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) {
3851 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3852 if (SCTP_BUF_IS_EXTENDED(mat)) {
3853 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3858 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3860 if (copy_initack == NULL) {
3862 sctp_m_freem(copy_init);
3865 #ifdef SCTP_MBUF_LOGGING
3866 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3869 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3870 if (SCTP_BUF_IS_EXTENDED(mat)) {
3871 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3876 /* easy side we just drop it on the end */
3877 ph = mtod(mret, struct sctp_paramhdr *);
3878 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3879 sizeof(struct sctp_paramhdr);
3880 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3881 sizeof(struct sctp_paramhdr));
3882 ph->param_type = htons(SCTP_STATE_COOKIE);
3883 ph->param_length = 0; /* fill in at the end */
3884 /* Fill in the stc cookie data */
3885 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3887 /* tack the INIT and then the INIT-ACK onto the chain */
3889 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3890 cookie_sz += SCTP_BUF_LEN(m_at);
3891 if (SCTP_BUF_NEXT(m_at) == NULL) {
3892 SCTP_BUF_NEXT(m_at) = copy_init;
3896 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3897 cookie_sz += SCTP_BUF_LEN(m_at);
3898 if (SCTP_BUF_NEXT(m_at) == NULL) {
3899 SCTP_BUF_NEXT(m_at) = copy_initack;
3903 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3904 cookie_sz += SCTP_BUF_LEN(m_at);
3905 if (SCTP_BUF_NEXT(m_at) == NULL) {
3909 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3911 /* no space, so free the entire chain */
3915 SCTP_BUF_LEN(sig) = 0;
3916 SCTP_BUF_NEXT(m_at) = sig;
3918 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3919 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3921 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3922 cookie_sz += SCTP_SIGNATURE_SIZE;
3923 ph->param_length = htons(cookie_sz);
3929 sctp_get_ect(struct sctp_tcb *stcb)
3931 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3932 return (SCTP_ECT0_BIT);
3938 #if defined(INET) || defined(INET6)
3940 sctp_handle_no_route(struct sctp_tcb *stcb,
3941 struct sctp_nets *net,
3944 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3948 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3949 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3950 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3951 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3952 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3956 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3957 net->dest_state &= ~SCTP_ADDR_PF;
3961 if (net == stcb->asoc.primary_destination) {
3962 /* need a new primary */
3963 struct sctp_nets *alt;
3965 alt = sctp_find_alternate_net(stcb, net, 0);
3967 if (stcb->asoc.alternate) {
3968 sctp_free_remote_addr(stcb->asoc.alternate);
3970 stcb->asoc.alternate = alt;
3971 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3972 if (net->ro._s_addr) {
3973 sctp_free_ifa(net->ro._s_addr);
3974 net->ro._s_addr = NULL;
3976 net->src_addr_selected = 0;
3986 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3987 struct sctp_tcb *stcb, /* may be NULL */
3988 struct sctp_nets *net,
3989 struct sockaddr *to,
3991 uint32_t auth_offset,
3992 struct sctp_auth_chunk *auth,
3993 uint16_t auth_keyid,
3994 int nofragment_flag,
4001 union sctp_sockstore *over_addr,
4002 uint8_t mflowtype, uint32_t mflowid,
4003 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4004 int so_locked SCTP_UNUSED
4009 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4012 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4013 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4014 * - fill in the HMAC digest of any AUTH chunk in the packet.
4015 * - calculate and fill in the SCTP checksum.
4016 * - prepend an IP address header.
4017 * - if boundall use INADDR_ANY.
4018 * - if boundspecific do source address selection.
4019 * - set fragmentation option for ipV4.
4020 * - On return from IP output, check/adjust mtu size of output
4021 * interface and smallest_mtu size as well.
4023 /* Will need ifdefs around this */
4025 struct sctphdr *sctphdr;
4029 #if defined(INET) || defined(INET6)
4033 #if defined(INET) || defined(INET6)
4035 sctp_route_t *ro = NULL;
4036 struct udphdr *udp = NULL;
4041 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4042 struct socket *so = NULL;
4046 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4047 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4051 #if defined(INET) || defined(INET6)
4053 vrf_id = stcb->asoc.vrf_id;
4055 vrf_id = inp->def_vrf_id;
4058 /* fill in the HMAC digest for any AUTH chunk in the packet */
4059 if ((auth != NULL) && (stcb != NULL)) {
4060 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4063 tos_value = net->dscp;
4065 tos_value = stcb->asoc.default_dscp;
4067 tos_value = inp->sctp_ep.default_dscp;
4070 switch (to->sa_family) {
4074 struct ip *ip = NULL;
4075 sctp_route_t iproute;
4078 len = sizeof(struct ip) + sizeof(struct sctphdr);
4080 len += sizeof(struct udphdr);
4082 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4085 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4088 SCTP_ALIGN_TO_END(newm, len);
4089 SCTP_BUF_LEN(newm) = len;
4090 SCTP_BUF_NEXT(newm) = m;
4093 m->m_pkthdr.flowid = net->flowid;
4094 M_HASHTYPE_SET(m, net->flowtype);
4096 m->m_pkthdr.flowid = mflowid;
4097 M_HASHTYPE_SET(m, mflowtype);
4099 packet_length = sctp_calculate_len(m);
4100 ip = mtod(m, struct ip *);
4101 ip->ip_v = IPVERSION;
4102 ip->ip_hl = (sizeof(struct ip) >> 2);
4103 if (tos_value == 0) {
4105 * This means especially, that it is not set
4106 * at the SCTP layer. So use the value from
4109 tos_value = inp->ip_inp.inp.inp_ip_tos;
4113 tos_value |= sctp_get_ect(stcb);
4115 if ((nofragment_flag) && (port == 0)) {
4116 ip->ip_off = htons(IP_DF);
4118 ip->ip_off = htons(0);
4120 /* FreeBSD has a function for ip_id's */
4121 ip->ip_id = ip_newid();
4123 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4124 ip->ip_len = htons(packet_length);
4125 ip->ip_tos = tos_value;
4127 ip->ip_p = IPPROTO_UDP;
4129 ip->ip_p = IPPROTO_SCTP;
4134 memset(&iproute, 0, sizeof(iproute));
4135 memcpy(&ro->ro_dst, to, to->sa_len);
4137 ro = (sctp_route_t *) & net->ro;
4139 /* Now the address selection part */
4140 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4142 /* call the routine to select the src address */
4143 if (net && out_of_asoc_ok == 0) {
4144 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4145 sctp_free_ifa(net->ro._s_addr);
4146 net->ro._s_addr = NULL;
4147 net->src_addr_selected = 0;
4153 if (net->src_addr_selected == 0) {
4154 /* Cache the source address */
4155 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4158 net->src_addr_selected = 1;
4160 if (net->ro._s_addr == NULL) {
4161 /* No route to host */
4162 net->src_addr_selected = 0;
4163 sctp_handle_no_route(stcb, net, so_locked);
4164 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4166 return (EHOSTUNREACH);
4168 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4170 if (over_addr == NULL) {
4171 struct sctp_ifa *_lsrc;
4173 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4177 if (_lsrc == NULL) {
4178 sctp_handle_no_route(stcb, net, so_locked);
4179 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4181 return (EHOSTUNREACH);
4183 ip->ip_src = _lsrc->address.sin.sin_addr;
4184 sctp_free_ifa(_lsrc);
4186 ip->ip_src = over_addr->sin.sin_addr;
4187 SCTP_RTALLOC(ro, vrf_id);
4191 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4192 sctp_handle_no_route(stcb, net, so_locked);
4193 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4195 return (EHOSTUNREACH);
4197 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4198 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4199 udp->uh_dport = port;
4200 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4202 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4206 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4208 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4211 sctphdr->src_port = src_port;
4212 sctphdr->dest_port = dest_port;
4213 sctphdr->v_tag = v_tag;
4214 sctphdr->checksum = 0;
4217 * If source address selection fails and we find no
4218 * route then the ip_output should fail as well with
4219 * a NO_ROUTE_TO_HOST type error. We probably should
4220 * catch that somewhere and abort the association
4221 * right away (assuming this is an INIT being sent).
4223 if (ro->ro_rt == NULL) {
4225 * src addr selection failed to find a route
4226 * (or valid source addr), so we can't get
4227 * there from here (yet)!
4229 sctp_handle_no_route(stcb, net, so_locked);
4230 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4232 return (EHOSTUNREACH);
4234 if (ro != &iproute) {
4235 memcpy(&iproute, ro, sizeof(*ro));
4237 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4238 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4239 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4240 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4241 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4244 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4245 /* failed to prepend data, give up */
4246 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4250 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4252 #if defined(SCTP_WITH_NO_CSUM)
4253 SCTP_STAT_INCR(sctps_sendnocrc);
4255 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4256 SCTP_STAT_INCR(sctps_sendswcrc);
4259 SCTP_ENABLE_UDP_CSUM(o_pak);
4262 #if defined(SCTP_WITH_NO_CSUM)
4263 SCTP_STAT_INCR(sctps_sendnocrc);
4265 m->m_pkthdr.csum_flags = CSUM_SCTP;
4266 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4267 SCTP_STAT_INCR(sctps_sendhwcrc);
4270 #ifdef SCTP_PACKET_LOGGING
4271 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4272 sctp_packet_log(o_pak);
4274 /* send it out. table id is taken from stcb */
4275 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4276 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4277 so = SCTP_INP_SO(inp);
4278 SCTP_SOCKET_UNLOCK(so, 0);
4281 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4282 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4283 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4284 atomic_add_int(&stcb->asoc.refcnt, 1);
4285 SCTP_TCB_UNLOCK(stcb);
4286 SCTP_SOCKET_LOCK(so, 0);
4287 SCTP_TCB_LOCK(stcb);
4288 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4291 SCTP_STAT_INCR(sctps_sendpackets);
4292 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4294 SCTP_STAT_INCR(sctps_senderrors);
4296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4298 /* free tempy routes */
4302 * PMTU check versus smallest asoc MTU goes
4305 if ((ro->ro_rt != NULL) &&
4306 (net->ro._s_addr)) {
4309 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4311 mtu -= sizeof(struct udphdr);
4313 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4314 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4317 } else if (ro->ro_rt == NULL) {
4318 /* route was freed */
4319 if (net->ro._s_addr &&
4320 net->src_addr_selected) {
4321 sctp_free_ifa(net->ro._s_addr);
4322 net->ro._s_addr = NULL;
4324 net->src_addr_selected = 0;
4333 uint32_t flowlabel, flowinfo;
4334 struct ip6_hdr *ip6h;
4335 struct route_in6 ip6route;
4337 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4339 struct sockaddr_in6 lsa6_storage;
4341 u_short prev_port = 0;
4345 flowlabel = net->flowlabel;
4347 flowlabel = stcb->asoc.default_flowlabel;
4349 flowlabel = inp->sctp_ep.default_flowlabel;
4351 if (flowlabel == 0) {
4353 * This means especially, that it is not set
4354 * at the SCTP layer. So use the value from
4357 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4359 flowlabel &= 0x000fffff;
4360 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4362 len += sizeof(struct udphdr);
4364 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4367 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4370 SCTP_ALIGN_TO_END(newm, len);
4371 SCTP_BUF_LEN(newm) = len;
4372 SCTP_BUF_NEXT(newm) = m;
4375 m->m_pkthdr.flowid = net->flowid;
4376 M_HASHTYPE_SET(m, net->flowtype);
4378 m->m_pkthdr.flowid = mflowid;
4379 M_HASHTYPE_SET(m, mflowtype);
4381 packet_length = sctp_calculate_len(m);
4383 ip6h = mtod(m, struct ip6_hdr *);
4384 /* protect *sin6 from overwrite */
4385 sin6 = (struct sockaddr_in6 *)to;
4389 /* KAME hack: embed scopeid */
4390 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4391 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4395 memset(&ip6route, 0, sizeof(ip6route));
4396 ro = (sctp_route_t *) & ip6route;
4397 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4399 ro = (sctp_route_t *) & net->ro;
4402 * We assume here that inp_flow is in host byte
4403 * order within the TCB!
4405 if (tos_value == 0) {
4407 * This means especially, that it is not set
4408 * at the SCTP layer. So use the value from
4411 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4415 tos_value |= sctp_get_ect(stcb);
4419 flowinfo |= tos_value;
4421 flowinfo |= flowlabel;
4422 ip6h->ip6_flow = htonl(flowinfo);
4424 ip6h->ip6_nxt = IPPROTO_UDP;
4426 ip6h->ip6_nxt = IPPROTO_SCTP;
4428 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4429 ip6h->ip6_dst = sin6->sin6_addr;
4432 * Add SRC address selection here: we can only reuse
4433 * to a limited degree the kame src-addr-sel, since
4434 * we can try their selection but it may not be
4437 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4438 lsa6_tmp.sin6_family = AF_INET6;
4439 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4441 if (net && out_of_asoc_ok == 0) {
4442 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4443 sctp_free_ifa(net->ro._s_addr);
4444 net->ro._s_addr = NULL;
4445 net->src_addr_selected = 0;
4451 if (net->src_addr_selected == 0) {
4452 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4453 /* KAME hack: embed scopeid */
4454 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4455 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4458 /* Cache the source address */
4459 net->ro._s_addr = sctp_source_address_selection(inp,
4465 (void)sa6_recoverscope(sin6);
4466 net->src_addr_selected = 1;
4468 if (net->ro._s_addr == NULL) {
4469 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4470 net->src_addr_selected = 0;
4471 sctp_handle_no_route(stcb, net, so_locked);
4472 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4474 return (EHOSTUNREACH);
4476 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4478 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4479 /* KAME hack: embed scopeid */
4480 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4481 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4484 if (over_addr == NULL) {
4485 struct sctp_ifa *_lsrc;
4487 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4491 if (_lsrc == NULL) {
4492 sctp_handle_no_route(stcb, net, so_locked);
4493 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4495 return (EHOSTUNREACH);
4497 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4498 sctp_free_ifa(_lsrc);
4500 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4501 SCTP_RTALLOC(ro, vrf_id);
4503 (void)sa6_recoverscope(sin6);
4505 lsa6->sin6_port = inp->sctp_lport;
4507 if (ro->ro_rt == NULL) {
4509 * src addr selection failed to find a route
4510 * (or valid source addr), so we can't get
4513 sctp_handle_no_route(stcb, net, so_locked);
4514 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4516 return (EHOSTUNREACH);
4519 * XXX: sa6 may not have a valid sin6_scope_id in
4520 * the non-SCOPEDROUTING case.
4522 bzero(&lsa6_storage, sizeof(lsa6_storage));
4523 lsa6_storage.sin6_family = AF_INET6;
4524 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4525 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4526 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4527 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4532 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4533 lsa6_storage.sin6_port = inp->sctp_lport;
4534 lsa6 = &lsa6_storage;
4535 ip6h->ip6_src = lsa6->sin6_addr;
4538 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4539 sctp_handle_no_route(stcb, net, so_locked);
4540 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4542 return (EHOSTUNREACH);
4544 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4545 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4546 udp->uh_dport = port;
4547 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4549 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4551 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4554 sctphdr->src_port = src_port;
4555 sctphdr->dest_port = dest_port;
4556 sctphdr->v_tag = v_tag;
4557 sctphdr->checksum = 0;
4560 * We set the hop limit now since there is a good
4561 * chance that our ro pointer is now filled
4563 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4564 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4567 /* Copy to be sure something bad is not happening */
4568 sin6->sin6_addr = ip6h->ip6_dst;
4569 lsa6->sin6_addr = ip6h->ip6_src;
4572 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4573 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4574 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4575 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4576 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4578 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4580 * preserve the port and scope for link
4583 prev_scope = sin6->sin6_scope_id;
4584 prev_port = sin6->sin6_port;
4586 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4587 /* failed to prepend data, give up */
4589 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4592 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4594 #if defined(SCTP_WITH_NO_CSUM)
4595 SCTP_STAT_INCR(sctps_sendnocrc);
4597 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4598 SCTP_STAT_INCR(sctps_sendswcrc);
4600 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4601 udp->uh_sum = 0xffff;
4604 #if defined(SCTP_WITH_NO_CSUM)
4605 SCTP_STAT_INCR(sctps_sendnocrc);
4607 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4608 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4609 SCTP_STAT_INCR(sctps_sendhwcrc);
4612 /* send it out. table id is taken from stcb */
4613 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4614 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4615 so = SCTP_INP_SO(inp);
4616 SCTP_SOCKET_UNLOCK(so, 0);
4619 #ifdef SCTP_PACKET_LOGGING
4620 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4621 sctp_packet_log(o_pak);
4623 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4624 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4625 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4626 atomic_add_int(&stcb->asoc.refcnt, 1);
4627 SCTP_TCB_UNLOCK(stcb);
4628 SCTP_SOCKET_LOCK(so, 0);
4629 SCTP_TCB_LOCK(stcb);
4630 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4634 /* for link local this must be done */
4635 sin6->sin6_scope_id = prev_scope;
4636 sin6->sin6_port = prev_port;
4638 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4639 SCTP_STAT_INCR(sctps_sendpackets);
4640 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4642 SCTP_STAT_INCR(sctps_senderrors);
4645 /* Now if we had a temp route free it */
4649 * PMTU check versus smallest asoc MTU goes
4652 if (ro->ro_rt == NULL) {
4653 /* Route was freed */
4654 if (net->ro._s_addr &&
4655 net->src_addr_selected) {
4656 sctp_free_ifa(net->ro._s_addr);
4657 net->ro._s_addr = NULL;
4659 net->src_addr_selected = 0;
4661 if ((ro->ro_rt != NULL) &&
4662 (net->ro._s_addr)) {
4665 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4667 (stcb->asoc.smallest_mtu > mtu)) {
4668 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4671 net->mtu -= sizeof(struct udphdr);
4675 if (ND_IFINFO(ifp)->linkmtu &&
4676 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4677 sctp_mtu_size_reset(inp,
4679 ND_IFINFO(ifp)->linkmtu);
4687 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4688 ((struct sockaddr *)to)->sa_family);
4690 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4697 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4698 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4703 struct mbuf *m, *m_last;
4704 struct sctp_nets *net;
4705 struct sctp_init_chunk *init;
4706 struct sctp_supported_addr_param *sup_addr;
4707 struct sctp_adaptation_layer_indication *ali;
4708 struct sctp_supported_chunk_types_param *pr_supported;
4709 struct sctp_paramhdr *ph;
4710 int cnt_inits_to = 0;
4712 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4714 /* INIT's always go to the primary (and usually ONLY address) */
4715 net = stcb->asoc.primary_destination;
4717 net = TAILQ_FIRST(&stcb->asoc.nets);
4722 /* we confirm any address we send an INIT to */
4723 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4724 (void)sctp_set_primary_addr(stcb, NULL, net);
4726 /* we confirm any address we send an INIT to */
4727 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4729 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4731 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4733 * special hook, if we are sending to link local it will not
4734 * show up in our private address count.
4736 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4740 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4741 /* This case should not happen */
4742 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4745 /* start the INIT timer */
4746 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4748 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4750 /* No memory, INIT timer will re-attempt. */
4751 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4754 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4756 /* Now lets put the chunk header in place */
4757 init = mtod(m, struct sctp_init_chunk *);
4758 /* now the chunk header */
4759 init->ch.chunk_type = SCTP_INITIATION;
4760 init->ch.chunk_flags = 0;
4761 /* fill in later from mbuf we build */
4762 init->ch.chunk_length = 0;
4763 /* place in my tag */
4764 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4765 /* set up some of the credits. */
4766 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4767 SCTP_MINIMAL_RWND));
4768 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4769 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4770 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4772 /* Adaptation layer indication parameter */
4773 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4774 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4775 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4776 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4777 ali->ph.param_length = htons(parameter_len);
4778 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4779 chunk_len += parameter_len;
4782 if (stcb->asoc.ecn_supported == 1) {
4783 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4784 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4785 ph->param_type = htons(SCTP_ECN_CAPABLE);
4786 ph->param_length = htons(parameter_len);
4787 chunk_len += parameter_len;
4789 /* PR-SCTP supported parameter */
4790 if (stcb->asoc.prsctp_supported == 1) {
4791 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4792 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4793 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4794 ph->param_length = htons(parameter_len);
4795 chunk_len += parameter_len;
4797 /* Add NAT friendly parameter. */
4798 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4799 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4800 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4801 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4802 ph->param_length = htons(parameter_len);
4803 chunk_len += parameter_len;
4805 /* And now tell the peer which extensions we support */
4807 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4808 if (stcb->asoc.prsctp_supported == 1) {
4809 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4811 if (stcb->asoc.auth_supported == 1) {
4812 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4814 if (stcb->asoc.asconf_supported == 1) {
4815 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4816 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4818 if (stcb->asoc.reconfig_supported == 1) {
4819 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4821 if (stcb->asoc.nrsack_supported == 1) {
4822 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4824 if (stcb->asoc.pktdrop_supported == 1) {
4825 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4828 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4829 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4830 pr_supported->ph.param_length = htons(parameter_len);
4831 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4832 chunk_len += parameter_len;
4834 /* add authentication parameters */
4835 if (stcb->asoc.auth_supported) {
4836 /* attach RANDOM parameter, if available */
4837 if (stcb->asoc.authinfo.random != NULL) {
4838 struct sctp_auth_random *randp;
4840 if (padding_len > 0) {
4841 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4842 chunk_len += padding_len;
4845 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4846 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4847 /* random key already contains the header */
4848 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4849 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4850 chunk_len += parameter_len;
4852 /* add HMAC_ALGO parameter */
4853 if (stcb->asoc.local_hmacs != NULL) {
4854 struct sctp_auth_hmac_algo *hmacs;
4856 if (padding_len > 0) {
4857 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4858 chunk_len += padding_len;
4861 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4862 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4863 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4864 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4865 hmacs->ph.param_length = htons(parameter_len);
4866 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4867 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4868 chunk_len += parameter_len;
4870 /* add CHUNKS parameter */
4871 if (stcb->asoc.local_auth_chunks != NULL) {
4872 struct sctp_auth_chunk_list *chunks;
4874 if (padding_len > 0) {
4875 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4876 chunk_len += padding_len;
4879 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4880 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4881 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4882 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4883 chunks->ph.param_length = htons(parameter_len);
4884 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4885 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4886 chunk_len += parameter_len;
4889 /* now any cookie time extensions */
4890 if (stcb->asoc.cookie_preserve_req) {
4891 struct sctp_cookie_perserve_param *cookie_preserve;
4893 if (padding_len > 0) {
4894 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4895 chunk_len += padding_len;
4898 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4899 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4900 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4901 cookie_preserve->ph.param_length = htons(parameter_len);
4902 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4903 stcb->asoc.cookie_preserve_req = 0;
4904 chunk_len += parameter_len;
4906 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4909 if (padding_len > 0) {
4910 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4911 chunk_len += padding_len;
4914 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4915 if (stcb->asoc.scope.ipv4_addr_legal) {
4916 parameter_len += (uint16_t) sizeof(uint16_t);
4918 if (stcb->asoc.scope.ipv6_addr_legal) {
4919 parameter_len += (uint16_t) sizeof(uint16_t);
4921 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4922 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4923 sup_addr->ph.param_length = htons(parameter_len);
4925 if (stcb->asoc.scope.ipv4_addr_legal) {
4926 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4928 if (stcb->asoc.scope.ipv6_addr_legal) {
4929 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4931 padding_len = 4 - 2 * i;
4932 chunk_len += parameter_len;
4934 SCTP_BUF_LEN(m) = chunk_len;
4935 /* now the addresses */
4937 * To optimize this we could put the scoping stuff into a structure
4938 * and remove the individual uint8's from the assoc structure. Then
4939 * we could just sifa in the address within the stcb. But for now
4940 * this is a quick hack to get the address stuff teased apart.
4942 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4944 &padding_len, &chunk_len);
4946 init->ch.chunk_length = htons(chunk_len);
4947 if (padding_len > 0) {
4948 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4953 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4954 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4955 (struct sockaddr *)&net->ro._l_addr,
4956 m, 0, NULL, 0, 0, 0, 0,
4957 inp->sctp_lport, stcb->rport, htonl(0),
4961 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4962 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4963 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4967 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4968 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4971 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4972 * being equal to the beginning of the params i.e. (iphlen +
4973 * sizeof(struct sctp_init_msg) parse through the parameters to the
4974 * end of the mbuf verifying that all parameters are known.
4976 * For unknown parameters build and return a mbuf with
4977 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4978 * processing this chunk stop, and set *abort_processing to 1.
4980 * By having param_offset be pre-set to where parameters begin it is
4981 * hoped that this routine may be reused in the future by new
4984 struct sctp_paramhdr *phdr, params;
4986 struct mbuf *mat, *op_err;
4987 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4988 int at, limit, pad_needed;
4989 uint16_t ptype, plen, padded_size;
4992 *abort_processing = 0;
4995 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4998 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4999 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5000 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
5001 ptype = ntohs(phdr->param_type);
5002 plen = ntohs(phdr->param_length);
5003 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5004 /* wacked parameter */
5005 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5008 limit -= SCTP_SIZE32(plen);
5010 * All parameters for all chunks that we know/understand are
5011 * listed here. We process them other places and make
5012 * appropriate stop actions per the upper bits. However this
5013 * is the generic routine processor's can call to get back
5014 * an operr.. to either incorporate (init-ack) or send.
5016 padded_size = SCTP_SIZE32(plen);
5018 /* Param's with variable size */
5019 case SCTP_HEARTBEAT_INFO:
5020 case SCTP_STATE_COOKIE:
5021 case SCTP_UNRECOG_PARAM:
5022 case SCTP_ERROR_CAUSE_IND:
5026 /* Param's with variable size within a range */
5027 case SCTP_CHUNK_LIST:
5028 case SCTP_SUPPORTED_CHUNK_EXT:
5029 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5030 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5035 case SCTP_SUPPORTED_ADDRTYPE:
5036 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5037 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5043 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5044 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5049 case SCTP_SET_PRIM_ADDR:
5050 case SCTP_DEL_IP_ADDRESS:
5051 case SCTP_ADD_IP_ADDRESS:
5052 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5053 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5054 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5059 /* Param's with a fixed size */
5060 case SCTP_IPV4_ADDRESS:
5061 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5062 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5067 case SCTP_IPV6_ADDRESS:
5068 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5069 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5074 case SCTP_COOKIE_PRESERVE:
5075 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5081 case SCTP_HAS_NAT_SUPPORT:
5084 case SCTP_PRSCTP_SUPPORTED:
5085 if (padded_size != sizeof(struct sctp_paramhdr)) {
5086 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5091 case SCTP_ECN_CAPABLE:
5092 if (padded_size != sizeof(struct sctp_paramhdr)) {
5093 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5098 case SCTP_ULP_ADAPTATION:
5099 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5100 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5105 case SCTP_SUCCESS_REPORT:
5106 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5112 case SCTP_HOSTNAME_ADDRESS:
5114 /* We can NOT handle HOST NAME addresses!! */
5117 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5118 *abort_processing = 1;
5119 if (op_err == NULL) {
5120 /* Ok need to try to get a mbuf */
5122 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5124 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5127 l_len += sizeof(struct sctp_paramhdr);
5128 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5130 SCTP_BUF_LEN(op_err) = 0;
5132 * pre-reserve space for ip
5133 * and sctp header and
5137 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5139 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5141 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5142 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5146 /* If we have space */
5147 struct sctp_paramhdr s;
5150 uint32_t cpthis = 0;
5152 pad_needed = 4 - (err_at % 4);
5153 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5154 err_at += pad_needed;
5156 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5157 s.param_length = htons(sizeof(s) + plen);
5158 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5159 err_at += sizeof(s);
5160 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5162 sctp_m_freem(op_err);
5164 * we are out of memory but
5165 * we still need to have a
5166 * look at what to do (the
5167 * system is in trouble
5172 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5179 * we do not recognize the parameter figure out what
5182 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5183 if ((ptype & 0x4000) == 0x4000) {
5184 /* Report bit is set?? */
5185 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5186 if (op_err == NULL) {
5189 /* Ok need to try to get an mbuf */
5191 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5193 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5196 l_len += sizeof(struct sctp_paramhdr);
5197 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5199 SCTP_BUF_LEN(op_err) = 0;
5201 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5203 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5205 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5206 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5210 /* If we have space */
5211 struct sctp_paramhdr s;
5214 uint32_t cpthis = 0;
5216 pad_needed = 4 - (err_at % 4);
5217 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5218 err_at += pad_needed;
5220 s.param_type = htons(SCTP_UNRECOG_PARAM);
5221 s.param_length = htons(sizeof(s) + plen);
5222 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5223 err_at += sizeof(s);
5224 if (plen > sizeof(tempbuf)) {
5225 plen = sizeof(tempbuf);
5227 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5229 sctp_m_freem(op_err);
5231 * we are out of memory but
5232 * we still need to have a
5233 * look at what to do (the
5234 * system is in trouble
5238 goto more_processing;
5240 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5245 if ((ptype & 0x8000) == 0x0000) {
5246 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5249 /* skip this chunk and continue processing */
5250 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5251 at += SCTP_SIZE32(plen);
5256 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5260 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5261 *abort_processing = 1;
5262 if ((op_err == NULL) && phdr) {
5266 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5268 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5270 l_len += (2 * sizeof(struct sctp_paramhdr));
5271 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5273 SCTP_BUF_LEN(op_err) = 0;
5275 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5277 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5279 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5280 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5283 if ((op_err) && phdr) {
5284 struct sctp_paramhdr s;
5287 uint32_t cpthis = 0;
5289 pad_needed = 4 - (err_at % 4);
5290 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5291 err_at += pad_needed;
5293 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5294 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5295 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5296 err_at += sizeof(s);
5297 /* Only copy back the p-hdr that caused the issue */
5298 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5304 sctp_are_there_new_addresses(struct sctp_association *asoc,
5305 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5308 * Given a INIT packet, look through the packet to verify that there
5309 * are NO new addresses. As we go through the parameters add reports
5310 * of any un-understood parameters that require an error. Also we
5311 * must return (1) to drop the packet if we see a un-understood
5312 * parameter that tells us to drop the chunk.
5314 struct sockaddr *sa_touse;
5315 struct sockaddr *sa;
5316 struct sctp_paramhdr *phdr, params;
5317 uint16_t ptype, plen;
5319 struct sctp_nets *net;
5322 struct sockaddr_in sin4, *sa4;
5326 struct sockaddr_in6 sin6, *sa6;
5331 memset(&sin4, 0, sizeof(sin4));
5332 sin4.sin_family = AF_INET;
5333 sin4.sin_len = sizeof(sin4);
5336 memset(&sin6, 0, sizeof(sin6));
5337 sin6.sin6_family = AF_INET6;
5338 sin6.sin6_len = sizeof(sin6);
5340 /* First what about the src address of the pkt ? */
5342 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5343 sa = (struct sockaddr *)&net->ro._l_addr;
5344 if (sa->sa_family == src->sa_family) {
5346 if (sa->sa_family == AF_INET) {
5347 struct sockaddr_in *src4;
5349 sa4 = (struct sockaddr_in *)sa;
5350 src4 = (struct sockaddr_in *)src;
5351 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5358 if (sa->sa_family == AF_INET6) {
5359 struct sockaddr_in6 *src6;
5361 sa6 = (struct sockaddr_in6 *)sa;
5362 src6 = (struct sockaddr_in6 *)src;
5363 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5372 /* New address added! no need to look futher. */
5375 /* Ok so far lets munge through the rest of the packet */
5376 offset += sizeof(struct sctp_init_chunk);
5377 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5380 ptype = ntohs(phdr->param_type);
5381 plen = ntohs(phdr->param_length);
5384 case SCTP_IPV4_ADDRESS:
5386 struct sctp_ipv4addr_param *p4, p4_buf;
5388 phdr = sctp_get_next_param(in_initpkt, offset,
5389 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5390 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5394 p4 = (struct sctp_ipv4addr_param *)phdr;
5395 sin4.sin_addr.s_addr = p4->addr;
5396 sa_touse = (struct sockaddr *)&sin4;
5401 case SCTP_IPV6_ADDRESS:
5403 struct sctp_ipv6addr_param *p6, p6_buf;
5405 phdr = sctp_get_next_param(in_initpkt, offset,
5406 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5407 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5411 p6 = (struct sctp_ipv6addr_param *)phdr;
5412 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5414 sa_touse = (struct sockaddr *)&sin6;
5423 /* ok, sa_touse points to one to check */
5425 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5426 sa = (struct sockaddr *)&net->ro._l_addr;
5427 if (sa->sa_family != sa_touse->sa_family) {
5431 if (sa->sa_family == AF_INET) {
5432 sa4 = (struct sockaddr_in *)sa;
5433 if (sa4->sin_addr.s_addr ==
5434 sin4.sin_addr.s_addr) {
5441 if (sa->sa_family == AF_INET6) {
5442 sa6 = (struct sockaddr_in6 *)sa;
5443 if (SCTP6_ARE_ADDR_EQUAL(
5452 /* New addr added! no need to look further */
5456 offset += SCTP_SIZE32(plen);
5457 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5463 * Given a MBUF chain that was sent into us containing an INIT. Build a
5464 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5465 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5466 * message (i.e. the struct sctp_init_msg).
5469 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5470 struct mbuf *init_pkt, int iphlen, int offset,
5471 struct sockaddr *src, struct sockaddr *dst,
5472 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5473 uint8_t mflowtype, uint32_t mflowid,
5474 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5476 struct sctp_association *asoc;
5477 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5478 struct sctp_init_ack_chunk *initack;
5479 struct sctp_adaptation_layer_indication *ali;
5480 struct sctp_supported_chunk_types_param *pr_supported;
5481 struct sctp_paramhdr *ph;
5482 union sctp_sockstore *over_addr;
5483 struct sctp_scoping scp;
5486 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5487 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5488 struct sockaddr_in *sin;
5492 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5493 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5494 struct sockaddr_in6 *sin6;
5497 struct sockaddr *to;
5498 struct sctp_state_cookie stc;
5499 struct sctp_nets *net = NULL;
5500 uint8_t *signature = NULL;
5501 int cnt_inits_to = 0;
5502 uint16_t his_limit, i_want;
5504 int nat_friendly = 0;
5506 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5513 if ((asoc != NULL) &&
5514 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5515 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5516 /* new addresses, out of here in non-cookie-wait states */
5518 * Send a ABORT, we don't add the new address error clause
5519 * though we even set the T bit and copy in the 0 tag.. this
5520 * looks no different than if no listener was present.
5522 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5524 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5530 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5531 (offset + sizeof(struct sctp_init_chunk)),
5532 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5535 if (op_err == NULL) {
5536 char msg[SCTP_DIAG_INFO_LEN];
5538 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5539 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5542 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5543 init_chk->init.initiate_tag, op_err,
5548 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5550 /* No memory, INIT timer will re-attempt. */
5552 sctp_m_freem(op_err);
5555 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5559 * We might not overwrite the identification[] completely and on
5560 * some platforms time_entered will contain some padding. Therefore
5561 * zero out the cookie to avoid putting uninitialized memory on the
5564 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5566 /* the time I built cookie */
5567 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5569 /* populate any tie tags */
5571 /* unlock before tag selections */
5572 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5573 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5574 stc.cookie_life = asoc->cookie_life;
5575 net = asoc->primary_destination;
5577 stc.tie_tag_my_vtag = 0;
5578 stc.tie_tag_peer_vtag = 0;
5579 /* life I will award this cookie */
5580 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5583 /* copy in the ports for later check */
5584 stc.myport = sh->dest_port;
5585 stc.peerport = sh->src_port;
5588 * If we wanted to honor cookie life extentions, we would add to
5589 * stc.cookie_life. For now we should NOT honor any extension
5591 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5592 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5593 stc.ipv6_addr_legal = 1;
5594 if (SCTP_IPV6_V6ONLY(inp)) {
5595 stc.ipv4_addr_legal = 0;
5597 stc.ipv4_addr_legal = 1;
5600 stc.ipv6_addr_legal = 0;
5601 stc.ipv4_addr_legal = 1;
5603 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5610 switch (dst->sa_family) {
5614 /* lookup address */
5615 stc.address[0] = src4->sin_addr.s_addr;
5619 stc.addr_type = SCTP_IPV4_ADDRESS;
5620 /* local from address */
5621 stc.laddress[0] = dst4->sin_addr.s_addr;
5622 stc.laddress[1] = 0;
5623 stc.laddress[2] = 0;
5624 stc.laddress[3] = 0;
5625 stc.laddr_type = SCTP_IPV4_ADDRESS;
5626 /* scope_id is only for v6 */
5628 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5629 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5634 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5635 /* Must use the address in this case */
5636 if (sctp_is_address_on_local_host(src, vrf_id)) {
5637 stc.loopback_scope = 1;
5640 stc.local_scope = 0;
5648 stc.addr_type = SCTP_IPV6_ADDRESS;
5649 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5650 stc.scope_id = in6_getscope(&src6->sin6_addr);
5651 if (sctp_is_address_on_local_host(src, vrf_id)) {
5652 stc.loopback_scope = 1;
5653 stc.local_scope = 0;
5656 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5658 * If the new destination is a
5659 * LINK_LOCAL we must have common
5660 * both site and local scope. Don't
5661 * set local scope though since we
5662 * must depend on the source to be
5663 * added implicitly. We cannot
5664 * assure just because we share one
5665 * link that all links are common.
5667 stc.local_scope = 0;
5671 * we start counting for the private
5672 * address stuff at 1. since the
5673 * link local we source from won't
5674 * show up in our scoped count.
5678 * pull out the scope_id from
5681 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5683 * If the new destination is
5684 * SITE_LOCAL then we must have site
5689 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5690 stc.laddr_type = SCTP_IPV6_ADDRESS;
5700 /* set the scope per the existing tcb */
5703 struct sctp_nets *lnet;
5707 stc.loopback_scope = asoc->scope.loopback_scope;
5708 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5709 stc.site_scope = asoc->scope.site_scope;
5710 stc.local_scope = asoc->scope.local_scope;
5712 /* Why do we not consider IPv4 LL addresses? */
5713 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5714 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5715 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5717 * if we have a LL address, start
5725 /* use the net pointer */
5726 to = (struct sockaddr *)&net->ro._l_addr;
5727 switch (to->sa_family) {
5730 sin = (struct sockaddr_in *)to;
5731 stc.address[0] = sin->sin_addr.s_addr;
5735 stc.addr_type = SCTP_IPV4_ADDRESS;
5736 if (net->src_addr_selected == 0) {
5738 * strange case here, the INIT should have
5739 * did the selection.
5741 net->ro._s_addr = sctp_source_address_selection(inp,
5742 stcb, (sctp_route_t *) & net->ro,
5744 if (net->ro._s_addr == NULL)
5747 net->src_addr_selected = 1;
5750 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5751 stc.laddress[1] = 0;
5752 stc.laddress[2] = 0;
5753 stc.laddress[3] = 0;
5754 stc.laddr_type = SCTP_IPV4_ADDRESS;
5755 /* scope_id is only for v6 */
5761 sin6 = (struct sockaddr_in6 *)to;
5762 memcpy(&stc.address, &sin6->sin6_addr,
5763 sizeof(struct in6_addr));
5764 stc.addr_type = SCTP_IPV6_ADDRESS;
5765 stc.scope_id = sin6->sin6_scope_id;
5766 if (net->src_addr_selected == 0) {
5768 * strange case here, the INIT should have
5769 * done the selection.
5771 net->ro._s_addr = sctp_source_address_selection(inp,
5772 stcb, (sctp_route_t *) & net->ro,
5774 if (net->ro._s_addr == NULL)
5777 net->src_addr_selected = 1;
5779 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5780 sizeof(struct in6_addr));
5781 stc.laddr_type = SCTP_IPV6_ADDRESS;
5786 /* Now lets put the SCTP header in place */
5787 initack = mtod(m, struct sctp_init_ack_chunk *);
5788 /* Save it off for quick ref */
5789 stc.peers_vtag = init_chk->init.initiate_tag;
5791 memcpy(stc.identification, SCTP_VERSION_STRING,
5792 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5793 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5794 /* now the chunk header */
5795 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5796 initack->ch.chunk_flags = 0;
5797 /* fill in later from mbuf we build */
5798 initack->ch.chunk_length = 0;
5799 /* place in my tag */
5800 if ((asoc != NULL) &&
5801 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5802 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5803 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5804 /* re-use the v-tags and init-seq here */
5805 initack->init.initiate_tag = htonl(asoc->my_vtag);
5806 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5808 uint32_t vtag, itsn;
5810 if (hold_inp_lock) {
5811 SCTP_INP_INCR_REF(inp);
5812 SCTP_INP_RUNLOCK(inp);
5815 atomic_add_int(&asoc->refcnt, 1);
5816 SCTP_TCB_UNLOCK(stcb);
5818 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5819 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5821 * Got a duplicate vtag on some guy behind a
5822 * nat make sure we don't use it.
5826 initack->init.initiate_tag = htonl(vtag);
5827 /* get a TSN to use too */
5828 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5829 initack->init.initial_tsn = htonl(itsn);
5830 SCTP_TCB_LOCK(stcb);
5831 atomic_add_int(&asoc->refcnt, -1);
5833 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5834 initack->init.initiate_tag = htonl(vtag);
5835 /* get a TSN to use too */
5836 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5838 if (hold_inp_lock) {
5839 SCTP_INP_RLOCK(inp);
5840 SCTP_INP_DECR_REF(inp);
5843 /* save away my tag to */
5844 stc.my_vtag = initack->init.initiate_tag;
5846 /* set up some of the credits. */
5847 so = inp->sctp_socket;
5849 /* memory problem */
5853 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5855 /* set what I want */
5856 his_limit = ntohs(init_chk->init.num_inbound_streams);
5857 /* choose what I want */
5859 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5860 i_want = asoc->streamoutcnt;
5862 i_want = inp->sctp_ep.pre_open_stream_count;
5865 i_want = inp->sctp_ep.pre_open_stream_count;
5867 if (his_limit < i_want) {
5868 /* I Want more :< */
5869 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5871 /* I can have what I want :> */
5872 initack->init.num_outbound_streams = htons(i_want);
5874 /* tell him his limit. */
5875 initack->init.num_inbound_streams =
5876 htons(inp->sctp_ep.max_open_streams_intome);
5878 /* adaptation layer indication parameter */
5879 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5880 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5881 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5882 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5883 ali->ph.param_length = htons(parameter_len);
5884 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5885 chunk_len += parameter_len;
5888 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5889 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5890 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5891 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5892 ph->param_type = htons(SCTP_ECN_CAPABLE);
5893 ph->param_length = htons(parameter_len);
5894 chunk_len += parameter_len;
5896 /* PR-SCTP supported parameter */
5897 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5898 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5899 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5900 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5901 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5902 ph->param_length = htons(parameter_len);
5903 chunk_len += parameter_len;
5905 /* Add NAT friendly parameter */
5907 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5908 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5909 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5910 ph->param_length = htons(parameter_len);
5911 chunk_len += parameter_len;
5913 /* And now tell the peer which extensions we support */
5915 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5916 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5917 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5918 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5920 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5921 ((asoc == NULL) && (inp->auth_supported == 1))) {
5922 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5924 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5925 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5926 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5927 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5929 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5930 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5931 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5933 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5934 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5935 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5937 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5938 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5939 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5942 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5943 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5944 pr_supported->ph.param_length = htons(parameter_len);
5945 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5946 chunk_len += parameter_len;
5948 /* add authentication parameters */
5949 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5950 ((asoc == NULL) && (inp->auth_supported == 1))) {
5951 struct sctp_auth_random *randp;
5952 struct sctp_auth_hmac_algo *hmacs;
5953 struct sctp_auth_chunk_list *chunks;
5955 if (padding_len > 0) {
5956 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5957 chunk_len += padding_len;
5960 /* generate and add RANDOM parameter */
5961 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5962 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5963 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5964 randp->ph.param_type = htons(SCTP_RANDOM);
5965 randp->ph.param_length = htons(parameter_len);
5966 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5967 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5968 chunk_len += parameter_len;
5970 if (padding_len > 0) {
5971 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5972 chunk_len += padding_len;
5975 /* add HMAC_ALGO parameter */
5976 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5977 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
5978 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5979 (uint8_t *) hmacs->hmac_ids);
5980 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5981 hmacs->ph.param_length = htons(parameter_len);
5982 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5983 chunk_len += parameter_len;
5985 if (padding_len > 0) {
5986 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5987 chunk_len += padding_len;
5990 /* add CHUNKS parameter */
5991 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5992 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
5993 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5994 chunks->chunk_types);
5995 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5996 chunks->ph.param_length = htons(parameter_len);
5997 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5998 chunk_len += parameter_len;
6000 SCTP_BUF_LEN(m) = chunk_len;
6002 /* now the addresses */
6004 * To optimize this we could put the scoping stuff into a structure
6005 * and remove the individual uint8's from the stc structure. Then we
6006 * could just sifa in the address within the stc.. but for now this
6007 * is a quick hack to get the address stuff teased apart.
6009 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6010 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6011 scp.loopback_scope = stc.loopback_scope;
6012 scp.ipv4_local_scope = stc.ipv4_scope;
6013 scp.local_scope = stc.local_scope;
6014 scp.site_scope = stc.site_scope;
6015 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6017 &padding_len, &chunk_len);
6018 /* padding_len can only be positive, if no addresses have been added */
6019 if (padding_len > 0) {
6020 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6021 chunk_len += padding_len;
6022 SCTP_BUF_LEN(m) += padding_len;
6025 /* tack on the operational error if present */
6028 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6029 parameter_len += SCTP_BUF_LEN(m_tmp);
6031 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6032 SCTP_BUF_NEXT(m_last) = op_err;
6033 while (SCTP_BUF_NEXT(m_last) != NULL) {
6034 m_last = SCTP_BUF_NEXT(m_last);
6036 chunk_len += parameter_len;
6038 if (padding_len > 0) {
6039 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6040 if (m_last == NULL) {
6041 /* Houston we have a problem, no space */
6045 chunk_len += padding_len;
6048 /* Now we must build a cookie */
6049 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6050 if (m_cookie == NULL) {
6051 /* memory problem */
6055 /* Now append the cookie to the end and update the space/size */
6056 SCTP_BUF_NEXT(m_last) = m_cookie;
6058 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6059 parameter_len += SCTP_BUF_LEN(m_tmp);
6060 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6064 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6065 chunk_len += parameter_len;
6068 * Place in the size, but we don't include the last pad (if any) in
6071 initack->ch.chunk_length = htons(chunk_len);
6074 * Time to sign the cookie, we don't sign over the cookie signature
6075 * though thus we set trailer.
6077 (void)sctp_hmac_m(SCTP_HMAC,
6078 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6079 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6080 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6082 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6083 * here since the timer will drive a retranmission.
6085 if (padding_len > 0) {
6086 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6091 if (stc.loopback_scope) {
6092 over_addr = (union sctp_sockstore *)dst;
6097 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6099 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6102 SCTP_SO_NOT_LOCKED);
6103 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6108 sctp_prune_prsctp(struct sctp_tcb *stcb,
6109 struct sctp_association *asoc,
6110 struct sctp_sndrcvinfo *srcv,
6114 struct sctp_tmit_chunk *chk, *nchk;
6116 SCTP_TCB_LOCK_ASSERT(stcb);
6117 if ((asoc->prsctp_supported) &&
6118 (asoc->sent_queue_cnt_removeable > 0)) {
6119 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6121 * Look for chunks marked with the PR_SCTP flag AND
6122 * the buffer space flag. If the one being sent is
6123 * equal or greater priority then purge the old one
6124 * and free some space.
6126 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6128 * This one is PR-SCTP AND buffer space
6131 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6133 * Lower numbers equates to higher
6134 * priority so if the one we are
6135 * looking at has a larger or equal
6136 * priority we want to drop the data
6137 * and NOT retransmit it.
6141 * We release the book_size
6142 * if the mbuf is here
6147 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6151 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6154 freed_spc += ret_spc;
6155 if (freed_spc >= dataout) {
6158 } /* if chunk was present */
6159 } /* if of sufficent priority */
6160 } /* if chunk has enabled */
6161 } /* tailqforeach */
6163 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6164 /* Here we must move to the sent queue and mark */
6165 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6166 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6169 * We release the book_size
6170 * if the mbuf is here
6174 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6177 freed_spc += ret_spc;
6178 if (freed_spc >= dataout) {
6181 } /* end if chk->data */
6182 } /* end if right class */
6183 } /* end if chk pr-sctp */
6184 } /* tailqforeachsafe (chk) */
6185 } /* if enabled in asoc */
6189 sctp_get_frag_point(struct sctp_tcb *stcb,
6190 struct sctp_association *asoc)
6195 * For endpoints that have both v6 and v4 addresses we must reserve
6196 * room for the ipv6 header, for those that are only dealing with V4
6197 * we use a larger frag point.
6199 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6200 ovh = SCTP_MED_OVERHEAD;
6202 ovh = SCTP_MED_V4_OVERHEAD;
6205 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6206 siz = asoc->smallest_mtu - ovh;
6208 siz = (stcb->asoc.sctp_frag_point - ovh);
6210 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6212 /* A data chunk MUST fit in a cluster */
6213 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6216 /* adjust for an AUTH chunk if DATA requires auth */
6217 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6218 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6221 /* make it an even word boundary please */
6228 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6231 * We assume that the user wants PR_SCTP_TTL if the user provides a
6232 * positive lifetime but does not specify any PR_SCTP policy.
6234 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6235 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6236 } else if (sp->timetolive > 0) {
6237 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6238 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6242 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6243 case CHUNK_FLAGS_PR_SCTP_BUF:
6245 * Time to live is a priority stored in tv_sec when doing
6246 * the buffer drop thing.
6248 sp->ts.tv_sec = sp->timetolive;
6251 case CHUNK_FLAGS_PR_SCTP_TTL:
6255 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6256 tv.tv_sec = sp->timetolive / 1000;
6257 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6259 * TODO sctp_constants.h needs alternative time
6260 * macros when _KERNEL is undefined.
6262 timevaladd(&sp->ts, &tv);
6265 case CHUNK_FLAGS_PR_SCTP_RTX:
6267 * Time to live is a the number or retransmissions stored in
6270 sp->ts.tv_sec = sp->timetolive;
6274 SCTPDBG(SCTP_DEBUG_USRREQ1,
6275 "Unknown PR_SCTP policy %u.\n",
6276 PR_SCTP_POLICY(sp->sinfo_flags));
6282 sctp_msg_append(struct sctp_tcb *stcb,
6283 struct sctp_nets *net,
6285 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6289 struct sctp_stream_queue_pending *sp = NULL;
6290 struct sctp_stream_out *strm;
6293 * Given an mbuf chain, put it into the association send queue and
6294 * place it on the wheel
6296 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6297 /* Invalid stream number */
6298 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6302 if ((stcb->asoc.stream_locked) &&
6303 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6304 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6308 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6309 /* Now can we send this? */
6310 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6311 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6312 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6313 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6314 /* got data while shutting down */
6315 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6319 sctp_alloc_a_strmoq(stcb, sp);
6321 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6325 sp->sinfo_flags = srcv->sinfo_flags;
6326 sp->timetolive = srcv->sinfo_timetolive;
6327 sp->ppid = srcv->sinfo_ppid;
6328 sp->context = srcv->sinfo_context;
6329 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6331 atomic_add_int(&sp->net->ref_count, 1);
6335 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6336 sp->stream = srcv->sinfo_stream;
6337 sp->msg_is_complete = 1;
6338 sp->sender_all_done = 1;
6341 sp->tail_mbuf = NULL;
6342 sctp_set_prsctp_policy(sp);
6344 * We could in theory (for sendall) sifa the length in, but we would
6345 * still have to hunt through the chain since we need to setup the
6349 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6350 if (SCTP_BUF_NEXT(at) == NULL)
6352 sp->length += SCTP_BUF_LEN(at);
6354 if (srcv->sinfo_keynumber_valid) {
6355 sp->auth_keyid = srcv->sinfo_keynumber;
6357 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6359 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6360 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6361 sp->holds_key_ref = 1;
6363 if (hold_stcb_lock == 0) {
6364 SCTP_TCB_SEND_LOCK(stcb);
6366 sctp_snd_sb_alloc(stcb, sp->length);
6367 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6368 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6369 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6371 if (hold_stcb_lock == 0) {
6372 SCTP_TCB_SEND_UNLOCK(stcb);
6382 static struct mbuf *
6383 sctp_copy_mbufchain(struct mbuf *clonechain,
6384 struct mbuf *outchain,
6385 struct mbuf **endofchain,
6388 uint8_t copy_by_ref)
6391 struct mbuf *appendchain;
6395 if (endofchain == NULL) {
6399 sctp_m_freem(outchain);
6402 if (can_take_mbuf) {
6403 appendchain = clonechain;
6406 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6408 /* Its not in a cluster */
6409 if (*endofchain == NULL) {
6410 /* lets get a mbuf cluster */
6411 if (outchain == NULL) {
6412 /* This is the general case */
6414 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6415 if (outchain == NULL) {
6418 SCTP_BUF_LEN(outchain) = 0;
6419 *endofchain = outchain;
6420 /* get the prepend space */
6421 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6424 * We really should not get a NULL
6430 if (SCTP_BUF_NEXT(m) == NULL) {
6434 m = SCTP_BUF_NEXT(m);
6437 if (*endofchain == NULL) {
6439 * huh, TSNH XXX maybe we
6442 sctp_m_freem(outchain);
6446 /* get the new end of length */
6447 len = M_TRAILINGSPACE(*endofchain);
6449 /* how much is left at the end? */
6450 len = M_TRAILINGSPACE(*endofchain);
6452 /* Find the end of the data, for appending */
6453 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6455 /* Now lets copy it out */
6456 if (len >= sizeofcpy) {
6457 /* It all fits, copy it in */
6458 m_copydata(clonechain, 0, sizeofcpy, cp);
6459 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6461 /* fill up the end of the chain */
6463 m_copydata(clonechain, 0, len, cp);
6464 SCTP_BUF_LEN((*endofchain)) += len;
6465 /* now we need another one */
6468 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6473 SCTP_BUF_NEXT((*endofchain)) = m;
6475 cp = mtod((*endofchain), caddr_t);
6476 m_copydata(clonechain, len, sizeofcpy, cp);
6477 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6481 /* copy the old fashion way */
6482 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6483 #ifdef SCTP_MBUF_LOGGING
6484 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6487 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6488 if (SCTP_BUF_IS_EXTENDED(mat)) {
6489 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6496 if (appendchain == NULL) {
6499 sctp_m_freem(outchain);
6503 /* tack on to the end */
6504 if (*endofchain != NULL) {
6505 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6509 if (SCTP_BUF_NEXT(m) == NULL) {
6510 SCTP_BUF_NEXT(m) = appendchain;
6513 m = SCTP_BUF_NEXT(m);
6517 * save off the end and update the end-chain postion
6521 if (SCTP_BUF_NEXT(m) == NULL) {
6525 m = SCTP_BUF_NEXT(m);
6529 /* save off the end and update the end-chain postion */
6532 if (SCTP_BUF_NEXT(m) == NULL) {
6536 m = SCTP_BUF_NEXT(m);
6538 return (appendchain);
6543 sctp_med_chunk_output(struct sctp_inpcb *inp,
6544 struct sctp_tcb *stcb,
6545 struct sctp_association *asoc,
6548 int control_only, int from_where,
6549 struct timeval *now, int *now_filled, int frag_point, int so_locked
6550 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6556 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6557 uint32_t val SCTP_UNUSED)
6559 struct sctp_copy_all *ca;
6562 int added_control = 0;
6563 int un_sent, do_chunk_output = 1;
6564 struct sctp_association *asoc;
6565 struct sctp_nets *net;
6567 ca = (struct sctp_copy_all *)ptr;
6568 if (ca->m == NULL) {
6571 if (ca->inp != inp) {
6575 if (ca->sndlen > 0) {
6576 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6578 /* can't copy so we are done */
6582 #ifdef SCTP_MBUF_LOGGING
6583 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6586 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6587 if (SCTP_BUF_IS_EXTENDED(mat)) {
6588 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6596 SCTP_TCB_LOCK_ASSERT(stcb);
6597 if (stcb->asoc.alternate) {
6598 net = stcb->asoc.alternate;
6600 net = stcb->asoc.primary_destination;
6602 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6603 /* Abort this assoc with m as the user defined reason */
6605 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6607 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6608 0, M_NOWAIT, 1, MT_DATA);
6609 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6612 struct sctp_paramhdr *ph;
6614 ph = mtod(m, struct sctp_paramhdr *);
6615 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6616 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6619 * We add one here to keep the assoc from dis-appearing on
6622 atomic_add_int(&stcb->asoc.refcnt, 1);
6623 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6625 * sctp_abort_an_association calls sctp_free_asoc() free
6626 * association will NOT free it since we incremented the
6627 * refcnt .. we do this to prevent it being freed and things
6628 * getting tricky since we could end up (from free_asoc)
6629 * calling inpcb_free which would get a recursive lock call
6630 * to the iterator lock.. But as a consequence of that the
6631 * stcb will return to us un-locked.. since free_asoc
6632 * returns with either no TCB or the TCB unlocked, we must
6633 * relock.. to unlock in the iterator timer :-0
6635 SCTP_TCB_LOCK(stcb);
6636 atomic_add_int(&stcb->asoc.refcnt, -1);
6637 goto no_chunk_output;
6640 ret = sctp_msg_append(stcb, net, m,
6644 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6645 /* shutdown this assoc */
6648 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6650 if (TAILQ_EMPTY(&asoc->send_queue) &&
6651 TAILQ_EMPTY(&asoc->sent_queue) &&
6653 if (asoc->locked_on_sending) {
6657 * there is nothing queued to send, so I'm
6660 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6661 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6662 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6664 * only send SHUTDOWN the first time
6667 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6668 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6670 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6671 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6672 sctp_stop_timers_for_shutdown(stcb);
6673 sctp_send_shutdown(stcb, net);
6674 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6676 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6677 asoc->primary_destination);
6679 do_chunk_output = 0;
6683 * we still got (or just got) data to send,
6684 * so set SHUTDOWN_PENDING
6687 * XXX sockets draft says that SCTP_EOF
6688 * should be sent with no data. currently,
6689 * we will allow user data to be sent first
6690 * and move to SHUTDOWN-PENDING
6692 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6693 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6694 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6695 if (asoc->locked_on_sending) {
6697 * Locked to send out the
6700 struct sctp_stream_queue_pending *sp;
6702 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6704 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6705 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6708 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6709 if (TAILQ_EMPTY(&asoc->send_queue) &&
6710 TAILQ_EMPTY(&asoc->sent_queue) &&
6711 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6713 atomic_add_int(&stcb->asoc.refcnt, 1);
6714 sctp_abort_an_association(stcb->sctp_ep, stcb,
6715 NULL, SCTP_SO_NOT_LOCKED);
6716 atomic_add_int(&stcb->asoc.refcnt, -1);
6717 goto no_chunk_output;
6719 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6720 asoc->primary_destination);
6726 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6727 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6729 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6730 (stcb->asoc.total_flight > 0) &&
6731 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6732 do_chunk_output = 0;
6734 if (do_chunk_output)
6735 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6736 else if (added_control) {
6737 int num_out, reason, now_filled = 0;
6741 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6742 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6743 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6754 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6756 struct sctp_copy_all *ca;
6758 ca = (struct sctp_copy_all *)ptr;
6760 * Do a notify here? Kacheong suggests that the notify be done at
6761 * the send time.. so you would push up a notification if any send
6762 * failed. Don't know if this is feasable since the only failures we
6763 * have is "memory" related and if you cannot get an mbuf to send
6764 * the data you surely can't get an mbuf to send up to notify the
6765 * user you can't send the data :->
6768 /* now free everything */
6769 sctp_m_freem(ca->m);
6770 SCTP_FREE(ca, SCTP_M_COPYAL);
6773 static struct mbuf *
6774 sctp_copy_out_all(struct uio *uio, int len)
6776 struct mbuf *ret, *at;
6777 int left, willcpy, cancpy, error;
6779 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6785 SCTP_BUF_LEN(ret) = 0;
6786 /* save space for the data chunk header */
6787 cancpy = M_TRAILINGSPACE(ret);
6788 willcpy = min(cancpy, left);
6791 /* Align data to the end */
6792 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6798 SCTP_BUF_LEN(at) = willcpy;
6799 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6802 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6803 if (SCTP_BUF_NEXT(at) == NULL) {
6806 at = SCTP_BUF_NEXT(at);
6807 SCTP_BUF_LEN(at) = 0;
6808 cancpy = M_TRAILINGSPACE(at);
6809 willcpy = min(cancpy, left);
6816 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6817 struct sctp_sndrcvinfo *srcv)
6820 struct sctp_copy_all *ca;
6822 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6829 memset(ca, 0, sizeof(struct sctp_copy_all));
6833 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6836 * take off the sendall flag, it would be bad if we failed to do
6839 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6840 /* get length and mbuf chain */
6842 ca->sndlen = uio->uio_resid;
6843 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6844 if (ca->m == NULL) {
6845 SCTP_FREE(ca, SCTP_M_COPYAL);
6846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6850 /* Gather the length of the send */
6854 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6855 ca->sndlen += SCTP_BUF_LEN(mat);
6858 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6859 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6860 SCTP_ASOC_ANY_STATE,
6862 sctp_sendall_completes, inp, 1);
6864 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6865 SCTP_FREE(ca, SCTP_M_COPYAL);
6866 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6874 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6876 struct sctp_tmit_chunk *chk, *nchk;
6878 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6879 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6880 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6882 sctp_m_freem(chk->data);
6885 asoc->ctrl_queue_cnt--;
6886 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6892 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6894 struct sctp_association *asoc;
6895 struct sctp_tmit_chunk *chk, *nchk;
6896 struct sctp_asconf_chunk *acp;
6899 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6900 /* find SCTP_ASCONF chunk in queue */
6901 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6903 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6904 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6909 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6911 sctp_m_freem(chk->data);
6914 asoc->ctrl_queue_cnt--;
6915 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6922 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6923 struct sctp_association *asoc,
6924 struct sctp_tmit_chunk **data_list,
6926 struct sctp_nets *net)
6929 struct sctp_tmit_chunk *tp1;
6931 for (i = 0; i < bundle_at; i++) {
6932 /* off of the send queue */
6933 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6934 asoc->send_queue_cnt--;
6937 * Any chunk NOT 0 you zap the time chunk 0 gets
6938 * zapped or set based on if a RTO measurment is
6941 data_list[i]->do_rtt = 0;
6944 data_list[i]->sent_rcv_time = net->last_sent_time;
6945 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6946 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6947 if (data_list[i]->whoTo == NULL) {
6948 data_list[i]->whoTo = net;
6949 atomic_add_int(&net->ref_count, 1);
6951 /* on to the sent queue */
6952 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6953 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6954 struct sctp_tmit_chunk *tpp;
6956 /* need to move back */
6958 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6960 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6964 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6967 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6969 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6974 /* This does not lower until the cum-ack passes it */
6975 asoc->sent_queue_cnt++;
6976 if ((asoc->peers_rwnd <= 0) &&
6977 (asoc->total_flight == 0) &&
6979 /* Mark the chunk as being a window probe */
6980 SCTP_STAT_INCR(sctps_windowprobed);
6982 #ifdef SCTP_AUDITING_ENABLED
6983 sctp_audit_log(0xC2, 3);
6985 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6986 data_list[i]->snd_count = 1;
6987 data_list[i]->rec.data.chunk_was_revoked = 0;
6988 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6989 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6990 data_list[i]->whoTo->flight_size,
6991 data_list[i]->book_size,
6992 (uintptr_t) data_list[i]->whoTo,
6993 data_list[i]->rec.data.TSN_seq);
6995 sctp_flight_size_increase(data_list[i]);
6996 sctp_total_flight_increase(stcb, data_list[i]);
6997 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6998 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6999 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7001 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7002 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7003 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7004 /* SWS sender side engages */
7005 asoc->peers_rwnd = 0;
7008 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7009 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7014 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7015 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7020 struct sctp_tmit_chunk *chk, *nchk;
7022 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7023 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7024 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7025 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7026 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7027 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7028 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7029 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7030 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7031 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7032 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7033 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7034 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7035 /* Stray chunks must be cleaned up */
7037 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7039 sctp_m_freem(chk->data);
7042 asoc->ctrl_queue_cnt--;
7043 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7044 asoc->fwd_tsn_cnt--;
7045 sctp_free_a_chunk(stcb, chk, so_locked);
7046 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7047 /* special handling, we must look into the param */
7048 if (chk != asoc->str_reset) {
7049 goto clean_up_anyway;
7057 sctp_can_we_split_this(struct sctp_tcb *stcb,
7059 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7062 * Make a decision on if I should split a msg into multiple parts.
7063 * This is only asked of incomplete messages.
7067 * If we are doing EEOR we need to always send it if its the
7068 * entire thing, since it might be all the guy is putting in
7071 if (goal_mtu >= length) {
7073 * If we have data outstanding,
7074 * we get another chance when the sack
7075 * arrives to transmit - wait for more data
7077 if (stcb->asoc.total_flight == 0) {
7079 * If nothing is in flight, we zero the
7087 /* You can fill the rest */
7092 * For those strange folk that make the send buffer
7093 * smaller than our fragmentation point, we can't
7094 * get a full msg in so we have to allow splitting.
7096 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7099 if ((length <= goal_mtu) ||
7100 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7101 /* Sub-optimial residual don't split in non-eeor mode. */
7105 * If we reach here length is larger than the goal_mtu. Do we wish
7106 * to split it for the sake of packet putting together?
7108 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7109 /* Its ok to split it */
7110 return (min(goal_mtu, frag_point));
7112 /* Nope, can't split */
7118 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7119 struct sctp_stream_out *strq,
7121 uint32_t frag_point,
7127 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7132 /* Move from the stream to the send_queue keeping track of the total */
7133 struct sctp_association *asoc;
7134 struct sctp_stream_queue_pending *sp;
7135 struct sctp_tmit_chunk *chk;
7136 struct sctp_data_chunk *dchkh;
7137 uint32_t to_move, length;
7138 uint8_t rcv_flags = 0;
7140 uint8_t send_lock_up = 0;
7142 SCTP_TCB_LOCK_ASSERT(stcb);
7145 /* sa_ignore FREED_MEMORY */
7146 sp = TAILQ_FIRST(&strq->outqueue);
7149 if (send_lock_up == 0) {
7150 SCTP_TCB_SEND_LOCK(stcb);
7153 sp = TAILQ_FIRST(&strq->outqueue);
7157 if (strq->last_msg_incomplete) {
7158 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7160 strq->last_msg_incomplete);
7161 strq->last_msg_incomplete = 0;
7165 SCTP_TCB_SEND_UNLOCK(stcb);
7170 if ((sp->msg_is_complete) && (sp->length == 0)) {
7171 if (sp->sender_all_done) {
7173 * We are doing differed cleanup. Last time through
7174 * when we took all the data the sender_all_done was
7177 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7178 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7179 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7180 sp->sender_all_done,
7182 sp->msg_is_complete,
7186 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7187 SCTP_TCB_SEND_LOCK(stcb);
7190 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7191 TAILQ_REMOVE(&strq->outqueue, sp, next);
7192 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7194 sctp_free_remote_addr(sp->net);
7198 sctp_m_freem(sp->data);
7201 sctp_free_a_strmoq(stcb, sp, so_locked);
7202 /* we can't be locked to it */
7204 stcb->asoc.locked_on_sending = NULL;
7206 SCTP_TCB_SEND_UNLOCK(stcb);
7209 /* back to get the next msg */
7213 * sender just finished this but still holds a
7222 /* is there some to get */
7223 if (sp->length == 0) {
7229 } else if (sp->discard_rest) {
7230 if (send_lock_up == 0) {
7231 SCTP_TCB_SEND_LOCK(stcb);
7234 /* Whack down the size */
7235 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7236 if ((stcb->sctp_socket != NULL) && \
7237 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7238 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7239 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7242 sctp_m_freem(sp->data);
7244 sp->tail_mbuf = NULL;
7254 some_taken = sp->some_taken;
7255 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7256 sp->msg_is_complete = 1;
7259 length = sp->length;
7260 if (sp->msg_is_complete) {
7261 /* The message is complete */
7262 to_move = min(length, frag_point);
7263 if (to_move == length) {
7264 /* All of it fits in the MTU */
7265 if (sp->some_taken) {
7266 rcv_flags |= SCTP_DATA_LAST_FRAG;
7267 sp->put_last_out = 1;
7269 rcv_flags |= SCTP_DATA_NOT_FRAG;
7270 sp->put_last_out = 1;
7273 /* Not all of it fits, we fragment */
7274 if (sp->some_taken == 0) {
7275 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7280 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7283 * We use a snapshot of length in case it
7284 * is expanding during the compare.
7289 if (to_move >= llen) {
7291 if (send_lock_up == 0) {
7293 * We are taking all of an incomplete msg
7294 * thus we need a send lock.
7296 SCTP_TCB_SEND_LOCK(stcb);
7298 if (sp->msg_is_complete) {
7300 * the sender finished the
7307 if (sp->some_taken == 0) {
7308 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7312 /* Nothing to take. */
7313 if (sp->some_taken) {
7322 /* If we reach here, we can copy out a chunk */
7323 sctp_alloc_a_chunk(stcb, chk);
7325 /* No chunk memory */
7331 * Setup for unordered if needed by looking at the user sent info
7334 if (sp->sinfo_flags & SCTP_UNORDERED) {
7335 rcv_flags |= SCTP_DATA_UNORDERED;
7337 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7338 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7339 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7341 /* clear out the chunk before setting up */
7342 memset(chk, 0, sizeof(*chk));
7343 chk->rec.data.rcv_flags = rcv_flags;
7345 if (to_move >= length) {
7346 /* we think we can steal the whole thing */
7347 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7348 SCTP_TCB_SEND_LOCK(stcb);
7351 if (to_move < sp->length) {
7352 /* bail, it changed */
7355 chk->data = sp->data;
7356 chk->last_mbuf = sp->tail_mbuf;
7357 /* register the stealing */
7358 sp->data = sp->tail_mbuf = NULL;
7363 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7364 chk->last_mbuf = NULL;
7365 if (chk->data == NULL) {
7366 sp->some_taken = some_taken;
7367 sctp_free_a_chunk(stcb, chk, so_locked);
7372 #ifdef SCTP_MBUF_LOGGING
7373 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7376 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7377 if (SCTP_BUF_IS_EXTENDED(mat)) {
7378 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7383 /* Pull off the data */
7384 m_adj(sp->data, to_move);
7385 /* Now lets work our way down and compact it */
7387 while (m && (SCTP_BUF_LEN(m) == 0)) {
7388 sp->data = SCTP_BUF_NEXT(m);
7389 SCTP_BUF_NEXT(m) = NULL;
7390 if (sp->tail_mbuf == m) {
7392 * Freeing tail? TSNH since
7393 * we supposedly were taking less
7394 * than the sp->length.
7397 panic("Huh, freing tail? - TSNH");
7399 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7400 sp->tail_mbuf = sp->data = NULL;
7409 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7410 chk->copy_by_ref = 1;
7412 chk->copy_by_ref = 0;
7415 * get last_mbuf and counts of mb useage This is ugly but hopefully
7416 * its only one mbuf.
7418 if (chk->last_mbuf == NULL) {
7419 chk->last_mbuf = chk->data;
7420 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7421 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7424 if (to_move > length) {
7425 /*- This should not happen either
7426 * since we always lower to_move to the size
7427 * of sp->length if its larger.
7430 panic("Huh, how can to_move be larger?");
7432 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7436 atomic_subtract_int(&sp->length, to_move);
7438 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7439 /* Not enough room for a chunk header, get some */
7442 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7445 * we're in trouble here. _PREPEND below will free
7446 * all the data if there is no leading space, so we
7447 * must put the data back and restore.
7449 if (send_lock_up == 0) {
7450 SCTP_TCB_SEND_LOCK(stcb);
7453 if (chk->data == NULL) {
7454 /* unsteal the data */
7455 sp->data = chk->data;
7456 sp->tail_mbuf = chk->last_mbuf;
7460 /* reassemble the data */
7462 sp->data = chk->data;
7463 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7465 sp->some_taken = some_taken;
7466 atomic_add_int(&sp->length, to_move);
7469 sctp_free_a_chunk(stcb, chk, so_locked);
7473 SCTP_BUF_LEN(m) = 0;
7474 SCTP_BUF_NEXT(m) = chk->data;
7476 M_ALIGN(chk->data, 4);
7479 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7480 if (chk->data == NULL) {
7481 /* HELP, TSNH since we assured it would not above? */
7483 panic("prepend failes HELP?");
7485 SCTP_PRINTF("prepend fails HELP?\n");
7486 sctp_free_a_chunk(stcb, chk, so_locked);
7492 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7493 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7494 chk->book_size_scale = 0;
7495 chk->sent = SCTP_DATAGRAM_UNSENT;
7498 chk->asoc = &stcb->asoc;
7499 chk->pad_inplace = 0;
7500 chk->no_fr_allowed = 0;
7501 chk->rec.data.stream_seq = strq->next_sequence_send;
7502 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7503 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7504 strq->next_sequence_send++;
7506 chk->rec.data.stream_number = sp->stream;
7507 chk->rec.data.payloadtype = sp->ppid;
7508 chk->rec.data.context = sp->context;
7509 chk->rec.data.doing_fast_retransmit = 0;
7511 chk->rec.data.timetodrop = sp->ts;
7512 chk->flags = sp->act_flags;
7515 chk->whoTo = sp->net;
7516 atomic_add_int(&chk->whoTo->ref_count, 1);
7520 if (sp->holds_key_ref) {
7521 chk->auth_keyid = sp->auth_keyid;
7522 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7523 chk->holds_key_ref = 1;
7525 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7526 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7527 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7528 (uintptr_t) stcb, sp->length,
7529 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7530 chk->rec.data.TSN_seq);
7532 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7534 * Put the rest of the things in place now. Size was done earlier in
7535 * previous loop prior to padding.
7538 #ifdef SCTP_ASOCLOG_OF_TSNS
7539 SCTP_TCB_LOCK_ASSERT(stcb);
7540 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7541 asoc->tsn_out_at = 0;
7542 asoc->tsn_out_wrapped = 1;
7544 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7545 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7546 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7547 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7548 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7549 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7550 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7551 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7555 dchkh->ch.chunk_type = SCTP_DATA;
7556 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7557 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7558 dchkh->dp.stream_id = htons(strq->stream_no);
7559 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7560 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7561 dchkh->ch.chunk_length = htons(chk->send_size);
7562 /* Now advance the chk->send_size by the actual pad needed. */
7563 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7568 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7569 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7571 chk->last_mbuf = lm;
7572 chk->pad_inplace = 1;
7574 chk->send_size += pads;
7576 if (PR_SCTP_ENABLED(chk->flags)) {
7577 asoc->pr_sctp_cnt++;
7579 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7580 /* All done pull and kill the message */
7581 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7582 if (sp->put_last_out == 0) {
7583 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7584 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7585 sp->sender_all_done,
7587 sp->msg_is_complete,
7591 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7592 SCTP_TCB_SEND_LOCK(stcb);
7595 TAILQ_REMOVE(&strq->outqueue, sp, next);
7596 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7598 sctp_free_remote_addr(sp->net);
7602 sctp_m_freem(sp->data);
7605 sctp_free_a_strmoq(stcb, sp, so_locked);
7607 /* we can't be locked to it */
7609 stcb->asoc.locked_on_sending = NULL;
7611 /* more to go, we are locked */
7614 asoc->chunks_on_out_queue++;
7615 strq->chunks_on_queues++;
7616 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7617 asoc->send_queue_cnt++;
7620 SCTP_TCB_SEND_UNLOCK(stcb);
7627 sctp_fill_outqueue(struct sctp_tcb *stcb,
7628 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7629 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7634 struct sctp_association *asoc;
7635 struct sctp_stream_out *strq;
7636 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7639 SCTP_TCB_LOCK_ASSERT(stcb);
7641 switch (net->ro._l_addr.sa.sa_family) {
7644 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7649 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7654 goal_mtu = net->mtu;
7657 /* Need an allowance for the data chunk header too */
7658 goal_mtu -= sizeof(struct sctp_data_chunk);
7660 /* must make even word boundary */
7661 goal_mtu &= 0xfffffffc;
7662 if (asoc->locked_on_sending) {
7663 /* We are stuck on one stream until the message completes. */
7664 strq = asoc->locked_on_sending;
7667 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7670 while ((goal_mtu > 0) && strq) {
7673 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7674 &giveup, eeor_mode, &bail, so_locked);
7676 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7679 asoc->locked_on_sending = strq;
7680 if ((moved_how_much == 0) || (giveup) || bail)
7681 /* no more to move for now */
7684 asoc->locked_on_sending = NULL;
7685 if ((giveup) || bail) {
7688 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7693 total_moved += moved_how_much;
7694 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7695 goal_mtu &= 0xfffffffc;
7700 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7702 if (total_moved == 0) {
7703 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7704 (net == stcb->asoc.primary_destination)) {
7705 /* ran dry for primary network net */
7706 SCTP_STAT_INCR(sctps_primary_randry);
7707 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7708 /* ran dry with CMT on */
7709 SCTP_STAT_INCR(sctps_cmt_randry);
7715 sctp_fix_ecn_echo(struct sctp_association *asoc)
7717 struct sctp_tmit_chunk *chk;
7719 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7720 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7721 chk->sent = SCTP_DATAGRAM_UNSENT;
7727 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7729 struct sctp_association *asoc;
7730 struct sctp_tmit_chunk *chk;
7731 struct sctp_stream_queue_pending *sp;
7738 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7739 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7740 if (sp->net == net) {
7741 sctp_free_remote_addr(sp->net);
7746 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7747 if (chk->whoTo == net) {
7748 sctp_free_remote_addr(chk->whoTo);
7755 sctp_med_chunk_output(struct sctp_inpcb *inp,
7756 struct sctp_tcb *stcb,
7757 struct sctp_association *asoc,
7760 int control_only, int from_where,
7761 struct timeval *now, int *now_filled, int frag_point, int so_locked
7762 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7768 * Ok this is the generic chunk service queue. we must do the
7769 * following: - Service the stream queue that is next, moving any
7770 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7771 * LAST to the out queue in one pass) and assigning TSN's - Check to
7772 * see if the cwnd/rwnd allows any output, if so we go ahead and
7773 * fomulate and send the low level chunks. Making sure to combine
7774 * any control in the control chunk queue also.
7776 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7777 struct mbuf *outchain, *endoutchain;
7778 struct sctp_tmit_chunk *chk, *nchk;
7780 /* temp arrays for unlinking */
7781 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7782 int no_fragmentflg, error;
7783 unsigned int max_rwnd_per_dest, max_send_per_dest;
7784 int one_chunk, hbflag, skip_data_for_this_net;
7785 int asconf, cookie, no_out_cnt;
7786 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7787 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7789 uint32_t auth_offset = 0;
7790 struct sctp_auth_chunk *auth = NULL;
7791 uint16_t auth_keyid;
7792 int override_ok = 1;
7793 int skip_fill_up = 0;
7794 int data_auth_reqd = 0;
7797 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7804 auth_keyid = stcb->asoc.authinfo.active_keyid;
7805 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7806 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7807 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7812 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7814 * First lets prime the pump. For each destination, if there is room
7815 * in the flight size, attempt to pull an MTU's worth out of the
7816 * stream queues into the general send_queue
7818 #ifdef SCTP_AUDITING_ENABLED
7819 sctp_audit_log(0xC2, 2);
7821 SCTP_TCB_LOCK_ASSERT(stcb);
7823 if ((control_only) || (asoc->stream_reset_outstanding))
7828 /* Nothing to possible to send? */
7829 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7830 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7831 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7832 TAILQ_EMPTY(&asoc->send_queue) &&
7833 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7838 if (asoc->peers_rwnd == 0) {
7839 /* No room in peers rwnd */
7841 if (asoc->total_flight > 0) {
7842 /* we are allowed one chunk in flight */
7846 if (stcb->asoc.ecn_echo_cnt_onq) {
7847 /* Record where a sack goes, if any */
7848 if (no_data_chunks &&
7849 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7850 /* Nothing but ECNe to send - we don't do that */
7851 goto nothing_to_send;
7853 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7854 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7855 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7856 sack_goes_to = chk->whoTo;
7861 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7862 if (stcb->sctp_socket)
7863 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7865 max_send_per_dest = 0;
7866 if (no_data_chunks == 0) {
7867 /* How many non-directed chunks are there? */
7868 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7869 if (chk->whoTo == NULL) {
7871 * We already have non-directed chunks on
7872 * the queue, no need to do a fill-up.
7880 if ((no_data_chunks == 0) &&
7881 (skip_fill_up == 0) &&
7882 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7883 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7885 * This for loop we are in takes in each net, if
7886 * its's got space in cwnd and has data sent to it
7887 * (when CMT is off) then it calls
7888 * sctp_fill_outqueue for the net. This gets data on
7889 * the send queue for that network.
7891 * In sctp_fill_outqueue TSN's are assigned and data is
7892 * copied out of the stream buffers. Note mostly
7893 * copy by reference (we hope).
7895 net->window_probe = 0;
7896 if ((net != stcb->asoc.alternate) &&
7897 ((net->dest_state & SCTP_ADDR_PF) ||
7898 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7899 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7900 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7901 sctp_log_cwnd(stcb, net, 1,
7902 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7906 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7907 (net->flight_size == 0)) {
7908 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7910 if (net->flight_size >= net->cwnd) {
7911 /* skip this network, no room - can't fill */
7912 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7913 sctp_log_cwnd(stcb, net, 3,
7914 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7918 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7919 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7921 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7923 /* memory alloc failure */
7929 /* now service each destination and send out what we can for it */
7930 /* Nothing to send? */
7931 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7932 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7933 TAILQ_EMPTY(&asoc->send_queue)) {
7937 if (asoc->sctp_cmt_on_off > 0) {
7938 /* get the last start point */
7939 start_at = asoc->last_net_cmt_send_started;
7940 if (start_at == NULL) {
7941 /* null so to beginning */
7942 start_at = TAILQ_FIRST(&asoc->nets);
7944 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7945 if (start_at == NULL) {
7946 start_at = TAILQ_FIRST(&asoc->nets);
7949 asoc->last_net_cmt_send_started = start_at;
7951 start_at = TAILQ_FIRST(&asoc->nets);
7953 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7954 if (chk->whoTo == NULL) {
7955 if (asoc->alternate) {
7956 chk->whoTo = asoc->alternate;
7958 chk->whoTo = asoc->primary_destination;
7960 atomic_add_int(&chk->whoTo->ref_count, 1);
7963 old_start_at = NULL;
7964 again_one_more_time:
7965 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7966 /* how much can we send? */
7967 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7968 if (old_start_at && (old_start_at == net)) {
7969 /* through list ocmpletely. */
7973 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7974 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7975 (net->flight_size >= net->cwnd)) {
7977 * Nothing on control or asconf and flight is full,
7978 * we can skip even in the CMT case.
7983 endoutchain = outchain = NULL;
7986 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7987 skip_data_for_this_net = 1;
7989 skip_data_for_this_net = 0;
7991 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7993 * if we have a route and an ifp check to see if we
7994 * have room to send to this guy
7998 ifp = net->ro.ro_rt->rt_ifp;
7999 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
8000 SCTP_STAT_INCR(sctps_ifnomemqueued);
8001 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
8002 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
8007 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8010 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8015 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8025 if (mtu > asoc->peers_rwnd) {
8026 if (asoc->total_flight > 0) {
8027 /* We have a packet in flight somewhere */
8028 r_mtu = asoc->peers_rwnd;
8030 /* We are always allowed to send one MTU out */
8037 /************************/
8038 /* ASCONF transmission */
8039 /************************/
8040 /* Now first lets go through the asconf queue */
8041 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8042 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8045 if (chk->whoTo == NULL) {
8046 if (asoc->alternate == NULL) {
8047 if (asoc->primary_destination != net) {
8051 if (asoc->alternate != net) {
8056 if (chk->whoTo != net) {
8060 if (chk->data == NULL) {
8063 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8064 chk->sent != SCTP_DATAGRAM_RESEND) {
8068 * if no AUTH is yet included and this chunk
8069 * requires it, make sure to account for it. We
8070 * don't apply the size until the AUTH chunk is
8071 * actually added below in case there is no room for
8072 * this chunk. NOTE: we overload the use of "omtu"
8075 if ((auth == NULL) &&
8076 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8077 stcb->asoc.peer_auth_chunks)) {
8078 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8081 /* Here we do NOT factor the r_mtu */
8082 if ((chk->send_size < (int)(mtu - omtu)) ||
8083 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8085 * We probably should glom the mbuf chain
8086 * from the chk->data for control but the
8087 * problem is it becomes yet one more level
8088 * of tracking to do if for some reason
8089 * output fails. Then I have got to
8090 * reconstruct the merged control chain.. el
8091 * yucko.. for now we take the easy way and
8095 * Add an AUTH chunk, if chunk requires it
8096 * save the offset into the chain for AUTH
8098 if ((auth == NULL) &&
8099 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8100 stcb->asoc.peer_auth_chunks))) {
8101 outchain = sctp_add_auth_chunk(outchain,
8106 chk->rec.chunk_id.id);
8107 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8109 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8110 (int)chk->rec.chunk_id.can_take_data,
8111 chk->send_size, chk->copy_by_ref);
8112 if (outchain == NULL) {
8114 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8117 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8118 /* update our MTU size */
8119 if (mtu > (chk->send_size + omtu))
8120 mtu -= (chk->send_size + omtu);
8123 to_out += (chk->send_size + omtu);
8124 /* Do clear IP_DF ? */
8125 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8128 if (chk->rec.chunk_id.can_take_data)
8131 * set hb flag since we can use these for
8137 * should sysctl this: don't bundle data
8138 * with ASCONF since it requires AUTH
8141 chk->sent = SCTP_DATAGRAM_SENT;
8142 if (chk->whoTo == NULL) {
8144 atomic_add_int(&net->ref_count, 1);
8149 * Ok we are out of room but we can
8150 * output without effecting the
8151 * flight size since this little guy
8152 * is a control only packet.
8154 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8156 * do NOT clear the asconf flag as
8157 * it is used to do appropriate
8158 * source address selection.
8160 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8161 (struct sockaddr *)&net->ro._l_addr,
8162 outchain, auth_offset, auth,
8163 stcb->asoc.authinfo.active_keyid,
8164 no_fragmentflg, 0, asconf,
8165 inp->sctp_lport, stcb->rport,
8166 htonl(stcb->asoc.peer_vtag),
8170 if (error == ENOBUFS) {
8171 asoc->ifp_had_enobuf = 1;
8172 SCTP_STAT_INCR(sctps_lowlevelerr);
8174 if (from_where == 0) {
8175 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8177 if (*now_filled == 0) {
8178 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8180 *now = net->last_sent_time;
8182 net->last_sent_time = *now;
8185 /* error, could not output */
8186 if (error == EHOSTUNREACH) {
8192 sctp_move_chunks_from_net(stcb, net);
8197 asoc->ifp_had_enobuf = 0;
8198 if (*now_filled == 0) {
8199 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8201 *now = net->last_sent_time;
8203 net->last_sent_time = *now;
8207 * increase the number we sent, if a
8208 * cookie is sent we don't tell them
8211 outchain = endoutchain = NULL;
8215 *num_out += ctl_cnt;
8216 /* recalc a clean slate and setup */
8217 switch (net->ro._l_addr.sa.sa_family) {
8220 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8225 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8238 /************************/
8239 /* Control transmission */
8240 /************************/
8241 /* Now first lets go through the control queue */
8242 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8243 if ((sack_goes_to) &&
8244 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8245 (chk->whoTo != sack_goes_to)) {
8247 * if we have a sack in queue, and we are
8248 * looking at an ecn echo that is NOT queued
8249 * to where the sack is going..
8251 if (chk->whoTo == net) {
8253 * Don't transmit it to where its
8254 * going (current net)
8257 } else if (sack_goes_to == net) {
8259 * But do transmit it to this
8262 goto skip_net_check;
8265 if (chk->whoTo == NULL) {
8266 if (asoc->alternate == NULL) {
8267 if (asoc->primary_destination != net) {
8271 if (asoc->alternate != net) {
8276 if (chk->whoTo != net) {
8281 if (chk->data == NULL) {
8284 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8286 * It must be unsent. Cookies and ASCONF's
8287 * hang around but there timers will force
8288 * when marked for resend.
8293 * if no AUTH is yet included and this chunk
8294 * requires it, make sure to account for it. We
8295 * don't apply the size until the AUTH chunk is
8296 * actually added below in case there is no room for
8297 * this chunk. NOTE: we overload the use of "omtu"
8300 if ((auth == NULL) &&
8301 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8302 stcb->asoc.peer_auth_chunks)) {
8303 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8306 /* Here we do NOT factor the r_mtu */
8307 if ((chk->send_size <= (int)(mtu - omtu)) ||
8308 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8310 * We probably should glom the mbuf chain
8311 * from the chk->data for control but the
8312 * problem is it becomes yet one more level
8313 * of tracking to do if for some reason
8314 * output fails. Then I have got to
8315 * reconstruct the merged control chain.. el
8316 * yucko.. for now we take the easy way and
8320 * Add an AUTH chunk, if chunk requires it
8321 * save the offset into the chain for AUTH
8323 if ((auth == NULL) &&
8324 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8325 stcb->asoc.peer_auth_chunks))) {
8326 outchain = sctp_add_auth_chunk(outchain,
8331 chk->rec.chunk_id.id);
8332 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8334 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8335 (int)chk->rec.chunk_id.can_take_data,
8336 chk->send_size, chk->copy_by_ref);
8337 if (outchain == NULL) {
8339 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8342 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8343 /* update our MTU size */
8344 if (mtu > (chk->send_size + omtu))
8345 mtu -= (chk->send_size + omtu);
8348 to_out += (chk->send_size + omtu);
8349 /* Do clear IP_DF ? */
8350 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8353 if (chk->rec.chunk_id.can_take_data)
8355 /* Mark things to be removed, if needed */
8356 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8357 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8358 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8359 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8360 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8361 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8362 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8363 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8364 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8365 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8366 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8367 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8370 /* remove these chunks at the end */
8371 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8372 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8373 /* turn off the timer */
8374 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8375 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8376 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8382 * Other chunks, since they have
8383 * timers running (i.e. COOKIE) we
8384 * just "trust" that it gets sent or
8388 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8391 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8393 * Increment ecne send count
8394 * here this means we may be
8395 * over-zealous in our
8396 * counting if the send
8397 * fails, but its the best
8398 * place to do it (we used
8399 * to do it in the queue of
8400 * the chunk, but that did
8401 * not tell how many times
8404 SCTP_STAT_INCR(sctps_sendecne);
8406 chk->sent = SCTP_DATAGRAM_SENT;
8407 if (chk->whoTo == NULL) {
8409 atomic_add_int(&net->ref_count, 1);
8415 * Ok we are out of room but we can
8416 * output without effecting the
8417 * flight size since this little guy
8418 * is a control only packet.
8421 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8423 * do NOT clear the asconf
8424 * flag as it is used to do
8425 * appropriate source
8426 * address selection.
8430 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8433 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8434 (struct sockaddr *)&net->ro._l_addr,
8437 stcb->asoc.authinfo.active_keyid,
8438 no_fragmentflg, 0, asconf,
8439 inp->sctp_lport, stcb->rport,
8440 htonl(stcb->asoc.peer_vtag),
8444 if (error == ENOBUFS) {
8445 asoc->ifp_had_enobuf = 1;
8446 SCTP_STAT_INCR(sctps_lowlevelerr);
8448 if (from_where == 0) {
8449 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8451 /* error, could not output */
8453 if (*now_filled == 0) {
8454 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8456 *now = net->last_sent_time;
8458 net->last_sent_time = *now;
8462 if (error == EHOSTUNREACH) {
8468 sctp_move_chunks_from_net(stcb, net);
8473 asoc->ifp_had_enobuf = 0;
8474 /* Only HB or ASCONF advances time */
8476 if (*now_filled == 0) {
8477 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8479 *now = net->last_sent_time;
8481 net->last_sent_time = *now;
8486 * increase the number we sent, if a
8487 * cookie is sent we don't tell them
8490 outchain = endoutchain = NULL;
8494 *num_out += ctl_cnt;
8495 /* recalc a clean slate and setup */
8496 switch (net->ro._l_addr.sa.sa_family) {
8499 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8504 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8517 /* JRI: if dest is in PF state, do not send data to it */
8518 if ((asoc->sctp_cmt_on_off > 0) &&
8519 (net != stcb->asoc.alternate) &&
8520 (net->dest_state & SCTP_ADDR_PF)) {
8523 if (net->flight_size >= net->cwnd) {
8526 if ((asoc->sctp_cmt_on_off > 0) &&
8527 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8528 (net->flight_size > max_rwnd_per_dest)) {
8532 * We need a specific accounting for the usage of the send
8533 * buffer. We also need to check the number of messages per
8534 * net. For now, this is better than nothing and it disabled
8537 if ((asoc->sctp_cmt_on_off > 0) &&
8538 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8539 (max_send_per_dest > 0) &&
8540 (net->flight_size > max_send_per_dest)) {
8543 /*********************/
8544 /* Data transmission */
8545 /*********************/
8547 * if AUTH for DATA is required and no AUTH has been added
8548 * yet, account for this in the mtu now... if no data can be
8549 * bundled, this adjustment won't matter anyways since the
8550 * packet will be going out...
8552 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8553 stcb->asoc.peer_auth_chunks);
8554 if (data_auth_reqd && (auth == NULL)) {
8555 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8557 /* now lets add any data within the MTU constraints */
8558 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8561 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8562 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8569 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8570 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8580 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8581 (skip_data_for_this_net == 0)) ||
8583 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8584 if (no_data_chunks) {
8585 /* let only control go out */
8589 if (net->flight_size >= net->cwnd) {
8590 /* skip this net, no room for data */
8594 if ((chk->whoTo != NULL) &&
8595 (chk->whoTo != net)) {
8596 /* Don't send the chunk on this net */
8599 if (asoc->sctp_cmt_on_off == 0) {
8600 if ((asoc->alternate) &&
8601 (asoc->alternate != net) &&
8602 (chk->whoTo == NULL)) {
8604 } else if ((net != asoc->primary_destination) &&
8605 (asoc->alternate == NULL) &&
8606 (chk->whoTo == NULL)) {
8610 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8612 * strange, we have a chunk that is
8613 * to big for its destination and
8614 * yet no fragment ok flag.
8615 * Something went wrong when the
8616 * PMTU changed...we did not mark
8617 * this chunk for some reason?? I
8618 * will fix it here by letting IP
8619 * fragment it for now and printing
8620 * a warning. This really should not
8623 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8624 chk->send_size, mtu);
8625 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8627 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8628 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8629 struct sctp_data_chunk *dchkh;
8631 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8632 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8634 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8635 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8636 /* ok we will add this one */
8639 * Add an AUTH chunk, if chunk
8640 * requires it, save the offset into
8641 * the chain for AUTH
8643 if (data_auth_reqd) {
8645 outchain = sctp_add_auth_chunk(outchain,
8651 auth_keyid = chk->auth_keyid;
8653 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8654 } else if (override_ok) {
8659 auth_keyid = chk->auth_keyid;
8661 } else if (auth_keyid != chk->auth_keyid) {
8669 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8670 chk->send_size, chk->copy_by_ref);
8671 if (outchain == NULL) {
8672 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8673 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8674 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8677 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8680 /* upate our MTU size */
8681 /* Do clear IP_DF ? */
8682 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8685 /* unsigned subtraction of mtu */
8686 if (mtu > chk->send_size)
8687 mtu -= chk->send_size;
8690 /* unsigned subtraction of r_mtu */
8691 if (r_mtu > chk->send_size)
8692 r_mtu -= chk->send_size;
8696 to_out += chk->send_size;
8697 if ((to_out > mx_mtu) && no_fragmentflg) {
8699 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8701 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8705 chk->window_probe = 0;
8706 data_list[bundle_at++] = chk;
8707 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8710 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8711 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8712 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8714 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8716 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8717 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8727 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8729 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8730 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8731 data_list[0]->window_probe = 1;
8732 net->window_probe = 1;
8738 * Must be sent in order of the
8739 * TSN's (on a network)
8743 } /* for (chunk gather loop for this net) */
8744 } /* if asoc.state OPEN */
8746 /* Is there something to send for this destination? */
8748 /* We may need to start a control timer or two */
8750 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8753 * do NOT clear the asconf flag as it is
8754 * used to do appropriate source address
8759 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8762 /* must start a send timer if data is being sent */
8763 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8765 * no timer running on this destination
8768 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8770 /* Now send it, if there is anything to send :> */
8771 if ((error = sctp_lowlevel_chunk_output(inp,
8774 (struct sockaddr *)&net->ro._l_addr,
8782 inp->sctp_lport, stcb->rport,
8783 htonl(stcb->asoc.peer_vtag),
8787 /* error, we could not output */
8788 if (error == ENOBUFS) {
8789 SCTP_STAT_INCR(sctps_lowlevelerr);
8790 asoc->ifp_had_enobuf = 1;
8792 if (from_where == 0) {
8793 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8795 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8797 if (*now_filled == 0) {
8798 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8800 *now = net->last_sent_time;
8802 net->last_sent_time = *now;
8806 if (error == EHOSTUNREACH) {
8808 * Destination went unreachable
8811 sctp_move_chunks_from_net(stcb, net);
8815 * I add this line to be paranoid. As far as
8816 * I can tell the continue, takes us back to
8817 * the top of the for, but just to make sure
8818 * I will reset these again here.
8820 ctl_cnt = bundle_at = 0;
8821 continue; /* This takes us back to the
8822 * for() for the nets. */
8824 asoc->ifp_had_enobuf = 0;
8829 if (bundle_at || hbflag) {
8830 /* For data/asconf and hb set time */
8831 if (*now_filled == 0) {
8832 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8834 *now = net->last_sent_time;
8836 net->last_sent_time = *now;
8840 *num_out += (ctl_cnt + bundle_at);
8843 /* setup for a RTO measurement */
8844 tsns_sent = data_list[0]->rec.data.TSN_seq;
8845 /* fill time if not already filled */
8846 if (*now_filled == 0) {
8847 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8849 *now = asoc->time_last_sent;
8851 asoc->time_last_sent = *now;
8853 if (net->rto_needed) {
8854 data_list[0]->do_rtt = 1;
8855 net->rto_needed = 0;
8857 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8858 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8864 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8865 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8868 if (old_start_at == NULL) {
8869 old_start_at = start_at;
8870 start_at = TAILQ_FIRST(&asoc->nets);
8872 goto again_one_more_time;
8875 * At the end there should be no NON timed chunks hanging on this
8878 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8879 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8881 if ((*num_out == 0) && (*reason_code == 0)) {
8886 sctp_clean_up_ctl(stcb, asoc, so_locked);
8891 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8894 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8895 * the control chunk queue.
8897 struct sctp_chunkhdr *hdr;
8898 struct sctp_tmit_chunk *chk;
8901 SCTP_TCB_LOCK_ASSERT(stcb);
8902 sctp_alloc_a_chunk(stcb, chk);
8905 sctp_m_freem(op_err);
8908 chk->copy_by_ref = 0;
8909 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8910 if (op_err == NULL) {
8911 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8915 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8916 chk->send_size += SCTP_BUF_LEN(mat);
8918 chk->sent = SCTP_DATAGRAM_UNSENT;
8920 chk->asoc = &stcb->asoc;
8923 hdr = mtod(op_err, struct sctp_chunkhdr *);
8924 hdr->chunk_type = SCTP_OPERATION_ERROR;
8925 hdr->chunk_flags = 0;
8926 hdr->chunk_length = htons(chk->send_size);
8927 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8930 chk->asoc->ctrl_queue_cnt++;
8934 sctp_send_cookie_echo(struct mbuf *m,
8936 struct sctp_tcb *stcb,
8937 struct sctp_nets *net)
8940 * pull out the cookie and put it at the front of the control chunk
8944 struct mbuf *cookie;
8945 struct sctp_paramhdr parm, *phdr;
8946 struct sctp_chunkhdr *hdr;
8947 struct sctp_tmit_chunk *chk;
8948 uint16_t ptype, plen;
8950 /* First find the cookie in the param area */
8952 at = offset + sizeof(struct sctp_init_chunk);
8954 SCTP_TCB_LOCK_ASSERT(stcb);
8956 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8960 ptype = ntohs(phdr->param_type);
8961 plen = ntohs(phdr->param_length);
8962 if (ptype == SCTP_STATE_COOKIE) {
8965 /* found the cookie */
8966 if ((pad = (plen % 4))) {
8969 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8970 if (cookie == NULL) {
8974 #ifdef SCTP_MBUF_LOGGING
8975 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8978 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8979 if (SCTP_BUF_IS_EXTENDED(mat)) {
8980 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8987 at += SCTP_SIZE32(plen);
8989 if (cookie == NULL) {
8990 /* Did not find the cookie */
8993 /* ok, we got the cookie lets change it into a cookie echo chunk */
8995 /* first the change from param to cookie */
8996 hdr = mtod(cookie, struct sctp_chunkhdr *);
8997 hdr->chunk_type = SCTP_COOKIE_ECHO;
8998 hdr->chunk_flags = 0;
8999 /* get the chunk stuff now and place it in the FRONT of the queue */
9000 sctp_alloc_a_chunk(stcb, chk);
9003 sctp_m_freem(cookie);
9006 chk->copy_by_ref = 0;
9007 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9008 chk->rec.chunk_id.can_take_data = 0;
9009 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9010 chk->send_size = plen;
9011 chk->sent = SCTP_DATAGRAM_UNSENT;
9013 chk->asoc = &stcb->asoc;
9016 atomic_add_int(&chk->whoTo->ref_count, 1);
9017 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9018 chk->asoc->ctrl_queue_cnt++;
9023 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9027 struct sctp_nets *net)
9030 * take a HB request and make it into a HB ack and send it.
9032 struct mbuf *outchain;
9033 struct sctp_chunkhdr *chdr;
9034 struct sctp_tmit_chunk *chk;
9038 /* must have a net pointer */
9041 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9042 if (outchain == NULL) {
9043 /* gak out of memory */
9046 #ifdef SCTP_MBUF_LOGGING
9047 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9050 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
9051 if (SCTP_BUF_IS_EXTENDED(mat)) {
9052 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9057 chdr = mtod(outchain, struct sctp_chunkhdr *);
9058 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9059 chdr->chunk_flags = 0;
9060 if (chk_length % 4) {
9062 uint32_t cpthis = 0;
9065 padlen = 4 - (chk_length % 4);
9066 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9068 sctp_alloc_a_chunk(stcb, chk);
9071 sctp_m_freem(outchain);
9074 chk->copy_by_ref = 0;
9075 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9076 chk->rec.chunk_id.can_take_data = 1;
9078 chk->send_size = chk_length;
9079 chk->sent = SCTP_DATAGRAM_UNSENT;
9081 chk->asoc = &stcb->asoc;
9082 chk->data = outchain;
9084 atomic_add_int(&chk->whoTo->ref_count, 1);
9085 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9086 chk->asoc->ctrl_queue_cnt++;
9090 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9092 /* formulate and queue a cookie-ack back to sender */
9093 struct mbuf *cookie_ack;
9094 struct sctp_chunkhdr *hdr;
9095 struct sctp_tmit_chunk *chk;
9097 SCTP_TCB_LOCK_ASSERT(stcb);
9099 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9100 if (cookie_ack == NULL) {
9104 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9105 sctp_alloc_a_chunk(stcb, chk);
9108 sctp_m_freem(cookie_ack);
9111 chk->copy_by_ref = 0;
9112 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9113 chk->rec.chunk_id.can_take_data = 1;
9115 chk->send_size = sizeof(struct sctp_chunkhdr);
9116 chk->sent = SCTP_DATAGRAM_UNSENT;
9118 chk->asoc = &stcb->asoc;
9119 chk->data = cookie_ack;
9120 if (chk->asoc->last_control_chunk_from != NULL) {
9121 chk->whoTo = chk->asoc->last_control_chunk_from;
9122 atomic_add_int(&chk->whoTo->ref_count, 1);
9126 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9127 hdr->chunk_type = SCTP_COOKIE_ACK;
9128 hdr->chunk_flags = 0;
9129 hdr->chunk_length = htons(chk->send_size);
9130 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9131 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9132 chk->asoc->ctrl_queue_cnt++;
9138 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9140 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9141 struct mbuf *m_shutdown_ack;
9142 struct sctp_shutdown_ack_chunk *ack_cp;
9143 struct sctp_tmit_chunk *chk;
9145 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9146 if (m_shutdown_ack == NULL) {
9150 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9151 sctp_alloc_a_chunk(stcb, chk);
9154 sctp_m_freem(m_shutdown_ack);
9157 chk->copy_by_ref = 0;
9158 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9159 chk->rec.chunk_id.can_take_data = 1;
9161 chk->send_size = sizeof(struct sctp_chunkhdr);
9162 chk->sent = SCTP_DATAGRAM_UNSENT;
9165 chk->asoc = &stcb->asoc;
9166 chk->data = m_shutdown_ack;
9169 atomic_add_int(&chk->whoTo->ref_count, 1);
9171 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9172 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9173 ack_cp->ch.chunk_flags = 0;
9174 ack_cp->ch.chunk_length = htons(chk->send_size);
9175 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9176 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9177 chk->asoc->ctrl_queue_cnt++;
9182 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9184 /* formulate and queue a SHUTDOWN to the sender */
9185 struct mbuf *m_shutdown;
9186 struct sctp_shutdown_chunk *shutdown_cp;
9187 struct sctp_tmit_chunk *chk;
9189 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9190 if (m_shutdown == NULL) {
9194 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9195 sctp_alloc_a_chunk(stcb, chk);
9198 sctp_m_freem(m_shutdown);
9201 chk->copy_by_ref = 0;
9202 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9203 chk->rec.chunk_id.can_take_data = 1;
9205 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9206 chk->sent = SCTP_DATAGRAM_UNSENT;
9209 chk->asoc = &stcb->asoc;
9210 chk->data = m_shutdown;
9213 atomic_add_int(&chk->whoTo->ref_count, 1);
9215 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9216 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9217 shutdown_cp->ch.chunk_flags = 0;
9218 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9219 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9220 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9221 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9222 chk->asoc->ctrl_queue_cnt++;
9227 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9230 * formulate and queue an ASCONF to the peer. ASCONF parameters
9231 * should be queued on the assoc queue.
9233 struct sctp_tmit_chunk *chk;
9234 struct mbuf *m_asconf;
9237 SCTP_TCB_LOCK_ASSERT(stcb);
9239 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9240 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9241 /* can't send a new one if there is one in flight already */
9244 /* compose an ASCONF chunk, maximum length is PMTU */
9245 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9246 if (m_asconf == NULL) {
9249 sctp_alloc_a_chunk(stcb, chk);
9252 sctp_m_freem(m_asconf);
9255 chk->copy_by_ref = 0;
9256 chk->rec.chunk_id.id = SCTP_ASCONF;
9257 chk->rec.chunk_id.can_take_data = 0;
9258 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9259 chk->data = m_asconf;
9260 chk->send_size = len;
9261 chk->sent = SCTP_DATAGRAM_UNSENT;
9263 chk->asoc = &stcb->asoc;
9266 atomic_add_int(&chk->whoTo->ref_count, 1);
9268 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9269 chk->asoc->ctrl_queue_cnt++;
9274 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9277 * formulate and queue a asconf-ack back to sender. the asconf-ack
9278 * must be stored in the tcb.
9280 struct sctp_tmit_chunk *chk;
9281 struct sctp_asconf_ack *ack, *latest_ack;
9283 struct sctp_nets *net = NULL;
9285 SCTP_TCB_LOCK_ASSERT(stcb);
9286 /* Get the latest ASCONF-ACK */
9287 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9288 if (latest_ack == NULL) {
9291 if (latest_ack->last_sent_to != NULL &&
9292 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9293 /* we're doing a retransmission */
9294 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9297 if (stcb->asoc.last_control_chunk_from == NULL) {
9298 if (stcb->asoc.alternate) {
9299 net = stcb->asoc.alternate;
9301 net = stcb->asoc.primary_destination;
9304 net = stcb->asoc.last_control_chunk_from;
9309 if (stcb->asoc.last_control_chunk_from == NULL) {
9310 if (stcb->asoc.alternate) {
9311 net = stcb->asoc.alternate;
9313 net = stcb->asoc.primary_destination;
9316 net = stcb->asoc.last_control_chunk_from;
9319 latest_ack->last_sent_to = net;
9321 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9322 if (ack->data == NULL) {
9325 /* copy the asconf_ack */
9326 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9327 if (m_ack == NULL) {
9328 /* couldn't copy it */
9331 #ifdef SCTP_MBUF_LOGGING
9332 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9335 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9336 if (SCTP_BUF_IS_EXTENDED(mat)) {
9337 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9343 sctp_alloc_a_chunk(stcb, chk);
9347 sctp_m_freem(m_ack);
9350 chk->copy_by_ref = 0;
9351 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9352 chk->rec.chunk_id.can_take_data = 1;
9353 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9356 atomic_add_int(&chk->whoTo->ref_count, 1);
9361 chk->send_size = ack->len;
9362 chk->sent = SCTP_DATAGRAM_UNSENT;
9364 chk->asoc = &stcb->asoc;
9366 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9367 chk->asoc->ctrl_queue_cnt++;
9374 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9375 struct sctp_tcb *stcb,
9376 struct sctp_association *asoc,
9377 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9378 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9384 * send out one MTU of retransmission. If fast_retransmit is
9385 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9386 * rwnd. For a Cookie or Asconf in the control chunk queue we
9387 * retransmit them by themselves.
9389 * For data chunks we will pick out the lowest TSN's in the sent_queue
9390 * marked for resend and bundle them all together (up to a MTU of
9391 * destination). The address to send to should have been
9392 * selected/changed where the retransmission was marked (i.e. in FR
9393 * or t3-timeout routines).
9395 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9396 struct sctp_tmit_chunk *chk, *fwd;
9397 struct mbuf *m, *endofchain;
9398 struct sctp_nets *net = NULL;
9399 uint32_t tsns_sent = 0;
9400 int no_fragmentflg, bundle_at, cnt_thru;
9402 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9403 struct sctp_auth_chunk *auth = NULL;
9404 uint32_t auth_offset = 0;
9405 uint16_t auth_keyid;
9406 int override_ok = 1;
9407 int data_auth_reqd = 0;
9410 SCTP_TCB_LOCK_ASSERT(stcb);
9411 tmr_started = ctl_cnt = bundle_at = error = 0;
9416 endofchain = m = NULL;
9417 auth_keyid = stcb->asoc.authinfo.active_keyid;
9418 #ifdef SCTP_AUDITING_ENABLED
9419 sctp_audit_log(0xC3, 1);
9421 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9422 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9423 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9424 asoc->sent_queue_retran_cnt);
9425 asoc->sent_queue_cnt = 0;
9426 asoc->sent_queue_cnt_removeable = 0;
9427 /* send back 0/0 so we enter normal transmission */
9431 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9432 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9433 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9434 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9435 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9438 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9439 if (chk != asoc->str_reset) {
9441 * not eligible for retran if its
9448 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9452 * Add an AUTH chunk, if chunk requires it save the
9453 * offset into the chain for AUTH
9455 if ((auth == NULL) &&
9456 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9457 stcb->asoc.peer_auth_chunks))) {
9458 m = sctp_add_auth_chunk(m, &endofchain,
9459 &auth, &auth_offset,
9461 chk->rec.chunk_id.id);
9462 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9464 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9470 /* do we have control chunks to retransmit? */
9472 /* Start a timer no matter if we suceed or fail */
9473 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9474 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9475 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9476 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9477 chk->snd_count++; /* update our count */
9478 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9479 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9480 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9481 no_fragmentflg, 0, 0,
9482 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9483 chk->whoTo->port, NULL,
9486 SCTP_STAT_INCR(sctps_lowlevelerr);
9493 * We don't want to mark the net->sent time here since this
9494 * we use this for HB and retrans cannot measure RTT
9496 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9498 chk->sent = SCTP_DATAGRAM_SENT;
9499 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9503 /* Clean up the fwd-tsn list */
9504 sctp_clean_up_ctl(stcb, asoc, so_locked);
9509 * Ok, it is just data retransmission we need to do or that and a
9510 * fwd-tsn with it all.
9512 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9513 return (SCTP_RETRAN_DONE);
9515 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9516 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9517 /* not yet open, resend the cookie and that is it */
9520 #ifdef SCTP_AUDITING_ENABLED
9521 sctp_auditing(20, inp, stcb, NULL);
9523 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9524 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9525 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9526 /* No, not sent to this net or not ready for rtx */
9529 if (chk->data == NULL) {
9530 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9531 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9534 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9535 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9536 /* Gak, we have exceeded max unlucky retran, abort! */
9537 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9539 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9540 atomic_add_int(&stcb->asoc.refcnt, 1);
9541 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9542 SCTP_TCB_LOCK(stcb);
9543 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9544 return (SCTP_RETRAN_EXIT);
9546 /* pick up the net */
9548 switch (net->ro._l_addr.sa.sa_family) {
9551 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9556 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9565 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9566 /* No room in peers rwnd */
9569 tsn = asoc->last_acked_seq + 1;
9570 if (tsn == chk->rec.data.TSN_seq) {
9572 * we make a special exception for this
9573 * case. The peer has no rwnd but is missing
9574 * the lowest chunk.. which is probably what
9575 * is holding up the rwnd.
9577 goto one_chunk_around;
9582 if (asoc->peers_rwnd < mtu) {
9584 if ((asoc->peers_rwnd == 0) &&
9585 (asoc->total_flight == 0)) {
9586 chk->window_probe = 1;
9587 chk->whoTo->window_probe = 1;
9590 #ifdef SCTP_AUDITING_ENABLED
9591 sctp_audit_log(0xC3, 2);
9595 net->fast_retran_ip = 0;
9596 if (chk->rec.data.doing_fast_retransmit == 0) {
9598 * if no FR in progress skip destination that have
9599 * flight_size > cwnd.
9601 if (net->flight_size >= net->cwnd) {
9606 * Mark the destination net to have FR recovery
9610 net->fast_retran_ip = 1;
9614 * if no AUTH is yet included and this chunk requires it,
9615 * make sure to account for it. We don't apply the size
9616 * until the AUTH chunk is actually added below in case
9617 * there is no room for this chunk.
9619 if (data_auth_reqd && (auth == NULL)) {
9620 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9624 if ((chk->send_size <= (mtu - dmtu)) ||
9625 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9626 /* ok we will add this one */
9627 if (data_auth_reqd) {
9629 m = sctp_add_auth_chunk(m,
9635 auth_keyid = chk->auth_keyid;
9637 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9638 } else if (override_ok) {
9639 auth_keyid = chk->auth_keyid;
9641 } else if (chk->auth_keyid != auth_keyid) {
9642 /* different keyid, so done bundling */
9646 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9648 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9651 /* Do clear IP_DF ? */
9652 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9655 /* upate our MTU size */
9656 if (mtu > (chk->send_size + dmtu))
9657 mtu -= (chk->send_size + dmtu);
9660 data_list[bundle_at++] = chk;
9661 if (one_chunk && (asoc->total_flight <= 0)) {
9662 SCTP_STAT_INCR(sctps_windowprobed);
9665 if (one_chunk == 0) {
9667 * now are there anymore forward from chk to pick
9670 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9671 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9672 /* Nope, not for retran */
9675 if (fwd->whoTo != net) {
9676 /* Nope, not the net in question */
9679 if (data_auth_reqd && (auth == NULL)) {
9680 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9683 if (fwd->send_size <= (mtu - dmtu)) {
9684 if (data_auth_reqd) {
9686 m = sctp_add_auth_chunk(m,
9692 auth_keyid = fwd->auth_keyid;
9694 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9695 } else if (override_ok) {
9696 auth_keyid = fwd->auth_keyid;
9698 } else if (fwd->auth_keyid != auth_keyid) {
9706 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9708 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9711 /* Do clear IP_DF ? */
9712 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9715 /* upate our MTU size */
9716 if (mtu > (fwd->send_size + dmtu))
9717 mtu -= (fwd->send_size + dmtu);
9720 data_list[bundle_at++] = fwd;
9721 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9725 /* can't fit so we are done */
9730 /* Is there something to send for this destination? */
9733 * No matter if we fail/or suceed we should start a
9734 * timer. A failure is like a lost IP packet :-)
9736 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9738 * no timer running on this destination
9741 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9744 /* Now lets send it, if there is anything to send :> */
9745 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9746 (struct sockaddr *)&net->ro._l_addr, m,
9747 auth_offset, auth, auth_keyid,
9748 no_fragmentflg, 0, 0,
9749 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9753 /* error, we could not output */
9754 SCTP_STAT_INCR(sctps_lowlevelerr);
9762 * We don't want to mark the net->sent time here
9763 * since this we use this for HB and retrans cannot
9766 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9768 /* For auto-close */
9770 if (*now_filled == 0) {
9771 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9772 *now = asoc->time_last_sent;
9775 asoc->time_last_sent = *now;
9777 *cnt_out += bundle_at;
9778 #ifdef SCTP_AUDITING_ENABLED
9779 sctp_audit_log(0xC4, bundle_at);
9782 tsns_sent = data_list[0]->rec.data.TSN_seq;
9784 for (i = 0; i < bundle_at; i++) {
9785 SCTP_STAT_INCR(sctps_sendretransdata);
9786 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9788 * When we have a revoked data, and we
9789 * retransmit it, then we clear the revoked
9790 * flag since this flag dictates if we
9791 * subtracted from the fs
9793 if (data_list[i]->rec.data.chunk_was_revoked) {
9794 /* Deflate the cwnd */
9795 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9796 data_list[i]->rec.data.chunk_was_revoked = 0;
9798 data_list[i]->snd_count++;
9799 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9800 /* record the time */
9801 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9802 if (data_list[i]->book_size_scale) {
9804 * need to double the book size on
9807 data_list[i]->book_size_scale = 0;
9809 * Since we double the booksize, we
9810 * must also double the output queue
9811 * size, since this get shrunk when
9812 * we free by this amount.
9814 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9815 data_list[i]->book_size *= 2;
9819 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9820 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9821 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9823 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9824 (uint32_t) (data_list[i]->send_size +
9825 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9827 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9828 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9829 data_list[i]->whoTo->flight_size,
9830 data_list[i]->book_size,
9831 (uintptr_t) data_list[i]->whoTo,
9832 data_list[i]->rec.data.TSN_seq);
9834 sctp_flight_size_increase(data_list[i]);
9835 sctp_total_flight_increase(stcb, data_list[i]);
9836 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9837 /* SWS sender side engages */
9838 asoc->peers_rwnd = 0;
9841 (data_list[i]->rec.data.doing_fast_retransmit)) {
9842 SCTP_STAT_INCR(sctps_sendfastretrans);
9843 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9844 (tmr_started == 0)) {
9846 * ok we just fast-retrans'd
9847 * the lowest TSN, i.e the
9848 * first on the list. In
9849 * this case we want to give
9850 * some more time to get a
9851 * SACK back without a
9854 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9855 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9856 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9860 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9861 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9863 #ifdef SCTP_AUDITING_ENABLED
9864 sctp_auditing(21, inp, stcb, NULL);
9870 if (asoc->sent_queue_retran_cnt <= 0) {
9871 /* all done we have no more to retran */
9872 asoc->sent_queue_retran_cnt = 0;
9876 /* No more room in rwnd */
9879 /* stop the for loop here. we sent out a packet */
9886 sctp_timer_validation(struct sctp_inpcb *inp,
9887 struct sctp_tcb *stcb,
9888 struct sctp_association *asoc)
9890 struct sctp_nets *net;
9892 /* Validate that a timer is running somewhere */
9893 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9894 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9895 /* Here is a timer */
9899 SCTP_TCB_LOCK_ASSERT(stcb);
9900 /* Gak, we did not have a timer somewhere */
9901 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9902 if (asoc->alternate) {
9903 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9905 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9911 sctp_chunk_output(struct sctp_inpcb *inp,
9912 struct sctp_tcb *stcb,
9915 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9921 * Ok this is the generic chunk service queue. we must do the
9923 * - See if there are retransmits pending, if so we must
9925 * - Service the stream queue that is next, moving any
9926 * message (note I must get a complete message i.e.
9927 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9929 * - Check to see if the cwnd/rwnd allows any output, if so we
9930 * go ahead and fomulate and send the low level chunks. Making sure
9931 * to combine any control in the control chunk queue also.
9933 struct sctp_association *asoc;
9934 struct sctp_nets *net;
9935 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9936 unsigned int burst_cnt = 0;
9940 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9943 unsigned int tot_frs = 0;
9946 /* The Nagle algorithm is only applied when handling a send call. */
9947 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9948 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9956 SCTP_TCB_LOCK_ASSERT(stcb);
9958 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9960 if ((un_sent <= 0) &&
9961 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9962 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9963 (asoc->sent_queue_retran_cnt == 0)) {
9964 /* Nothing to do unless there is something to be sent left */
9968 * Do we have something to send, data or control AND a sack timer
9969 * running, if so piggy-back the sack.
9971 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9972 sctp_send_sack(stcb, so_locked);
9973 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9975 while (asoc->sent_queue_retran_cnt) {
9977 * Ok, it is retransmission time only, we send out only ONE
9978 * packet with a single call off to the retran code.
9980 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9982 * Special hook for handling cookiess discarded
9983 * by peer that carried data. Send cookie-ack only
9984 * and then the next call with get the retran's.
9986 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9988 &now, &now_filled, frag_point, so_locked);
9990 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9991 /* if its not from a HB then do it */
9993 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9999 * its from any other place, we don't allow retran
10000 * output (only control)
10005 /* Can't send anymore */
10007 * now lets push out control by calling med-level
10008 * output once. this assures that we WILL send HB's
10011 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10013 &now, &now_filled, frag_point, so_locked);
10014 #ifdef SCTP_AUDITING_ENABLED
10015 sctp_auditing(8, inp, stcb, NULL);
10017 sctp_timer_validation(inp, stcb, asoc);
10022 * The count was off.. retran is not happening so do
10023 * the normal retransmission.
10025 #ifdef SCTP_AUDITING_ENABLED
10026 sctp_auditing(9, inp, stcb, NULL);
10028 if (ret == SCTP_RETRAN_EXIT) {
10033 if (from_where == SCTP_OUTPUT_FROM_T3) {
10034 /* Only one transmission allowed out of a timeout */
10035 #ifdef SCTP_AUDITING_ENABLED
10036 sctp_auditing(10, inp, stcb, NULL);
10038 /* Push out any control */
10039 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10040 &now, &now_filled, frag_point, so_locked);
10043 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10044 /* Hit FR burst limit */
10047 if ((num_out == 0) && (ret == 0)) {
10048 /* No more retrans to send */
10052 #ifdef SCTP_AUDITING_ENABLED
10053 sctp_auditing(12, inp, stcb, NULL);
10055 /* Check for bad destinations, if they exist move chunks around. */
10056 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10057 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10059 * if possible move things off of this address we
10060 * still may send below due to the dormant state but
10061 * we try to find an alternate address to send to
10062 * and if we have one we move all queued data on the
10063 * out wheel to this alternate address.
10065 if (net->ref_count > 1)
10066 sctp_move_chunks_from_net(stcb, net);
10069 * if ((asoc->sat_network) || (net->addr_is_local))
10070 * { burst_limit = asoc->max_burst *
10071 * SCTP_SAT_NETWORK_BURST_INCR; }
10073 if (asoc->max_burst > 0) {
10074 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10075 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10077 * JRS - Use the congestion
10078 * control given in the
10079 * congestion control module
10081 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10082 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10083 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10085 SCTP_STAT_INCR(sctps_maxburstqueued);
10087 net->fast_retran_ip = 0;
10089 if (net->flight_size == 0) {
10091 * Should be decaying the
10103 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10104 &reason_code, 0, from_where,
10105 &now, &now_filled, frag_point, so_locked);
10107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10108 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10109 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10111 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10112 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10113 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10117 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10119 tot_out += num_out;
10121 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10122 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10123 if (num_out == 0) {
10124 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10129 * When the Nagle algorithm is used, look at how
10130 * much is unsent, then if its smaller than an MTU
10131 * and we have data in flight we stop, except if we
10132 * are handling a fragmented user message.
10134 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10135 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10136 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10137 (stcb->asoc.total_flight > 0) &&
10138 ((stcb->asoc.locked_on_sending == NULL) ||
10139 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10143 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10144 TAILQ_EMPTY(&asoc->send_queue) &&
10145 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10146 /* Nothing left to send */
10149 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10150 /* Nothing left to send */
10153 } while (num_out &&
10154 ((asoc->max_burst == 0) ||
10155 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10156 (burst_cnt < asoc->max_burst)));
10158 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10159 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10160 SCTP_STAT_INCR(sctps_maxburstqueued);
10161 asoc->burst_limit_applied = 1;
10162 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10163 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10166 asoc->burst_limit_applied = 0;
10169 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10170 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10176 * Now we need to clean up the control chunk chain if a ECNE is on
10177 * it. It must be marked as UNSENT again so next call will continue
10178 * to send it until such time that we get a CWR, to remove it.
10180 if (stcb->asoc.ecn_echo_cnt_onq)
10181 sctp_fix_ecn_echo(asoc);
10188 struct sctp_inpcb *inp,
10190 struct sockaddr *addr,
10191 struct mbuf *control,
10196 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10199 if (inp->sctp_socket == NULL) {
10200 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10203 return (sctp_sosend(inp->sctp_socket,
10205 (struct uio *)NULL,
10213 send_forward_tsn(struct sctp_tcb *stcb,
10214 struct sctp_association *asoc)
10216 struct sctp_tmit_chunk *chk;
10217 struct sctp_forward_tsn_chunk *fwdtsn;
10218 uint32_t advance_peer_ack_point;
10220 SCTP_TCB_LOCK_ASSERT(stcb);
10221 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10222 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10223 /* mark it to unsent */
10224 chk->sent = SCTP_DATAGRAM_UNSENT;
10225 chk->snd_count = 0;
10226 /* Do we correct its output location? */
10228 sctp_free_remote_addr(chk->whoTo);
10231 goto sctp_fill_in_rest;
10234 /* Ok if we reach here we must build one */
10235 sctp_alloc_a_chunk(stcb, chk);
10239 asoc->fwd_tsn_cnt++;
10240 chk->copy_by_ref = 0;
10241 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10242 chk->rec.chunk_id.can_take_data = 0;
10246 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10247 if (chk->data == NULL) {
10248 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10251 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10252 chk->sent = SCTP_DATAGRAM_UNSENT;
10253 chk->snd_count = 0;
10254 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10255 asoc->ctrl_queue_cnt++;
10258 * Here we go through and fill out the part that deals with
10259 * stream/seq of the ones we skip.
10261 SCTP_BUF_LEN(chk->data) = 0;
10263 struct sctp_tmit_chunk *at, *tp1, *last;
10264 struct sctp_strseq *strseq;
10265 unsigned int cnt_of_space, i, ovh;
10266 unsigned int space_needed;
10267 unsigned int cnt_of_skipped = 0;
10269 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10270 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10271 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10272 /* no more to look at */
10275 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10276 /* We don't report these */
10281 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10282 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10284 cnt_of_space = M_TRAILINGSPACE(chk->data);
10286 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10287 ovh = SCTP_MIN_OVERHEAD;
10289 ovh = SCTP_MIN_V4_OVERHEAD;
10291 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10292 /* trim to a mtu size */
10293 cnt_of_space = asoc->smallest_mtu - ovh;
10295 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10296 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10297 0xff, 0, cnt_of_skipped,
10298 asoc->advanced_peer_ack_point);
10301 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10302 if (cnt_of_space < space_needed) {
10304 * ok we must trim down the chunk by lowering the
10305 * advance peer ack point.
10307 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10308 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10309 0xff, 0xff, cnt_of_space,
10312 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10313 cnt_of_skipped /= sizeof(struct sctp_strseq);
10315 * Go through and find the TSN that will be the one
10318 at = TAILQ_FIRST(&asoc->sent_queue);
10320 for (i = 0; i < cnt_of_skipped; i++) {
10321 tp1 = TAILQ_NEXT(at, sctp_next);
10328 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10329 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10330 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10331 asoc->advanced_peer_ack_point);
10335 * last now points to last one I can report, update
10339 advance_peer_ack_point = last->rec.data.TSN_seq;
10340 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10341 cnt_of_skipped * sizeof(struct sctp_strseq);
10343 chk->send_size = space_needed;
10344 /* Setup the chunk */
10345 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10346 fwdtsn->ch.chunk_length = htons(chk->send_size);
10347 fwdtsn->ch.chunk_flags = 0;
10348 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10349 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10350 SCTP_BUF_LEN(chk->data) = chk->send_size;
10353 * Move pointer to after the fwdtsn and transfer to the
10356 strseq = (struct sctp_strseq *)fwdtsn;
10358 * Now populate the strseq list. This is done blindly
10359 * without pulling out duplicate stream info. This is
10360 * inefficent but won't harm the process since the peer will
10361 * look at these in sequence and will thus release anything.
10362 * It could mean we exceed the PMTU and chop off some that
10363 * we could have included.. but this is unlikely (aka 1432/4
10364 * would mean 300+ stream seq's would have to be reported in
10365 * one FWD-TSN. With a bit of work we can later FIX this to
10366 * optimize and pull out duplcates.. but it does add more
10367 * overhead. So for now... not!
10369 at = TAILQ_FIRST(&asoc->sent_queue);
10370 for (i = 0; i < cnt_of_skipped; i++) {
10371 tp1 = TAILQ_NEXT(at, sctp_next);
10374 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10375 /* We don't report these */
10380 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10381 at->rec.data.fwd_tsn_cnt = 0;
10383 strseq->stream = ntohs(at->rec.data.stream_number);
10384 strseq->sequence = ntohs(at->rec.data.stream_seq);
10393 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10394 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10400 * Queue up a SACK or NR-SACK in the control queue.
10401 * We must first check to see if a SACK or NR-SACK is
10402 * somehow on the control queue.
10403 * If so, we will take and and remove the old one.
10405 struct sctp_association *asoc;
10406 struct sctp_tmit_chunk *chk, *a_chk;
10407 struct sctp_sack_chunk *sack;
10408 struct sctp_nr_sack_chunk *nr_sack;
10409 struct sctp_gap_ack_block *gap_descriptor;
10410 struct sack_track *selector;
10415 int limit_reached = 0;
10416 unsigned int i, siz, j;
10417 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10420 uint32_t highest_tsn;
10425 if (stcb->asoc.nrsack_supported == 1) {
10426 type = SCTP_NR_SELECTIVE_ACK;
10428 type = SCTP_SELECTIVE_ACK;
10431 asoc = &stcb->asoc;
10432 SCTP_TCB_LOCK_ASSERT(stcb);
10433 if (asoc->last_data_chunk_from == NULL) {
10434 /* Hmm we never received anything */
10437 sctp_slide_mapping_arrays(stcb);
10438 sctp_set_rwnd(stcb, asoc);
10439 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10440 if (chk->rec.chunk_id.id == type) {
10441 /* Hmm, found a sack already on queue, remove it */
10442 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10443 asoc->ctrl_queue_cnt--;
10446 sctp_m_freem(a_chk->data);
10447 a_chk->data = NULL;
10449 if (a_chk->whoTo) {
10450 sctp_free_remote_addr(a_chk->whoTo);
10451 a_chk->whoTo = NULL;
10456 if (a_chk == NULL) {
10457 sctp_alloc_a_chunk(stcb, a_chk);
10458 if (a_chk == NULL) {
10459 /* No memory so we drop the idea, and set a timer */
10460 if (stcb->asoc.delayed_ack) {
10461 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10462 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10463 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10464 stcb->sctp_ep, stcb, NULL);
10466 stcb->asoc.send_sack = 1;
10470 a_chk->copy_by_ref = 0;
10471 a_chk->rec.chunk_id.id = type;
10472 a_chk->rec.chunk_id.can_take_data = 1;
10474 /* Clear our pkt counts */
10475 asoc->data_pkts_seen = 0;
10478 a_chk->asoc = asoc;
10479 a_chk->snd_count = 0;
10480 a_chk->send_size = 0; /* fill in later */
10481 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10482 a_chk->whoTo = NULL;
10484 if ((asoc->numduptsns) ||
10485 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10487 * Ok, we have some duplicates or the destination for the
10488 * sack is unreachable, lets see if we can select an
10489 * alternate than asoc->last_data_chunk_from
10491 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10492 (asoc->used_alt_onsack > asoc->numnets)) {
10493 /* We used an alt last time, don't this time */
10494 a_chk->whoTo = NULL;
10496 asoc->used_alt_onsack++;
10497 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10499 if (a_chk->whoTo == NULL) {
10500 /* Nope, no alternate */
10501 a_chk->whoTo = asoc->last_data_chunk_from;
10502 asoc->used_alt_onsack = 0;
10506 * No duplicates so we use the last place we received data
10509 asoc->used_alt_onsack = 0;
10510 a_chk->whoTo = asoc->last_data_chunk_from;
10512 if (a_chk->whoTo) {
10513 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10515 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10516 highest_tsn = asoc->highest_tsn_inside_map;
10518 highest_tsn = asoc->highest_tsn_inside_nr_map;
10520 if (highest_tsn == asoc->cumulative_tsn) {
10522 if (type == SCTP_SELECTIVE_ACK) {
10523 space_req = sizeof(struct sctp_sack_chunk);
10525 space_req = sizeof(struct sctp_nr_sack_chunk);
10528 /* gaps get a cluster */
10529 space_req = MCLBYTES;
10531 /* Ok now lets formulate a MBUF with our sack */
10532 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10533 if ((a_chk->data == NULL) ||
10534 (a_chk->whoTo == NULL)) {
10535 /* rats, no mbuf memory */
10537 /* was a problem with the destination */
10538 sctp_m_freem(a_chk->data);
10539 a_chk->data = NULL;
10541 sctp_free_a_chunk(stcb, a_chk, so_locked);
10542 /* sa_ignore NO_NULL_CHK */
10543 if (stcb->asoc.delayed_ack) {
10544 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10545 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10546 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10547 stcb->sctp_ep, stcb, NULL);
10549 stcb->asoc.send_sack = 1;
10553 /* ok, lets go through and fill it in */
10554 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10555 space = M_TRAILINGSPACE(a_chk->data);
10556 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10557 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10559 limit = mtod(a_chk->data, caddr_t);
10564 if ((asoc->sctp_cmt_on_off > 0) &&
10565 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10567 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10568 * received, then set high bit to 1, else 0. Reset
10571 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10572 asoc->cmt_dac_pkts_rcvd = 0;
10574 #ifdef SCTP_ASOCLOG_OF_TSNS
10575 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10576 stcb->asoc.cumack_log_atsnt++;
10577 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10578 stcb->asoc.cumack_log_atsnt = 0;
10581 /* reset the readers interpretation */
10582 stcb->freed_by_sorcv_sincelast = 0;
10584 if (type == SCTP_SELECTIVE_ACK) {
10585 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10587 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10588 if (highest_tsn > asoc->mapping_array_base_tsn) {
10589 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10591 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10595 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10596 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10597 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10598 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10600 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10604 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10607 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10609 if (((type == SCTP_SELECTIVE_ACK) &&
10610 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10611 ((type == SCTP_NR_SELECTIVE_ACK) &&
10612 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10613 /* we have a gap .. maybe */
10614 for (i = 0; i < siz; i++) {
10615 tsn_map = asoc->mapping_array[i];
10616 if (type == SCTP_SELECTIVE_ACK) {
10617 tsn_map |= asoc->nr_mapping_array[i];
10621 * Clear all bits corresponding to TSNs
10622 * smaller or equal to the cumulative TSN.
10624 tsn_map &= (~0 << (1 - offset));
10626 selector = &sack_array[tsn_map];
10627 if (mergeable && selector->right_edge) {
10629 * Backup, left and right edges were ok to
10635 if (selector->num_entries == 0)
10638 for (j = 0; j < selector->num_entries; j++) {
10639 if (mergeable && selector->right_edge) {
10641 * do a merge by NOT setting
10647 * no merge, set the left
10651 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10653 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10656 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10662 if (selector->left_edge) {
10666 if (limit_reached) {
10667 /* Reached the limit stop */
10673 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10674 (limit_reached == 0)) {
10678 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10679 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10681 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10684 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10687 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10689 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10690 /* we have a gap .. maybe */
10691 for (i = 0; i < siz; i++) {
10692 tsn_map = asoc->nr_mapping_array[i];
10695 * Clear all bits corresponding to
10696 * TSNs smaller or equal to the
10699 tsn_map &= (~0 << (1 - offset));
10701 selector = &sack_array[tsn_map];
10702 if (mergeable && selector->right_edge) {
10704 * Backup, left and right edges were
10707 num_nr_gap_blocks--;
10710 if (selector->num_entries == 0)
10713 for (j = 0; j < selector->num_entries; j++) {
10714 if (mergeable && selector->right_edge) {
10716 * do a merge by NOT
10723 * no merge, set the
10727 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10729 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10730 num_nr_gap_blocks++;
10732 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10738 if (selector->left_edge) {
10742 if (limit_reached) {
10743 /* Reached the limit stop */
10750 /* now we must add any dups we are going to report. */
10751 if ((limit_reached == 0) && (asoc->numduptsns)) {
10752 dup = (uint32_t *) gap_descriptor;
10753 for (i = 0; i < asoc->numduptsns; i++) {
10754 *dup = htonl(asoc->dup_tsns[i]);
10757 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10762 asoc->numduptsns = 0;
10765 * now that the chunk is prepared queue it to the control chunk
10768 if (type == SCTP_SELECTIVE_ACK) {
10769 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10770 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10771 num_dups * sizeof(int32_t);
10772 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10773 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10774 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10775 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10776 sack->sack.num_dup_tsns = htons(num_dups);
10777 sack->ch.chunk_type = type;
10778 sack->ch.chunk_flags = flags;
10779 sack->ch.chunk_length = htons(a_chk->send_size);
10781 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10782 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10783 num_dups * sizeof(int32_t);
10784 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10785 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10786 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10787 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10788 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10789 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10790 nr_sack->nr_sack.reserved = 0;
10791 nr_sack->ch.chunk_type = type;
10792 nr_sack->ch.chunk_flags = flags;
10793 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10795 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10796 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10797 asoc->ctrl_queue_cnt++;
10798 asoc->send_sack = 0;
10799 SCTP_STAT_INCR(sctps_sendsacks);
10804 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10805 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10810 struct mbuf *m_abort, *m, *m_last;
10811 struct mbuf *m_out, *m_end = NULL;
10812 struct sctp_abort_chunk *abort;
10813 struct sctp_auth_chunk *auth = NULL;
10814 struct sctp_nets *net;
10816 uint32_t auth_offset = 0;
10817 uint16_t cause_len, chunk_len, padding_len;
10819 SCTP_TCB_LOCK_ASSERT(stcb);
10821 * Add an AUTH chunk, if chunk requires it and save the offset into
10822 * the chain for AUTH
10824 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10825 stcb->asoc.peer_auth_chunks)) {
10826 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10827 stcb, SCTP_ABORT_ASSOCIATION);
10828 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10832 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10833 if (m_abort == NULL) {
10835 sctp_m_freem(m_out);
10838 sctp_m_freem(operr);
10842 /* link in any error */
10843 SCTP_BUF_NEXT(m_abort) = operr;
10846 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10847 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10848 if (SCTP_BUF_NEXT(m) == NULL) {
10852 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10853 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10854 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10855 if (m_out == NULL) {
10856 /* NO Auth chunk prepended, so reserve space in front */
10857 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10860 /* Put AUTH chunk at the front of the chain */
10861 SCTP_BUF_NEXT(m_end) = m_abort;
10863 if (stcb->asoc.alternate) {
10864 net = stcb->asoc.alternate;
10866 net = stcb->asoc.primary_destination;
10868 /* Fill in the ABORT chunk header. */
10869 abort = mtod(m_abort, struct sctp_abort_chunk *);
10870 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10871 if (stcb->asoc.peer_vtag == 0) {
10872 /* This happens iff the assoc is in COOKIE-WAIT state. */
10873 vtag = stcb->asoc.my_vtag;
10874 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10876 vtag = stcb->asoc.peer_vtag;
10877 abort->ch.chunk_flags = 0;
10879 abort->ch.chunk_length = htons(chunk_len);
10880 /* Add padding, if necessary. */
10881 if (padding_len > 0) {
10882 if ((m_last == NULL) ||
10883 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10884 sctp_m_freem(m_out);
10888 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10889 (struct sockaddr *)&net->ro._l_addr,
10890 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10891 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10892 stcb->asoc.primary_destination->port, NULL,
10895 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10899 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10900 struct sctp_nets *net,
10903 /* formulate and SEND a SHUTDOWN-COMPLETE */
10904 struct mbuf *m_shutdown_comp;
10905 struct sctp_shutdown_complete_chunk *shutdown_complete;
10909 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10910 if (m_shutdown_comp == NULL) {
10914 if (reflect_vtag) {
10915 flags = SCTP_HAD_NO_TCB;
10916 vtag = stcb->asoc.my_vtag;
10919 vtag = stcb->asoc.peer_vtag;
10921 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10922 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10923 shutdown_complete->ch.chunk_flags = flags;
10924 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10925 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10926 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10927 (struct sockaddr *)&net->ro._l_addr,
10928 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10929 stcb->sctp_ep->sctp_lport, stcb->rport,
10933 SCTP_SO_NOT_LOCKED);
10934 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10939 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10940 struct sctphdr *sh, uint32_t vtag,
10941 uint8_t type, struct mbuf *cause,
10942 uint8_t mflowtype, uint32_t mflowid,
10943 uint32_t vrf_id, uint16_t port)
10945 struct mbuf *o_pak;
10947 struct sctphdr *shout;
10948 struct sctp_chunkhdr *ch;
10950 #if defined(INET) || defined(INET6)
10951 struct udphdr *udp;
10955 int len, cause_len, padding_len;
10958 struct sockaddr_in *src_sin, *dst_sin;
10963 struct sockaddr_in6 *src_sin6, *dst_sin6;
10964 struct ip6_hdr *ip6;
10968 /* Compute the length of the cause and add final padding. */
10970 if (cause != NULL) {
10971 struct mbuf *m_at, *m_last = NULL;
10973 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10974 if (SCTP_BUF_NEXT(m_at) == NULL)
10976 cause_len += SCTP_BUF_LEN(m_at);
10978 padding_len = cause_len % 4;
10979 if (padding_len != 0) {
10980 padding_len = 4 - padding_len;
10982 if (padding_len != 0) {
10983 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10984 sctp_m_freem(cause);
10991 /* Get an mbuf for the header. */
10992 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10993 switch (dst->sa_family) {
10996 len += sizeof(struct ip);
11001 len += sizeof(struct ip6_hdr);
11007 #if defined(INET) || defined(INET6)
11009 len += sizeof(struct udphdr);
11012 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11013 if (mout == NULL) {
11015 sctp_m_freem(cause);
11019 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11020 SCTP_BUF_LEN(mout) = len;
11021 SCTP_BUF_NEXT(mout) = cause;
11022 mout->m_pkthdr.flowid = mflowid;
11023 M_HASHTYPE_SET(mout, mflowtype);
11030 switch (dst->sa_family) {
11033 src_sin = (struct sockaddr_in *)src;
11034 dst_sin = (struct sockaddr_in *)dst;
11035 ip = mtod(mout, struct ip *);
11036 ip->ip_v = IPVERSION;
11037 ip->ip_hl = (sizeof(struct ip) >> 2);
11039 ip->ip_id = ip_newid();
11041 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11043 ip->ip_p = IPPROTO_UDP;
11045 ip->ip_p = IPPROTO_SCTP;
11047 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11048 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11050 len = sizeof(struct ip);
11051 shout = (struct sctphdr *)((caddr_t)ip + len);
11056 src_sin6 = (struct sockaddr_in6 *)src;
11057 dst_sin6 = (struct sockaddr_in6 *)dst;
11058 ip6 = mtod(mout, struct ip6_hdr *);
11059 ip6->ip6_flow = htonl(0x60000000);
11060 if (V_ip6_auto_flowlabel) {
11061 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11063 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11065 ip6->ip6_nxt = IPPROTO_UDP;
11067 ip6->ip6_nxt = IPPROTO_SCTP;
11069 ip6->ip6_src = dst_sin6->sin6_addr;
11070 ip6->ip6_dst = src_sin6->sin6_addr;
11071 len = sizeof(struct ip6_hdr);
11072 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11077 shout = mtod(mout, struct sctphdr *);
11080 #if defined(INET) || defined(INET6)
11082 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11083 sctp_m_freem(mout);
11086 udp = (struct udphdr *)shout;
11087 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11088 udp->uh_dport = port;
11090 udp->uh_ulen = htons(sizeof(struct udphdr) +
11091 sizeof(struct sctphdr) +
11092 sizeof(struct sctp_chunkhdr) +
11093 cause_len + padding_len);
11094 len += sizeof(struct udphdr);
11095 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11100 shout->src_port = sh->dest_port;
11101 shout->dest_port = sh->src_port;
11102 shout->checksum = 0;
11104 shout->v_tag = htonl(vtag);
11106 shout->v_tag = sh->v_tag;
11108 len += sizeof(struct sctphdr);
11109 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11110 ch->chunk_type = type;
11112 ch->chunk_flags = 0;
11114 ch->chunk_flags = SCTP_HAD_NO_TCB;
11116 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11117 len += sizeof(struct sctp_chunkhdr);
11118 len += cause_len + padding_len;
11120 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11121 sctp_m_freem(mout);
11124 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11125 switch (dst->sa_family) {
11130 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11135 ip->ip_len = htons(len);
11137 #if defined(SCTP_WITH_NO_CSUM)
11138 SCTP_STAT_INCR(sctps_sendnocrc);
11140 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11141 SCTP_STAT_INCR(sctps_sendswcrc);
11144 SCTP_ENABLE_UDP_CSUM(o_pak);
11147 #if defined(SCTP_WITH_NO_CSUM)
11148 SCTP_STAT_INCR(sctps_sendnocrc);
11150 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11151 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11152 SCTP_STAT_INCR(sctps_sendhwcrc);
11155 #ifdef SCTP_PACKET_LOGGING
11156 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11157 sctp_packet_log(o_pak);
11160 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11165 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11167 #if defined(SCTP_WITH_NO_CSUM)
11168 SCTP_STAT_INCR(sctps_sendnocrc);
11170 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11171 SCTP_STAT_INCR(sctps_sendswcrc);
11173 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11174 udp->uh_sum = 0xffff;
11177 #if defined(SCTP_WITH_NO_CSUM)
11178 SCTP_STAT_INCR(sctps_sendnocrc);
11180 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11181 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11182 SCTP_STAT_INCR(sctps_sendhwcrc);
11185 #ifdef SCTP_PACKET_LOGGING
11186 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11187 sctp_packet_log(o_pak);
11190 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11194 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11196 sctp_m_freem(mout);
11197 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11200 SCTP_STAT_INCR(sctps_sendpackets);
11201 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11202 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11207 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11208 struct sctphdr *sh,
11209 uint8_t mflowtype, uint32_t mflowid,
11210 uint32_t vrf_id, uint16_t port)
11212 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11213 mflowtype, mflowid,
11218 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11219 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11224 struct sctp_tmit_chunk *chk;
11225 struct sctp_heartbeat_chunk *hb;
11226 struct timeval now;
11228 SCTP_TCB_LOCK_ASSERT(stcb);
11232 (void)SCTP_GETTIME_TIMEVAL(&now);
11233 switch (net->ro._l_addr.sa.sa_family) {
11245 sctp_alloc_a_chunk(stcb, chk);
11247 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11250 chk->copy_by_ref = 0;
11251 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11252 chk->rec.chunk_id.can_take_data = 1;
11254 chk->asoc = &stcb->asoc;
11255 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11257 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11258 if (chk->data == NULL) {
11259 sctp_free_a_chunk(stcb, chk, so_locked);
11262 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11263 SCTP_BUF_LEN(chk->data) = chk->send_size;
11264 chk->sent = SCTP_DATAGRAM_UNSENT;
11265 chk->snd_count = 0;
11267 atomic_add_int(&chk->whoTo->ref_count, 1);
11268 /* Now we have a mbuf that we can fill in with the details */
11269 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11270 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11271 /* fill out chunk header */
11272 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11273 hb->ch.chunk_flags = 0;
11274 hb->ch.chunk_length = htons(chk->send_size);
11275 /* Fill out hb parameter */
11276 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11277 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11278 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11279 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11280 /* Did our user request this one, put it in */
11281 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11282 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11283 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11285 * we only take from the entropy pool if the address is not
11288 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11289 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11291 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11292 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11294 switch (net->ro._l_addr.sa.sa_family) {
11297 memcpy(hb->heartbeat.hb_info.address,
11298 &net->ro._l_addr.sin.sin_addr,
11299 sizeof(net->ro._l_addr.sin.sin_addr));
11304 memcpy(hb->heartbeat.hb_info.address,
11305 &net->ro._l_addr.sin6.sin6_addr,
11306 sizeof(net->ro._l_addr.sin6.sin6_addr));
11313 net->hb_responded = 0;
11314 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11315 stcb->asoc.ctrl_queue_cnt++;
11316 SCTP_STAT_INCR(sctps_sendheartbeat);
11321 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11324 struct sctp_association *asoc;
11325 struct sctp_ecne_chunk *ecne;
11326 struct sctp_tmit_chunk *chk;
11331 asoc = &stcb->asoc;
11332 SCTP_TCB_LOCK_ASSERT(stcb);
11333 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11334 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11335 /* found a previous ECN_ECHO update it if needed */
11336 uint32_t cnt, ctsn;
11338 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11339 ctsn = ntohl(ecne->tsn);
11340 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11341 ecne->tsn = htonl(high_tsn);
11342 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11344 cnt = ntohl(ecne->num_pkts_since_cwr);
11346 ecne->num_pkts_since_cwr = htonl(cnt);
11350 /* nope could not find one to update so we must build one */
11351 sctp_alloc_a_chunk(stcb, chk);
11355 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11356 chk->copy_by_ref = 0;
11357 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11358 chk->rec.chunk_id.can_take_data = 0;
11360 chk->asoc = &stcb->asoc;
11361 chk->send_size = sizeof(struct sctp_ecne_chunk);
11362 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11363 if (chk->data == NULL) {
11364 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11367 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11368 SCTP_BUF_LEN(chk->data) = chk->send_size;
11369 chk->sent = SCTP_DATAGRAM_UNSENT;
11370 chk->snd_count = 0;
11372 atomic_add_int(&chk->whoTo->ref_count, 1);
11374 stcb->asoc.ecn_echo_cnt_onq++;
11375 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11376 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11377 ecne->ch.chunk_flags = 0;
11378 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11379 ecne->tsn = htonl(high_tsn);
11380 ecne->num_pkts_since_cwr = htonl(1);
11381 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11382 asoc->ctrl_queue_cnt++;
11386 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11387 struct mbuf *m, int len, int iphlen, int bad_crc)
11389 struct sctp_association *asoc;
11390 struct sctp_pktdrop_chunk *drp;
11391 struct sctp_tmit_chunk *chk;
11397 struct sctp_chunkhdr *ch, chunk_buf;
11398 unsigned int chk_length;
11403 asoc = &stcb->asoc;
11404 SCTP_TCB_LOCK_ASSERT(stcb);
11405 if (asoc->pktdrop_supported == 0) {
11407 * peer must declare support before I send one.
11411 if (stcb->sctp_socket == NULL) {
11414 sctp_alloc_a_chunk(stcb, chk);
11418 chk->copy_by_ref = 0;
11419 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11420 chk->rec.chunk_id.can_take_data = 1;
11423 chk->send_size = len;
11424 /* Validate that we do not have an ABORT in here. */
11425 offset = iphlen + sizeof(struct sctphdr);
11426 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11427 sizeof(*ch), (uint8_t *) & chunk_buf);
11428 while (ch != NULL) {
11429 chk_length = ntohs(ch->chunk_length);
11430 if (chk_length < sizeof(*ch)) {
11431 /* break to abort land */
11434 switch (ch->chunk_type) {
11435 case SCTP_PACKET_DROPPED:
11436 case SCTP_ABORT_ASSOCIATION:
11437 case SCTP_INITIATION_ACK:
11439 * We don't respond with an PKT-DROP to an ABORT
11440 * or PKT-DROP. We also do not respond to an
11441 * INIT-ACK, because we can't know if the initiation
11442 * tag is correct or not.
11444 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11449 offset += SCTP_SIZE32(chk_length);
11450 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11451 sizeof(*ch), (uint8_t *) & chunk_buf);
11454 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11455 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11457 * only send 1 mtu worth, trim off the excess on the end.
11460 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11463 chk->asoc = &stcb->asoc;
11464 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11465 if (chk->data == NULL) {
11467 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11470 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11471 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11473 sctp_m_freem(chk->data);
11477 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11478 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11479 chk->book_size_scale = 0;
11481 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11482 drp->trunc_len = htons(fullsz);
11484 * Len is already adjusted to size minus overhead above take
11485 * out the pkt_drop chunk itself from it.
11487 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11488 len = chk->send_size;
11490 /* no truncation needed */
11491 drp->ch.chunk_flags = 0;
11492 drp->trunc_len = htons(0);
11495 drp->ch.chunk_flags |= SCTP_BADCRC;
11497 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11498 SCTP_BUF_LEN(chk->data) = chk->send_size;
11499 chk->sent = SCTP_DATAGRAM_UNSENT;
11500 chk->snd_count = 0;
11502 /* we should hit here */
11504 atomic_add_int(&chk->whoTo->ref_count, 1);
11508 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11509 drp->ch.chunk_length = htons(chk->send_size);
11510 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11514 drp->bottle_bw = htonl(spc);
11515 if (asoc->my_rwnd) {
11516 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11517 asoc->size_on_all_streams +
11518 asoc->my_rwnd_control_len +
11519 stcb->sctp_socket->so_rcv.sb_cc);
11522 * If my rwnd is 0, possibly from mbuf depletion as well as
11523 * space used, tell the peer there is NO space aka onq == bw
11525 drp->current_onq = htonl(spc);
11529 m_copydata(m, iphlen, len, (caddr_t)datap);
11530 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11531 asoc->ctrl_queue_cnt++;
11535 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11537 struct sctp_association *asoc;
11538 struct sctp_cwr_chunk *cwr;
11539 struct sctp_tmit_chunk *chk;
11541 SCTP_TCB_LOCK_ASSERT(stcb);
11545 asoc = &stcb->asoc;
11546 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11547 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11549 * found a previous CWR queued to same destination
11550 * update it if needed
11554 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11555 ctsn = ntohl(cwr->tsn);
11556 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11557 cwr->tsn = htonl(high_tsn);
11559 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11560 /* Make sure override is carried */
11561 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11566 sctp_alloc_a_chunk(stcb, chk);
11570 chk->copy_by_ref = 0;
11571 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11572 chk->rec.chunk_id.can_take_data = 1;
11574 chk->asoc = &stcb->asoc;
11575 chk->send_size = sizeof(struct sctp_cwr_chunk);
11576 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11577 if (chk->data == NULL) {
11578 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11581 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11582 SCTP_BUF_LEN(chk->data) = chk->send_size;
11583 chk->sent = SCTP_DATAGRAM_UNSENT;
11584 chk->snd_count = 0;
11586 atomic_add_int(&chk->whoTo->ref_count, 1);
11587 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11588 cwr->ch.chunk_type = SCTP_ECN_CWR;
11589 cwr->ch.chunk_flags = override;
11590 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11591 cwr->tsn = htonl(high_tsn);
11592 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11593 asoc->ctrl_queue_cnt++;
11597 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11598 int number_entries, uint16_t * list,
11599 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11601 uint16_t len, old_len, i;
11602 struct sctp_stream_reset_out_request *req_out;
11603 struct sctp_chunkhdr *ch;
11605 ch = mtod(chk->data, struct sctp_chunkhdr *);
11606 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11608 /* get to new offset for the param. */
11609 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11610 /* now how long will this param be? */
11611 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11612 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11613 req_out->ph.param_length = htons(len);
11614 req_out->request_seq = htonl(seq);
11615 req_out->response_seq = htonl(resp_seq);
11616 req_out->send_reset_at_tsn = htonl(last_sent);
11617 if (number_entries) {
11618 for (i = 0; i < number_entries; i++) {
11619 req_out->list_of_streams[i] = htons(list[i]);
11622 if (SCTP_SIZE32(len) > len) {
11624 * Need to worry about the pad we may end up adding to the
11625 * end. This is easy since the struct is either aligned to 4
11626 * bytes or 2 bytes off.
11628 req_out->list_of_streams[number_entries] = 0;
11630 /* now fix the chunk length */
11631 ch->chunk_length = htons(len + old_len);
11632 chk->book_size = len + old_len;
11633 chk->book_size_scale = 0;
11634 chk->send_size = SCTP_SIZE32(chk->book_size);
11635 SCTP_BUF_LEN(chk->data) = chk->send_size;
11640 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11641 int number_entries, uint16_t * list,
11644 uint16_t len, old_len, i;
11645 struct sctp_stream_reset_in_request *req_in;
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 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11653 /* now how long will this param be? */
11654 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11655 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11656 req_in->ph.param_length = htons(len);
11657 req_in->request_seq = htonl(seq);
11658 if (number_entries) {
11659 for (i = 0; i < number_entries; i++) {
11660 req_in->list_of_streams[i] = htons(list[i]);
11663 if (SCTP_SIZE32(len) > len) {
11665 * Need to worry about the pad we may end up adding to the
11666 * end. This is easy since the struct is either aligned to 4
11667 * bytes or 2 bytes off.
11669 req_in->list_of_streams[number_entries] = 0;
11671 /* now fix the chunk length */
11672 ch->chunk_length = htons(len + old_len);
11673 chk->book_size = len + old_len;
11674 chk->book_size_scale = 0;
11675 chk->send_size = SCTP_SIZE32(chk->book_size);
11676 SCTP_BUF_LEN(chk->data) = chk->send_size;
11681 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11684 uint16_t len, old_len;
11685 struct sctp_stream_reset_tsn_request *req_tsn;
11686 struct sctp_chunkhdr *ch;
11688 ch = mtod(chk->data, struct sctp_chunkhdr *);
11689 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11691 /* get to new offset for the param. */
11692 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11693 /* now how long will this param be? */
11694 len = sizeof(struct sctp_stream_reset_tsn_request);
11695 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11696 req_tsn->ph.param_length = htons(len);
11697 req_tsn->request_seq = htonl(seq);
11699 /* now fix the chunk length */
11700 ch->chunk_length = htons(len + old_len);
11701 chk->send_size = len + old_len;
11702 chk->book_size = SCTP_SIZE32(chk->send_size);
11703 chk->book_size_scale = 0;
11704 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11709 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11710 uint32_t resp_seq, uint32_t result)
11712 uint16_t len, old_len;
11713 struct sctp_stream_reset_response *resp;
11714 struct sctp_chunkhdr *ch;
11716 ch = mtod(chk->data, struct sctp_chunkhdr *);
11717 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11719 /* get to new offset for the param. */
11720 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11721 /* now how long will this param be? */
11722 len = sizeof(struct sctp_stream_reset_response);
11723 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11724 resp->ph.param_length = htons(len);
11725 resp->response_seq = htonl(resp_seq);
11726 resp->result = ntohl(result);
11728 /* now fix the chunk length */
11729 ch->chunk_length = htons(len + old_len);
11730 chk->book_size = len + old_len;
11731 chk->book_size_scale = 0;
11732 chk->send_size = SCTP_SIZE32(chk->book_size);
11733 SCTP_BUF_LEN(chk->data) = chk->send_size;
11738 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11739 uint32_t resp_seq, uint32_t result,
11740 uint32_t send_una, uint32_t recv_next)
11742 uint16_t len, old_len;
11743 struct sctp_stream_reset_response_tsn *resp;
11744 struct sctp_chunkhdr *ch;
11746 ch = mtod(chk->data, struct sctp_chunkhdr *);
11747 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11749 /* get to new offset for the param. */
11750 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11751 /* now how long will this param be? */
11752 len = sizeof(struct sctp_stream_reset_response_tsn);
11753 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11754 resp->ph.param_length = htons(len);
11755 resp->response_seq = htonl(resp_seq);
11756 resp->result = htonl(result);
11757 resp->senders_next_tsn = htonl(send_una);
11758 resp->receivers_next_tsn = htonl(recv_next);
11760 /* now fix the chunk length */
11761 ch->chunk_length = htons(len + old_len);
11762 chk->book_size = len + old_len;
11763 chk->send_size = SCTP_SIZE32(chk->book_size);
11764 chk->book_size_scale = 0;
11765 SCTP_BUF_LEN(chk->data) = chk->send_size;
11770 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11774 uint16_t len, old_len;
11775 struct sctp_chunkhdr *ch;
11776 struct sctp_stream_reset_add_strm *addstr;
11778 ch = mtod(chk->data, struct sctp_chunkhdr *);
11779 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11781 /* get to new offset for the param. */
11782 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11783 /* now how long will this param be? */
11784 len = sizeof(struct sctp_stream_reset_add_strm);
11787 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11788 addstr->ph.param_length = htons(len);
11789 addstr->request_seq = htonl(seq);
11790 addstr->number_of_streams = htons(adding);
11791 addstr->reserved = 0;
11793 /* now fix the chunk length */
11794 ch->chunk_length = htons(len + old_len);
11795 chk->send_size = len + old_len;
11796 chk->book_size = SCTP_SIZE32(chk->send_size);
11797 chk->book_size_scale = 0;
11798 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11803 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11807 uint16_t len, old_len;
11808 struct sctp_chunkhdr *ch;
11809 struct sctp_stream_reset_add_strm *addstr;
11811 ch = mtod(chk->data, struct sctp_chunkhdr *);
11812 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11814 /* get to new offset for the param. */
11815 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11816 /* now how long will this param be? */
11817 len = sizeof(struct sctp_stream_reset_add_strm);
11819 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11820 addstr->ph.param_length = htons(len);
11821 addstr->request_seq = htonl(seq);
11822 addstr->number_of_streams = htons(adding);
11823 addstr->reserved = 0;
11825 /* now fix the chunk length */
11826 ch->chunk_length = htons(len + old_len);
11827 chk->send_size = len + old_len;
11828 chk->book_size = SCTP_SIZE32(chk->send_size);
11829 chk->book_size_scale = 0;
11830 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11835 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11836 uint16_t number_entries, uint16_t * list,
11837 uint8_t send_out_req,
11838 uint8_t send_in_req,
11839 uint8_t send_tsn_req,
11840 uint8_t add_stream,
11842 uint16_t adding_i, uint8_t peer_asked)
11845 struct sctp_association *asoc;
11846 struct sctp_tmit_chunk *chk;
11847 struct sctp_chunkhdr *ch;
11850 asoc = &stcb->asoc;
11851 if (asoc->stream_reset_outstanding) {
11853 * Already one pending, must get ACK back to clear the flag.
11855 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11858 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11859 (add_stream == 0)) {
11860 /* nothing to do */
11861 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11864 if (send_tsn_req && (send_out_req || send_in_req)) {
11865 /* error, can't do that */
11866 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11869 if (number_entries > (MCLBYTES -
11870 SCTP_MIN_OVERHEAD -
11871 sizeof(struct sctp_chunkhdr) -
11872 sizeof(struct sctp_stream_reset_out_request)) /
11873 sizeof(uint16_t)) {
11874 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11877 sctp_alloc_a_chunk(stcb, chk);
11879 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11882 chk->copy_by_ref = 0;
11883 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11884 chk->rec.chunk_id.can_take_data = 0;
11886 chk->asoc = &stcb->asoc;
11887 chk->book_size = sizeof(struct sctp_chunkhdr);
11888 chk->send_size = SCTP_SIZE32(chk->book_size);
11889 chk->book_size_scale = 0;
11891 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11892 if (chk->data == NULL) {
11893 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11894 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11897 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11899 /* setup chunk parameters */
11900 chk->sent = SCTP_DATAGRAM_UNSENT;
11901 chk->snd_count = 0;
11902 if (stcb->asoc.alternate) {
11903 chk->whoTo = stcb->asoc.alternate;
11905 chk->whoTo = stcb->asoc.primary_destination;
11907 atomic_add_int(&chk->whoTo->ref_count, 1);
11908 ch = mtod(chk->data, struct sctp_chunkhdr *);
11909 ch->chunk_type = SCTP_STREAM_RESET;
11910 ch->chunk_flags = 0;
11911 ch->chunk_length = htons(chk->book_size);
11912 SCTP_BUF_LEN(chk->data) = chk->send_size;
11914 seq = stcb->asoc.str_reset_seq_out;
11915 if (send_out_req) {
11916 sctp_add_stream_reset_out(chk, number_entries, list,
11917 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11918 asoc->stream_reset_out_is_outstanding = 1;
11920 asoc->stream_reset_outstanding++;
11922 if ((add_stream & 1) &&
11923 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11924 /* Need to allocate more */
11925 struct sctp_stream_out *oldstream;
11926 struct sctp_stream_queue_pending *sp, *nsp;
11929 #if defined(SCTP_DETAILED_STR_STATS)
11934 oldstream = stcb->asoc.strmout;
11935 /* get some more */
11936 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11937 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11939 if (stcb->asoc.strmout == NULL) {
11942 stcb->asoc.strmout = oldstream;
11943 /* Turn off the bit */
11944 x = add_stream & 0xfe;
11949 * Ok now we proceed with copying the old out stuff and
11950 * initializing the new stuff.
11952 SCTP_TCB_SEND_LOCK(stcb);
11953 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11954 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11955 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11956 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11957 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11958 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11959 stcb->asoc.strmout[i].stream_no = i;
11960 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11961 /* now anything on those queues? */
11962 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11963 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11964 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11966 /* Now move assoc pointers too */
11967 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11968 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11970 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11971 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11974 /* now the new streams */
11975 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11976 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11977 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11978 stcb->asoc.strmout[i].chunks_on_queues = 0;
11979 #if defined(SCTP_DETAILED_STR_STATS)
11980 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
11981 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
11982 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
11985 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
11986 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
11988 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11989 stcb->asoc.strmout[i].stream_no = i;
11990 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11991 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11993 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11994 SCTP_FREE(oldstream, SCTP_M_STRMO);
11995 SCTP_TCB_SEND_UNLOCK(stcb);
11998 if ((add_stream & 1) && (adding_o > 0)) {
11999 asoc->strm_pending_add_size = adding_o;
12000 asoc->peer_req_out = peer_asked;
12001 sctp_add_an_out_stream(chk, seq, adding_o);
12003 asoc->stream_reset_outstanding++;
12005 if ((add_stream & 2) && (adding_i > 0)) {
12006 sctp_add_an_in_stream(chk, seq, adding_i);
12008 asoc->stream_reset_outstanding++;
12011 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12013 asoc->stream_reset_outstanding++;
12015 if (send_tsn_req) {
12016 sctp_add_stream_reset_tsn(chk, seq);
12017 asoc->stream_reset_outstanding++;
12019 asoc->str_reset = chk;
12020 /* insert the chunk for sending */
12021 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12024 asoc->ctrl_queue_cnt++;
12025 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12030 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12031 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12032 uint8_t mflowtype, uint32_t mflowid,
12033 uint32_t vrf_id, uint16_t port)
12035 /* Don't respond to an ABORT with an ABORT. */
12036 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12038 sctp_m_freem(cause);
12041 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12042 mflowtype, mflowid,
12048 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12049 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12050 uint8_t mflowtype, uint32_t mflowid,
12051 uint32_t vrf_id, uint16_t port)
12053 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12054 mflowtype, mflowid,
12059 static struct mbuf *
12060 sctp_copy_resume(struct uio *uio,
12062 int user_marks_eor,
12065 struct mbuf **new_tail)
12069 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12070 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12072 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12075 *sndout = m_length(m, NULL);
12076 *new_tail = m_last(m);
12082 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12089 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12091 if (sp->data == NULL) {
12092 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12095 sp->tail_mbuf = m_last(sp->data);
12101 static struct sctp_stream_queue_pending *
12102 sctp_copy_it_in(struct sctp_tcb *stcb,
12103 struct sctp_association *asoc,
12104 struct sctp_sndrcvinfo *srcv,
12106 struct sctp_nets *net,
12108 int user_marks_eor,
12112 * This routine must be very careful in its work. Protocol
12113 * processing is up and running so care must be taken to spl...()
12114 * when you need to do something that may effect the stcb/asoc. The
12115 * sb is locked however. When data is copied the protocol processing
12116 * should be enabled since this is a slower operation...
12118 struct sctp_stream_queue_pending *sp = NULL;
12122 /* Now can we send this? */
12123 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12124 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12125 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12126 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12127 /* got data while shutting down */
12128 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12129 *error = ECONNRESET;
12132 sctp_alloc_a_strmoq(stcb, sp);
12134 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12139 sp->sender_all_done = 0;
12140 sp->sinfo_flags = srcv->sinfo_flags;
12141 sp->timetolive = srcv->sinfo_timetolive;
12142 sp->ppid = srcv->sinfo_ppid;
12143 sp->context = srcv->sinfo_context;
12144 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12146 sp->stream = srcv->sinfo_stream;
12147 sp->length = min(uio->uio_resid, max_send_len);
12148 if ((sp->length == (uint32_t) uio->uio_resid) &&
12149 ((user_marks_eor == 0) ||
12150 (srcv->sinfo_flags & SCTP_EOF) ||
12151 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12152 sp->msg_is_complete = 1;
12154 sp->msg_is_complete = 0;
12156 sp->sender_all_done = 0;
12157 sp->some_taken = 0;
12158 sp->put_last_out = 0;
12159 resv_in_first = sizeof(struct sctp_data_chunk);
12160 sp->data = sp->tail_mbuf = NULL;
12161 if (sp->length == 0) {
12165 if (srcv->sinfo_keynumber_valid) {
12166 sp->auth_keyid = srcv->sinfo_keynumber;
12168 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12170 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12171 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12172 sp->holds_key_ref = 1;
12174 *error = sctp_copy_one(sp, uio, resv_in_first);
12177 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12180 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12182 atomic_add_int(&sp->net->ref_count, 1);
12186 sctp_set_prsctp_policy(sp);
12194 sctp_sosend(struct socket *so,
12195 struct sockaddr *addr,
12198 struct mbuf *control,
12203 int error, use_sndinfo = 0;
12204 struct sctp_sndrcvinfo sndrcvninfo;
12205 struct sockaddr *addr_to_use;
12207 #if defined(INET) && defined(INET6)
12208 struct sockaddr_in sin;
12213 /* process cmsg snd/rcv info (maybe a assoc-id) */
12214 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12215 sizeof(sndrcvninfo))) {
12220 addr_to_use = addr;
12221 #if defined(INET) && defined(INET6)
12222 if ((addr) && (addr->sa_family == AF_INET6)) {
12223 struct sockaddr_in6 *sin6;
12225 sin6 = (struct sockaddr_in6 *)addr;
12226 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12227 in6_sin6_2_sin(&sin, sin6);
12228 addr_to_use = (struct sockaddr *)&sin;
12232 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12235 use_sndinfo ? &sndrcvninfo : NULL
12243 sctp_lower_sosend(struct socket *so,
12244 struct sockaddr *addr,
12246 struct mbuf *i_pak,
12247 struct mbuf *control,
12249 struct sctp_sndrcvinfo *srcv
12254 unsigned int sndlen = 0, max_len;
12256 struct mbuf *top = NULL;
12257 int queue_only = 0, queue_only_for_init = 0;
12258 int free_cnt_applied = 0;
12260 int now_filled = 0;
12261 unsigned int inqueue_bytes = 0;
12262 struct sctp_block_entry be;
12263 struct sctp_inpcb *inp;
12264 struct sctp_tcb *stcb = NULL;
12265 struct timeval now;
12266 struct sctp_nets *net;
12267 struct sctp_association *asoc;
12268 struct sctp_inpcb *t_inp;
12269 int user_marks_eor;
12270 int create_lock_applied = 0;
12271 int nagle_applies = 0;
12272 int some_on_control = 0;
12273 int got_all_of_the_send = 0;
12274 int hold_tcblock = 0;
12275 int non_blocking = 0;
12276 uint32_t local_add_more, local_soresv = 0;
12278 uint16_t sinfo_flags;
12279 sctp_assoc_t sinfo_assoc_id;
12286 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12288 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12291 SCTP_RELEASE_PKT(i_pak);
12295 if ((uio == NULL) && (i_pak == NULL)) {
12296 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12299 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12300 atomic_add_int(&inp->total_sends, 1);
12302 if (uio->uio_resid < 0) {
12303 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12306 sndlen = uio->uio_resid;
12308 top = SCTP_HEADER_TO_CHAIN(i_pak);
12309 sndlen = SCTP_HEADER_LEN(i_pak);
12311 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12314 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12315 (inp->sctp_socket->so_qlimit)) {
12316 /* The listener can NOT send */
12317 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12322 * Pre-screen address, if one is given the sin-len
12323 * must be set correctly!
12326 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12328 switch (raddr->sa.sa_family) {
12331 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12332 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12336 port = raddr->sin.sin_port;
12341 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12342 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12346 port = raddr->sin6.sin6_port;
12350 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12351 error = EAFNOSUPPORT;
12358 sinfo_flags = srcv->sinfo_flags;
12359 sinfo_assoc_id = srcv->sinfo_assoc_id;
12360 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12361 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12362 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12366 if (srcv->sinfo_flags)
12367 SCTP_STAT_INCR(sctps_sends_with_flags);
12369 sinfo_flags = inp->def_send.sinfo_flags;
12370 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12372 if (sinfo_flags & SCTP_SENDALL) {
12373 /* its a sendall */
12374 error = sctp_sendall(inp, uio, top, srcv);
12378 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12379 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12383 /* now we must find the assoc */
12384 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12385 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12386 SCTP_INP_RLOCK(inp);
12387 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12389 SCTP_TCB_LOCK(stcb);
12392 SCTP_INP_RUNLOCK(inp);
12393 } else if (sinfo_assoc_id) {
12394 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12397 * Since we did not use findep we must
12398 * increment it, and if we don't find a tcb
12401 SCTP_INP_WLOCK(inp);
12402 SCTP_INP_INCR_REF(inp);
12403 SCTP_INP_WUNLOCK(inp);
12404 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12405 if (stcb == NULL) {
12406 SCTP_INP_WLOCK(inp);
12407 SCTP_INP_DECR_REF(inp);
12408 SCTP_INP_WUNLOCK(inp);
12413 if ((stcb == NULL) && (addr)) {
12414 /* Possible implicit send? */
12415 SCTP_ASOC_CREATE_LOCK(inp);
12416 create_lock_applied = 1;
12417 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12418 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12419 /* Should I really unlock ? */
12420 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12425 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12426 (addr->sa_family == AF_INET6)) {
12427 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12431 SCTP_INP_WLOCK(inp);
12432 SCTP_INP_INCR_REF(inp);
12433 SCTP_INP_WUNLOCK(inp);
12434 /* With the lock applied look again */
12435 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12436 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12437 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12439 if (stcb == NULL) {
12440 SCTP_INP_WLOCK(inp);
12441 SCTP_INP_DECR_REF(inp);
12442 SCTP_INP_WUNLOCK(inp);
12449 if (t_inp != inp) {
12450 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12455 if (stcb == NULL) {
12456 if (addr == NULL) {
12457 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12461 /* We must go ahead and start the INIT process */
12464 if ((sinfo_flags & SCTP_ABORT) ||
12465 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12467 * User asks to abort a non-existant assoc,
12468 * or EOF a non-existant assoc with no data
12470 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12474 /* get an asoc/stcb struct */
12475 vrf_id = inp->def_vrf_id;
12477 if (create_lock_applied == 0) {
12478 panic("Error, should hold create lock and I don't?");
12481 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12484 if (stcb == NULL) {
12485 /* Error is setup for us in the call */
12488 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12489 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12491 * Set the connected flag so we can queue
12494 soisconnecting(so);
12497 if (create_lock_applied) {
12498 SCTP_ASOC_CREATE_UNLOCK(inp);
12499 create_lock_applied = 0;
12501 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12504 * Turn on queue only flag to prevent data from
12508 asoc = &stcb->asoc;
12509 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12510 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12512 /* initialize authentication params for the assoc */
12513 sctp_initialize_auth_params(inp, stcb);
12516 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12517 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12523 /* out with the INIT */
12524 queue_only_for_init = 1;
12526 * we may want to dig in after this call and adjust the MTU
12527 * value. It defaulted to 1500 (constant) but the ro
12528 * structure may now have an update and thus we may need to
12529 * change it BEFORE we append the message.
12533 asoc = &stcb->asoc;
12535 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12536 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12538 net = sctp_findnet(stcb, addr);
12541 if ((net == NULL) ||
12542 ((port != 0) && (port != stcb->rport))) {
12543 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12548 if (stcb->asoc.alternate) {
12549 net = stcb->asoc.alternate;
12551 net = stcb->asoc.primary_destination;
12554 atomic_add_int(&stcb->total_sends, 1);
12555 /* Keep the stcb from being freed under our feet */
12556 atomic_add_int(&asoc->refcnt, 1);
12557 free_cnt_applied = 1;
12559 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12560 if (sndlen > asoc->smallest_mtu) {
12561 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12566 if (SCTP_SO_IS_NBIO(so)
12567 || (flags & MSG_NBIO)
12571 /* would we block? */
12572 if (non_blocking) {
12573 if (hold_tcblock == 0) {
12574 SCTP_TCB_LOCK(stcb);
12577 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12578 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12579 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12580 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12581 if (sndlen > SCTP_SB_LIMIT_SND(so))
12584 error = EWOULDBLOCK;
12587 stcb->asoc.sb_send_resv += sndlen;
12588 SCTP_TCB_UNLOCK(stcb);
12591 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12593 local_soresv = sndlen;
12594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12595 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12596 error = ECONNRESET;
12599 if (create_lock_applied) {
12600 SCTP_ASOC_CREATE_UNLOCK(inp);
12601 create_lock_applied = 0;
12603 if (asoc->stream_reset_outstanding) {
12605 * Can't queue any data while stream reset is underway.
12607 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12611 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12612 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12615 /* we are now done with all control */
12617 sctp_m_freem(control);
12620 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12621 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12622 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12623 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12624 if (srcv->sinfo_flags & SCTP_ABORT) {
12627 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12628 error = ECONNRESET;
12632 /* Ok, we will attempt a msgsnd :> */
12634 p->td_ru.ru_msgsnd++;
12636 /* Are we aborting? */
12637 if (srcv->sinfo_flags & SCTP_ABORT) {
12639 int tot_demand, tot_out = 0, max_out;
12641 SCTP_STAT_INCR(sctps_sends_with_abort);
12642 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12643 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12644 /* It has to be up before we abort */
12645 /* how big is the user initiated abort? */
12646 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12650 if (hold_tcblock) {
12651 SCTP_TCB_UNLOCK(stcb);
12655 struct mbuf *cntm = NULL;
12657 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12659 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12660 tot_out += SCTP_BUF_LEN(cntm);
12664 /* Must fit in a MTU */
12666 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12667 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12669 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12673 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12676 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12680 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12681 max_out -= sizeof(struct sctp_abort_msg);
12682 if (tot_out > max_out) {
12686 struct sctp_paramhdr *ph;
12688 /* now move forward the data pointer */
12689 ph = mtod(mm, struct sctp_paramhdr *);
12690 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12691 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12693 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12695 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12698 * Here if we can't get his data we
12699 * still abort we just don't get to
12700 * send the users note :-0
12707 SCTP_BUF_NEXT(mm) = top;
12711 if (hold_tcblock == 0) {
12712 SCTP_TCB_LOCK(stcb);
12714 atomic_add_int(&stcb->asoc.refcnt, -1);
12715 free_cnt_applied = 0;
12716 /* release this lock, otherwise we hang on ourselves */
12717 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12718 /* now relock the stcb so everything is sane */
12722 * In this case top is already chained to mm avoid double
12723 * free, since we free it below if top != NULL and driver
12724 * would free it after sending the packet out
12731 /* Calculate the maximum we can send */
12732 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12733 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12734 if (non_blocking) {
12735 /* we already checked for non-blocking above. */
12738 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12743 if (hold_tcblock) {
12744 SCTP_TCB_UNLOCK(stcb);
12747 /* Is the stream no. valid? */
12748 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12749 /* Invalid stream number */
12750 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12754 if (asoc->strmout == NULL) {
12755 /* huh? software error */
12756 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12760 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12761 if ((user_marks_eor == 0) &&
12762 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12763 /* It will NEVER fit */
12764 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12768 if ((uio == NULL) && user_marks_eor) {
12770 * We do not support eeor mode for
12771 * sending with mbuf chains (like sendfile).
12773 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12777 if (user_marks_eor) {
12778 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12781 * For non-eeor the whole message must fit in
12782 * the socket send buffer.
12784 local_add_more = sndlen;
12787 if (non_blocking) {
12788 goto skip_preblock;
12790 if (((max_len <= local_add_more) &&
12791 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12793 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12794 /* No room right now ! */
12795 SOCKBUF_LOCK(&so->so_snd);
12796 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12797 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12798 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12799 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12800 (unsigned int)SCTP_SB_LIMIT_SND(so),
12803 stcb->asoc.stream_queue_cnt,
12804 stcb->asoc.chunks_on_out_queue,
12805 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12806 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12807 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12810 stcb->block_entry = &be;
12811 error = sbwait(&so->so_snd);
12812 stcb->block_entry = NULL;
12813 if (error || so->so_error || be.error) {
12816 error = so->so_error;
12821 SOCKBUF_UNLOCK(&so->so_snd);
12824 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12825 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12826 asoc, stcb->asoc.total_output_queue_size);
12828 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12831 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12833 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12834 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12838 SOCKBUF_UNLOCK(&so->so_snd);
12841 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12845 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12846 * case NOTE: uio will be null when top/mbuf is passed
12849 if (srcv->sinfo_flags & SCTP_EOF) {
12850 got_all_of_the_send = 1;
12853 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12859 struct sctp_stream_queue_pending *sp;
12860 struct sctp_stream_out *strm;
12863 SCTP_TCB_SEND_LOCK(stcb);
12864 if ((asoc->stream_locked) &&
12865 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12866 SCTP_TCB_SEND_UNLOCK(stcb);
12867 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12871 SCTP_TCB_SEND_UNLOCK(stcb);
12873 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12874 if (strm->last_msg_incomplete == 0) {
12876 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12877 if ((sp == NULL) || (error)) {
12880 SCTP_TCB_SEND_LOCK(stcb);
12881 if (sp->msg_is_complete) {
12882 strm->last_msg_incomplete = 0;
12883 asoc->stream_locked = 0;
12886 * Just got locked to this guy in case of an
12889 strm->last_msg_incomplete = 1;
12890 asoc->stream_locked = 1;
12891 asoc->stream_locked_on = srcv->sinfo_stream;
12892 sp->sender_all_done = 0;
12894 sctp_snd_sb_alloc(stcb, sp->length);
12895 atomic_add_int(&asoc->stream_queue_cnt, 1);
12896 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12897 SCTP_STAT_INCR(sctps_sends_with_unord);
12899 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12900 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12901 SCTP_TCB_SEND_UNLOCK(stcb);
12903 SCTP_TCB_SEND_LOCK(stcb);
12904 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12905 SCTP_TCB_SEND_UNLOCK(stcb);
12907 /* ???? Huh ??? last msg is gone */
12909 panic("Warning: Last msg marked incomplete, yet nothing left?");
12911 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12912 strm->last_msg_incomplete = 0;
12918 while (uio->uio_resid > 0) {
12919 /* How much room do we have? */
12920 struct mbuf *new_tail, *mm;
12922 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12923 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12927 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12928 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12929 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12932 if (hold_tcblock) {
12933 SCTP_TCB_UNLOCK(stcb);
12936 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12937 if ((mm == NULL) || error) {
12943 /* Update the mbuf and count */
12944 SCTP_TCB_SEND_LOCK(stcb);
12945 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12947 * we need to get out. Peer probably
12951 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12952 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12953 error = ECONNRESET;
12955 SCTP_TCB_SEND_UNLOCK(stcb);
12958 if (sp->tail_mbuf) {
12959 /* tack it to the end */
12960 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12961 sp->tail_mbuf = new_tail;
12963 /* A stolen mbuf */
12965 sp->tail_mbuf = new_tail;
12967 sctp_snd_sb_alloc(stcb, sndout);
12968 atomic_add_int(&sp->length, sndout);
12971 /* Did we reach EOR? */
12972 if ((uio->uio_resid == 0) &&
12973 ((user_marks_eor == 0) ||
12974 (srcv->sinfo_flags & SCTP_EOF) ||
12975 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12976 sp->msg_is_complete = 1;
12978 sp->msg_is_complete = 0;
12980 SCTP_TCB_SEND_UNLOCK(stcb);
12982 if (uio->uio_resid == 0) {
12987 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
12989 * This is ugly but we must assure locking
12992 if (hold_tcblock == 0) {
12993 SCTP_TCB_LOCK(stcb);
12996 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12997 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12998 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12999 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13005 SCTP_TCB_UNLOCK(stcb);
13008 /* wait for space now */
13009 if (non_blocking) {
13010 /* Non-blocking io in place out */
13013 /* What about the INIT, send it maybe */
13014 if (queue_only_for_init) {
13015 if (hold_tcblock == 0) {
13016 SCTP_TCB_LOCK(stcb);
13019 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13020 /* a collision took us forward? */
13023 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13024 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13028 if ((net->flight_size > net->cwnd) &&
13029 (asoc->sctp_cmt_on_off == 0)) {
13030 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13032 } else if (asoc->ifp_had_enobuf) {
13033 SCTP_STAT_INCR(sctps_ifnomemqueued);
13034 if (net->flight_size > (2 * net->mtu)) {
13037 asoc->ifp_had_enobuf = 0;
13039 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13040 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13041 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13042 (stcb->asoc.total_flight > 0) &&
13043 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13044 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13047 * Ok, Nagle is set on and we have data outstanding.
13048 * Don't send anything and let SACKs drive out the
13049 * data unless wen have a "full" segment to send.
13051 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13052 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13054 SCTP_STAT_INCR(sctps_naglequeued);
13057 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13058 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13059 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13061 SCTP_STAT_INCR(sctps_naglesent);
13064 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13066 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13067 nagle_applies, un_sent);
13068 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13069 stcb->asoc.total_flight,
13070 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13072 if (queue_only_for_init)
13073 queue_only_for_init = 0;
13074 if ((queue_only == 0) && (nagle_applies == 0)) {
13076 * need to start chunk output
13077 * before blocking.. note that if
13078 * a lock is already applied, then
13079 * the input via the net is happening
13080 * and I don't need to start output :-D
13082 if (hold_tcblock == 0) {
13083 if (SCTP_TCB_TRYLOCK(stcb)) {
13085 sctp_chunk_output(inp,
13087 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13090 sctp_chunk_output(inp,
13092 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13094 if (hold_tcblock == 1) {
13095 SCTP_TCB_UNLOCK(stcb);
13099 SOCKBUF_LOCK(&so->so_snd);
13101 * This is a bit strange, but I think it will
13102 * work. The total_output_queue_size is locked and
13103 * protected by the TCB_LOCK, which we just released.
13104 * There is a race that can occur between releasing it
13105 * above, and me getting the socket lock, where sacks
13106 * come in but we have not put the SB_WAIT on the
13107 * so_snd buffer to get the wakeup. After the LOCK
13108 * is applied the sack_processing will also need to
13109 * LOCK the so->so_snd to do the actual sowwakeup(). So
13110 * once we have the socket buffer lock if we recheck the
13111 * size we KNOW we will get to sleep safely with the
13112 * wakeup flag in place.
13114 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13115 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13116 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13117 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13118 asoc, uio->uio_resid);
13121 stcb->block_entry = &be;
13122 error = sbwait(&so->so_snd);
13123 stcb->block_entry = NULL;
13125 if (error || so->so_error || be.error) {
13128 error = so->so_error;
13133 SOCKBUF_UNLOCK(&so->so_snd);
13136 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13137 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13138 asoc, stcb->asoc.total_output_queue_size);
13141 SOCKBUF_UNLOCK(&so->so_snd);
13142 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13146 SCTP_TCB_SEND_LOCK(stcb);
13148 if (sp->msg_is_complete == 0) {
13149 strm->last_msg_incomplete = 1;
13150 asoc->stream_locked = 1;
13151 asoc->stream_locked_on = srcv->sinfo_stream;
13153 sp->sender_all_done = 1;
13154 strm->last_msg_incomplete = 0;
13155 asoc->stream_locked = 0;
13158 SCTP_PRINTF("Huh no sp TSNH?\n");
13159 strm->last_msg_incomplete = 0;
13160 asoc->stream_locked = 0;
13162 SCTP_TCB_SEND_UNLOCK(stcb);
13163 if (uio->uio_resid == 0) {
13164 got_all_of_the_send = 1;
13167 /* We send in a 0, since we do NOT have any locks */
13168 error = sctp_msg_append(stcb, net, top, srcv, 0);
13170 if (srcv->sinfo_flags & SCTP_EOF) {
13172 * This should only happen for Panda for the mbuf
13173 * send case, which does NOT yet support EEOR mode.
13174 * Thus, we can just set this flag to do the proper
13177 got_all_of_the_send = 1;
13185 if ((srcv->sinfo_flags & SCTP_EOF) &&
13186 (got_all_of_the_send == 1)) {
13189 SCTP_STAT_INCR(sctps_sends_with_eof);
13191 if (hold_tcblock == 0) {
13192 SCTP_TCB_LOCK(stcb);
13195 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13196 if (TAILQ_EMPTY(&asoc->send_queue) &&
13197 TAILQ_EMPTY(&asoc->sent_queue) &&
13199 if (asoc->locked_on_sending) {
13202 /* there is nothing queued to send, so I'm done... */
13203 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13204 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13205 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13206 struct sctp_nets *netp;
13208 /* only send SHUTDOWN the first time through */
13209 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13210 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13212 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13213 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13214 sctp_stop_timers_for_shutdown(stcb);
13215 if (stcb->asoc.alternate) {
13216 netp = stcb->asoc.alternate;
13218 netp = stcb->asoc.primary_destination;
13220 sctp_send_shutdown(stcb, netp);
13221 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13223 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13224 asoc->primary_destination);
13228 * we still got (or just got) data to send, so set
13232 * XXX sockets draft says that SCTP_EOF should be
13233 * sent with no data. currently, we will allow user
13234 * data to be sent first and move to
13237 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13238 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13239 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13240 if (hold_tcblock == 0) {
13241 SCTP_TCB_LOCK(stcb);
13244 if (asoc->locked_on_sending) {
13245 /* Locked to send out the data */
13246 struct sctp_stream_queue_pending *sp;
13248 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13250 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13251 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13254 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13255 if (TAILQ_EMPTY(&asoc->send_queue) &&
13256 TAILQ_EMPTY(&asoc->sent_queue) &&
13257 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13259 if (free_cnt_applied) {
13260 atomic_add_int(&stcb->asoc.refcnt, -1);
13261 free_cnt_applied = 0;
13263 sctp_abort_an_association(stcb->sctp_ep, stcb,
13264 NULL, SCTP_SO_LOCKED);
13266 * now relock the stcb so everything
13273 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13274 asoc->primary_destination);
13275 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13280 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13281 some_on_control = 1;
13283 if (queue_only_for_init) {
13284 if (hold_tcblock == 0) {
13285 SCTP_TCB_LOCK(stcb);
13288 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13289 /* a collision took us forward? */
13292 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13293 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13297 if ((net->flight_size > net->cwnd) &&
13298 (stcb->asoc.sctp_cmt_on_off == 0)) {
13299 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13301 } else if (asoc->ifp_had_enobuf) {
13302 SCTP_STAT_INCR(sctps_ifnomemqueued);
13303 if (net->flight_size > (2 * net->mtu)) {
13306 asoc->ifp_had_enobuf = 0;
13308 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13309 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13310 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13311 (stcb->asoc.total_flight > 0) &&
13312 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13313 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13315 * Ok, Nagle is set on and we have data outstanding.
13316 * Don't send anything and let SACKs drive out the
13317 * data unless wen have a "full" segment to send.
13319 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13320 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13322 SCTP_STAT_INCR(sctps_naglequeued);
13325 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13326 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13327 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13329 SCTP_STAT_INCR(sctps_naglesent);
13332 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13333 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13334 nagle_applies, un_sent);
13335 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13336 stcb->asoc.total_flight,
13337 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13339 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13340 /* we can attempt to send too. */
13341 if (hold_tcblock == 0) {
13343 * If there is activity recv'ing sacks no need to
13346 if (SCTP_TCB_TRYLOCK(stcb)) {
13347 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13351 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13353 } else if ((queue_only == 0) &&
13354 (stcb->asoc.peers_rwnd == 0) &&
13355 (stcb->asoc.total_flight == 0)) {
13356 /* We get to have a probe outstanding */
13357 if (hold_tcblock == 0) {
13359 SCTP_TCB_LOCK(stcb);
13361 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13362 } else if (some_on_control) {
13363 int num_out, reason, frag_point;
13365 /* Here we do control only */
13366 if (hold_tcblock == 0) {
13368 SCTP_TCB_LOCK(stcb);
13370 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13371 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13372 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13374 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13375 queue_only, stcb->asoc.peers_rwnd, un_sent,
13376 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13377 stcb->asoc.total_output_queue_size, error);
13382 if (local_soresv && stcb) {
13383 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13385 if (create_lock_applied) {
13386 SCTP_ASOC_CREATE_UNLOCK(inp);
13388 if ((stcb) && hold_tcblock) {
13389 SCTP_TCB_UNLOCK(stcb);
13391 if (stcb && free_cnt_applied) {
13392 atomic_add_int(&stcb->asoc.refcnt, -1);
13396 if (mtx_owned(&stcb->tcb_mtx)) {
13397 panic("Leaving with tcb mtx owned?");
13399 if (mtx_owned(&stcb->tcb_send_mtx)) {
13400 panic("Leaving with tcb send mtx owned?");
13406 sctp_validate_no_locks(inp);
13408 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13415 sctp_m_freem(control);
13422 * generate an AUTHentication chunk, if required
13425 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13426 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13427 struct sctp_tcb *stcb, uint8_t chunk)
13429 struct mbuf *m_auth;
13430 struct sctp_auth_chunk *auth;
13434 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13438 if (stcb->asoc.auth_supported == 0) {
13441 /* does the requested chunk require auth? */
13442 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13445 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13446 if (m_auth == NULL) {
13450 /* reserve some space if this will be the first mbuf */
13452 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13453 /* fill in the AUTH chunk details */
13454 auth = mtod(m_auth, struct sctp_auth_chunk *);
13455 bzero(auth, sizeof(*auth));
13456 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13457 auth->ch.chunk_flags = 0;
13458 chunk_len = sizeof(*auth) +
13459 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13460 auth->ch.chunk_length = htons(chunk_len);
13461 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13462 /* key id and hmac digest will be computed and filled in upon send */
13464 /* save the offset where the auth was inserted into the chain */
13466 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13467 *offset += SCTP_BUF_LEN(cn);
13470 /* update length and return pointer to the auth chunk */
13471 SCTP_BUF_LEN(m_auth) = chunk_len;
13472 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13473 if (auth_ret != NULL)
13481 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13483 struct nd_prefix *pfx = NULL;
13484 struct nd_pfxrouter *pfxrtr = NULL;
13485 struct sockaddr_in6 gw6;
13487 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13490 /* get prefix entry of address */
13491 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13492 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13494 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13495 &src6->sin6_addr, &pfx->ndpr_mask))
13498 /* no prefix entry in the prefix list */
13500 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13501 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13504 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13505 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13507 /* search installed gateway from prefix entry */
13508 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13509 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13510 gw6.sin6_family = AF_INET6;
13511 gw6.sin6_len = sizeof(struct sockaddr_in6);
13512 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13513 sizeof(struct in6_addr));
13514 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13515 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13516 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13517 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13518 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13519 ro->ro_rt->rt_gateway)) {
13520 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13524 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13531 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13534 struct sockaddr_in *sin, *mask;
13535 struct ifaddr *ifa;
13536 struct in_addr srcnetaddr, gwnetaddr;
13538 if (ro == NULL || ro->ro_rt == NULL ||
13539 sifa->address.sa.sa_family != AF_INET) {
13542 ifa = (struct ifaddr *)sifa->ifa;
13543 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13544 sin = &sifa->address.sin;
13545 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13546 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13547 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13548 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13550 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13551 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13552 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13553 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13554 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13555 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {