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_sequence_send = 0;
3647 #if defined(SCTP_DETAILED_STR_STATS)
3648 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3649 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3650 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3653 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3654 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3656 stcb->asoc.strmout[i].stream_no = i;
3657 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3658 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
3659 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3664 case SCTP_DSTADDRV4:
3665 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3669 memset(&sin, 0, sizeof(struct sockaddr_in));
3670 sin.sin_family = AF_INET;
3671 sin.sin_len = sizeof(struct sockaddr_in);
3672 sin.sin_port = stcb->rport;
3673 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3674 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3675 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3676 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3680 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3681 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3688 case SCTP_DSTADDRV6:
3689 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3693 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3694 sin6.sin6_family = AF_INET6;
3695 sin6.sin6_len = sizeof(struct sockaddr_in6);
3696 sin6.sin6_port = stcb->rport;
3697 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3698 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3699 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3704 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3705 in6_sin6_2_sin(&sin, &sin6);
3706 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3707 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3708 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3712 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, stcb->asoc.port,
3713 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3719 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, stcb->asoc.port,
3720 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3730 at += CMSG_ALIGN(cmh.cmsg_len);
3735 static struct sctp_tcb *
3736 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3738 struct mbuf *control,
3739 struct sctp_nets **net_p,
3744 struct sctp_tcb *stcb;
3745 struct sockaddr *addr;
3748 struct sockaddr_in sin;
3752 struct sockaddr_in6 sin6;
3756 tlen = SCTP_BUF_LEN(control);
3759 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3760 /* There is not enough room for one more. */
3764 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3765 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3766 /* We dont't have a complete CMSG header. */
3770 if (((int)cmh.cmsg_len + at) > tlen) {
3771 /* We don't have the complete CMSG. */
3775 if (cmh.cmsg_level == IPPROTO_SCTP) {
3776 switch (cmh.cmsg_type) {
3778 case SCTP_DSTADDRV4:
3779 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3783 memset(&sin, 0, sizeof(struct sockaddr_in));
3784 sin.sin_family = AF_INET;
3785 sin.sin_len = sizeof(struct sockaddr_in);
3786 sin.sin_port = port;
3787 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3788 addr = (struct sockaddr *)&sin;
3792 case SCTP_DSTADDRV6:
3793 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3797 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3798 sin6.sin6_family = AF_INET6;
3799 sin6.sin6_len = sizeof(struct sockaddr_in6);
3800 sin6.sin6_port = port;
3801 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3803 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3804 in6_sin6_2_sin(&sin, &sin6);
3805 addr = (struct sockaddr *)&sin;
3808 addr = (struct sockaddr *)&sin6;
3816 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3822 at += CMSG_ALIGN(cmh.cmsg_len);
3827 static struct mbuf *
3828 sctp_add_cookie(struct mbuf *init, int init_offset,
3829 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3831 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3832 struct sctp_state_cookie *stc;
3833 struct sctp_paramhdr *ph;
3838 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3839 sizeof(struct sctp_paramhdr)), 0,
3840 M_NOWAIT, 1, MT_DATA);
3844 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3845 if (copy_init == NULL) {
3849 #ifdef SCTP_MBUF_LOGGING
3850 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3851 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3854 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3856 if (copy_initack == NULL) {
3858 sctp_m_freem(copy_init);
3861 #ifdef SCTP_MBUF_LOGGING
3862 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3863 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3866 /* easy side we just drop it on the end */
3867 ph = mtod(mret, struct sctp_paramhdr *);
3868 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3869 sizeof(struct sctp_paramhdr);
3870 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3871 sizeof(struct sctp_paramhdr));
3872 ph->param_type = htons(SCTP_STATE_COOKIE);
3873 ph->param_length = 0; /* fill in at the end */
3874 /* Fill in the stc cookie data */
3875 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3877 /* tack the INIT and then the INIT-ACK onto the chain */
3879 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3880 cookie_sz += SCTP_BUF_LEN(m_at);
3881 if (SCTP_BUF_NEXT(m_at) == NULL) {
3882 SCTP_BUF_NEXT(m_at) = copy_init;
3886 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3887 cookie_sz += SCTP_BUF_LEN(m_at);
3888 if (SCTP_BUF_NEXT(m_at) == NULL) {
3889 SCTP_BUF_NEXT(m_at) = copy_initack;
3893 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3894 cookie_sz += SCTP_BUF_LEN(m_at);
3895 if (SCTP_BUF_NEXT(m_at) == NULL) {
3899 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3901 /* no space, so free the entire chain */
3905 SCTP_BUF_LEN(sig) = 0;
3906 SCTP_BUF_NEXT(m_at) = sig;
3908 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3909 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3911 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3912 cookie_sz += SCTP_SIGNATURE_SIZE;
3913 ph->param_length = htons(cookie_sz);
3919 sctp_get_ect(struct sctp_tcb *stcb)
3921 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3922 return (SCTP_ECT0_BIT);
3928 #if defined(INET) || defined(INET6)
3930 sctp_handle_no_route(struct sctp_tcb *stcb,
3931 struct sctp_nets *net,
3934 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3938 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3939 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3940 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3941 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3942 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3946 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3947 net->dest_state &= ~SCTP_ADDR_PF;
3951 if (net == stcb->asoc.primary_destination) {
3952 /* need a new primary */
3953 struct sctp_nets *alt;
3955 alt = sctp_find_alternate_net(stcb, net, 0);
3957 if (stcb->asoc.alternate) {
3958 sctp_free_remote_addr(stcb->asoc.alternate);
3960 stcb->asoc.alternate = alt;
3961 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3962 if (net->ro._s_addr) {
3963 sctp_free_ifa(net->ro._s_addr);
3964 net->ro._s_addr = NULL;
3966 net->src_addr_selected = 0;
3976 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3977 struct sctp_tcb *stcb, /* may be NULL */
3978 struct sctp_nets *net,
3979 struct sockaddr *to,
3981 uint32_t auth_offset,
3982 struct sctp_auth_chunk *auth,
3983 uint16_t auth_keyid,
3984 int nofragment_flag,
3991 union sctp_sockstore *over_addr,
3992 uint8_t mflowtype, uint32_t mflowid,
3993 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3994 int so_locked SCTP_UNUSED
3999 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4002 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4003 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4004 * - fill in the HMAC digest of any AUTH chunk in the packet.
4005 * - calculate and fill in the SCTP checksum.
4006 * - prepend an IP address header.
4007 * - if boundall use INADDR_ANY.
4008 * - if boundspecific do source address selection.
4009 * - set fragmentation option for ipV4.
4010 * - On return from IP output, check/adjust mtu size of output
4011 * interface and smallest_mtu size as well.
4013 /* Will need ifdefs around this */
4015 struct sctphdr *sctphdr;
4019 #if defined(INET) || defined(INET6)
4023 #if defined(INET) || defined(INET6)
4025 sctp_route_t *ro = NULL;
4026 struct udphdr *udp = NULL;
4031 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4032 struct socket *so = NULL;
4036 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4037 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4041 #if defined(INET) || defined(INET6)
4043 vrf_id = stcb->asoc.vrf_id;
4045 vrf_id = inp->def_vrf_id;
4048 /* fill in the HMAC digest for any AUTH chunk in the packet */
4049 if ((auth != NULL) && (stcb != NULL)) {
4050 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4053 tos_value = net->dscp;
4055 tos_value = stcb->asoc.default_dscp;
4057 tos_value = inp->sctp_ep.default_dscp;
4060 switch (to->sa_family) {
4064 struct ip *ip = NULL;
4065 sctp_route_t iproute;
4068 len = SCTP_MIN_V4_OVERHEAD;
4070 len += sizeof(struct udphdr);
4072 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4075 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4078 SCTP_ALIGN_TO_END(newm, len);
4079 SCTP_BUF_LEN(newm) = len;
4080 SCTP_BUF_NEXT(newm) = m;
4083 m->m_pkthdr.flowid = net->flowid;
4084 M_HASHTYPE_SET(m, net->flowtype);
4086 m->m_pkthdr.flowid = mflowid;
4087 M_HASHTYPE_SET(m, mflowtype);
4089 packet_length = sctp_calculate_len(m);
4090 ip = mtod(m, struct ip *);
4091 ip->ip_v = IPVERSION;
4092 ip->ip_hl = (sizeof(struct ip) >> 2);
4093 if (tos_value == 0) {
4095 * This means especially, that it is not set
4096 * at the SCTP layer. So use the value from
4099 tos_value = inp->ip_inp.inp.inp_ip_tos;
4103 tos_value |= sctp_get_ect(stcb);
4105 if ((nofragment_flag) && (port == 0)) {
4106 ip->ip_off = htons(IP_DF);
4108 ip->ip_off = htons(0);
4110 /* FreeBSD has a function for ip_id's */
4113 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4114 ip->ip_len = htons(packet_length);
4115 ip->ip_tos = tos_value;
4117 ip->ip_p = IPPROTO_UDP;
4119 ip->ip_p = IPPROTO_SCTP;
4124 memset(&iproute, 0, sizeof(iproute));
4125 memcpy(&ro->ro_dst, to, to->sa_len);
4127 ro = (sctp_route_t *) & net->ro;
4129 /* Now the address selection part */
4130 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4132 /* call the routine to select the src address */
4133 if (net && out_of_asoc_ok == 0) {
4134 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4135 sctp_free_ifa(net->ro._s_addr);
4136 net->ro._s_addr = NULL;
4137 net->src_addr_selected = 0;
4143 if (net->src_addr_selected == 0) {
4144 /* Cache the source address */
4145 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4148 net->src_addr_selected = 1;
4150 if (net->ro._s_addr == NULL) {
4151 /* No route to host */
4152 net->src_addr_selected = 0;
4153 sctp_handle_no_route(stcb, net, so_locked);
4154 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4156 return (EHOSTUNREACH);
4158 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4160 if (over_addr == NULL) {
4161 struct sctp_ifa *_lsrc;
4163 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4167 if (_lsrc == NULL) {
4168 sctp_handle_no_route(stcb, net, so_locked);
4169 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4171 return (EHOSTUNREACH);
4173 ip->ip_src = _lsrc->address.sin.sin_addr;
4174 sctp_free_ifa(_lsrc);
4176 ip->ip_src = over_addr->sin.sin_addr;
4177 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4181 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4182 sctp_handle_no_route(stcb, net, so_locked);
4183 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4185 return (EHOSTUNREACH);
4187 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4188 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4189 udp->uh_dport = port;
4190 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip)));
4192 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4196 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4198 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4201 sctphdr->src_port = src_port;
4202 sctphdr->dest_port = dest_port;
4203 sctphdr->v_tag = v_tag;
4204 sctphdr->checksum = 0;
4207 * If source address selection fails and we find no
4208 * route then the ip_output should fail as well with
4209 * a NO_ROUTE_TO_HOST type error. We probably should
4210 * catch that somewhere and abort the association
4211 * right away (assuming this is an INIT being sent).
4213 if (ro->ro_rt == NULL) {
4215 * src addr selection failed to find a route
4216 * (or valid source addr), so we can't get
4217 * there from here (yet)!
4219 sctp_handle_no_route(stcb, net, so_locked);
4220 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4222 return (EHOSTUNREACH);
4224 if (ro != &iproute) {
4225 memcpy(&iproute, ro, sizeof(*ro));
4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4228 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4229 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4230 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4231 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4234 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4235 /* failed to prepend data, give up */
4236 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4240 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4242 #if defined(SCTP_WITH_NO_CSUM)
4243 SCTP_STAT_INCR(sctps_sendnocrc);
4245 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4246 SCTP_STAT_INCR(sctps_sendswcrc);
4249 SCTP_ENABLE_UDP_CSUM(o_pak);
4252 #if defined(SCTP_WITH_NO_CSUM)
4253 SCTP_STAT_INCR(sctps_sendnocrc);
4255 m->m_pkthdr.csum_flags = CSUM_SCTP;
4256 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4257 SCTP_STAT_INCR(sctps_sendhwcrc);
4260 #ifdef SCTP_PACKET_LOGGING
4261 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4262 sctp_packet_log(o_pak);
4264 /* send it out. table id is taken from stcb */
4265 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4266 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4267 so = SCTP_INP_SO(inp);
4268 SCTP_SOCKET_UNLOCK(so, 0);
4271 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4272 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4273 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4274 atomic_add_int(&stcb->asoc.refcnt, 1);
4275 SCTP_TCB_UNLOCK(stcb);
4276 SCTP_SOCKET_LOCK(so, 0);
4277 SCTP_TCB_LOCK(stcb);
4278 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4281 SCTP_STAT_INCR(sctps_sendpackets);
4282 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4284 SCTP_STAT_INCR(sctps_senderrors);
4286 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4288 /* free tempy routes */
4292 * PMTU check versus smallest asoc MTU goes
4295 if ((ro->ro_rt != NULL) &&
4296 (net->ro._s_addr)) {
4299 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4301 mtu -= sizeof(struct udphdr);
4303 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4304 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4307 } else if (ro->ro_rt == NULL) {
4308 /* route was freed */
4309 if (net->ro._s_addr &&
4310 net->src_addr_selected) {
4311 sctp_free_ifa(net->ro._s_addr);
4312 net->ro._s_addr = NULL;
4314 net->src_addr_selected = 0;
4323 uint32_t flowlabel, flowinfo;
4324 struct ip6_hdr *ip6h;
4325 struct route_in6 ip6route;
4327 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4329 struct sockaddr_in6 lsa6_storage;
4331 u_short prev_port = 0;
4335 flowlabel = net->flowlabel;
4337 flowlabel = stcb->asoc.default_flowlabel;
4339 flowlabel = inp->sctp_ep.default_flowlabel;
4341 if (flowlabel == 0) {
4343 * This means especially, that it is not set
4344 * at the SCTP layer. So use the value from
4347 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4349 flowlabel &= 0x000fffff;
4350 len = SCTP_MIN_OVERHEAD;
4352 len += sizeof(struct udphdr);
4354 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4357 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4360 SCTP_ALIGN_TO_END(newm, len);
4361 SCTP_BUF_LEN(newm) = len;
4362 SCTP_BUF_NEXT(newm) = m;
4365 m->m_pkthdr.flowid = net->flowid;
4366 M_HASHTYPE_SET(m, net->flowtype);
4368 m->m_pkthdr.flowid = mflowid;
4369 M_HASHTYPE_SET(m, mflowtype);
4371 packet_length = sctp_calculate_len(m);
4373 ip6h = mtod(m, struct ip6_hdr *);
4374 /* protect *sin6 from overwrite */
4375 sin6 = (struct sockaddr_in6 *)to;
4379 /* KAME hack: embed scopeid */
4380 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4381 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4385 memset(&ip6route, 0, sizeof(ip6route));
4386 ro = (sctp_route_t *) & ip6route;
4387 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4389 ro = (sctp_route_t *) & net->ro;
4392 * We assume here that inp_flow is in host byte
4393 * order within the TCB!
4395 if (tos_value == 0) {
4397 * This means especially, that it is not set
4398 * at the SCTP layer. So use the value from
4401 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4405 tos_value |= sctp_get_ect(stcb);
4409 flowinfo |= tos_value;
4411 flowinfo |= flowlabel;
4412 ip6h->ip6_flow = htonl(flowinfo);
4414 ip6h->ip6_nxt = IPPROTO_UDP;
4416 ip6h->ip6_nxt = IPPROTO_SCTP;
4418 ip6h->ip6_plen = (uint16_t) (packet_length - sizeof(struct ip6_hdr));
4419 ip6h->ip6_dst = sin6->sin6_addr;
4422 * Add SRC address selection here: we can only reuse
4423 * to a limited degree the kame src-addr-sel, since
4424 * we can try their selection but it may not be
4427 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4428 lsa6_tmp.sin6_family = AF_INET6;
4429 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4431 if (net && out_of_asoc_ok == 0) {
4432 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4433 sctp_free_ifa(net->ro._s_addr);
4434 net->ro._s_addr = NULL;
4435 net->src_addr_selected = 0;
4441 if (net->src_addr_selected == 0) {
4442 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4443 /* KAME hack: embed scopeid */
4444 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4445 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4448 /* Cache the source address */
4449 net->ro._s_addr = sctp_source_address_selection(inp,
4455 (void)sa6_recoverscope(sin6);
4456 net->src_addr_selected = 1;
4458 if (net->ro._s_addr == NULL) {
4459 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4460 net->src_addr_selected = 0;
4461 sctp_handle_no_route(stcb, net, so_locked);
4462 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4464 return (EHOSTUNREACH);
4466 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4468 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4469 /* KAME hack: embed scopeid */
4470 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4471 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4474 if (over_addr == NULL) {
4475 struct sctp_ifa *_lsrc;
4477 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4481 if (_lsrc == NULL) {
4482 sctp_handle_no_route(stcb, net, so_locked);
4483 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4485 return (EHOSTUNREACH);
4487 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4488 sctp_free_ifa(_lsrc);
4490 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4491 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4493 (void)sa6_recoverscope(sin6);
4495 lsa6->sin6_port = inp->sctp_lport;
4497 if (ro->ro_rt == NULL) {
4499 * src addr selection failed to find a route
4500 * (or valid source addr), so we can't get
4503 sctp_handle_no_route(stcb, net, so_locked);
4504 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4506 return (EHOSTUNREACH);
4509 * XXX: sa6 may not have a valid sin6_scope_id in
4510 * the non-SCOPEDROUTING case.
4512 bzero(&lsa6_storage, sizeof(lsa6_storage));
4513 lsa6_storage.sin6_family = AF_INET6;
4514 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4515 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4516 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4517 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4522 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4523 lsa6_storage.sin6_port = inp->sctp_lport;
4524 lsa6 = &lsa6_storage;
4525 ip6h->ip6_src = lsa6->sin6_addr;
4528 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4529 sctp_handle_no_route(stcb, net, so_locked);
4530 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4532 return (EHOSTUNREACH);
4534 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4535 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4536 udp->uh_dport = port;
4537 udp->uh_ulen = htons((uint16_t) (packet_length - sizeof(struct ip6_hdr)));
4539 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4541 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4544 sctphdr->src_port = src_port;
4545 sctphdr->dest_port = dest_port;
4546 sctphdr->v_tag = v_tag;
4547 sctphdr->checksum = 0;
4550 * We set the hop limit now since there is a good
4551 * chance that our ro pointer is now filled
4553 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4554 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4557 /* Copy to be sure something bad is not happening */
4558 sin6->sin6_addr = ip6h->ip6_dst;
4559 lsa6->sin6_addr = ip6h->ip6_src;
4562 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4563 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4564 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4565 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4566 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4568 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4570 * preserve the port and scope for link
4573 prev_scope = sin6->sin6_scope_id;
4574 prev_port = sin6->sin6_port;
4576 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4577 /* failed to prepend data, give up */
4579 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4582 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4584 #if defined(SCTP_WITH_NO_CSUM)
4585 SCTP_STAT_INCR(sctps_sendnocrc);
4587 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4588 SCTP_STAT_INCR(sctps_sendswcrc);
4590 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4591 udp->uh_sum = 0xffff;
4594 #if defined(SCTP_WITH_NO_CSUM)
4595 SCTP_STAT_INCR(sctps_sendnocrc);
4597 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4598 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4599 SCTP_STAT_INCR(sctps_sendhwcrc);
4602 /* send it out. table id is taken from stcb */
4603 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4604 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4605 so = SCTP_INP_SO(inp);
4606 SCTP_SOCKET_UNLOCK(so, 0);
4609 #ifdef SCTP_PACKET_LOGGING
4610 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4611 sctp_packet_log(o_pak);
4613 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4614 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4615 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4616 atomic_add_int(&stcb->asoc.refcnt, 1);
4617 SCTP_TCB_UNLOCK(stcb);
4618 SCTP_SOCKET_LOCK(so, 0);
4619 SCTP_TCB_LOCK(stcb);
4620 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4624 /* for link local this must be done */
4625 sin6->sin6_scope_id = prev_scope;
4626 sin6->sin6_port = prev_port;
4628 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4629 SCTP_STAT_INCR(sctps_sendpackets);
4630 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4632 SCTP_STAT_INCR(sctps_senderrors);
4635 /* Now if we had a temp route free it */
4639 * PMTU check versus smallest asoc MTU goes
4642 if (ro->ro_rt == NULL) {
4643 /* Route was freed */
4644 if (net->ro._s_addr &&
4645 net->src_addr_selected) {
4646 sctp_free_ifa(net->ro._s_addr);
4647 net->ro._s_addr = NULL;
4649 net->src_addr_selected = 0;
4651 if ((ro->ro_rt != NULL) &&
4652 (net->ro._s_addr)) {
4655 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4657 (stcb->asoc.smallest_mtu > mtu)) {
4658 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4661 net->mtu -= sizeof(struct udphdr);
4665 if (ND_IFINFO(ifp)->linkmtu &&
4666 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4667 sctp_mtu_size_reset(inp,
4669 ND_IFINFO(ifp)->linkmtu);
4677 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4678 ((struct sockaddr *)to)->sa_family);
4680 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4687 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4688 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4693 struct mbuf *m, *m_last;
4694 struct sctp_nets *net;
4695 struct sctp_init_chunk *init;
4696 struct sctp_supported_addr_param *sup_addr;
4697 struct sctp_adaptation_layer_indication *ali;
4698 struct sctp_supported_chunk_types_param *pr_supported;
4699 struct sctp_paramhdr *ph;
4700 int cnt_inits_to = 0;
4702 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4704 /* INIT's always go to the primary (and usually ONLY address) */
4705 net = stcb->asoc.primary_destination;
4707 net = TAILQ_FIRST(&stcb->asoc.nets);
4712 /* we confirm any address we send an INIT to */
4713 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4714 (void)sctp_set_primary_addr(stcb, NULL, net);
4716 /* we confirm any address we send an INIT to */
4717 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4719 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4721 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4723 * special hook, if we are sending to link local it will not
4724 * show up in our private address count.
4726 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4730 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4731 /* This case should not happen */
4732 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4735 /* start the INIT timer */
4736 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4738 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4740 /* No memory, INIT timer will re-attempt. */
4741 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4744 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4746 /* Now lets put the chunk header in place */
4747 init = mtod(m, struct sctp_init_chunk *);
4748 /* now the chunk header */
4749 init->ch.chunk_type = SCTP_INITIATION;
4750 init->ch.chunk_flags = 0;
4751 /* fill in later from mbuf we build */
4752 init->ch.chunk_length = 0;
4753 /* place in my tag */
4754 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4755 /* set up some of the credits. */
4756 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4757 SCTP_MINIMAL_RWND));
4758 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4759 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4760 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4762 /* Adaptation layer indication parameter */
4763 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4764 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4765 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4766 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4767 ali->ph.param_length = htons(parameter_len);
4768 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4769 chunk_len += parameter_len;
4772 if (stcb->asoc.ecn_supported == 1) {
4773 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4774 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4775 ph->param_type = htons(SCTP_ECN_CAPABLE);
4776 ph->param_length = htons(parameter_len);
4777 chunk_len += parameter_len;
4779 /* PR-SCTP supported parameter */
4780 if (stcb->asoc.prsctp_supported == 1) {
4781 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4782 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4783 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4784 ph->param_length = htons(parameter_len);
4785 chunk_len += parameter_len;
4787 /* Add NAT friendly parameter. */
4788 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4789 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4790 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4791 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4792 ph->param_length = htons(parameter_len);
4793 chunk_len += parameter_len;
4795 /* And now tell the peer which extensions we support */
4797 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4798 if (stcb->asoc.prsctp_supported == 1) {
4799 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4800 if (stcb->asoc.idata_supported) {
4801 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
4804 if (stcb->asoc.auth_supported == 1) {
4805 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4807 if (stcb->asoc.asconf_supported == 1) {
4808 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4809 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4811 if (stcb->asoc.reconfig_supported == 1) {
4812 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4814 if (stcb->asoc.idata_supported) {
4815 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
4817 if (stcb->asoc.nrsack_supported == 1) {
4818 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4820 if (stcb->asoc.pktdrop_supported == 1) {
4821 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4824 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4825 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4826 pr_supported->ph.param_length = htons(parameter_len);
4827 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4828 chunk_len += parameter_len;
4830 /* add authentication parameters */
4831 if (stcb->asoc.auth_supported) {
4832 /* attach RANDOM parameter, if available */
4833 if (stcb->asoc.authinfo.random != NULL) {
4834 struct sctp_auth_random *randp;
4836 if (padding_len > 0) {
4837 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4838 chunk_len += padding_len;
4841 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4842 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4843 /* random key already contains the header */
4844 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4845 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4846 chunk_len += parameter_len;
4848 /* add HMAC_ALGO parameter */
4849 if (stcb->asoc.local_hmacs != NULL) {
4850 struct sctp_auth_hmac_algo *hmacs;
4852 if (padding_len > 0) {
4853 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4854 chunk_len += padding_len;
4857 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4858 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4859 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4860 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4861 hmacs->ph.param_length = htons(parameter_len);
4862 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4863 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4864 chunk_len += parameter_len;
4866 /* add CHUNKS parameter */
4867 if (stcb->asoc.local_auth_chunks != NULL) {
4868 struct sctp_auth_chunk_list *chunks;
4870 if (padding_len > 0) {
4871 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4872 chunk_len += padding_len;
4875 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4876 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4877 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4878 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4879 chunks->ph.param_length = htons(parameter_len);
4880 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4881 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4882 chunk_len += parameter_len;
4885 /* now any cookie time extensions */
4886 if (stcb->asoc.cookie_preserve_req) {
4887 struct sctp_cookie_perserve_param *cookie_preserve;
4889 if (padding_len > 0) {
4890 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4891 chunk_len += padding_len;
4894 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4895 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4896 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4897 cookie_preserve->ph.param_length = htons(parameter_len);
4898 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4899 stcb->asoc.cookie_preserve_req = 0;
4900 chunk_len += parameter_len;
4902 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4905 if (padding_len > 0) {
4906 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4907 chunk_len += padding_len;
4910 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4911 if (stcb->asoc.scope.ipv4_addr_legal) {
4912 parameter_len += (uint16_t) sizeof(uint16_t);
4914 if (stcb->asoc.scope.ipv6_addr_legal) {
4915 parameter_len += (uint16_t) sizeof(uint16_t);
4917 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4918 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4919 sup_addr->ph.param_length = htons(parameter_len);
4921 if (stcb->asoc.scope.ipv4_addr_legal) {
4922 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4924 if (stcb->asoc.scope.ipv6_addr_legal) {
4925 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4927 padding_len = 4 - 2 * i;
4928 chunk_len += parameter_len;
4930 SCTP_BUF_LEN(m) = chunk_len;
4931 /* now the addresses */
4933 * To optimize this we could put the scoping stuff into a structure
4934 * and remove the individual uint8's from the assoc structure. Then
4935 * we could just sifa in the address within the stcb. But for now
4936 * this is a quick hack to get the address stuff teased apart.
4938 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4940 &padding_len, &chunk_len);
4942 init->ch.chunk_length = htons(chunk_len);
4943 if (padding_len > 0) {
4944 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4949 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4950 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4951 (struct sockaddr *)&net->ro._l_addr,
4952 m, 0, NULL, 0, 0, 0, 0,
4953 inp->sctp_lport, stcb->rport, htonl(0),
4957 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4958 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4959 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4963 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4964 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4967 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4968 * being equal to the beginning of the params i.e. (iphlen +
4969 * sizeof(struct sctp_init_msg) parse through the parameters to the
4970 * end of the mbuf verifying that all parameters are known.
4972 * For unknown parameters build and return a mbuf with
4973 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4974 * processing this chunk stop, and set *abort_processing to 1.
4976 * By having param_offset be pre-set to where parameters begin it is
4977 * hoped that this routine may be reused in the future by new
4980 struct sctp_paramhdr *phdr, params;
4982 struct mbuf *mat, *op_err;
4983 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4984 int at, limit, pad_needed;
4985 uint16_t ptype, plen, padded_size;
4988 *abort_processing = 0;
4991 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4995 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4996 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4997 ptype = ntohs(phdr->param_type);
4998 plen = ntohs(phdr->param_length);
4999 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5000 /* wacked parameter */
5001 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5004 limit -= SCTP_SIZE32(plen);
5006 * All parameters for all chunks that we know/understand are
5007 * listed here. We process them other places and make
5008 * appropriate stop actions per the upper bits. However this
5009 * is the generic routine processor's can call to get back
5010 * an operr.. to either incorporate (init-ack) or send.
5012 padded_size = SCTP_SIZE32(plen);
5014 /* Param's with variable size */
5015 case SCTP_HEARTBEAT_INFO:
5016 case SCTP_STATE_COOKIE:
5017 case SCTP_UNRECOG_PARAM:
5018 case SCTP_ERROR_CAUSE_IND:
5022 /* Param's with variable size within a range */
5023 case SCTP_CHUNK_LIST:
5024 case SCTP_SUPPORTED_CHUNK_EXT:
5025 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5026 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5031 case SCTP_SUPPORTED_ADDRTYPE:
5032 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5033 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5039 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5040 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5045 case SCTP_SET_PRIM_ADDR:
5046 case SCTP_DEL_IP_ADDRESS:
5047 case SCTP_ADD_IP_ADDRESS:
5048 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5049 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5055 /* Param's with a fixed size */
5056 case SCTP_IPV4_ADDRESS:
5057 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5063 case SCTP_IPV6_ADDRESS:
5064 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5065 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5070 case SCTP_COOKIE_PRESERVE:
5071 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5072 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5077 case SCTP_HAS_NAT_SUPPORT:
5080 case SCTP_PRSCTP_SUPPORTED:
5081 if (padded_size != sizeof(struct sctp_paramhdr)) {
5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5087 case SCTP_ECN_CAPABLE:
5088 if (padded_size != sizeof(struct sctp_paramhdr)) {
5089 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5094 case SCTP_ULP_ADAPTATION:
5095 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5096 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5101 case SCTP_SUCCESS_REPORT:
5102 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5103 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5108 case SCTP_HOSTNAME_ADDRESS:
5110 /* We can NOT handle HOST NAME addresses!! */
5113 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5114 *abort_processing = 1;
5115 if (op_err == NULL) {
5116 /* Ok need to try to get a mbuf */
5118 l_len = SCTP_MIN_OVERHEAD;
5120 l_len = SCTP_MIN_V4_OVERHEAD;
5122 l_len += sizeof(struct sctp_chunkhdr);
5124 l_len += sizeof(struct sctp_paramhdr);
5125 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5127 SCTP_BUF_LEN(op_err) = 0;
5129 * pre-reserve space for ip
5130 * and sctp header and
5134 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5136 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5138 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5139 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5143 /* If we have space */
5144 struct sctp_paramhdr s;
5147 uint32_t cpthis = 0;
5149 pad_needed = 4 - (err_at % 4);
5150 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5151 err_at += pad_needed;
5153 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5154 s.param_length = htons(sizeof(s) + plen);
5155 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5156 err_at += sizeof(s);
5157 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5159 sctp_m_freem(op_err);
5161 * we are out of memory but
5162 * we still need to have a
5163 * look at what to do (the
5164 * system is in trouble
5169 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5176 * we do not recognize the parameter figure out what
5179 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5180 if ((ptype & 0x4000) == 0x4000) {
5181 /* Report bit is set?? */
5182 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5183 if (op_err == NULL) {
5186 /* Ok need to try to get an mbuf */
5188 l_len = SCTP_MIN_OVERHEAD;
5190 l_len = SCTP_MIN_V4_OVERHEAD;
5192 l_len += sizeof(struct sctp_chunkhdr);
5194 l_len += sizeof(struct sctp_paramhdr);
5195 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5197 SCTP_BUF_LEN(op_err) = 0;
5199 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5201 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5203 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5204 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5208 /* If we have space */
5209 struct sctp_paramhdr s;
5212 uint32_t cpthis = 0;
5214 pad_needed = 4 - (err_at % 4);
5215 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5216 err_at += pad_needed;
5218 s.param_type = htons(SCTP_UNRECOG_PARAM);
5219 s.param_length = htons(sizeof(s) + plen);
5220 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5221 err_at += sizeof(s);
5222 if (plen > sizeof(tempbuf)) {
5223 plen = sizeof(tempbuf);
5225 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5227 sctp_m_freem(op_err);
5229 * we are out of memory but
5230 * we still need to have a
5231 * look at what to do (the
5232 * system is in trouble
5236 goto more_processing;
5238 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5243 if ((ptype & 0x8000) == 0x0000) {
5244 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5247 /* skip this chunk and continue processing */
5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5249 at += SCTP_SIZE32(plen);
5254 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5258 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5259 *abort_processing = 1;
5260 if ((op_err == NULL) && phdr) {
5264 l_len = SCTP_MIN_OVERHEAD;
5266 l_len = SCTP_MIN_V4_OVERHEAD;
5268 l_len += sizeof(struct sctp_chunkhdr);
5269 l_len += (2 * sizeof(struct sctp_paramhdr));
5270 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5272 SCTP_BUF_LEN(op_err) = 0;
5274 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5276 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5278 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5279 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5282 if ((op_err) && phdr) {
5283 struct sctp_paramhdr s;
5286 uint32_t cpthis = 0;
5288 pad_needed = 4 - (err_at % 4);
5289 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5290 err_at += pad_needed;
5292 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5293 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5294 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5295 err_at += sizeof(s);
5296 /* Only copy back the p-hdr that caused the issue */
5297 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5303 sctp_are_there_new_addresses(struct sctp_association *asoc,
5304 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5307 * Given a INIT packet, look through the packet to verify that there
5308 * are NO new addresses. As we go through the parameters add reports
5309 * of any un-understood parameters that require an error. Also we
5310 * must return (1) to drop the packet if we see a un-understood
5311 * parameter that tells us to drop the chunk.
5313 struct sockaddr *sa_touse;
5314 struct sockaddr *sa;
5315 struct sctp_paramhdr *phdr, params;
5316 uint16_t ptype, plen;
5318 struct sctp_nets *net;
5322 struct sockaddr_in sin4, *sa4;
5326 struct sockaddr_in6 sin6, *sa6;
5331 memset(&sin4, 0, sizeof(sin4));
5332 sin4.sin_family = AF_INET;
5333 sin4.sin_len = sizeof(sin4);
5336 memset(&sin6, 0, sizeof(sin6));
5337 sin6.sin6_family = AF_INET6;
5338 sin6.sin6_len = sizeof(sin6);
5340 /* First what about the src address of the pkt ? */
5342 switch (src->sa_family) {
5345 if (asoc->scope.ipv4_addr_legal) {
5352 if (asoc->scope.ipv6_addr_legal) {
5363 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5364 sa = (struct sockaddr *)&net->ro._l_addr;
5365 if (sa->sa_family == src->sa_family) {
5367 if (sa->sa_family == AF_INET) {
5368 struct sockaddr_in *src4;
5370 sa4 = (struct sockaddr_in *)sa;
5371 src4 = (struct sockaddr_in *)src;
5372 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5379 if (sa->sa_family == AF_INET6) {
5380 struct sockaddr_in6 *src6;
5382 sa6 = (struct sockaddr_in6 *)sa;
5383 src6 = (struct sockaddr_in6 *)src;
5384 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5393 /* New address added! no need to look further. */
5397 /* Ok so far lets munge through the rest of the packet */
5398 offset += sizeof(struct sctp_init_chunk);
5399 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5402 ptype = ntohs(phdr->param_type);
5403 plen = ntohs(phdr->param_length);
5406 case SCTP_IPV4_ADDRESS:
5408 struct sctp_ipv4addr_param *p4, p4_buf;
5410 phdr = sctp_get_next_param(in_initpkt, offset,
5411 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5412 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5416 if (asoc->scope.ipv4_addr_legal) {
5417 p4 = (struct sctp_ipv4addr_param *)phdr;
5418 sin4.sin_addr.s_addr = p4->addr;
5419 sa_touse = (struct sockaddr *)&sin4;
5425 case SCTP_IPV6_ADDRESS:
5427 struct sctp_ipv6addr_param *p6, p6_buf;
5429 phdr = sctp_get_next_param(in_initpkt, offset,
5430 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5431 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5435 if (asoc->scope.ipv6_addr_legal) {
5436 p6 = (struct sctp_ipv6addr_param *)phdr;
5437 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5439 sa_touse = (struct sockaddr *)&sin6;
5449 /* ok, sa_touse points to one to check */
5451 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5452 sa = (struct sockaddr *)&net->ro._l_addr;
5453 if (sa->sa_family != sa_touse->sa_family) {
5457 if (sa->sa_family == AF_INET) {
5458 sa4 = (struct sockaddr_in *)sa;
5459 if (sa4->sin_addr.s_addr ==
5460 sin4.sin_addr.s_addr) {
5467 if (sa->sa_family == AF_INET6) {
5468 sa6 = (struct sockaddr_in6 *)sa;
5469 if (SCTP6_ARE_ADDR_EQUAL(
5478 /* New addr added! no need to look further */
5482 offset += SCTP_SIZE32(plen);
5483 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5489 * Given a MBUF chain that was sent into us containing an INIT. Build a
5490 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5491 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5492 * message (i.e. the struct sctp_init_msg).
5495 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5496 struct sctp_nets *src_net, struct mbuf *init_pkt,
5497 int iphlen, int offset,
5498 struct sockaddr *src, struct sockaddr *dst,
5499 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5500 uint8_t mflowtype, uint32_t mflowid,
5501 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5503 struct sctp_association *asoc;
5504 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5505 struct sctp_init_ack_chunk *initack;
5506 struct sctp_adaptation_layer_indication *ali;
5507 struct sctp_supported_chunk_types_param *pr_supported;
5508 struct sctp_paramhdr *ph;
5509 union sctp_sockstore *over_addr;
5510 struct sctp_scoping scp;
5513 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5514 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5515 struct sockaddr_in *sin;
5519 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5520 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5521 struct sockaddr_in6 *sin6;
5524 struct sockaddr *to;
5525 struct sctp_state_cookie stc;
5526 struct sctp_nets *net = NULL;
5527 uint8_t *signature = NULL;
5528 int cnt_inits_to = 0;
5529 uint16_t his_limit, i_want;
5531 int nat_friendly = 0;
5533 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5540 if ((asoc != NULL) &&
5541 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5542 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5544 * new addresses, out of here in non-cookie-wait
5547 * Send an ABORT, without the new address error cause.
5548 * This looks no different than if no listener was
5551 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5553 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5554 mflowtype, mflowid, inp->fibnum,
5558 if (src_net != NULL && (src_net->port != port)) {
5560 * change of remote encapsulation port, out of here
5561 * in non-cookie-wait states
5563 * Send an ABORT, without an specific error cause. This
5564 * looks no different than if no listener was
5567 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5568 "Remote encapsulation port changed");
5569 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5570 mflowtype, mflowid, inp->fibnum,
5576 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5577 (offset + sizeof(struct sctp_init_chunk)),
5578 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5581 if (op_err == NULL) {
5582 char msg[SCTP_DIAG_INFO_LEN];
5584 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5585 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5588 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5589 init_chk->init.initiate_tag, op_err,
5590 mflowtype, mflowid, inp->fibnum,
5594 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5596 /* No memory, INIT timer will re-attempt. */
5598 sctp_m_freem(op_err);
5601 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5605 * We might not overwrite the identification[] completely and on
5606 * some platforms time_entered will contain some padding. Therefore
5607 * zero out the cookie to avoid putting uninitialized memory on the
5610 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5612 /* the time I built cookie */
5613 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5615 /* populate any tie tags */
5617 /* unlock before tag selections */
5618 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5619 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5620 stc.cookie_life = asoc->cookie_life;
5621 net = asoc->primary_destination;
5623 stc.tie_tag_my_vtag = 0;
5624 stc.tie_tag_peer_vtag = 0;
5625 /* life I will award this cookie */
5626 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5629 /* copy in the ports for later check */
5630 stc.myport = sh->dest_port;
5631 stc.peerport = sh->src_port;
5634 * If we wanted to honor cookie life extensions, we would add to
5635 * stc.cookie_life. For now we should NOT honor any extension
5637 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5638 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5639 stc.ipv6_addr_legal = 1;
5640 if (SCTP_IPV6_V6ONLY(inp)) {
5641 stc.ipv4_addr_legal = 0;
5643 stc.ipv4_addr_legal = 1;
5646 stc.ipv6_addr_legal = 0;
5647 stc.ipv4_addr_legal = 1;
5652 switch (dst->sa_family) {
5656 /* lookup address */
5657 stc.address[0] = src4->sin_addr.s_addr;
5661 stc.addr_type = SCTP_IPV4_ADDRESS;
5662 /* local from address */
5663 stc.laddress[0] = dst4->sin_addr.s_addr;
5664 stc.laddress[1] = 0;
5665 stc.laddress[2] = 0;
5666 stc.laddress[3] = 0;
5667 stc.laddr_type = SCTP_IPV4_ADDRESS;
5668 /* scope_id is only for v6 */
5670 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5671 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5674 /* Must use the address in this case */
5675 if (sctp_is_address_on_local_host(src, vrf_id)) {
5676 stc.loopback_scope = 1;
5679 stc.local_scope = 0;
5687 stc.addr_type = SCTP_IPV6_ADDRESS;
5688 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5689 stc.scope_id = ntohs(in6_getscope(&src6->sin6_addr));
5690 if (sctp_is_address_on_local_host(src, vrf_id)) {
5691 stc.loopback_scope = 1;
5692 stc.local_scope = 0;
5695 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5696 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5698 * If the new destination or source
5699 * is a LINK_LOCAL we must have
5700 * common both site and local scope.
5701 * Don't set local scope though
5702 * since we must depend on the
5703 * source to be added implicitly. We
5704 * cannot assure just because we
5705 * share one link that all links are
5708 stc.local_scope = 0;
5712 * we start counting for the private
5713 * address stuff at 1. since the
5714 * link local we source from won't
5715 * show up in our scoped count.
5719 * pull out the scope_id from
5722 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5723 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5725 * If the new destination or source
5726 * is SITE_LOCAL then we must have
5727 * site scope in common.
5731 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5732 stc.laddr_type = SCTP_IPV6_ADDRESS;
5742 /* set the scope per the existing tcb */
5745 struct sctp_nets *lnet;
5749 stc.loopback_scope = asoc->scope.loopback_scope;
5750 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5751 stc.site_scope = asoc->scope.site_scope;
5752 stc.local_scope = asoc->scope.local_scope;
5754 /* Why do we not consider IPv4 LL addresses? */
5755 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5756 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5757 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5759 * if we have a LL address, start
5767 /* use the net pointer */
5768 to = (struct sockaddr *)&net->ro._l_addr;
5769 switch (to->sa_family) {
5772 sin = (struct sockaddr_in *)to;
5773 stc.address[0] = sin->sin_addr.s_addr;
5777 stc.addr_type = SCTP_IPV4_ADDRESS;
5778 if (net->src_addr_selected == 0) {
5780 * strange case here, the INIT should have
5781 * did the selection.
5783 net->ro._s_addr = sctp_source_address_selection(inp,
5784 stcb, (sctp_route_t *) & net->ro,
5786 if (net->ro._s_addr == NULL)
5789 net->src_addr_selected = 1;
5792 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5793 stc.laddress[1] = 0;
5794 stc.laddress[2] = 0;
5795 stc.laddress[3] = 0;
5796 stc.laddr_type = SCTP_IPV4_ADDRESS;
5797 /* scope_id is only for v6 */
5803 sin6 = (struct sockaddr_in6 *)to;
5804 memcpy(&stc.address, &sin6->sin6_addr,
5805 sizeof(struct in6_addr));
5806 stc.addr_type = SCTP_IPV6_ADDRESS;
5807 stc.scope_id = sin6->sin6_scope_id;
5808 if (net->src_addr_selected == 0) {
5810 * strange case here, the INIT should have
5811 * done the selection.
5813 net->ro._s_addr = sctp_source_address_selection(inp,
5814 stcb, (sctp_route_t *) & net->ro,
5816 if (net->ro._s_addr == NULL)
5819 net->src_addr_selected = 1;
5821 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5822 sizeof(struct in6_addr));
5823 stc.laddr_type = SCTP_IPV6_ADDRESS;
5828 /* Now lets put the SCTP header in place */
5829 initack = mtod(m, struct sctp_init_ack_chunk *);
5830 /* Save it off for quick ref */
5831 stc.peers_vtag = ntohl(init_chk->init.initiate_tag);
5833 memcpy(stc.identification, SCTP_VERSION_STRING,
5834 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5835 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5836 /* now the chunk header */
5837 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5838 initack->ch.chunk_flags = 0;
5839 /* fill in later from mbuf we build */
5840 initack->ch.chunk_length = 0;
5841 /* place in my tag */
5842 if ((asoc != NULL) &&
5843 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5844 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5845 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5846 /* re-use the v-tags and init-seq here */
5847 initack->init.initiate_tag = htonl(asoc->my_vtag);
5848 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5850 uint32_t vtag, itsn;
5852 if (hold_inp_lock) {
5853 SCTP_INP_INCR_REF(inp);
5854 SCTP_INP_RUNLOCK(inp);
5857 atomic_add_int(&asoc->refcnt, 1);
5858 SCTP_TCB_UNLOCK(stcb);
5860 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5861 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5863 * Got a duplicate vtag on some guy behind a
5864 * nat make sure we don't use it.
5868 initack->init.initiate_tag = htonl(vtag);
5869 /* get a TSN to use too */
5870 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5871 initack->init.initial_tsn = htonl(itsn);
5872 SCTP_TCB_LOCK(stcb);
5873 atomic_add_int(&asoc->refcnt, -1);
5875 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5876 initack->init.initiate_tag = htonl(vtag);
5877 /* get a TSN to use too */
5878 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5880 if (hold_inp_lock) {
5881 SCTP_INP_RLOCK(inp);
5882 SCTP_INP_DECR_REF(inp);
5885 /* save away my tag to */
5886 stc.my_vtag = initack->init.initiate_tag;
5888 /* set up some of the credits. */
5889 so = inp->sctp_socket;
5891 /* memory problem */
5895 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5897 /* set what I want */
5898 his_limit = ntohs(init_chk->init.num_inbound_streams);
5899 /* choose what I want */
5901 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5902 i_want = asoc->streamoutcnt;
5904 i_want = asoc->pre_open_streams;
5907 i_want = inp->sctp_ep.pre_open_stream_count;
5909 if (his_limit < i_want) {
5910 /* I Want more :< */
5911 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5913 /* I can have what I want :> */
5914 initack->init.num_outbound_streams = htons(i_want);
5916 /* tell him his limit. */
5917 initack->init.num_inbound_streams =
5918 htons(inp->sctp_ep.max_open_streams_intome);
5920 /* adaptation layer indication parameter */
5921 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5922 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5923 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5924 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5925 ali->ph.param_length = htons(parameter_len);
5926 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5927 chunk_len += parameter_len;
5930 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5931 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5932 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5933 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5934 ph->param_type = htons(SCTP_ECN_CAPABLE);
5935 ph->param_length = htons(parameter_len);
5936 chunk_len += parameter_len;
5938 /* PR-SCTP supported parameter */
5939 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5940 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5941 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5942 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5943 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5944 ph->param_length = htons(parameter_len);
5945 chunk_len += parameter_len;
5947 /* Add NAT friendly parameter */
5949 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5950 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5951 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5952 ph->param_length = htons(parameter_len);
5953 chunk_len += parameter_len;
5955 /* And now tell the peer which extensions we support */
5957 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5958 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5959 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5960 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5961 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5962 ((asoc == NULL) && (inp->idata_supported == 1))) {
5963 pr_supported->chunk_types[num_ext++] = SCTP_IFORWARD_CUM_TSN;
5966 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5967 ((asoc == NULL) && (inp->auth_supported == 1))) {
5968 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5970 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5971 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5972 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5973 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5975 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5976 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5977 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5979 if (((asoc != NULL) && (asoc->idata_supported == 1)) ||
5980 ((asoc == NULL) && (inp->idata_supported == 1))) {
5981 pr_supported->chunk_types[num_ext++] = SCTP_IDATA;
5983 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5984 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5985 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5987 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5988 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5989 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5992 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5993 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5994 pr_supported->ph.param_length = htons(parameter_len);
5995 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5996 chunk_len += parameter_len;
5998 /* add authentication parameters */
5999 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
6000 ((asoc == NULL) && (inp->auth_supported == 1))) {
6001 struct sctp_auth_random *randp;
6002 struct sctp_auth_hmac_algo *hmacs;
6003 struct sctp_auth_chunk_list *chunks;
6005 if (padding_len > 0) {
6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6007 chunk_len += padding_len;
6010 /* generate and add RANDOM parameter */
6011 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
6012 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
6013 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
6014 randp->ph.param_type = htons(SCTP_RANDOM);
6015 randp->ph.param_length = htons(parameter_len);
6016 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6018 chunk_len += parameter_len;
6020 if (padding_len > 0) {
6021 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6022 chunk_len += padding_len;
6025 /* add HMAC_ALGO parameter */
6026 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6027 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
6028 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6029 (uint8_t *) hmacs->hmac_ids);
6030 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6031 hmacs->ph.param_length = htons(parameter_len);
6032 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6033 chunk_len += parameter_len;
6035 if (padding_len > 0) {
6036 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6037 chunk_len += padding_len;
6040 /* add CHUNKS parameter */
6041 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6042 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6043 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6044 chunks->chunk_types);
6045 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6046 chunks->ph.param_length = htons(parameter_len);
6047 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6048 chunk_len += parameter_len;
6050 SCTP_BUF_LEN(m) = chunk_len;
6052 /* now the addresses */
6054 * To optimize this we could put the scoping stuff into a structure
6055 * and remove the individual uint8's from the stc structure. Then we
6056 * could just sifa in the address within the stc.. but for now this
6057 * is a quick hack to get the address stuff teased apart.
6059 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6060 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6061 scp.loopback_scope = stc.loopback_scope;
6062 scp.ipv4_local_scope = stc.ipv4_scope;
6063 scp.local_scope = stc.local_scope;
6064 scp.site_scope = stc.site_scope;
6065 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6067 &padding_len, &chunk_len);
6068 /* padding_len can only be positive, if no addresses have been added */
6069 if (padding_len > 0) {
6070 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6071 chunk_len += padding_len;
6072 SCTP_BUF_LEN(m) += padding_len;
6075 /* tack on the operational error if present */
6078 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6079 parameter_len += SCTP_BUF_LEN(m_tmp);
6081 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6082 SCTP_BUF_NEXT(m_last) = op_err;
6083 while (SCTP_BUF_NEXT(m_last) != NULL) {
6084 m_last = SCTP_BUF_NEXT(m_last);
6086 chunk_len += parameter_len;
6088 if (padding_len > 0) {
6089 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6090 if (m_last == NULL) {
6091 /* Houston we have a problem, no space */
6095 chunk_len += padding_len;
6098 /* Now we must build a cookie */
6099 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6100 if (m_cookie == NULL) {
6101 /* memory problem */
6105 /* Now append the cookie to the end and update the space/size */
6106 SCTP_BUF_NEXT(m_last) = m_cookie;
6108 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6109 parameter_len += SCTP_BUF_LEN(m_tmp);
6110 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6114 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6115 chunk_len += parameter_len;
6118 * Place in the size, but we don't include the last pad (if any) in
6121 initack->ch.chunk_length = htons(chunk_len);
6124 * Time to sign the cookie, we don't sign over the cookie signature
6125 * though thus we set trailer.
6127 (void)sctp_hmac_m(SCTP_HMAC,
6128 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6129 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6130 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6132 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6133 * here since the timer will drive a retranmission.
6135 if (padding_len > 0) {
6136 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6141 if (stc.loopback_scope) {
6142 over_addr = (union sctp_sockstore *)dst;
6147 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6149 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6152 SCTP_SO_NOT_LOCKED);
6153 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6158 sctp_prune_prsctp(struct sctp_tcb *stcb,
6159 struct sctp_association *asoc,
6160 struct sctp_sndrcvinfo *srcv,
6164 struct sctp_tmit_chunk *chk, *nchk;
6166 SCTP_TCB_LOCK_ASSERT(stcb);
6167 if ((asoc->prsctp_supported) &&
6168 (asoc->sent_queue_cnt_removeable > 0)) {
6169 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6171 * Look for chunks marked with the PR_SCTP flag AND
6172 * the buffer space flag. If the one being sent is
6173 * equal or greater priority then purge the old one
6174 * and free some space.
6176 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6178 * This one is PR-SCTP AND buffer space
6181 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6183 * Lower numbers equates to higher
6184 * priority so if the one we are
6185 * looking at has a larger or equal
6186 * priority we want to drop the data
6187 * and NOT retransmit it.
6191 * We release the book_size
6192 * if the mbuf is here
6197 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6201 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6204 freed_spc += ret_spc;
6205 if (freed_spc >= dataout) {
6208 } /* if chunk was present */
6209 } /* if of sufficient priority */
6210 } /* if chunk has enabled */
6211 } /* tailqforeach */
6213 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6214 /* Here we must move to the sent queue and mark */
6215 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6216 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6219 * We release the book_size
6220 * if the mbuf is here
6224 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6227 freed_spc += ret_spc;
6228 if (freed_spc >= dataout) {
6231 } /* end if chk->data */
6232 } /* end if right class */
6233 } /* end if chk pr-sctp */
6234 } /* tailqforeachsafe (chk) */
6235 } /* if enabled in asoc */
6239 sctp_get_frag_point(struct sctp_tcb *stcb,
6240 struct sctp_association *asoc)
6245 * For endpoints that have both v6 and v4 addresses we must reserve
6246 * room for the ipv6 header, for those that are only dealing with V4
6247 * we use a larger frag point.
6249 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6250 ovh = SCTP_MIN_OVERHEAD;
6252 ovh = SCTP_MIN_V4_OVERHEAD;
6254 if (stcb->asoc.idata_supported) {
6255 ovh += sizeof(struct sctp_idata_chunk);
6257 ovh += sizeof(struct sctp_data_chunk);
6259 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6260 siz = asoc->smallest_mtu - ovh;
6262 siz = (stcb->asoc.sctp_frag_point - ovh);
6264 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6266 /* A data chunk MUST fit in a cluster */
6267 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6270 /* adjust for an AUTH chunk if DATA requires auth */
6271 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6272 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6275 /* make it an even word boundary please */
6282 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6285 * We assume that the user wants PR_SCTP_TTL if the user provides a
6286 * positive lifetime but does not specify any PR_SCTP policy.
6288 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6289 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6290 } else if (sp->timetolive > 0) {
6291 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6292 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6296 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6297 case CHUNK_FLAGS_PR_SCTP_BUF:
6299 * Time to live is a priority stored in tv_sec when doing
6300 * the buffer drop thing.
6302 sp->ts.tv_sec = sp->timetolive;
6305 case CHUNK_FLAGS_PR_SCTP_TTL:
6309 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6310 tv.tv_sec = sp->timetolive / 1000;
6311 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6313 * TODO sctp_constants.h needs alternative time
6314 * macros when _KERNEL is undefined.
6316 timevaladd(&sp->ts, &tv);
6319 case CHUNK_FLAGS_PR_SCTP_RTX:
6321 * Time to live is a the number or retransmissions stored in
6324 sp->ts.tv_sec = sp->timetolive;
6328 SCTPDBG(SCTP_DEBUG_USRREQ1,
6329 "Unknown PR_SCTP policy %u.\n",
6330 PR_SCTP_POLICY(sp->sinfo_flags));
6336 sctp_msg_append(struct sctp_tcb *stcb,
6337 struct sctp_nets *net,
6339 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6343 struct sctp_stream_queue_pending *sp = NULL;
6344 struct sctp_stream_out *strm;
6347 * Given an mbuf chain, put it into the association send queue and
6348 * place it on the wheel
6350 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6351 /* Invalid stream number */
6352 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6356 if ((stcb->asoc.stream_locked) &&
6357 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6358 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6362 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6363 /* Now can we send this? */
6364 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6365 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6366 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6367 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6368 /* got data while shutting down */
6369 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6373 sctp_alloc_a_strmoq(stcb, sp);
6375 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6379 sp->sinfo_flags = srcv->sinfo_flags;
6380 sp->timetolive = srcv->sinfo_timetolive;
6381 sp->ppid = srcv->sinfo_ppid;
6382 sp->context = srcv->sinfo_context;
6384 sp->msg_id = atomic_fetchadd_int(&stcb->asoc.assoc_msg_id, 1);
6385 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6387 atomic_add_int(&sp->net->ref_count, 1);
6391 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6392 sp->stream = srcv->sinfo_stream;
6393 sp->msg_is_complete = 1;
6394 sp->sender_all_done = 1;
6397 sp->tail_mbuf = NULL;
6398 sctp_set_prsctp_policy(sp);
6400 * We could in theory (for sendall) sifa the length in, but we would
6401 * still have to hunt through the chain since we need to setup the
6405 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6406 if (SCTP_BUF_NEXT(at) == NULL)
6408 sp->length += SCTP_BUF_LEN(at);
6410 if (srcv->sinfo_keynumber_valid) {
6411 sp->auth_keyid = srcv->sinfo_keynumber;
6413 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6415 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6416 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6417 sp->holds_key_ref = 1;
6419 if (hold_stcb_lock == 0) {
6420 SCTP_TCB_SEND_LOCK(stcb);
6422 sctp_snd_sb_alloc(stcb, sp->length);
6423 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6424 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6425 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6427 if (hold_stcb_lock == 0) {
6428 SCTP_TCB_SEND_UNLOCK(stcb);
6438 static struct mbuf *
6439 sctp_copy_mbufchain(struct mbuf *clonechain,
6440 struct mbuf *outchain,
6441 struct mbuf **endofchain,
6444 uint8_t copy_by_ref)
6447 struct mbuf *appendchain;
6451 if (endofchain == NULL) {
6455 sctp_m_freem(outchain);
6458 if (can_take_mbuf) {
6459 appendchain = clonechain;
6462 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6464 /* Its not in a cluster */
6465 if (*endofchain == NULL) {
6466 /* lets get a mbuf cluster */
6467 if (outchain == NULL) {
6468 /* This is the general case */
6470 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6471 if (outchain == NULL) {
6474 SCTP_BUF_LEN(outchain) = 0;
6475 *endofchain = outchain;
6476 /* get the prepend space */
6477 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6480 * We really should not get a NULL
6486 if (SCTP_BUF_NEXT(m) == NULL) {
6490 m = SCTP_BUF_NEXT(m);
6493 if (*endofchain == NULL) {
6495 * huh, TSNH XXX maybe we
6498 sctp_m_freem(outchain);
6502 /* get the new end of length */
6503 len = (int)M_TRAILINGSPACE(*endofchain);
6505 /* how much is left at the end? */
6506 len = (int)M_TRAILINGSPACE(*endofchain);
6508 /* Find the end of the data, for appending */
6509 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6511 /* Now lets copy it out */
6512 if (len >= sizeofcpy) {
6513 /* It all fits, copy it in */
6514 m_copydata(clonechain, 0, sizeofcpy, cp);
6515 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6517 /* fill up the end of the chain */
6519 m_copydata(clonechain, 0, len, cp);
6520 SCTP_BUF_LEN((*endofchain)) += len;
6521 /* now we need another one */
6524 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6529 SCTP_BUF_NEXT((*endofchain)) = m;
6531 cp = mtod((*endofchain), caddr_t);
6532 m_copydata(clonechain, len, sizeofcpy, cp);
6533 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6537 /* copy the old fashion way */
6538 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6539 #ifdef SCTP_MBUF_LOGGING
6540 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6541 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6546 if (appendchain == NULL) {
6549 sctp_m_freem(outchain);
6553 /* tack on to the end */
6554 if (*endofchain != NULL) {
6555 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6559 if (SCTP_BUF_NEXT(m) == NULL) {
6560 SCTP_BUF_NEXT(m) = appendchain;
6563 m = SCTP_BUF_NEXT(m);
6567 * save off the end and update the end-chain position
6571 if (SCTP_BUF_NEXT(m) == NULL) {
6575 m = SCTP_BUF_NEXT(m);
6579 /* save off the end and update the end-chain position */
6582 if (SCTP_BUF_NEXT(m) == NULL) {
6586 m = SCTP_BUF_NEXT(m);
6588 return (appendchain);
6593 sctp_med_chunk_output(struct sctp_inpcb *inp,
6594 struct sctp_tcb *stcb,
6595 struct sctp_association *asoc,
6598 int control_only, int from_where,
6599 struct timeval *now, int *now_filled, int frag_point, int so_locked
6600 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6606 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6607 uint32_t val SCTP_UNUSED)
6609 struct sctp_copy_all *ca;
6612 int added_control = 0;
6613 int un_sent, do_chunk_output = 1;
6614 struct sctp_association *asoc;
6615 struct sctp_nets *net;
6617 ca = (struct sctp_copy_all *)ptr;
6618 if (ca->m == NULL) {
6621 if (ca->inp != inp) {
6625 if (ca->sndlen > 0) {
6626 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6628 /* can't copy so we are done */
6632 #ifdef SCTP_MBUF_LOGGING
6633 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6634 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6640 SCTP_TCB_LOCK_ASSERT(stcb);
6641 if (stcb->asoc.alternate) {
6642 net = stcb->asoc.alternate;
6644 net = stcb->asoc.primary_destination;
6646 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6647 /* Abort this assoc with m as the user defined reason */
6649 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6651 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6652 0, M_NOWAIT, 1, MT_DATA);
6653 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6656 struct sctp_paramhdr *ph;
6658 ph = mtod(m, struct sctp_paramhdr *);
6659 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6660 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + ca->sndlen));
6663 * We add one here to keep the assoc from dis-appearing on
6666 atomic_add_int(&stcb->asoc.refcnt, 1);
6667 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6669 * sctp_abort_an_association calls sctp_free_asoc() free
6670 * association will NOT free it since we incremented the
6671 * refcnt .. we do this to prevent it being freed and things
6672 * getting tricky since we could end up (from free_asoc)
6673 * calling inpcb_free which would get a recursive lock call
6674 * to the iterator lock.. But as a consequence of that the
6675 * stcb will return to us un-locked.. since free_asoc
6676 * returns with either no TCB or the TCB unlocked, we must
6677 * relock.. to unlock in the iterator timer :-0
6679 SCTP_TCB_LOCK(stcb);
6680 atomic_add_int(&stcb->asoc.refcnt, -1);
6681 goto no_chunk_output;
6684 ret = sctp_msg_append(stcb, net, m,
6688 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6689 /* shutdown this assoc */
6692 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6694 if (TAILQ_EMPTY(&asoc->send_queue) &&
6695 TAILQ_EMPTY(&asoc->sent_queue) &&
6697 if (asoc->locked_on_sending) {
6701 * there is nothing queued to send, so I'm
6704 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6705 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6706 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6708 * only send SHUTDOWN the first time
6711 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6712 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6714 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6715 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6716 sctp_stop_timers_for_shutdown(stcb);
6717 sctp_send_shutdown(stcb, net);
6718 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6720 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6721 asoc->primary_destination);
6723 do_chunk_output = 0;
6727 * we still got (or just got) data to send,
6728 * so set SHUTDOWN_PENDING
6731 * XXX sockets draft says that SCTP_EOF
6732 * should be sent with no data. currently,
6733 * we will allow user data to be sent first
6734 * and move to SHUTDOWN-PENDING
6736 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6737 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6738 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6739 if (asoc->locked_on_sending) {
6741 * Locked to send out the
6744 struct sctp_stream_queue_pending *sp;
6746 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6748 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6749 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6752 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6753 if (TAILQ_EMPTY(&asoc->send_queue) &&
6754 TAILQ_EMPTY(&asoc->sent_queue) &&
6755 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6756 struct mbuf *op_err;
6757 char msg[SCTP_DIAG_INFO_LEN];
6760 snprintf(msg, sizeof(msg),
6761 "%s:%d at %s", __FILE__, __LINE__, __func__);
6762 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6764 atomic_add_int(&stcb->asoc.refcnt, 1);
6765 sctp_abort_an_association(stcb->sctp_ep, stcb,
6766 op_err, SCTP_SO_NOT_LOCKED);
6767 atomic_add_int(&stcb->asoc.refcnt, -1);
6768 goto no_chunk_output;
6770 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6771 asoc->primary_destination);
6777 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6778 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6780 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6781 (stcb->asoc.total_flight > 0) &&
6782 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6783 do_chunk_output = 0;
6785 if (do_chunk_output)
6786 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6787 else if (added_control) {
6788 int num_out, reason, now_filled = 0;
6792 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6793 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6794 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6805 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6807 struct sctp_copy_all *ca;
6809 ca = (struct sctp_copy_all *)ptr;
6811 * Do a notify here? Kacheong suggests that the notify be done at
6812 * the send time.. so you would push up a notification if any send
6813 * failed. Don't know if this is feasible since the only failures we
6814 * have is "memory" related and if you cannot get an mbuf to send
6815 * the data you surely can't get an mbuf to send up to notify the
6816 * user you can't send the data :->
6819 /* now free everything */
6820 sctp_m_freem(ca->m);
6821 SCTP_FREE(ca, SCTP_M_COPYAL);
6824 static struct mbuf *
6825 sctp_copy_out_all(struct uio *uio, int len)
6827 struct mbuf *ret, *at;
6828 int left, willcpy, cancpy, error;
6830 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6836 SCTP_BUF_LEN(ret) = 0;
6837 /* save space for the data chunk header */
6838 cancpy = (int)M_TRAILINGSPACE(ret);
6839 willcpy = min(cancpy, left);
6842 /* Align data to the end */
6843 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6849 SCTP_BUF_LEN(at) = willcpy;
6850 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6853 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6854 if (SCTP_BUF_NEXT(at) == NULL) {
6857 at = SCTP_BUF_NEXT(at);
6858 SCTP_BUF_LEN(at) = 0;
6859 cancpy = (int)M_TRAILINGSPACE(at);
6860 willcpy = min(cancpy, left);
6867 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6868 struct sctp_sndrcvinfo *srcv)
6871 struct sctp_copy_all *ca;
6873 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6880 memset(ca, 0, sizeof(struct sctp_copy_all));
6884 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6887 * take off the sendall flag, it would be bad if we failed to do
6890 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6891 /* get length and mbuf chain */
6893 ca->sndlen = (int)uio->uio_resid;
6894 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6895 if (ca->m == NULL) {
6896 SCTP_FREE(ca, SCTP_M_COPYAL);
6897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6901 /* Gather the length of the send */
6905 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6906 ca->sndlen += SCTP_BUF_LEN(mat);
6909 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6910 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6911 SCTP_ASOC_ANY_STATE,
6913 sctp_sendall_completes, inp, 1);
6915 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6916 SCTP_FREE(ca, SCTP_M_COPYAL);
6917 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6925 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6927 struct sctp_tmit_chunk *chk, *nchk;
6929 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6930 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6931 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6933 sctp_m_freem(chk->data);
6936 asoc->ctrl_queue_cnt--;
6937 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6943 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6945 struct sctp_association *asoc;
6946 struct sctp_tmit_chunk *chk, *nchk;
6947 struct sctp_asconf_chunk *acp;
6950 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6951 /* find SCTP_ASCONF chunk in queue */
6952 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6954 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6955 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6960 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6962 sctp_m_freem(chk->data);
6965 asoc->ctrl_queue_cnt--;
6966 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6973 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6974 struct sctp_association *asoc,
6975 struct sctp_tmit_chunk **data_list,
6977 struct sctp_nets *net)
6980 struct sctp_tmit_chunk *tp1;
6982 for (i = 0; i < bundle_at; i++) {
6983 /* off of the send queue */
6984 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6985 asoc->send_queue_cnt--;
6988 * Any chunk NOT 0 you zap the time chunk 0 gets
6989 * zapped or set based on if a RTO measurment is
6992 data_list[i]->do_rtt = 0;
6995 data_list[i]->sent_rcv_time = net->last_sent_time;
6996 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6997 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6998 if (data_list[i]->whoTo == NULL) {
6999 data_list[i]->whoTo = net;
7000 atomic_add_int(&net->ref_count, 1);
7002 /* on to the sent queue */
7003 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
7004 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
7005 struct sctp_tmit_chunk *tpp;
7007 /* need to move back */
7009 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
7011 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
7015 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
7018 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
7020 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7025 /* This does not lower until the cum-ack passes it */
7026 asoc->sent_queue_cnt++;
7027 if ((asoc->peers_rwnd <= 0) &&
7028 (asoc->total_flight == 0) &&
7030 /* Mark the chunk as being a window probe */
7031 SCTP_STAT_INCR(sctps_windowprobed);
7033 #ifdef SCTP_AUDITING_ENABLED
7034 sctp_audit_log(0xC2, 3);
7036 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7037 data_list[i]->snd_count = 1;
7038 data_list[i]->rec.data.chunk_was_revoked = 0;
7039 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7040 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7041 data_list[i]->whoTo->flight_size,
7042 data_list[i]->book_size,
7043 (uint32_t) (uintptr_t) data_list[i]->whoTo,
7044 data_list[i]->rec.data.TSN_seq);
7046 sctp_flight_size_increase(data_list[i]);
7047 sctp_total_flight_increase(stcb, data_list[i]);
7048 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7049 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7050 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7052 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7053 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7054 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7055 /* SWS sender side engages */
7056 asoc->peers_rwnd = 0;
7059 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7060 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7065 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7066 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7071 struct sctp_tmit_chunk *chk, *nchk;
7073 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7074 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7075 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7076 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7077 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7078 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7079 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7080 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7081 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7082 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7083 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7084 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7085 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7086 /* Stray chunks must be cleaned up */
7088 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7090 sctp_m_freem(chk->data);
7093 asoc->ctrl_queue_cnt--;
7094 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7095 asoc->fwd_tsn_cnt--;
7096 sctp_free_a_chunk(stcb, chk, so_locked);
7097 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7098 /* special handling, we must look into the param */
7099 if (chk != asoc->str_reset) {
7100 goto clean_up_anyway;
7108 sctp_can_we_split_this(struct sctp_tcb *stcb,
7110 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7113 * Make a decision on if I should split a msg into multiple parts.
7114 * This is only asked of incomplete messages.
7118 * If we are doing EEOR we need to always send it if its the
7119 * entire thing, since it might be all the guy is putting in
7122 if (goal_mtu >= length) {
7124 * If we have data outstanding,
7125 * we get another chance when the sack
7126 * arrives to transmit - wait for more data
7128 if (stcb->asoc.total_flight == 0) {
7130 * If nothing is in flight, we zero the
7138 /* You can fill the rest */
7143 * For those strange folk that make the send buffer
7144 * smaller than our fragmentation point, we can't
7145 * get a full msg in so we have to allow splitting.
7147 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7150 if ((length <= goal_mtu) ||
7151 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7152 /* Sub-optimial residual don't split in non-eeor mode. */
7156 * If we reach here length is larger than the goal_mtu. Do we wish
7157 * to split it for the sake of packet putting together?
7159 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7160 /* Its ok to split it */
7161 return (min(goal_mtu, frag_point));
7163 /* Nope, can't split */
7169 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7170 struct sctp_stream_out *strq,
7172 uint32_t frag_point,
7178 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7183 /* Move from the stream to the send_queue keeping track of the total */
7184 struct sctp_association *asoc;
7185 struct sctp_stream_queue_pending *sp;
7186 struct sctp_tmit_chunk *chk;
7187 struct sctp_data_chunk *dchkh = NULL;
7188 struct sctp_idata_chunk *ndchkh = NULL;
7189 uint32_t to_move, length;
7191 uint8_t rcv_flags = 0;
7193 uint8_t send_lock_up = 0;
7195 SCTP_TCB_LOCK_ASSERT(stcb);
7198 /* sa_ignore FREED_MEMORY */
7200 sp = TAILQ_FIRST(&strq->outqueue);
7203 if (send_lock_up == 0) {
7204 SCTP_TCB_SEND_LOCK(stcb);
7207 sp = TAILQ_FIRST(&strq->outqueue);
7211 if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_EXPLICIT_EOR) == 0) &&
7212 (stcb->asoc.idata_supported == 0) &&
7213 (strq->last_msg_incomplete)) {
7214 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7216 strq->last_msg_incomplete);
7217 strq->last_msg_incomplete = 0;
7221 SCTP_TCB_SEND_UNLOCK(stcb);
7226 if ((sp->msg_is_complete) && (sp->length == 0)) {
7227 if (sp->sender_all_done) {
7229 * We are doing differed cleanup. Last time through
7230 * when we took all the data the sender_all_done was
7233 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7234 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7235 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7236 sp->sender_all_done,
7238 sp->msg_is_complete,
7242 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7243 SCTP_TCB_SEND_LOCK(stcb);
7246 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7247 TAILQ_REMOVE(&strq->outqueue, sp, next);
7248 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7249 (strq->chunks_on_queues == 0) &&
7250 TAILQ_EMPTY(&strq->outqueue)) {
7251 stcb->asoc.trigger_reset = 1;
7253 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7255 sctp_free_remote_addr(sp->net);
7259 sctp_m_freem(sp->data);
7262 sctp_free_a_strmoq(stcb, sp, so_locked);
7263 /* we can't be locked to it */
7265 stcb->asoc.locked_on_sending = NULL;
7267 SCTP_TCB_SEND_UNLOCK(stcb);
7270 /* back to get the next msg */
7274 * sender just finished this but still holds a
7277 if (stcb->asoc.idata_supported == 0)
7284 /* is there some to get */
7285 if (sp->length == 0) {
7287 if (stcb->asoc.idata_supported == 0)
7292 } else if (sp->discard_rest) {
7293 if (send_lock_up == 0) {
7294 SCTP_TCB_SEND_LOCK(stcb);
7297 /* Whack down the size */
7298 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7299 if ((stcb->sctp_socket != NULL) &&
7300 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7301 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7302 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7305 sctp_m_freem(sp->data);
7307 sp->tail_mbuf = NULL;
7311 if (stcb->asoc.idata_supported == 0)
7318 some_taken = sp->some_taken;
7320 length = sp->length;
7321 if (sp->msg_is_complete) {
7322 /* The message is complete */
7323 to_move = min(length, frag_point);
7324 if (to_move == length) {
7325 /* All of it fits in the MTU */
7326 if (sp->some_taken) {
7327 rcv_flags |= SCTP_DATA_LAST_FRAG;
7328 sp->put_last_out = 1;
7330 rcv_flags |= SCTP_DATA_NOT_FRAG;
7331 sp->put_last_out = 1;
7334 /* Not all of it fits, we fragment */
7335 if (sp->some_taken == 0) {
7336 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7341 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7344 * We use a snapshot of length in case it
7345 * is expanding during the compare.
7350 if (to_move >= llen) {
7352 if (send_lock_up == 0) {
7354 * We are taking all of an incomplete msg
7355 * thus we need a send lock.
7357 SCTP_TCB_SEND_LOCK(stcb);
7359 if (sp->msg_is_complete) {
7361 * the sender finished the
7368 if (sp->some_taken == 0) {
7369 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7373 /* Nothing to take. */
7374 if ((sp->some_taken) &&
7375 (stcb->asoc.idata_supported == 0)) {
7384 /* If we reach here, we can copy out a chunk */
7385 sctp_alloc_a_chunk(stcb, chk);
7387 /* No chunk memory */
7393 * Setup for unordered if needed by looking at the user sent info
7396 if (sp->sinfo_flags & SCTP_UNORDERED) {
7397 rcv_flags |= SCTP_DATA_UNORDERED;
7399 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7400 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7401 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7403 /* clear out the chunk before setting up */
7404 memset(chk, 0, sizeof(*chk));
7405 chk->rec.data.rcv_flags = rcv_flags;
7407 if (to_move >= length) {
7408 /* we think we can steal the whole thing */
7409 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7410 SCTP_TCB_SEND_LOCK(stcb);
7413 if (to_move < sp->length) {
7414 /* bail, it changed */
7417 chk->data = sp->data;
7418 chk->last_mbuf = sp->tail_mbuf;
7419 /* register the stealing */
7420 sp->data = sp->tail_mbuf = NULL;
7425 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7426 chk->last_mbuf = NULL;
7427 if (chk->data == NULL) {
7428 sp->some_taken = some_taken;
7429 sctp_free_a_chunk(stcb, chk, so_locked);
7434 #ifdef SCTP_MBUF_LOGGING
7435 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7436 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7439 /* Pull off the data */
7440 m_adj(sp->data, to_move);
7441 /* Now lets work our way down and compact it */
7443 while (m && (SCTP_BUF_LEN(m) == 0)) {
7444 sp->data = SCTP_BUF_NEXT(m);
7445 SCTP_BUF_NEXT(m) = NULL;
7446 if (sp->tail_mbuf == m) {
7448 * Freeing tail? TSNH since
7449 * we supposedly were taking less
7450 * than the sp->length.
7453 panic("Huh, freing tail? - TSNH");
7455 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7456 sp->tail_mbuf = sp->data = NULL;
7465 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7466 chk->copy_by_ref = 1;
7468 chk->copy_by_ref = 0;
7471 * get last_mbuf and counts of mb usage This is ugly but hopefully
7472 * its only one mbuf.
7474 if (chk->last_mbuf == NULL) {
7475 chk->last_mbuf = chk->data;
7476 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7477 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7480 if (to_move > length) {
7481 /*- This should not happen either
7482 * since we always lower to_move to the size
7483 * of sp->length if its larger.
7486 panic("Huh, how can to_move be larger?");
7488 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7492 atomic_subtract_int(&sp->length, to_move);
7494 if (stcb->asoc.idata_supported == 0) {
7495 leading = sizeof(struct sctp_data_chunk);
7497 leading = sizeof(struct sctp_idata_chunk);
7499 if (M_LEADINGSPACE(chk->data) < leading) {
7500 /* Not enough room for a chunk header, get some */
7503 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7506 * we're in trouble here. _PREPEND below will free
7507 * all the data if there is no leading space, so we
7508 * must put the data back and restore.
7510 if (send_lock_up == 0) {
7511 SCTP_TCB_SEND_LOCK(stcb);
7514 if (sp->data == NULL) {
7515 /* unsteal the data */
7516 sp->data = chk->data;
7517 sp->tail_mbuf = chk->last_mbuf;
7521 /* reassemble the data */
7523 sp->data = chk->data;
7524 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7526 sp->some_taken = some_taken;
7527 atomic_add_int(&sp->length, to_move);
7530 sctp_free_a_chunk(stcb, chk, so_locked);
7534 SCTP_BUF_LEN(m) = 0;
7535 SCTP_BUF_NEXT(m) = chk->data;
7537 M_ALIGN(chk->data, 4);
7540 if (stcb->asoc.idata_supported == 0) {
7541 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7543 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_idata_chunk), M_NOWAIT);
7545 if (chk->data == NULL) {
7546 /* HELP, TSNH since we assured it would not above? */
7548 panic("prepend failes HELP?");
7550 SCTP_PRINTF("prepend fails HELP?\n");
7551 sctp_free_a_chunk(stcb, chk, so_locked);
7557 if (stcb->asoc.idata_supported == 0) {
7558 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7559 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_data_chunk));
7561 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_idata_chunk));
7562 chk->book_size = chk->send_size = (uint16_t) (to_move + sizeof(struct sctp_idata_chunk));
7564 chk->book_size_scale = 0;
7565 chk->sent = SCTP_DATAGRAM_UNSENT;
7568 chk->asoc = &stcb->asoc;
7569 chk->pad_inplace = 0;
7570 chk->no_fr_allowed = 0;
7571 chk->rec.data.stream_seq = strq->next_sequence_send;
7572 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7573 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7574 strq->next_sequence_send++;
7576 chk->rec.data.stream_number = sp->stream;
7577 chk->rec.data.payloadtype = sp->ppid;
7578 chk->rec.data.context = sp->context;
7579 chk->rec.data.doing_fast_retransmit = 0;
7581 chk->rec.data.timetodrop = sp->ts;
7582 chk->flags = sp->act_flags;
7585 chk->whoTo = sp->net;
7586 atomic_add_int(&chk->whoTo->ref_count, 1);
7590 if (sp->holds_key_ref) {
7591 chk->auth_keyid = sp->auth_keyid;
7592 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7593 chk->holds_key_ref = 1;
7595 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7596 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7597 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7598 (uint32_t) (uintptr_t) stcb, sp->length,
7599 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7600 chk->rec.data.TSN_seq);
7602 if (stcb->asoc.idata_supported == 0) {
7603 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7605 ndchkh = mtod(chk->data, struct sctp_idata_chunk *);
7608 * Put the rest of the things in place now. Size was done earlier in
7609 * previous loop prior to padding.
7612 #ifdef SCTP_ASOCLOG_OF_TSNS
7613 SCTP_TCB_LOCK_ASSERT(stcb);
7614 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7615 asoc->tsn_out_at = 0;
7616 asoc->tsn_out_wrapped = 1;
7618 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7619 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7620 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7621 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7622 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7623 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7624 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7625 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7628 if (stcb->asoc.idata_supported == 0) {
7629 dchkh->ch.chunk_type = SCTP_DATA;
7630 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7631 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7632 dchkh->dp.stream_id = htons((strq->stream_no & 0x0000ffff));
7633 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7634 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7635 dchkh->ch.chunk_length = htons(chk->send_size);
7637 ndchkh->ch.chunk_type = SCTP_IDATA;
7638 ndchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7639 ndchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7640 ndchkh->dp.stream_id = htons(strq->stream_no);
7641 /* WHAT DO WE DO HERE??? */
7642 ndchkh->dp.reserved = htons(0);
7643 ndchkh->dp.msg_id = htonl(sp->msg_id);
7645 ndchkh->dp.ppid_fsn.protocol_id = chk->rec.data.payloadtype;
7647 ndchkh->dp.ppid_fsn.fsn = htonl(sp->fsn);
7649 ndchkh->ch.chunk_length = htons(chk->send_size);
7651 /* Now advance the chk->send_size by the actual pad needed. */
7652 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7657 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7658 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7660 chk->last_mbuf = lm;
7661 chk->pad_inplace = 1;
7663 chk->send_size += pads;
7665 if (PR_SCTP_ENABLED(chk->flags)) {
7666 asoc->pr_sctp_cnt++;
7668 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7669 /* All done pull and kill the message */
7670 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7671 if (sp->put_last_out == 0) {
7672 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7673 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7674 sp->sender_all_done,
7676 sp->msg_is_complete,
7680 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7681 SCTP_TCB_SEND_LOCK(stcb);
7684 TAILQ_REMOVE(&strq->outqueue, sp, next);
7685 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7686 (strq->chunks_on_queues == 0) &&
7687 TAILQ_EMPTY(&strq->outqueue)) {
7688 stcb->asoc.trigger_reset = 1;
7690 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7692 sctp_free_remote_addr(sp->net);
7696 sctp_m_freem(sp->data);
7699 sctp_free_a_strmoq(stcb, sp, so_locked);
7701 /* we can't be locked to it */
7703 stcb->asoc.locked_on_sending = NULL;
7705 /* more to go, we are locked */
7706 if (stcb->asoc.idata_supported == 0)
7709 asoc->chunks_on_out_queue++;
7710 strq->chunks_on_queues++;
7711 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7712 asoc->send_queue_cnt++;
7715 SCTP_TCB_SEND_UNLOCK(stcb);
7722 sctp_fill_outqueue(struct sctp_tcb *stcb,
7723 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7724 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7729 struct sctp_association *asoc;
7730 struct sctp_stream_out *strq;
7731 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7734 SCTP_TCB_LOCK_ASSERT(stcb);
7736 switch (net->ro._l_addr.sa.sa_family) {
7739 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7744 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7749 goal_mtu = net->mtu;
7752 /* Need an allowance for the data chunk header too */
7753 if (stcb->asoc.idata_supported == 0) {
7754 goal_mtu -= sizeof(struct sctp_data_chunk);
7756 goal_mtu -= sizeof(struct sctp_idata_chunk);
7759 /* must make even word boundary */
7760 goal_mtu &= 0xfffffffc;
7761 if (asoc->locked_on_sending) {
7762 /* We are stuck on one stream until the message completes. */
7763 strq = asoc->locked_on_sending;
7766 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7769 while ((goal_mtu > 0) && strq) {
7772 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7773 &giveup, eeor_mode, &bail, so_locked);
7775 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7778 asoc->locked_on_sending = strq;
7779 if ((moved_how_much == 0) || (giveup) || bail)
7780 /* no more to move for now */
7783 asoc->locked_on_sending = NULL;
7784 if ((giveup) || bail) {
7787 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7792 total_moved += moved_how_much;
7793 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7794 goal_mtu &= 0xfffffffc;
7799 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7801 if (total_moved == 0) {
7802 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7803 (net == stcb->asoc.primary_destination)) {
7804 /* ran dry for primary network net */
7805 SCTP_STAT_INCR(sctps_primary_randry);
7806 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7807 /* ran dry with CMT on */
7808 SCTP_STAT_INCR(sctps_cmt_randry);
7814 sctp_fix_ecn_echo(struct sctp_association *asoc)
7816 struct sctp_tmit_chunk *chk;
7818 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7819 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7820 chk->sent = SCTP_DATAGRAM_UNSENT;
7826 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7828 struct sctp_association *asoc;
7829 struct sctp_tmit_chunk *chk;
7830 struct sctp_stream_queue_pending *sp;
7837 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7838 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7839 if (sp->net == net) {
7840 sctp_free_remote_addr(sp->net);
7845 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7846 if (chk->whoTo == net) {
7847 sctp_free_remote_addr(chk->whoTo);
7854 sctp_med_chunk_output(struct sctp_inpcb *inp,
7855 struct sctp_tcb *stcb,
7856 struct sctp_association *asoc,
7859 int control_only, int from_where,
7860 struct timeval *now, int *now_filled, int frag_point, int so_locked
7861 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7867 * Ok this is the generic chunk service queue. we must do the
7869 * - Service the stream queue that is next, moving any
7870 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7871 * LAST to the out queue in one pass) and assigning TSN's. This
7872 * only applys though if the peer does not support NDATA. For NDATA
7873 * chunks its ok to not send the entire message ;-)
7874 * - Check to see if the cwnd/rwnd allows any output, if so we go ahead and
7875 * fomulate and send the low level chunks. Making sure to combine
7876 * any control in the control chunk queue also.
7878 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7879 struct mbuf *outchain, *endoutchain;
7880 struct sctp_tmit_chunk *chk, *nchk;
7882 /* temp arrays for unlinking */
7883 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7884 int no_fragmentflg, error;
7885 unsigned int max_rwnd_per_dest, max_send_per_dest;
7886 int one_chunk, hbflag, skip_data_for_this_net;
7887 int asconf, cookie, no_out_cnt;
7888 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7889 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7891 uint32_t auth_offset = 0;
7892 struct sctp_auth_chunk *auth = NULL;
7893 uint16_t auth_keyid;
7894 int override_ok = 1;
7895 int skip_fill_up = 0;
7896 int data_auth_reqd = 0;
7899 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7906 auth_keyid = stcb->asoc.authinfo.active_keyid;
7907 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7908 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7909 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7914 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7916 * First lets prime the pump. For each destination, if there is room
7917 * in the flight size, attempt to pull an MTU's worth out of the
7918 * stream queues into the general send_queue
7920 #ifdef SCTP_AUDITING_ENABLED
7921 sctp_audit_log(0xC2, 2);
7923 SCTP_TCB_LOCK_ASSERT(stcb);
7930 /* Nothing to possible to send? */
7931 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7932 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7933 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7934 TAILQ_EMPTY(&asoc->send_queue) &&
7935 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7940 if (asoc->peers_rwnd == 0) {
7941 /* No room in peers rwnd */
7943 if (asoc->total_flight > 0) {
7944 /* we are allowed one chunk in flight */
7948 if (stcb->asoc.ecn_echo_cnt_onq) {
7949 /* Record where a sack goes, if any */
7950 if (no_data_chunks &&
7951 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7952 /* Nothing but ECNe to send - we don't do that */
7953 goto nothing_to_send;
7955 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7956 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7957 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7958 sack_goes_to = chk->whoTo;
7963 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7964 if (stcb->sctp_socket)
7965 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7967 max_send_per_dest = 0;
7968 if (no_data_chunks == 0) {
7969 /* How many non-directed chunks are there? */
7970 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7971 if (chk->whoTo == NULL) {
7973 * We already have non-directed chunks on
7974 * the queue, no need to do a fill-up.
7982 if ((no_data_chunks == 0) &&
7983 (skip_fill_up == 0) &&
7984 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7985 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7987 * This for loop we are in takes in each net, if
7988 * its's got space in cwnd and has data sent to it
7989 * (when CMT is off) then it calls
7990 * sctp_fill_outqueue for the net. This gets data on
7991 * the send queue for that network.
7993 * In sctp_fill_outqueue TSN's are assigned and data is
7994 * copied out of the stream buffers. Note mostly
7995 * copy by reference (we hope).
7997 net->window_probe = 0;
7998 if ((net != stcb->asoc.alternate) &&
7999 ((net->dest_state & SCTP_ADDR_PF) ||
8000 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
8001 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
8002 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8003 sctp_log_cwnd(stcb, net, 1,
8004 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8008 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
8009 (net->flight_size == 0)) {
8010 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
8012 if (net->flight_size >= net->cwnd) {
8013 /* skip this network, no room - can't fill */
8014 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8015 sctp_log_cwnd(stcb, net, 3,
8016 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8020 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8021 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
8023 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
8025 /* memory alloc failure */
8031 /* now service each destination and send out what we can for it */
8032 /* Nothing to send? */
8033 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8034 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8035 TAILQ_EMPTY(&asoc->send_queue)) {
8039 if (asoc->sctp_cmt_on_off > 0) {
8040 /* get the last start point */
8041 start_at = asoc->last_net_cmt_send_started;
8042 if (start_at == NULL) {
8043 /* null so to beginning */
8044 start_at = TAILQ_FIRST(&asoc->nets);
8046 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
8047 if (start_at == NULL) {
8048 start_at = TAILQ_FIRST(&asoc->nets);
8051 asoc->last_net_cmt_send_started = start_at;
8053 start_at = TAILQ_FIRST(&asoc->nets);
8055 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
8056 if (chk->whoTo == NULL) {
8057 if (asoc->alternate) {
8058 chk->whoTo = asoc->alternate;
8060 chk->whoTo = asoc->primary_destination;
8062 atomic_add_int(&chk->whoTo->ref_count, 1);
8065 old_start_at = NULL;
8066 again_one_more_time:
8067 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
8068 /* how much can we send? */
8069 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
8070 if (old_start_at && (old_start_at == net)) {
8071 /* through list ocmpletely. */
8075 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8076 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8077 (net->flight_size >= net->cwnd)) {
8079 * Nothing on control or asconf and flight is full,
8080 * we can skip even in the CMT case.
8085 endoutchain = outchain = NULL;
8088 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8089 skip_data_for_this_net = 1;
8091 skip_data_for_this_net = 0;
8093 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8096 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8101 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8111 if (mtu > asoc->peers_rwnd) {
8112 if (asoc->total_flight > 0) {
8113 /* We have a packet in flight somewhere */
8114 r_mtu = asoc->peers_rwnd;
8116 /* We are always allowed to send one MTU out */
8124 /************************/
8125 /* ASCONF transmission */
8126 /************************/
8127 /* Now first lets go through the asconf queue */
8128 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8129 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8132 if (chk->whoTo == NULL) {
8133 if (asoc->alternate == NULL) {
8134 if (asoc->primary_destination != net) {
8138 if (asoc->alternate != net) {
8143 if (chk->whoTo != net) {
8147 if (chk->data == NULL) {
8150 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8151 chk->sent != SCTP_DATAGRAM_RESEND) {
8155 * if no AUTH is yet included and this chunk
8156 * requires it, make sure to account for it. We
8157 * don't apply the size until the AUTH chunk is
8158 * actually added below in case there is no room for
8159 * this chunk. NOTE: we overload the use of "omtu"
8162 if ((auth == NULL) &&
8163 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8164 stcb->asoc.peer_auth_chunks)) {
8165 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8168 /* Here we do NOT factor the r_mtu */
8169 if ((chk->send_size < (int)(mtu - omtu)) ||
8170 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8172 * We probably should glom the mbuf chain
8173 * from the chk->data for control but the
8174 * problem is it becomes yet one more level
8175 * of tracking to do if for some reason
8176 * output fails. Then I have got to
8177 * reconstruct the merged control chain.. el
8178 * yucko.. for now we take the easy way and
8182 * Add an AUTH chunk, if chunk requires it
8183 * save the offset into the chain for AUTH
8185 if ((auth == NULL) &&
8186 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8187 stcb->asoc.peer_auth_chunks))) {
8188 outchain = sctp_add_auth_chunk(outchain,
8193 chk->rec.chunk_id.id);
8194 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8196 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8197 (int)chk->rec.chunk_id.can_take_data,
8198 chk->send_size, chk->copy_by_ref);
8199 if (outchain == NULL) {
8201 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8204 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8205 /* update our MTU size */
8206 if (mtu > (chk->send_size + omtu))
8207 mtu -= (chk->send_size + omtu);
8210 to_out += (chk->send_size + omtu);
8211 /* Do clear IP_DF ? */
8212 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8215 if (chk->rec.chunk_id.can_take_data)
8218 * set hb flag since we can use these for
8224 * should sysctl this: don't bundle data
8225 * with ASCONF since it requires AUTH
8228 chk->sent = SCTP_DATAGRAM_SENT;
8229 if (chk->whoTo == NULL) {
8231 atomic_add_int(&net->ref_count, 1);
8236 * Ok we are out of room but we can
8237 * output without effecting the
8238 * flight size since this little guy
8239 * is a control only packet.
8241 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8243 * do NOT clear the asconf flag as
8244 * it is used to do appropriate
8245 * source address selection.
8247 if (*now_filled == 0) {
8248 (void)SCTP_GETTIME_TIMEVAL(now);
8251 net->last_sent_time = *now;
8253 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8254 (struct sockaddr *)&net->ro._l_addr,
8255 outchain, auth_offset, auth,
8256 stcb->asoc.authinfo.active_keyid,
8257 no_fragmentflg, 0, asconf,
8258 inp->sctp_lport, stcb->rport,
8259 htonl(stcb->asoc.peer_vtag),
8264 * error, we could not
8267 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8268 if (from_where == 0) {
8269 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8271 if (error == ENOBUFS) {
8272 asoc->ifp_had_enobuf = 1;
8273 SCTP_STAT_INCR(sctps_lowlevelerr);
8275 /* error, could not output */
8276 if (error == EHOSTUNREACH) {
8282 sctp_move_chunks_from_net(stcb, net);
8287 asoc->ifp_had_enobuf = 0;
8290 * increase the number we sent, if a
8291 * cookie is sent we don't tell them
8294 outchain = endoutchain = NULL;
8298 *num_out += ctl_cnt;
8299 /* recalc a clean slate and setup */
8300 switch (net->ro._l_addr.sa.sa_family) {
8303 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8308 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8325 /************************/
8326 /* Control transmission */
8327 /************************/
8328 /* Now first lets go through the control queue */
8329 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8330 if ((sack_goes_to) &&
8331 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8332 (chk->whoTo != sack_goes_to)) {
8334 * if we have a sack in queue, and we are
8335 * looking at an ecn echo that is NOT queued
8336 * to where the sack is going..
8338 if (chk->whoTo == net) {
8340 * Don't transmit it to where its
8341 * going (current net)
8344 } else if (sack_goes_to == net) {
8346 * But do transmit it to this
8349 goto skip_net_check;
8352 if (chk->whoTo == NULL) {
8353 if (asoc->alternate == NULL) {
8354 if (asoc->primary_destination != net) {
8358 if (asoc->alternate != net) {
8363 if (chk->whoTo != net) {
8368 if (chk->data == NULL) {
8371 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8373 * It must be unsent. Cookies and ASCONF's
8374 * hang around but there timers will force
8375 * when marked for resend.
8380 * if no AUTH is yet included and this chunk
8381 * requires it, make sure to account for it. We
8382 * don't apply the size until the AUTH chunk is
8383 * actually added below in case there is no room for
8384 * this chunk. NOTE: we overload the use of "omtu"
8387 if ((auth == NULL) &&
8388 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8389 stcb->asoc.peer_auth_chunks)) {
8390 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8393 /* Here we do NOT factor the r_mtu */
8394 if ((chk->send_size <= (int)(mtu - omtu)) ||
8395 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8397 * We probably should glom the mbuf chain
8398 * from the chk->data for control but the
8399 * problem is it becomes yet one more level
8400 * of tracking to do if for some reason
8401 * output fails. Then I have got to
8402 * reconstruct the merged control chain.. el
8403 * yucko.. for now we take the easy way and
8407 * Add an AUTH chunk, if chunk requires it
8408 * save the offset into the chain for AUTH
8410 if ((auth == NULL) &&
8411 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8412 stcb->asoc.peer_auth_chunks))) {
8413 outchain = sctp_add_auth_chunk(outchain,
8418 chk->rec.chunk_id.id);
8419 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8421 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8422 (int)chk->rec.chunk_id.can_take_data,
8423 chk->send_size, chk->copy_by_ref);
8424 if (outchain == NULL) {
8426 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8429 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8430 /* update our MTU size */
8431 if (mtu > (chk->send_size + omtu))
8432 mtu -= (chk->send_size + omtu);
8435 to_out += (chk->send_size + omtu);
8436 /* Do clear IP_DF ? */
8437 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8440 if (chk->rec.chunk_id.can_take_data)
8442 /* Mark things to be removed, if needed */
8443 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8444 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8445 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8446 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8447 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8448 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8449 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8450 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8451 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8452 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8453 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8454 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8457 /* remove these chunks at the end */
8458 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8459 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8460 /* turn off the timer */
8461 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8462 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8464 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8470 * Other chunks, since they have
8471 * timers running (i.e. COOKIE) we
8472 * just "trust" that it gets sent or
8476 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8479 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8481 * Increment ecne send count
8482 * here this means we may be
8483 * over-zealous in our
8484 * counting if the send
8485 * fails, but its the best
8486 * place to do it (we used
8487 * to do it in the queue of
8488 * the chunk, but that did
8489 * not tell how many times
8492 SCTP_STAT_INCR(sctps_sendecne);
8494 chk->sent = SCTP_DATAGRAM_SENT;
8495 if (chk->whoTo == NULL) {
8497 atomic_add_int(&net->ref_count, 1);
8503 * Ok we are out of room but we can
8504 * output without effecting the
8505 * flight size since this little guy
8506 * is a control only packet.
8509 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8511 * do NOT clear the asconf
8512 * flag as it is used to do
8513 * appropriate source
8514 * address selection.
8518 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8521 /* Only HB or ASCONF advances time */
8523 if (*now_filled == 0) {
8524 (void)SCTP_GETTIME_TIMEVAL(now);
8527 net->last_sent_time = *now;
8530 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8531 (struct sockaddr *)&net->ro._l_addr,
8534 stcb->asoc.authinfo.active_keyid,
8535 no_fragmentflg, 0, asconf,
8536 inp->sctp_lport, stcb->rport,
8537 htonl(stcb->asoc.peer_vtag),
8542 * error, we could not
8545 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8546 if (from_where == 0) {
8547 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8549 if (error == ENOBUFS) {
8550 asoc->ifp_had_enobuf = 1;
8551 SCTP_STAT_INCR(sctps_lowlevelerr);
8553 if (error == EHOSTUNREACH) {
8559 sctp_move_chunks_from_net(stcb, net);
8564 asoc->ifp_had_enobuf = 0;
8567 * increase the number we sent, if a
8568 * cookie is sent we don't tell them
8571 outchain = endoutchain = NULL;
8575 *num_out += ctl_cnt;
8576 /* recalc a clean slate and setup */
8577 switch (net->ro._l_addr.sa.sa_family) {
8580 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8585 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8602 /* JRI: if dest is in PF state, do not send data to it */
8603 if ((asoc->sctp_cmt_on_off > 0) &&
8604 (net != stcb->asoc.alternate) &&
8605 (net->dest_state & SCTP_ADDR_PF)) {
8608 if (net->flight_size >= net->cwnd) {
8611 if ((asoc->sctp_cmt_on_off > 0) &&
8612 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8613 (net->flight_size > max_rwnd_per_dest)) {
8617 * We need a specific accounting for the usage of the send
8618 * buffer. We also need to check the number of messages per
8619 * net. For now, this is better than nothing and it disabled
8622 if ((asoc->sctp_cmt_on_off > 0) &&
8623 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8624 (max_send_per_dest > 0) &&
8625 (net->flight_size > max_send_per_dest)) {
8628 /*********************/
8629 /* Data transmission */
8630 /*********************/
8632 * if AUTH for DATA is required and no AUTH has been added
8633 * yet, account for this in the mtu now... if no data can be
8634 * bundled, this adjustment won't matter anyways since the
8635 * packet will be going out...
8637 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8638 stcb->asoc.peer_auth_chunks);
8639 if (data_auth_reqd && (auth == NULL)) {
8640 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8642 /* now lets add any data within the MTU constraints */
8643 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8646 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8647 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8654 if (net->mtu > SCTP_MIN_OVERHEAD)
8655 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8665 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8666 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8667 (skip_data_for_this_net == 0)) ||
8669 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8670 if (no_data_chunks) {
8671 /* let only control go out */
8675 if (net->flight_size >= net->cwnd) {
8676 /* skip this net, no room for data */
8680 if ((chk->whoTo != NULL) &&
8681 (chk->whoTo != net)) {
8682 /* Don't send the chunk on this net */
8685 if (asoc->sctp_cmt_on_off == 0) {
8686 if ((asoc->alternate) &&
8687 (asoc->alternate != net) &&
8688 (chk->whoTo == NULL)) {
8690 } else if ((net != asoc->primary_destination) &&
8691 (asoc->alternate == NULL) &&
8692 (chk->whoTo == NULL)) {
8696 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8698 * strange, we have a chunk that is
8699 * to big for its destination and
8700 * yet no fragment ok flag.
8701 * Something went wrong when the
8702 * PMTU changed...we did not mark
8703 * this chunk for some reason?? I
8704 * will fix it here by letting IP
8705 * fragment it for now and printing
8706 * a warning. This really should not
8709 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8710 chk->send_size, mtu);
8711 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8713 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8714 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8715 struct sctp_data_chunk *dchkh;
8717 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8718 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8720 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8721 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8722 /* ok we will add this one */
8725 * Add an AUTH chunk, if chunk
8726 * requires it, save the offset into
8727 * the chain for AUTH
8729 if (data_auth_reqd) {
8731 outchain = sctp_add_auth_chunk(outchain,
8737 auth_keyid = chk->auth_keyid;
8739 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8740 } else if (override_ok) {
8745 auth_keyid = chk->auth_keyid;
8747 } else if (auth_keyid != chk->auth_keyid) {
8755 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8756 chk->send_size, chk->copy_by_ref);
8757 if (outchain == NULL) {
8758 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8759 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8760 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8763 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8766 /* upate our MTU size */
8767 /* Do clear IP_DF ? */
8768 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8771 /* unsigned subtraction of mtu */
8772 if (mtu > chk->send_size)
8773 mtu -= chk->send_size;
8776 /* unsigned subtraction of r_mtu */
8777 if (r_mtu > chk->send_size)
8778 r_mtu -= chk->send_size;
8782 to_out += chk->send_size;
8783 if ((to_out > mx_mtu) && no_fragmentflg) {
8785 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8787 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8791 chk->window_probe = 0;
8792 data_list[bundle_at++] = chk;
8793 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8796 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8797 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8798 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8800 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8802 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8803 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8813 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8815 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8816 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8817 data_list[0]->window_probe = 1;
8818 net->window_probe = 1;
8824 * Must be sent in order of the
8825 * TSN's (on a network)
8829 } /* for (chunk gather loop for this net) */
8830 } /* if asoc.state OPEN */
8832 /* Is there something to send for this destination? */
8834 /* We may need to start a control timer or two */
8836 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8839 * do NOT clear the asconf flag as it is
8840 * used to do appropriate source address
8845 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8848 /* must start a send timer if data is being sent */
8849 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8851 * no timer running on this destination
8854 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8856 if (bundle_at || hbflag) {
8857 /* For data/asconf and hb set time */
8858 if (*now_filled == 0) {
8859 (void)SCTP_GETTIME_TIMEVAL(now);
8862 net->last_sent_time = *now;
8864 /* Now send it, if there is anything to send :> */
8865 if ((error = sctp_lowlevel_chunk_output(inp,
8868 (struct sockaddr *)&net->ro._l_addr,
8876 inp->sctp_lport, stcb->rport,
8877 htonl(stcb->asoc.peer_vtag),
8881 /* error, we could not output */
8882 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8883 if (from_where == 0) {
8884 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8886 if (error == ENOBUFS) {
8887 SCTP_STAT_INCR(sctps_lowlevelerr);
8888 asoc->ifp_had_enobuf = 1;
8890 if (error == EHOSTUNREACH) {
8892 * Destination went unreachable
8895 sctp_move_chunks_from_net(stcb, net);
8899 * I add this line to be paranoid. As far as
8900 * I can tell the continue, takes us back to
8901 * the top of the for, but just to make sure
8902 * I will reset these again here.
8904 ctl_cnt = bundle_at = 0;
8905 continue; /* This takes us back to the
8906 * for() for the nets. */
8908 asoc->ifp_had_enobuf = 0;
8914 *num_out += (ctl_cnt + bundle_at);
8917 /* setup for a RTO measurement */
8918 tsns_sent = data_list[0]->rec.data.TSN_seq;
8919 /* fill time if not already filled */
8920 if (*now_filled == 0) {
8921 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8923 *now = asoc->time_last_sent;
8925 asoc->time_last_sent = *now;
8927 if (net->rto_needed) {
8928 data_list[0]->do_rtt = 1;
8929 net->rto_needed = 0;
8931 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8932 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8939 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8942 if (old_start_at == NULL) {
8943 old_start_at = start_at;
8944 start_at = TAILQ_FIRST(&asoc->nets);
8946 goto again_one_more_time;
8949 * At the end there should be no NON timed chunks hanging on this
8952 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8953 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8955 if ((*num_out == 0) && (*reason_code == 0)) {
8960 sctp_clean_up_ctl(stcb, asoc, so_locked);
8965 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8968 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8969 * the control chunk queue.
8971 struct sctp_chunkhdr *hdr;
8972 struct sctp_tmit_chunk *chk;
8973 struct mbuf *mat, *last_mbuf;
8974 uint32_t chunk_length;
8975 uint16_t padding_length;
8977 SCTP_TCB_LOCK_ASSERT(stcb);
8978 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8979 if (op_err == NULL) {
8984 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8985 chunk_length += SCTP_BUF_LEN(mat);
8986 if (SCTP_BUF_NEXT(mat) == NULL) {
8990 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8991 sctp_m_freem(op_err);
8994 padding_length = chunk_length % 4;
8995 if (padding_length != 0) {
8996 padding_length = 4 - padding_length;
8998 if (padding_length != 0) {
8999 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
9000 sctp_m_freem(op_err);
9004 sctp_alloc_a_chunk(stcb, chk);
9007 sctp_m_freem(op_err);
9010 chk->copy_by_ref = 0;
9011 chk->send_size = (uint16_t) chunk_length;
9012 chk->sent = SCTP_DATAGRAM_UNSENT;
9014 chk->asoc = &stcb->asoc;
9017 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
9018 chk->rec.chunk_id.can_take_data = 0;
9019 hdr = mtod(op_err, struct sctp_chunkhdr *);
9020 hdr->chunk_type = SCTP_OPERATION_ERROR;
9021 hdr->chunk_flags = 0;
9022 hdr->chunk_length = htons(chk->send_size);
9023 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9024 chk->asoc->ctrl_queue_cnt++;
9028 sctp_send_cookie_echo(struct mbuf *m,
9030 struct sctp_tcb *stcb,
9031 struct sctp_nets *net)
9034 * pull out the cookie and put it at the front of the control chunk
9038 struct mbuf *cookie;
9039 struct sctp_paramhdr parm, *phdr;
9040 struct sctp_chunkhdr *hdr;
9041 struct sctp_tmit_chunk *chk;
9042 uint16_t ptype, plen;
9044 SCTP_TCB_LOCK_ASSERT(stcb);
9045 /* First find the cookie in the param area */
9047 at = offset + sizeof(struct sctp_init_chunk);
9049 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
9053 ptype = ntohs(phdr->param_type);
9054 plen = ntohs(phdr->param_length);
9055 if (ptype == SCTP_STATE_COOKIE) {
9058 /* found the cookie */
9059 if ((pad = (plen % 4))) {
9062 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
9063 if (cookie == NULL) {
9067 #ifdef SCTP_MBUF_LOGGING
9068 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9069 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9074 at += SCTP_SIZE32(plen);
9076 /* ok, we got the cookie lets change it into a cookie echo chunk */
9077 /* first the change from param to cookie */
9078 hdr = mtod(cookie, struct sctp_chunkhdr *);
9079 hdr->chunk_type = SCTP_COOKIE_ECHO;
9080 hdr->chunk_flags = 0;
9081 /* get the chunk stuff now and place it in the FRONT of the queue */
9082 sctp_alloc_a_chunk(stcb, chk);
9085 sctp_m_freem(cookie);
9088 chk->copy_by_ref = 0;
9089 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9090 chk->rec.chunk_id.can_take_data = 0;
9091 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9092 chk->send_size = plen;
9093 chk->sent = SCTP_DATAGRAM_UNSENT;
9095 chk->asoc = &stcb->asoc;
9098 atomic_add_int(&chk->whoTo->ref_count, 1);
9099 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9100 chk->asoc->ctrl_queue_cnt++;
9105 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9109 struct sctp_nets *net)
9112 * take a HB request and make it into a HB ack and send it.
9114 struct mbuf *outchain;
9115 struct sctp_chunkhdr *chdr;
9116 struct sctp_tmit_chunk *chk;
9120 /* must have a net pointer */
9123 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9124 if (outchain == NULL) {
9125 /* gak out of memory */
9128 #ifdef SCTP_MBUF_LOGGING
9129 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9130 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9133 chdr = mtod(outchain, struct sctp_chunkhdr *);
9134 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9135 chdr->chunk_flags = 0;
9136 if (chk_length % 4) {
9138 uint32_t cpthis = 0;
9141 padlen = 4 - (chk_length % 4);
9142 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9144 sctp_alloc_a_chunk(stcb, chk);
9147 sctp_m_freem(outchain);
9150 chk->copy_by_ref = 0;
9151 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9152 chk->rec.chunk_id.can_take_data = 1;
9154 chk->send_size = chk_length;
9155 chk->sent = SCTP_DATAGRAM_UNSENT;
9157 chk->asoc = &stcb->asoc;
9158 chk->data = outchain;
9160 atomic_add_int(&chk->whoTo->ref_count, 1);
9161 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9162 chk->asoc->ctrl_queue_cnt++;
9166 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9168 /* formulate and queue a cookie-ack back to sender */
9169 struct mbuf *cookie_ack;
9170 struct sctp_chunkhdr *hdr;
9171 struct sctp_tmit_chunk *chk;
9173 SCTP_TCB_LOCK_ASSERT(stcb);
9175 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9176 if (cookie_ack == NULL) {
9180 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9181 sctp_alloc_a_chunk(stcb, chk);
9184 sctp_m_freem(cookie_ack);
9187 chk->copy_by_ref = 0;
9188 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9189 chk->rec.chunk_id.can_take_data = 1;
9191 chk->send_size = sizeof(struct sctp_chunkhdr);
9192 chk->sent = SCTP_DATAGRAM_UNSENT;
9194 chk->asoc = &stcb->asoc;
9195 chk->data = cookie_ack;
9196 if (chk->asoc->last_control_chunk_from != NULL) {
9197 chk->whoTo = chk->asoc->last_control_chunk_from;
9198 atomic_add_int(&chk->whoTo->ref_count, 1);
9202 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9203 hdr->chunk_type = SCTP_COOKIE_ACK;
9204 hdr->chunk_flags = 0;
9205 hdr->chunk_length = htons(chk->send_size);
9206 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9207 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9208 chk->asoc->ctrl_queue_cnt++;
9214 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9216 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9217 struct mbuf *m_shutdown_ack;
9218 struct sctp_shutdown_ack_chunk *ack_cp;
9219 struct sctp_tmit_chunk *chk;
9221 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9222 if (m_shutdown_ack == NULL) {
9226 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9227 sctp_alloc_a_chunk(stcb, chk);
9230 sctp_m_freem(m_shutdown_ack);
9233 chk->copy_by_ref = 0;
9234 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9235 chk->rec.chunk_id.can_take_data = 1;
9237 chk->send_size = sizeof(struct sctp_chunkhdr);
9238 chk->sent = SCTP_DATAGRAM_UNSENT;
9241 chk->asoc = &stcb->asoc;
9242 chk->data = m_shutdown_ack;
9245 atomic_add_int(&chk->whoTo->ref_count, 1);
9247 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9248 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9249 ack_cp->ch.chunk_flags = 0;
9250 ack_cp->ch.chunk_length = htons(chk->send_size);
9251 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9252 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9253 chk->asoc->ctrl_queue_cnt++;
9258 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9260 /* formulate and queue a SHUTDOWN to the sender */
9261 struct mbuf *m_shutdown;
9262 struct sctp_shutdown_chunk *shutdown_cp;
9263 struct sctp_tmit_chunk *chk;
9265 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9266 if (m_shutdown == NULL) {
9270 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9271 sctp_alloc_a_chunk(stcb, chk);
9274 sctp_m_freem(m_shutdown);
9277 chk->copy_by_ref = 0;
9278 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9279 chk->rec.chunk_id.can_take_data = 1;
9281 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9282 chk->sent = SCTP_DATAGRAM_UNSENT;
9285 chk->asoc = &stcb->asoc;
9286 chk->data = m_shutdown;
9289 atomic_add_int(&chk->whoTo->ref_count, 1);
9291 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9292 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9293 shutdown_cp->ch.chunk_flags = 0;
9294 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9295 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9296 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9297 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9298 chk->asoc->ctrl_queue_cnt++;
9303 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9306 * formulate and queue an ASCONF to the peer. ASCONF parameters
9307 * should be queued on the assoc queue.
9309 struct sctp_tmit_chunk *chk;
9310 struct mbuf *m_asconf;
9313 SCTP_TCB_LOCK_ASSERT(stcb);
9315 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9316 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9317 /* can't send a new one if there is one in flight already */
9320 /* compose an ASCONF chunk, maximum length is PMTU */
9321 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9322 if (m_asconf == NULL) {
9325 sctp_alloc_a_chunk(stcb, chk);
9328 sctp_m_freem(m_asconf);
9331 chk->copy_by_ref = 0;
9332 chk->rec.chunk_id.id = SCTP_ASCONF;
9333 chk->rec.chunk_id.can_take_data = 0;
9334 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9335 chk->data = m_asconf;
9336 chk->send_size = len;
9337 chk->sent = SCTP_DATAGRAM_UNSENT;
9339 chk->asoc = &stcb->asoc;
9342 atomic_add_int(&chk->whoTo->ref_count, 1);
9344 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9345 chk->asoc->ctrl_queue_cnt++;
9350 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9353 * formulate and queue a asconf-ack back to sender. the asconf-ack
9354 * must be stored in the tcb.
9356 struct sctp_tmit_chunk *chk;
9357 struct sctp_asconf_ack *ack, *latest_ack;
9359 struct sctp_nets *net = NULL;
9361 SCTP_TCB_LOCK_ASSERT(stcb);
9362 /* Get the latest ASCONF-ACK */
9363 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9364 if (latest_ack == NULL) {
9367 if (latest_ack->last_sent_to != NULL &&
9368 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9369 /* we're doing a retransmission */
9370 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9373 if (stcb->asoc.last_control_chunk_from == NULL) {
9374 if (stcb->asoc.alternate) {
9375 net = stcb->asoc.alternate;
9377 net = stcb->asoc.primary_destination;
9380 net = stcb->asoc.last_control_chunk_from;
9385 if (stcb->asoc.last_control_chunk_from == NULL) {
9386 if (stcb->asoc.alternate) {
9387 net = stcb->asoc.alternate;
9389 net = stcb->asoc.primary_destination;
9392 net = stcb->asoc.last_control_chunk_from;
9395 latest_ack->last_sent_to = net;
9397 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9398 if (ack->data == NULL) {
9401 /* copy the asconf_ack */
9402 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9403 if (m_ack == NULL) {
9404 /* couldn't copy it */
9407 #ifdef SCTP_MBUF_LOGGING
9408 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9409 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9413 sctp_alloc_a_chunk(stcb, chk);
9417 sctp_m_freem(m_ack);
9420 chk->copy_by_ref = 0;
9421 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9422 chk->rec.chunk_id.can_take_data = 1;
9423 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9426 atomic_add_int(&chk->whoTo->ref_count, 1);
9429 chk->send_size = ack->len;
9430 chk->sent = SCTP_DATAGRAM_UNSENT;
9432 chk->asoc = &stcb->asoc;
9434 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9435 chk->asoc->ctrl_queue_cnt++;
9442 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9443 struct sctp_tcb *stcb,
9444 struct sctp_association *asoc,
9445 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9446 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9452 * send out one MTU of retransmission. If fast_retransmit is
9453 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9454 * rwnd. For a Cookie or Asconf in the control chunk queue we
9455 * retransmit them by themselves.
9457 * For data chunks we will pick out the lowest TSN's in the sent_queue
9458 * marked for resend and bundle them all together (up to a MTU of
9459 * destination). The address to send to should have been
9460 * selected/changed where the retransmission was marked (i.e. in FR
9461 * or t3-timeout routines).
9463 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9464 struct sctp_tmit_chunk *chk, *fwd;
9465 struct mbuf *m, *endofchain;
9466 struct sctp_nets *net = NULL;
9467 uint32_t tsns_sent = 0;
9468 int no_fragmentflg, bundle_at, cnt_thru;
9470 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9471 struct sctp_auth_chunk *auth = NULL;
9472 uint32_t auth_offset = 0;
9473 uint16_t auth_keyid;
9474 int override_ok = 1;
9475 int data_auth_reqd = 0;
9478 SCTP_TCB_LOCK_ASSERT(stcb);
9479 tmr_started = ctl_cnt = bundle_at = error = 0;
9484 endofchain = m = NULL;
9485 auth_keyid = stcb->asoc.authinfo.active_keyid;
9486 #ifdef SCTP_AUDITING_ENABLED
9487 sctp_audit_log(0xC3, 1);
9489 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9490 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9491 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9492 asoc->sent_queue_retran_cnt);
9493 asoc->sent_queue_cnt = 0;
9494 asoc->sent_queue_cnt_removeable = 0;
9495 /* send back 0/0 so we enter normal transmission */
9499 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9500 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9501 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9502 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9503 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9506 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9507 if (chk != asoc->str_reset) {
9509 * not eligible for retran if its
9516 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9520 * Add an AUTH chunk, if chunk requires it save the
9521 * offset into the chain for AUTH
9523 if ((auth == NULL) &&
9524 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9525 stcb->asoc.peer_auth_chunks))) {
9526 m = sctp_add_auth_chunk(m, &endofchain,
9527 &auth, &auth_offset,
9529 chk->rec.chunk_id.id);
9530 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9532 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9538 /* do we have control chunks to retransmit? */
9540 /* Start a timer no matter if we succeed or fail */
9541 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9542 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9543 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9544 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9545 chk->snd_count++; /* update our count */
9546 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9547 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9548 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9549 no_fragmentflg, 0, 0,
9550 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9551 chk->whoTo->port, NULL,
9554 SCTP_STAT_INCR(sctps_lowlevelerr);
9561 * We don't want to mark the net->sent time here since this
9562 * we use this for HB and retrans cannot measure RTT
9564 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9566 chk->sent = SCTP_DATAGRAM_SENT;
9567 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9571 /* Clean up the fwd-tsn list */
9572 sctp_clean_up_ctl(stcb, asoc, so_locked);
9577 * Ok, it is just data retransmission we need to do or that and a
9578 * fwd-tsn with it all.
9580 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9581 return (SCTP_RETRAN_DONE);
9583 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9584 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9585 /* not yet open, resend the cookie and that is it */
9588 #ifdef SCTP_AUDITING_ENABLED
9589 sctp_auditing(20, inp, stcb, NULL);
9591 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9592 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9593 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9594 /* No, not sent to this net or not ready for rtx */
9597 if (chk->data == NULL) {
9598 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9599 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9602 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9603 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9604 struct mbuf *op_err;
9605 char msg[SCTP_DIAG_INFO_LEN];
9607 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9608 chk->rec.data.TSN_seq, chk->snd_count);
9609 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9611 atomic_add_int(&stcb->asoc.refcnt, 1);
9612 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9614 SCTP_TCB_LOCK(stcb);
9615 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9616 return (SCTP_RETRAN_EXIT);
9618 /* pick up the net */
9620 switch (net->ro._l_addr.sa.sa_family) {
9623 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9628 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9637 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9638 /* No room in peers rwnd */
9641 tsn = asoc->last_acked_seq + 1;
9642 if (tsn == chk->rec.data.TSN_seq) {
9644 * we make a special exception for this
9645 * case. The peer has no rwnd but is missing
9646 * the lowest chunk.. which is probably what
9647 * is holding up the rwnd.
9649 goto one_chunk_around;
9654 if (asoc->peers_rwnd < mtu) {
9656 if ((asoc->peers_rwnd == 0) &&
9657 (asoc->total_flight == 0)) {
9658 chk->window_probe = 1;
9659 chk->whoTo->window_probe = 1;
9662 #ifdef SCTP_AUDITING_ENABLED
9663 sctp_audit_log(0xC3, 2);
9667 net->fast_retran_ip = 0;
9668 if (chk->rec.data.doing_fast_retransmit == 0) {
9670 * if no FR in progress skip destination that have
9671 * flight_size > cwnd.
9673 if (net->flight_size >= net->cwnd) {
9678 * Mark the destination net to have FR recovery
9682 net->fast_retran_ip = 1;
9686 * if no AUTH is yet included and this chunk requires it,
9687 * make sure to account for it. We don't apply the size
9688 * until the AUTH chunk is actually added below in case
9689 * there is no room for this chunk.
9691 if (data_auth_reqd && (auth == NULL)) {
9692 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9696 if ((chk->send_size <= (mtu - dmtu)) ||
9697 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9698 /* ok we will add this one */
9699 if (data_auth_reqd) {
9701 m = sctp_add_auth_chunk(m,
9707 auth_keyid = chk->auth_keyid;
9709 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9710 } else if (override_ok) {
9711 auth_keyid = chk->auth_keyid;
9713 } else if (chk->auth_keyid != auth_keyid) {
9714 /* different keyid, so done bundling */
9718 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9720 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9723 /* Do clear IP_DF ? */
9724 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9727 /* upate our MTU size */
9728 if (mtu > (chk->send_size + dmtu))
9729 mtu -= (chk->send_size + dmtu);
9732 data_list[bundle_at++] = chk;
9733 if (one_chunk && (asoc->total_flight <= 0)) {
9734 SCTP_STAT_INCR(sctps_windowprobed);
9737 if (one_chunk == 0) {
9739 * now are there anymore forward from chk to pick
9742 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9743 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9744 /* Nope, not for retran */
9747 if (fwd->whoTo != net) {
9748 /* Nope, not the net in question */
9751 if (data_auth_reqd && (auth == NULL)) {
9752 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9755 if (fwd->send_size <= (mtu - dmtu)) {
9756 if (data_auth_reqd) {
9758 m = sctp_add_auth_chunk(m,
9764 auth_keyid = fwd->auth_keyid;
9766 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9767 } else if (override_ok) {
9768 auth_keyid = fwd->auth_keyid;
9770 } else if (fwd->auth_keyid != auth_keyid) {
9778 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9780 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9783 /* Do clear IP_DF ? */
9784 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9787 /* upate our MTU size */
9788 if (mtu > (fwd->send_size + dmtu))
9789 mtu -= (fwd->send_size + dmtu);
9792 data_list[bundle_at++] = fwd;
9793 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9797 /* can't fit so we are done */
9802 /* Is there something to send for this destination? */
9805 * No matter if we fail/or succeed we should start a
9806 * timer. A failure is like a lost IP packet :-)
9808 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9810 * no timer running on this destination
9813 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9816 /* Now lets send it, if there is anything to send :> */
9817 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9818 (struct sockaddr *)&net->ro._l_addr, m,
9819 auth_offset, auth, auth_keyid,
9820 no_fragmentflg, 0, 0,
9821 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9825 /* error, we could not output */
9826 SCTP_STAT_INCR(sctps_lowlevelerr);
9834 * We don't want to mark the net->sent time here
9835 * since this we use this for HB and retrans cannot
9838 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9840 /* For auto-close */
9842 if (*now_filled == 0) {
9843 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9844 *now = asoc->time_last_sent;
9847 asoc->time_last_sent = *now;
9849 *cnt_out += bundle_at;
9850 #ifdef SCTP_AUDITING_ENABLED
9851 sctp_audit_log(0xC4, bundle_at);
9854 tsns_sent = data_list[0]->rec.data.TSN_seq;
9856 for (i = 0; i < bundle_at; i++) {
9857 SCTP_STAT_INCR(sctps_sendretransdata);
9858 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9860 * When we have a revoked data, and we
9861 * retransmit it, then we clear the revoked
9862 * flag since this flag dictates if we
9863 * subtracted from the fs
9865 if (data_list[i]->rec.data.chunk_was_revoked) {
9866 /* Deflate the cwnd */
9867 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9868 data_list[i]->rec.data.chunk_was_revoked = 0;
9870 data_list[i]->snd_count++;
9871 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9872 /* record the time */
9873 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9874 if (data_list[i]->book_size_scale) {
9876 * need to double the book size on
9879 data_list[i]->book_size_scale = 0;
9881 * Since we double the booksize, we
9882 * must also double the output queue
9883 * size, since this get shrunk when
9884 * we free by this amount.
9886 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9887 data_list[i]->book_size *= 2;
9891 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9892 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9893 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9895 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9896 (uint32_t) (data_list[i]->send_size +
9897 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9899 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9900 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9901 data_list[i]->whoTo->flight_size,
9902 data_list[i]->book_size,
9903 (uint32_t) (uintptr_t) data_list[i]->whoTo,
9904 data_list[i]->rec.data.TSN_seq);
9906 sctp_flight_size_increase(data_list[i]);
9907 sctp_total_flight_increase(stcb, data_list[i]);
9908 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9909 /* SWS sender side engages */
9910 asoc->peers_rwnd = 0;
9913 (data_list[i]->rec.data.doing_fast_retransmit)) {
9914 SCTP_STAT_INCR(sctps_sendfastretrans);
9915 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9916 (tmr_started == 0)) {
9918 * ok we just fast-retrans'd
9919 * the lowest TSN, i.e the
9920 * first on the list. In
9921 * this case we want to give
9922 * some more time to get a
9923 * SACK back without a
9926 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9927 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9928 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9932 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9933 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9935 #ifdef SCTP_AUDITING_ENABLED
9936 sctp_auditing(21, inp, stcb, NULL);
9942 if (asoc->sent_queue_retran_cnt <= 0) {
9943 /* all done we have no more to retran */
9944 asoc->sent_queue_retran_cnt = 0;
9948 /* No more room in rwnd */
9951 /* stop the for loop here. we sent out a packet */
9958 sctp_timer_validation(struct sctp_inpcb *inp,
9959 struct sctp_tcb *stcb,
9960 struct sctp_association *asoc)
9962 struct sctp_nets *net;
9964 /* Validate that a timer is running somewhere */
9965 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9966 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9967 /* Here is a timer */
9971 SCTP_TCB_LOCK_ASSERT(stcb);
9972 /* Gak, we did not have a timer somewhere */
9973 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9974 if (asoc->alternate) {
9975 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9977 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9983 sctp_chunk_output(struct sctp_inpcb *inp,
9984 struct sctp_tcb *stcb,
9987 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9993 * Ok this is the generic chunk service queue. we must do the
9995 * - See if there are retransmits pending, if so we must
9997 * - Service the stream queue that is next, moving any
9998 * message (note I must get a complete message i.e.
9999 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
10001 * - Check to see if the cwnd/rwnd allows any output, if so we
10002 * go ahead and fomulate and send the low level chunks. Making sure
10003 * to combine any control in the control chunk queue also.
10005 struct sctp_association *asoc;
10006 struct sctp_nets *net;
10007 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
10008 unsigned int burst_cnt = 0;
10009 struct timeval now;
10010 int now_filled = 0;
10012 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
10015 unsigned int tot_frs = 0;
10017 asoc = &stcb->asoc;
10019 /* The Nagle algorithm is only applied when handling a send call. */
10020 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
10021 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
10029 SCTP_TCB_LOCK_ASSERT(stcb);
10031 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
10033 if ((un_sent <= 0) &&
10034 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
10035 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
10036 (asoc->sent_queue_retran_cnt == 0) &&
10037 (asoc->trigger_reset == 0)) {
10038 /* Nothing to do unless there is something to be sent left */
10042 * Do we have something to send, data or control AND a sack timer
10043 * running, if so piggy-back the sack.
10045 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
10046 sctp_send_sack(stcb, so_locked);
10047 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
10049 while (asoc->sent_queue_retran_cnt) {
10051 * Ok, it is retransmission time only, we send out only ONE
10052 * packet with a single call off to the retran code.
10054 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10056 * Special hook for handling cookiess discarded
10057 * by peer that carried data. Send cookie-ack only
10058 * and then the next call with get the retran's.
10060 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10062 &now, &now_filled, frag_point, so_locked);
10064 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10065 /* if its not from a HB then do it */
10067 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10073 * its from any other place, we don't allow retran
10074 * output (only control)
10079 /* Can't send anymore */
10081 * now lets push out control by calling med-level
10082 * output once. this assures that we WILL send HB's
10085 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10087 &now, &now_filled, frag_point, so_locked);
10088 #ifdef SCTP_AUDITING_ENABLED
10089 sctp_auditing(8, inp, stcb, NULL);
10091 sctp_timer_validation(inp, stcb, asoc);
10096 * The count was off.. retran is not happening so do
10097 * the normal retransmission.
10099 #ifdef SCTP_AUDITING_ENABLED
10100 sctp_auditing(9, inp, stcb, NULL);
10102 if (ret == SCTP_RETRAN_EXIT) {
10107 if (from_where == SCTP_OUTPUT_FROM_T3) {
10108 /* Only one transmission allowed out of a timeout */
10109 #ifdef SCTP_AUDITING_ENABLED
10110 sctp_auditing(10, inp, stcb, NULL);
10112 /* Push out any control */
10113 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10114 &now, &now_filled, frag_point, so_locked);
10117 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10118 /* Hit FR burst limit */
10121 if ((num_out == 0) && (ret == 0)) {
10122 /* No more retrans to send */
10126 #ifdef SCTP_AUDITING_ENABLED
10127 sctp_auditing(12, inp, stcb, NULL);
10129 /* Check for bad destinations, if they exist move chunks around. */
10130 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10131 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10133 * if possible move things off of this address we
10134 * still may send below due to the dormant state but
10135 * we try to find an alternate address to send to
10136 * and if we have one we move all queued data on the
10137 * out wheel to this alternate address.
10139 if (net->ref_count > 1)
10140 sctp_move_chunks_from_net(stcb, net);
10143 * if ((asoc->sat_network) || (net->addr_is_local))
10144 * { burst_limit = asoc->max_burst *
10145 * SCTP_SAT_NETWORK_BURST_INCR; }
10147 if (asoc->max_burst > 0) {
10148 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10149 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10151 * JRS - Use the congestion
10152 * control given in the
10153 * congestion control module
10155 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10156 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10157 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10159 SCTP_STAT_INCR(sctps_maxburstqueued);
10161 net->fast_retran_ip = 0;
10163 if (net->flight_size == 0) {
10165 * Should be decaying the
10177 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10178 &reason_code, 0, from_where,
10179 &now, &now_filled, frag_point, so_locked);
10181 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10182 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10183 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10185 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10186 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10187 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10191 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10193 tot_out += num_out;
10195 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10196 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10197 if (num_out == 0) {
10198 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10203 * When the Nagle algorithm is used, look at how
10204 * much is unsent, then if its smaller than an MTU
10205 * and we have data in flight we stop, except if we
10206 * are handling a fragmented user message.
10208 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10209 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10210 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10211 (stcb->asoc.total_flight > 0) &&
10212 ((stcb->asoc.locked_on_sending == NULL) ||
10213 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10217 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10218 TAILQ_EMPTY(&asoc->send_queue) &&
10219 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10220 /* Nothing left to send */
10223 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10224 /* Nothing left to send */
10227 } while (num_out &&
10228 ((asoc->max_burst == 0) ||
10229 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10230 (burst_cnt < asoc->max_burst)));
10232 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10233 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10234 SCTP_STAT_INCR(sctps_maxburstqueued);
10235 asoc->burst_limit_applied = 1;
10236 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10237 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10240 asoc->burst_limit_applied = 0;
10243 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10244 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10246 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10250 * Now we need to clean up the control chunk chain if a ECNE is on
10251 * it. It must be marked as UNSENT again so next call will continue
10252 * to send it until such time that we get a CWR, to remove it.
10254 if (stcb->asoc.ecn_echo_cnt_onq)
10255 sctp_fix_ecn_echo(asoc);
10257 if (stcb->asoc.trigger_reset) {
10258 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10268 struct sctp_inpcb *inp,
10270 struct sockaddr *addr,
10271 struct mbuf *control,
10276 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10279 if (inp->sctp_socket == NULL) {
10280 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10283 return (sctp_sosend(inp->sctp_socket,
10285 (struct uio *)NULL,
10293 send_forward_tsn(struct sctp_tcb *stcb,
10294 struct sctp_association *asoc)
10296 struct sctp_tmit_chunk *chk;
10297 struct sctp_forward_tsn_chunk *fwdtsn;
10298 uint32_t advance_peer_ack_point;
10301 if (asoc->idata_supported) {
10306 SCTP_TCB_LOCK_ASSERT(stcb);
10307 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10308 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10309 /* mark it to unsent */
10310 chk->sent = SCTP_DATAGRAM_UNSENT;
10311 chk->snd_count = 0;
10312 /* Do we correct its output location? */
10314 sctp_free_remote_addr(chk->whoTo);
10317 goto sctp_fill_in_rest;
10320 /* Ok if we reach here we must build one */
10321 sctp_alloc_a_chunk(stcb, chk);
10325 asoc->fwd_tsn_cnt++;
10326 chk->copy_by_ref = 0;
10328 * We don't do the old thing here since this is used not for on-wire
10329 * but to tell if we are sending a fwd-tsn by the stack during
10330 * output. And if its a IFORWARD or a FORWARD it is a fwd-tsn.
10332 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10333 chk->rec.chunk_id.can_take_data = 0;
10337 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10338 if (chk->data == NULL) {
10339 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10342 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10343 chk->sent = SCTP_DATAGRAM_UNSENT;
10344 chk->snd_count = 0;
10345 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10346 asoc->ctrl_queue_cnt++;
10349 * Here we go through and fill out the part that deals with
10350 * stream/seq of the ones we skip.
10352 SCTP_BUF_LEN(chk->data) = 0;
10354 struct sctp_tmit_chunk *at, *tp1, *last;
10355 struct sctp_strseq *strseq;
10356 struct sctp_strseq_mid *strseq_m;
10357 unsigned int cnt_of_space, i, ovh;
10358 unsigned int space_needed;
10359 unsigned int cnt_of_skipped = 0;
10361 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10362 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10363 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10364 /* no more to look at */
10367 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10368 /* We don't report these */
10374 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10375 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10377 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10378 (cnt_of_skipped * sizeof(struct sctp_strseq_mid)));
10380 cnt_of_space = (unsigned int)M_TRAILINGSPACE(chk->data);
10382 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10383 ovh = SCTP_MIN_OVERHEAD;
10385 ovh = SCTP_MIN_V4_OVERHEAD;
10387 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10388 /* trim to a mtu size */
10389 cnt_of_space = asoc->smallest_mtu - ovh;
10391 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10392 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10393 0xff, 0, cnt_of_skipped,
10394 asoc->advanced_peer_ack_point);
10397 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10398 if (cnt_of_space < space_needed) {
10400 * ok we must trim down the chunk by lowering the
10401 * advance peer ack point.
10403 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10404 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10405 0xff, 0xff, cnt_of_space,
10409 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10410 cnt_of_skipped /= sizeof(struct sctp_strseq);
10412 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10413 cnt_of_skipped /= sizeof(struct sctp_strseq_mid);
10416 * Go through and find the TSN that will be the one
10419 at = TAILQ_FIRST(&asoc->sent_queue);
10421 for (i = 0; i < cnt_of_skipped; i++) {
10422 tp1 = TAILQ_NEXT(at, sctp_next);
10429 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10430 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10431 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10432 asoc->advanced_peer_ack_point);
10436 * last now points to last one I can report, update
10440 advance_peer_ack_point = last->rec.data.TSN_seq;
10442 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10443 cnt_of_skipped * sizeof(struct sctp_strseq);
10445 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10446 cnt_of_skipped * sizeof(struct sctp_strseq_mid);
10449 chk->send_size = space_needed;
10450 /* Setup the chunk */
10451 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10452 fwdtsn->ch.chunk_length = htons(chk->send_size);
10453 fwdtsn->ch.chunk_flags = 0;
10455 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10457 fwdtsn->ch.chunk_type = SCTP_IFORWARD_CUM_TSN;
10459 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10460 SCTP_BUF_LEN(chk->data) = chk->send_size;
10463 * Move pointer to after the fwdtsn and transfer to the
10467 strseq = (struct sctp_strseq *)fwdtsn;
10469 strseq_m = (struct sctp_strseq_mid *)fwdtsn;
10472 * Now populate the strseq list. This is done blindly
10473 * without pulling out duplicate stream info. This is
10474 * inefficent but won't harm the process since the peer will
10475 * look at these in sequence and will thus release anything.
10476 * It could mean we exceed the PMTU and chop off some that
10477 * we could have included.. but this is unlikely (aka 1432/4
10478 * would mean 300+ stream seq's would have to be reported in
10479 * one FWD-TSN. With a bit of work we can later FIX this to
10480 * optimize and pull out duplcates.. but it does add more
10481 * overhead. So for now... not!
10483 at = TAILQ_FIRST(&asoc->sent_queue);
10484 for (i = 0; i < cnt_of_skipped; i++) {
10485 tp1 = TAILQ_NEXT(at, sctp_next);
10488 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10489 /* We don't report these */
10494 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10495 at->rec.data.fwd_tsn_cnt = 0;
10498 strseq->stream = ntohs(at->rec.data.stream_number);
10499 strseq->sequence = ntohs(at->rec.data.stream_seq);
10502 strseq_m->stream = ntohs(at->rec.data.stream_number);
10503 strseq_m->reserved = ntohs(0);
10504 strseq_m->msg_id = ntohl(at->rec.data.stream_seq);
10514 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10515 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10521 * Queue up a SACK or NR-SACK in the control queue.
10522 * We must first check to see if a SACK or NR-SACK is
10523 * somehow on the control queue.
10524 * If so, we will take and and remove the old one.
10526 struct sctp_association *asoc;
10527 struct sctp_tmit_chunk *chk, *a_chk;
10528 struct sctp_sack_chunk *sack;
10529 struct sctp_nr_sack_chunk *nr_sack;
10530 struct sctp_gap_ack_block *gap_descriptor;
10531 const struct sack_track *selector;
10536 int limit_reached = 0;
10537 unsigned int i, siz, j;
10538 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10541 uint32_t highest_tsn;
10546 if (stcb->asoc.nrsack_supported == 1) {
10547 type = SCTP_NR_SELECTIVE_ACK;
10549 type = SCTP_SELECTIVE_ACK;
10552 asoc = &stcb->asoc;
10553 SCTP_TCB_LOCK_ASSERT(stcb);
10554 if (asoc->last_data_chunk_from == NULL) {
10555 /* Hmm we never received anything */
10558 sctp_slide_mapping_arrays(stcb);
10559 sctp_set_rwnd(stcb, asoc);
10560 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10561 if (chk->rec.chunk_id.id == type) {
10562 /* Hmm, found a sack already on queue, remove it */
10563 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10564 asoc->ctrl_queue_cnt--;
10567 sctp_m_freem(a_chk->data);
10568 a_chk->data = NULL;
10570 if (a_chk->whoTo) {
10571 sctp_free_remote_addr(a_chk->whoTo);
10572 a_chk->whoTo = NULL;
10577 if (a_chk == NULL) {
10578 sctp_alloc_a_chunk(stcb, a_chk);
10579 if (a_chk == NULL) {
10580 /* No memory so we drop the idea, and set a timer */
10581 if (stcb->asoc.delayed_ack) {
10582 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10583 stcb->sctp_ep, stcb, NULL,
10584 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10585 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10586 stcb->sctp_ep, stcb, NULL);
10588 stcb->asoc.send_sack = 1;
10592 a_chk->copy_by_ref = 0;
10593 a_chk->rec.chunk_id.id = type;
10594 a_chk->rec.chunk_id.can_take_data = 1;
10596 /* Clear our pkt counts */
10597 asoc->data_pkts_seen = 0;
10600 a_chk->asoc = asoc;
10601 a_chk->snd_count = 0;
10602 a_chk->send_size = 0; /* fill in later */
10603 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10604 a_chk->whoTo = NULL;
10606 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10608 * Ok, the destination for the SACK is unreachable, lets see if
10609 * we can select an alternate to asoc->last_data_chunk_from
10611 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10612 if (a_chk->whoTo == NULL) {
10613 /* Nope, no alternate */
10614 a_chk->whoTo = asoc->last_data_chunk_from;
10617 a_chk->whoTo = asoc->last_data_chunk_from;
10619 if (a_chk->whoTo) {
10620 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10622 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10623 highest_tsn = asoc->highest_tsn_inside_map;
10625 highest_tsn = asoc->highest_tsn_inside_nr_map;
10627 if (highest_tsn == asoc->cumulative_tsn) {
10629 if (type == SCTP_SELECTIVE_ACK) {
10630 space_req = sizeof(struct sctp_sack_chunk);
10632 space_req = sizeof(struct sctp_nr_sack_chunk);
10635 /* gaps get a cluster */
10636 space_req = MCLBYTES;
10638 /* Ok now lets formulate a MBUF with our sack */
10639 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10640 if ((a_chk->data == NULL) ||
10641 (a_chk->whoTo == NULL)) {
10642 /* rats, no mbuf memory */
10644 /* was a problem with the destination */
10645 sctp_m_freem(a_chk->data);
10646 a_chk->data = NULL;
10648 sctp_free_a_chunk(stcb, a_chk, so_locked);
10649 /* sa_ignore NO_NULL_CHK */
10650 if (stcb->asoc.delayed_ack) {
10651 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10652 stcb->sctp_ep, stcb, NULL,
10653 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10654 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10655 stcb->sctp_ep, stcb, NULL);
10657 stcb->asoc.send_sack = 1;
10661 /* ok, lets go through and fill it in */
10662 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10663 space = (unsigned int)M_TRAILINGSPACE(a_chk->data);
10664 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10665 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10667 limit = mtod(a_chk->data, caddr_t);
10672 if ((asoc->sctp_cmt_on_off > 0) &&
10673 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10675 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10676 * received, then set high bit to 1, else 0. Reset
10679 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10680 asoc->cmt_dac_pkts_rcvd = 0;
10682 #ifdef SCTP_ASOCLOG_OF_TSNS
10683 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10684 stcb->asoc.cumack_log_atsnt++;
10685 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10686 stcb->asoc.cumack_log_atsnt = 0;
10689 /* reset the readers interpretation */
10690 stcb->freed_by_sorcv_sincelast = 0;
10692 if (type == SCTP_SELECTIVE_ACK) {
10693 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10695 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10696 if (highest_tsn > asoc->mapping_array_base_tsn) {
10697 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10699 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10703 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10704 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10705 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10706 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10708 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10712 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10715 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10717 if (((type == SCTP_SELECTIVE_ACK) &&
10718 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10719 ((type == SCTP_NR_SELECTIVE_ACK) &&
10720 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10721 /* we have a gap .. maybe */
10722 for (i = 0; i < siz; i++) {
10723 tsn_map = asoc->mapping_array[i];
10724 if (type == SCTP_SELECTIVE_ACK) {
10725 tsn_map |= asoc->nr_mapping_array[i];
10729 * Clear all bits corresponding to TSNs
10730 * smaller or equal to the cumulative TSN.
10732 tsn_map &= (~0U << (1 - offset));
10734 selector = &sack_array[tsn_map];
10735 if (mergeable && selector->right_edge) {
10737 * Backup, left and right edges were ok to
10743 if (selector->num_entries == 0)
10746 for (j = 0; j < selector->num_entries; j++) {
10747 if (mergeable && selector->right_edge) {
10749 * do a merge by NOT setting
10755 * no merge, set the left
10759 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10761 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10764 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10770 if (selector->left_edge) {
10774 if (limit_reached) {
10775 /* Reached the limit stop */
10781 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10782 (limit_reached == 0)) {
10786 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10787 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10789 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10792 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10795 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10797 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10798 /* we have a gap .. maybe */
10799 for (i = 0; i < siz; i++) {
10800 tsn_map = asoc->nr_mapping_array[i];
10803 * Clear all bits corresponding to
10804 * TSNs smaller or equal to the
10807 tsn_map &= (~0U << (1 - offset));
10809 selector = &sack_array[tsn_map];
10810 if (mergeable && selector->right_edge) {
10812 * Backup, left and right edges were
10815 num_nr_gap_blocks--;
10818 if (selector->num_entries == 0)
10821 for (j = 0; j < selector->num_entries; j++) {
10822 if (mergeable && selector->right_edge) {
10824 * do a merge by NOT
10831 * no merge, set the
10835 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10837 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10838 num_nr_gap_blocks++;
10840 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10846 if (selector->left_edge) {
10850 if (limit_reached) {
10851 /* Reached the limit stop */
10858 /* now we must add any dups we are going to report. */
10859 if ((limit_reached == 0) && (asoc->numduptsns)) {
10860 dup = (uint32_t *) gap_descriptor;
10861 for (i = 0; i < asoc->numduptsns; i++) {
10862 *dup = htonl(asoc->dup_tsns[i]);
10865 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10870 asoc->numduptsns = 0;
10873 * now that the chunk is prepared queue it to the control chunk
10876 if (type == SCTP_SELECTIVE_ACK) {
10877 a_chk->send_size = (uint16_t) (sizeof(struct sctp_sack_chunk) +
10878 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10879 num_dups * sizeof(int32_t));
10880 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10881 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10882 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10883 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10884 sack->sack.num_dup_tsns = htons(num_dups);
10885 sack->ch.chunk_type = type;
10886 sack->ch.chunk_flags = flags;
10887 sack->ch.chunk_length = htons(a_chk->send_size);
10889 a_chk->send_size = (uint16_t) (sizeof(struct sctp_nr_sack_chunk) +
10890 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10891 num_dups * sizeof(int32_t));
10892 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10893 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10894 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10895 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10896 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10897 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10898 nr_sack->nr_sack.reserved = 0;
10899 nr_sack->ch.chunk_type = type;
10900 nr_sack->ch.chunk_flags = flags;
10901 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10903 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10904 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10905 asoc->ctrl_queue_cnt++;
10906 asoc->send_sack = 0;
10907 SCTP_STAT_INCR(sctps_sendsacks);
10912 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10913 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10918 struct mbuf *m_abort, *m, *m_last;
10919 struct mbuf *m_out, *m_end = NULL;
10920 struct sctp_abort_chunk *abort;
10921 struct sctp_auth_chunk *auth = NULL;
10922 struct sctp_nets *net;
10924 uint32_t auth_offset = 0;
10925 uint16_t cause_len, chunk_len, padding_len;
10927 SCTP_TCB_LOCK_ASSERT(stcb);
10929 * Add an AUTH chunk, if chunk requires it and save the offset into
10930 * the chain for AUTH
10932 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10933 stcb->asoc.peer_auth_chunks)) {
10934 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10935 stcb, SCTP_ABORT_ASSOCIATION);
10936 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10940 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10941 if (m_abort == NULL) {
10943 sctp_m_freem(m_out);
10946 sctp_m_freem(operr);
10950 /* link in any error */
10951 SCTP_BUF_NEXT(m_abort) = operr;
10954 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10955 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10956 if (SCTP_BUF_NEXT(m) == NULL) {
10960 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10961 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10962 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10963 if (m_out == NULL) {
10964 /* NO Auth chunk prepended, so reserve space in front */
10965 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10968 /* Put AUTH chunk at the front of the chain */
10969 SCTP_BUF_NEXT(m_end) = m_abort;
10971 if (stcb->asoc.alternate) {
10972 net = stcb->asoc.alternate;
10974 net = stcb->asoc.primary_destination;
10976 /* Fill in the ABORT chunk header. */
10977 abort = mtod(m_abort, struct sctp_abort_chunk *);
10978 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10979 if (stcb->asoc.peer_vtag == 0) {
10980 /* This happens iff the assoc is in COOKIE-WAIT state. */
10981 vtag = stcb->asoc.my_vtag;
10982 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10984 vtag = stcb->asoc.peer_vtag;
10985 abort->ch.chunk_flags = 0;
10987 abort->ch.chunk_length = htons(chunk_len);
10988 /* Add padding, if necessary. */
10989 if (padding_len > 0) {
10990 if ((m_last == NULL) ||
10991 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10992 sctp_m_freem(m_out);
10996 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10997 (struct sockaddr *)&net->ro._l_addr,
10998 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10999 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
11000 stcb->asoc.primary_destination->port, NULL,
11003 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11007 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
11008 struct sctp_nets *net,
11011 /* formulate and SEND a SHUTDOWN-COMPLETE */
11012 struct mbuf *m_shutdown_comp;
11013 struct sctp_shutdown_complete_chunk *shutdown_complete;
11017 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
11018 if (m_shutdown_comp == NULL) {
11022 if (reflect_vtag) {
11023 flags = SCTP_HAD_NO_TCB;
11024 vtag = stcb->asoc.my_vtag;
11027 vtag = stcb->asoc.peer_vtag;
11029 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
11030 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11031 shutdown_complete->ch.chunk_flags = flags;
11032 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11033 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
11034 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
11035 (struct sockaddr *)&net->ro._l_addr,
11036 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
11037 stcb->sctp_ep->sctp_lport, stcb->rport,
11041 SCTP_SO_NOT_LOCKED);
11042 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11047 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
11048 struct sctphdr *sh, uint32_t vtag,
11049 uint8_t type, struct mbuf *cause,
11050 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11051 uint32_t vrf_id, uint16_t port)
11053 struct mbuf *o_pak;
11055 struct sctphdr *shout;
11056 struct sctp_chunkhdr *ch;
11058 #if defined(INET) || defined(INET6)
11059 struct udphdr *udp;
11063 int len, cause_len, padding_len;
11066 struct sockaddr_in *src_sin, *dst_sin;
11071 struct sockaddr_in6 *src_sin6, *dst_sin6;
11072 struct ip6_hdr *ip6;
11076 /* Compute the length of the cause and add final padding. */
11078 if (cause != NULL) {
11079 struct mbuf *m_at, *m_last = NULL;
11081 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
11082 if (SCTP_BUF_NEXT(m_at) == NULL)
11084 cause_len += SCTP_BUF_LEN(m_at);
11086 padding_len = cause_len % 4;
11087 if (padding_len != 0) {
11088 padding_len = 4 - padding_len;
11090 if (padding_len != 0) {
11091 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11092 sctp_m_freem(cause);
11099 /* Get an mbuf for the header. */
11100 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11101 switch (dst->sa_family) {
11104 len += sizeof(struct ip);
11109 len += sizeof(struct ip6_hdr);
11115 #if defined(INET) || defined(INET6)
11117 len += sizeof(struct udphdr);
11120 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11121 if (mout == NULL) {
11123 sctp_m_freem(cause);
11127 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11128 SCTP_BUF_LEN(mout) = len;
11129 SCTP_BUF_NEXT(mout) = cause;
11130 M_SETFIB(mout, fibnum);
11131 mout->m_pkthdr.flowid = mflowid;
11132 M_HASHTYPE_SET(mout, mflowtype);
11139 switch (dst->sa_family) {
11142 src_sin = (struct sockaddr_in *)src;
11143 dst_sin = (struct sockaddr_in *)dst;
11144 ip = mtod(mout, struct ip *);
11145 ip->ip_v = IPVERSION;
11146 ip->ip_hl = (sizeof(struct ip) >> 2);
11150 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11152 ip->ip_p = IPPROTO_UDP;
11154 ip->ip_p = IPPROTO_SCTP;
11156 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11157 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11159 len = sizeof(struct ip);
11160 shout = (struct sctphdr *)((caddr_t)ip + len);
11165 src_sin6 = (struct sockaddr_in6 *)src;
11166 dst_sin6 = (struct sockaddr_in6 *)dst;
11167 ip6 = mtod(mout, struct ip6_hdr *);
11168 ip6->ip6_flow = htonl(0x60000000);
11169 if (V_ip6_auto_flowlabel) {
11170 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11172 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11174 ip6->ip6_nxt = IPPROTO_UDP;
11176 ip6->ip6_nxt = IPPROTO_SCTP;
11178 ip6->ip6_src = dst_sin6->sin6_addr;
11179 ip6->ip6_dst = src_sin6->sin6_addr;
11180 len = sizeof(struct ip6_hdr);
11181 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11186 shout = mtod(mout, struct sctphdr *);
11189 #if defined(INET) || defined(INET6)
11191 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11192 sctp_m_freem(mout);
11195 udp = (struct udphdr *)shout;
11196 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11197 udp->uh_dport = port;
11199 udp->uh_ulen = htons((uint16_t) (sizeof(struct udphdr) +
11200 sizeof(struct sctphdr) +
11201 sizeof(struct sctp_chunkhdr) +
11202 cause_len + padding_len));
11203 len += sizeof(struct udphdr);
11204 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11209 shout->src_port = sh->dest_port;
11210 shout->dest_port = sh->src_port;
11211 shout->checksum = 0;
11213 shout->v_tag = htonl(vtag);
11215 shout->v_tag = sh->v_tag;
11217 len += sizeof(struct sctphdr);
11218 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11219 ch->chunk_type = type;
11221 ch->chunk_flags = 0;
11223 ch->chunk_flags = SCTP_HAD_NO_TCB;
11225 ch->chunk_length = htons((uint16_t) (sizeof(struct sctp_chunkhdr) + cause_len));
11226 len += sizeof(struct sctp_chunkhdr);
11227 len += cause_len + padding_len;
11229 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11230 sctp_m_freem(mout);
11233 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11234 switch (dst->sa_family) {
11239 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11244 ip->ip_len = htons(len);
11246 #if defined(SCTP_WITH_NO_CSUM)
11247 SCTP_STAT_INCR(sctps_sendnocrc);
11249 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11250 SCTP_STAT_INCR(sctps_sendswcrc);
11253 SCTP_ENABLE_UDP_CSUM(o_pak);
11256 #if defined(SCTP_WITH_NO_CSUM)
11257 SCTP_STAT_INCR(sctps_sendnocrc);
11259 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11260 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11261 SCTP_STAT_INCR(sctps_sendhwcrc);
11264 #ifdef SCTP_PACKET_LOGGING
11265 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11266 sctp_packet_log(o_pak);
11269 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11274 ip6->ip6_plen = (uint16_t) (len - sizeof(struct ip6_hdr));
11276 #if defined(SCTP_WITH_NO_CSUM)
11277 SCTP_STAT_INCR(sctps_sendnocrc);
11279 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11280 SCTP_STAT_INCR(sctps_sendswcrc);
11282 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11283 udp->uh_sum = 0xffff;
11286 #if defined(SCTP_WITH_NO_CSUM)
11287 SCTP_STAT_INCR(sctps_sendnocrc);
11289 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11290 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11291 SCTP_STAT_INCR(sctps_sendhwcrc);
11294 #ifdef SCTP_PACKET_LOGGING
11295 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11296 sctp_packet_log(o_pak);
11299 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11303 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11305 sctp_m_freem(mout);
11306 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11309 SCTP_STAT_INCR(sctps_sendpackets);
11310 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11311 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11316 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11317 struct sctphdr *sh,
11318 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11319 uint32_t vrf_id, uint16_t port)
11321 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11322 mflowtype, mflowid, fibnum,
11327 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11328 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11333 struct sctp_tmit_chunk *chk;
11334 struct sctp_heartbeat_chunk *hb;
11335 struct timeval now;
11337 SCTP_TCB_LOCK_ASSERT(stcb);
11341 (void)SCTP_GETTIME_TIMEVAL(&now);
11342 switch (net->ro._l_addr.sa.sa_family) {
11354 sctp_alloc_a_chunk(stcb, chk);
11356 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11359 chk->copy_by_ref = 0;
11360 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11361 chk->rec.chunk_id.can_take_data = 1;
11363 chk->asoc = &stcb->asoc;
11364 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11366 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11367 if (chk->data == NULL) {
11368 sctp_free_a_chunk(stcb, chk, so_locked);
11371 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11372 SCTP_BUF_LEN(chk->data) = chk->send_size;
11373 chk->sent = SCTP_DATAGRAM_UNSENT;
11374 chk->snd_count = 0;
11376 atomic_add_int(&chk->whoTo->ref_count, 1);
11377 /* Now we have a mbuf that we can fill in with the details */
11378 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11379 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11380 /* fill out chunk header */
11381 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11382 hb->ch.chunk_flags = 0;
11383 hb->ch.chunk_length = htons(chk->send_size);
11384 /* Fill out hb parameter */
11385 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11386 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11387 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11388 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11389 /* Did our user request this one, put it in */
11390 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11391 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11392 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11394 * we only take from the entropy pool if the address is not
11397 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11398 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11400 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11401 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11403 switch (net->ro._l_addr.sa.sa_family) {
11406 memcpy(hb->heartbeat.hb_info.address,
11407 &net->ro._l_addr.sin.sin_addr,
11408 sizeof(net->ro._l_addr.sin.sin_addr));
11413 memcpy(hb->heartbeat.hb_info.address,
11414 &net->ro._l_addr.sin6.sin6_addr,
11415 sizeof(net->ro._l_addr.sin6.sin6_addr));
11420 sctp_m_freem(chk->data);
11423 sctp_free_a_chunk(stcb, chk, so_locked);
11427 net->hb_responded = 0;
11428 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11429 stcb->asoc.ctrl_queue_cnt++;
11430 SCTP_STAT_INCR(sctps_sendheartbeat);
11435 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11438 struct sctp_association *asoc;
11439 struct sctp_ecne_chunk *ecne;
11440 struct sctp_tmit_chunk *chk;
11445 asoc = &stcb->asoc;
11446 SCTP_TCB_LOCK_ASSERT(stcb);
11447 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11448 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11449 /* found a previous ECN_ECHO update it if needed */
11450 uint32_t cnt, ctsn;
11452 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11453 ctsn = ntohl(ecne->tsn);
11454 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11455 ecne->tsn = htonl(high_tsn);
11456 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11458 cnt = ntohl(ecne->num_pkts_since_cwr);
11460 ecne->num_pkts_since_cwr = htonl(cnt);
11464 /* nope could not find one to update so we must build one */
11465 sctp_alloc_a_chunk(stcb, chk);
11469 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11470 chk->copy_by_ref = 0;
11471 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11472 chk->rec.chunk_id.can_take_data = 0;
11474 chk->asoc = &stcb->asoc;
11475 chk->send_size = sizeof(struct sctp_ecne_chunk);
11476 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11477 if (chk->data == NULL) {
11478 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11481 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11482 SCTP_BUF_LEN(chk->data) = chk->send_size;
11483 chk->sent = SCTP_DATAGRAM_UNSENT;
11484 chk->snd_count = 0;
11486 atomic_add_int(&chk->whoTo->ref_count, 1);
11488 stcb->asoc.ecn_echo_cnt_onq++;
11489 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11490 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11491 ecne->ch.chunk_flags = 0;
11492 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11493 ecne->tsn = htonl(high_tsn);
11494 ecne->num_pkts_since_cwr = htonl(1);
11495 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11496 asoc->ctrl_queue_cnt++;
11500 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11501 struct mbuf *m, int len, int iphlen, int bad_crc)
11503 struct sctp_association *asoc;
11504 struct sctp_pktdrop_chunk *drp;
11505 struct sctp_tmit_chunk *chk;
11511 struct sctp_chunkhdr *ch, chunk_buf;
11512 unsigned int chk_length;
11517 asoc = &stcb->asoc;
11518 SCTP_TCB_LOCK_ASSERT(stcb);
11519 if (asoc->pktdrop_supported == 0) {
11521 * peer must declare support before I send one.
11525 if (stcb->sctp_socket == NULL) {
11528 sctp_alloc_a_chunk(stcb, chk);
11532 chk->copy_by_ref = 0;
11533 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11534 chk->rec.chunk_id.can_take_data = 1;
11537 chk->send_size = len;
11538 /* Validate that we do not have an ABORT in here. */
11539 offset = iphlen + sizeof(struct sctphdr);
11540 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11541 sizeof(*ch), (uint8_t *) & chunk_buf);
11542 while (ch != NULL) {
11543 chk_length = ntohs(ch->chunk_length);
11544 if (chk_length < sizeof(*ch)) {
11545 /* break to abort land */
11548 switch (ch->chunk_type) {
11549 case SCTP_PACKET_DROPPED:
11550 case SCTP_ABORT_ASSOCIATION:
11551 case SCTP_INITIATION_ACK:
11553 * We don't respond with an PKT-DROP to an ABORT
11554 * or PKT-DROP. We also do not respond to an
11555 * INIT-ACK, because we can't know if the initiation
11556 * tag is correct or not.
11558 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11563 offset += SCTP_SIZE32(chk_length);
11564 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11565 sizeof(*ch), (uint8_t *) & chunk_buf);
11568 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11569 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11571 * only send 1 mtu worth, trim off the excess on the end.
11574 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11577 chk->asoc = &stcb->asoc;
11578 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11579 if (chk->data == NULL) {
11581 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11584 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11585 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11587 sctp_m_freem(chk->data);
11591 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11592 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11593 chk->book_size_scale = 0;
11595 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11596 drp->trunc_len = htons(fullsz);
11598 * Len is already adjusted to size minus overhead above take
11599 * out the pkt_drop chunk itself from it.
11601 chk->send_size = (uint16_t) (len - sizeof(struct sctp_pktdrop_chunk));
11602 len = chk->send_size;
11604 /* no truncation needed */
11605 drp->ch.chunk_flags = 0;
11606 drp->trunc_len = htons(0);
11609 drp->ch.chunk_flags |= SCTP_BADCRC;
11611 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11612 SCTP_BUF_LEN(chk->data) = chk->send_size;
11613 chk->sent = SCTP_DATAGRAM_UNSENT;
11614 chk->snd_count = 0;
11616 /* we should hit here */
11618 atomic_add_int(&chk->whoTo->ref_count, 1);
11622 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11623 drp->ch.chunk_length = htons(chk->send_size);
11624 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11628 drp->bottle_bw = htonl(spc);
11629 if (asoc->my_rwnd) {
11630 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11631 asoc->size_on_all_streams +
11632 asoc->my_rwnd_control_len +
11633 stcb->sctp_socket->so_rcv.sb_cc);
11636 * If my rwnd is 0, possibly from mbuf depletion as well as
11637 * space used, tell the peer there is NO space aka onq == bw
11639 drp->current_onq = htonl(spc);
11643 m_copydata(m, iphlen, len, (caddr_t)datap);
11644 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11645 asoc->ctrl_queue_cnt++;
11649 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11651 struct sctp_association *asoc;
11652 struct sctp_cwr_chunk *cwr;
11653 struct sctp_tmit_chunk *chk;
11655 SCTP_TCB_LOCK_ASSERT(stcb);
11659 asoc = &stcb->asoc;
11660 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11661 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11663 * found a previous CWR queued to same destination
11664 * update it if needed
11668 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11669 ctsn = ntohl(cwr->tsn);
11670 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11671 cwr->tsn = htonl(high_tsn);
11673 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11674 /* Make sure override is carried */
11675 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11680 sctp_alloc_a_chunk(stcb, chk);
11684 chk->copy_by_ref = 0;
11685 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11686 chk->rec.chunk_id.can_take_data = 1;
11688 chk->asoc = &stcb->asoc;
11689 chk->send_size = sizeof(struct sctp_cwr_chunk);
11690 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11691 if (chk->data == NULL) {
11692 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11695 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11696 SCTP_BUF_LEN(chk->data) = chk->send_size;
11697 chk->sent = SCTP_DATAGRAM_UNSENT;
11698 chk->snd_count = 0;
11700 atomic_add_int(&chk->whoTo->ref_count, 1);
11701 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11702 cwr->ch.chunk_type = SCTP_ECN_CWR;
11703 cwr->ch.chunk_flags = override;
11704 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11705 cwr->tsn = htonl(high_tsn);
11706 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11707 asoc->ctrl_queue_cnt++;
11711 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11712 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11714 uint16_t len, old_len, i;
11715 struct sctp_stream_reset_out_request *req_out;
11716 struct sctp_chunkhdr *ch;
11718 int number_entries = 0;
11720 ch = mtod(chk->data, struct sctp_chunkhdr *);
11721 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11722 /* get to new offset for the param. */
11723 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11724 /* now how long will this param be? */
11725 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11726 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11727 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11728 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11732 if (number_entries == 0) {
11735 if (number_entries == stcb->asoc.streamoutcnt) {
11736 number_entries = 0;
11738 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11739 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11741 len = (uint16_t) (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11742 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11743 req_out->ph.param_length = htons(len);
11744 req_out->request_seq = htonl(seq);
11745 req_out->response_seq = htonl(resp_seq);
11746 req_out->send_reset_at_tsn = htonl(last_sent);
11748 if (number_entries) {
11749 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11750 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11751 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11752 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11753 req_out->list_of_streams[at] = htons(i);
11755 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11756 if (at >= number_entries) {
11762 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11763 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11766 if (SCTP_SIZE32(len) > len) {
11768 * Need to worry about the pad we may end up adding to the
11769 * end. This is easy since the struct is either aligned to 4
11770 * bytes or 2 bytes off.
11772 req_out->list_of_streams[number_entries] = 0;
11774 /* now fix the chunk length */
11775 ch->chunk_length = htons(len + old_len);
11776 chk->book_size = len + old_len;
11777 chk->book_size_scale = 0;
11778 chk->send_size = SCTP_SIZE32(chk->book_size);
11779 SCTP_BUF_LEN(chk->data) = chk->send_size;
11784 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11785 int number_entries, uint16_t * list,
11788 uint16_t len, old_len, i;
11789 struct sctp_stream_reset_in_request *req_in;
11790 struct sctp_chunkhdr *ch;
11792 ch = mtod(chk->data, struct sctp_chunkhdr *);
11793 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11795 /* get to new offset for the param. */
11796 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11797 /* now how long will this param be? */
11798 len = (uint16_t) (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11799 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11800 req_in->ph.param_length = htons(len);
11801 req_in->request_seq = htonl(seq);
11802 if (number_entries) {
11803 for (i = 0; i < number_entries; i++) {
11804 req_in->list_of_streams[i] = htons(list[i]);
11807 if (SCTP_SIZE32(len) > len) {
11809 * Need to worry about the pad we may end up adding to the
11810 * end. This is easy since the struct is either aligned to 4
11811 * bytes or 2 bytes off.
11813 req_in->list_of_streams[number_entries] = 0;
11815 /* now fix the chunk length */
11816 ch->chunk_length = htons(len + old_len);
11817 chk->book_size = len + old_len;
11818 chk->book_size_scale = 0;
11819 chk->send_size = SCTP_SIZE32(chk->book_size);
11820 SCTP_BUF_LEN(chk->data) = chk->send_size;
11825 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11828 uint16_t len, old_len;
11829 struct sctp_stream_reset_tsn_request *req_tsn;
11830 struct sctp_chunkhdr *ch;
11832 ch = mtod(chk->data, struct sctp_chunkhdr *);
11833 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11835 /* get to new offset for the param. */
11836 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11837 /* now how long will this param be? */
11838 len = sizeof(struct sctp_stream_reset_tsn_request);
11839 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11840 req_tsn->ph.param_length = htons(len);
11841 req_tsn->request_seq = htonl(seq);
11843 /* now fix the chunk length */
11844 ch->chunk_length = htons(len + old_len);
11845 chk->send_size = len + old_len;
11846 chk->book_size = SCTP_SIZE32(chk->send_size);
11847 chk->book_size_scale = 0;
11848 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11853 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11854 uint32_t resp_seq, uint32_t result)
11856 uint16_t len, old_len;
11857 struct sctp_stream_reset_response *resp;
11858 struct sctp_chunkhdr *ch;
11860 ch = mtod(chk->data, struct sctp_chunkhdr *);
11861 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11863 /* get to new offset for the param. */
11864 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11865 /* now how long will this param be? */
11866 len = sizeof(struct sctp_stream_reset_response);
11867 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11868 resp->ph.param_length = htons(len);
11869 resp->response_seq = htonl(resp_seq);
11870 resp->result = ntohl(result);
11872 /* now fix the chunk length */
11873 ch->chunk_length = htons(len + old_len);
11874 chk->book_size = len + old_len;
11875 chk->book_size_scale = 0;
11876 chk->send_size = SCTP_SIZE32(chk->book_size);
11877 SCTP_BUF_LEN(chk->data) = chk->send_size;
11882 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11883 struct sctp_stream_reset_list *ent,
11886 struct sctp_association *asoc;
11887 struct sctp_tmit_chunk *chk;
11888 struct sctp_chunkhdr *ch;
11890 asoc = &stcb->asoc;
11893 * Reset our last reset action to the new one IP -> response
11894 * (PERFORMED probably). This assures that if we fail to send, a
11895 * retran from the peer will get the new response.
11897 asoc->last_reset_action[0] = response;
11898 if (asoc->stream_reset_outstanding) {
11901 sctp_alloc_a_chunk(stcb, chk);
11903 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11906 chk->copy_by_ref = 0;
11907 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11908 chk->rec.chunk_id.can_take_data = 0;
11910 chk->asoc = &stcb->asoc;
11911 chk->book_size = sizeof(struct sctp_chunkhdr);
11912 chk->send_size = SCTP_SIZE32(chk->book_size);
11913 chk->book_size_scale = 0;
11914 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11915 if (chk->data == NULL) {
11916 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11917 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11920 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11921 sctp_add_stream_reset_result(chk, ent->seq, response);
11922 /* setup chunk parameters */
11923 chk->sent = SCTP_DATAGRAM_UNSENT;
11924 chk->snd_count = 0;
11925 if (stcb->asoc.alternate) {
11926 chk->whoTo = stcb->asoc.alternate;
11928 chk->whoTo = stcb->asoc.primary_destination;
11930 ch = mtod(chk->data, struct sctp_chunkhdr *);
11931 ch->chunk_type = SCTP_STREAM_RESET;
11932 ch->chunk_flags = 0;
11933 ch->chunk_length = htons(chk->book_size);
11934 atomic_add_int(&chk->whoTo->ref_count, 1);
11935 SCTP_BUF_LEN(chk->data) = chk->send_size;
11936 /* insert the chunk for sending */
11937 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11940 asoc->ctrl_queue_cnt++;
11944 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11945 uint32_t resp_seq, uint32_t result,
11946 uint32_t send_una, uint32_t recv_next)
11948 uint16_t len, old_len;
11949 struct sctp_stream_reset_response_tsn *resp;
11950 struct sctp_chunkhdr *ch;
11952 ch = mtod(chk->data, struct sctp_chunkhdr *);
11953 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11955 /* get to new offset for the param. */
11956 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11957 /* now how long will this param be? */
11958 len = sizeof(struct sctp_stream_reset_response_tsn);
11959 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11960 resp->ph.param_length = htons(len);
11961 resp->response_seq = htonl(resp_seq);
11962 resp->result = htonl(result);
11963 resp->senders_next_tsn = htonl(send_una);
11964 resp->receivers_next_tsn = htonl(recv_next);
11966 /* now fix the chunk length */
11967 ch->chunk_length = htons(len + old_len);
11968 chk->book_size = len + old_len;
11969 chk->send_size = SCTP_SIZE32(chk->book_size);
11970 chk->book_size_scale = 0;
11971 SCTP_BUF_LEN(chk->data) = chk->send_size;
11976 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11980 uint16_t len, old_len;
11981 struct sctp_chunkhdr *ch;
11982 struct sctp_stream_reset_add_strm *addstr;
11984 ch = mtod(chk->data, struct sctp_chunkhdr *);
11985 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11987 /* get to new offset for the param. */
11988 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11989 /* now how long will this param be? */
11990 len = sizeof(struct sctp_stream_reset_add_strm);
11993 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11994 addstr->ph.param_length = htons(len);
11995 addstr->request_seq = htonl(seq);
11996 addstr->number_of_streams = htons(adding);
11997 addstr->reserved = 0;
11999 /* now fix the chunk length */
12000 ch->chunk_length = htons(len + old_len);
12001 chk->send_size = len + old_len;
12002 chk->book_size = SCTP_SIZE32(chk->send_size);
12003 chk->book_size_scale = 0;
12004 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12009 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
12013 uint16_t len, old_len;
12014 struct sctp_chunkhdr *ch;
12015 struct sctp_stream_reset_add_strm *addstr;
12017 ch = mtod(chk->data, struct sctp_chunkhdr *);
12018 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
12020 /* get to new offset for the param. */
12021 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
12022 /* now how long will this param be? */
12023 len = sizeof(struct sctp_stream_reset_add_strm);
12025 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
12026 addstr->ph.param_length = htons(len);
12027 addstr->request_seq = htonl(seq);
12028 addstr->number_of_streams = htons(adding);
12029 addstr->reserved = 0;
12031 /* now fix the chunk length */
12032 ch->chunk_length = htons(len + old_len);
12033 chk->send_size = len + old_len;
12034 chk->book_size = SCTP_SIZE32(chk->send_size);
12035 chk->book_size_scale = 0;
12036 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
12041 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
12043 struct sctp_association *asoc;
12044 struct sctp_tmit_chunk *chk;
12045 struct sctp_chunkhdr *ch;
12048 asoc = &stcb->asoc;
12049 asoc->trigger_reset = 0;
12050 if (asoc->stream_reset_outstanding) {
12053 sctp_alloc_a_chunk(stcb, chk);
12055 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12058 chk->copy_by_ref = 0;
12059 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12060 chk->rec.chunk_id.can_take_data = 0;
12062 chk->asoc = &stcb->asoc;
12063 chk->book_size = sizeof(struct sctp_chunkhdr);
12064 chk->send_size = SCTP_SIZE32(chk->book_size);
12065 chk->book_size_scale = 0;
12066 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12067 if (chk->data == NULL) {
12068 sctp_free_a_chunk(stcb, chk, so_locked);
12069 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12072 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12074 /* setup chunk parameters */
12075 chk->sent = SCTP_DATAGRAM_UNSENT;
12076 chk->snd_count = 0;
12077 if (stcb->asoc.alternate) {
12078 chk->whoTo = stcb->asoc.alternate;
12080 chk->whoTo = stcb->asoc.primary_destination;
12082 ch = mtod(chk->data, struct sctp_chunkhdr *);
12083 ch->chunk_type = SCTP_STREAM_RESET;
12084 ch->chunk_flags = 0;
12085 ch->chunk_length = htons(chk->book_size);
12086 atomic_add_int(&chk->whoTo->ref_count, 1);
12087 SCTP_BUF_LEN(chk->data) = chk->send_size;
12088 seq = stcb->asoc.str_reset_seq_out;
12089 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
12091 asoc->stream_reset_outstanding++;
12093 m_freem(chk->data);
12095 sctp_free_a_chunk(stcb, chk, so_locked);
12098 asoc->str_reset = chk;
12099 /* insert the chunk for sending */
12100 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12103 asoc->ctrl_queue_cnt++;
12105 if (stcb->asoc.send_sack) {
12106 sctp_send_sack(stcb, so_locked);
12108 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12113 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12114 uint16_t number_entries, uint16_t * list,
12115 uint8_t send_in_req,
12116 uint8_t send_tsn_req,
12117 uint8_t add_stream,
12119 uint16_t adding_i, uint8_t peer_asked)
12121 struct sctp_association *asoc;
12122 struct sctp_tmit_chunk *chk;
12123 struct sctp_chunkhdr *ch;
12124 int can_send_out_req = 0;
12127 asoc = &stcb->asoc;
12128 if (asoc->stream_reset_outstanding) {
12130 * Already one pending, must get ACK back to clear the flag.
12132 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12135 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12136 (add_stream == 0)) {
12137 /* nothing to do */
12138 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12141 if (send_tsn_req && send_in_req) {
12142 /* error, can't do that */
12143 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12145 } else if (send_in_req) {
12146 can_send_out_req = 1;
12148 if (number_entries > (MCLBYTES -
12149 SCTP_MIN_OVERHEAD -
12150 sizeof(struct sctp_chunkhdr) -
12151 sizeof(struct sctp_stream_reset_out_request)) /
12152 sizeof(uint16_t)) {
12153 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12156 sctp_alloc_a_chunk(stcb, chk);
12158 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12161 chk->copy_by_ref = 0;
12162 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12163 chk->rec.chunk_id.can_take_data = 0;
12165 chk->asoc = &stcb->asoc;
12166 chk->book_size = sizeof(struct sctp_chunkhdr);
12167 chk->send_size = SCTP_SIZE32(chk->book_size);
12168 chk->book_size_scale = 0;
12170 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12171 if (chk->data == NULL) {
12172 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12173 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12176 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12178 /* setup chunk parameters */
12179 chk->sent = SCTP_DATAGRAM_UNSENT;
12180 chk->snd_count = 0;
12181 if (stcb->asoc.alternate) {
12182 chk->whoTo = stcb->asoc.alternate;
12184 chk->whoTo = stcb->asoc.primary_destination;
12186 atomic_add_int(&chk->whoTo->ref_count, 1);
12187 ch = mtod(chk->data, struct sctp_chunkhdr *);
12188 ch->chunk_type = SCTP_STREAM_RESET;
12189 ch->chunk_flags = 0;
12190 ch->chunk_length = htons(chk->book_size);
12191 SCTP_BUF_LEN(chk->data) = chk->send_size;
12193 seq = stcb->asoc.str_reset_seq_out;
12194 if (can_send_out_req) {
12197 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12200 asoc->stream_reset_outstanding++;
12203 if ((add_stream & 1) &&
12204 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12205 /* Need to allocate more */
12206 struct sctp_stream_out *oldstream;
12207 struct sctp_stream_queue_pending *sp, *nsp;
12210 #if defined(SCTP_DETAILED_STR_STATS)
12215 oldstream = stcb->asoc.strmout;
12216 /* get some more */
12217 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12218 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12220 if (stcb->asoc.strmout == NULL) {
12223 stcb->asoc.strmout = oldstream;
12224 /* Turn off the bit */
12225 x = add_stream & 0xfe;
12230 * Ok now we proceed with copying the old out stuff and
12231 * initializing the new stuff.
12233 SCTP_TCB_SEND_LOCK(stcb);
12234 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12235 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12236 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12237 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12238 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
12239 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12240 stcb->asoc.strmout[i].stream_no = i;
12241 stcb->asoc.strmout[i].state = oldstream[i].state;
12242 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
12243 /* now anything on those queues? */
12244 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12245 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12246 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12248 /* Now move assoc pointers too */
12249 if (stcb->asoc.last_out_stream == &oldstream[i]) {
12250 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
12252 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
12253 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
12256 /* now the new streams */
12257 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12258 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12259 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12260 stcb->asoc.strmout[i].chunks_on_queues = 0;
12261 #if defined(SCTP_DETAILED_STR_STATS)
12262 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12263 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12264 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12267 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12268 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12270 stcb->asoc.strmout[i].next_sequence_send = 0x0;
12271 stcb->asoc.strmout[i].stream_no = i;
12272 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12273 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12274 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12276 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12277 SCTP_FREE(oldstream, SCTP_M_STRMO);
12278 SCTP_TCB_SEND_UNLOCK(stcb);
12281 if ((add_stream & 1) && (adding_o > 0)) {
12282 asoc->strm_pending_add_size = adding_o;
12283 asoc->peer_req_out = peer_asked;
12284 sctp_add_an_out_stream(chk, seq, adding_o);
12286 asoc->stream_reset_outstanding++;
12288 if ((add_stream & 2) && (adding_i > 0)) {
12289 sctp_add_an_in_stream(chk, seq, adding_i);
12291 asoc->stream_reset_outstanding++;
12294 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12296 asoc->stream_reset_outstanding++;
12298 if (send_tsn_req) {
12299 sctp_add_stream_reset_tsn(chk, seq);
12300 asoc->stream_reset_outstanding++;
12302 asoc->str_reset = chk;
12303 /* insert the chunk for sending */
12304 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12307 asoc->ctrl_queue_cnt++;
12308 if (stcb->asoc.send_sack) {
12309 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12311 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12316 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12317 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12318 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12319 uint32_t vrf_id, uint16_t port)
12321 /* Don't respond to an ABORT with an ABORT. */
12322 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12324 sctp_m_freem(cause);
12327 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12328 mflowtype, mflowid, fibnum,
12334 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12335 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12336 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12337 uint32_t vrf_id, uint16_t port)
12339 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12340 mflowtype, mflowid, fibnum,
12345 static struct mbuf *
12346 sctp_copy_resume(struct uio *uio,
12348 int user_marks_eor,
12351 struct mbuf **new_tail)
12355 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12356 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12358 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12361 *sndout = m_length(m, NULL);
12362 *new_tail = m_last(m);
12368 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12372 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12374 if (sp->data == NULL) {
12375 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12378 sp->tail_mbuf = m_last(sp->data);
12384 static struct sctp_stream_queue_pending *
12385 sctp_copy_it_in(struct sctp_tcb *stcb,
12386 struct sctp_association *asoc,
12387 struct sctp_sndrcvinfo *srcv,
12389 struct sctp_nets *net,
12391 int user_marks_eor,
12395 * This routine must be very careful in its work. Protocol
12396 * processing is up and running so care must be taken to spl...()
12397 * when you need to do something that may effect the stcb/asoc. The
12398 * sb is locked however. When data is copied the protocol processing
12399 * should be enabled since this is a slower operation...
12401 struct sctp_stream_queue_pending *sp = NULL;
12405 /* Now can we send this? */
12406 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12407 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12408 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12409 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12410 /* got data while shutting down */
12411 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12412 *error = ECONNRESET;
12415 sctp_alloc_a_strmoq(stcb, sp);
12417 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12422 sp->sender_all_done = 0;
12423 sp->sinfo_flags = srcv->sinfo_flags;
12424 sp->timetolive = srcv->sinfo_timetolive;
12425 sp->ppid = srcv->sinfo_ppid;
12426 sp->context = srcv->sinfo_context;
12428 sp->msg_id = atomic_fetchadd_int(&stcb->asoc.assoc_msg_id, 1);
12429 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12431 sp->stream = srcv->sinfo_stream;
12432 sp->length = (uint32_t) min(uio->uio_resid, max_send_len);
12433 if ((sp->length == (uint32_t) uio->uio_resid) &&
12434 ((user_marks_eor == 0) ||
12435 (srcv->sinfo_flags & SCTP_EOF) ||
12436 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12437 sp->msg_is_complete = 1;
12439 sp->msg_is_complete = 0;
12441 sp->sender_all_done = 0;
12442 sp->some_taken = 0;
12443 sp->put_last_out = 0;
12444 resv_in_first = sizeof(struct sctp_data_chunk);
12445 sp->data = sp->tail_mbuf = NULL;
12446 if (sp->length == 0) {
12450 if (srcv->sinfo_keynumber_valid) {
12451 sp->auth_keyid = srcv->sinfo_keynumber;
12453 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12455 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12456 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12457 sp->holds_key_ref = 1;
12459 *error = sctp_copy_one(sp, uio, resv_in_first);
12462 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12465 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12467 atomic_add_int(&sp->net->ref_count, 1);
12471 sctp_set_prsctp_policy(sp);
12479 sctp_sosend(struct socket *so,
12480 struct sockaddr *addr,
12483 struct mbuf *control,
12488 int error, use_sndinfo = 0;
12489 struct sctp_sndrcvinfo sndrcvninfo;
12490 struct sockaddr *addr_to_use;
12492 #if defined(INET) && defined(INET6)
12493 struct sockaddr_in sin;
12498 /* process cmsg snd/rcv info (maybe a assoc-id) */
12499 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12500 sizeof(sndrcvninfo))) {
12505 addr_to_use = addr;
12506 #if defined(INET) && defined(INET6)
12507 if ((addr) && (addr->sa_family == AF_INET6)) {
12508 struct sockaddr_in6 *sin6;
12510 sin6 = (struct sockaddr_in6 *)addr;
12511 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12512 in6_sin6_2_sin(&sin, sin6);
12513 addr_to_use = (struct sockaddr *)&sin;
12517 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12520 use_sndinfo ? &sndrcvninfo : NULL
12528 sctp_lower_sosend(struct socket *so,
12529 struct sockaddr *addr,
12531 struct mbuf *i_pak,
12532 struct mbuf *control,
12534 struct sctp_sndrcvinfo *srcv
12539 unsigned int sndlen = 0, max_len;
12541 struct mbuf *top = NULL;
12542 int queue_only = 0, queue_only_for_init = 0;
12543 int free_cnt_applied = 0;
12545 int now_filled = 0;
12546 unsigned int inqueue_bytes = 0;
12547 struct sctp_block_entry be;
12548 struct sctp_inpcb *inp;
12549 struct sctp_tcb *stcb = NULL;
12550 struct timeval now;
12551 struct sctp_nets *net;
12552 struct sctp_association *asoc;
12553 struct sctp_inpcb *t_inp;
12554 int user_marks_eor;
12555 int create_lock_applied = 0;
12556 int nagle_applies = 0;
12557 int some_on_control = 0;
12558 int got_all_of_the_send = 0;
12559 int hold_tcblock = 0;
12560 int non_blocking = 0;
12561 uint32_t local_add_more, local_soresv = 0;
12563 uint16_t sinfo_flags;
12564 sctp_assoc_t sinfo_assoc_id;
12571 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12573 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12576 SCTP_RELEASE_PKT(i_pak);
12580 if ((uio == NULL) && (i_pak == NULL)) {
12581 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12584 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12585 atomic_add_int(&inp->total_sends, 1);
12587 if (uio->uio_resid < 0) {
12588 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12591 sndlen = (unsigned int)uio->uio_resid;
12593 top = SCTP_HEADER_TO_CHAIN(i_pak);
12594 sndlen = SCTP_HEADER_LEN(i_pak);
12596 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12599 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12600 (inp->sctp_socket->so_qlimit)) {
12601 /* The listener can NOT send */
12602 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12607 * Pre-screen address, if one is given the sin-len
12608 * must be set correctly!
12611 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12613 switch (raddr->sa.sa_family) {
12616 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12617 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12621 port = raddr->sin.sin_port;
12626 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12627 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12631 port = raddr->sin6.sin6_port;
12635 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12636 error = EAFNOSUPPORT;
12643 sinfo_flags = srcv->sinfo_flags;
12644 sinfo_assoc_id = srcv->sinfo_assoc_id;
12645 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12646 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12647 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12651 if (srcv->sinfo_flags)
12652 SCTP_STAT_INCR(sctps_sends_with_flags);
12654 sinfo_flags = inp->def_send.sinfo_flags;
12655 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12657 if (sinfo_flags & SCTP_SENDALL) {
12658 /* its a sendall */
12659 error = sctp_sendall(inp, uio, top, srcv);
12663 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12664 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12668 /* now we must find the assoc */
12669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12670 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12671 SCTP_INP_RLOCK(inp);
12672 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12674 SCTP_TCB_LOCK(stcb);
12677 SCTP_INP_RUNLOCK(inp);
12678 } else if (sinfo_assoc_id) {
12679 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12682 * Since we did not use findep we must
12683 * increment it, and if we don't find a tcb
12686 SCTP_INP_WLOCK(inp);
12687 SCTP_INP_INCR_REF(inp);
12688 SCTP_INP_WUNLOCK(inp);
12689 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12690 if (stcb == NULL) {
12691 SCTP_INP_WLOCK(inp);
12692 SCTP_INP_DECR_REF(inp);
12693 SCTP_INP_WUNLOCK(inp);
12698 if ((stcb == NULL) && (addr)) {
12699 /* Possible implicit send? */
12700 SCTP_ASOC_CREATE_LOCK(inp);
12701 create_lock_applied = 1;
12702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12703 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12704 /* Should I really unlock ? */
12705 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12710 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12711 (addr->sa_family == AF_INET6)) {
12712 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12716 SCTP_INP_WLOCK(inp);
12717 SCTP_INP_INCR_REF(inp);
12718 SCTP_INP_WUNLOCK(inp);
12719 /* With the lock applied look again */
12720 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12721 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12722 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12724 if (stcb == NULL) {
12725 SCTP_INP_WLOCK(inp);
12726 SCTP_INP_DECR_REF(inp);
12727 SCTP_INP_WUNLOCK(inp);
12734 if (t_inp != inp) {
12735 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12740 if (stcb == NULL) {
12741 if (addr == NULL) {
12742 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12746 /* We must go ahead and start the INIT process */
12749 if ((sinfo_flags & SCTP_ABORT) ||
12750 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12752 * User asks to abort a non-existant assoc,
12753 * or EOF a non-existant assoc with no data
12755 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12759 /* get an asoc/stcb struct */
12760 vrf_id = inp->def_vrf_id;
12762 if (create_lock_applied == 0) {
12763 panic("Error, should hold create lock and I don't?");
12766 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12767 inp->sctp_ep.pre_open_stream_count,
12770 if (stcb == NULL) {
12771 /* Error is setup for us in the call */
12774 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12775 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12777 * Set the connected flag so we can queue
12780 soisconnecting(so);
12783 if (create_lock_applied) {
12784 SCTP_ASOC_CREATE_UNLOCK(inp);
12785 create_lock_applied = 0;
12787 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12790 * Turn on queue only flag to prevent data from
12794 asoc = &stcb->asoc;
12795 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12796 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12798 /* initialize authentication params for the assoc */
12799 sctp_initialize_auth_params(inp, stcb);
12802 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12803 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12804 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12810 /* out with the INIT */
12811 queue_only_for_init = 1;
12813 * we may want to dig in after this call and adjust the MTU
12814 * value. It defaulted to 1500 (constant) but the ro
12815 * structure may now have an update and thus we may need to
12816 * change it BEFORE we append the message.
12820 asoc = &stcb->asoc;
12822 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12823 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12825 net = sctp_findnet(stcb, addr);
12828 if ((net == NULL) ||
12829 ((port != 0) && (port != stcb->rport))) {
12830 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12835 if (stcb->asoc.alternate) {
12836 net = stcb->asoc.alternate;
12838 net = stcb->asoc.primary_destination;
12841 atomic_add_int(&stcb->total_sends, 1);
12842 /* Keep the stcb from being freed under our feet */
12843 atomic_add_int(&asoc->refcnt, 1);
12844 free_cnt_applied = 1;
12846 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12847 if (sndlen > asoc->smallest_mtu) {
12848 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12853 if (SCTP_SO_IS_NBIO(so)
12854 || (flags & MSG_NBIO)
12858 /* would we block? */
12859 if (non_blocking) {
12860 if (hold_tcblock == 0) {
12861 SCTP_TCB_LOCK(stcb);
12864 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12865 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12866 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12867 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12868 if (sndlen > SCTP_SB_LIMIT_SND(so))
12871 error = EWOULDBLOCK;
12874 stcb->asoc.sb_send_resv += sndlen;
12875 SCTP_TCB_UNLOCK(stcb);
12878 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12880 local_soresv = sndlen;
12881 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12882 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12883 error = ECONNRESET;
12886 if (create_lock_applied) {
12887 SCTP_ASOC_CREATE_UNLOCK(inp);
12888 create_lock_applied = 0;
12890 /* Is the stream no. valid? */
12891 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12892 /* Invalid stream number */
12893 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12897 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12898 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12900 * Can't queue any data while stream reset is underway.
12902 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12907 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12910 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12911 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12914 /* we are now done with all control */
12916 sctp_m_freem(control);
12919 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12920 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12921 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12922 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12923 if (srcv->sinfo_flags & SCTP_ABORT) {
12926 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12927 error = ECONNRESET;
12931 /* Ok, we will attempt a msgsnd :> */
12933 p->td_ru.ru_msgsnd++;
12935 /* Are we aborting? */
12936 if (srcv->sinfo_flags & SCTP_ABORT) {
12938 int tot_demand, tot_out = 0, max_out;
12940 SCTP_STAT_INCR(sctps_sends_with_abort);
12941 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12942 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12943 /* It has to be up before we abort */
12944 /* how big is the user initiated abort? */
12945 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12949 if (hold_tcblock) {
12950 SCTP_TCB_UNLOCK(stcb);
12954 struct mbuf *cntm = NULL;
12956 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12958 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12959 tot_out += SCTP_BUF_LEN(cntm);
12963 /* Must fit in a MTU */
12965 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12966 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12968 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12972 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12975 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12979 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12980 max_out -= sizeof(struct sctp_abort_msg);
12981 if (tot_out > max_out) {
12985 struct sctp_paramhdr *ph;
12987 /* now move forward the data pointer */
12988 ph = mtod(mm, struct sctp_paramhdr *);
12989 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12990 ph->param_length = htons((uint16_t) (sizeof(struct sctp_paramhdr) + tot_out));
12992 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12994 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12997 * Here if we can't get his data we
12998 * still abort we just don't get to
12999 * send the users note :-0
13006 SCTP_BUF_NEXT(mm) = top;
13010 if (hold_tcblock == 0) {
13011 SCTP_TCB_LOCK(stcb);
13013 atomic_add_int(&stcb->asoc.refcnt, -1);
13014 free_cnt_applied = 0;
13015 /* release this lock, otherwise we hang on ourselves */
13016 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
13017 /* now relock the stcb so everything is sane */
13021 * In this case top is already chained to mm avoid double
13022 * free, since we free it below if top != NULL and driver
13023 * would free it after sending the packet out
13030 /* Calculate the maximum we can send */
13031 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13032 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13033 if (non_blocking) {
13034 /* we already checked for non-blocking above. */
13037 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13042 if (hold_tcblock) {
13043 SCTP_TCB_UNLOCK(stcb);
13046 if (asoc->strmout == NULL) {
13047 /* huh? software error */
13048 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13052 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13053 if ((user_marks_eor == 0) &&
13054 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13055 /* It will NEVER fit */
13056 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13060 if ((uio == NULL) && user_marks_eor) {
13062 * We do not support eeor mode for
13063 * sending with mbuf chains (like sendfile).
13065 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13069 if (user_marks_eor) {
13070 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13073 * For non-eeor the whole message must fit in
13074 * the socket send buffer.
13076 local_add_more = sndlen;
13079 if (non_blocking) {
13080 goto skip_preblock;
13082 if (((max_len <= local_add_more) &&
13083 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13085 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13086 /* No room right now ! */
13087 SOCKBUF_LOCK(&so->so_snd);
13088 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13089 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13090 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13091 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13092 (unsigned int)SCTP_SB_LIMIT_SND(so),
13095 stcb->asoc.stream_queue_cnt,
13096 stcb->asoc.chunks_on_out_queue,
13097 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13098 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13099 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13102 stcb->block_entry = &be;
13103 error = sbwait(&so->so_snd);
13104 stcb->block_entry = NULL;
13105 if (error || so->so_error || be.error) {
13108 error = so->so_error;
13113 SOCKBUF_UNLOCK(&so->so_snd);
13116 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13117 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13118 asoc, stcb->asoc.total_output_queue_size);
13120 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13123 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13125 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13126 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13130 SOCKBUF_UNLOCK(&so->so_snd);
13133 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13137 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13138 * case NOTE: uio will be null when top/mbuf is passed
13141 if (srcv->sinfo_flags & SCTP_EOF) {
13142 got_all_of_the_send = 1;
13145 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13151 struct sctp_stream_queue_pending *sp;
13152 struct sctp_stream_out *strm;
13155 SCTP_TCB_SEND_LOCK(stcb);
13156 if ((asoc->stream_locked) &&
13157 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13158 SCTP_TCB_SEND_UNLOCK(stcb);
13159 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13163 SCTP_TCB_SEND_UNLOCK(stcb);
13165 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13166 if (strm->last_msg_incomplete == 0) {
13168 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13169 if ((sp == NULL) || (error)) {
13172 SCTP_TCB_SEND_LOCK(stcb);
13173 if (sp->msg_is_complete) {
13174 strm->last_msg_incomplete = 0;
13175 asoc->stream_locked = 0;
13178 * Just got locked to this guy in case of an
13181 strm->last_msg_incomplete = 1;
13182 if (stcb->asoc.idata_supported == 0) {
13183 asoc->stream_locked = 1;
13184 asoc->stream_locked_on = srcv->sinfo_stream;
13186 sp->sender_all_done = 0;
13188 sctp_snd_sb_alloc(stcb, sp->length);
13189 atomic_add_int(&asoc->stream_queue_cnt, 1);
13190 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13191 SCTP_STAT_INCR(sctps_sends_with_unord);
13193 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13194 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13195 SCTP_TCB_SEND_UNLOCK(stcb);
13197 SCTP_TCB_SEND_LOCK(stcb);
13198 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13199 SCTP_TCB_SEND_UNLOCK(stcb);
13201 /* ???? Huh ??? last msg is gone */
13203 panic("Warning: Last msg marked incomplete, yet nothing left?");
13205 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13206 strm->last_msg_incomplete = 0;
13212 while (uio->uio_resid > 0) {
13213 /* How much room do we have? */
13214 struct mbuf *new_tail, *mm;
13216 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13217 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13221 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13222 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13223 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13226 if (hold_tcblock) {
13227 SCTP_TCB_UNLOCK(stcb);
13230 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13231 if ((mm == NULL) || error) {
13237 /* Update the mbuf and count */
13238 SCTP_TCB_SEND_LOCK(stcb);
13239 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13241 * we need to get out. Peer probably
13245 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13246 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13247 error = ECONNRESET;
13249 SCTP_TCB_SEND_UNLOCK(stcb);
13252 if (sp->tail_mbuf) {
13253 /* tack it to the end */
13254 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13255 sp->tail_mbuf = new_tail;
13257 /* A stolen mbuf */
13259 sp->tail_mbuf = new_tail;
13261 sctp_snd_sb_alloc(stcb, sndout);
13262 atomic_add_int(&sp->length, sndout);
13265 /* Did we reach EOR? */
13266 if ((uio->uio_resid == 0) &&
13267 ((user_marks_eor == 0) ||
13268 (srcv->sinfo_flags & SCTP_EOF) ||
13269 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13270 sp->msg_is_complete = 1;
13272 sp->msg_is_complete = 0;
13274 SCTP_TCB_SEND_UNLOCK(stcb);
13276 if (uio->uio_resid == 0) {
13281 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13283 * This is ugly but we must assure locking
13286 if (hold_tcblock == 0) {
13287 SCTP_TCB_LOCK(stcb);
13290 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13291 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13292 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13293 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13299 SCTP_TCB_UNLOCK(stcb);
13302 /* wait for space now */
13303 if (non_blocking) {
13304 /* Non-blocking io in place out */
13307 /* What about the INIT, send it maybe */
13308 if (queue_only_for_init) {
13309 if (hold_tcblock == 0) {
13310 SCTP_TCB_LOCK(stcb);
13313 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13314 /* a collision took us forward? */
13317 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13318 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13322 if ((net->flight_size > net->cwnd) &&
13323 (asoc->sctp_cmt_on_off == 0)) {
13324 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13326 } else if (asoc->ifp_had_enobuf) {
13327 SCTP_STAT_INCR(sctps_ifnomemqueued);
13328 if (net->flight_size > (2 * net->mtu)) {
13331 asoc->ifp_had_enobuf = 0;
13333 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13334 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13335 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13336 (stcb->asoc.total_flight > 0) &&
13337 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13338 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13341 * Ok, Nagle is set on and we have data outstanding.
13342 * Don't send anything and let SACKs drive out the
13343 * data unless we have a "full" segment to send.
13345 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13346 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13348 SCTP_STAT_INCR(sctps_naglequeued);
13351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13352 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13353 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13355 SCTP_STAT_INCR(sctps_naglesent);
13358 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13360 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13361 nagle_applies, un_sent);
13362 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13363 stcb->asoc.total_flight,
13364 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13366 if (queue_only_for_init)
13367 queue_only_for_init = 0;
13368 if ((queue_only == 0) && (nagle_applies == 0)) {
13370 * need to start chunk output
13371 * before blocking.. note that if
13372 * a lock is already applied, then
13373 * the input via the net is happening
13374 * and I don't need to start output :-D
13376 if (hold_tcblock == 0) {
13377 if (SCTP_TCB_TRYLOCK(stcb)) {
13379 sctp_chunk_output(inp,
13381 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13384 sctp_chunk_output(inp,
13386 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13388 if (hold_tcblock == 1) {
13389 SCTP_TCB_UNLOCK(stcb);
13393 SOCKBUF_LOCK(&so->so_snd);
13395 * This is a bit strange, but I think it will
13396 * work. The total_output_queue_size is locked and
13397 * protected by the TCB_LOCK, which we just released.
13398 * There is a race that can occur between releasing it
13399 * above, and me getting the socket lock, where sacks
13400 * come in but we have not put the SB_WAIT on the
13401 * so_snd buffer to get the wakeup. After the LOCK
13402 * is applied the sack_processing will also need to
13403 * LOCK the so->so_snd to do the actual sowwakeup(). So
13404 * once we have the socket buffer lock if we recheck the
13405 * size we KNOW we will get to sleep safely with the
13406 * wakeup flag in place.
13408 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13409 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13410 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13411 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13412 asoc, (size_t)uio->uio_resid);
13415 stcb->block_entry = &be;
13416 error = sbwait(&so->so_snd);
13417 stcb->block_entry = NULL;
13419 if (error || so->so_error || be.error) {
13422 error = so->so_error;
13427 SOCKBUF_UNLOCK(&so->so_snd);
13430 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13431 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13432 asoc, stcb->asoc.total_output_queue_size);
13435 SOCKBUF_UNLOCK(&so->so_snd);
13436 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13440 SCTP_TCB_SEND_LOCK(stcb);
13442 if (sp->msg_is_complete == 0) {
13443 strm->last_msg_incomplete = 1;
13444 if (stcb->asoc.idata_supported == 0) {
13445 asoc->stream_locked = 1;
13446 asoc->stream_locked_on = srcv->sinfo_stream;
13449 sp->sender_all_done = 1;
13450 strm->last_msg_incomplete = 0;
13451 asoc->stream_locked = 0;
13454 SCTP_PRINTF("Huh no sp TSNH?\n");
13455 strm->last_msg_incomplete = 0;
13456 asoc->stream_locked = 0;
13458 SCTP_TCB_SEND_UNLOCK(stcb);
13459 if (uio->uio_resid == 0) {
13460 got_all_of_the_send = 1;
13463 /* We send in a 0, since we do NOT have any locks */
13464 error = sctp_msg_append(stcb, net, top, srcv, 0);
13466 if (srcv->sinfo_flags & SCTP_EOF) {
13468 * This should only happen for Panda for the mbuf
13469 * send case, which does NOT yet support EEOR mode.
13470 * Thus, we can just set this flag to do the proper
13473 got_all_of_the_send = 1;
13481 if ((srcv->sinfo_flags & SCTP_EOF) &&
13482 (got_all_of_the_send == 1)) {
13485 SCTP_STAT_INCR(sctps_sends_with_eof);
13487 if (hold_tcblock == 0) {
13488 SCTP_TCB_LOCK(stcb);
13491 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13492 if (TAILQ_EMPTY(&asoc->send_queue) &&
13493 TAILQ_EMPTY(&asoc->sent_queue) &&
13495 if (asoc->locked_on_sending) {
13498 /* there is nothing queued to send, so I'm done... */
13499 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13500 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13501 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13502 struct sctp_nets *netp;
13504 /* only send SHUTDOWN the first time through */
13505 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13506 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13508 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13509 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13510 sctp_stop_timers_for_shutdown(stcb);
13511 if (stcb->asoc.alternate) {
13512 netp = stcb->asoc.alternate;
13514 netp = stcb->asoc.primary_destination;
13516 sctp_send_shutdown(stcb, netp);
13517 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13519 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13520 asoc->primary_destination);
13524 * we still got (or just got) data to send, so set
13528 * XXX sockets draft says that SCTP_EOF should be
13529 * sent with no data. currently, we will allow user
13530 * data to be sent first and move to
13533 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13534 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13535 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13536 if (hold_tcblock == 0) {
13537 SCTP_TCB_LOCK(stcb);
13540 if (asoc->locked_on_sending) {
13541 /* Locked to send out the data */
13542 struct sctp_stream_queue_pending *sp;
13544 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13546 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13547 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13550 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13551 if (TAILQ_EMPTY(&asoc->send_queue) &&
13552 TAILQ_EMPTY(&asoc->sent_queue) &&
13553 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13554 struct mbuf *op_err;
13555 char msg[SCTP_DIAG_INFO_LEN];
13558 if (free_cnt_applied) {
13559 atomic_add_int(&stcb->asoc.refcnt, -1);
13560 free_cnt_applied = 0;
13562 snprintf(msg, sizeof(msg),
13563 "%s:%d at %s", __FILE__, __LINE__, __func__);
13564 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13566 sctp_abort_an_association(stcb->sctp_ep, stcb,
13567 op_err, SCTP_SO_LOCKED);
13569 * now relock the stcb so everything
13576 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13577 asoc->primary_destination);
13578 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13583 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13584 some_on_control = 1;
13586 if (queue_only_for_init) {
13587 if (hold_tcblock == 0) {
13588 SCTP_TCB_LOCK(stcb);
13591 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13592 /* a collision took us forward? */
13595 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13596 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13600 if ((net->flight_size > net->cwnd) &&
13601 (stcb->asoc.sctp_cmt_on_off == 0)) {
13602 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13604 } else if (asoc->ifp_had_enobuf) {
13605 SCTP_STAT_INCR(sctps_ifnomemqueued);
13606 if (net->flight_size > (2 * net->mtu)) {
13609 asoc->ifp_had_enobuf = 0;
13611 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13612 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13613 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13614 (stcb->asoc.total_flight > 0) &&
13615 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13616 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13618 * Ok, Nagle is set on and we have data outstanding.
13619 * Don't send anything and let SACKs drive out the
13620 * data unless wen have a "full" segment to send.
13622 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13623 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13625 SCTP_STAT_INCR(sctps_naglequeued);
13628 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13629 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13630 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13632 SCTP_STAT_INCR(sctps_naglesent);
13635 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13636 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13637 nagle_applies, un_sent);
13638 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13639 stcb->asoc.total_flight,
13640 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13642 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13643 /* we can attempt to send too. */
13644 if (hold_tcblock == 0) {
13646 * If there is activity recv'ing sacks no need to
13649 if (SCTP_TCB_TRYLOCK(stcb)) {
13650 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13654 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13656 } else if ((queue_only == 0) &&
13657 (stcb->asoc.peers_rwnd == 0) &&
13658 (stcb->asoc.total_flight == 0)) {
13659 /* We get to have a probe outstanding */
13660 if (hold_tcblock == 0) {
13662 SCTP_TCB_LOCK(stcb);
13664 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13665 } else if (some_on_control) {
13666 int num_out, reason, frag_point;
13668 /* Here we do control only */
13669 if (hold_tcblock == 0) {
13671 SCTP_TCB_LOCK(stcb);
13673 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13674 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13675 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13677 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13678 queue_only, stcb->asoc.peers_rwnd, un_sent,
13679 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13680 stcb->asoc.total_output_queue_size, error);
13685 if (local_soresv && stcb) {
13686 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13688 if (create_lock_applied) {
13689 SCTP_ASOC_CREATE_UNLOCK(inp);
13691 if ((stcb) && hold_tcblock) {
13692 SCTP_TCB_UNLOCK(stcb);
13694 if (stcb && free_cnt_applied) {
13695 atomic_add_int(&stcb->asoc.refcnt, -1);
13699 if (mtx_owned(&stcb->tcb_mtx)) {
13700 panic("Leaving with tcb mtx owned?");
13702 if (mtx_owned(&stcb->tcb_send_mtx)) {
13703 panic("Leaving with tcb send mtx owned?");
13711 sctp_m_freem(control);
13718 * generate an AUTHentication chunk, if required
13721 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13722 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13723 struct sctp_tcb *stcb, uint8_t chunk)
13725 struct mbuf *m_auth;
13726 struct sctp_auth_chunk *auth;
13730 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13734 if (stcb->asoc.auth_supported == 0) {
13737 /* does the requested chunk require auth? */
13738 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13741 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13742 if (m_auth == NULL) {
13746 /* reserve some space if this will be the first mbuf */
13748 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13749 /* fill in the AUTH chunk details */
13750 auth = mtod(m_auth, struct sctp_auth_chunk *);
13751 bzero(auth, sizeof(*auth));
13752 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13753 auth->ch.chunk_flags = 0;
13754 chunk_len = sizeof(*auth) +
13755 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13756 auth->ch.chunk_length = htons(chunk_len);
13757 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13758 /* key id and hmac digest will be computed and filled in upon send */
13760 /* save the offset where the auth was inserted into the chain */
13762 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13763 *offset += SCTP_BUF_LEN(cn);
13766 /* update length and return pointer to the auth chunk */
13767 SCTP_BUF_LEN(m_auth) = chunk_len;
13768 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13769 if (auth_ret != NULL)
13777 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13779 struct nd_prefix *pfx = NULL;
13780 struct nd_pfxrouter *pfxrtr = NULL;
13781 struct sockaddr_in6 gw6;
13783 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13786 /* get prefix entry of address */
13787 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13788 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13790 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13791 &src6->sin6_addr, &pfx->ndpr_mask))
13794 /* no prefix entry in the prefix list */
13796 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13797 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13800 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13801 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13803 /* search installed gateway from prefix entry */
13804 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13805 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13806 gw6.sin6_family = AF_INET6;
13807 gw6.sin6_len = sizeof(struct sockaddr_in6);
13808 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13809 sizeof(struct in6_addr));
13810 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13811 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13812 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13813 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13814 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13815 ro->ro_rt->rt_gateway)) {
13816 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13820 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13827 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13830 struct sockaddr_in *sin, *mask;
13831 struct ifaddr *ifa;
13832 struct in_addr srcnetaddr, gwnetaddr;
13834 if (ro == NULL || ro->ro_rt == NULL ||
13835 sifa->address.sa.sa_family != AF_INET) {
13838 ifa = (struct ifaddr *)sifa->ifa;
13839 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13840 sin = &sifa->address.sin;
13841 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13842 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13843 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13844 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13846 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13847 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13848 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13849 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13850 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13851 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {