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 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 prefered -- 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 resticted\n");
3164 SCTP_PRINTF("Stcb is null - no print\n");
3166 atomic_add_int(&sifa->refcount, 1);
3171 * plan_d: We are in trouble. No preferred address on the emit
3172 * interface. And not even a preferred address on all interfaces. Go
3173 * out and see if we can find an acceptable address somewhere
3174 * amongst all interfaces.
3176 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3177 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3178 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3179 /* wrong base scope */
3182 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3184 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3185 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3186 &sctp_ifa->address.sin.sin_addr) != 0)) {
3191 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3192 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3193 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3197 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3198 (non_asoc_addr_ok == 0))
3200 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3206 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3210 if (((non_asoc_addr_ok == 0) &&
3211 (sctp_is_addr_restricted(stcb, sifa))) ||
3212 (non_asoc_addr_ok &&
3213 (sctp_is_addr_restricted(stcb, sifa)) &&
3214 (!sctp_is_addr_pending(stcb, sifa)))) {
3216 * It is restricted for some
3217 * reason.. probably not yet added.
3227 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3228 stcb->asoc.scope.ipv4_local_scope = 1;
3230 goto again_with_private_addresses_allowed;
3231 } else if (retried == 1) {
3232 stcb->asoc.scope.ipv4_local_scope = 0;
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;
3329 * Rules: - Find the route if needed, cache if I can. - Look at
3330 * interface address in route, Is it in the bound list. If so we
3331 * have the best source. - If not we must rotate amongst the
3336 * Do we need to pay attention to scope. We can have a private address
3337 * or a global address we are sourcing or sending to. So if we draw
3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3341 * ------------------------------------------
3342 * source * dest * result
3343 * -----------------------------------------
3344 * <a> Private * Global * NAT
3345 * -----------------------------------------
3346 * <b> Private * Private * No problem
3347 * -----------------------------------------
3348 * <c> Global * Private * Huh, How will this work?
3349 * -----------------------------------------
3350 * <d> Global * Global * No Problem
3351 *------------------------------------------
3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3354 *------------------------------------------
3355 * source * dest * result
3356 * -----------------------------------------
3357 * <a> Linklocal * Global *
3358 * -----------------------------------------
3359 * <b> Linklocal * Linklocal * No problem
3360 * -----------------------------------------
3361 * <c> Global * Linklocal * Huh, How will this work?
3362 * -----------------------------------------
3363 * <d> Global * Global * No Problem
3364 *------------------------------------------
3365 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3367 * And then we add to that what happens if there are multiple addresses
3368 * assigned to an interface. Remember the ifa on a ifn is a linked
3369 * list of addresses. So one interface can have more than one IP
3370 * address. What happens if we have both a private and a global
3371 * address? Do we then use context of destination to sort out which
3372 * one is best? And what about NAT's sending P->G may get you a NAT
3373 * translation, or should you select the G thats on the interface in
3378 * - count the number of addresses on the interface.
3379 * - if it is one, no problem except case <c>.
3380 * For <a> we will assume a NAT out there.
3381 * - if there are more than one, then we need to worry about scope P
3382 * or G. We should prefer G -> G and P -> P if possible.
3383 * Then as a secondary fall back to mixed types G->P being a last
3385 * - The above all works for bound all, but bound specific we need to
3386 * use the same concept but instead only consider the bound
3387 * addresses. If the bound set is NOT assigned to the interface then
3388 * we must use rotation amongst the bound addresses..
3390 if (ro->ro_rt == NULL) {
3392 * Need a route to cache.
3394 SCTP_RTALLOC(ro, vrf_id);
3396 if (ro->ro_rt == NULL) {
3399 fam = ro->ro_dst.sa_family;
3400 dest_is_priv = dest_is_loop = 0;
3401 /* Setup our scopes for the destination */
3405 /* Scope based on outbound address */
3406 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3409 /* mark it as local */
3410 net->addr_is_local = 1;
3412 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3419 /* Scope based on outbound address */
3420 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3421 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3423 * If the address is a loopback address, which
3424 * consists of "::1" OR "fe80::1%lo0", we are
3425 * loopback scope. But we don't use dest_is_priv
3426 * (link local addresses).
3430 /* mark it as local */
3431 net->addr_is_local = 1;
3433 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3440 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3441 SCTP_IPI_ADDR_RLOCK();
3442 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3446 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3447 dest_is_priv, dest_is_loop,
3448 non_asoc_addr_ok, fam);
3449 SCTP_IPI_ADDR_RUNLOCK();
3456 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3457 vrf_id, dest_is_priv,
3459 non_asoc_addr_ok, fam);
3461 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3466 SCTP_IPI_ADDR_RUNLOCK();
3471 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3474 int tlen, at, found;
3475 struct sctp_sndinfo sndinfo;
3476 struct sctp_prinfo prinfo;
3477 struct sctp_authinfo authinfo;
3479 tlen = SCTP_BUF_LEN(control);
3483 * Independent of how many mbufs, find the c_type inside the control
3484 * structure and copy out the data.
3487 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3488 /* There is not enough room for one more. */
3491 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3492 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3493 /* We dont't have a complete CMSG header. */
3496 if (((int)cmh.cmsg_len + at) > tlen) {
3497 /* We don't have the complete CMSG. */
3500 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3501 ((c_type == cmh.cmsg_type) ||
3502 ((c_type == SCTP_SNDRCV) &&
3503 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3504 (cmh.cmsg_type == SCTP_PRINFO) ||
3505 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3506 if (c_type == cmh.cmsg_type) {
3507 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3510 /* It is exactly what we want. Copy it out. */
3511 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3514 struct sctp_sndrcvinfo *sndrcvinfo;
3516 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3518 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3521 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3523 switch (cmh.cmsg_type) {
3525 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3528 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3529 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3530 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3531 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3532 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3533 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3536 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3539 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3540 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3541 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3543 sndrcvinfo->sinfo_timetolive = 0;
3545 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3548 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3551 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3552 sndrcvinfo->sinfo_keynumber_valid = 1;
3553 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3561 at += CMSG_ALIGN(cmh.cmsg_len);
3567 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3571 struct sctp_initmsg initmsg;
3574 struct sockaddr_in sin;
3578 struct sockaddr_in6 sin6;
3582 tlen = SCTP_BUF_LEN(control);
3585 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3586 /* There is not enough room for one more. */
3590 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3591 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3592 /* We dont't have a complete CMSG header. */
3596 if (((int)cmh.cmsg_len + at) > tlen) {
3597 /* We don't have the complete CMSG. */
3601 if (cmh.cmsg_level == IPPROTO_SCTP) {
3602 switch (cmh.cmsg_type) {
3604 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3608 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3609 if (initmsg.sinit_max_attempts)
3610 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3611 if (initmsg.sinit_num_ostreams)
3612 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3613 if (initmsg.sinit_max_instreams)
3614 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3615 if (initmsg.sinit_max_init_timeo)
3616 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3617 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3618 struct sctp_stream_out *tmp_str;
3621 #if defined(SCTP_DETAILED_STR_STATS)
3626 /* Default is NOT correct */
3627 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3628 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3629 SCTP_TCB_UNLOCK(stcb);
3630 SCTP_MALLOC(tmp_str,
3631 struct sctp_stream_out *,
3632 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3634 SCTP_TCB_LOCK(stcb);
3635 if (tmp_str != NULL) {
3636 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3637 stcb->asoc.strmout = tmp_str;
3638 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3640 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3643 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3644 stcb->asoc.strmout[i].chunks_on_queues = 0;
3645 stcb->asoc.strmout[i].next_sequence_send = 0;
3646 #if defined(SCTP_DETAILED_STR_STATS)
3647 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3648 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3649 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3652 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3653 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3655 stcb->asoc.strmout[i].stream_no = i;
3656 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3657 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3662 case SCTP_DSTADDRV4:
3663 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3667 memset(&sin, 0, sizeof(struct sockaddr_in));
3668 sin.sin_family = AF_INET;
3669 sin.sin_len = sizeof(struct sockaddr_in);
3670 sin.sin_port = stcb->rport;
3671 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3672 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3673 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3674 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3678 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3679 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3686 case SCTP_DSTADDRV6:
3687 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3691 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3692 sin6.sin6_family = AF_INET6;
3693 sin6.sin6_len = sizeof(struct sockaddr_in6);
3694 sin6.sin6_port = stcb->rport;
3695 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3696 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3697 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3702 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3703 in6_sin6_2_sin(&sin, &sin6);
3704 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3705 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3706 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3710 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3711 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3717 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3718 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3728 at += CMSG_ALIGN(cmh.cmsg_len);
3733 static struct sctp_tcb *
3734 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3736 struct mbuf *control,
3737 struct sctp_nets **net_p,
3742 struct sctp_tcb *stcb;
3743 struct sockaddr *addr;
3746 struct sockaddr_in sin;
3750 struct sockaddr_in6 sin6;
3754 tlen = SCTP_BUF_LEN(control);
3757 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3758 /* There is not enough room for one more. */
3762 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3763 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3764 /* We dont't have a complete CMSG header. */
3768 if (((int)cmh.cmsg_len + at) > tlen) {
3769 /* We don't have the complete CMSG. */
3773 if (cmh.cmsg_level == IPPROTO_SCTP) {
3774 switch (cmh.cmsg_type) {
3776 case SCTP_DSTADDRV4:
3777 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3781 memset(&sin, 0, sizeof(struct sockaddr_in));
3782 sin.sin_family = AF_INET;
3783 sin.sin_len = sizeof(struct sockaddr_in);
3784 sin.sin_port = port;
3785 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3786 addr = (struct sockaddr *)&sin;
3790 case SCTP_DSTADDRV6:
3791 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3795 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3796 sin6.sin6_family = AF_INET6;
3797 sin6.sin6_len = sizeof(struct sockaddr_in6);
3798 sin6.sin6_port = port;
3799 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3801 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3802 in6_sin6_2_sin(&sin, &sin6);
3803 addr = (struct sockaddr *)&sin;
3806 addr = (struct sockaddr *)&sin6;
3814 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3820 at += CMSG_ALIGN(cmh.cmsg_len);
3825 static struct mbuf *
3826 sctp_add_cookie(struct mbuf *init, int init_offset,
3827 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3829 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3830 struct sctp_state_cookie *stc;
3831 struct sctp_paramhdr *ph;
3836 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3837 sizeof(struct sctp_paramhdr)), 0,
3838 M_NOWAIT, 1, MT_DATA);
3842 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3843 if (copy_init == NULL) {
3847 #ifdef SCTP_MBUF_LOGGING
3848 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3849 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3852 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3854 if (copy_initack == NULL) {
3856 sctp_m_freem(copy_init);
3859 #ifdef SCTP_MBUF_LOGGING
3860 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3861 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3864 /* easy side we just drop it on the end */
3865 ph = mtod(mret, struct sctp_paramhdr *);
3866 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3867 sizeof(struct sctp_paramhdr);
3868 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3869 sizeof(struct sctp_paramhdr));
3870 ph->param_type = htons(SCTP_STATE_COOKIE);
3871 ph->param_length = 0; /* fill in at the end */
3872 /* Fill in the stc cookie data */
3873 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3875 /* tack the INIT and then the INIT-ACK onto the chain */
3877 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3878 cookie_sz += SCTP_BUF_LEN(m_at);
3879 if (SCTP_BUF_NEXT(m_at) == NULL) {
3880 SCTP_BUF_NEXT(m_at) = copy_init;
3884 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3885 cookie_sz += SCTP_BUF_LEN(m_at);
3886 if (SCTP_BUF_NEXT(m_at) == NULL) {
3887 SCTP_BUF_NEXT(m_at) = copy_initack;
3891 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3892 cookie_sz += SCTP_BUF_LEN(m_at);
3893 if (SCTP_BUF_NEXT(m_at) == NULL) {
3897 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3899 /* no space, so free the entire chain */
3903 SCTP_BUF_LEN(sig) = 0;
3904 SCTP_BUF_NEXT(m_at) = sig;
3906 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3907 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3909 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3910 cookie_sz += SCTP_SIGNATURE_SIZE;
3911 ph->param_length = htons(cookie_sz);
3917 sctp_get_ect(struct sctp_tcb *stcb)
3919 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3920 return (SCTP_ECT0_BIT);
3926 #if defined(INET) || defined(INET6)
3928 sctp_handle_no_route(struct sctp_tcb *stcb,
3929 struct sctp_nets *net,
3932 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3935 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3936 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3937 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3938 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3939 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3940 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3944 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3945 net->dest_state &= ~SCTP_ADDR_PF;
3949 if (net == stcb->asoc.primary_destination) {
3950 /* need a new primary */
3951 struct sctp_nets *alt;
3953 alt = sctp_find_alternate_net(stcb, net, 0);
3955 if (stcb->asoc.alternate) {
3956 sctp_free_remote_addr(stcb->asoc.alternate);
3958 stcb->asoc.alternate = alt;
3959 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3960 if (net->ro._s_addr) {
3961 sctp_free_ifa(net->ro._s_addr);
3962 net->ro._s_addr = NULL;
3964 net->src_addr_selected = 0;
3974 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3975 struct sctp_tcb *stcb, /* may be NULL */
3976 struct sctp_nets *net,
3977 struct sockaddr *to,
3979 uint32_t auth_offset,
3980 struct sctp_auth_chunk *auth,
3981 uint16_t auth_keyid,
3982 int nofragment_flag,
3989 union sctp_sockstore *over_addr,
3990 uint8_t mflowtype, uint32_t mflowid,
3991 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3992 int so_locked SCTP_UNUSED
3997 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4000 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4001 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4002 * - fill in the HMAC digest of any AUTH chunk in the packet.
4003 * - calculate and fill in the SCTP checksum.
4004 * - prepend an IP address header.
4005 * - if boundall use INADDR_ANY.
4006 * - if boundspecific do source address selection.
4007 * - set fragmentation option for ipV4.
4008 * - On return from IP output, check/adjust mtu size of output
4009 * interface and smallest_mtu size as well.
4011 /* Will need ifdefs around this */
4013 struct sctphdr *sctphdr;
4017 #if defined(INET) || defined(INET6)
4021 #if defined(INET) || defined(INET6)
4023 sctp_route_t *ro = NULL;
4024 struct udphdr *udp = NULL;
4029 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4030 struct socket *so = NULL;
4034 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4035 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4039 #if defined(INET) || defined(INET6)
4041 vrf_id = stcb->asoc.vrf_id;
4043 vrf_id = inp->def_vrf_id;
4046 /* fill in the HMAC digest for any AUTH chunk in the packet */
4047 if ((auth != NULL) && (stcb != NULL)) {
4048 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4051 tos_value = net->dscp;
4053 tos_value = stcb->asoc.default_dscp;
4055 tos_value = inp->sctp_ep.default_dscp;
4058 switch (to->sa_family) {
4062 struct ip *ip = NULL;
4063 sctp_route_t iproute;
4066 len = sizeof(struct ip) + sizeof(struct sctphdr);
4068 len += sizeof(struct udphdr);
4070 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4073 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4076 SCTP_ALIGN_TO_END(newm, len);
4077 SCTP_BUF_LEN(newm) = len;
4078 SCTP_BUF_NEXT(newm) = m;
4081 m->m_pkthdr.flowid = net->flowid;
4082 M_HASHTYPE_SET(m, net->flowtype);
4084 m->m_pkthdr.flowid = mflowid;
4085 M_HASHTYPE_SET(m, mflowtype);
4087 packet_length = sctp_calculate_len(m);
4088 ip = mtod(m, struct ip *);
4089 ip->ip_v = IPVERSION;
4090 ip->ip_hl = (sizeof(struct ip) >> 2);
4091 if (tos_value == 0) {
4093 * This means especially, that it is not set
4094 * at the SCTP layer. So use the value from
4097 tos_value = inp->ip_inp.inp.inp_ip_tos;
4101 tos_value |= sctp_get_ect(stcb);
4103 if ((nofragment_flag) && (port == 0)) {
4104 ip->ip_off = htons(IP_DF);
4106 ip->ip_off = htons(0);
4108 /* FreeBSD has a function for ip_id's */
4109 ip->ip_id = ip_newid();
4111 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4112 ip->ip_len = htons(packet_length);
4113 ip->ip_tos = tos_value;
4115 ip->ip_p = IPPROTO_UDP;
4117 ip->ip_p = IPPROTO_SCTP;
4122 memset(&iproute, 0, sizeof(iproute));
4123 memcpy(&ro->ro_dst, to, to->sa_len);
4125 ro = (sctp_route_t *) & net->ro;
4127 /* Now the address selection part */
4128 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4130 /* call the routine to select the src address */
4131 if (net && out_of_asoc_ok == 0) {
4132 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4133 sctp_free_ifa(net->ro._s_addr);
4134 net->ro._s_addr = NULL;
4135 net->src_addr_selected = 0;
4141 if (net->src_addr_selected == 0) {
4142 /* Cache the source address */
4143 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4146 net->src_addr_selected = 1;
4148 if (net->ro._s_addr == NULL) {
4149 /* No route to host */
4150 net->src_addr_selected = 0;
4151 sctp_handle_no_route(stcb, net, so_locked);
4152 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4154 return (EHOSTUNREACH);
4156 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4158 if (over_addr == NULL) {
4159 struct sctp_ifa *_lsrc;
4161 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4165 if (_lsrc == NULL) {
4166 sctp_handle_no_route(stcb, net, so_locked);
4167 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4169 return (EHOSTUNREACH);
4171 ip->ip_src = _lsrc->address.sin.sin_addr;
4172 sctp_free_ifa(_lsrc);
4174 ip->ip_src = over_addr->sin.sin_addr;
4175 SCTP_RTALLOC(ro, vrf_id);
4179 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4180 sctp_handle_no_route(stcb, net, so_locked);
4181 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4183 return (EHOSTUNREACH);
4185 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4186 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4187 udp->uh_dport = port;
4188 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4190 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4194 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4196 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4199 sctphdr->src_port = src_port;
4200 sctphdr->dest_port = dest_port;
4201 sctphdr->v_tag = v_tag;
4202 sctphdr->checksum = 0;
4205 * If source address selection fails and we find no
4206 * route then the ip_output should fail as well with
4207 * a NO_ROUTE_TO_HOST type error. We probably should
4208 * catch that somewhere and abort the association
4209 * right away (assuming this is an INIT being sent).
4211 if (ro->ro_rt == NULL) {
4213 * src addr selection failed to find a route
4214 * (or valid source addr), so we can't get
4215 * there from here (yet)!
4217 sctp_handle_no_route(stcb, net, so_locked);
4218 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4220 return (EHOSTUNREACH);
4222 if (ro != &iproute) {
4223 memcpy(&iproute, ro, sizeof(*ro));
4225 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4226 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4228 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4229 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4232 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4233 /* failed to prepend data, give up */
4234 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4238 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4240 #if defined(SCTP_WITH_NO_CSUM)
4241 SCTP_STAT_INCR(sctps_sendnocrc);
4243 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4244 SCTP_STAT_INCR(sctps_sendswcrc);
4247 SCTP_ENABLE_UDP_CSUM(o_pak);
4250 #if defined(SCTP_WITH_NO_CSUM)
4251 SCTP_STAT_INCR(sctps_sendnocrc);
4253 m->m_pkthdr.csum_flags = CSUM_SCTP;
4254 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4255 SCTP_STAT_INCR(sctps_sendhwcrc);
4258 #ifdef SCTP_PACKET_LOGGING
4259 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4260 sctp_packet_log(o_pak);
4262 /* send it out. table id is taken from stcb */
4263 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4264 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4265 so = SCTP_INP_SO(inp);
4266 SCTP_SOCKET_UNLOCK(so, 0);
4269 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4270 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4271 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4272 atomic_add_int(&stcb->asoc.refcnt, 1);
4273 SCTP_TCB_UNLOCK(stcb);
4274 SCTP_SOCKET_LOCK(so, 0);
4275 SCTP_TCB_LOCK(stcb);
4276 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4279 SCTP_STAT_INCR(sctps_sendpackets);
4280 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4282 SCTP_STAT_INCR(sctps_senderrors);
4284 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4286 /* free tempy routes */
4290 * PMTU check versus smallest asoc MTU goes
4293 if ((ro->ro_rt != NULL) &&
4294 (net->ro._s_addr)) {
4297 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4299 mtu -= sizeof(struct udphdr);
4301 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4302 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4305 } else if (ro->ro_rt == NULL) {
4306 /* route was freed */
4307 if (net->ro._s_addr &&
4308 net->src_addr_selected) {
4309 sctp_free_ifa(net->ro._s_addr);
4310 net->ro._s_addr = NULL;
4312 net->src_addr_selected = 0;
4321 uint32_t flowlabel, flowinfo;
4322 struct ip6_hdr *ip6h;
4323 struct route_in6 ip6route;
4325 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4327 struct sockaddr_in6 lsa6_storage;
4329 u_short prev_port = 0;
4333 flowlabel = net->flowlabel;
4335 flowlabel = stcb->asoc.default_flowlabel;
4337 flowlabel = inp->sctp_ep.default_flowlabel;
4339 if (flowlabel == 0) {
4341 * This means especially, that it is not set
4342 * at the SCTP layer. So use the value from
4345 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4347 flowlabel &= 0x000fffff;
4348 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4350 len += sizeof(struct udphdr);
4352 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4355 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4358 SCTP_ALIGN_TO_END(newm, len);
4359 SCTP_BUF_LEN(newm) = len;
4360 SCTP_BUF_NEXT(newm) = m;
4363 m->m_pkthdr.flowid = net->flowid;
4364 M_HASHTYPE_SET(m, net->flowtype);
4366 m->m_pkthdr.flowid = mflowid;
4367 M_HASHTYPE_SET(m, mflowtype);
4369 packet_length = sctp_calculate_len(m);
4371 ip6h = mtod(m, struct ip6_hdr *);
4372 /* protect *sin6 from overwrite */
4373 sin6 = (struct sockaddr_in6 *)to;
4377 /* KAME hack: embed scopeid */
4378 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4379 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4383 memset(&ip6route, 0, sizeof(ip6route));
4384 ro = (sctp_route_t *) & ip6route;
4385 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4387 ro = (sctp_route_t *) & net->ro;
4390 * We assume here that inp_flow is in host byte
4391 * order within the TCB!
4393 if (tos_value == 0) {
4395 * This means especially, that it is not set
4396 * at the SCTP layer. So use the value from
4399 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4403 tos_value |= sctp_get_ect(stcb);
4407 flowinfo |= tos_value;
4409 flowinfo |= flowlabel;
4410 ip6h->ip6_flow = htonl(flowinfo);
4412 ip6h->ip6_nxt = IPPROTO_UDP;
4414 ip6h->ip6_nxt = IPPROTO_SCTP;
4416 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4417 ip6h->ip6_dst = sin6->sin6_addr;
4420 * Add SRC address selection here: we can only reuse
4421 * to a limited degree the kame src-addr-sel, since
4422 * we can try their selection but it may not be
4425 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4426 lsa6_tmp.sin6_family = AF_INET6;
4427 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4429 if (net && out_of_asoc_ok == 0) {
4430 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4431 sctp_free_ifa(net->ro._s_addr);
4432 net->ro._s_addr = NULL;
4433 net->src_addr_selected = 0;
4439 if (net->src_addr_selected == 0) {
4440 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4441 /* KAME hack: embed scopeid */
4442 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4443 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4446 /* Cache the source address */
4447 net->ro._s_addr = sctp_source_address_selection(inp,
4453 (void)sa6_recoverscope(sin6);
4454 net->src_addr_selected = 1;
4456 if (net->ro._s_addr == NULL) {
4457 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4458 net->src_addr_selected = 0;
4459 sctp_handle_no_route(stcb, net, so_locked);
4460 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4462 return (EHOSTUNREACH);
4464 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4466 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4467 /* KAME hack: embed scopeid */
4468 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4469 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4472 if (over_addr == NULL) {
4473 struct sctp_ifa *_lsrc;
4475 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4479 if (_lsrc == NULL) {
4480 sctp_handle_no_route(stcb, net, so_locked);
4481 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4483 return (EHOSTUNREACH);
4485 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4486 sctp_free_ifa(_lsrc);
4488 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4489 SCTP_RTALLOC(ro, vrf_id);
4491 (void)sa6_recoverscope(sin6);
4493 lsa6->sin6_port = inp->sctp_lport;
4495 if (ro->ro_rt == NULL) {
4497 * src addr selection failed to find a route
4498 * (or valid source addr), so we can't get
4501 sctp_handle_no_route(stcb, net, so_locked);
4502 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4504 return (EHOSTUNREACH);
4507 * XXX: sa6 may not have a valid sin6_scope_id in
4508 * the non-SCOPEDROUTING case.
4510 bzero(&lsa6_storage, sizeof(lsa6_storage));
4511 lsa6_storage.sin6_family = AF_INET6;
4512 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4513 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4514 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4515 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4520 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4521 lsa6_storage.sin6_port = inp->sctp_lport;
4522 lsa6 = &lsa6_storage;
4523 ip6h->ip6_src = lsa6->sin6_addr;
4526 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4527 sctp_handle_no_route(stcb, net, so_locked);
4528 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4530 return (EHOSTUNREACH);
4532 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4533 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4534 udp->uh_dport = port;
4535 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4537 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4539 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4542 sctphdr->src_port = src_port;
4543 sctphdr->dest_port = dest_port;
4544 sctphdr->v_tag = v_tag;
4545 sctphdr->checksum = 0;
4548 * We set the hop limit now since there is a good
4549 * chance that our ro pointer is now filled
4551 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4552 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4555 /* Copy to be sure something bad is not happening */
4556 sin6->sin6_addr = ip6h->ip6_dst;
4557 lsa6->sin6_addr = ip6h->ip6_src;
4560 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4562 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4563 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4564 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4566 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4568 * preserve the port and scope for link
4571 prev_scope = sin6->sin6_scope_id;
4572 prev_port = sin6->sin6_port;
4574 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4575 /* failed to prepend data, give up */
4577 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4580 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4582 #if defined(SCTP_WITH_NO_CSUM)
4583 SCTP_STAT_INCR(sctps_sendnocrc);
4585 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4586 SCTP_STAT_INCR(sctps_sendswcrc);
4588 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4589 udp->uh_sum = 0xffff;
4592 #if defined(SCTP_WITH_NO_CSUM)
4593 SCTP_STAT_INCR(sctps_sendnocrc);
4595 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4596 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4597 SCTP_STAT_INCR(sctps_sendhwcrc);
4600 /* send it out. table id is taken from stcb */
4601 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4602 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4603 so = SCTP_INP_SO(inp);
4604 SCTP_SOCKET_UNLOCK(so, 0);
4607 #ifdef SCTP_PACKET_LOGGING
4608 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4609 sctp_packet_log(o_pak);
4611 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4612 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4613 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4614 atomic_add_int(&stcb->asoc.refcnt, 1);
4615 SCTP_TCB_UNLOCK(stcb);
4616 SCTP_SOCKET_LOCK(so, 0);
4617 SCTP_TCB_LOCK(stcb);
4618 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4622 /* for link local this must be done */
4623 sin6->sin6_scope_id = prev_scope;
4624 sin6->sin6_port = prev_port;
4626 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4627 SCTP_STAT_INCR(sctps_sendpackets);
4628 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4630 SCTP_STAT_INCR(sctps_senderrors);
4633 /* Now if we had a temp route free it */
4637 * PMTU check versus smallest asoc MTU goes
4640 if (ro->ro_rt == NULL) {
4641 /* Route was freed */
4642 if (net->ro._s_addr &&
4643 net->src_addr_selected) {
4644 sctp_free_ifa(net->ro._s_addr);
4645 net->ro._s_addr = NULL;
4647 net->src_addr_selected = 0;
4649 if ((ro->ro_rt != NULL) &&
4650 (net->ro._s_addr)) {
4653 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4655 (stcb->asoc.smallest_mtu > mtu)) {
4656 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4659 net->mtu -= sizeof(struct udphdr);
4663 if (ND_IFINFO(ifp)->linkmtu &&
4664 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4665 sctp_mtu_size_reset(inp,
4667 ND_IFINFO(ifp)->linkmtu);
4675 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4676 ((struct sockaddr *)to)->sa_family);
4678 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4685 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4686 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4691 struct mbuf *m, *m_last;
4692 struct sctp_nets *net;
4693 struct sctp_init_chunk *init;
4694 struct sctp_supported_addr_param *sup_addr;
4695 struct sctp_adaptation_layer_indication *ali;
4696 struct sctp_supported_chunk_types_param *pr_supported;
4697 struct sctp_paramhdr *ph;
4698 int cnt_inits_to = 0;
4700 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4702 /* INIT's always go to the primary (and usually ONLY address) */
4703 net = stcb->asoc.primary_destination;
4705 net = TAILQ_FIRST(&stcb->asoc.nets);
4710 /* we confirm any address we send an INIT to */
4711 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4712 (void)sctp_set_primary_addr(stcb, NULL, net);
4714 /* we confirm any address we send an INIT to */
4715 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4717 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4719 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4721 * special hook, if we are sending to link local it will not
4722 * show up in our private address count.
4724 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4728 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4729 /* This case should not happen */
4730 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4733 /* start the INIT timer */
4734 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4736 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4738 /* No memory, INIT timer will re-attempt. */
4739 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4742 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4744 /* Now lets put the chunk header in place */
4745 init = mtod(m, struct sctp_init_chunk *);
4746 /* now the chunk header */
4747 init->ch.chunk_type = SCTP_INITIATION;
4748 init->ch.chunk_flags = 0;
4749 /* fill in later from mbuf we build */
4750 init->ch.chunk_length = 0;
4751 /* place in my tag */
4752 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4753 /* set up some of the credits. */
4754 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4755 SCTP_MINIMAL_RWND));
4756 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4757 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4758 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4760 /* Adaptation layer indication parameter */
4761 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4762 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4763 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4764 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4765 ali->ph.param_length = htons(parameter_len);
4766 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4767 chunk_len += parameter_len;
4770 if (stcb->asoc.ecn_supported == 1) {
4771 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4772 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4773 ph->param_type = htons(SCTP_ECN_CAPABLE);
4774 ph->param_length = htons(parameter_len);
4775 chunk_len += parameter_len;
4777 /* PR-SCTP supported parameter */
4778 if (stcb->asoc.prsctp_supported == 1) {
4779 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4780 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4781 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4782 ph->param_length = htons(parameter_len);
4783 chunk_len += parameter_len;
4785 /* Add NAT friendly parameter. */
4786 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4787 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4788 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4789 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4790 ph->param_length = htons(parameter_len);
4791 chunk_len += parameter_len;
4793 /* And now tell the peer which extensions we support */
4795 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4796 if (stcb->asoc.prsctp_supported == 1) {
4797 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4799 if (stcb->asoc.auth_supported == 1) {
4800 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4802 if (stcb->asoc.asconf_supported == 1) {
4803 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4804 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4806 if (stcb->asoc.reconfig_supported == 1) {
4807 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4809 if (stcb->asoc.nrsack_supported == 1) {
4810 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4812 if (stcb->asoc.pktdrop_supported == 1) {
4813 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4816 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4817 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4818 pr_supported->ph.param_length = htons(parameter_len);
4819 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4820 chunk_len += parameter_len;
4822 /* add authentication parameters */
4823 if (stcb->asoc.auth_supported) {
4824 /* attach RANDOM parameter, if available */
4825 if (stcb->asoc.authinfo.random != NULL) {
4826 struct sctp_auth_random *randp;
4828 if (padding_len > 0) {
4829 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4830 chunk_len += padding_len;
4833 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4834 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4835 /* random key already contains the header */
4836 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4837 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4838 chunk_len += parameter_len;
4840 /* add HMAC_ALGO parameter */
4841 if (stcb->asoc.local_hmacs != NULL) {
4842 struct sctp_auth_hmac_algo *hmacs;
4844 if (padding_len > 0) {
4845 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4846 chunk_len += padding_len;
4849 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4850 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4851 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4852 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4853 hmacs->ph.param_length = htons(parameter_len);
4854 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4855 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4856 chunk_len += parameter_len;
4858 /* add CHUNKS parameter */
4859 if (stcb->asoc.local_auth_chunks != NULL) {
4860 struct sctp_auth_chunk_list *chunks;
4862 if (padding_len > 0) {
4863 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4864 chunk_len += padding_len;
4867 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4868 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4869 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4870 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4871 chunks->ph.param_length = htons(parameter_len);
4872 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4873 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4874 chunk_len += parameter_len;
4877 /* now any cookie time extensions */
4878 if (stcb->asoc.cookie_preserve_req) {
4879 struct sctp_cookie_perserve_param *cookie_preserve;
4881 if (padding_len > 0) {
4882 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4883 chunk_len += padding_len;
4886 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4887 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4888 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4889 cookie_preserve->ph.param_length = htons(parameter_len);
4890 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4891 stcb->asoc.cookie_preserve_req = 0;
4892 chunk_len += parameter_len;
4894 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4897 if (padding_len > 0) {
4898 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4899 chunk_len += padding_len;
4902 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4903 if (stcb->asoc.scope.ipv4_addr_legal) {
4904 parameter_len += (uint16_t) sizeof(uint16_t);
4906 if (stcb->asoc.scope.ipv6_addr_legal) {
4907 parameter_len += (uint16_t) sizeof(uint16_t);
4909 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4910 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4911 sup_addr->ph.param_length = htons(parameter_len);
4913 if (stcb->asoc.scope.ipv4_addr_legal) {
4914 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4916 if (stcb->asoc.scope.ipv6_addr_legal) {
4917 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4919 padding_len = 4 - 2 * i;
4920 chunk_len += parameter_len;
4922 SCTP_BUF_LEN(m) = chunk_len;
4923 /* now the addresses */
4925 * To optimize this we could put the scoping stuff into a structure
4926 * and remove the individual uint8's from the assoc structure. Then
4927 * we could just sifa in the address within the stcb. But for now
4928 * this is a quick hack to get the address stuff teased apart.
4930 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4932 &padding_len, &chunk_len);
4934 init->ch.chunk_length = htons(chunk_len);
4935 if (padding_len > 0) {
4936 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4941 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4942 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4943 (struct sockaddr *)&net->ro._l_addr,
4944 m, 0, NULL, 0, 0, 0, 0,
4945 inp->sctp_lport, stcb->rport, htonl(0),
4949 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4950 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4951 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4955 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4956 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4959 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4960 * being equal to the beginning of the params i.e. (iphlen +
4961 * sizeof(struct sctp_init_msg) parse through the parameters to the
4962 * end of the mbuf verifying that all parameters are known.
4964 * For unknown parameters build and return a mbuf with
4965 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4966 * processing this chunk stop, and set *abort_processing to 1.
4968 * By having param_offset be pre-set to where parameters begin it is
4969 * hoped that this routine may be reused in the future by new
4972 struct sctp_paramhdr *phdr, params;
4974 struct mbuf *mat, *op_err;
4975 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4976 int at, limit, pad_needed;
4977 uint16_t ptype, plen, padded_size;
4980 *abort_processing = 0;
4983 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4986 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4987 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4988 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4989 ptype = ntohs(phdr->param_type);
4990 plen = ntohs(phdr->param_length);
4991 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4992 /* wacked parameter */
4993 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4996 limit -= SCTP_SIZE32(plen);
4998 * All parameters for all chunks that we know/understand are
4999 * listed here. We process them other places and make
5000 * appropriate stop actions per the upper bits. However this
5001 * is the generic routine processor's can call to get back
5002 * an operr.. to either incorporate (init-ack) or send.
5004 padded_size = SCTP_SIZE32(plen);
5006 /* Param's with variable size */
5007 case SCTP_HEARTBEAT_INFO:
5008 case SCTP_STATE_COOKIE:
5009 case SCTP_UNRECOG_PARAM:
5010 case SCTP_ERROR_CAUSE_IND:
5014 /* Param's with variable size within a range */
5015 case SCTP_CHUNK_LIST:
5016 case SCTP_SUPPORTED_CHUNK_EXT:
5017 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5018 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5023 case SCTP_SUPPORTED_ADDRTYPE:
5024 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5025 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5031 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5032 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5037 case SCTP_SET_PRIM_ADDR:
5038 case SCTP_DEL_IP_ADDRESS:
5039 case SCTP_ADD_IP_ADDRESS:
5040 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5041 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5042 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5047 /* Param's with a fixed size */
5048 case SCTP_IPV4_ADDRESS:
5049 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5050 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5055 case SCTP_IPV6_ADDRESS:
5056 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5057 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5062 case SCTP_COOKIE_PRESERVE:
5063 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5064 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5069 case SCTP_HAS_NAT_SUPPORT:
5072 case SCTP_PRSCTP_SUPPORTED:
5073 if (padded_size != sizeof(struct sctp_paramhdr)) {
5074 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5079 case SCTP_ECN_CAPABLE:
5080 if (padded_size != sizeof(struct sctp_paramhdr)) {
5081 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5086 case SCTP_ULP_ADAPTATION:
5087 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5088 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5093 case SCTP_SUCCESS_REPORT:
5094 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5095 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5100 case SCTP_HOSTNAME_ADDRESS:
5102 /* We can NOT handle HOST NAME addresses!! */
5105 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5106 *abort_processing = 1;
5107 if (op_err == NULL) {
5108 /* Ok need to try to get a mbuf */
5110 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5112 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5115 l_len += sizeof(struct sctp_paramhdr);
5116 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5118 SCTP_BUF_LEN(op_err) = 0;
5120 * pre-reserve space for ip
5121 * and sctp header and
5125 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5130 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5134 /* If we have space */
5135 struct sctp_paramhdr s;
5138 uint32_t cpthis = 0;
5140 pad_needed = 4 - (err_at % 4);
5141 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5142 err_at += pad_needed;
5144 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5145 s.param_length = htons(sizeof(s) + plen);
5146 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5147 err_at += sizeof(s);
5148 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5150 sctp_m_freem(op_err);
5152 * we are out of memory but
5153 * we still need to have a
5154 * look at what to do (the
5155 * system is in trouble
5160 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5167 * we do not recognize the parameter figure out what
5170 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5171 if ((ptype & 0x4000) == 0x4000) {
5172 /* Report bit is set?? */
5173 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5174 if (op_err == NULL) {
5177 /* Ok need to try to get an mbuf */
5179 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5181 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5184 l_len += sizeof(struct sctp_paramhdr);
5185 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5187 SCTP_BUF_LEN(op_err) = 0;
5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5198 /* If we have space */
5199 struct sctp_paramhdr s;
5202 uint32_t cpthis = 0;
5204 pad_needed = 4 - (err_at % 4);
5205 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5206 err_at += pad_needed;
5208 s.param_type = htons(SCTP_UNRECOG_PARAM);
5209 s.param_length = htons(sizeof(s) + plen);
5210 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5211 err_at += sizeof(s);
5212 if (plen > sizeof(tempbuf)) {
5213 plen = sizeof(tempbuf);
5215 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5217 sctp_m_freem(op_err);
5219 * we are out of memory but
5220 * we still need to have a
5221 * look at what to do (the
5222 * system is in trouble
5226 goto more_processing;
5228 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5233 if ((ptype & 0x8000) == 0x0000) {
5234 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5237 /* skip this chunk and continue processing */
5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5239 at += SCTP_SIZE32(plen);
5244 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5249 *abort_processing = 1;
5250 if ((op_err == NULL) && phdr) {
5254 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5256 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5258 l_len += (2 * sizeof(struct sctp_paramhdr));
5259 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5261 SCTP_BUF_LEN(op_err) = 0;
5263 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5265 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5271 if ((op_err) && phdr) {
5272 struct sctp_paramhdr s;
5275 uint32_t cpthis = 0;
5277 pad_needed = 4 - (err_at % 4);
5278 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5279 err_at += pad_needed;
5281 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5282 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5283 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5284 err_at += sizeof(s);
5285 /* Only copy back the p-hdr that caused the issue */
5286 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5292 sctp_are_there_new_addresses(struct sctp_association *asoc,
5293 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5296 * Given a INIT packet, look through the packet to verify that there
5297 * are NO new addresses. As we go through the parameters add reports
5298 * of any un-understood parameters that require an error. Also we
5299 * must return (1) to drop the packet if we see a un-understood
5300 * parameter that tells us to drop the chunk.
5302 struct sockaddr *sa_touse;
5303 struct sockaddr *sa;
5304 struct sctp_paramhdr *phdr, params;
5305 uint16_t ptype, plen;
5307 struct sctp_nets *net;
5310 struct sockaddr_in sin4, *sa4;
5314 struct sockaddr_in6 sin6, *sa6;
5319 memset(&sin4, 0, sizeof(sin4));
5320 sin4.sin_family = AF_INET;
5321 sin4.sin_len = sizeof(sin4);
5324 memset(&sin6, 0, sizeof(sin6));
5325 sin6.sin6_family = AF_INET6;
5326 sin6.sin6_len = sizeof(sin6);
5328 /* First what about the src address of the pkt ? */
5330 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5331 sa = (struct sockaddr *)&net->ro._l_addr;
5332 if (sa->sa_family == src->sa_family) {
5334 if (sa->sa_family == AF_INET) {
5335 struct sockaddr_in *src4;
5337 sa4 = (struct sockaddr_in *)sa;
5338 src4 = (struct sockaddr_in *)src;
5339 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5346 if (sa->sa_family == AF_INET6) {
5347 struct sockaddr_in6 *src6;
5349 sa6 = (struct sockaddr_in6 *)sa;
5350 src6 = (struct sockaddr_in6 *)src;
5351 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5360 /* New address added! no need to look futher. */
5363 /* Ok so far lets munge through the rest of the packet */
5364 offset += sizeof(struct sctp_init_chunk);
5365 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5368 ptype = ntohs(phdr->param_type);
5369 plen = ntohs(phdr->param_length);
5372 case SCTP_IPV4_ADDRESS:
5374 struct sctp_ipv4addr_param *p4, p4_buf;
5376 phdr = sctp_get_next_param(in_initpkt, offset,
5377 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5378 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5382 p4 = (struct sctp_ipv4addr_param *)phdr;
5383 sin4.sin_addr.s_addr = p4->addr;
5384 sa_touse = (struct sockaddr *)&sin4;
5389 case SCTP_IPV6_ADDRESS:
5391 struct sctp_ipv6addr_param *p6, p6_buf;
5393 phdr = sctp_get_next_param(in_initpkt, offset,
5394 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5395 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5399 p6 = (struct sctp_ipv6addr_param *)phdr;
5400 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5402 sa_touse = (struct sockaddr *)&sin6;
5411 /* ok, sa_touse points to one to check */
5413 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5414 sa = (struct sockaddr *)&net->ro._l_addr;
5415 if (sa->sa_family != sa_touse->sa_family) {
5419 if (sa->sa_family == AF_INET) {
5420 sa4 = (struct sockaddr_in *)sa;
5421 if (sa4->sin_addr.s_addr ==
5422 sin4.sin_addr.s_addr) {
5429 if (sa->sa_family == AF_INET6) {
5430 sa6 = (struct sockaddr_in6 *)sa;
5431 if (SCTP6_ARE_ADDR_EQUAL(
5440 /* New addr added! no need to look further */
5444 offset += SCTP_SIZE32(plen);
5445 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5451 * Given a MBUF chain that was sent into us containing an INIT. Build a
5452 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5453 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5454 * message (i.e. the struct sctp_init_msg).
5457 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5458 struct mbuf *init_pkt, int iphlen, int offset,
5459 struct sockaddr *src, struct sockaddr *dst,
5460 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5461 uint8_t mflowtype, uint32_t mflowid,
5462 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5464 struct sctp_association *asoc;
5465 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5466 struct sctp_init_ack_chunk *initack;
5467 struct sctp_adaptation_layer_indication *ali;
5468 struct sctp_supported_chunk_types_param *pr_supported;
5469 struct sctp_paramhdr *ph;
5470 union sctp_sockstore *over_addr;
5471 struct sctp_scoping scp;
5474 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5475 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5476 struct sockaddr_in *sin;
5480 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5481 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5482 struct sockaddr_in6 *sin6;
5485 struct sockaddr *to;
5486 struct sctp_state_cookie stc;
5487 struct sctp_nets *net = NULL;
5488 uint8_t *signature = NULL;
5489 int cnt_inits_to = 0;
5490 uint16_t his_limit, i_want;
5492 int nat_friendly = 0;
5494 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5501 if ((asoc != NULL) &&
5502 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5503 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5504 /* new addresses, out of here in non-cookie-wait states */
5506 * Send a ABORT, we don't add the new address error clause
5507 * though we even set the T bit and copy in the 0 tag.. this
5508 * looks no different than if no listener was present.
5510 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5512 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5518 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5519 (offset + sizeof(struct sctp_init_chunk)),
5520 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5523 if (op_err == NULL) {
5524 char msg[SCTP_DIAG_INFO_LEN];
5526 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5527 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5530 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5531 init_chk->init.initiate_tag, op_err,
5536 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5538 /* No memory, INIT timer will re-attempt. */
5540 sctp_m_freem(op_err);
5543 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5547 * We might not overwrite the identification[] completely and on
5548 * some platforms time_entered will contain some padding. Therefore
5549 * zero out the cookie to avoid putting uninitialized memory on the
5552 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5554 /* the time I built cookie */
5555 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5557 /* populate any tie tags */
5559 /* unlock before tag selections */
5560 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5561 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5562 stc.cookie_life = asoc->cookie_life;
5563 net = asoc->primary_destination;
5565 stc.tie_tag_my_vtag = 0;
5566 stc.tie_tag_peer_vtag = 0;
5567 /* life I will award this cookie */
5568 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5571 /* copy in the ports for later check */
5572 stc.myport = sh->dest_port;
5573 stc.peerport = sh->src_port;
5576 * If we wanted to honor cookie life extentions, we would add to
5577 * stc.cookie_life. For now we should NOT honor any extension
5579 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5580 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5581 stc.ipv6_addr_legal = 1;
5582 if (SCTP_IPV6_V6ONLY(inp)) {
5583 stc.ipv4_addr_legal = 0;
5585 stc.ipv4_addr_legal = 1;
5588 stc.ipv6_addr_legal = 0;
5589 stc.ipv4_addr_legal = 1;
5591 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5598 switch (dst->sa_family) {
5602 /* lookup address */
5603 stc.address[0] = src4->sin_addr.s_addr;
5607 stc.addr_type = SCTP_IPV4_ADDRESS;
5608 /* local from address */
5609 stc.laddress[0] = dst4->sin_addr.s_addr;
5610 stc.laddress[1] = 0;
5611 stc.laddress[2] = 0;
5612 stc.laddress[3] = 0;
5613 stc.laddr_type = SCTP_IPV4_ADDRESS;
5614 /* scope_id is only for v6 */
5616 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5617 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5622 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5623 /* Must use the address in this case */
5624 if (sctp_is_address_on_local_host(src, vrf_id)) {
5625 stc.loopback_scope = 1;
5628 stc.local_scope = 0;
5636 stc.addr_type = SCTP_IPV6_ADDRESS;
5637 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5638 stc.scope_id = in6_getscope(&src6->sin6_addr);
5639 if (sctp_is_address_on_local_host(src, vrf_id)) {
5640 stc.loopback_scope = 1;
5641 stc.local_scope = 0;
5644 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5646 * If the new destination is a
5647 * LINK_LOCAL we must have common
5648 * both site and local scope. Don't
5649 * set local scope though since we
5650 * must depend on the source to be
5651 * added implicitly. We cannot
5652 * assure just because we share one
5653 * link that all links are common.
5655 stc.local_scope = 0;
5659 * we start counting for the private
5660 * address stuff at 1. since the
5661 * link local we source from won't
5662 * show up in our scoped count.
5666 * pull out the scope_id from
5669 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5671 * If the new destination is
5672 * SITE_LOCAL then we must have site
5677 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5678 stc.laddr_type = SCTP_IPV6_ADDRESS;
5688 /* set the scope per the existing tcb */
5691 struct sctp_nets *lnet;
5695 stc.loopback_scope = asoc->scope.loopback_scope;
5696 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5697 stc.site_scope = asoc->scope.site_scope;
5698 stc.local_scope = asoc->scope.local_scope;
5700 /* Why do we not consider IPv4 LL addresses? */
5701 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5702 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5703 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5705 * if we have a LL address, start
5713 /* use the net pointer */
5714 to = (struct sockaddr *)&net->ro._l_addr;
5715 switch (to->sa_family) {
5718 sin = (struct sockaddr_in *)to;
5719 stc.address[0] = sin->sin_addr.s_addr;
5723 stc.addr_type = SCTP_IPV4_ADDRESS;
5724 if (net->src_addr_selected == 0) {
5726 * strange case here, the INIT should have
5727 * did the selection.
5729 net->ro._s_addr = sctp_source_address_selection(inp,
5730 stcb, (sctp_route_t *) & net->ro,
5732 if (net->ro._s_addr == NULL)
5735 net->src_addr_selected = 1;
5738 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5739 stc.laddress[1] = 0;
5740 stc.laddress[2] = 0;
5741 stc.laddress[3] = 0;
5742 stc.laddr_type = SCTP_IPV4_ADDRESS;
5743 /* scope_id is only for v6 */
5749 sin6 = (struct sockaddr_in6 *)to;
5750 memcpy(&stc.address, &sin6->sin6_addr,
5751 sizeof(struct in6_addr));
5752 stc.addr_type = SCTP_IPV6_ADDRESS;
5753 stc.scope_id = sin6->sin6_scope_id;
5754 if (net->src_addr_selected == 0) {
5756 * strange case here, the INIT should have
5757 * done the selection.
5759 net->ro._s_addr = sctp_source_address_selection(inp,
5760 stcb, (sctp_route_t *) & net->ro,
5762 if (net->ro._s_addr == NULL)
5765 net->src_addr_selected = 1;
5767 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5768 sizeof(struct in6_addr));
5769 stc.laddr_type = SCTP_IPV6_ADDRESS;
5774 /* Now lets put the SCTP header in place */
5775 initack = mtod(m, struct sctp_init_ack_chunk *);
5776 /* Save it off for quick ref */
5777 stc.peers_vtag = init_chk->init.initiate_tag;
5779 memcpy(stc.identification, SCTP_VERSION_STRING,
5780 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5781 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5782 /* now the chunk header */
5783 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5784 initack->ch.chunk_flags = 0;
5785 /* fill in later from mbuf we build */
5786 initack->ch.chunk_length = 0;
5787 /* place in my tag */
5788 if ((asoc != NULL) &&
5789 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5790 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5791 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5792 /* re-use the v-tags and init-seq here */
5793 initack->init.initiate_tag = htonl(asoc->my_vtag);
5794 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5796 uint32_t vtag, itsn;
5798 if (hold_inp_lock) {
5799 SCTP_INP_INCR_REF(inp);
5800 SCTP_INP_RUNLOCK(inp);
5803 atomic_add_int(&asoc->refcnt, 1);
5804 SCTP_TCB_UNLOCK(stcb);
5806 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5807 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5809 * Got a duplicate vtag on some guy behind a
5810 * nat make sure we don't use it.
5814 initack->init.initiate_tag = htonl(vtag);
5815 /* get a TSN to use too */
5816 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5817 initack->init.initial_tsn = htonl(itsn);
5818 SCTP_TCB_LOCK(stcb);
5819 atomic_add_int(&asoc->refcnt, -1);
5821 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5822 initack->init.initiate_tag = htonl(vtag);
5823 /* get a TSN to use too */
5824 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5826 if (hold_inp_lock) {
5827 SCTP_INP_RLOCK(inp);
5828 SCTP_INP_DECR_REF(inp);
5831 /* save away my tag to */
5832 stc.my_vtag = initack->init.initiate_tag;
5834 /* set up some of the credits. */
5835 so = inp->sctp_socket;
5837 /* memory problem */
5841 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5843 /* set what I want */
5844 his_limit = ntohs(init_chk->init.num_inbound_streams);
5845 /* choose what I want */
5847 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5848 i_want = asoc->streamoutcnt;
5850 i_want = inp->sctp_ep.pre_open_stream_count;
5853 i_want = inp->sctp_ep.pre_open_stream_count;
5855 if (his_limit < i_want) {
5856 /* I Want more :< */
5857 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5859 /* I can have what I want :> */
5860 initack->init.num_outbound_streams = htons(i_want);
5862 /* tell him his limit. */
5863 initack->init.num_inbound_streams =
5864 htons(inp->sctp_ep.max_open_streams_intome);
5866 /* adaptation layer indication parameter */
5867 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5868 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5869 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5870 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5871 ali->ph.param_length = htons(parameter_len);
5872 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5873 chunk_len += parameter_len;
5876 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5877 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5878 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5879 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5880 ph->param_type = htons(SCTP_ECN_CAPABLE);
5881 ph->param_length = htons(parameter_len);
5882 chunk_len += parameter_len;
5884 /* PR-SCTP supported parameter */
5885 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5886 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5887 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5888 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5889 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5890 ph->param_length = htons(parameter_len);
5891 chunk_len += parameter_len;
5893 /* Add NAT friendly parameter */
5895 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5896 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5897 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5898 ph->param_length = htons(parameter_len);
5899 chunk_len += parameter_len;
5901 /* And now tell the peer which extensions we support */
5903 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5904 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5905 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5906 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5908 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5909 ((asoc == NULL) && (inp->auth_supported == 1))) {
5910 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5912 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5913 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5914 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5915 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5917 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5918 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5919 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5921 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5922 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5923 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5925 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5926 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5927 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5930 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5931 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5932 pr_supported->ph.param_length = htons(parameter_len);
5933 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5934 chunk_len += parameter_len;
5936 /* add authentication parameters */
5937 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5938 ((asoc == NULL) && (inp->auth_supported == 1))) {
5939 struct sctp_auth_random *randp;
5940 struct sctp_auth_hmac_algo *hmacs;
5941 struct sctp_auth_chunk_list *chunks;
5943 if (padding_len > 0) {
5944 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5945 chunk_len += padding_len;
5948 /* generate and add RANDOM parameter */
5949 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5950 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5951 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5952 randp->ph.param_type = htons(SCTP_RANDOM);
5953 randp->ph.param_length = htons(parameter_len);
5954 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5955 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5956 chunk_len += parameter_len;
5958 if (padding_len > 0) {
5959 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5960 chunk_len += padding_len;
5963 /* add HMAC_ALGO parameter */
5964 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5965 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
5966 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5967 (uint8_t *) hmacs->hmac_ids);
5968 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5969 hmacs->ph.param_length = htons(parameter_len);
5970 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5971 chunk_len += parameter_len;
5973 if (padding_len > 0) {
5974 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5975 chunk_len += padding_len;
5978 /* add CHUNKS parameter */
5979 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5980 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
5981 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5982 chunks->chunk_types);
5983 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5984 chunks->ph.param_length = htons(parameter_len);
5985 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5986 chunk_len += parameter_len;
5988 SCTP_BUF_LEN(m) = chunk_len;
5990 /* now the addresses */
5992 * To optimize this we could put the scoping stuff into a structure
5993 * and remove the individual uint8's from the stc structure. Then we
5994 * could just sifa in the address within the stc.. but for now this
5995 * is a quick hack to get the address stuff teased apart.
5997 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5998 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5999 scp.loopback_scope = stc.loopback_scope;
6000 scp.ipv4_local_scope = stc.ipv4_scope;
6001 scp.local_scope = stc.local_scope;
6002 scp.site_scope = stc.site_scope;
6003 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6005 &padding_len, &chunk_len);
6006 /* padding_len can only be positive, if no addresses have been added */
6007 if (padding_len > 0) {
6008 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6009 chunk_len += padding_len;
6010 SCTP_BUF_LEN(m) += padding_len;
6013 /* tack on the operational error if present */
6016 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6017 parameter_len += SCTP_BUF_LEN(m_tmp);
6019 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6020 SCTP_BUF_NEXT(m_last) = op_err;
6021 while (SCTP_BUF_NEXT(m_last) != NULL) {
6022 m_last = SCTP_BUF_NEXT(m_last);
6024 chunk_len += parameter_len;
6026 if (padding_len > 0) {
6027 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6028 if (m_last == NULL) {
6029 /* Houston we have a problem, no space */
6033 chunk_len += padding_len;
6036 /* Now we must build a cookie */
6037 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6038 if (m_cookie == NULL) {
6039 /* memory problem */
6043 /* Now append the cookie to the end and update the space/size */
6044 SCTP_BUF_NEXT(m_last) = m_cookie;
6046 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6047 parameter_len += SCTP_BUF_LEN(m_tmp);
6048 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6052 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6053 chunk_len += parameter_len;
6056 * Place in the size, but we don't include the last pad (if any) in
6059 initack->ch.chunk_length = htons(chunk_len);
6062 * Time to sign the cookie, we don't sign over the cookie signature
6063 * though thus we set trailer.
6065 (void)sctp_hmac_m(SCTP_HMAC,
6066 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6067 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6068 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6070 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6071 * here since the timer will drive a retranmission.
6073 if (padding_len > 0) {
6074 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6079 if (stc.loopback_scope) {
6080 over_addr = (union sctp_sockstore *)dst;
6085 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6087 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6090 SCTP_SO_NOT_LOCKED);
6091 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6096 sctp_prune_prsctp(struct sctp_tcb *stcb,
6097 struct sctp_association *asoc,
6098 struct sctp_sndrcvinfo *srcv,
6102 struct sctp_tmit_chunk *chk, *nchk;
6104 SCTP_TCB_LOCK_ASSERT(stcb);
6105 if ((asoc->prsctp_supported) &&
6106 (asoc->sent_queue_cnt_removeable > 0)) {
6107 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6109 * Look for chunks marked with the PR_SCTP flag AND
6110 * the buffer space flag. If the one being sent is
6111 * equal or greater priority then purge the old one
6112 * and free some space.
6114 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6116 * This one is PR-SCTP AND buffer space
6119 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6121 * Lower numbers equates to higher
6122 * priority so if the one we are
6123 * looking at has a larger or equal
6124 * priority we want to drop the data
6125 * and NOT retransmit it.
6129 * We release the book_size
6130 * if the mbuf is here
6135 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6139 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6142 freed_spc += ret_spc;
6143 if (freed_spc >= dataout) {
6146 } /* if chunk was present */
6147 } /* if of sufficent priority */
6148 } /* if chunk has enabled */
6149 } /* tailqforeach */
6151 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6152 /* Here we must move to the sent queue and mark */
6153 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6154 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6157 * We release the book_size
6158 * if the mbuf is here
6162 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6165 freed_spc += ret_spc;
6166 if (freed_spc >= dataout) {
6169 } /* end if chk->data */
6170 } /* end if right class */
6171 } /* end if chk pr-sctp */
6172 } /* tailqforeachsafe (chk) */
6173 } /* if enabled in asoc */
6177 sctp_get_frag_point(struct sctp_tcb *stcb,
6178 struct sctp_association *asoc)
6183 * For endpoints that have both v6 and v4 addresses we must reserve
6184 * room for the ipv6 header, for those that are only dealing with V4
6185 * we use a larger frag point.
6187 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6188 ovh = SCTP_MED_OVERHEAD;
6190 ovh = SCTP_MED_V4_OVERHEAD;
6193 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6194 siz = asoc->smallest_mtu - ovh;
6196 siz = (stcb->asoc.sctp_frag_point - ovh);
6198 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6200 /* A data chunk MUST fit in a cluster */
6201 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6204 /* adjust for an AUTH chunk if DATA requires auth */
6205 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6206 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6209 /* make it an even word boundary please */
6216 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6219 * We assume that the user wants PR_SCTP_TTL if the user provides a
6220 * positive lifetime but does not specify any PR_SCTP policy.
6222 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6223 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6224 } else if (sp->timetolive > 0) {
6225 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6226 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6230 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6231 case CHUNK_FLAGS_PR_SCTP_BUF:
6233 * Time to live is a priority stored in tv_sec when doing
6234 * the buffer drop thing.
6236 sp->ts.tv_sec = sp->timetolive;
6239 case CHUNK_FLAGS_PR_SCTP_TTL:
6243 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6244 tv.tv_sec = sp->timetolive / 1000;
6245 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6247 * TODO sctp_constants.h needs alternative time
6248 * macros when _KERNEL is undefined.
6250 timevaladd(&sp->ts, &tv);
6253 case CHUNK_FLAGS_PR_SCTP_RTX:
6255 * Time to live is a the number or retransmissions stored in
6258 sp->ts.tv_sec = sp->timetolive;
6262 SCTPDBG(SCTP_DEBUG_USRREQ1,
6263 "Unknown PR_SCTP policy %u.\n",
6264 PR_SCTP_POLICY(sp->sinfo_flags));
6270 sctp_msg_append(struct sctp_tcb *stcb,
6271 struct sctp_nets *net,
6273 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6277 struct sctp_stream_queue_pending *sp = NULL;
6278 struct sctp_stream_out *strm;
6281 * Given an mbuf chain, put it into the association send queue and
6282 * place it on the wheel
6284 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6285 /* Invalid stream number */
6286 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6290 if ((stcb->asoc.stream_locked) &&
6291 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6292 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6296 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6297 /* Now can we send this? */
6298 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6299 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6300 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6301 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6302 /* got data while shutting down */
6303 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6307 sctp_alloc_a_strmoq(stcb, sp);
6309 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6313 sp->sinfo_flags = srcv->sinfo_flags;
6314 sp->timetolive = srcv->sinfo_timetolive;
6315 sp->ppid = srcv->sinfo_ppid;
6316 sp->context = srcv->sinfo_context;
6317 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6319 atomic_add_int(&sp->net->ref_count, 1);
6323 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6324 sp->stream = srcv->sinfo_stream;
6325 sp->msg_is_complete = 1;
6326 sp->sender_all_done = 1;
6329 sp->tail_mbuf = NULL;
6330 sctp_set_prsctp_policy(sp);
6332 * We could in theory (for sendall) sifa the length in, but we would
6333 * still have to hunt through the chain since we need to setup the
6337 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6338 if (SCTP_BUF_NEXT(at) == NULL)
6340 sp->length += SCTP_BUF_LEN(at);
6342 if (srcv->sinfo_keynumber_valid) {
6343 sp->auth_keyid = srcv->sinfo_keynumber;
6345 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6347 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6348 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6349 sp->holds_key_ref = 1;
6351 if (hold_stcb_lock == 0) {
6352 SCTP_TCB_SEND_LOCK(stcb);
6354 sctp_snd_sb_alloc(stcb, sp->length);
6355 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6356 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6357 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6359 if (hold_stcb_lock == 0) {
6360 SCTP_TCB_SEND_UNLOCK(stcb);
6370 static struct mbuf *
6371 sctp_copy_mbufchain(struct mbuf *clonechain,
6372 struct mbuf *outchain,
6373 struct mbuf **endofchain,
6376 uint8_t copy_by_ref)
6379 struct mbuf *appendchain;
6383 if (endofchain == NULL) {
6387 sctp_m_freem(outchain);
6390 if (can_take_mbuf) {
6391 appendchain = clonechain;
6394 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6396 /* Its not in a cluster */
6397 if (*endofchain == NULL) {
6398 /* lets get a mbuf cluster */
6399 if (outchain == NULL) {
6400 /* This is the general case */
6402 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6403 if (outchain == NULL) {
6406 SCTP_BUF_LEN(outchain) = 0;
6407 *endofchain = outchain;
6408 /* get the prepend space */
6409 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6412 * We really should not get a NULL
6418 if (SCTP_BUF_NEXT(m) == NULL) {
6422 m = SCTP_BUF_NEXT(m);
6425 if (*endofchain == NULL) {
6427 * huh, TSNH XXX maybe we
6430 sctp_m_freem(outchain);
6434 /* get the new end of length */
6435 len = M_TRAILINGSPACE(*endofchain);
6437 /* how much is left at the end? */
6438 len = M_TRAILINGSPACE(*endofchain);
6440 /* Find the end of the data, for appending */
6441 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6443 /* Now lets copy it out */
6444 if (len >= sizeofcpy) {
6445 /* It all fits, copy it in */
6446 m_copydata(clonechain, 0, sizeofcpy, cp);
6447 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6449 /* fill up the end of the chain */
6451 m_copydata(clonechain, 0, len, cp);
6452 SCTP_BUF_LEN((*endofchain)) += len;
6453 /* now we need another one */
6456 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6461 SCTP_BUF_NEXT((*endofchain)) = m;
6463 cp = mtod((*endofchain), caddr_t);
6464 m_copydata(clonechain, len, sizeofcpy, cp);
6465 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6469 /* copy the old fashion way */
6470 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6471 #ifdef SCTP_MBUF_LOGGING
6472 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6473 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6478 if (appendchain == NULL) {
6481 sctp_m_freem(outchain);
6485 /* tack on to the end */
6486 if (*endofchain != NULL) {
6487 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6491 if (SCTP_BUF_NEXT(m) == NULL) {
6492 SCTP_BUF_NEXT(m) = appendchain;
6495 m = SCTP_BUF_NEXT(m);
6499 * save off the end and update the end-chain postion
6503 if (SCTP_BUF_NEXT(m) == NULL) {
6507 m = SCTP_BUF_NEXT(m);
6511 /* save off the end and update the end-chain postion */
6514 if (SCTP_BUF_NEXT(m) == NULL) {
6518 m = SCTP_BUF_NEXT(m);
6520 return (appendchain);
6525 sctp_med_chunk_output(struct sctp_inpcb *inp,
6526 struct sctp_tcb *stcb,
6527 struct sctp_association *asoc,
6530 int control_only, int from_where,
6531 struct timeval *now, int *now_filled, int frag_point, int so_locked
6532 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6538 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6539 uint32_t val SCTP_UNUSED)
6541 struct sctp_copy_all *ca;
6544 int added_control = 0;
6545 int un_sent, do_chunk_output = 1;
6546 struct sctp_association *asoc;
6547 struct sctp_nets *net;
6549 ca = (struct sctp_copy_all *)ptr;
6550 if (ca->m == NULL) {
6553 if (ca->inp != inp) {
6557 if (ca->sndlen > 0) {
6558 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6560 /* can't copy so we are done */
6564 #ifdef SCTP_MBUF_LOGGING
6565 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6566 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6572 SCTP_TCB_LOCK_ASSERT(stcb);
6573 if (stcb->asoc.alternate) {
6574 net = stcb->asoc.alternate;
6576 net = stcb->asoc.primary_destination;
6578 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6579 /* Abort this assoc with m as the user defined reason */
6581 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6583 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6584 0, M_NOWAIT, 1, MT_DATA);
6585 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6588 struct sctp_paramhdr *ph;
6590 ph = mtod(m, struct sctp_paramhdr *);
6591 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6592 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6595 * We add one here to keep the assoc from dis-appearing on
6598 atomic_add_int(&stcb->asoc.refcnt, 1);
6599 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6601 * sctp_abort_an_association calls sctp_free_asoc() free
6602 * association will NOT free it since we incremented the
6603 * refcnt .. we do this to prevent it being freed and things
6604 * getting tricky since we could end up (from free_asoc)
6605 * calling inpcb_free which would get a recursive lock call
6606 * to the iterator lock.. But as a consequence of that the
6607 * stcb will return to us un-locked.. since free_asoc
6608 * returns with either no TCB or the TCB unlocked, we must
6609 * relock.. to unlock in the iterator timer :-0
6611 SCTP_TCB_LOCK(stcb);
6612 atomic_add_int(&stcb->asoc.refcnt, -1);
6613 goto no_chunk_output;
6616 ret = sctp_msg_append(stcb, net, m,
6620 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6621 /* shutdown this assoc */
6624 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6626 if (TAILQ_EMPTY(&asoc->send_queue) &&
6627 TAILQ_EMPTY(&asoc->sent_queue) &&
6629 if (asoc->locked_on_sending) {
6633 * there is nothing queued to send, so I'm
6636 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6637 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6638 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6640 * only send SHUTDOWN the first time
6643 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6644 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6646 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6647 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6648 sctp_stop_timers_for_shutdown(stcb);
6649 sctp_send_shutdown(stcb, net);
6650 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6652 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6653 asoc->primary_destination);
6655 do_chunk_output = 0;
6659 * we still got (or just got) data to send,
6660 * so set SHUTDOWN_PENDING
6663 * XXX sockets draft says that SCTP_EOF
6664 * should be sent with no data. currently,
6665 * we will allow user data to be sent first
6666 * and move to SHUTDOWN-PENDING
6668 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6669 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6670 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6671 if (asoc->locked_on_sending) {
6673 * Locked to send out the
6676 struct sctp_stream_queue_pending *sp;
6678 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6680 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6681 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6684 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6685 if (TAILQ_EMPTY(&asoc->send_queue) &&
6686 TAILQ_EMPTY(&asoc->sent_queue) &&
6687 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6689 atomic_add_int(&stcb->asoc.refcnt, 1);
6690 sctp_abort_an_association(stcb->sctp_ep, stcb,
6691 NULL, SCTP_SO_NOT_LOCKED);
6692 atomic_add_int(&stcb->asoc.refcnt, -1);
6693 goto no_chunk_output;
6695 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6696 asoc->primary_destination);
6702 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6703 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6705 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6706 (stcb->asoc.total_flight > 0) &&
6707 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6708 do_chunk_output = 0;
6710 if (do_chunk_output)
6711 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6712 else if (added_control) {
6713 int num_out, reason, now_filled = 0;
6717 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6718 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6719 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6730 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6732 struct sctp_copy_all *ca;
6734 ca = (struct sctp_copy_all *)ptr;
6736 * Do a notify here? Kacheong suggests that the notify be done at
6737 * the send time.. so you would push up a notification if any send
6738 * failed. Don't know if this is feasable since the only failures we
6739 * have is "memory" related and if you cannot get an mbuf to send
6740 * the data you surely can't get an mbuf to send up to notify the
6741 * user you can't send the data :->
6744 /* now free everything */
6745 sctp_m_freem(ca->m);
6746 SCTP_FREE(ca, SCTP_M_COPYAL);
6749 static struct mbuf *
6750 sctp_copy_out_all(struct uio *uio, int len)
6752 struct mbuf *ret, *at;
6753 int left, willcpy, cancpy, error;
6755 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6761 SCTP_BUF_LEN(ret) = 0;
6762 /* save space for the data chunk header */
6763 cancpy = M_TRAILINGSPACE(ret);
6764 willcpy = min(cancpy, left);
6767 /* Align data to the end */
6768 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6774 SCTP_BUF_LEN(at) = willcpy;
6775 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6778 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6779 if (SCTP_BUF_NEXT(at) == NULL) {
6782 at = SCTP_BUF_NEXT(at);
6783 SCTP_BUF_LEN(at) = 0;
6784 cancpy = M_TRAILINGSPACE(at);
6785 willcpy = min(cancpy, left);
6792 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6793 struct sctp_sndrcvinfo *srcv)
6796 struct sctp_copy_all *ca;
6798 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6802 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6805 memset(ca, 0, sizeof(struct sctp_copy_all));
6809 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6812 * take off the sendall flag, it would be bad if we failed to do
6815 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6816 /* get length and mbuf chain */
6818 ca->sndlen = uio->uio_resid;
6819 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6820 if (ca->m == NULL) {
6821 SCTP_FREE(ca, SCTP_M_COPYAL);
6822 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6826 /* Gather the length of the send */
6830 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6831 ca->sndlen += SCTP_BUF_LEN(mat);
6834 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6835 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6836 SCTP_ASOC_ANY_STATE,
6838 sctp_sendall_completes, inp, 1);
6840 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6841 SCTP_FREE(ca, SCTP_M_COPYAL);
6842 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6850 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6852 struct sctp_tmit_chunk *chk, *nchk;
6854 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6855 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6856 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6858 sctp_m_freem(chk->data);
6861 asoc->ctrl_queue_cnt--;
6862 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6868 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6870 struct sctp_association *asoc;
6871 struct sctp_tmit_chunk *chk, *nchk;
6872 struct sctp_asconf_chunk *acp;
6875 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6876 /* find SCTP_ASCONF chunk in queue */
6877 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6879 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6880 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6885 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6887 sctp_m_freem(chk->data);
6890 asoc->ctrl_queue_cnt--;
6891 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6898 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6899 struct sctp_association *asoc,
6900 struct sctp_tmit_chunk **data_list,
6902 struct sctp_nets *net)
6905 struct sctp_tmit_chunk *tp1;
6907 for (i = 0; i < bundle_at; i++) {
6908 /* off of the send queue */
6909 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6910 asoc->send_queue_cnt--;
6913 * Any chunk NOT 0 you zap the time chunk 0 gets
6914 * zapped or set based on if a RTO measurment is
6917 data_list[i]->do_rtt = 0;
6920 data_list[i]->sent_rcv_time = net->last_sent_time;
6921 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6922 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6923 if (data_list[i]->whoTo == NULL) {
6924 data_list[i]->whoTo = net;
6925 atomic_add_int(&net->ref_count, 1);
6927 /* on to the sent queue */
6928 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6929 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6930 struct sctp_tmit_chunk *tpp;
6932 /* need to move back */
6934 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6936 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6940 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6943 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6945 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6950 /* This does not lower until the cum-ack passes it */
6951 asoc->sent_queue_cnt++;
6952 if ((asoc->peers_rwnd <= 0) &&
6953 (asoc->total_flight == 0) &&
6955 /* Mark the chunk as being a window probe */
6956 SCTP_STAT_INCR(sctps_windowprobed);
6958 #ifdef SCTP_AUDITING_ENABLED
6959 sctp_audit_log(0xC2, 3);
6961 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6962 data_list[i]->snd_count = 1;
6963 data_list[i]->rec.data.chunk_was_revoked = 0;
6964 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6965 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6966 data_list[i]->whoTo->flight_size,
6967 data_list[i]->book_size,
6968 (uintptr_t) data_list[i]->whoTo,
6969 data_list[i]->rec.data.TSN_seq);
6971 sctp_flight_size_increase(data_list[i]);
6972 sctp_total_flight_increase(stcb, data_list[i]);
6973 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6974 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6975 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6977 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6978 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6979 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6980 /* SWS sender side engages */
6981 asoc->peers_rwnd = 0;
6984 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6985 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6990 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6991 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6996 struct sctp_tmit_chunk *chk, *nchk;
6998 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6999 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7000 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7001 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7002 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7003 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7004 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7005 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7006 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7007 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7008 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7009 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7010 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7011 /* Stray chunks must be cleaned up */
7013 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7015 sctp_m_freem(chk->data);
7018 asoc->ctrl_queue_cnt--;
7019 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7020 asoc->fwd_tsn_cnt--;
7021 sctp_free_a_chunk(stcb, chk, so_locked);
7022 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7023 /* special handling, we must look into the param */
7024 if (chk != asoc->str_reset) {
7025 goto clean_up_anyway;
7033 sctp_can_we_split_this(struct sctp_tcb *stcb,
7035 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7038 * Make a decision on if I should split a msg into multiple parts.
7039 * This is only asked of incomplete messages.
7043 * If we are doing EEOR we need to always send it if its the
7044 * entire thing, since it might be all the guy is putting in
7047 if (goal_mtu >= length) {
7049 * If we have data outstanding,
7050 * we get another chance when the sack
7051 * arrives to transmit - wait for more data
7053 if (stcb->asoc.total_flight == 0) {
7055 * If nothing is in flight, we zero the
7063 /* You can fill the rest */
7068 * For those strange folk that make the send buffer
7069 * smaller than our fragmentation point, we can't
7070 * get a full msg in so we have to allow splitting.
7072 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7075 if ((length <= goal_mtu) ||
7076 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7077 /* Sub-optimial residual don't split in non-eeor mode. */
7081 * If we reach here length is larger than the goal_mtu. Do we wish
7082 * to split it for the sake of packet putting together?
7084 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7085 /* Its ok to split it */
7086 return (min(goal_mtu, frag_point));
7088 /* Nope, can't split */
7094 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7095 struct sctp_stream_out *strq,
7097 uint32_t frag_point,
7103 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7108 /* Move from the stream to the send_queue keeping track of the total */
7109 struct sctp_association *asoc;
7110 struct sctp_stream_queue_pending *sp;
7111 struct sctp_tmit_chunk *chk;
7112 struct sctp_data_chunk *dchkh;
7113 uint32_t to_move, length;
7114 uint8_t rcv_flags = 0;
7116 uint8_t send_lock_up = 0;
7118 SCTP_TCB_LOCK_ASSERT(stcb);
7121 /* sa_ignore FREED_MEMORY */
7122 sp = TAILQ_FIRST(&strq->outqueue);
7125 if (send_lock_up == 0) {
7126 SCTP_TCB_SEND_LOCK(stcb);
7129 sp = TAILQ_FIRST(&strq->outqueue);
7133 if (strq->last_msg_incomplete) {
7134 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7136 strq->last_msg_incomplete);
7137 strq->last_msg_incomplete = 0;
7141 SCTP_TCB_SEND_UNLOCK(stcb);
7146 if ((sp->msg_is_complete) && (sp->length == 0)) {
7147 if (sp->sender_all_done) {
7149 * We are doing differed cleanup. Last time through
7150 * when we took all the data the sender_all_done was
7153 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7154 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7155 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7156 sp->sender_all_done,
7158 sp->msg_is_complete,
7162 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7163 SCTP_TCB_SEND_LOCK(stcb);
7166 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7167 TAILQ_REMOVE(&strq->outqueue, sp, next);
7168 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7170 sctp_free_remote_addr(sp->net);
7174 sctp_m_freem(sp->data);
7177 sctp_free_a_strmoq(stcb, sp, so_locked);
7178 /* we can't be locked to it */
7180 stcb->asoc.locked_on_sending = NULL;
7182 SCTP_TCB_SEND_UNLOCK(stcb);
7185 /* back to get the next msg */
7189 * sender just finished this but still holds a
7198 /* is there some to get */
7199 if (sp->length == 0) {
7205 } else if (sp->discard_rest) {
7206 if (send_lock_up == 0) {
7207 SCTP_TCB_SEND_LOCK(stcb);
7210 /* Whack down the size */
7211 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7212 if ((stcb->sctp_socket != NULL) && \
7213 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7214 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7215 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7218 sctp_m_freem(sp->data);
7220 sp->tail_mbuf = NULL;
7230 some_taken = sp->some_taken;
7231 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7232 sp->msg_is_complete = 1;
7235 length = sp->length;
7236 if (sp->msg_is_complete) {
7237 /* The message is complete */
7238 to_move = min(length, frag_point);
7239 if (to_move == length) {
7240 /* All of it fits in the MTU */
7241 if (sp->some_taken) {
7242 rcv_flags |= SCTP_DATA_LAST_FRAG;
7243 sp->put_last_out = 1;
7245 rcv_flags |= SCTP_DATA_NOT_FRAG;
7246 sp->put_last_out = 1;
7249 /* Not all of it fits, we fragment */
7250 if (sp->some_taken == 0) {
7251 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7256 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7259 * We use a snapshot of length in case it
7260 * is expanding during the compare.
7265 if (to_move >= llen) {
7267 if (send_lock_up == 0) {
7269 * We are taking all of an incomplete msg
7270 * thus we need a send lock.
7272 SCTP_TCB_SEND_LOCK(stcb);
7274 if (sp->msg_is_complete) {
7276 * the sender finished the
7283 if (sp->some_taken == 0) {
7284 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7288 /* Nothing to take. */
7289 if (sp->some_taken) {
7298 /* If we reach here, we can copy out a chunk */
7299 sctp_alloc_a_chunk(stcb, chk);
7301 /* No chunk memory */
7307 * Setup for unordered if needed by looking at the user sent info
7310 if (sp->sinfo_flags & SCTP_UNORDERED) {
7311 rcv_flags |= SCTP_DATA_UNORDERED;
7313 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7314 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7315 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7317 /* clear out the chunk before setting up */
7318 memset(chk, 0, sizeof(*chk));
7319 chk->rec.data.rcv_flags = rcv_flags;
7321 if (to_move >= length) {
7322 /* we think we can steal the whole thing */
7323 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7324 SCTP_TCB_SEND_LOCK(stcb);
7327 if (to_move < sp->length) {
7328 /* bail, it changed */
7331 chk->data = sp->data;
7332 chk->last_mbuf = sp->tail_mbuf;
7333 /* register the stealing */
7334 sp->data = sp->tail_mbuf = NULL;
7339 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7340 chk->last_mbuf = NULL;
7341 if (chk->data == NULL) {
7342 sp->some_taken = some_taken;
7343 sctp_free_a_chunk(stcb, chk, so_locked);
7348 #ifdef SCTP_MBUF_LOGGING
7349 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7350 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7353 /* Pull off the data */
7354 m_adj(sp->data, to_move);
7355 /* Now lets work our way down and compact it */
7357 while (m && (SCTP_BUF_LEN(m) == 0)) {
7358 sp->data = SCTP_BUF_NEXT(m);
7359 SCTP_BUF_NEXT(m) = NULL;
7360 if (sp->tail_mbuf == m) {
7362 * Freeing tail? TSNH since
7363 * we supposedly were taking less
7364 * than the sp->length.
7367 panic("Huh, freing tail? - TSNH");
7369 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7370 sp->tail_mbuf = sp->data = NULL;
7379 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7380 chk->copy_by_ref = 1;
7382 chk->copy_by_ref = 0;
7385 * get last_mbuf and counts of mb useage This is ugly but hopefully
7386 * its only one mbuf.
7388 if (chk->last_mbuf == NULL) {
7389 chk->last_mbuf = chk->data;
7390 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7391 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7394 if (to_move > length) {
7395 /*- This should not happen either
7396 * since we always lower to_move to the size
7397 * of sp->length if its larger.
7400 panic("Huh, how can to_move be larger?");
7402 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7406 atomic_subtract_int(&sp->length, to_move);
7408 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7409 /* Not enough room for a chunk header, get some */
7412 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7415 * we're in trouble here. _PREPEND below will free
7416 * all the data if there is no leading space, so we
7417 * must put the data back and restore.
7419 if (send_lock_up == 0) {
7420 SCTP_TCB_SEND_LOCK(stcb);
7423 if (sp->data == NULL) {
7424 /* unsteal the data */
7425 sp->data = chk->data;
7426 sp->tail_mbuf = chk->last_mbuf;
7430 /* reassemble the data */
7432 sp->data = chk->data;
7433 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7435 sp->some_taken = some_taken;
7436 atomic_add_int(&sp->length, to_move);
7439 sctp_free_a_chunk(stcb, chk, so_locked);
7443 SCTP_BUF_LEN(m) = 0;
7444 SCTP_BUF_NEXT(m) = chk->data;
7446 M_ALIGN(chk->data, 4);
7449 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7450 if (chk->data == NULL) {
7451 /* HELP, TSNH since we assured it would not above? */
7453 panic("prepend failes HELP?");
7455 SCTP_PRINTF("prepend fails HELP?\n");
7456 sctp_free_a_chunk(stcb, chk, so_locked);
7462 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7463 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7464 chk->book_size_scale = 0;
7465 chk->sent = SCTP_DATAGRAM_UNSENT;
7468 chk->asoc = &stcb->asoc;
7469 chk->pad_inplace = 0;
7470 chk->no_fr_allowed = 0;
7471 chk->rec.data.stream_seq = strq->next_sequence_send;
7472 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7473 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7474 strq->next_sequence_send++;
7476 chk->rec.data.stream_number = sp->stream;
7477 chk->rec.data.payloadtype = sp->ppid;
7478 chk->rec.data.context = sp->context;
7479 chk->rec.data.doing_fast_retransmit = 0;
7481 chk->rec.data.timetodrop = sp->ts;
7482 chk->flags = sp->act_flags;
7485 chk->whoTo = sp->net;
7486 atomic_add_int(&chk->whoTo->ref_count, 1);
7490 if (sp->holds_key_ref) {
7491 chk->auth_keyid = sp->auth_keyid;
7492 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7493 chk->holds_key_ref = 1;
7495 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7496 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7497 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7498 (uintptr_t) stcb, sp->length,
7499 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7500 chk->rec.data.TSN_seq);
7502 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7504 * Put the rest of the things in place now. Size was done earlier in
7505 * previous loop prior to padding.
7508 #ifdef SCTP_ASOCLOG_OF_TSNS
7509 SCTP_TCB_LOCK_ASSERT(stcb);
7510 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7511 asoc->tsn_out_at = 0;
7512 asoc->tsn_out_wrapped = 1;
7514 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7515 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7516 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7517 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7518 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7519 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7520 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7521 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7525 dchkh->ch.chunk_type = SCTP_DATA;
7526 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7527 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7528 dchkh->dp.stream_id = htons(strq->stream_no);
7529 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7530 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7531 dchkh->ch.chunk_length = htons(chk->send_size);
7532 /* Now advance the chk->send_size by the actual pad needed. */
7533 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7538 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7539 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7541 chk->last_mbuf = lm;
7542 chk->pad_inplace = 1;
7544 chk->send_size += pads;
7546 if (PR_SCTP_ENABLED(chk->flags)) {
7547 asoc->pr_sctp_cnt++;
7549 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7550 /* All done pull and kill the message */
7551 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7552 if (sp->put_last_out == 0) {
7553 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7554 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7555 sp->sender_all_done,
7557 sp->msg_is_complete,
7561 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7562 SCTP_TCB_SEND_LOCK(stcb);
7565 TAILQ_REMOVE(&strq->outqueue, sp, next);
7566 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7568 sctp_free_remote_addr(sp->net);
7572 sctp_m_freem(sp->data);
7575 sctp_free_a_strmoq(stcb, sp, so_locked);
7577 /* we can't be locked to it */
7579 stcb->asoc.locked_on_sending = NULL;
7581 /* more to go, we are locked */
7584 asoc->chunks_on_out_queue++;
7585 strq->chunks_on_queues++;
7586 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7587 asoc->send_queue_cnt++;
7590 SCTP_TCB_SEND_UNLOCK(stcb);
7597 sctp_fill_outqueue(struct sctp_tcb *stcb,
7598 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7599 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7604 struct sctp_association *asoc;
7605 struct sctp_stream_out *strq;
7606 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7609 SCTP_TCB_LOCK_ASSERT(stcb);
7611 switch (net->ro._l_addr.sa.sa_family) {
7614 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7619 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7624 goal_mtu = net->mtu;
7627 /* Need an allowance for the data chunk header too */
7628 goal_mtu -= sizeof(struct sctp_data_chunk);
7630 /* must make even word boundary */
7631 goal_mtu &= 0xfffffffc;
7632 if (asoc->locked_on_sending) {
7633 /* We are stuck on one stream until the message completes. */
7634 strq = asoc->locked_on_sending;
7637 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7640 while ((goal_mtu > 0) && strq) {
7643 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7644 &giveup, eeor_mode, &bail, so_locked);
7646 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7649 asoc->locked_on_sending = strq;
7650 if ((moved_how_much == 0) || (giveup) || bail)
7651 /* no more to move for now */
7654 asoc->locked_on_sending = NULL;
7655 if ((giveup) || bail) {
7658 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7663 total_moved += moved_how_much;
7664 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7665 goal_mtu &= 0xfffffffc;
7670 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7672 if (total_moved == 0) {
7673 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7674 (net == stcb->asoc.primary_destination)) {
7675 /* ran dry for primary network net */
7676 SCTP_STAT_INCR(sctps_primary_randry);
7677 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7678 /* ran dry with CMT on */
7679 SCTP_STAT_INCR(sctps_cmt_randry);
7685 sctp_fix_ecn_echo(struct sctp_association *asoc)
7687 struct sctp_tmit_chunk *chk;
7689 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7690 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7691 chk->sent = SCTP_DATAGRAM_UNSENT;
7697 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7699 struct sctp_association *asoc;
7700 struct sctp_tmit_chunk *chk;
7701 struct sctp_stream_queue_pending *sp;
7708 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7709 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7710 if (sp->net == net) {
7711 sctp_free_remote_addr(sp->net);
7716 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7717 if (chk->whoTo == net) {
7718 sctp_free_remote_addr(chk->whoTo);
7725 sctp_med_chunk_output(struct sctp_inpcb *inp,
7726 struct sctp_tcb *stcb,
7727 struct sctp_association *asoc,
7730 int control_only, int from_where,
7731 struct timeval *now, int *now_filled, int frag_point, int so_locked
7732 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7738 * Ok this is the generic chunk service queue. we must do the
7739 * following: - Service the stream queue that is next, moving any
7740 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7741 * LAST to the out queue in one pass) and assigning TSN's - Check to
7742 * see if the cwnd/rwnd allows any output, if so we go ahead and
7743 * fomulate and send the low level chunks. Making sure to combine
7744 * any control in the control chunk queue also.
7746 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7747 struct mbuf *outchain, *endoutchain;
7748 struct sctp_tmit_chunk *chk, *nchk;
7750 /* temp arrays for unlinking */
7751 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7752 int no_fragmentflg, error;
7753 unsigned int max_rwnd_per_dest, max_send_per_dest;
7754 int one_chunk, hbflag, skip_data_for_this_net;
7755 int asconf, cookie, no_out_cnt;
7756 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7757 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7759 uint32_t auth_offset = 0;
7760 struct sctp_auth_chunk *auth = NULL;
7761 uint16_t auth_keyid;
7762 int override_ok = 1;
7763 int skip_fill_up = 0;
7764 int data_auth_reqd = 0;
7767 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7774 auth_keyid = stcb->asoc.authinfo.active_keyid;
7775 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7776 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7777 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7782 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7784 * First lets prime the pump. For each destination, if there is room
7785 * in the flight size, attempt to pull an MTU's worth out of the
7786 * stream queues into the general send_queue
7788 #ifdef SCTP_AUDITING_ENABLED
7789 sctp_audit_log(0xC2, 2);
7791 SCTP_TCB_LOCK_ASSERT(stcb);
7793 if ((control_only) || (asoc->stream_reset_outstanding))
7798 /* Nothing to possible to send? */
7799 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7800 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7801 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7802 TAILQ_EMPTY(&asoc->send_queue) &&
7803 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7808 if (asoc->peers_rwnd == 0) {
7809 /* No room in peers rwnd */
7811 if (asoc->total_flight > 0) {
7812 /* we are allowed one chunk in flight */
7816 if (stcb->asoc.ecn_echo_cnt_onq) {
7817 /* Record where a sack goes, if any */
7818 if (no_data_chunks &&
7819 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7820 /* Nothing but ECNe to send - we don't do that */
7821 goto nothing_to_send;
7823 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7824 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7825 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7826 sack_goes_to = chk->whoTo;
7831 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7832 if (stcb->sctp_socket)
7833 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7835 max_send_per_dest = 0;
7836 if (no_data_chunks == 0) {
7837 /* How many non-directed chunks are there? */
7838 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7839 if (chk->whoTo == NULL) {
7841 * We already have non-directed chunks on
7842 * the queue, no need to do a fill-up.
7850 if ((no_data_chunks == 0) &&
7851 (skip_fill_up == 0) &&
7852 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7853 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7855 * This for loop we are in takes in each net, if
7856 * its's got space in cwnd and has data sent to it
7857 * (when CMT is off) then it calls
7858 * sctp_fill_outqueue for the net. This gets data on
7859 * the send queue for that network.
7861 * In sctp_fill_outqueue TSN's are assigned and data is
7862 * copied out of the stream buffers. Note mostly
7863 * copy by reference (we hope).
7865 net->window_probe = 0;
7866 if ((net != stcb->asoc.alternate) &&
7867 ((net->dest_state & SCTP_ADDR_PF) ||
7868 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7869 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7870 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7871 sctp_log_cwnd(stcb, net, 1,
7872 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7876 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7877 (net->flight_size == 0)) {
7878 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7880 if (net->flight_size >= net->cwnd) {
7881 /* skip this network, no room - can't fill */
7882 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7883 sctp_log_cwnd(stcb, net, 3,
7884 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7888 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7889 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7891 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7893 /* memory alloc failure */
7899 /* now service each destination and send out what we can for it */
7900 /* Nothing to send? */
7901 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7902 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7903 TAILQ_EMPTY(&asoc->send_queue)) {
7907 if (asoc->sctp_cmt_on_off > 0) {
7908 /* get the last start point */
7909 start_at = asoc->last_net_cmt_send_started;
7910 if (start_at == NULL) {
7911 /* null so to beginning */
7912 start_at = TAILQ_FIRST(&asoc->nets);
7914 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7915 if (start_at == NULL) {
7916 start_at = TAILQ_FIRST(&asoc->nets);
7919 asoc->last_net_cmt_send_started = start_at;
7921 start_at = TAILQ_FIRST(&asoc->nets);
7923 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7924 if (chk->whoTo == NULL) {
7925 if (asoc->alternate) {
7926 chk->whoTo = asoc->alternate;
7928 chk->whoTo = asoc->primary_destination;
7930 atomic_add_int(&chk->whoTo->ref_count, 1);
7933 old_start_at = NULL;
7934 again_one_more_time:
7935 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7936 /* how much can we send? */
7937 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7938 if (old_start_at && (old_start_at == net)) {
7939 /* through list ocmpletely. */
7943 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7944 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7945 (net->flight_size >= net->cwnd)) {
7947 * Nothing on control or asconf and flight is full,
7948 * we can skip even in the CMT case.
7953 endoutchain = outchain = NULL;
7956 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7957 skip_data_for_this_net = 1;
7959 skip_data_for_this_net = 0;
7961 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7963 * if we have a route and an ifp check to see if we
7964 * have room to send to this guy
7968 ifp = net->ro.ro_rt->rt_ifp;
7969 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7970 SCTP_STAT_INCR(sctps_ifnomemqueued);
7971 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7972 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7977 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7980 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7985 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7995 if (mtu > asoc->peers_rwnd) {
7996 if (asoc->total_flight > 0) {
7997 /* We have a packet in flight somewhere */
7998 r_mtu = asoc->peers_rwnd;
8000 /* We are always allowed to send one MTU out */
8007 /************************/
8008 /* ASCONF transmission */
8009 /************************/
8010 /* Now first lets go through the asconf queue */
8011 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8012 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8015 if (chk->whoTo == NULL) {
8016 if (asoc->alternate == NULL) {
8017 if (asoc->primary_destination != net) {
8021 if (asoc->alternate != net) {
8026 if (chk->whoTo != net) {
8030 if (chk->data == NULL) {
8033 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8034 chk->sent != SCTP_DATAGRAM_RESEND) {
8038 * if no AUTH is yet included and this chunk
8039 * requires it, make sure to account for it. We
8040 * don't apply the size until the AUTH chunk is
8041 * actually added below in case there is no room for
8042 * this chunk. NOTE: we overload the use of "omtu"
8045 if ((auth == NULL) &&
8046 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8047 stcb->asoc.peer_auth_chunks)) {
8048 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8051 /* Here we do NOT factor the r_mtu */
8052 if ((chk->send_size < (int)(mtu - omtu)) ||
8053 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8055 * We probably should glom the mbuf chain
8056 * from the chk->data for control but the
8057 * problem is it becomes yet one more level
8058 * of tracking to do if for some reason
8059 * output fails. Then I have got to
8060 * reconstruct the merged control chain.. el
8061 * yucko.. for now we take the easy way and
8065 * Add an AUTH chunk, if chunk requires it
8066 * save the offset into the chain for AUTH
8068 if ((auth == NULL) &&
8069 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8070 stcb->asoc.peer_auth_chunks))) {
8071 outchain = sctp_add_auth_chunk(outchain,
8076 chk->rec.chunk_id.id);
8077 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8079 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8080 (int)chk->rec.chunk_id.can_take_data,
8081 chk->send_size, chk->copy_by_ref);
8082 if (outchain == NULL) {
8084 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8087 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8088 /* update our MTU size */
8089 if (mtu > (chk->send_size + omtu))
8090 mtu -= (chk->send_size + omtu);
8093 to_out += (chk->send_size + omtu);
8094 /* Do clear IP_DF ? */
8095 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8098 if (chk->rec.chunk_id.can_take_data)
8101 * set hb flag since we can use these for
8107 * should sysctl this: don't bundle data
8108 * with ASCONF since it requires AUTH
8111 chk->sent = SCTP_DATAGRAM_SENT;
8112 if (chk->whoTo == NULL) {
8114 atomic_add_int(&net->ref_count, 1);
8119 * Ok we are out of room but we can
8120 * output without effecting the
8121 * flight size since this little guy
8122 * is a control only packet.
8124 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8126 * do NOT clear the asconf flag as
8127 * it is used to do appropriate
8128 * source address selection.
8130 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8131 (struct sockaddr *)&net->ro._l_addr,
8132 outchain, auth_offset, auth,
8133 stcb->asoc.authinfo.active_keyid,
8134 no_fragmentflg, 0, asconf,
8135 inp->sctp_lport, stcb->rport,
8136 htonl(stcb->asoc.peer_vtag),
8140 if (error == ENOBUFS) {
8141 asoc->ifp_had_enobuf = 1;
8142 SCTP_STAT_INCR(sctps_lowlevelerr);
8144 if (from_where == 0) {
8145 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8147 if (*now_filled == 0) {
8148 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8150 *now = net->last_sent_time;
8152 net->last_sent_time = *now;
8155 /* error, could not output */
8156 if (error == EHOSTUNREACH) {
8162 sctp_move_chunks_from_net(stcb, net);
8167 asoc->ifp_had_enobuf = 0;
8168 if (*now_filled == 0) {
8169 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8171 *now = net->last_sent_time;
8173 net->last_sent_time = *now;
8177 * increase the number we sent, if a
8178 * cookie is sent we don't tell them
8181 outchain = endoutchain = NULL;
8185 *num_out += ctl_cnt;
8186 /* recalc a clean slate and setup */
8187 switch (net->ro._l_addr.sa.sa_family) {
8190 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8195 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8208 /************************/
8209 /* Control transmission */
8210 /************************/
8211 /* Now first lets go through the control queue */
8212 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8213 if ((sack_goes_to) &&
8214 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8215 (chk->whoTo != sack_goes_to)) {
8217 * if we have a sack in queue, and we are
8218 * looking at an ecn echo that is NOT queued
8219 * to where the sack is going..
8221 if (chk->whoTo == net) {
8223 * Don't transmit it to where its
8224 * going (current net)
8227 } else if (sack_goes_to == net) {
8229 * But do transmit it to this
8232 goto skip_net_check;
8235 if (chk->whoTo == NULL) {
8236 if (asoc->alternate == NULL) {
8237 if (asoc->primary_destination != net) {
8241 if (asoc->alternate != net) {
8246 if (chk->whoTo != net) {
8251 if (chk->data == NULL) {
8254 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8256 * It must be unsent. Cookies and ASCONF's
8257 * hang around but there timers will force
8258 * when marked for resend.
8263 * if no AUTH is yet included and this chunk
8264 * requires it, make sure to account for it. We
8265 * don't apply the size until the AUTH chunk is
8266 * actually added below in case there is no room for
8267 * this chunk. NOTE: we overload the use of "omtu"
8270 if ((auth == NULL) &&
8271 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8272 stcb->asoc.peer_auth_chunks)) {
8273 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8276 /* Here we do NOT factor the r_mtu */
8277 if ((chk->send_size <= (int)(mtu - omtu)) ||
8278 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8280 * We probably should glom the mbuf chain
8281 * from the chk->data for control but the
8282 * problem is it becomes yet one more level
8283 * of tracking to do if for some reason
8284 * output fails. Then I have got to
8285 * reconstruct the merged control chain.. el
8286 * yucko.. for now we take the easy way and
8290 * Add an AUTH chunk, if chunk requires it
8291 * save the offset into the chain for AUTH
8293 if ((auth == NULL) &&
8294 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8295 stcb->asoc.peer_auth_chunks))) {
8296 outchain = sctp_add_auth_chunk(outchain,
8301 chk->rec.chunk_id.id);
8302 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8304 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8305 (int)chk->rec.chunk_id.can_take_data,
8306 chk->send_size, chk->copy_by_ref);
8307 if (outchain == NULL) {
8309 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8312 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8313 /* update our MTU size */
8314 if (mtu > (chk->send_size + omtu))
8315 mtu -= (chk->send_size + omtu);
8318 to_out += (chk->send_size + omtu);
8319 /* Do clear IP_DF ? */
8320 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8323 if (chk->rec.chunk_id.can_take_data)
8325 /* Mark things to be removed, if needed */
8326 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8327 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8328 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8329 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8330 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8331 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8332 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8333 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8334 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8335 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8336 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8337 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8340 /* remove these chunks at the end */
8341 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8342 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8343 /* turn off the timer */
8344 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8345 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8347 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8353 * Other chunks, since they have
8354 * timers running (i.e. COOKIE) we
8355 * just "trust" that it gets sent or
8359 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8362 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8364 * Increment ecne send count
8365 * here this means we may be
8366 * over-zealous in our
8367 * counting if the send
8368 * fails, but its the best
8369 * place to do it (we used
8370 * to do it in the queue of
8371 * the chunk, but that did
8372 * not tell how many times
8375 SCTP_STAT_INCR(sctps_sendecne);
8377 chk->sent = SCTP_DATAGRAM_SENT;
8378 if (chk->whoTo == NULL) {
8380 atomic_add_int(&net->ref_count, 1);
8386 * Ok we are out of room but we can
8387 * output without effecting the
8388 * flight size since this little guy
8389 * is a control only packet.
8392 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8394 * do NOT clear the asconf
8395 * flag as it is used to do
8396 * appropriate source
8397 * address selection.
8401 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8404 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8405 (struct sockaddr *)&net->ro._l_addr,
8408 stcb->asoc.authinfo.active_keyid,
8409 no_fragmentflg, 0, asconf,
8410 inp->sctp_lport, stcb->rport,
8411 htonl(stcb->asoc.peer_vtag),
8415 if (error == ENOBUFS) {
8416 asoc->ifp_had_enobuf = 1;
8417 SCTP_STAT_INCR(sctps_lowlevelerr);
8419 if (from_where == 0) {
8420 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8422 /* error, could not output */
8424 if (*now_filled == 0) {
8425 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8427 *now = net->last_sent_time;
8429 net->last_sent_time = *now;
8433 if (error == EHOSTUNREACH) {
8439 sctp_move_chunks_from_net(stcb, net);
8444 asoc->ifp_had_enobuf = 0;
8445 /* Only HB or ASCONF advances time */
8447 if (*now_filled == 0) {
8448 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8450 *now = net->last_sent_time;
8452 net->last_sent_time = *now;
8457 * increase the number we sent, if a
8458 * cookie is sent we don't tell them
8461 outchain = endoutchain = NULL;
8465 *num_out += ctl_cnt;
8466 /* recalc a clean slate and setup */
8467 switch (net->ro._l_addr.sa.sa_family) {
8470 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8475 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8488 /* JRI: if dest is in PF state, do not send data to it */
8489 if ((asoc->sctp_cmt_on_off > 0) &&
8490 (net != stcb->asoc.alternate) &&
8491 (net->dest_state & SCTP_ADDR_PF)) {
8494 if (net->flight_size >= net->cwnd) {
8497 if ((asoc->sctp_cmt_on_off > 0) &&
8498 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8499 (net->flight_size > max_rwnd_per_dest)) {
8503 * We need a specific accounting for the usage of the send
8504 * buffer. We also need to check the number of messages per
8505 * net. For now, this is better than nothing and it disabled
8508 if ((asoc->sctp_cmt_on_off > 0) &&
8509 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8510 (max_send_per_dest > 0) &&
8511 (net->flight_size > max_send_per_dest)) {
8514 /*********************/
8515 /* Data transmission */
8516 /*********************/
8518 * if AUTH for DATA is required and no AUTH has been added
8519 * yet, account for this in the mtu now... if no data can be
8520 * bundled, this adjustment won't matter anyways since the
8521 * packet will be going out...
8523 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8524 stcb->asoc.peer_auth_chunks);
8525 if (data_auth_reqd && (auth == NULL)) {
8526 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8528 /* now lets add any data within the MTU constraints */
8529 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8532 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8533 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8540 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8541 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8551 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8552 (skip_data_for_this_net == 0)) ||
8554 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8555 if (no_data_chunks) {
8556 /* let only control go out */
8560 if (net->flight_size >= net->cwnd) {
8561 /* skip this net, no room for data */
8565 if ((chk->whoTo != NULL) &&
8566 (chk->whoTo != net)) {
8567 /* Don't send the chunk on this net */
8570 if (asoc->sctp_cmt_on_off == 0) {
8571 if ((asoc->alternate) &&
8572 (asoc->alternate != net) &&
8573 (chk->whoTo == NULL)) {
8575 } else if ((net != asoc->primary_destination) &&
8576 (asoc->alternate == NULL) &&
8577 (chk->whoTo == NULL)) {
8581 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8583 * strange, we have a chunk that is
8584 * to big for its destination and
8585 * yet no fragment ok flag.
8586 * Something went wrong when the
8587 * PMTU changed...we did not mark
8588 * this chunk for some reason?? I
8589 * will fix it here by letting IP
8590 * fragment it for now and printing
8591 * a warning. This really should not
8594 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8595 chk->send_size, mtu);
8596 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8598 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8599 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8600 struct sctp_data_chunk *dchkh;
8602 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8603 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8605 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8606 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8607 /* ok we will add this one */
8610 * Add an AUTH chunk, if chunk
8611 * requires it, save the offset into
8612 * the chain for AUTH
8614 if (data_auth_reqd) {
8616 outchain = sctp_add_auth_chunk(outchain,
8622 auth_keyid = chk->auth_keyid;
8624 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8625 } else if (override_ok) {
8630 auth_keyid = chk->auth_keyid;
8632 } else if (auth_keyid != chk->auth_keyid) {
8640 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8641 chk->send_size, chk->copy_by_ref);
8642 if (outchain == NULL) {
8643 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8644 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8645 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8648 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8651 /* upate our MTU size */
8652 /* Do clear IP_DF ? */
8653 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8656 /* unsigned subtraction of mtu */
8657 if (mtu > chk->send_size)
8658 mtu -= chk->send_size;
8661 /* unsigned subtraction of r_mtu */
8662 if (r_mtu > chk->send_size)
8663 r_mtu -= chk->send_size;
8667 to_out += chk->send_size;
8668 if ((to_out > mx_mtu) && no_fragmentflg) {
8670 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8672 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8676 chk->window_probe = 0;
8677 data_list[bundle_at++] = chk;
8678 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8681 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8682 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8683 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8685 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8687 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8688 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8698 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8700 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8701 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8702 data_list[0]->window_probe = 1;
8703 net->window_probe = 1;
8709 * Must be sent in order of the
8710 * TSN's (on a network)
8714 } /* for (chunk gather loop for this net) */
8715 } /* if asoc.state OPEN */
8717 /* Is there something to send for this destination? */
8719 /* We may need to start a control timer or two */
8721 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8724 * do NOT clear the asconf flag as it is
8725 * used to do appropriate source address
8730 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8733 /* must start a send timer if data is being sent */
8734 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8736 * no timer running on this destination
8739 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8741 /* Now send it, if there is anything to send :> */
8742 if ((error = sctp_lowlevel_chunk_output(inp,
8745 (struct sockaddr *)&net->ro._l_addr,
8753 inp->sctp_lport, stcb->rport,
8754 htonl(stcb->asoc.peer_vtag),
8758 /* error, we could not output */
8759 if (error == ENOBUFS) {
8760 SCTP_STAT_INCR(sctps_lowlevelerr);
8761 asoc->ifp_had_enobuf = 1;
8763 if (from_where == 0) {
8764 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8766 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8768 if (*now_filled == 0) {
8769 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8771 *now = net->last_sent_time;
8773 net->last_sent_time = *now;
8777 if (error == EHOSTUNREACH) {
8779 * Destination went unreachable
8782 sctp_move_chunks_from_net(stcb, net);
8786 * I add this line to be paranoid. As far as
8787 * I can tell the continue, takes us back to
8788 * the top of the for, but just to make sure
8789 * I will reset these again here.
8791 ctl_cnt = bundle_at = 0;
8792 continue; /* This takes us back to the
8793 * for() for the nets. */
8795 asoc->ifp_had_enobuf = 0;
8800 if (bundle_at || hbflag) {
8801 /* For data/asconf and hb set time */
8802 if (*now_filled == 0) {
8803 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8805 *now = net->last_sent_time;
8807 net->last_sent_time = *now;
8811 *num_out += (ctl_cnt + bundle_at);
8814 /* setup for a RTO measurement */
8815 tsns_sent = data_list[0]->rec.data.TSN_seq;
8816 /* fill time if not already filled */
8817 if (*now_filled == 0) {
8818 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8820 *now = asoc->time_last_sent;
8822 asoc->time_last_sent = *now;
8824 if (net->rto_needed) {
8825 data_list[0]->do_rtt = 1;
8826 net->rto_needed = 0;
8828 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8829 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8835 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8836 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8839 if (old_start_at == NULL) {
8840 old_start_at = start_at;
8841 start_at = TAILQ_FIRST(&asoc->nets);
8843 goto again_one_more_time;
8846 * At the end there should be no NON timed chunks hanging on this
8849 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8850 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8852 if ((*num_out == 0) && (*reason_code == 0)) {
8857 sctp_clean_up_ctl(stcb, asoc, so_locked);
8862 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8865 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8866 * the control chunk queue.
8868 struct sctp_chunkhdr *hdr;
8869 struct sctp_tmit_chunk *chk;
8872 SCTP_TCB_LOCK_ASSERT(stcb);
8873 sctp_alloc_a_chunk(stcb, chk);
8876 sctp_m_freem(op_err);
8879 chk->copy_by_ref = 0;
8880 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8881 if (op_err == NULL) {
8882 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8886 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8887 chk->send_size += SCTP_BUF_LEN(mat);
8889 chk->sent = SCTP_DATAGRAM_UNSENT;
8891 chk->asoc = &stcb->asoc;
8894 hdr = mtod(op_err, struct sctp_chunkhdr *);
8895 hdr->chunk_type = SCTP_OPERATION_ERROR;
8896 hdr->chunk_flags = 0;
8897 hdr->chunk_length = htons(chk->send_size);
8898 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8901 chk->asoc->ctrl_queue_cnt++;
8905 sctp_send_cookie_echo(struct mbuf *m,
8907 struct sctp_tcb *stcb,
8908 struct sctp_nets *net)
8911 * pull out the cookie and put it at the front of the control chunk
8915 struct mbuf *cookie;
8916 struct sctp_paramhdr parm, *phdr;
8917 struct sctp_chunkhdr *hdr;
8918 struct sctp_tmit_chunk *chk;
8919 uint16_t ptype, plen;
8921 SCTP_TCB_LOCK_ASSERT(stcb);
8922 /* First find the cookie in the param area */
8924 at = offset + sizeof(struct sctp_init_chunk);
8926 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8930 ptype = ntohs(phdr->param_type);
8931 plen = ntohs(phdr->param_length);
8932 if (ptype == SCTP_STATE_COOKIE) {
8935 /* found the cookie */
8936 if ((pad = (plen % 4))) {
8939 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8940 if (cookie == NULL) {
8944 #ifdef SCTP_MBUF_LOGGING
8945 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8946 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
8951 at += SCTP_SIZE32(plen);
8953 /* ok, we got the cookie lets change it into a cookie echo chunk */
8954 /* first the change from param to cookie */
8955 hdr = mtod(cookie, struct sctp_chunkhdr *);
8956 hdr->chunk_type = SCTP_COOKIE_ECHO;
8957 hdr->chunk_flags = 0;
8958 /* get the chunk stuff now and place it in the FRONT of the queue */
8959 sctp_alloc_a_chunk(stcb, chk);
8962 sctp_m_freem(cookie);
8965 chk->copy_by_ref = 0;
8966 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8967 chk->rec.chunk_id.can_take_data = 0;
8968 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8969 chk->send_size = plen;
8970 chk->sent = SCTP_DATAGRAM_UNSENT;
8972 chk->asoc = &stcb->asoc;
8975 atomic_add_int(&chk->whoTo->ref_count, 1);
8976 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8977 chk->asoc->ctrl_queue_cnt++;
8982 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8986 struct sctp_nets *net)
8989 * take a HB request and make it into a HB ack and send it.
8991 struct mbuf *outchain;
8992 struct sctp_chunkhdr *chdr;
8993 struct sctp_tmit_chunk *chk;
8997 /* must have a net pointer */
9000 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9001 if (outchain == NULL) {
9002 /* gak out of memory */
9005 #ifdef SCTP_MBUF_LOGGING
9006 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9007 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9010 chdr = mtod(outchain, struct sctp_chunkhdr *);
9011 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9012 chdr->chunk_flags = 0;
9013 if (chk_length % 4) {
9015 uint32_t cpthis = 0;
9018 padlen = 4 - (chk_length % 4);
9019 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9021 sctp_alloc_a_chunk(stcb, chk);
9024 sctp_m_freem(outchain);
9027 chk->copy_by_ref = 0;
9028 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9029 chk->rec.chunk_id.can_take_data = 1;
9031 chk->send_size = chk_length;
9032 chk->sent = SCTP_DATAGRAM_UNSENT;
9034 chk->asoc = &stcb->asoc;
9035 chk->data = outchain;
9037 atomic_add_int(&chk->whoTo->ref_count, 1);
9038 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9039 chk->asoc->ctrl_queue_cnt++;
9043 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9045 /* formulate and queue a cookie-ack back to sender */
9046 struct mbuf *cookie_ack;
9047 struct sctp_chunkhdr *hdr;
9048 struct sctp_tmit_chunk *chk;
9050 SCTP_TCB_LOCK_ASSERT(stcb);
9052 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9053 if (cookie_ack == NULL) {
9057 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9058 sctp_alloc_a_chunk(stcb, chk);
9061 sctp_m_freem(cookie_ack);
9064 chk->copy_by_ref = 0;
9065 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9066 chk->rec.chunk_id.can_take_data = 1;
9068 chk->send_size = sizeof(struct sctp_chunkhdr);
9069 chk->sent = SCTP_DATAGRAM_UNSENT;
9071 chk->asoc = &stcb->asoc;
9072 chk->data = cookie_ack;
9073 if (chk->asoc->last_control_chunk_from != NULL) {
9074 chk->whoTo = chk->asoc->last_control_chunk_from;
9075 atomic_add_int(&chk->whoTo->ref_count, 1);
9079 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9080 hdr->chunk_type = SCTP_COOKIE_ACK;
9081 hdr->chunk_flags = 0;
9082 hdr->chunk_length = htons(chk->send_size);
9083 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9084 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9085 chk->asoc->ctrl_queue_cnt++;
9091 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9093 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9094 struct mbuf *m_shutdown_ack;
9095 struct sctp_shutdown_ack_chunk *ack_cp;
9096 struct sctp_tmit_chunk *chk;
9098 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9099 if (m_shutdown_ack == NULL) {
9103 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9104 sctp_alloc_a_chunk(stcb, chk);
9107 sctp_m_freem(m_shutdown_ack);
9110 chk->copy_by_ref = 0;
9111 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9112 chk->rec.chunk_id.can_take_data = 1;
9114 chk->send_size = sizeof(struct sctp_chunkhdr);
9115 chk->sent = SCTP_DATAGRAM_UNSENT;
9118 chk->asoc = &stcb->asoc;
9119 chk->data = m_shutdown_ack;
9122 atomic_add_int(&chk->whoTo->ref_count, 1);
9124 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9125 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9126 ack_cp->ch.chunk_flags = 0;
9127 ack_cp->ch.chunk_length = htons(chk->send_size);
9128 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9129 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9130 chk->asoc->ctrl_queue_cnt++;
9135 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9137 /* formulate and queue a SHUTDOWN to the sender */
9138 struct mbuf *m_shutdown;
9139 struct sctp_shutdown_chunk *shutdown_cp;
9140 struct sctp_tmit_chunk *chk;
9142 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9143 if (m_shutdown == NULL) {
9147 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9148 sctp_alloc_a_chunk(stcb, chk);
9151 sctp_m_freem(m_shutdown);
9154 chk->copy_by_ref = 0;
9155 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9156 chk->rec.chunk_id.can_take_data = 1;
9158 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9159 chk->sent = SCTP_DATAGRAM_UNSENT;
9162 chk->asoc = &stcb->asoc;
9163 chk->data = m_shutdown;
9166 atomic_add_int(&chk->whoTo->ref_count, 1);
9168 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9169 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9170 shutdown_cp->ch.chunk_flags = 0;
9171 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9172 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9173 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9174 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9175 chk->asoc->ctrl_queue_cnt++;
9180 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9183 * formulate and queue an ASCONF to the peer. ASCONF parameters
9184 * should be queued on the assoc queue.
9186 struct sctp_tmit_chunk *chk;
9187 struct mbuf *m_asconf;
9190 SCTP_TCB_LOCK_ASSERT(stcb);
9192 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9193 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9194 /* can't send a new one if there is one in flight already */
9197 /* compose an ASCONF chunk, maximum length is PMTU */
9198 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9199 if (m_asconf == NULL) {
9202 sctp_alloc_a_chunk(stcb, chk);
9205 sctp_m_freem(m_asconf);
9208 chk->copy_by_ref = 0;
9209 chk->rec.chunk_id.id = SCTP_ASCONF;
9210 chk->rec.chunk_id.can_take_data = 0;
9211 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9212 chk->data = m_asconf;
9213 chk->send_size = len;
9214 chk->sent = SCTP_DATAGRAM_UNSENT;
9216 chk->asoc = &stcb->asoc;
9219 atomic_add_int(&chk->whoTo->ref_count, 1);
9221 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9222 chk->asoc->ctrl_queue_cnt++;
9227 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9230 * formulate and queue a asconf-ack back to sender. the asconf-ack
9231 * must be stored in the tcb.
9233 struct sctp_tmit_chunk *chk;
9234 struct sctp_asconf_ack *ack, *latest_ack;
9236 struct sctp_nets *net = NULL;
9238 SCTP_TCB_LOCK_ASSERT(stcb);
9239 /* Get the latest ASCONF-ACK */
9240 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9241 if (latest_ack == NULL) {
9244 if (latest_ack->last_sent_to != NULL &&
9245 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9246 /* we're doing a retransmission */
9247 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9250 if (stcb->asoc.last_control_chunk_from == NULL) {
9251 if (stcb->asoc.alternate) {
9252 net = stcb->asoc.alternate;
9254 net = stcb->asoc.primary_destination;
9257 net = stcb->asoc.last_control_chunk_from;
9262 if (stcb->asoc.last_control_chunk_from == NULL) {
9263 if (stcb->asoc.alternate) {
9264 net = stcb->asoc.alternate;
9266 net = stcb->asoc.primary_destination;
9269 net = stcb->asoc.last_control_chunk_from;
9272 latest_ack->last_sent_to = net;
9274 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9275 if (ack->data == NULL) {
9278 /* copy the asconf_ack */
9279 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9280 if (m_ack == NULL) {
9281 /* couldn't copy it */
9284 #ifdef SCTP_MBUF_LOGGING
9285 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9286 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9290 sctp_alloc_a_chunk(stcb, chk);
9294 sctp_m_freem(m_ack);
9297 chk->copy_by_ref = 0;
9298 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9299 chk->rec.chunk_id.can_take_data = 1;
9300 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9303 atomic_add_int(&chk->whoTo->ref_count, 1);
9306 chk->send_size = ack->len;
9307 chk->sent = SCTP_DATAGRAM_UNSENT;
9309 chk->asoc = &stcb->asoc;
9311 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9312 chk->asoc->ctrl_queue_cnt++;
9319 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9320 struct sctp_tcb *stcb,
9321 struct sctp_association *asoc,
9322 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9323 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9329 * send out one MTU of retransmission. If fast_retransmit is
9330 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9331 * rwnd. For a Cookie or Asconf in the control chunk queue we
9332 * retransmit them by themselves.
9334 * For data chunks we will pick out the lowest TSN's in the sent_queue
9335 * marked for resend and bundle them all together (up to a MTU of
9336 * destination). The address to send to should have been
9337 * selected/changed where the retransmission was marked (i.e. in FR
9338 * or t3-timeout routines).
9340 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9341 struct sctp_tmit_chunk *chk, *fwd;
9342 struct mbuf *m, *endofchain;
9343 struct sctp_nets *net = NULL;
9344 uint32_t tsns_sent = 0;
9345 int no_fragmentflg, bundle_at, cnt_thru;
9347 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9348 struct sctp_auth_chunk *auth = NULL;
9349 uint32_t auth_offset = 0;
9350 uint16_t auth_keyid;
9351 int override_ok = 1;
9352 int data_auth_reqd = 0;
9355 SCTP_TCB_LOCK_ASSERT(stcb);
9356 tmr_started = ctl_cnt = bundle_at = error = 0;
9361 endofchain = m = NULL;
9362 auth_keyid = stcb->asoc.authinfo.active_keyid;
9363 #ifdef SCTP_AUDITING_ENABLED
9364 sctp_audit_log(0xC3, 1);
9366 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9367 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9368 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9369 asoc->sent_queue_retran_cnt);
9370 asoc->sent_queue_cnt = 0;
9371 asoc->sent_queue_cnt_removeable = 0;
9372 /* send back 0/0 so we enter normal transmission */
9376 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9377 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9378 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9379 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9380 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9383 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9384 if (chk != asoc->str_reset) {
9386 * not eligible for retran if its
9393 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9397 * Add an AUTH chunk, if chunk requires it save the
9398 * offset into the chain for AUTH
9400 if ((auth == NULL) &&
9401 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9402 stcb->asoc.peer_auth_chunks))) {
9403 m = sctp_add_auth_chunk(m, &endofchain,
9404 &auth, &auth_offset,
9406 chk->rec.chunk_id.id);
9407 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9409 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9415 /* do we have control chunks to retransmit? */
9417 /* Start a timer no matter if we suceed or fail */
9418 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9419 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9420 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9421 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9422 chk->snd_count++; /* update our count */
9423 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9424 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9425 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9426 no_fragmentflg, 0, 0,
9427 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9428 chk->whoTo->port, NULL,
9431 SCTP_STAT_INCR(sctps_lowlevelerr);
9438 * We don't want to mark the net->sent time here since this
9439 * we use this for HB and retrans cannot measure RTT
9441 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9443 chk->sent = SCTP_DATAGRAM_SENT;
9444 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9448 /* Clean up the fwd-tsn list */
9449 sctp_clean_up_ctl(stcb, asoc, so_locked);
9454 * Ok, it is just data retransmission we need to do or that and a
9455 * fwd-tsn with it all.
9457 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9458 return (SCTP_RETRAN_DONE);
9460 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9461 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9462 /* not yet open, resend the cookie and that is it */
9465 #ifdef SCTP_AUDITING_ENABLED
9466 sctp_auditing(20, inp, stcb, NULL);
9468 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9469 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9470 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9471 /* No, not sent to this net or not ready for rtx */
9474 if (chk->data == NULL) {
9475 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9476 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9479 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9480 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9481 /* Gak, we have exceeded max unlucky retran, abort! */
9482 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9484 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9485 atomic_add_int(&stcb->asoc.refcnt, 1);
9486 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9487 SCTP_TCB_LOCK(stcb);
9488 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9489 return (SCTP_RETRAN_EXIT);
9491 /* pick up the net */
9493 switch (net->ro._l_addr.sa.sa_family) {
9496 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9501 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9510 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9511 /* No room in peers rwnd */
9514 tsn = asoc->last_acked_seq + 1;
9515 if (tsn == chk->rec.data.TSN_seq) {
9517 * we make a special exception for this
9518 * case. The peer has no rwnd but is missing
9519 * the lowest chunk.. which is probably what
9520 * is holding up the rwnd.
9522 goto one_chunk_around;
9527 if (asoc->peers_rwnd < mtu) {
9529 if ((asoc->peers_rwnd == 0) &&
9530 (asoc->total_flight == 0)) {
9531 chk->window_probe = 1;
9532 chk->whoTo->window_probe = 1;
9535 #ifdef SCTP_AUDITING_ENABLED
9536 sctp_audit_log(0xC3, 2);
9540 net->fast_retran_ip = 0;
9541 if (chk->rec.data.doing_fast_retransmit == 0) {
9543 * if no FR in progress skip destination that have
9544 * flight_size > cwnd.
9546 if (net->flight_size >= net->cwnd) {
9551 * Mark the destination net to have FR recovery
9555 net->fast_retran_ip = 1;
9559 * if no AUTH is yet included and this chunk requires it,
9560 * make sure to account for it. We don't apply the size
9561 * until the AUTH chunk is actually added below in case
9562 * there is no room for this chunk.
9564 if (data_auth_reqd && (auth == NULL)) {
9565 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9569 if ((chk->send_size <= (mtu - dmtu)) ||
9570 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9571 /* ok we will add this one */
9572 if (data_auth_reqd) {
9574 m = sctp_add_auth_chunk(m,
9580 auth_keyid = chk->auth_keyid;
9582 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9583 } else if (override_ok) {
9584 auth_keyid = chk->auth_keyid;
9586 } else if (chk->auth_keyid != auth_keyid) {
9587 /* different keyid, so done bundling */
9591 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9593 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9596 /* Do clear IP_DF ? */
9597 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9600 /* upate our MTU size */
9601 if (mtu > (chk->send_size + dmtu))
9602 mtu -= (chk->send_size + dmtu);
9605 data_list[bundle_at++] = chk;
9606 if (one_chunk && (asoc->total_flight <= 0)) {
9607 SCTP_STAT_INCR(sctps_windowprobed);
9610 if (one_chunk == 0) {
9612 * now are there anymore forward from chk to pick
9615 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9616 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9617 /* Nope, not for retran */
9620 if (fwd->whoTo != net) {
9621 /* Nope, not the net in question */
9624 if (data_auth_reqd && (auth == NULL)) {
9625 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9628 if (fwd->send_size <= (mtu - dmtu)) {
9629 if (data_auth_reqd) {
9631 m = sctp_add_auth_chunk(m,
9637 auth_keyid = fwd->auth_keyid;
9639 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9640 } else if (override_ok) {
9641 auth_keyid = fwd->auth_keyid;
9643 } else if (fwd->auth_keyid != auth_keyid) {
9651 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9653 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9656 /* Do clear IP_DF ? */
9657 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9660 /* upate our MTU size */
9661 if (mtu > (fwd->send_size + dmtu))
9662 mtu -= (fwd->send_size + dmtu);
9665 data_list[bundle_at++] = fwd;
9666 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9670 /* can't fit so we are done */
9675 /* Is there something to send for this destination? */
9678 * No matter if we fail/or suceed we should start a
9679 * timer. A failure is like a lost IP packet :-)
9681 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9683 * no timer running on this destination
9686 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9689 /* Now lets send it, if there is anything to send :> */
9690 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9691 (struct sockaddr *)&net->ro._l_addr, m,
9692 auth_offset, auth, auth_keyid,
9693 no_fragmentflg, 0, 0,
9694 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9698 /* error, we could not output */
9699 SCTP_STAT_INCR(sctps_lowlevelerr);
9707 * We don't want to mark the net->sent time here
9708 * since this we use this for HB and retrans cannot
9711 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9713 /* For auto-close */
9715 if (*now_filled == 0) {
9716 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9717 *now = asoc->time_last_sent;
9720 asoc->time_last_sent = *now;
9722 *cnt_out += bundle_at;
9723 #ifdef SCTP_AUDITING_ENABLED
9724 sctp_audit_log(0xC4, bundle_at);
9727 tsns_sent = data_list[0]->rec.data.TSN_seq;
9729 for (i = 0; i < bundle_at; i++) {
9730 SCTP_STAT_INCR(sctps_sendretransdata);
9731 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9733 * When we have a revoked data, and we
9734 * retransmit it, then we clear the revoked
9735 * flag since this flag dictates if we
9736 * subtracted from the fs
9738 if (data_list[i]->rec.data.chunk_was_revoked) {
9739 /* Deflate the cwnd */
9740 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9741 data_list[i]->rec.data.chunk_was_revoked = 0;
9743 data_list[i]->snd_count++;
9744 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9745 /* record the time */
9746 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9747 if (data_list[i]->book_size_scale) {
9749 * need to double the book size on
9752 data_list[i]->book_size_scale = 0;
9754 * Since we double the booksize, we
9755 * must also double the output queue
9756 * size, since this get shrunk when
9757 * we free by this amount.
9759 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9760 data_list[i]->book_size *= 2;
9764 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9765 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9766 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9768 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9769 (uint32_t) (data_list[i]->send_size +
9770 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9772 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9773 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9774 data_list[i]->whoTo->flight_size,
9775 data_list[i]->book_size,
9776 (uintptr_t) data_list[i]->whoTo,
9777 data_list[i]->rec.data.TSN_seq);
9779 sctp_flight_size_increase(data_list[i]);
9780 sctp_total_flight_increase(stcb, data_list[i]);
9781 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9782 /* SWS sender side engages */
9783 asoc->peers_rwnd = 0;
9786 (data_list[i]->rec.data.doing_fast_retransmit)) {
9787 SCTP_STAT_INCR(sctps_sendfastretrans);
9788 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9789 (tmr_started == 0)) {
9791 * ok we just fast-retrans'd
9792 * the lowest TSN, i.e the
9793 * first on the list. In
9794 * this case we want to give
9795 * some more time to get a
9796 * SACK back without a
9799 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9800 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9801 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9805 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9806 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9808 #ifdef SCTP_AUDITING_ENABLED
9809 sctp_auditing(21, inp, stcb, NULL);
9815 if (asoc->sent_queue_retran_cnt <= 0) {
9816 /* all done we have no more to retran */
9817 asoc->sent_queue_retran_cnt = 0;
9821 /* No more room in rwnd */
9824 /* stop the for loop here. we sent out a packet */
9831 sctp_timer_validation(struct sctp_inpcb *inp,
9832 struct sctp_tcb *stcb,
9833 struct sctp_association *asoc)
9835 struct sctp_nets *net;
9837 /* Validate that a timer is running somewhere */
9838 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9839 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9840 /* Here is a timer */
9844 SCTP_TCB_LOCK_ASSERT(stcb);
9845 /* Gak, we did not have a timer somewhere */
9846 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9847 if (asoc->alternate) {
9848 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9850 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9856 sctp_chunk_output(struct sctp_inpcb *inp,
9857 struct sctp_tcb *stcb,
9860 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9866 * Ok this is the generic chunk service queue. we must do the
9868 * - See if there are retransmits pending, if so we must
9870 * - Service the stream queue that is next, moving any
9871 * message (note I must get a complete message i.e.
9872 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9874 * - Check to see if the cwnd/rwnd allows any output, if so we
9875 * go ahead and fomulate and send the low level chunks. Making sure
9876 * to combine any control in the control chunk queue also.
9878 struct sctp_association *asoc;
9879 struct sctp_nets *net;
9880 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9881 unsigned int burst_cnt = 0;
9885 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9888 unsigned int tot_frs = 0;
9891 /* The Nagle algorithm is only applied when handling a send call. */
9892 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9893 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9901 SCTP_TCB_LOCK_ASSERT(stcb);
9903 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9905 if ((un_sent <= 0) &&
9906 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9907 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9908 (asoc->sent_queue_retran_cnt == 0)) {
9909 /* Nothing to do unless there is something to be sent left */
9913 * Do we have something to send, data or control AND a sack timer
9914 * running, if so piggy-back the sack.
9916 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9917 sctp_send_sack(stcb, so_locked);
9918 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9920 while (asoc->sent_queue_retran_cnt) {
9922 * Ok, it is retransmission time only, we send out only ONE
9923 * packet with a single call off to the retran code.
9925 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9927 * Special hook for handling cookiess discarded
9928 * by peer that carried data. Send cookie-ack only
9929 * and then the next call with get the retran's.
9931 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9933 &now, &now_filled, frag_point, so_locked);
9935 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9936 /* if its not from a HB then do it */
9938 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9944 * its from any other place, we don't allow retran
9945 * output (only control)
9950 /* Can't send anymore */
9952 * now lets push out control by calling med-level
9953 * output once. this assures that we WILL send HB's
9956 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9958 &now, &now_filled, frag_point, so_locked);
9959 #ifdef SCTP_AUDITING_ENABLED
9960 sctp_auditing(8, inp, stcb, NULL);
9962 sctp_timer_validation(inp, stcb, asoc);
9967 * The count was off.. retran is not happening so do
9968 * the normal retransmission.
9970 #ifdef SCTP_AUDITING_ENABLED
9971 sctp_auditing(9, inp, stcb, NULL);
9973 if (ret == SCTP_RETRAN_EXIT) {
9978 if (from_where == SCTP_OUTPUT_FROM_T3) {
9979 /* Only one transmission allowed out of a timeout */
9980 #ifdef SCTP_AUDITING_ENABLED
9981 sctp_auditing(10, inp, stcb, NULL);
9983 /* Push out any control */
9984 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9985 &now, &now_filled, frag_point, so_locked);
9988 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9989 /* Hit FR burst limit */
9992 if ((num_out == 0) && (ret == 0)) {
9993 /* No more retrans to send */
9997 #ifdef SCTP_AUDITING_ENABLED
9998 sctp_auditing(12, inp, stcb, NULL);
10000 /* Check for bad destinations, if they exist move chunks around. */
10001 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10002 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10004 * if possible move things off of this address we
10005 * still may send below due to the dormant state but
10006 * we try to find an alternate address to send to
10007 * and if we have one we move all queued data on the
10008 * out wheel to this alternate address.
10010 if (net->ref_count > 1)
10011 sctp_move_chunks_from_net(stcb, net);
10014 * if ((asoc->sat_network) || (net->addr_is_local))
10015 * { burst_limit = asoc->max_burst *
10016 * SCTP_SAT_NETWORK_BURST_INCR; }
10018 if (asoc->max_burst > 0) {
10019 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10020 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10022 * JRS - Use the congestion
10023 * control given in the
10024 * congestion control module
10026 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10028 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10030 SCTP_STAT_INCR(sctps_maxburstqueued);
10032 net->fast_retran_ip = 0;
10034 if (net->flight_size == 0) {
10036 * Should be decaying the
10048 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10049 &reason_code, 0, from_where,
10050 &now, &now_filled, frag_point, so_locked);
10052 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10053 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10054 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10056 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10057 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10058 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10062 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10064 tot_out += num_out;
10066 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10067 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10068 if (num_out == 0) {
10069 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10074 * When the Nagle algorithm is used, look at how
10075 * much is unsent, then if its smaller than an MTU
10076 * and we have data in flight we stop, except if we
10077 * are handling a fragmented user message.
10079 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10080 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10081 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10082 (stcb->asoc.total_flight > 0) &&
10083 ((stcb->asoc.locked_on_sending == NULL) ||
10084 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10088 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10089 TAILQ_EMPTY(&asoc->send_queue) &&
10090 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10091 /* Nothing left to send */
10094 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10095 /* Nothing left to send */
10098 } while (num_out &&
10099 ((asoc->max_burst == 0) ||
10100 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10101 (burst_cnt < asoc->max_burst)));
10103 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10104 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10105 SCTP_STAT_INCR(sctps_maxburstqueued);
10106 asoc->burst_limit_applied = 1;
10107 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10108 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10111 asoc->burst_limit_applied = 0;
10114 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10115 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10117 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10121 * Now we need to clean up the control chunk chain if a ECNE is on
10122 * it. It must be marked as UNSENT again so next call will continue
10123 * to send it until such time that we get a CWR, to remove it.
10125 if (stcb->asoc.ecn_echo_cnt_onq)
10126 sctp_fix_ecn_echo(asoc);
10133 struct sctp_inpcb *inp,
10135 struct sockaddr *addr,
10136 struct mbuf *control,
10141 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10144 if (inp->sctp_socket == NULL) {
10145 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10148 return (sctp_sosend(inp->sctp_socket,
10150 (struct uio *)NULL,
10158 send_forward_tsn(struct sctp_tcb *stcb,
10159 struct sctp_association *asoc)
10161 struct sctp_tmit_chunk *chk;
10162 struct sctp_forward_tsn_chunk *fwdtsn;
10163 uint32_t advance_peer_ack_point;
10165 SCTP_TCB_LOCK_ASSERT(stcb);
10166 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10167 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10168 /* mark it to unsent */
10169 chk->sent = SCTP_DATAGRAM_UNSENT;
10170 chk->snd_count = 0;
10171 /* Do we correct its output location? */
10173 sctp_free_remote_addr(chk->whoTo);
10176 goto sctp_fill_in_rest;
10179 /* Ok if we reach here we must build one */
10180 sctp_alloc_a_chunk(stcb, chk);
10184 asoc->fwd_tsn_cnt++;
10185 chk->copy_by_ref = 0;
10186 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10187 chk->rec.chunk_id.can_take_data = 0;
10191 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10192 if (chk->data == NULL) {
10193 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10196 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10197 chk->sent = SCTP_DATAGRAM_UNSENT;
10198 chk->snd_count = 0;
10199 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10200 asoc->ctrl_queue_cnt++;
10203 * Here we go through and fill out the part that deals with
10204 * stream/seq of the ones we skip.
10206 SCTP_BUF_LEN(chk->data) = 0;
10208 struct sctp_tmit_chunk *at, *tp1, *last;
10209 struct sctp_strseq *strseq;
10210 unsigned int cnt_of_space, i, ovh;
10211 unsigned int space_needed;
10212 unsigned int cnt_of_skipped = 0;
10214 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10215 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10216 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10217 /* no more to look at */
10220 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10221 /* We don't report these */
10226 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10227 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10229 cnt_of_space = M_TRAILINGSPACE(chk->data);
10231 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10232 ovh = SCTP_MIN_OVERHEAD;
10234 ovh = SCTP_MIN_V4_OVERHEAD;
10236 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10237 /* trim to a mtu size */
10238 cnt_of_space = asoc->smallest_mtu - ovh;
10240 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10241 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10242 0xff, 0, cnt_of_skipped,
10243 asoc->advanced_peer_ack_point);
10246 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10247 if (cnt_of_space < space_needed) {
10249 * ok we must trim down the chunk by lowering the
10250 * advance peer ack point.
10252 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10253 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10254 0xff, 0xff, cnt_of_space,
10257 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10258 cnt_of_skipped /= sizeof(struct sctp_strseq);
10260 * Go through and find the TSN that will be the one
10263 at = TAILQ_FIRST(&asoc->sent_queue);
10265 for (i = 0; i < cnt_of_skipped; i++) {
10266 tp1 = TAILQ_NEXT(at, sctp_next);
10273 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10274 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10275 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10276 asoc->advanced_peer_ack_point);
10280 * last now points to last one I can report, update
10284 advance_peer_ack_point = last->rec.data.TSN_seq;
10285 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10286 cnt_of_skipped * sizeof(struct sctp_strseq);
10288 chk->send_size = space_needed;
10289 /* Setup the chunk */
10290 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10291 fwdtsn->ch.chunk_length = htons(chk->send_size);
10292 fwdtsn->ch.chunk_flags = 0;
10293 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10294 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10295 SCTP_BUF_LEN(chk->data) = chk->send_size;
10298 * Move pointer to after the fwdtsn and transfer to the
10301 strseq = (struct sctp_strseq *)fwdtsn;
10303 * Now populate the strseq list. This is done blindly
10304 * without pulling out duplicate stream info. This is
10305 * inefficent but won't harm the process since the peer will
10306 * look at these in sequence and will thus release anything.
10307 * It could mean we exceed the PMTU and chop off some that
10308 * we could have included.. but this is unlikely (aka 1432/4
10309 * would mean 300+ stream seq's would have to be reported in
10310 * one FWD-TSN. With a bit of work we can later FIX this to
10311 * optimize and pull out duplcates.. but it does add more
10312 * overhead. So for now... not!
10314 at = TAILQ_FIRST(&asoc->sent_queue);
10315 for (i = 0; i < cnt_of_skipped; i++) {
10316 tp1 = TAILQ_NEXT(at, sctp_next);
10319 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10320 /* We don't report these */
10325 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10326 at->rec.data.fwd_tsn_cnt = 0;
10328 strseq->stream = ntohs(at->rec.data.stream_number);
10329 strseq->sequence = ntohs(at->rec.data.stream_seq);
10338 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10339 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10345 * Queue up a SACK or NR-SACK in the control queue.
10346 * We must first check to see if a SACK or NR-SACK is
10347 * somehow on the control queue.
10348 * If so, we will take and and remove the old one.
10350 struct sctp_association *asoc;
10351 struct sctp_tmit_chunk *chk, *a_chk;
10352 struct sctp_sack_chunk *sack;
10353 struct sctp_nr_sack_chunk *nr_sack;
10354 struct sctp_gap_ack_block *gap_descriptor;
10355 struct sack_track *selector;
10360 int limit_reached = 0;
10361 unsigned int i, siz, j;
10362 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10365 uint32_t highest_tsn;
10370 if (stcb->asoc.nrsack_supported == 1) {
10371 type = SCTP_NR_SELECTIVE_ACK;
10373 type = SCTP_SELECTIVE_ACK;
10376 asoc = &stcb->asoc;
10377 SCTP_TCB_LOCK_ASSERT(stcb);
10378 if (asoc->last_data_chunk_from == NULL) {
10379 /* Hmm we never received anything */
10382 sctp_slide_mapping_arrays(stcb);
10383 sctp_set_rwnd(stcb, asoc);
10384 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10385 if (chk->rec.chunk_id.id == type) {
10386 /* Hmm, found a sack already on queue, remove it */
10387 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10388 asoc->ctrl_queue_cnt--;
10391 sctp_m_freem(a_chk->data);
10392 a_chk->data = NULL;
10394 if (a_chk->whoTo) {
10395 sctp_free_remote_addr(a_chk->whoTo);
10396 a_chk->whoTo = NULL;
10401 if (a_chk == NULL) {
10402 sctp_alloc_a_chunk(stcb, a_chk);
10403 if (a_chk == NULL) {
10404 /* No memory so we drop the idea, and set a timer */
10405 if (stcb->asoc.delayed_ack) {
10406 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10407 stcb->sctp_ep, stcb, NULL,
10408 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10409 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10410 stcb->sctp_ep, stcb, NULL);
10412 stcb->asoc.send_sack = 1;
10416 a_chk->copy_by_ref = 0;
10417 a_chk->rec.chunk_id.id = type;
10418 a_chk->rec.chunk_id.can_take_data = 1;
10420 /* Clear our pkt counts */
10421 asoc->data_pkts_seen = 0;
10424 a_chk->asoc = asoc;
10425 a_chk->snd_count = 0;
10426 a_chk->send_size = 0; /* fill in later */
10427 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10428 a_chk->whoTo = NULL;
10430 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10432 * Ok, the destination for the SACK is unreachable, lets see if
10433 * we can select an alternate to asoc->last_data_chunk_from
10435 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10436 if (a_chk->whoTo == NULL) {
10437 /* Nope, no alternate */
10438 a_chk->whoTo = asoc->last_data_chunk_from;
10441 a_chk->whoTo = asoc->last_data_chunk_from;
10443 if (a_chk->whoTo) {
10444 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10446 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10447 highest_tsn = asoc->highest_tsn_inside_map;
10449 highest_tsn = asoc->highest_tsn_inside_nr_map;
10451 if (highest_tsn == asoc->cumulative_tsn) {
10453 if (type == SCTP_SELECTIVE_ACK) {
10454 space_req = sizeof(struct sctp_sack_chunk);
10456 space_req = sizeof(struct sctp_nr_sack_chunk);
10459 /* gaps get a cluster */
10460 space_req = MCLBYTES;
10462 /* Ok now lets formulate a MBUF with our sack */
10463 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10464 if ((a_chk->data == NULL) ||
10465 (a_chk->whoTo == NULL)) {
10466 /* rats, no mbuf memory */
10468 /* was a problem with the destination */
10469 sctp_m_freem(a_chk->data);
10470 a_chk->data = NULL;
10472 sctp_free_a_chunk(stcb, a_chk, so_locked);
10473 /* sa_ignore NO_NULL_CHK */
10474 if (stcb->asoc.delayed_ack) {
10475 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10476 stcb->sctp_ep, stcb, NULL,
10477 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10478 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10479 stcb->sctp_ep, stcb, NULL);
10481 stcb->asoc.send_sack = 1;
10485 /* ok, lets go through and fill it in */
10486 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10487 space = M_TRAILINGSPACE(a_chk->data);
10488 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10489 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10491 limit = mtod(a_chk->data, caddr_t);
10496 if ((asoc->sctp_cmt_on_off > 0) &&
10497 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10499 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10500 * received, then set high bit to 1, else 0. Reset
10503 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10504 asoc->cmt_dac_pkts_rcvd = 0;
10506 #ifdef SCTP_ASOCLOG_OF_TSNS
10507 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10508 stcb->asoc.cumack_log_atsnt++;
10509 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10510 stcb->asoc.cumack_log_atsnt = 0;
10513 /* reset the readers interpretation */
10514 stcb->freed_by_sorcv_sincelast = 0;
10516 if (type == SCTP_SELECTIVE_ACK) {
10517 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10519 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10520 if (highest_tsn > asoc->mapping_array_base_tsn) {
10521 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10523 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10527 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10528 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10529 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10530 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10532 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10536 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10539 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10541 if (((type == SCTP_SELECTIVE_ACK) &&
10542 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10543 ((type == SCTP_NR_SELECTIVE_ACK) &&
10544 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10545 /* we have a gap .. maybe */
10546 for (i = 0; i < siz; i++) {
10547 tsn_map = asoc->mapping_array[i];
10548 if (type == SCTP_SELECTIVE_ACK) {
10549 tsn_map |= asoc->nr_mapping_array[i];
10553 * Clear all bits corresponding to TSNs
10554 * smaller or equal to the cumulative TSN.
10556 tsn_map &= (~0 << (1 - offset));
10558 selector = &sack_array[tsn_map];
10559 if (mergeable && selector->right_edge) {
10561 * Backup, left and right edges were ok to
10567 if (selector->num_entries == 0)
10570 for (j = 0; j < selector->num_entries; j++) {
10571 if (mergeable && selector->right_edge) {
10573 * do a merge by NOT setting
10579 * no merge, set the left
10583 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10585 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10588 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10594 if (selector->left_edge) {
10598 if (limit_reached) {
10599 /* Reached the limit stop */
10605 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10606 (limit_reached == 0)) {
10610 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10611 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10613 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10616 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10619 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10621 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10622 /* we have a gap .. maybe */
10623 for (i = 0; i < siz; i++) {
10624 tsn_map = asoc->nr_mapping_array[i];
10627 * Clear all bits corresponding to
10628 * TSNs smaller or equal to the
10631 tsn_map &= (~0 << (1 - offset));
10633 selector = &sack_array[tsn_map];
10634 if (mergeable && selector->right_edge) {
10636 * Backup, left and right edges were
10639 num_nr_gap_blocks--;
10642 if (selector->num_entries == 0)
10645 for (j = 0; j < selector->num_entries; j++) {
10646 if (mergeable && selector->right_edge) {
10648 * do a merge by NOT
10655 * no merge, set the
10659 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10661 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10662 num_nr_gap_blocks++;
10664 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10670 if (selector->left_edge) {
10674 if (limit_reached) {
10675 /* Reached the limit stop */
10682 /* now we must add any dups we are going to report. */
10683 if ((limit_reached == 0) && (asoc->numduptsns)) {
10684 dup = (uint32_t *) gap_descriptor;
10685 for (i = 0; i < asoc->numduptsns; i++) {
10686 *dup = htonl(asoc->dup_tsns[i]);
10689 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10694 asoc->numduptsns = 0;
10697 * now that the chunk is prepared queue it to the control chunk
10700 if (type == SCTP_SELECTIVE_ACK) {
10701 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10702 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10703 num_dups * sizeof(int32_t);
10704 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10705 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10706 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10707 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10708 sack->sack.num_dup_tsns = htons(num_dups);
10709 sack->ch.chunk_type = type;
10710 sack->ch.chunk_flags = flags;
10711 sack->ch.chunk_length = htons(a_chk->send_size);
10713 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10714 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10715 num_dups * sizeof(int32_t);
10716 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10717 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10718 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10719 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10720 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10721 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10722 nr_sack->nr_sack.reserved = 0;
10723 nr_sack->ch.chunk_type = type;
10724 nr_sack->ch.chunk_flags = flags;
10725 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10727 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10728 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10729 asoc->ctrl_queue_cnt++;
10730 asoc->send_sack = 0;
10731 SCTP_STAT_INCR(sctps_sendsacks);
10736 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10737 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10742 struct mbuf *m_abort, *m, *m_last;
10743 struct mbuf *m_out, *m_end = NULL;
10744 struct sctp_abort_chunk *abort;
10745 struct sctp_auth_chunk *auth = NULL;
10746 struct sctp_nets *net;
10748 uint32_t auth_offset = 0;
10749 uint16_t cause_len, chunk_len, padding_len;
10751 SCTP_TCB_LOCK_ASSERT(stcb);
10753 * Add an AUTH chunk, if chunk requires it and save the offset into
10754 * the chain for AUTH
10756 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10757 stcb->asoc.peer_auth_chunks)) {
10758 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10759 stcb, SCTP_ABORT_ASSOCIATION);
10760 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10764 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10765 if (m_abort == NULL) {
10767 sctp_m_freem(m_out);
10770 sctp_m_freem(operr);
10774 /* link in any error */
10775 SCTP_BUF_NEXT(m_abort) = operr;
10778 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10779 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10780 if (SCTP_BUF_NEXT(m) == NULL) {
10784 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10785 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10786 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10787 if (m_out == NULL) {
10788 /* NO Auth chunk prepended, so reserve space in front */
10789 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10792 /* Put AUTH chunk at the front of the chain */
10793 SCTP_BUF_NEXT(m_end) = m_abort;
10795 if (stcb->asoc.alternate) {
10796 net = stcb->asoc.alternate;
10798 net = stcb->asoc.primary_destination;
10800 /* Fill in the ABORT chunk header. */
10801 abort = mtod(m_abort, struct sctp_abort_chunk *);
10802 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10803 if (stcb->asoc.peer_vtag == 0) {
10804 /* This happens iff the assoc is in COOKIE-WAIT state. */
10805 vtag = stcb->asoc.my_vtag;
10806 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10808 vtag = stcb->asoc.peer_vtag;
10809 abort->ch.chunk_flags = 0;
10811 abort->ch.chunk_length = htons(chunk_len);
10812 /* Add padding, if necessary. */
10813 if (padding_len > 0) {
10814 if ((m_last == NULL) ||
10815 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10816 sctp_m_freem(m_out);
10820 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10821 (struct sockaddr *)&net->ro._l_addr,
10822 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10823 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10824 stcb->asoc.primary_destination->port, NULL,
10827 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10831 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10832 struct sctp_nets *net,
10835 /* formulate and SEND a SHUTDOWN-COMPLETE */
10836 struct mbuf *m_shutdown_comp;
10837 struct sctp_shutdown_complete_chunk *shutdown_complete;
10841 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10842 if (m_shutdown_comp == NULL) {
10846 if (reflect_vtag) {
10847 flags = SCTP_HAD_NO_TCB;
10848 vtag = stcb->asoc.my_vtag;
10851 vtag = stcb->asoc.peer_vtag;
10853 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10854 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10855 shutdown_complete->ch.chunk_flags = flags;
10856 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10857 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10858 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10859 (struct sockaddr *)&net->ro._l_addr,
10860 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10861 stcb->sctp_ep->sctp_lport, stcb->rport,
10865 SCTP_SO_NOT_LOCKED);
10866 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10871 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10872 struct sctphdr *sh, uint32_t vtag,
10873 uint8_t type, struct mbuf *cause,
10874 uint8_t mflowtype, uint32_t mflowid,
10875 uint32_t vrf_id, uint16_t port)
10877 struct mbuf *o_pak;
10879 struct sctphdr *shout;
10880 struct sctp_chunkhdr *ch;
10882 #if defined(INET) || defined(INET6)
10883 struct udphdr *udp;
10887 int len, cause_len, padding_len;
10890 struct sockaddr_in *src_sin, *dst_sin;
10895 struct sockaddr_in6 *src_sin6, *dst_sin6;
10896 struct ip6_hdr *ip6;
10900 /* Compute the length of the cause and add final padding. */
10902 if (cause != NULL) {
10903 struct mbuf *m_at, *m_last = NULL;
10905 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10906 if (SCTP_BUF_NEXT(m_at) == NULL)
10908 cause_len += SCTP_BUF_LEN(m_at);
10910 padding_len = cause_len % 4;
10911 if (padding_len != 0) {
10912 padding_len = 4 - padding_len;
10914 if (padding_len != 0) {
10915 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10916 sctp_m_freem(cause);
10923 /* Get an mbuf for the header. */
10924 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10925 switch (dst->sa_family) {
10928 len += sizeof(struct ip);
10933 len += sizeof(struct ip6_hdr);
10939 #if defined(INET) || defined(INET6)
10941 len += sizeof(struct udphdr);
10944 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
10945 if (mout == NULL) {
10947 sctp_m_freem(cause);
10951 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10952 SCTP_BUF_LEN(mout) = len;
10953 SCTP_BUF_NEXT(mout) = cause;
10954 mout->m_pkthdr.flowid = mflowid;
10955 M_HASHTYPE_SET(mout, mflowtype);
10962 switch (dst->sa_family) {
10965 src_sin = (struct sockaddr_in *)src;
10966 dst_sin = (struct sockaddr_in *)dst;
10967 ip = mtod(mout, struct ip *);
10968 ip->ip_v = IPVERSION;
10969 ip->ip_hl = (sizeof(struct ip) >> 2);
10971 ip->ip_id = ip_newid();
10973 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10975 ip->ip_p = IPPROTO_UDP;
10977 ip->ip_p = IPPROTO_SCTP;
10979 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10980 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10982 len = sizeof(struct ip);
10983 shout = (struct sctphdr *)((caddr_t)ip + len);
10988 src_sin6 = (struct sockaddr_in6 *)src;
10989 dst_sin6 = (struct sockaddr_in6 *)dst;
10990 ip6 = mtod(mout, struct ip6_hdr *);
10991 ip6->ip6_flow = htonl(0x60000000);
10992 if (V_ip6_auto_flowlabel) {
10993 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10995 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10997 ip6->ip6_nxt = IPPROTO_UDP;
10999 ip6->ip6_nxt = IPPROTO_SCTP;
11001 ip6->ip6_src = dst_sin6->sin6_addr;
11002 ip6->ip6_dst = src_sin6->sin6_addr;
11003 len = sizeof(struct ip6_hdr);
11004 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11009 shout = mtod(mout, struct sctphdr *);
11012 #if defined(INET) || defined(INET6)
11014 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11015 sctp_m_freem(mout);
11018 udp = (struct udphdr *)shout;
11019 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11020 udp->uh_dport = port;
11022 udp->uh_ulen = htons(sizeof(struct udphdr) +
11023 sizeof(struct sctphdr) +
11024 sizeof(struct sctp_chunkhdr) +
11025 cause_len + padding_len);
11026 len += sizeof(struct udphdr);
11027 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11032 shout->src_port = sh->dest_port;
11033 shout->dest_port = sh->src_port;
11034 shout->checksum = 0;
11036 shout->v_tag = htonl(vtag);
11038 shout->v_tag = sh->v_tag;
11040 len += sizeof(struct sctphdr);
11041 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11042 ch->chunk_type = type;
11044 ch->chunk_flags = 0;
11046 ch->chunk_flags = SCTP_HAD_NO_TCB;
11048 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11049 len += sizeof(struct sctp_chunkhdr);
11050 len += cause_len + padding_len;
11052 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11053 sctp_m_freem(mout);
11056 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11057 switch (dst->sa_family) {
11062 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11067 ip->ip_len = htons(len);
11069 #if defined(SCTP_WITH_NO_CSUM)
11070 SCTP_STAT_INCR(sctps_sendnocrc);
11072 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11073 SCTP_STAT_INCR(sctps_sendswcrc);
11076 SCTP_ENABLE_UDP_CSUM(o_pak);
11079 #if defined(SCTP_WITH_NO_CSUM)
11080 SCTP_STAT_INCR(sctps_sendnocrc);
11082 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11083 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11084 SCTP_STAT_INCR(sctps_sendhwcrc);
11087 #ifdef SCTP_PACKET_LOGGING
11088 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11089 sctp_packet_log(o_pak);
11092 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11097 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11099 #if defined(SCTP_WITH_NO_CSUM)
11100 SCTP_STAT_INCR(sctps_sendnocrc);
11102 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11103 SCTP_STAT_INCR(sctps_sendswcrc);
11105 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11106 udp->uh_sum = 0xffff;
11109 #if defined(SCTP_WITH_NO_CSUM)
11110 SCTP_STAT_INCR(sctps_sendnocrc);
11112 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11113 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11114 SCTP_STAT_INCR(sctps_sendhwcrc);
11117 #ifdef SCTP_PACKET_LOGGING
11118 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11119 sctp_packet_log(o_pak);
11122 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11126 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11128 sctp_m_freem(mout);
11129 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11132 SCTP_STAT_INCR(sctps_sendpackets);
11133 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11134 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11139 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11140 struct sctphdr *sh,
11141 uint8_t mflowtype, uint32_t mflowid,
11142 uint32_t vrf_id, uint16_t port)
11144 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11145 mflowtype, mflowid,
11150 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11151 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11156 struct sctp_tmit_chunk *chk;
11157 struct sctp_heartbeat_chunk *hb;
11158 struct timeval now;
11160 SCTP_TCB_LOCK_ASSERT(stcb);
11164 (void)SCTP_GETTIME_TIMEVAL(&now);
11165 switch (net->ro._l_addr.sa.sa_family) {
11177 sctp_alloc_a_chunk(stcb, chk);
11179 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11182 chk->copy_by_ref = 0;
11183 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11184 chk->rec.chunk_id.can_take_data = 1;
11186 chk->asoc = &stcb->asoc;
11187 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11189 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11190 if (chk->data == NULL) {
11191 sctp_free_a_chunk(stcb, chk, so_locked);
11194 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11195 SCTP_BUF_LEN(chk->data) = chk->send_size;
11196 chk->sent = SCTP_DATAGRAM_UNSENT;
11197 chk->snd_count = 0;
11199 atomic_add_int(&chk->whoTo->ref_count, 1);
11200 /* Now we have a mbuf that we can fill in with the details */
11201 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11202 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11203 /* fill out chunk header */
11204 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11205 hb->ch.chunk_flags = 0;
11206 hb->ch.chunk_length = htons(chk->send_size);
11207 /* Fill out hb parameter */
11208 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11209 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11210 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11211 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11212 /* Did our user request this one, put it in */
11213 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11214 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11215 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11217 * we only take from the entropy pool if the address is not
11220 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11221 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11223 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11224 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11226 switch (net->ro._l_addr.sa.sa_family) {
11229 memcpy(hb->heartbeat.hb_info.address,
11230 &net->ro._l_addr.sin.sin_addr,
11231 sizeof(net->ro._l_addr.sin.sin_addr));
11236 memcpy(hb->heartbeat.hb_info.address,
11237 &net->ro._l_addr.sin6.sin6_addr,
11238 sizeof(net->ro._l_addr.sin6.sin6_addr));
11245 net->hb_responded = 0;
11246 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11247 stcb->asoc.ctrl_queue_cnt++;
11248 SCTP_STAT_INCR(sctps_sendheartbeat);
11253 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11256 struct sctp_association *asoc;
11257 struct sctp_ecne_chunk *ecne;
11258 struct sctp_tmit_chunk *chk;
11263 asoc = &stcb->asoc;
11264 SCTP_TCB_LOCK_ASSERT(stcb);
11265 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11266 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11267 /* found a previous ECN_ECHO update it if needed */
11268 uint32_t cnt, ctsn;
11270 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11271 ctsn = ntohl(ecne->tsn);
11272 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11273 ecne->tsn = htonl(high_tsn);
11274 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11276 cnt = ntohl(ecne->num_pkts_since_cwr);
11278 ecne->num_pkts_since_cwr = htonl(cnt);
11282 /* nope could not find one to update so we must build one */
11283 sctp_alloc_a_chunk(stcb, chk);
11287 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11288 chk->copy_by_ref = 0;
11289 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11290 chk->rec.chunk_id.can_take_data = 0;
11292 chk->asoc = &stcb->asoc;
11293 chk->send_size = sizeof(struct sctp_ecne_chunk);
11294 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11295 if (chk->data == NULL) {
11296 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11299 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11300 SCTP_BUF_LEN(chk->data) = chk->send_size;
11301 chk->sent = SCTP_DATAGRAM_UNSENT;
11302 chk->snd_count = 0;
11304 atomic_add_int(&chk->whoTo->ref_count, 1);
11306 stcb->asoc.ecn_echo_cnt_onq++;
11307 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11308 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11309 ecne->ch.chunk_flags = 0;
11310 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11311 ecne->tsn = htonl(high_tsn);
11312 ecne->num_pkts_since_cwr = htonl(1);
11313 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11314 asoc->ctrl_queue_cnt++;
11318 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11319 struct mbuf *m, int len, int iphlen, int bad_crc)
11321 struct sctp_association *asoc;
11322 struct sctp_pktdrop_chunk *drp;
11323 struct sctp_tmit_chunk *chk;
11329 struct sctp_chunkhdr *ch, chunk_buf;
11330 unsigned int chk_length;
11335 asoc = &stcb->asoc;
11336 SCTP_TCB_LOCK_ASSERT(stcb);
11337 if (asoc->pktdrop_supported == 0) {
11339 * peer must declare support before I send one.
11343 if (stcb->sctp_socket == NULL) {
11346 sctp_alloc_a_chunk(stcb, chk);
11350 chk->copy_by_ref = 0;
11351 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11352 chk->rec.chunk_id.can_take_data = 1;
11355 chk->send_size = len;
11356 /* Validate that we do not have an ABORT in here. */
11357 offset = iphlen + sizeof(struct sctphdr);
11358 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11359 sizeof(*ch), (uint8_t *) & chunk_buf);
11360 while (ch != NULL) {
11361 chk_length = ntohs(ch->chunk_length);
11362 if (chk_length < sizeof(*ch)) {
11363 /* break to abort land */
11366 switch (ch->chunk_type) {
11367 case SCTP_PACKET_DROPPED:
11368 case SCTP_ABORT_ASSOCIATION:
11369 case SCTP_INITIATION_ACK:
11371 * We don't respond with an PKT-DROP to an ABORT
11372 * or PKT-DROP. We also do not respond to an
11373 * INIT-ACK, because we can't know if the initiation
11374 * tag is correct or not.
11376 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11381 offset += SCTP_SIZE32(chk_length);
11382 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11383 sizeof(*ch), (uint8_t *) & chunk_buf);
11386 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11387 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11389 * only send 1 mtu worth, trim off the excess on the end.
11392 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11395 chk->asoc = &stcb->asoc;
11396 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11397 if (chk->data == NULL) {
11399 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11402 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11403 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11405 sctp_m_freem(chk->data);
11409 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11410 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11411 chk->book_size_scale = 0;
11413 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11414 drp->trunc_len = htons(fullsz);
11416 * Len is already adjusted to size minus overhead above take
11417 * out the pkt_drop chunk itself from it.
11419 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11420 len = chk->send_size;
11422 /* no truncation needed */
11423 drp->ch.chunk_flags = 0;
11424 drp->trunc_len = htons(0);
11427 drp->ch.chunk_flags |= SCTP_BADCRC;
11429 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11430 SCTP_BUF_LEN(chk->data) = chk->send_size;
11431 chk->sent = SCTP_DATAGRAM_UNSENT;
11432 chk->snd_count = 0;
11434 /* we should hit here */
11436 atomic_add_int(&chk->whoTo->ref_count, 1);
11440 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11441 drp->ch.chunk_length = htons(chk->send_size);
11442 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11446 drp->bottle_bw = htonl(spc);
11447 if (asoc->my_rwnd) {
11448 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11449 asoc->size_on_all_streams +
11450 asoc->my_rwnd_control_len +
11451 stcb->sctp_socket->so_rcv.sb_cc);
11454 * If my rwnd is 0, possibly from mbuf depletion as well as
11455 * space used, tell the peer there is NO space aka onq == bw
11457 drp->current_onq = htonl(spc);
11461 m_copydata(m, iphlen, len, (caddr_t)datap);
11462 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11463 asoc->ctrl_queue_cnt++;
11467 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11469 struct sctp_association *asoc;
11470 struct sctp_cwr_chunk *cwr;
11471 struct sctp_tmit_chunk *chk;
11473 SCTP_TCB_LOCK_ASSERT(stcb);
11477 asoc = &stcb->asoc;
11478 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11479 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11481 * found a previous CWR queued to same destination
11482 * update it if needed
11486 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11487 ctsn = ntohl(cwr->tsn);
11488 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11489 cwr->tsn = htonl(high_tsn);
11491 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11492 /* Make sure override is carried */
11493 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11498 sctp_alloc_a_chunk(stcb, chk);
11502 chk->copy_by_ref = 0;
11503 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11504 chk->rec.chunk_id.can_take_data = 1;
11506 chk->asoc = &stcb->asoc;
11507 chk->send_size = sizeof(struct sctp_cwr_chunk);
11508 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11509 if (chk->data == NULL) {
11510 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11513 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11514 SCTP_BUF_LEN(chk->data) = chk->send_size;
11515 chk->sent = SCTP_DATAGRAM_UNSENT;
11516 chk->snd_count = 0;
11518 atomic_add_int(&chk->whoTo->ref_count, 1);
11519 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11520 cwr->ch.chunk_type = SCTP_ECN_CWR;
11521 cwr->ch.chunk_flags = override;
11522 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11523 cwr->tsn = htonl(high_tsn);
11524 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11525 asoc->ctrl_queue_cnt++;
11529 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11530 int number_entries, uint16_t * list,
11531 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11533 uint16_t len, old_len, i;
11534 struct sctp_stream_reset_out_request *req_out;
11535 struct sctp_chunkhdr *ch;
11537 ch = mtod(chk->data, struct sctp_chunkhdr *);
11538 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11540 /* get to new offset for the param. */
11541 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11542 /* now how long will this param be? */
11543 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11544 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11545 req_out->ph.param_length = htons(len);
11546 req_out->request_seq = htonl(seq);
11547 req_out->response_seq = htonl(resp_seq);
11548 req_out->send_reset_at_tsn = htonl(last_sent);
11549 if (number_entries) {
11550 for (i = 0; i < number_entries; i++) {
11551 req_out->list_of_streams[i] = htons(list[i]);
11554 if (SCTP_SIZE32(len) > len) {
11556 * Need to worry about the pad we may end up adding to the
11557 * end. This is easy since the struct is either aligned to 4
11558 * bytes or 2 bytes off.
11560 req_out->list_of_streams[number_entries] = 0;
11562 /* now fix the chunk length */
11563 ch->chunk_length = htons(len + old_len);
11564 chk->book_size = len + old_len;
11565 chk->book_size_scale = 0;
11566 chk->send_size = SCTP_SIZE32(chk->book_size);
11567 SCTP_BUF_LEN(chk->data) = chk->send_size;
11572 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11573 int number_entries, uint16_t * list,
11576 uint16_t len, old_len, i;
11577 struct sctp_stream_reset_in_request *req_in;
11578 struct sctp_chunkhdr *ch;
11580 ch = mtod(chk->data, struct sctp_chunkhdr *);
11581 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11583 /* get to new offset for the param. */
11584 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11585 /* now how long will this param be? */
11586 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11587 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11588 req_in->ph.param_length = htons(len);
11589 req_in->request_seq = htonl(seq);
11590 if (number_entries) {
11591 for (i = 0; i < number_entries; i++) {
11592 req_in->list_of_streams[i] = htons(list[i]);
11595 if (SCTP_SIZE32(len) > len) {
11597 * Need to worry about the pad we may end up adding to the
11598 * end. This is easy since the struct is either aligned to 4
11599 * bytes or 2 bytes off.
11601 req_in->list_of_streams[number_entries] = 0;
11603 /* now fix the chunk length */
11604 ch->chunk_length = htons(len + old_len);
11605 chk->book_size = len + old_len;
11606 chk->book_size_scale = 0;
11607 chk->send_size = SCTP_SIZE32(chk->book_size);
11608 SCTP_BUF_LEN(chk->data) = chk->send_size;
11613 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11616 uint16_t len, old_len;
11617 struct sctp_stream_reset_tsn_request *req_tsn;
11618 struct sctp_chunkhdr *ch;
11620 ch = mtod(chk->data, struct sctp_chunkhdr *);
11621 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11623 /* get to new offset for the param. */
11624 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11625 /* now how long will this param be? */
11626 len = sizeof(struct sctp_stream_reset_tsn_request);
11627 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11628 req_tsn->ph.param_length = htons(len);
11629 req_tsn->request_seq = htonl(seq);
11631 /* now fix the chunk length */
11632 ch->chunk_length = htons(len + old_len);
11633 chk->send_size = len + old_len;
11634 chk->book_size = SCTP_SIZE32(chk->send_size);
11635 chk->book_size_scale = 0;
11636 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11641 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11642 uint32_t resp_seq, uint32_t result)
11644 uint16_t len, old_len;
11645 struct sctp_stream_reset_response *resp;
11646 struct sctp_chunkhdr *ch;
11648 ch = mtod(chk->data, struct sctp_chunkhdr *);
11649 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11651 /* get to new offset for the param. */
11652 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11653 /* now how long will this param be? */
11654 len = sizeof(struct sctp_stream_reset_response);
11655 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11656 resp->ph.param_length = htons(len);
11657 resp->response_seq = htonl(resp_seq);
11658 resp->result = ntohl(result);
11660 /* now fix the chunk length */
11661 ch->chunk_length = htons(len + old_len);
11662 chk->book_size = len + old_len;
11663 chk->book_size_scale = 0;
11664 chk->send_size = SCTP_SIZE32(chk->book_size);
11665 SCTP_BUF_LEN(chk->data) = chk->send_size;
11670 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11671 uint32_t resp_seq, uint32_t result,
11672 uint32_t send_una, uint32_t recv_next)
11674 uint16_t len, old_len;
11675 struct sctp_stream_reset_response_tsn *resp;
11676 struct sctp_chunkhdr *ch;
11678 ch = mtod(chk->data, struct sctp_chunkhdr *);
11679 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11681 /* get to new offset for the param. */
11682 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11683 /* now how long will this param be? */
11684 len = sizeof(struct sctp_stream_reset_response_tsn);
11685 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11686 resp->ph.param_length = htons(len);
11687 resp->response_seq = htonl(resp_seq);
11688 resp->result = htonl(result);
11689 resp->senders_next_tsn = htonl(send_una);
11690 resp->receivers_next_tsn = htonl(recv_next);
11692 /* now fix the chunk length */
11693 ch->chunk_length = htons(len + old_len);
11694 chk->book_size = len + old_len;
11695 chk->send_size = SCTP_SIZE32(chk->book_size);
11696 chk->book_size_scale = 0;
11697 SCTP_BUF_LEN(chk->data) = chk->send_size;
11702 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11706 uint16_t len, old_len;
11707 struct sctp_chunkhdr *ch;
11708 struct sctp_stream_reset_add_strm *addstr;
11710 ch = mtod(chk->data, struct sctp_chunkhdr *);
11711 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11713 /* get to new offset for the param. */
11714 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11715 /* now how long will this param be? */
11716 len = sizeof(struct sctp_stream_reset_add_strm);
11719 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11720 addstr->ph.param_length = htons(len);
11721 addstr->request_seq = htonl(seq);
11722 addstr->number_of_streams = htons(adding);
11723 addstr->reserved = 0;
11725 /* now fix the chunk length */
11726 ch->chunk_length = htons(len + old_len);
11727 chk->send_size = len + old_len;
11728 chk->book_size = SCTP_SIZE32(chk->send_size);
11729 chk->book_size_scale = 0;
11730 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11735 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11739 uint16_t len, old_len;
11740 struct sctp_chunkhdr *ch;
11741 struct sctp_stream_reset_add_strm *addstr;
11743 ch = mtod(chk->data, struct sctp_chunkhdr *);
11744 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11746 /* get to new offset for the param. */
11747 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11748 /* now how long will this param be? */
11749 len = sizeof(struct sctp_stream_reset_add_strm);
11751 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11752 addstr->ph.param_length = htons(len);
11753 addstr->request_seq = htonl(seq);
11754 addstr->number_of_streams = htons(adding);
11755 addstr->reserved = 0;
11757 /* now fix the chunk length */
11758 ch->chunk_length = htons(len + old_len);
11759 chk->send_size = len + old_len;
11760 chk->book_size = SCTP_SIZE32(chk->send_size);
11761 chk->book_size_scale = 0;
11762 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11767 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11768 uint16_t number_entries, uint16_t * list,
11769 uint8_t send_out_req,
11770 uint8_t send_in_req,
11771 uint8_t send_tsn_req,
11772 uint8_t add_stream,
11774 uint16_t adding_i, uint8_t peer_asked)
11777 struct sctp_association *asoc;
11778 struct sctp_tmit_chunk *chk;
11779 struct sctp_chunkhdr *ch;
11782 asoc = &stcb->asoc;
11783 if (asoc->stream_reset_outstanding) {
11785 * Already one pending, must get ACK back to clear the flag.
11787 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11790 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11791 (add_stream == 0)) {
11792 /* nothing to do */
11793 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11796 if (send_tsn_req && (send_out_req || send_in_req)) {
11797 /* error, can't do that */
11798 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11801 if (number_entries > (MCLBYTES -
11802 SCTP_MIN_OVERHEAD -
11803 sizeof(struct sctp_chunkhdr) -
11804 sizeof(struct sctp_stream_reset_out_request)) /
11805 sizeof(uint16_t)) {
11806 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11809 sctp_alloc_a_chunk(stcb, chk);
11811 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11814 chk->copy_by_ref = 0;
11815 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11816 chk->rec.chunk_id.can_take_data = 0;
11818 chk->asoc = &stcb->asoc;
11819 chk->book_size = sizeof(struct sctp_chunkhdr);
11820 chk->send_size = SCTP_SIZE32(chk->book_size);
11821 chk->book_size_scale = 0;
11823 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11824 if (chk->data == NULL) {
11825 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11826 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11829 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11831 /* setup chunk parameters */
11832 chk->sent = SCTP_DATAGRAM_UNSENT;
11833 chk->snd_count = 0;
11834 if (stcb->asoc.alternate) {
11835 chk->whoTo = stcb->asoc.alternate;
11837 chk->whoTo = stcb->asoc.primary_destination;
11839 atomic_add_int(&chk->whoTo->ref_count, 1);
11840 ch = mtod(chk->data, struct sctp_chunkhdr *);
11841 ch->chunk_type = SCTP_STREAM_RESET;
11842 ch->chunk_flags = 0;
11843 ch->chunk_length = htons(chk->book_size);
11844 SCTP_BUF_LEN(chk->data) = chk->send_size;
11846 seq = stcb->asoc.str_reset_seq_out;
11847 if (send_out_req) {
11848 sctp_add_stream_reset_out(chk, number_entries, list,
11849 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11850 asoc->stream_reset_out_is_outstanding = 1;
11852 asoc->stream_reset_outstanding++;
11854 if ((add_stream & 1) &&
11855 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11856 /* Need to allocate more */
11857 struct sctp_stream_out *oldstream;
11858 struct sctp_stream_queue_pending *sp, *nsp;
11861 #if defined(SCTP_DETAILED_STR_STATS)
11866 oldstream = stcb->asoc.strmout;
11867 /* get some more */
11868 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11869 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11871 if (stcb->asoc.strmout == NULL) {
11874 stcb->asoc.strmout = oldstream;
11875 /* Turn off the bit */
11876 x = add_stream & 0xfe;
11881 * Ok now we proceed with copying the old out stuff and
11882 * initializing the new stuff.
11884 SCTP_TCB_SEND_LOCK(stcb);
11885 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11886 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11887 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11888 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11889 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11890 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11891 stcb->asoc.strmout[i].stream_no = i;
11892 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11893 /* now anything on those queues? */
11894 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11895 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11896 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11898 /* Now move assoc pointers too */
11899 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11900 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11902 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11903 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11906 /* now the new streams */
11907 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11908 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11909 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11910 stcb->asoc.strmout[i].chunks_on_queues = 0;
11911 #if defined(SCTP_DETAILED_STR_STATS)
11912 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
11913 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
11914 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
11917 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
11918 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
11920 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11921 stcb->asoc.strmout[i].stream_no = i;
11922 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11923 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11925 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11926 SCTP_FREE(oldstream, SCTP_M_STRMO);
11927 SCTP_TCB_SEND_UNLOCK(stcb);
11930 if ((add_stream & 1) && (adding_o > 0)) {
11931 asoc->strm_pending_add_size = adding_o;
11932 asoc->peer_req_out = peer_asked;
11933 sctp_add_an_out_stream(chk, seq, adding_o);
11935 asoc->stream_reset_outstanding++;
11937 if ((add_stream & 2) && (adding_i > 0)) {
11938 sctp_add_an_in_stream(chk, seq, adding_i);
11940 asoc->stream_reset_outstanding++;
11943 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11945 asoc->stream_reset_outstanding++;
11947 if (send_tsn_req) {
11948 sctp_add_stream_reset_tsn(chk, seq);
11949 asoc->stream_reset_outstanding++;
11951 asoc->str_reset = chk;
11952 /* insert the chunk for sending */
11953 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11956 asoc->ctrl_queue_cnt++;
11957 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11962 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11963 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11964 uint8_t mflowtype, uint32_t mflowid,
11965 uint32_t vrf_id, uint16_t port)
11967 /* Don't respond to an ABORT with an ABORT. */
11968 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11970 sctp_m_freem(cause);
11973 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11974 mflowtype, mflowid,
11980 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11981 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11982 uint8_t mflowtype, uint32_t mflowid,
11983 uint32_t vrf_id, uint16_t port)
11985 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11986 mflowtype, mflowid,
11991 static struct mbuf *
11992 sctp_copy_resume(struct uio *uio,
11994 int user_marks_eor,
11997 struct mbuf **new_tail)
12001 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12002 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12004 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12007 *sndout = m_length(m, NULL);
12008 *new_tail = m_last(m);
12014 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12018 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12020 if (sp->data == NULL) {
12021 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12024 sp->tail_mbuf = m_last(sp->data);
12030 static struct sctp_stream_queue_pending *
12031 sctp_copy_it_in(struct sctp_tcb *stcb,
12032 struct sctp_association *asoc,
12033 struct sctp_sndrcvinfo *srcv,
12035 struct sctp_nets *net,
12037 int user_marks_eor,
12041 * This routine must be very careful in its work. Protocol
12042 * processing is up and running so care must be taken to spl...()
12043 * when you need to do something that may effect the stcb/asoc. The
12044 * sb is locked however. When data is copied the protocol processing
12045 * should be enabled since this is a slower operation...
12047 struct sctp_stream_queue_pending *sp = NULL;
12051 /* Now can we send this? */
12052 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12053 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12054 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12055 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12056 /* got data while shutting down */
12057 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12058 *error = ECONNRESET;
12061 sctp_alloc_a_strmoq(stcb, sp);
12063 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12068 sp->sender_all_done = 0;
12069 sp->sinfo_flags = srcv->sinfo_flags;
12070 sp->timetolive = srcv->sinfo_timetolive;
12071 sp->ppid = srcv->sinfo_ppid;
12072 sp->context = srcv->sinfo_context;
12073 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12075 sp->stream = srcv->sinfo_stream;
12076 sp->length = min(uio->uio_resid, max_send_len);
12077 if ((sp->length == (uint32_t) uio->uio_resid) &&
12078 ((user_marks_eor == 0) ||
12079 (srcv->sinfo_flags & SCTP_EOF) ||
12080 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12081 sp->msg_is_complete = 1;
12083 sp->msg_is_complete = 0;
12085 sp->sender_all_done = 0;
12086 sp->some_taken = 0;
12087 sp->put_last_out = 0;
12088 resv_in_first = sizeof(struct sctp_data_chunk);
12089 sp->data = sp->tail_mbuf = NULL;
12090 if (sp->length == 0) {
12094 if (srcv->sinfo_keynumber_valid) {
12095 sp->auth_keyid = srcv->sinfo_keynumber;
12097 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12099 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12100 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12101 sp->holds_key_ref = 1;
12103 *error = sctp_copy_one(sp, uio, resv_in_first);
12106 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12109 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12111 atomic_add_int(&sp->net->ref_count, 1);
12115 sctp_set_prsctp_policy(sp);
12123 sctp_sosend(struct socket *so,
12124 struct sockaddr *addr,
12127 struct mbuf *control,
12132 int error, use_sndinfo = 0;
12133 struct sctp_sndrcvinfo sndrcvninfo;
12134 struct sockaddr *addr_to_use;
12136 #if defined(INET) && defined(INET6)
12137 struct sockaddr_in sin;
12142 /* process cmsg snd/rcv info (maybe a assoc-id) */
12143 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12144 sizeof(sndrcvninfo))) {
12149 addr_to_use = addr;
12150 #if defined(INET) && defined(INET6)
12151 if ((addr) && (addr->sa_family == AF_INET6)) {
12152 struct sockaddr_in6 *sin6;
12154 sin6 = (struct sockaddr_in6 *)addr;
12155 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12156 in6_sin6_2_sin(&sin, sin6);
12157 addr_to_use = (struct sockaddr *)&sin;
12161 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12164 use_sndinfo ? &sndrcvninfo : NULL
12172 sctp_lower_sosend(struct socket *so,
12173 struct sockaddr *addr,
12175 struct mbuf *i_pak,
12176 struct mbuf *control,
12178 struct sctp_sndrcvinfo *srcv
12183 unsigned int sndlen = 0, max_len;
12185 struct mbuf *top = NULL;
12186 int queue_only = 0, queue_only_for_init = 0;
12187 int free_cnt_applied = 0;
12189 int now_filled = 0;
12190 unsigned int inqueue_bytes = 0;
12191 struct sctp_block_entry be;
12192 struct sctp_inpcb *inp;
12193 struct sctp_tcb *stcb = NULL;
12194 struct timeval now;
12195 struct sctp_nets *net;
12196 struct sctp_association *asoc;
12197 struct sctp_inpcb *t_inp;
12198 int user_marks_eor;
12199 int create_lock_applied = 0;
12200 int nagle_applies = 0;
12201 int some_on_control = 0;
12202 int got_all_of_the_send = 0;
12203 int hold_tcblock = 0;
12204 int non_blocking = 0;
12205 uint32_t local_add_more, local_soresv = 0;
12207 uint16_t sinfo_flags;
12208 sctp_assoc_t sinfo_assoc_id;
12215 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12217 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12220 SCTP_RELEASE_PKT(i_pak);
12224 if ((uio == NULL) && (i_pak == NULL)) {
12225 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12228 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12229 atomic_add_int(&inp->total_sends, 1);
12231 if (uio->uio_resid < 0) {
12232 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12235 sndlen = uio->uio_resid;
12237 top = SCTP_HEADER_TO_CHAIN(i_pak);
12238 sndlen = SCTP_HEADER_LEN(i_pak);
12240 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12243 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12244 (inp->sctp_socket->so_qlimit)) {
12245 /* The listener can NOT send */
12246 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12251 * Pre-screen address, if one is given the sin-len
12252 * must be set correctly!
12255 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12257 switch (raddr->sa.sa_family) {
12260 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12261 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12265 port = raddr->sin.sin_port;
12270 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12271 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12275 port = raddr->sin6.sin6_port;
12279 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12280 error = EAFNOSUPPORT;
12287 sinfo_flags = srcv->sinfo_flags;
12288 sinfo_assoc_id = srcv->sinfo_assoc_id;
12289 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12290 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12291 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12295 if (srcv->sinfo_flags)
12296 SCTP_STAT_INCR(sctps_sends_with_flags);
12298 sinfo_flags = inp->def_send.sinfo_flags;
12299 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12301 if (sinfo_flags & SCTP_SENDALL) {
12302 /* its a sendall */
12303 error = sctp_sendall(inp, uio, top, srcv);
12307 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12308 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12312 /* now we must find the assoc */
12313 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12314 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12315 SCTP_INP_RLOCK(inp);
12316 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12318 SCTP_TCB_LOCK(stcb);
12321 SCTP_INP_RUNLOCK(inp);
12322 } else if (sinfo_assoc_id) {
12323 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12326 * Since we did not use findep we must
12327 * increment it, and if we don't find a tcb
12330 SCTP_INP_WLOCK(inp);
12331 SCTP_INP_INCR_REF(inp);
12332 SCTP_INP_WUNLOCK(inp);
12333 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12334 if (stcb == NULL) {
12335 SCTP_INP_WLOCK(inp);
12336 SCTP_INP_DECR_REF(inp);
12337 SCTP_INP_WUNLOCK(inp);
12342 if ((stcb == NULL) && (addr)) {
12343 /* Possible implicit send? */
12344 SCTP_ASOC_CREATE_LOCK(inp);
12345 create_lock_applied = 1;
12346 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12347 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12348 /* Should I really unlock ? */
12349 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12354 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12355 (addr->sa_family == AF_INET6)) {
12356 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12360 SCTP_INP_WLOCK(inp);
12361 SCTP_INP_INCR_REF(inp);
12362 SCTP_INP_WUNLOCK(inp);
12363 /* With the lock applied look again */
12364 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12365 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12366 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12368 if (stcb == NULL) {
12369 SCTP_INP_WLOCK(inp);
12370 SCTP_INP_DECR_REF(inp);
12371 SCTP_INP_WUNLOCK(inp);
12378 if (t_inp != inp) {
12379 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12384 if (stcb == NULL) {
12385 if (addr == NULL) {
12386 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12390 /* We must go ahead and start the INIT process */
12393 if ((sinfo_flags & SCTP_ABORT) ||
12394 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12396 * User asks to abort a non-existant assoc,
12397 * or EOF a non-existant assoc with no data
12399 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12403 /* get an asoc/stcb struct */
12404 vrf_id = inp->def_vrf_id;
12406 if (create_lock_applied == 0) {
12407 panic("Error, should hold create lock and I don't?");
12410 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12413 if (stcb == NULL) {
12414 /* Error is setup for us in the call */
12417 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12418 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12420 * Set the connected flag so we can queue
12423 soisconnecting(so);
12426 if (create_lock_applied) {
12427 SCTP_ASOC_CREATE_UNLOCK(inp);
12428 create_lock_applied = 0;
12430 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12433 * Turn on queue only flag to prevent data from
12437 asoc = &stcb->asoc;
12438 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12439 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12441 /* initialize authentication params for the assoc */
12442 sctp_initialize_auth_params(inp, stcb);
12445 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12446 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12447 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12453 /* out with the INIT */
12454 queue_only_for_init = 1;
12456 * we may want to dig in after this call and adjust the MTU
12457 * value. It defaulted to 1500 (constant) but the ro
12458 * structure may now have an update and thus we may need to
12459 * change it BEFORE we append the message.
12463 asoc = &stcb->asoc;
12465 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12466 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12468 net = sctp_findnet(stcb, addr);
12471 if ((net == NULL) ||
12472 ((port != 0) && (port != stcb->rport))) {
12473 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12478 if (stcb->asoc.alternate) {
12479 net = stcb->asoc.alternate;
12481 net = stcb->asoc.primary_destination;
12484 atomic_add_int(&stcb->total_sends, 1);
12485 /* Keep the stcb from being freed under our feet */
12486 atomic_add_int(&asoc->refcnt, 1);
12487 free_cnt_applied = 1;
12489 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12490 if (sndlen > asoc->smallest_mtu) {
12491 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12496 if (SCTP_SO_IS_NBIO(so)
12497 || (flags & MSG_NBIO)
12501 /* would we block? */
12502 if (non_blocking) {
12503 if (hold_tcblock == 0) {
12504 SCTP_TCB_LOCK(stcb);
12507 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12508 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12509 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12510 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12511 if (sndlen > SCTP_SB_LIMIT_SND(so))
12514 error = EWOULDBLOCK;
12517 stcb->asoc.sb_send_resv += sndlen;
12518 SCTP_TCB_UNLOCK(stcb);
12521 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12523 local_soresv = sndlen;
12524 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12525 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12526 error = ECONNRESET;
12529 if (create_lock_applied) {
12530 SCTP_ASOC_CREATE_UNLOCK(inp);
12531 create_lock_applied = 0;
12533 if (asoc->stream_reset_outstanding) {
12535 * Can't queue any data while stream reset is underway.
12537 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12541 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12542 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12545 /* we are now done with all control */
12547 sctp_m_freem(control);
12550 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12551 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12552 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12553 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12554 if (srcv->sinfo_flags & SCTP_ABORT) {
12557 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12558 error = ECONNRESET;
12562 /* Ok, we will attempt a msgsnd :> */
12564 p->td_ru.ru_msgsnd++;
12566 /* Are we aborting? */
12567 if (srcv->sinfo_flags & SCTP_ABORT) {
12569 int tot_demand, tot_out = 0, max_out;
12571 SCTP_STAT_INCR(sctps_sends_with_abort);
12572 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12573 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12574 /* It has to be up before we abort */
12575 /* how big is the user initiated abort? */
12576 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12580 if (hold_tcblock) {
12581 SCTP_TCB_UNLOCK(stcb);
12585 struct mbuf *cntm = NULL;
12587 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12589 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12590 tot_out += SCTP_BUF_LEN(cntm);
12594 /* Must fit in a MTU */
12596 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12597 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12599 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12603 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12606 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12610 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12611 max_out -= sizeof(struct sctp_abort_msg);
12612 if (tot_out > max_out) {
12616 struct sctp_paramhdr *ph;
12618 /* now move forward the data pointer */
12619 ph = mtod(mm, struct sctp_paramhdr *);
12620 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12621 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12623 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12625 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12628 * Here if we can't get his data we
12629 * still abort we just don't get to
12630 * send the users note :-0
12637 SCTP_BUF_NEXT(mm) = top;
12641 if (hold_tcblock == 0) {
12642 SCTP_TCB_LOCK(stcb);
12644 atomic_add_int(&stcb->asoc.refcnt, -1);
12645 free_cnt_applied = 0;
12646 /* release this lock, otherwise we hang on ourselves */
12647 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12648 /* now relock the stcb so everything is sane */
12652 * In this case top is already chained to mm avoid double
12653 * free, since we free it below if top != NULL and driver
12654 * would free it after sending the packet out
12661 /* Calculate the maximum we can send */
12662 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12663 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12664 if (non_blocking) {
12665 /* we already checked for non-blocking above. */
12668 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12673 if (hold_tcblock) {
12674 SCTP_TCB_UNLOCK(stcb);
12677 /* Is the stream no. valid? */
12678 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12679 /* Invalid stream number */
12680 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12684 if (asoc->strmout == NULL) {
12685 /* huh? software error */
12686 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12690 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12691 if ((user_marks_eor == 0) &&
12692 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12693 /* It will NEVER fit */
12694 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12698 if ((uio == NULL) && user_marks_eor) {
12700 * We do not support eeor mode for
12701 * sending with mbuf chains (like sendfile).
12703 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12707 if (user_marks_eor) {
12708 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12711 * For non-eeor the whole message must fit in
12712 * the socket send buffer.
12714 local_add_more = sndlen;
12717 if (non_blocking) {
12718 goto skip_preblock;
12720 if (((max_len <= local_add_more) &&
12721 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12723 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12724 /* No room right now ! */
12725 SOCKBUF_LOCK(&so->so_snd);
12726 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12727 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12728 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12729 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12730 (unsigned int)SCTP_SB_LIMIT_SND(so),
12733 stcb->asoc.stream_queue_cnt,
12734 stcb->asoc.chunks_on_out_queue,
12735 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12736 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12737 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12740 stcb->block_entry = &be;
12741 error = sbwait(&so->so_snd);
12742 stcb->block_entry = NULL;
12743 if (error || so->so_error || be.error) {
12746 error = so->so_error;
12751 SOCKBUF_UNLOCK(&so->so_snd);
12754 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12755 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12756 asoc, stcb->asoc.total_output_queue_size);
12758 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12761 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12763 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12764 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12768 SOCKBUF_UNLOCK(&so->so_snd);
12771 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12775 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12776 * case NOTE: uio will be null when top/mbuf is passed
12779 if (srcv->sinfo_flags & SCTP_EOF) {
12780 got_all_of_the_send = 1;
12783 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12789 struct sctp_stream_queue_pending *sp;
12790 struct sctp_stream_out *strm;
12793 SCTP_TCB_SEND_LOCK(stcb);
12794 if ((asoc->stream_locked) &&
12795 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12796 SCTP_TCB_SEND_UNLOCK(stcb);
12797 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12801 SCTP_TCB_SEND_UNLOCK(stcb);
12803 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12804 if (strm->last_msg_incomplete == 0) {
12806 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12807 if ((sp == NULL) || (error)) {
12810 SCTP_TCB_SEND_LOCK(stcb);
12811 if (sp->msg_is_complete) {
12812 strm->last_msg_incomplete = 0;
12813 asoc->stream_locked = 0;
12816 * Just got locked to this guy in case of an
12819 strm->last_msg_incomplete = 1;
12820 asoc->stream_locked = 1;
12821 asoc->stream_locked_on = srcv->sinfo_stream;
12822 sp->sender_all_done = 0;
12824 sctp_snd_sb_alloc(stcb, sp->length);
12825 atomic_add_int(&asoc->stream_queue_cnt, 1);
12826 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12827 SCTP_STAT_INCR(sctps_sends_with_unord);
12829 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12830 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12831 SCTP_TCB_SEND_UNLOCK(stcb);
12833 SCTP_TCB_SEND_LOCK(stcb);
12834 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12835 SCTP_TCB_SEND_UNLOCK(stcb);
12837 /* ???? Huh ??? last msg is gone */
12839 panic("Warning: Last msg marked incomplete, yet nothing left?");
12841 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12842 strm->last_msg_incomplete = 0;
12848 while (uio->uio_resid > 0) {
12849 /* How much room do we have? */
12850 struct mbuf *new_tail, *mm;
12852 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12853 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12857 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12858 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12859 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12862 if (hold_tcblock) {
12863 SCTP_TCB_UNLOCK(stcb);
12866 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12867 if ((mm == NULL) || error) {
12873 /* Update the mbuf and count */
12874 SCTP_TCB_SEND_LOCK(stcb);
12875 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12877 * we need to get out. Peer probably
12881 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12882 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12883 error = ECONNRESET;
12885 SCTP_TCB_SEND_UNLOCK(stcb);
12888 if (sp->tail_mbuf) {
12889 /* tack it to the end */
12890 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12891 sp->tail_mbuf = new_tail;
12893 /* A stolen mbuf */
12895 sp->tail_mbuf = new_tail;
12897 sctp_snd_sb_alloc(stcb, sndout);
12898 atomic_add_int(&sp->length, sndout);
12901 /* Did we reach EOR? */
12902 if ((uio->uio_resid == 0) &&
12903 ((user_marks_eor == 0) ||
12904 (srcv->sinfo_flags & SCTP_EOF) ||
12905 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12906 sp->msg_is_complete = 1;
12908 sp->msg_is_complete = 0;
12910 SCTP_TCB_SEND_UNLOCK(stcb);
12912 if (uio->uio_resid == 0) {
12917 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
12919 * This is ugly but we must assure locking
12922 if (hold_tcblock == 0) {
12923 SCTP_TCB_LOCK(stcb);
12926 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12927 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12928 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12929 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12935 SCTP_TCB_UNLOCK(stcb);
12938 /* wait for space now */
12939 if (non_blocking) {
12940 /* Non-blocking io in place out */
12943 /* What about the INIT, send it maybe */
12944 if (queue_only_for_init) {
12945 if (hold_tcblock == 0) {
12946 SCTP_TCB_LOCK(stcb);
12949 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12950 /* a collision took us forward? */
12953 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12954 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12958 if ((net->flight_size > net->cwnd) &&
12959 (asoc->sctp_cmt_on_off == 0)) {
12960 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12962 } else if (asoc->ifp_had_enobuf) {
12963 SCTP_STAT_INCR(sctps_ifnomemqueued);
12964 if (net->flight_size > (2 * net->mtu)) {
12967 asoc->ifp_had_enobuf = 0;
12969 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12970 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12971 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12972 (stcb->asoc.total_flight > 0) &&
12973 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12974 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12977 * Ok, Nagle is set on and we have data outstanding.
12978 * Don't send anything and let SACKs drive out the
12979 * data unless wen have a "full" segment to send.
12981 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12982 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12984 SCTP_STAT_INCR(sctps_naglequeued);
12987 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12988 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12989 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12991 SCTP_STAT_INCR(sctps_naglesent);
12994 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12996 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12997 nagle_applies, un_sent);
12998 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12999 stcb->asoc.total_flight,
13000 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13002 if (queue_only_for_init)
13003 queue_only_for_init = 0;
13004 if ((queue_only == 0) && (nagle_applies == 0)) {
13006 * need to start chunk output
13007 * before blocking.. note that if
13008 * a lock is already applied, then
13009 * the input via the net is happening
13010 * and I don't need to start output :-D
13012 if (hold_tcblock == 0) {
13013 if (SCTP_TCB_TRYLOCK(stcb)) {
13015 sctp_chunk_output(inp,
13017 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13020 sctp_chunk_output(inp,
13022 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13024 if (hold_tcblock == 1) {
13025 SCTP_TCB_UNLOCK(stcb);
13029 SOCKBUF_LOCK(&so->so_snd);
13031 * This is a bit strange, but I think it will
13032 * work. The total_output_queue_size is locked and
13033 * protected by the TCB_LOCK, which we just released.
13034 * There is a race that can occur between releasing it
13035 * above, and me getting the socket lock, where sacks
13036 * come in but we have not put the SB_WAIT on the
13037 * so_snd buffer to get the wakeup. After the LOCK
13038 * is applied the sack_processing will also need to
13039 * LOCK the so->so_snd to do the actual sowwakeup(). So
13040 * once we have the socket buffer lock if we recheck the
13041 * size we KNOW we will get to sleep safely with the
13042 * wakeup flag in place.
13044 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13045 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13046 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13047 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13048 asoc, uio->uio_resid);
13051 stcb->block_entry = &be;
13052 error = sbwait(&so->so_snd);
13053 stcb->block_entry = NULL;
13055 if (error || so->so_error || be.error) {
13058 error = so->so_error;
13063 SOCKBUF_UNLOCK(&so->so_snd);
13066 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13067 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13068 asoc, stcb->asoc.total_output_queue_size);
13071 SOCKBUF_UNLOCK(&so->so_snd);
13072 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13076 SCTP_TCB_SEND_LOCK(stcb);
13078 if (sp->msg_is_complete == 0) {
13079 strm->last_msg_incomplete = 1;
13080 asoc->stream_locked = 1;
13081 asoc->stream_locked_on = srcv->sinfo_stream;
13083 sp->sender_all_done = 1;
13084 strm->last_msg_incomplete = 0;
13085 asoc->stream_locked = 0;
13088 SCTP_PRINTF("Huh no sp TSNH?\n");
13089 strm->last_msg_incomplete = 0;
13090 asoc->stream_locked = 0;
13092 SCTP_TCB_SEND_UNLOCK(stcb);
13093 if (uio->uio_resid == 0) {
13094 got_all_of_the_send = 1;
13097 /* We send in a 0, since we do NOT have any locks */
13098 error = sctp_msg_append(stcb, net, top, srcv, 0);
13100 if (srcv->sinfo_flags & SCTP_EOF) {
13102 * This should only happen for Panda for the mbuf
13103 * send case, which does NOT yet support EEOR mode.
13104 * Thus, we can just set this flag to do the proper
13107 got_all_of_the_send = 1;
13115 if ((srcv->sinfo_flags & SCTP_EOF) &&
13116 (got_all_of_the_send == 1)) {
13119 SCTP_STAT_INCR(sctps_sends_with_eof);
13121 if (hold_tcblock == 0) {
13122 SCTP_TCB_LOCK(stcb);
13125 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13126 if (TAILQ_EMPTY(&asoc->send_queue) &&
13127 TAILQ_EMPTY(&asoc->sent_queue) &&
13129 if (asoc->locked_on_sending) {
13132 /* there is nothing queued to send, so I'm done... */
13133 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13134 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13135 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13136 struct sctp_nets *netp;
13138 /* only send SHUTDOWN the first time through */
13139 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13140 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13142 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13143 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13144 sctp_stop_timers_for_shutdown(stcb);
13145 if (stcb->asoc.alternate) {
13146 netp = stcb->asoc.alternate;
13148 netp = stcb->asoc.primary_destination;
13150 sctp_send_shutdown(stcb, netp);
13151 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13153 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13154 asoc->primary_destination);
13158 * we still got (or just got) data to send, so set
13162 * XXX sockets draft says that SCTP_EOF should be
13163 * sent with no data. currently, we will allow user
13164 * data to be sent first and move to
13167 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13168 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13169 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13170 if (hold_tcblock == 0) {
13171 SCTP_TCB_LOCK(stcb);
13174 if (asoc->locked_on_sending) {
13175 /* Locked to send out the data */
13176 struct sctp_stream_queue_pending *sp;
13178 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13180 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13181 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13184 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13185 if (TAILQ_EMPTY(&asoc->send_queue) &&
13186 TAILQ_EMPTY(&asoc->sent_queue) &&
13187 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13189 if (free_cnt_applied) {
13190 atomic_add_int(&stcb->asoc.refcnt, -1);
13191 free_cnt_applied = 0;
13193 sctp_abort_an_association(stcb->sctp_ep, stcb,
13194 NULL, SCTP_SO_LOCKED);
13196 * now relock the stcb so everything
13203 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13204 asoc->primary_destination);
13205 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13210 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13211 some_on_control = 1;
13213 if (queue_only_for_init) {
13214 if (hold_tcblock == 0) {
13215 SCTP_TCB_LOCK(stcb);
13218 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13219 /* a collision took us forward? */
13222 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13223 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13227 if ((net->flight_size > net->cwnd) &&
13228 (stcb->asoc.sctp_cmt_on_off == 0)) {
13229 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13231 } else if (asoc->ifp_had_enobuf) {
13232 SCTP_STAT_INCR(sctps_ifnomemqueued);
13233 if (net->flight_size > (2 * net->mtu)) {
13236 asoc->ifp_had_enobuf = 0;
13238 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13239 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13240 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13241 (stcb->asoc.total_flight > 0) &&
13242 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13243 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13245 * Ok, Nagle is set on and we have data outstanding.
13246 * Don't send anything and let SACKs drive out the
13247 * data unless wen have a "full" segment to send.
13249 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13250 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13252 SCTP_STAT_INCR(sctps_naglequeued);
13255 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13256 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13257 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13259 SCTP_STAT_INCR(sctps_naglesent);
13262 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13263 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13264 nagle_applies, un_sent);
13265 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13266 stcb->asoc.total_flight,
13267 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13269 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13270 /* we can attempt to send too. */
13271 if (hold_tcblock == 0) {
13273 * If there is activity recv'ing sacks no need to
13276 if (SCTP_TCB_TRYLOCK(stcb)) {
13277 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13281 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13283 } else if ((queue_only == 0) &&
13284 (stcb->asoc.peers_rwnd == 0) &&
13285 (stcb->asoc.total_flight == 0)) {
13286 /* We get to have a probe outstanding */
13287 if (hold_tcblock == 0) {
13289 SCTP_TCB_LOCK(stcb);
13291 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13292 } else if (some_on_control) {
13293 int num_out, reason, frag_point;
13295 /* Here we do control only */
13296 if (hold_tcblock == 0) {
13298 SCTP_TCB_LOCK(stcb);
13300 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13301 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13302 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13304 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13305 queue_only, stcb->asoc.peers_rwnd, un_sent,
13306 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13307 stcb->asoc.total_output_queue_size, error);
13312 if (local_soresv && stcb) {
13313 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13315 if (create_lock_applied) {
13316 SCTP_ASOC_CREATE_UNLOCK(inp);
13318 if ((stcb) && hold_tcblock) {
13319 SCTP_TCB_UNLOCK(stcb);
13321 if (stcb && free_cnt_applied) {
13322 atomic_add_int(&stcb->asoc.refcnt, -1);
13326 if (mtx_owned(&stcb->tcb_mtx)) {
13327 panic("Leaving with tcb mtx owned?");
13329 if (mtx_owned(&stcb->tcb_send_mtx)) {
13330 panic("Leaving with tcb send mtx owned?");
13336 sctp_validate_no_locks(inp);
13338 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13345 sctp_m_freem(control);
13352 * generate an AUTHentication chunk, if required
13355 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13356 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13357 struct sctp_tcb *stcb, uint8_t chunk)
13359 struct mbuf *m_auth;
13360 struct sctp_auth_chunk *auth;
13364 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13368 if (stcb->asoc.auth_supported == 0) {
13371 /* does the requested chunk require auth? */
13372 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13375 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13376 if (m_auth == NULL) {
13380 /* reserve some space if this will be the first mbuf */
13382 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13383 /* fill in the AUTH chunk details */
13384 auth = mtod(m_auth, struct sctp_auth_chunk *);
13385 bzero(auth, sizeof(*auth));
13386 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13387 auth->ch.chunk_flags = 0;
13388 chunk_len = sizeof(*auth) +
13389 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13390 auth->ch.chunk_length = htons(chunk_len);
13391 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13392 /* key id and hmac digest will be computed and filled in upon send */
13394 /* save the offset where the auth was inserted into the chain */
13396 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13397 *offset += SCTP_BUF_LEN(cn);
13400 /* update length and return pointer to the auth chunk */
13401 SCTP_BUF_LEN(m_auth) = chunk_len;
13402 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13403 if (auth_ret != NULL)
13411 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13413 struct nd_prefix *pfx = NULL;
13414 struct nd_pfxrouter *pfxrtr = NULL;
13415 struct sockaddr_in6 gw6;
13417 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13420 /* get prefix entry of address */
13421 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13422 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13424 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13425 &src6->sin6_addr, &pfx->ndpr_mask))
13428 /* no prefix entry in the prefix list */
13430 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13431 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13434 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13435 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13437 /* search installed gateway from prefix entry */
13438 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13439 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13440 gw6.sin6_family = AF_INET6;
13441 gw6.sin6_len = sizeof(struct sockaddr_in6);
13442 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13443 sizeof(struct in6_addr));
13444 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13445 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13446 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13447 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13448 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13449 ro->ro_rt->rt_gateway)) {
13450 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13454 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13461 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13464 struct sockaddr_in *sin, *mask;
13465 struct ifaddr *ifa;
13466 struct in_addr srcnetaddr, gwnetaddr;
13468 if (ro == NULL || ro->ro_rt == NULL ||
13469 sifa->address.sa.sa_family != AF_INET) {
13472 ifa = (struct ifaddr *)sifa->ifa;
13473 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13474 sin = &sifa->address.sin;
13475 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13476 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13477 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13478 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13480 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13481 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13482 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13483 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13484 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13485 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {