_ack_point);
10358 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10359 if (cnt_of_space < space_needed) {
10361 * ok we must trim down the chunk by lowering the
10362 * advance peer ack point.
10364 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10365 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10366 0xff, 0xff, cnt_of_space,
10370 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10371 cnt_of_skipped /= sizeof(struct sctp_strseq);
10373 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10374 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10377 * Go through and find the TSN that will be the one
10380 at = TAILQ_FIRST(&asoc->sent_queue);
10382 for (i = 0; i < cnt_of_skipped; i++) {
10383 tp1 = TAILQ_NEXT(at, sctp_next);
10390 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10391 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10392 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10393 asoc->advanced_peer_ack_point);
10397 * last now points to last one I can report, update
10401 advance_peer_ack_point = last->rec.data.TSN_seq;
10404 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10405 cnt_of_skipped * sizeof(struct sctp_strseq);
10407 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10408 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10411 chk->send_size = space_needed;
10412 /* Setup the chunk */
10413 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10414 fwdtsn->ch.chunk_length = htons(chk->send_size);
10415 fwdtsn->ch.chunk_flags = 0;
10417 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10419 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10421 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10422 SCTP_BUF_LEN(chk->data) = chk->send_size;
10425 * Move pointer to after the fwdtsn and transfer to the
10429 strseq = (struct sctp_strseq *)fwdtsn;
10431 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10434 * Now populate the strseq list. This is done blindly
10435 * without pulling out duplicate stream info. This is
10436 * inefficent but won't harm the process since the peer will
10437 * look at these in sequence and will thus release anything.
10438 * It could mean we exceed the PMTU and chop off some that
10439 * we could have included.. but this is unlikely (aka 1432/4
10440 * would mean 300+ stream seq's would have to be reported in
10441 * one FWD-TSN. With a bit of work we can later FIX this to
10442 * optimize and pull out duplicates.. but it does add more
10443 * overhead. So for now... not!
10446 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10447 if (i >= cnt_of_skipped) {
10450 if (old && (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED)) {
10451 /* We don't report these */
10454 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10455 at->rec.data.fwd_tsn_cnt = 0;
10458 strseq->stream = htons(at->rec.data.stream_number);
10459 strseq->sequence = htons((uint16_t) at->rec.data.stream_seq);
10462 strseq_m->stream = htons(at->rec.data.stream_number);
10463 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10464 strseq_m->flags = htons(PR_SCTP_UNORDERED_FLAG);
10466 strseq_m->flags = 0;
10468 strseq_m->msg_id = htonl(at->rec.data.stream_seq);
10477 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10478 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10484 * Queue up a SACK or NR-SACK in the control queue.
10485 * We must first check to see if a SACK or NR-SACK is
10486 * somehow on the control queue.
10487 * If so, we will take and and remove the old one.
10489 struct sctp_association *asoc;
10490 struct sctp_tmit_chunk *chk, *a_chk;
10491 struct sctp_sack_chunk *sack;
10492 struct sctp_nr_sack_chunk *nr_sack;
10493 struct sctp_gap_ack_block *gap_descriptor;
10494 const struct sack_track *selector;
10499 int limit_reached = 0;
10500 unsigned int i, siz, j;
10501 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10504 uint32_t highest_tsn;
10509 if (stcb->asoc.nrsack_supported == 1) {
10510 type = SCTP_NR_SELECTIVE_ACK;
10512 type = SCTP_SELECTIVE_ACK;
10515 asoc = &stcb->asoc;
10516 SCTP_TCB_LOCK_ASSERT(stcb);
10517 if (asoc->last_data_chunk_from == NULL) {
10518 /* Hmm we never received anything */
10521 sctp_slide_mapping_arrays(stcb);
10522 sctp_set_rwnd(stcb, asoc);
10523 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10524 if (chk->rec.chunk_id.id == type) {
10525 /* Hmm, found a sack already on queue, remove it */
10526 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10527 asoc->ctrl_queue_cnt--;
10530 sctp_m_freem(a_chk->data);
10531 a_chk->data = NULL;
10533 if (a_chk->whoTo) {
10534 sctp_free_remote_addr(a_chk->whoTo);
10535 a_chk->whoTo = NULL;
10540 if (a_chk == NULL) {
10541 sctp_alloc_a_chunk(stcb, a_chk);
10542 if (a_chk == NULL) {
10543 /* No memory so we drop the idea, and set a timer */
10544 if (stcb->asoc.delayed_ack) {
10545 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10546 stcb->sctp_ep, stcb, NULL,
10547 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10548 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10549 stcb->sctp_ep, stcb, NULL);
10551 stcb->asoc.send_sack = 1;
10555 a_chk->copy_by_ref = 0;
10556 a_chk->rec.chunk_id.id = type;
10557 a_chk->rec.chunk_id.can_take_data = 1;
10559 /* Clear our pkt counts */
10560 asoc->data_pkts_seen = 0;
10563 a_chk->asoc = asoc;
10564 a_chk->snd_count = 0;
10565 a_chk->send_size = 0; /* fill in later */
10566 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10567 a_chk->whoTo = NULL;
10569 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10571 * Ok, the destination for the SACK is unreachable, lets see if
10572 * we can select an alternate to asoc->last_data_chunk_from
10574 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10575 if (a_chk->whoTo == NULL) {
10576 /* Nope, no alternate */
10577 a_chk->whoTo = asoc->last_data_chunk_from;
10580 a_chk->whoTo = asoc->last_data_chunk_from;
10582 if (a_chk->whoTo) {
10583 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10585 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10586 highest_tsn = asoc->highest_tsn_inside_map;
10588 highest_tsn = asoc->highest_tsn_inside_nr_map;
10590 if (highest_tsn == asoc->cumulative_tsn) {
10592 if (type == SCTP_SELECTIVE_ACK) {
10593 space_req = sizeof(struct sctp_sack_chunk);
10595 space_req = sizeof(struct sctp_nr_sack_chunk);
10598 /* gaps get a cluster */
10599 space_req = MCLBYTES;
10601 /* Ok now lets formulate a MBUF with our sack */
10602 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10603 if ((a_chk->data == NULL) ||
10604 (a_chk->whoTo == NULL)) {
10605 /* rats, no mbuf memory */
10607 /* was a problem with the destination */
10608 sctp_m_freem(a_chk->data);
10609 a_chk->data = NULL;
10611 sctp_free_a_chunk(stcb, a_chk, so_locked);
10612 /* sa_ignore NO_NULL_CHK */
10613 if (stcb->asoc.delayed_ack) {
10614 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10615 stcb->sctp_ep, stcb, NULL,
10616 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10617 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10618 stcb->sctp_ep, stcb, NULL);
10620 stcb->asoc.send_sack = 1;
10624 /* ok, lets go through and fill it in */
10625 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10626 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10627 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10628 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10630 limit = mtod(a_chk->data, caddr_t);
10635 if ((asoc->sctp_cmt_on_off > 0) &&
10636 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10638 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10639 * received, then set high bit to 1, else 0. Reset
10642 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10643 asoc->cmt_dac_pkts_rcvd = 0;
10645 #ifdef SCTP_ASOCLOG_OF_TSNS
10646 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10647 stcb->asoc.cumack_log_atsnt++;
10648 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10649 stcb->asoc.cumack_log_atsnt = 0;
10652 /* reset the readers interpretation */
10653 stcb->freed_by_sorcv_sincelast = 0;
10655 if (type == SCTP_SELECTIVE_ACK) {
10656 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10658 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10659 if (highest_tsn > asoc->mapping_array_base_tsn) {
10660 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10662 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10666 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10667 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10668 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10669 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10671 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10675 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10678 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10680 if (((type == SCTP_SELECTIVE_ACK) &&
10681 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10682 ((type == SCTP_NR_SELECTIVE_ACK) &&
10683 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10684 /* we have a gap .. maybe */
10685 for (i = 0; i < siz; i++) {
10686 tsn_map = asoc->mapping_array[i];
10687 if (type == SCTP_SELECTIVE_ACK) {
10688 tsn_map |= asoc->nr_mapping_array[i];
10692 * Clear all bits corresponding to TSNs
10693 * smaller or equal to the cumulative TSN.
10695 tsn_map &= (~0U << (1 - offset));
10697 selector = &sack_array[tsn_map];
10698 if (mergeable && selector->right_edge) {
10700 * Backup, left and right edges were ok to
10706 if (selector->num_entries == 0)
10709 for (j = 0; j < selector->num_entries; j++) {
10710 if (mergeable && selector->right_edge) {
10712 * do a merge by NOT setting
10718 * no merge, set the left
10722 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10724 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10727 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10733 if (selector->left_edge) {
10737 if (limit_reached) {
10738 /* Reached the limit stop */
10744 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10745 (limit_reached == 0)) {
10749 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10750 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10752 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10755 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10758 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10760 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10761 /* we have a gap .. maybe */
10762 for (i = 0; i < siz; i++) {
10763 tsn_map = asoc->nr_mapping_array[i];
10766 * Clear all bits corresponding to
10767 * TSNs smaller or equal to the
10770 tsn_map &= (~0U << (1 - offset));
10772 selector = &sack_array[tsn_map];
10773 if (mergeable && selector->right_edge) {
10775 * Backup, left and right edges were
10778 num_nr_gap_blocks--;
10781 if (selector->num_entries == 0)
10784 for (j = 0; j < selector->num_entries; j++) {
10785 if (mergeable && selector->right_edge) {
10787 * do a merge by NOT
10794 * no merge, set the
10798 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10800 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10801 num_nr_gap_blocks++;
10803 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10809 if (selector->left_edge) {
10813 if (limit_reached) {
10814 /* Reached the limit stop */
10821 /* now we must add any dups we are going to report. */
10822 if ((limit_reached == 0) && (asoc->numduptsns)) {
10823 dup = (uint32_t *) gap_descriptor;
10824 for (i = 0; i < asoc->numduptsns; i++) {
10825 *dup = htonl(asoc->dup_tsns[i]);
10828 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10833 asoc->numduptsns = 0;
10836 * now that the chunk is prepared queue it to the control chunk
10839 if (type == SCTP_SELECTIVE_ACK) {
10840 a_chk->send_size = (uint16_t) (sizeof(struct sctp_sack_chunk) +
10841 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10842 num_dups * sizeof(int32_t));
10843 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10844 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10845 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10846 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10847 sack->sack.num_dup_tsns = htons(num_dups);
10848 sack->ch.chunk_type = type;
10849 sack->ch.chunk_flags = flags;
10850 sack->ch.chunk_length = htons(a_chk->send_size);
10852 a_chk->send_size = (uint16_t) (sizeof(struct sctp_nr_sack_chunk) +
10853 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10854 num_dups * sizeof(int32_t));
10855 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10856 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10857 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10858 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10859 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10860 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10861 nr_sack->nr_sack.reserved = 0;
10862 nr_sack->ch.chunk_type = type;
10863 nr_sack->ch.chunk_flags = flags;
10864 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10866 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10867 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10868 asoc->ctrl_queue_cnt++;
10869 asoc->send_sack = 0;
10870 SCTP_STAT_INCR(sctps_sendsacks);
10875 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10876 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10881 struct mbuf *m_abort, *m, *m_last;
10882 struct mbuf *m_out, *m_end = NULL;
10883 struct sctp_abort_chunk *abort;
10884 struct sctp_auth_chunk *auth = NULL;
10885 struct sctp_nets *net;
10887 uint32_t auth_offset = 0;
10888 uint16_t cause_len, chunk_len, padding_len;
10890 SCTP_TCB_LOCK_ASSERT(stcb);
10892 * Add an AUTH chunk, if chunk requires it and save the offset into
10893 * the chain for AUTH
10895 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10896 stcb->asoc.peer_auth_chunks)) {
10897 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10898 stcb, SCTP_ABORT_ASSOCIATION);
10899 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10903 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10904 if (m_abort == NULL) {
10906 sctp_m_freem(m_out);
10909 sctp_m_freem(operr);
10913 /* link in any error */
10914 SCTP_BUF_NEXT(m_abort) = operr;
10917 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10918 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10919 if (SCTP_BUF_NEXT(m) == NULL) {
10923 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10924 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10925 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10926 if (m_out == NULL) {
10927 /* NO Auth chunk prepended, so reserve space in front */
10928 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10931 /* Put AUTH chunk at the front of the chain */
10932 SCTP_BUF_NEXT(m_end) = m_abort;
10934 if (stcb->asoc.alternate) {
10935 net = stcb->asoc.alternate;
10937 net = stcb->asoc.primary_destination;
10939 /* Fill in the ABORT chunk header. */
10940 abort = mtod(m_abort, struct sctp_abort_chunk *);
10941 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10942 if (stcb->asoc.peer_vtag == 0) {
10943 /* This happens iff the assoc is in COOKIE-WAIT state. */
10944 vtag = stcb->asoc.my_vtag;
10945 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10947 vtag = stcb->asoc.peer_vtag;
10948 abort->ch.chunk_flags = 0;
10950 abort->ch.chunk_length = htons(chunk_len);
10951 /* Add padding, if necessary. */
10952 if (padding_len > 0) {
10953 if ((m_last == NULL) ||
10954 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10955 sctp_m_freem(m_out);
10959 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10960 (struct sockaddr *)&net->ro._l_addr,
10961 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10962 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10963 stcb->asoc.primary_destination->port, NULL,
10966 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10970 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10971 struct sctp_nets *net,
10974 /* formulate and SEND a SHUTDOWN-COMPLETE */
10975 struct mbuf *m_shutdown_comp;
10976 struct sctp_shutdown_complete_chunk *shutdown_complete;
10980 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10981 if (m_shutdown_comp == NULL) {
10985 if (reflect_vtag) {
10986 flags = SCTP_HAD_NO_TCB;
10987 vtag = stcb->asoc.my_vtag;
10990 vtag = stcb->asoc.peer_vtag;
10992 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10993 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10994 shutdown_complete->ch.chunk_flags = flags;
10995 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10996 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10997 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10998 (struct sockaddr *)&net->ro._l_addr,
10999 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11000 stcb->sctp_ep->sctp_lport, stcb->rport,
11004 SCTP_SO_NOT_LOCKED);
11005 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11010 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11011 struct sctphdr *sh, uint32_t vtag,
11012 uint8_t type, struct mbuf *cause,
11013 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11014 uint32_t vrf_id, uint16_t port)
11016 struct mbuf *o_pak;
11018 struct sctphdr *shout;
11019 struct sctp_chunkhdr *ch;
11021 #if defined(INET) || defined(INET6)
11022 struct udphdr *udp;
11026 int len, cause_len, padding_len;
11029 struct sockaddr_in *src_sin, *dst_sin;
11034 struct sockaddr_in6 *src_sin6, *dst_sin6;
11035 struct ip6_hdr *ip6;
11039 /* Compute the length of the cause and add final padding. */
11041 if (cause != NULL) {
11042 struct mbuf *m_at, *m_last = NULL;
11044 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11045 if (SCTP_BUF_NEXT(m_at) == NULL)
11047 cause_len += SCTP_BUF_LEN(m_at);
11049 padding_len = cause_len % 4;
11050 if (padding_len != 0) {
11051 padding_len = 4 - padding_len;
11053 if (padding_len != 0) {
11054 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11055 sctp_m_freem(cause);
11062 /* Get an mbuf for the header. */
11063 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11064 switch (dst->sa_family) {
11067 len += sizeof(struct ip);
11072 len += sizeof(struct ip6_hdr);
11078 #if defined(INET) || defined(INET6)
11080 len += sizeof(struct udphdr);
11083 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11084 if (mout == NULL) {
11086 sctp_m_freem(cause);
11090 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11091 SCTP_BUF_LEN(mout) = len;
11092 SCTP_BUF_NEXT(mout) = cause;
11093 M_SETFIB(mout, fibnum);
11094 mout->m_pkthdr.flowid = mflowid;
11095 M_HASHTYPE_SET(mout, mflowtype);
11102 switch (dst->sa_family) {
11105 src_sin = (struct sockaddr_in *)src;
11106 dst_sin = (struct sockaddr_in *)dst;
11107 ip = mtod(mout, struct ip *);
11108 ip->ip_v = IPVERSION;
11109 ip->ip_hl = (sizeof(struct ip) >> 2);
11113 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11115 ip->ip_p = IPPROTO_UDP;
11117 ip->ip_p = IPPROTO_SCTP;
11119 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11120 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11122 len = sizeof(struct ip);
11123 shout = (struct sctphdr *)((caddr_t)ip + len);
11128 src_sin6 = (struct sockaddr_in6 *)src;
11129 dst_sin6 = (struct sockaddr_in6 *)dst;
11130 ip6 = mtod(mout, struct ip6_hdr *);
11131 ip6->ip6_flow = htonl(0x60000000);
11132 if (V_ip6_auto_flowlabel) {
11133 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11135 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11137 ip6->ip6_nxt = IPPROTO_UDP;
11139 ip6->ip6_nxt = IPPROTO_SCTP;
11141 ip6->ip6_src = dst_sin6->sin6_addr;
11142 ip6->ip6_dst = src_sin6->sin6_addr;
11143 len = sizeof(struct ip6_hdr);
11144 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11149 shout = mtod(mout, struct sctphdr *);
11152 #if defined(INET) || defined(INET6)
11154 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11155 sctp_m_freem(mout);
11158 udp = (struct udphdr *)shout;
11159 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11160 udp->uh_dport = port;
11162 udp->uh_ulen = htons((uint16_t) (sizeof(struct udphdr) +
11163 sizeof(struct sctphdr) +
11164 sizeof(struct sctp_chunkhdr) +
11165 cause_len + padding_len));
11166 len += sizeof(struct udphdr);
11167 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11172 shout->src_port = sh->dest_port;
11173 shout->dest_port = sh->src_port;
11174 shout->checksum = 0;
11176 shout->v_tag = htonl(vtag);
11178 shout->v_tag = sh->v_tag;
11180 len += sizeof(struct sctphdr);
11181 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11182 ch->chunk_type = type;
11184 ch->chunk_flags = 0;
11186 ch->chunk_flags = SCTP_HAD_NO_TCB;
11188 ch->chunk_length = htons((uint16_t) (sizeof(struct sctp_chunkhdr) + cause_len));
11189 len += sizeof(struct sctp_chunkhdr);
11190 len += cause_len + padding_len;
11192 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11193 sctp_m_freem(mout);
11196 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11197 switch (dst->sa_family) {
11202 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11207 ip->ip_len = htons(len);
11209 #if defined(SCTP_WITH_NO_CSUM)
11210 SCTP_STAT_INCR(sctps_sendnocrc);
11212 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11213 SCTP_STAT_INCR(sctps_sendswcrc);
11216 SCTP_ENABLE_UDP_CSUM(o_pak);
11219 #if defined(SCTP_WITH_NO_CSUM)
11220 SCTP_STAT_INCR(sctps_sendnocrc);
11222 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11223 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11224 SCTP_STAT_INCR(sctps_sendhwcrc);
11227 #ifdef SCTP_PACKET_LOGGING
11228 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11229 sctp_packet_log(o_pak);
11232 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11237 ip6->ip6_plen = (uint16_t) (len - sizeof(struct ip6_hdr));
11239 #if defined(SCTP_WITH_NO_CSUM)
11240 SCTP_STAT_INCR(sctps_sendnocrc);
11242 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11243 SCTP_STAT_INCR(sctps_sendswcrc);
11245 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11246 udp->uh_sum = 0xffff;
11249 #if defined(SCTP_WITH_NO_CSUM)
11250 SCTP_STAT_INCR(sctps_sendnocrc);
11252 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11253 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11254 SCTP_STAT_INCR(sctps_sendhwcrc);
11257 #ifdef SCTP_PACKET_LOGGING
11258 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11259 sctp_packet_log(o_pak);
11262 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11266 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11268 sctp_m_freem(mout);
11269 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11272 SCTP_STAT_INCR(sctps_sendpackets);
11273 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11274 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11279 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11280 struct sctphdr *sh,
11281 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11282 uint32_t vrf_id, uint16_t port)
11284 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11285 mflowtype, mflowid, fibnum,
11290 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11291 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11296 struct sctp_tmit_chunk *chk;
11297 struct sctp_heartbeat_chunk *hb;
11298 struct timeval now;
11300 SCTP_TCB_LOCK_ASSERT(stcb);
11304 (void)SCTP_GETTIME_TIMEVAL(&now);
11305 switch (net->ro._l_addr.sa.sa_family) {
11317 sctp_alloc_a_chunk(stcb, chk);
11319 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11322 chk->copy_by_ref = 0;
11323 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11324 chk->rec.chunk_id.can_take_data = 1;
11326 chk->asoc = &stcb->asoc;
11327 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11329 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11330 if (chk->data == NULL) {
11331 sctp_free_a_chunk(stcb, chk, so_locked);
11334 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11335 SCTP_BUF_LEN(chk->data) = chk->send_size;
11336 chk->sent = SCTP_DATAGRAM_UNSENT;
11337 chk->snd_count = 0;
11339 atomic_add_int(&chk->whoTo->ref_count, 1);
11340 /* Now we have a mbuf that we can fill in with the details */
11341 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11342 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11343 /* fill out chunk header */
11344 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11345 hb->ch.chunk_flags = 0;
11346 hb->ch.chunk_length = htons(chk->send_size);
11347 /* Fill out hb parameter */
11348 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11349 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11350 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11351 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11352 /* Did our user request this one, put it in */
11353 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11354 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11355 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11357 * we only take from the entropy pool if the address is not
11360 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11361 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11363 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11364 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11366 switch (net->ro._l_addr.sa.sa_family) {
11369 memcpy(hb->heartbeat.hb_info.address,
11370 &net->ro._l_addr.sin.sin_addr,
11371 sizeof(net->ro._l_addr.sin.sin_addr));
11376 memcpy(hb->heartbeat.hb_info.address,
11377 &net->ro._l_addr.sin6.sin6_addr,
11378 sizeof(net->ro._l_addr.sin6.sin6_addr));
11383 sctp_m_freem(chk->data);
11386 sctp_free_a_chunk(stcb, chk, so_locked);
11390 net->hb_responded = 0;
11391 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11392 stcb->asoc.ctrl_queue_cnt++;
11393 SCTP_STAT_INCR(sctps_sendheartbeat);
11398 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11401 struct sctp_association *asoc;
11402 struct sctp_ecne_chunk *ecne;
11403 struct sctp_tmit_chunk *chk;
11408 asoc = &stcb->asoc;
11409 SCTP_TCB_LOCK_ASSERT(stcb);
11410 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11411 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11412 /* found a previous ECN_ECHO update it if needed */
11413 uint32_t cnt, ctsn;
11415 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11416 ctsn = ntohl(ecne->tsn);
11417 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11418 ecne->tsn = htonl(high_tsn);
11419 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11421 cnt = ntohl(ecne->num_pkts_since_cwr);
11423 ecne->num_pkts_since_cwr = htonl(cnt);
11427 /* nope could not find one to update so we must build one */
11428 sctp_alloc_a_chunk(stcb, chk);
11432 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11433 chk->copy_by_ref = 0;
11434 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11435 chk->rec.chunk_id.can_take_data = 0;
11437 chk->asoc = &stcb->asoc;
11438 chk->send_size = sizeof(struct sctp_ecne_chunk);
11439 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11440 if (chk->data == NULL) {
11441 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11444 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11445 SCTP_BUF_LEN(chk->data) = chk->send_size;
11446 chk->sent = SCTP_DATAGRAM_UNSENT;
11447 chk->snd_count = 0;
11449 atomic_add_int(&chk->whoTo->ref_count, 1);
11451 stcb->asoc.ecn_echo_cnt_onq++;
11452 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11453 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11454 ecne->ch.chunk_flags = 0;
11455 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11456 ecne->tsn = htonl(high_tsn);
11457 ecne->num_pkts_since_cwr = htonl(1);
11458 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11459 asoc->ctrl_queue_cnt++;
11463 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11464 struct mbuf *m, int len, int iphlen, int bad_crc)
11466 struct sctp_association *asoc;
11467 struct sctp_pktdrop_chunk *drp;
11468 struct sctp_tmit_chunk *chk;
11474 struct sctp_chunkhdr *ch, chunk_buf;
11475 unsigned int chk_length;
11480 asoc = &stcb->asoc;
11481 SCTP_TCB_LOCK_ASSERT(stcb);
11482 if (asoc->pktdrop_supported == 0) {
11484 * peer must declare support before I send one.
11488 if (stcb->sctp_socket == NULL) {
11491 sctp_alloc_a_chunk(stcb, chk);
11495 chk->copy_by_ref = 0;
11496 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11497 chk->rec.chunk_id.can_take_data = 1;
11500 chk->send_size = len;
11501 /* Validate that we do not have an ABORT in here. */
11502 offset = iphlen + sizeof(struct sctphdr);
11503 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11504 sizeof(*ch), (uint8_t *) & chunk_buf);
11505 while (ch != NULL) {
11506 chk_length = ntohs(ch->chunk_length);
11507 if (chk_length < sizeof(*ch)) {
11508 /* break to abort land */
11511 switch (ch->chunk_type) {
11512 case SCTP_PACKET_DROPPED:
11513 case SCTP_ABORT_ASSOCIATION:
11514 case SCTP_INITIATION_ACK:
11516 * We don't respond with an PKT-DROP to an ABORT
11517 * or PKT-DROP. We also do not respond to an
11518 * INIT-ACK, because we can't know if the initiation
11519 * tag is correct or not.
11521 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11526 offset += SCTP_SIZE32(chk_length);
11527 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11528 sizeof(*ch), (uint8_t *) & chunk_buf);
11531 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11532 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11534 * only send 1 mtu worth, trim off the excess on the end.
11537 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11540 chk->asoc = &stcb->asoc;
11541 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11542 if (chk->data == NULL) {
11544 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11547 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11548 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11550 sctp_m_freem(chk->data);
11554 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11555 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11556 chk->book_size_scale = 0;
11558 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11559 drp->trunc_len = htons(fullsz);
11561 * Len is already adjusted to size minus overhead above take
11562 * out the pkt_drop chunk itself from it.
11564 chk->send_size = (uint16_t) (len - sizeof(struct sctp_pktdrop_chunk));
11565 len = chk->send_size;
11567 /* no truncation needed */
11568 drp->ch.chunk_flags = 0;
11569 drp->trunc_len = htons(0);
11572 drp->ch.chunk_flags |= SCTP_BADCRC;
11574 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11575 SCTP_BUF_LEN(chk->data) = chk->send_size;
11576 chk->sent = SCTP_DATAGRAM_UNSENT;
11577 chk->snd_count = 0;
11579 /* we should hit here */
11581 atomic_add_int(&chk->whoTo->ref_count, 1);
11585 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11586 drp->ch.chunk_length = htons(chk->send_size);
11587 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11591 drp->bottle_bw = htonl(spc);
11592 if (asoc->my_rwnd) {
11593 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11594 asoc->size_on_all_streams +
11595 asoc->my_rwnd_control_len +
11596 stcb->sctp_socket->so_rcv.sb_cc);
11599 * If my rwnd is 0, possibly from mbuf depletion as well as
11600 * space used, tell the peer there is NO space aka onq == bw
11602 drp->current_onq = htonl(spc);
11606 m_copydata(m, iphlen, len, (caddr_t)datap);
11607 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11608 asoc->ctrl_queue_cnt++;
11612 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11614 struct sctp_association *asoc;
11615 struct sctp_cwr_chunk *cwr;
11616 struct sctp_tmit_chunk *chk;
11618 SCTP_TCB_LOCK_ASSERT(stcb);
11622 asoc = &stcb->asoc;
11623 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11624 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11626 * found a previous CWR queued to same destination
11627 * update it if needed
11631 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11632 ctsn = ntohl(cwr->tsn);
11633 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11634 cwr->tsn = htonl(high_tsn);
11636 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11637 /* Make sure override is carried */
11638 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11643 sctp_alloc_a_chunk(stcb, chk);
11647 chk->copy_by_ref = 0;
11648 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11649 chk->rec.chunk_id.can_take_data = 1;
11651 chk->asoc = &stcb->asoc;
11652 chk->send_size = sizeof(struct sctp_cwr_chunk);
11653 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11654 if (chk->data == NULL) {
11655 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11658 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11659 SCTP_BUF_LEN(chk->data) = chk->send_size;
11660 chk->sent = SCTP_DATAGRAM_UNSENT;
11661 chk->snd_count = 0;
11663 atomic_add_int(&chk->whoTo->ref_count, 1);
11664 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11665 cwr->ch.chunk_type = SCTP_ECN_CWR;
11666 cwr->ch.chunk_flags = override;
11667 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11668 cwr->tsn = htonl(high_tsn);
11669 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11670 asoc->ctrl_queue_cnt++;
11674 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11675 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11677 uint16_t len, old_len, i;
11678 struct sctp_stream_reset_out_request *req_out;
11679 struct sctp_chunkhdr *ch;
11681 int number_entries = 0;
11683 ch = mtod(chk->data, struct sctp_chunkhdr *);
11684 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11685 /* get to new offset for the param. */
11686 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11687 /* now how long will this param be? */
11688 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11689 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11690 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11691 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11695 if (number_entries == 0) {
11698 if (number_entries == stcb->asoc.streamoutcnt) {
11699 number_entries = 0;
11701 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11702 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11704 len = (uint16_t) (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11705 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11706 req_out->ph.param_length = htons(len);
11707 req_out->request_seq = htonl(seq);
11708 req_out->response_seq = htonl(resp_seq);
11709 req_out->send_reset_at_tsn = htonl(last_sent);
11711 if (number_entries) {
11712 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11713 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11714 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11715 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11716 req_out->list_of_streams[at] = htons(i);
11718 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11719 if (at >= number_entries) {
11725 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11726 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11729 if (SCTP_SIZE32(len) > len) {
11731 * Need to worry about the pad we may end up adding to the
11732 * end. This is easy since the struct is either aligned to 4
11733 * bytes or 2 bytes off.
11735 req_out->list_of_streams[number_entries] = 0;
11737 /* now fix the chunk length */
11738 ch->chunk_length = htons(len + old_len);
11739 chk->book_size = len + old_len;
11740 chk->book_size_scale = 0;
11741 chk->send_size = SCTP_SIZE32(chk->book_size);
11742 SCTP_BUF_LEN(chk->data) = chk->send_size;
11747 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11748 int number_entries, uint16_t * list,
11751 uint16_t len, old_len, i;
11752 struct sctp_stream_reset_in_request *req_in;
11753 struct sctp_chunkhdr *ch;
11755 ch = mtod(chk->data, struct sctp_chunkhdr *);
11756 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11758 /* get to new offset for the param. */
11759 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11760 /* now how long will this param be? */
11761 len = (uint16_t) (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11762 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11763 req_in->ph.param_length = htons(len);
11764 req_in->request_seq = htonl(seq);
11765 if (number_entries) {
11766 for (i = 0; i < number_entries; i++) {
11767 req_in->list_of_streams[i] = htons(list[i]);
11770 if (SCTP_SIZE32(len) > len) {
11772 * Need to worry about the pad we may end up adding to the
11773 * end. This is easy since the struct is either aligned to 4
11774 * bytes or 2 bytes off.
11776 req_in->list_of_streams[number_entries] = 0;
11778 /* now fix the chunk length */
11779 ch->chunk_length = htons(len + old_len);
11780 chk->book_size = len + old_len;
11781 chk->book_size_scale = 0;
11782 chk->send_size = SCTP_SIZE32(chk->book_size);
11783 SCTP_BUF_LEN(chk->data) = chk->send_size;
11788 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11791 uint16_t len, old_len;
11792 struct sctp_stream_reset_tsn_request *req_tsn;
11793 struct sctp_chunkhdr *ch;
11795 ch = mtod(chk->data, struct sctp_chunkhdr *);
11796 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11798 /* get to new offset for the param. */
11799 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11800 /* now how long will this param be? */
11801 len = sizeof(struct sctp_stream_reset_tsn_request);
11802 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11803 req_tsn->ph.param_length = htons(len);
11804 req_tsn->request_seq = htonl(seq);
11806 /* now fix the chunk length */
11807 ch->chunk_length = htons(len + old_len);
11808 chk->send_size = len + old_len;
11809 chk->book_size = SCTP_SIZE32(chk->send_size);
11810 chk->book_size_scale = 0;
11811 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11816 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11817 uint32_t resp_seq, uint32_t result)
11819 uint16_t len, old_len;
11820 struct sctp_stream_reset_response *resp;
11821 struct sctp_chunkhdr *ch;
11823 ch = mtod(chk->data, struct sctp_chunkhdr *);
11824 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11826 /* get to new offset for the param. */
11827 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11828 /* now how long will this param be? */
11829 len = sizeof(struct sctp_stream_reset_response);
11830 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11831 resp->ph.param_length = htons(len);
11832 resp->response_seq = htonl(resp_seq);
11833 resp->result = ntohl(result);
11835 /* now fix the chunk length */
11836 ch->chunk_length = htons(len + old_len);
11837 chk->book_size = len + old_len;
11838 chk->book_size_scale = 0;
11839 chk->send_size = SCTP_SIZE32(chk->book_size);
11840 SCTP_BUF_LEN(chk->data) = chk->send_size;
11845 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11846 struct sctp_stream_reset_list *ent,
11849 struct sctp_association *asoc;
11850 struct sctp_tmit_chunk *chk;
11851 struct sctp_chunkhdr *ch;
11853 asoc = &stcb->asoc;
11856 * Reset our last reset action to the new one IP -> response
11857 * (PERFORMED probably). This assures that if we fail to send, a
11858 * retran from the peer will get the new response.
11860 asoc->last_reset_action[0] = response;
11861 if (asoc->stream_reset_outstanding) {
11864 sctp_alloc_a_chunk(stcb, chk);
11866 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11869 chk->copy_by_ref = 0;
11870 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11871 chk->rec.chunk_id.can_take_data = 0;
11873 chk->asoc = &stcb->asoc;
11874 chk->book_size = sizeof(struct sctp_chunkhdr);
11875 chk->send_size = SCTP_SIZE32(chk->book_size);
11876 chk->book_size_scale = 0;
11877 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11878 if (chk->data == NULL) {
11879 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11880 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11883 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11884 /* setup chunk parameters */
11885 chk->sent = SCTP_DATAGRAM_UNSENT;
11886 chk->snd_count = 0;
11887 if (stcb->asoc.alternate) {
11888 chk->whoTo = stcb->asoc.alternate;
11890 chk->whoTo = stcb->asoc.primary_destination;
11892 ch = mtod(chk->data, struct sctp_chunkhdr *);
11893 ch->chunk_type = SCTP_STREAM_RESET;
11894 ch->chunk_flags = 0;
11895 ch->chunk_length = htons(chk->book_size);
11896 atomic_add_int(&chk->whoTo->ref_count, 1);
11897 SCTP_BUF_LEN(chk->data) = chk->send_size;
11898 sctp_add_stream_reset_result(chk, ent->seq, response);
11899 /* insert the chunk for sending */
11900 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11903 asoc->ctrl_queue_cnt++;
11907 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11908 uint32_t resp_seq, uint32_t result,
11909 uint32_t send_una, uint32_t recv_next)
11911 uint16_t len, old_len;
11912 struct sctp_stream_reset_response_tsn *resp;
11913 struct sctp_chunkhdr *ch;
11915 ch = mtod(chk->data, struct sctp_chunkhdr *);
11916 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11918 /* get to new offset for the param. */
11919 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11920 /* now how long will this param be? */
11921 len = sizeof(struct sctp_stream_reset_response_tsn);
11922 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11923 resp->ph.param_length = htons(len);
11924 resp->response_seq = htonl(resp_seq);
11925 resp->result = htonl(result);
11926 resp->senders_next_tsn = htonl(send_una);
11927 resp->receivers_next_tsn = htonl(recv_next);
11929 /* now fix the chunk length */
11930 ch->chunk_length = htons(len + old_len);
11931 chk->book_size = len + old_len;
11932 chk->send_size = SCTP_SIZE32(chk->book_size);
11933 chk->book_size_scale = 0;
11934 SCTP_BUF_LEN(chk->data) = chk->send_size;
11939 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11943 uint16_t len, old_len;
11944 struct sctp_chunkhdr *ch;
11945 struct sctp_stream_reset_add_strm *addstr;
11947 ch = mtod(chk->data, struct sctp_chunkhdr *);
11948 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11950 /* get to new offset for the param. */
11951 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11952 /* now how long will this param be? */
11953 len = sizeof(struct sctp_stream_reset_add_strm);
11956 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11957 addstr->ph.param_length = htons(len);
11958 addstr->request_seq = htonl(seq);
11959 addstr->number_of_streams = htons(adding);
11960 addstr->reserved = 0;
11962 /* now fix the chunk length */
11963 ch->chunk_length = htons(len + old_len);
11964 chk->send_size = len + old_len;
11965 chk->book_size = SCTP_SIZE32(chk->send_size);
11966 chk->book_size_scale = 0;
11967 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11972 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11976 uint16_t len, old_len;
11977 struct sctp_chunkhdr *ch;
11978 struct sctp_stream_reset_add_strm *addstr;
11980 ch = mtod(chk->data, struct sctp_chunkhdr *);
11981 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11983 /* get to new offset for the param. */
11984 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11985 /* now how long will this param be? */
11986 len = sizeof(struct sctp_stream_reset_add_strm);
11988 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11989 addstr->ph.param_length = htons(len);
11990 addstr->request_seq = htonl(seq);
11991 addstr->number_of_streams = htons(adding);
11992 addstr->reserved = 0;
11994 /* now fix the chunk length */
11995 ch->chunk_length = htons(len + old_len);
11996 chk->send_size = len + old_len;
11997 chk->book_size = SCTP_SIZE32(chk->send_size);
11998 chk->book_size_scale = 0;
11999 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12004 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12006 struct sctp_association *asoc;
12007 struct sctp_tmit_chunk *chk;
12008 struct sctp_chunkhdr *ch;
12011 asoc = &stcb->asoc;
12012 asoc->trigger_reset = 0;
12013 if (asoc->stream_reset_outstanding) {
12016 sctp_alloc_a_chunk(stcb, chk);
12018 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12021 chk->copy_by_ref = 0;
12022 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12023 chk->rec.chunk_id.can_take_data = 0;
12025 chk->asoc = &stcb->asoc;
12026 chk->book_size = sizeof(struct sctp_chunkhdr);
12027 chk->send_size = SCTP_SIZE32(chk->book_size);
12028 chk->book_size_scale = 0;
12029 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12030 if (chk->data == NULL) {
12031 sctp_free_a_chunk(stcb, chk, so_locked);
12032 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12035 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12037 /* setup chunk parameters */
12038 chk->sent = SCTP_DATAGRAM_UNSENT;
12039 chk->snd_count = 0;
12040 if (stcb->asoc.alternate) {
12041 chk->whoTo = stcb->asoc.alternate;
12043 chk->whoTo = stcb->asoc.primary_destination;
12045 ch = mtod(chk->data, struct sctp_chunkhdr *);
12046 ch->chunk_type = SCTP_STREAM_RESET;
12047 ch->chunk_flags = 0;
12048 ch->chunk_length = htons(chk->book_size);
12049 atomic_add_int(&chk->whoTo->ref_count, 1);
12050 SCTP_BUF_LEN(chk->data) = chk->send_size;
12051 seq = stcb->asoc.str_reset_seq_out;
12052 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12054 asoc->stream_reset_outstanding++;
12056 m_freem(chk->data);
12058 sctp_free_a_chunk(stcb, chk, so_locked);
12061 asoc->str_reset = chk;
12062 /* insert the chunk for sending */
12063 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12066 asoc->ctrl_queue_cnt++;
12068 if (stcb->asoc.send_sack) {
12069 sctp_send_sack(stcb, so_locked);
12071 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12076 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12077 uint16_t number_entries, uint16_t * list,
12078 uint8_t send_in_req,
12079 uint8_t send_tsn_req,
12080 uint8_t add_stream,
12082 uint16_t adding_i, uint8_t peer_asked)
12084 struct sctp_association *asoc;
12085 struct sctp_tmit_chunk *chk;
12086 struct sctp_chunkhdr *ch;
12087 int can_send_out_req = 0;
12090 asoc = &stcb->asoc;
12091 if (asoc->stream_reset_outstanding) {
12093 * Already one pending, must get ACK back to clear the flag.
12095 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12098 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12099 (add_stream == 0)) {
12100 /* nothing to do */
12101 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12104 if (send_tsn_req && send_in_req) {
12105 /* error, can't do that */
12106 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12108 } else if (send_in_req) {
12109 can_send_out_req = 1;
12111 if (number_entries > (MCLBYTES -
12112 SCTP_MIN_OVERHEAD -
12113 sizeof(struct sctp_chunkhdr) -
12114 sizeof(struct sctp_stream_reset_out_request)) /
12115 sizeof(uint16_t)) {
12116 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12119 sctp_alloc_a_chunk(stcb, chk);
12121 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12124 chk->copy_by_ref = 0;
12125 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12126 chk->rec.chunk_id.can_take_data = 0;
12128 chk->asoc = &stcb->asoc;
12129 chk->book_size = sizeof(struct sctp_chunkhdr);
12130 chk->send_size = SCTP_SIZE32(chk->book_size);
12131 chk->book_size_scale = 0;
12133 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12134 if (chk->data == NULL) {
12135 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12136 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12139 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12141 /* setup chunk parameters */
12142 chk->sent = SCTP_DATAGRAM_UNSENT;
12143 chk->snd_count = 0;
12144 if (stcb->asoc.alternate) {
12145 chk->whoTo = stcb->asoc.alternate;
12147 chk->whoTo = stcb->asoc.primary_destination;
12149 atomic_add_int(&chk->whoTo->ref_count, 1);
12150 ch = mtod(chk->data, struct sctp_chunkhdr *);
12151 ch->chunk_type = SCTP_STREAM_RESET;
12152 ch->chunk_flags = 0;
12153 ch->chunk_length = htons(chk->book_size);
12154 SCTP_BUF_LEN(chk->data) = chk->send_size;
12156 seq = stcb->asoc.str_reset_seq_out;
12157 if (can_send_out_req) {
12160 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12163 asoc->stream_reset_outstanding++;
12166 if ((add_stream & 1) &&
12167 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12168 /* Need to allocate more */
12169 struct sctp_stream_out *oldstream;
12170 struct sctp_stream_queue_pending *sp, *nsp;
12173 #if defined(SCTP_DETAILED_STR_STATS)
12178 oldstream = stcb->asoc.strmout;
12179 /* get some more */
12180 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12181 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12183 if (stcb->asoc.strmout == NULL) {
12186 stcb->asoc.strmout = oldstream;
12187 /* Turn off the bit */
12188 x = add_stream & 0xfe;
12193 * Ok now we proceed with copying the old out stuff and
12194 * initializing the new stuff.
12196 SCTP_TCB_SEND_LOCK(stcb);
12197 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12198 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12199 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12200 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12201 stcb->asoc.strmout[i].next_mid_ordered = oldstream[i].next_mid_ordered;
12202 stcb->asoc.strmout[i].next_mid_unordered = oldstream[i].next_mid_unordered;
12203 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12204 stcb->asoc.strmout[i].stream_no = i;
12205 stcb->asoc.strmout[i].state = oldstream[i].state;
12206 /* FIX ME FIX ME */
12208 * This should be a SS_COPY operation FIX ME STREAM
12211 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], &oldstream[i]);
12212 /* now anything on those queues? */
12213 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12214 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12215 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12219 /* now the new streams */
12220 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12221 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12222 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12223 stcb->asoc.strmout[i].chunks_on_queues = 0;
12224 #if defined(SCTP_DETAILED_STR_STATS)
12225 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12226 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12227 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12230 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12231 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12233 stcb->asoc.strmout[i].next_mid_ordered = 0;
12234 stcb->asoc.strmout[i].next_mid_unordered = 0;
12235 stcb->asoc.strmout[i].stream_no = i;
12236 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12237 stcb->asoc.ss_functions.sctp_ss_init_stream(stcb, &stcb->asoc.strmout[i], NULL);
12238 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12240 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12241 SCTP_FREE(oldstream, SCTP_M_STRMO);
12242 SCTP_TCB_SEND_UNLOCK(stcb);
12245 if ((add_stream & 1) && (adding_o > 0)) {
12246 asoc->strm_pending_add_size = adding_o;
12247 asoc->peer_req_out = peer_asked;
12248 sctp_add_an_out_stream(chk, seq, adding_o);
12250 asoc->stream_reset_outstanding++;
12252 if ((add_stream & 2) && (adding_i > 0)) {
12253 sctp_add_an_in_stream(chk, seq, adding_i);
12255 asoc->stream_reset_outstanding++;
12258 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12260 asoc->stream_reset_outstanding++;
12262 if (send_tsn_req) {
12263 sctp_add_stream_reset_tsn(chk, seq);
12264 asoc->stream_reset_outstanding++;
12266 asoc->str_reset = chk;
12267 /* insert the chunk for sending */
12268 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12271 asoc->ctrl_queue_cnt++;
12272 if (stcb->asoc.send_sack) {
12273 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12275 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12280 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12281 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12282 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12283 uint32_t vrf_id, uint16_t port)
12285 /* Don't respond to an ABORT with an ABORT. */
12286 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12288 sctp_m_freem(cause);
12291 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12292 mflowtype, mflowid, fibnum,
12298 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12299 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12300 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12301 uint32_t vrf_id, uint16_t port)
12303 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12304 mflowtype, mflowid, fibnum,
12309 static struct mbuf *
12310 sctp_copy_resume(struct uio *uio,
12312 int user_marks_eor,
12315 struct mbuf **new_tail)
12319 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12320 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12322 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12325 *sndout = m_length(m, NULL);
12326 *new_tail = m_last(m);
12332 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12336 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12338 if (sp->data == NULL) {
12339 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12342 sp->tail_mbuf = m_last(sp->data);
12348 static struct sctp_stream_queue_pending *
12349 sctp_copy_it_in(struct sctp_tcb *stcb,
12350 struct sctp_association *asoc,
12351 struct sctp_sndrcvinfo *srcv,
12353 struct sctp_nets *net,
12355 int user_marks_eor,
12359 * This routine must be very careful in its work. Protocol
12360 * processing is up and running so care must be taken to spl...()
12361 * when you need to do something that may effect the stcb/asoc. The
12362 * sb is locked however. When data is copied the protocol processing
12363 * should be enabled since this is a slower operation...
12365 struct sctp_stream_queue_pending *sp = NULL;
12369 /* Now can we send this? */
12370 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12371 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12372 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12373 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12374 /* got data while shutting down */
12375 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12376 *error = ECONNRESET;
12379 sctp_alloc_a_strmoq(stcb, sp);
12381 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12386 sp->sender_all_done = 0;
12387 sp->sinfo_flags = srcv->sinfo_flags;
12388 sp->timetolive = srcv->sinfo_timetolive;
12389 sp->ppid = srcv->sinfo_ppid;
12390 sp->context = srcv->sinfo_context;
12392 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12394 sp->stream = srcv->sinfo_stream;
12395 sp->length = (uint32_t) min(uio->uio_resid, max_send_len);
12396 if ((sp->length == (uint32_t) uio->uio_resid) &&
12397 ((user_marks_eor == 0) ||
12398 (srcv->sinfo_flags & SCTP_EOF) ||
12399 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12400 sp->msg_is_complete = 1;
12402 sp->msg_is_complete = 0;
12404 sp->sender_all_done = 0;
12405 sp->some_taken = 0;
12406 sp->put_last_out = 0;
12407 resv_in_first = sizeof(struct sctp_data_chunk);
12408 sp->data = sp->tail_mbuf = NULL;
12409 if (sp->length == 0) {
12413 if (srcv->sinfo_keynumber_valid) {
12414 sp->auth_keyid = srcv->sinfo_keynumber;
12416 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12418 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12419 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12420 sp->holds_key_ref = 1;
12422 *error = sctp_copy_one(sp, uio, resv_in_first);
12425 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12428 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12430 atomic_add_int(&sp->net->ref_count, 1);
12434 sctp_set_prsctp_policy(sp);
12442 sctp_sosend(struct socket *so,
12443 struct sockaddr *addr,
12446 struct mbuf *control,
12451 int error, use_sndinfo = 0;
12452 struct sctp_sndrcvinfo sndrcvninfo;
12453 struct sockaddr *addr_to_use;
12455 #if defined(INET) && defined(INET6)
12456 struct sockaddr_in sin;
12461 /* process cmsg snd/rcv info (maybe a assoc-id) */
12462 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12463 sizeof(sndrcvninfo))) {
12468 addr_to_use = addr;
12469 #if defined(INET) && defined(INET6)
12470 if ((addr) && (addr->sa_family == AF_INET6)) {
12471 struct sockaddr_in6 *sin6;
12473 sin6 = (struct sockaddr_in6 *)addr;
12474 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12475 in6_sin6_2_sin(&sin, sin6);
12476 addr_to_use = (struct sockaddr *)&sin;
12480 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12483 use_sndinfo ? &sndrcvninfo : NULL
12491 sctp_lower_sosend(struct socket *so,
12492 struct sockaddr *addr,
12494 struct mbuf *i_pak,
12495 struct mbuf *control,
12497 struct sctp_sndrcvinfo *srcv
12502 unsigned int sndlen = 0, max_len;
12504 struct mbuf *top = NULL;
12505 int queue_only = 0, queue_only_for_init = 0;
12506 int free_cnt_applied = 0;
12508 int now_filled = 0;
12509 unsigned int inqueue_bytes = 0;
12510 struct sctp_block_entry be;
12511 struct sctp_inpcb *inp;
12512 struct sctp_tcb *stcb = NULL;
12513 struct timeval now;
12514 struct sctp_nets *net;
12515 struct sctp_association *asoc;
12516 struct sctp_inpcb *t_inp;
12517 int user_marks_eor;
12518 int create_lock_applied = 0;
12519 int nagle_applies = 0;
12520 int some_on_control = 0;
12521 int got_all_of_the_send = 0;
12522 int hold_tcblock = 0;
12523 int non_blocking = 0;
12524 uint32_t local_add_more, local_soresv = 0;
12526 uint16_t sinfo_flags;
12527 sctp_assoc_t sinfo_assoc_id;
12534 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12536 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12539 SCTP_RELEASE_PKT(i_pak);
12543 if ((uio == NULL) && (i_pak == NULL)) {
12544 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12547 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12548 atomic_add_int(&inp->total_sends, 1);
12550 if (uio->uio_resid < 0) {
12551 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12554 sndlen = (unsigned int)uio->uio_resid;
12556 top = SCTP_HEADER_TO_CHAIN(i_pak);
12557 sndlen = SCTP_HEADER_LEN(i_pak);
12559 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12562 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12563 (inp->sctp_socket->so_qlimit)) {
12564 /* The listener can NOT send */
12565 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12570 * Pre-screen address, if one is given the sin-len
12571 * must be set correctly!
12574 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12576 switch (raddr->sa.sa_family) {
12579 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12580 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12584 port = raddr->sin.sin_port;
12589 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12590 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12594 port = raddr->sin6.sin6_port;
12598 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12599 error = EAFNOSUPPORT;
12606 sinfo_flags = srcv->sinfo_flags;
12607 sinfo_assoc_id = srcv->sinfo_assoc_id;
12608 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12609 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12610 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12614 if (srcv->sinfo_flags)
12615 SCTP_STAT_INCR(sctps_sends_with_flags);
12617 sinfo_flags = inp->def_send.sinfo_flags;
12618 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12620 if (sinfo_flags & SCTP_SENDALL) {
12621 /* its a sendall */
12622 error = sctp_sendall(inp, uio, top, srcv);
12626 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12627 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12631 /* now we must find the assoc */
12632 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12633 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12634 SCTP_INP_RLOCK(inp);
12635 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12637 SCTP_TCB_LOCK(stcb);
12640 SCTP_INP_RUNLOCK(inp);
12641 } else if (sinfo_assoc_id) {
12642 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12645 * Since we did not use findep we must
12646 * increment it, and if we don't find a tcb
12649 SCTP_INP_WLOCK(inp);
12650 SCTP_INP_INCR_REF(inp);
12651 SCTP_INP_WUNLOCK(inp);
12652 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12653 if (stcb == NULL) {
12654 SCTP_INP_WLOCK(inp);
12655 SCTP_INP_DECR_REF(inp);
12656 SCTP_INP_WUNLOCK(inp);
12661 if ((stcb == NULL) && (addr)) {
12662 /* Possible implicit send? */
12663 SCTP_ASOC_CREATE_LOCK(inp);
12664 create_lock_applied = 1;
12665 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12666 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12667 /* Should I really unlock ? */
12668 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12673 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12674 (addr->sa_family == AF_INET6)) {
12675 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12679 SCTP_INP_WLOCK(inp);
12680 SCTP_INP_INCR_REF(inp);
12681 SCTP_INP_WUNLOCK(inp);
12682 /* With the lock applied look again */
12683 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12684 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12685 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12687 if (stcb == NULL) {
12688 SCTP_INP_WLOCK(inp);
12689 SCTP_INP_DECR_REF(inp);
12690 SCTP_INP_WUNLOCK(inp);
12697 if (t_inp != inp) {
12698 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12703 if (stcb == NULL) {
12704 if (addr == NULL) {
12705 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12709 /* We must go ahead and start the INIT process */
12712 if ((sinfo_flags & SCTP_ABORT) ||
12713 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12715 * User asks to abort a non-existant assoc,
12716 * or EOF a non-existant assoc with no data
12718 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12722 /* get an asoc/stcb struct */
12723 vrf_id = inp->def_vrf_id;
12725 if (create_lock_applied == 0) {
12726 panic("Error, should hold create lock and I don't?");
12729 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12730 inp->sctp_ep.pre_open_stream_count,
12733 if (stcb == NULL) {
12734 /* Error is setup for us in the call */
12737 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12738 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12740 * Set the connected flag so we can queue
12743 soisconnecting(so);
12746 if (create_lock_applied) {
12747 SCTP_ASOC_CREATE_UNLOCK(inp);
12748 create_lock_applied = 0;
12750 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12753 * Turn on queue only flag to prevent data from
12757 asoc = &stcb->asoc;
12758 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12759 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12761 /* initialize authentication params for the assoc */
12762 sctp_initialize_auth_params(inp, stcb);
12765 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12766 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12767 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12773 /* out with the INIT */
12774 queue_only_for_init = 1;
12776 * we may want to dig in after this call and adjust the MTU
12777 * value. It defaulted to 1500 (constant) but the ro
12778 * structure may now have an update and thus we may need to
12779 * change it BEFORE we append the message.
12783 asoc = &stcb->asoc;
12785 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12786 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12788 net = sctp_findnet(stcb, addr);
12791 if ((net == NULL) ||
12792 ((port != 0) && (port != stcb->rport))) {
12793 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12798 if (stcb->asoc.alternate) {
12799 net = stcb->asoc.alternate;
12801 net = stcb->asoc.primary_destination;
12804 atomic_add_int(&stcb->total_sends, 1);
12805 /* Keep the stcb from being freed under our feet */
12806 atomic_add_int(&asoc->refcnt, 1);
12807 free_cnt_applied = 1;
12809 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12810 if (sndlen > asoc->smallest_mtu) {
12811 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12816 if (SCTP_SO_IS_NBIO(so)
12817 || (flags & MSG_NBIO)
12821 /* would we block? */
12822 if (non_blocking) {
12823 if (hold_tcblock == 0) {
12824 SCTP_TCB_LOCK(stcb);
12827 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12828 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12829 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12830 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12831 if (sndlen > SCTP_SB_LIMIT_SND(so))
12834 error = EWOULDBLOCK;
12837 stcb->asoc.sb_send_resv += sndlen;
12838 SCTP_TCB_UNLOCK(stcb);
12841 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12843 local_soresv = sndlen;
12844 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12845 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12846 error = ECONNRESET;
12849 if (create_lock_applied) {
12850 SCTP_ASOC_CREATE_UNLOCK(inp);
12851 create_lock_applied = 0;
12853 /* Is the stream no. valid? */
12854 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12855 /* Invalid stream number */
12856 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12860 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12861 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12863 * Can't queue any data while stream reset is underway.
12865 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12870 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12873 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12874 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12877 /* we are now done with all control */
12879 sctp_m_freem(control);
12882 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12883 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12884 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12885 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12886 if (srcv->sinfo_flags & SCTP_ABORT) {
12889 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12890 error = ECONNRESET;
12894 /* Ok, we will attempt a msgsnd :> */
12896 p->td_ru.ru_msgsnd++;
12898 /* Are we aborting? */
12899 if (srcv->sinfo_flags & SCTP_ABORT) {
12901 int tot_demand, tot_out = 0, max_out;
12903 SCTP_STAT_INCR(sctps_sends_with_abort);
12904 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12905 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12906 /* It has to be up before we abort */
12907 /* how big is the user initiated abort? */
12908 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12912 if (hold_tcblock) {
12913 SCTP_TCB_UNLOCK(stcb);
12917 struct mbuf *cntm = NULL;
12919 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12921 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12922 tot_out += SCTP_BUF_LEN(cntm);
12926 /* Must fit in a MTU */
12928 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12929 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12931 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12935 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12938 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12942 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12943 max_out -= sizeof(struct sctp_abort_msg);
12944 if (tot_out > max_out) {
12948 struct sctp_paramhdr *ph;
12950 /* now move forward the data pointer */
12951 ph = mtod(mm, struct sctp_paramhdr *);
12952 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12953 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + tot_out));
12955 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12957 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12960 * Here if we can't get his data we
12961 * still abort we just don't get to
12962 * send the users note :-0
12969 SCTP_BUF_NEXT(mm) = top;
12973 if (hold_tcblock == 0) {
12974 SCTP_TCB_LOCK(stcb);
12976 atomic_add_int(&stcb->asoc.refcnt, -1);
12977 free_cnt_applied = 0;
12978 /* release this lock, otherwise we hang on ourselves */
12979 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12980 /* now relock the stcb so everything is sane */
12984 * In this case top is already chained to mm avoid double
12985 * free, since we free it below if top != NULL and driver
12986 * would free it after sending the packet out
12993 /* Calculate the maximum we can send */
12994 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12995 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12996 if (non_blocking) {
12997 /* we already checked for non-blocking above. */
13000 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13005 if (hold_tcblock) {
13006 SCTP_TCB_UNLOCK(stcb);
13009 if (asoc->strmout == NULL) {
13010 /* huh? software error */
13011 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13015 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13016 if ((user_marks_eor == 0) &&
13017 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13018 /* It will NEVER fit */
13019 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13023 if ((uio == NULL) && user_marks_eor) {
13025 * We do not support eeor mode for
13026 * sending with mbuf chains (like sendfile).
13028 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13032 if (user_marks_eor) {
13033 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13036 * For non-eeor the whole message must fit in
13037 * the socket send buffer.
13039 local_add_more = sndlen;
13042 if (non_blocking) {
13043 goto skip_preblock;
13045 if (((max_len <= local_add_more) &&
13046 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13048 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13049 /* No room right now ! */
13050 SOCKBUF_LOCK(&so->so_snd);
13051 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13052 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13053 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13054 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13055 (unsigned int)SCTP_SB_LIMIT_SND(so),
13058 stcb->asoc.stream_queue_cnt,
13059 stcb->asoc.chunks_on_out_queue,
13060 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13061 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13062 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13065 stcb->block_entry = &be;
13066 error = sbwait(&so->so_snd);
13067 stcb->block_entry = NULL;
13068 if (error || so->so_error || be.error) {
13071 error = so->so_error;
13076 SOCKBUF_UNLOCK(&so->so_snd);
13079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13080 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13081 asoc, stcb->asoc.total_output_queue_size);
13083 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13084 SOCKBUF_UNLOCK(&so->so_snd);
13087 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13089 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13090 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13094 SOCKBUF_UNLOCK(&so->so_snd);
13097 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13101 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13102 * case NOTE: uio will be null when top/mbuf is passed
13105 if (srcv->sinfo_flags & SCTP_EOF) {
13106 got_all_of_the_send = 1;
13109 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13115 struct sctp_stream_queue_pending *sp;
13116 struct sctp_stream_out *strm;
13119 SCTP_TCB_SEND_LOCK(stcb);
13120 if ((asoc->stream_locked) &&
13121 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13122 SCTP_TCB_SEND_UNLOCK(stcb);
13123 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13127 SCTP_TCB_SEND_UNLOCK(stcb);
13129 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13130 if (strm->last_msg_incomplete == 0) {
13132 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13133 if ((sp == NULL) || (error)) {
13136 SCTP_TCB_SEND_LOCK(stcb);
13137 if (sp->msg_is_complete) {
13138 strm->last_msg_incomplete = 0;
13139 asoc->stream_locked = 0;
13142 * Just got locked to this guy in case of an
13145 strm->last_msg_incomplete = 1;
13146 if (stcb->asoc.idata_supported == 0) {
13147 asoc->stream_locked = 1;
13148 asoc->stream_locked_on = srcv->sinfo_stream;
13150 sp->sender_all_done = 0;
13152 sctp_snd_sb_alloc(stcb, sp->length);
13153 atomic_add_int(&asoc->stream_queue_cnt, 1);
13154 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13155 SCTP_STAT_INCR(sctps_sends_with_unord);
13157 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13158 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13159 SCTP_TCB_SEND_UNLOCK(stcb);
13161 SCTP_TCB_SEND_LOCK(stcb);
13162 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13163 SCTP_TCB_SEND_UNLOCK(stcb);
13165 /* ???? Huh ??? last msg is gone */
13167 panic("Warning: Last msg marked incomplete, yet nothing left?");
13169 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13170 strm->last_msg_incomplete = 0;
13176 while (uio->uio_resid > 0) {
13177 /* How much room do we have? */
13178 struct mbuf *new_tail, *mm;
13180 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13181 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13185 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13186 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13187 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13190 if (hold_tcblock) {
13191 SCTP_TCB_UNLOCK(stcb);
13194 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13195 if ((mm == NULL) || error) {
13201 /* Update the mbuf and count */
13202 SCTP_TCB_SEND_LOCK(stcb);
13203 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13205 * we need to get out. Peer probably
13209 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13210 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13211 error = ECONNRESET;
13213 SCTP_TCB_SEND_UNLOCK(stcb);
13216 if (sp->tail_mbuf) {
13217 /* tack it to the end */
13218 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13219 sp->tail_mbuf = new_tail;
13221 /* A stolen mbuf */
13223 sp->tail_mbuf = new_tail;
13225 sctp_snd_sb_alloc(stcb, sndout);
13226 atomic_add_int(&sp->length, sndout);
13228 if (srcv->sinfo_flags & SCTP_SACK_IMMEDIATELY) {
13229 sp->sinfo_flags |= SCTP_SACK_IMMEDIATELY;
13231 /* Did we reach EOR? */
13232 if ((uio->uio_resid == 0) &&
13233 ((user_marks_eor == 0) ||
13234 (srcv->sinfo_flags & SCTP_EOF) ||
13235 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13236 sp->msg_is_complete = 1;
13238 sp->msg_is_complete = 0;
13240 SCTP_TCB_SEND_UNLOCK(stcb);
13242 if (uio->uio_resid == 0) {
13247 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13249 * This is ugly but we must assure locking
13252 if (hold_tcblock == 0) {
13253 SCTP_TCB_LOCK(stcb);
13256 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13257 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13258 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13259 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13265 SCTP_TCB_UNLOCK(stcb);
13268 /* wait for space now */
13269 if (non_blocking) {
13270 /* Non-blocking io in place out */
13273 /* What about the INIT, send it maybe */
13274 if (queue_only_for_init) {
13275 if (hold_tcblock == 0) {
13276 SCTP_TCB_LOCK(stcb);
13279 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13280 /* a collision took us forward? */
13283 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13284 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13288 if ((net->flight_size > net->cwnd) &&
13289 (asoc->sctp_cmt_on_off == 0)) {
13290 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13292 } else if (asoc->ifp_had_enobuf) {
13293 SCTP_STAT_INCR(sctps_ifnomemqueued);
13294 if (net->flight_size > (2 * net->mtu)) {
13297 asoc->ifp_had_enobuf = 0;
13299 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13300 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13301 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13302 (stcb->asoc.total_flight > 0) &&
13303 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13304 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13307 * Ok, Nagle is set on and we have data outstanding.
13308 * Don't send anything and let SACKs drive out the
13309 * data unless we have a "full" segment to send.
13311 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13312 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13314 SCTP_STAT_INCR(sctps_naglequeued);
13317 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13318 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13319 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13321 SCTP_STAT_INCR(sctps_naglesent);
13324 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13326 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13327 nagle_applies, un_sent);
13328 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13329 stcb->asoc.total_flight,
13330 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13332 if (queue_only_for_init)
13333 queue_only_for_init = 0;
13334 if ((queue_only == 0) && (nagle_applies == 0)) {
13336 * need to start chunk output
13337 * before blocking.. note that if
13338 * a lock is already applied, then
13339 * the input via the net is happening
13340 * and I don't need to start output :-D
13342 if (hold_tcblock == 0) {
13343 if (SCTP_TCB_TRYLOCK(stcb)) {
13345 sctp_chunk_output(inp,
13347 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13350 sctp_chunk_output(inp,
13352 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13354 if (hold_tcblock == 1) {
13355 SCTP_TCB_UNLOCK(stcb);
13359 SOCKBUF_LOCK(&so->so_snd);
13361 * This is a bit strange, but I think it will
13362 * work. The total_output_queue_size is locked and
13363 * protected by the TCB_LOCK, which we just released.
13364 * There is a race that can occur between releasing it
13365 * above, and me getting the socket lock, where sacks
13366 * come in but we have not put the SB_WAIT on the
13367 * so_snd buffer to get the wakeup. After the LOCK
13368 * is applied the sack_processing will also need to
13369 * LOCK the so->so_snd to do the actual sowwakeup(). So
13370 * once we have the socket buffer lock if we recheck the
13371 * size we KNOW we will get to sleep safely with the
13372 * wakeup flag in place.
13374 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13375 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13376 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13377 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13378 asoc, (size_t)uio->uio_resid);
13381 stcb->block_entry = &be;
13382 error = sbwait(&so->so_snd);
13383 stcb->block_entry = NULL;
13385 if (error || so->so_error || be.error) {
13388 error = so->so_error;
13393 SOCKBUF_UNLOCK(&so->so_snd);
13396 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13397 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13398 asoc, stcb->asoc.total_output_queue_size);
13401 SOCKBUF_UNLOCK(&so->so_snd);
13402 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13406 SCTP_TCB_SEND_LOCK(stcb);
13408 if (sp->msg_is_complete == 0) {
13409 strm->last_msg_incomplete = 1;
13410 if (stcb->asoc.idata_supported == 0) {
13411 asoc->stream_locked = 1;
13412 asoc->stream_locked_on = srcv->sinfo_stream;
13415 sp->sender_all_done = 1;
13416 strm->last_msg_incomplete = 0;
13417 asoc->stream_locked = 0;
13420 SCTP_PRINTF("Huh no sp TSNH?\n");
13421 strm->last_msg_incomplete = 0;
13422 asoc->stream_locked = 0;
13424 SCTP_TCB_SEND_UNLOCK(stcb);
13425 if (uio->uio_resid == 0) {
13426 got_all_of_the_send = 1;
13429 /* We send in a 0, since we do NOT have any locks */
13430 error = sctp_msg_append(stcb, net, top, srcv, 0);
13432 if (srcv->sinfo_flags & SCTP_EOF) {
13434 * This should only happen for Panda for the mbuf
13435 * send case, which does NOT yet support EEOR mode.
13436 * Thus, we can just set this flag to do the proper
13439 got_all_of_the_send = 1;
13447 if ((srcv->sinfo_flags & SCTP_EOF) &&
13448 (got_all_of_the_send == 1)) {
13449 SCTP_STAT_INCR(sctps_sends_with_eof);
13451 if (hold_tcblock == 0) {
13452 SCTP_TCB_LOCK(stcb);
13455 if (TAILQ_EMPTY(&asoc->send_queue) &&
13456 TAILQ_EMPTY(&asoc->sent_queue) &&
13457 sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED) == 0) {
13458 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13461 /* there is nothing queued to send, so I'm done... */
13462 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13463 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13464 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13465 struct sctp_nets *netp;
13467 /* only send SHUTDOWN the first time through */
13468 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13469 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13471 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13472 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13473 sctp_stop_timers_for_shutdown(stcb);
13474 if (stcb->asoc.alternate) {
13475 netp = stcb->asoc.alternate;
13477 netp = stcb->asoc.primary_destination;
13479 sctp_send_shutdown(stcb, netp);
13480 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13482 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13483 asoc->primary_destination);
13487 * we still got (or just got) data to send, so set
13491 * XXX sockets draft says that SCTP_EOF should be
13492 * sent with no data. currently, we will allow user
13493 * data to be sent first and move to
13496 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13497 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13498 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13499 if (hold_tcblock == 0) {
13500 SCTP_TCB_LOCK(stcb);
13503 if ((*asoc->ss_functions.sctp_ss_is_user_msgs_incomplete) (stcb, asoc)) {
13504 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13506 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13507 if (TAILQ_EMPTY(&asoc->send_queue) &&
13508 TAILQ_EMPTY(&asoc->sent_queue) &&
13509 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13510 struct mbuf *op_err;
13511 char msg[SCTP_DIAG_INFO_LEN];
13514 if (free_cnt_applied) {
13515 atomic_add_int(&stcb->asoc.refcnt, -1);
13516 free_cnt_applied = 0;
13518 snprintf(msg, sizeof(msg),
13519 "%s:%d at %s", __FILE__, __LINE__, __func__);
13520 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13522 sctp_abort_an_association(stcb->sctp_ep, stcb,
13523 op_err, SCTP_SO_LOCKED);
13525 * now relock the stcb so everything
13532 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13533 asoc->primary_destination);
13534 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13539 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13540 some_on_control = 1;
13542 if (queue_only_for_init) {
13543 if (hold_tcblock == 0) {
13544 SCTP_TCB_LOCK(stcb);
13547 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13548 /* a collision took us forward? */
13551 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13552 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13556 if ((net->flight_size > net->cwnd) &&
13557 (stcb->asoc.sctp_cmt_on_off == 0)) {
13558 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13560 } else if (asoc->ifp_had_enobuf) {
13561 SCTP_STAT_INCR(sctps_ifnomemqueued);
13562 if (net->flight_size > (2 * net->mtu)) {
13565 asoc->ifp_had_enobuf = 0;
13567 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13568 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13569 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13570 (stcb->asoc.total_flight > 0) &&
13571 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13572 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13574 * Ok, Nagle is set on and we have data outstanding.
13575 * Don't send anything and let SACKs drive out the
13576 * data unless wen have a "full" segment to send.
13578 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13579 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13581 SCTP_STAT_INCR(sctps_naglequeued);
13584 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13585 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13586 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13588 SCTP_STAT_INCR(sctps_naglesent);
13591 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13592 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13593 nagle_applies, un_sent);
13594 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13595 stcb->asoc.total_flight,
13596 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13598 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13599 /* we can attempt to send too. */
13600 if (hold_tcblock == 0) {
13602 * If there is activity recv'ing sacks no need to
13605 if (SCTP_TCB_TRYLOCK(stcb)) {
13606 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13610 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13612 } else if ((queue_only == 0) &&
13613 (stcb->asoc.peers_rwnd == 0) &&
13614 (stcb->asoc.total_flight == 0)) {
13615 /* We get to have a probe outstanding */
13616 if (hold_tcblock == 0) {
13618 SCTP_TCB_LOCK(stcb);
13620 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13621 } else if (some_on_control) {
13622 int num_out, reason, frag_point;
13624 /* Here we do control only */
13625 if (hold_tcblock == 0) {
13627 SCTP_TCB_LOCK(stcb);
13629 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13630 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13631 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13633 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13634 queue_only, stcb->asoc.peers_rwnd, un_sent,
13635 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13636 stcb->asoc.total_output_queue_size, error);
13641 if (local_soresv && stcb) {
13642 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13644 if (create_lock_applied) {
13645 SCTP_ASOC_CREATE_UNLOCK(inp);
13647 if ((stcb) && hold_tcblock) {
13648 SCTP_TCB_UNLOCK(stcb);
13650 if (stcb && free_cnt_applied) {
13651 atomic_add_int(&stcb->asoc.refcnt, -1);
13655 if (mtx_owned(&stcb->tcb_mtx)) {
13656 panic("Leaving with tcb mtx owned?");
13658 if (mtx_owned(&stcb->tcb_send_mtx)) {
13659 panic("Leaving with tcb send mtx owned?");
13667 sctp_m_freem(control);
13674 * generate an AUTHentication chunk, if required
13677 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13678 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13679 struct sctp_tcb *stcb, uint8_t chunk)
13681 struct mbuf *m_auth;
13682 struct sctp_auth_chunk *auth;
13686 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13690 if (stcb->asoc.auth_supported == 0) {
13693 /* does the requested chunk require auth? */
13694 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13697 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13698 if (m_auth == NULL) {
13702 /* reserve some space if this will be the first mbuf */
13704 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13705 /* fill in the AUTH chunk details */
13706 auth = mtod(m_auth, struct sctp_auth_chunk *);
13707 bzero(auth, sizeof(*auth));
13708 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13709 auth->ch.chunk_flags = 0;
13710 chunk_len = sizeof(*auth) +
13711 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13712 auth->ch.chunk_length = htons(chunk_len);
13713 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13714 /* key id and hmac digest will be computed and filled in upon send */
13716 /* save the offset where the auth was inserted into the chain */
13718 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13719 *offset += SCTP_BUF_LEN(cn);
13722 /* update length and return pointer to the auth chunk */
13723 SCTP_BUF_LEN(m_auth) = chunk_len;
13724 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13725 if (auth_ret != NULL)
13733 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13735 struct nd_prefix *pfx = NULL;
13736 struct nd_pfxrouter *pfxrtr = NULL;
13737 struct sockaddr_in6 gw6;
13739 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13742 /* get prefix entry of address */
13743 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13744 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13746 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13747 &src6->sin6_addr, &pfx->ndpr_mask))
13750 /* no prefix entry in the prefix list */
13752 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13753 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13756 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13757 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13759 /* search installed gateway from prefix entry */
13760 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13761 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13762 gw6.sin6_family = AF_INET6;
13763 gw6.sin6_len = sizeof(struct sockaddr_in6);
13764 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13765 sizeof(struct in6_addr));
13766 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13767 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13768 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13769 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13770 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13771 ro->ro_rt->rt_gateway)) {
13772 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13776 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13783 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13786 struct sockaddr_in *sin, *mask;
13787 struct ifaddr *ifa;
13788 struct in_addr srcnetaddr, gwnetaddr;
13790 if (ro == NULL || ro->ro_rt == NULL ||
13791 sifa->address.sa.sa_family != AF_INET) {
13794 ifa = (struct ifaddr *)sifa->ifa;
13795 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13796 sin = &sifa->address.sin;
13797 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13798 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13799 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13800 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13802 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13803 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13804 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13805 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13806 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13807 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {