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 use_mflowid, 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;
4094 if (net->flowidset == 0) {
4095 panic("Flow ID not set");
4098 m->m_pkthdr.flowid = net->flowid;
4099 m->m_flags |= M_FLOWID;
4101 if (use_mflowid != 0) {
4102 m->m_pkthdr.flowid = mflowid;
4103 m->m_flags |= M_FLOWID;
4106 packet_length = sctp_calculate_len(m);
4107 ip = mtod(m, struct ip *);
4108 ip->ip_v = IPVERSION;
4109 ip->ip_hl = (sizeof(struct ip) >> 2);
4110 if (tos_value == 0) {
4112 * This means especially, that it is not set
4113 * at the SCTP layer. So use the value from
4116 tos_value = inp->ip_inp.inp.inp_ip_tos;
4120 tos_value |= sctp_get_ect(stcb);
4122 if ((nofragment_flag) && (port == 0)) {
4123 ip->ip_off = htons(IP_DF);
4125 ip->ip_off = htons(0);
4127 /* FreeBSD has a function for ip_id's */
4128 ip->ip_id = ip_newid();
4130 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4131 ip->ip_len = htons(packet_length);
4132 ip->ip_tos = tos_value;
4134 ip->ip_p = IPPROTO_UDP;
4136 ip->ip_p = IPPROTO_SCTP;
4141 memset(&iproute, 0, sizeof(iproute));
4142 memcpy(&ro->ro_dst, to, to->sa_len);
4144 ro = (sctp_route_t *) & net->ro;
4146 /* Now the address selection part */
4147 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4149 /* call the routine to select the src address */
4150 if (net && out_of_asoc_ok == 0) {
4151 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4152 sctp_free_ifa(net->ro._s_addr);
4153 net->ro._s_addr = NULL;
4154 net->src_addr_selected = 0;
4160 if (net->src_addr_selected == 0) {
4161 /* Cache the source address */
4162 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4165 net->src_addr_selected = 1;
4167 if (net->ro._s_addr == NULL) {
4168 /* No route to host */
4169 net->src_addr_selected = 0;
4170 sctp_handle_no_route(stcb, net, so_locked);
4171 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4173 return (EHOSTUNREACH);
4175 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4177 if (over_addr == NULL) {
4178 struct sctp_ifa *_lsrc;
4180 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4184 if (_lsrc == NULL) {
4185 sctp_handle_no_route(stcb, net, so_locked);
4186 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4188 return (EHOSTUNREACH);
4190 ip->ip_src = _lsrc->address.sin.sin_addr;
4191 sctp_free_ifa(_lsrc);
4193 ip->ip_src = over_addr->sin.sin_addr;
4194 SCTP_RTALLOC(ro, vrf_id);
4198 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4199 sctp_handle_no_route(stcb, net, so_locked);
4200 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4202 return (EHOSTUNREACH);
4204 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4205 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4206 udp->uh_dport = port;
4207 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4209 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4213 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4215 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4218 sctphdr->src_port = src_port;
4219 sctphdr->dest_port = dest_port;
4220 sctphdr->v_tag = v_tag;
4221 sctphdr->checksum = 0;
4224 * If source address selection fails and we find no
4225 * route then the ip_output should fail as well with
4226 * a NO_ROUTE_TO_HOST type error. We probably should
4227 * catch that somewhere and abort the association
4228 * right away (assuming this is an INIT being sent).
4230 if (ro->ro_rt == NULL) {
4232 * src addr selection failed to find a route
4233 * (or valid source addr), so we can't get
4234 * there from here (yet)!
4236 sctp_handle_no_route(stcb, net, so_locked);
4237 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4239 return (EHOSTUNREACH);
4241 if (ro != &iproute) {
4242 memcpy(&iproute, ro, sizeof(*ro));
4244 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4245 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4246 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4247 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4248 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4251 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4252 /* failed to prepend data, give up */
4253 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4257 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4259 #if defined(SCTP_WITH_NO_CSUM)
4260 SCTP_STAT_INCR(sctps_sendnocrc);
4262 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4263 SCTP_STAT_INCR(sctps_sendswcrc);
4266 SCTP_ENABLE_UDP_CSUM(o_pak);
4269 #if defined(SCTP_WITH_NO_CSUM)
4270 SCTP_STAT_INCR(sctps_sendnocrc);
4272 m->m_pkthdr.csum_flags = CSUM_SCTP;
4273 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4274 SCTP_STAT_INCR(sctps_sendhwcrc);
4277 #ifdef SCTP_PACKET_LOGGING
4278 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4279 sctp_packet_log(o_pak);
4281 /* send it out. table id is taken from stcb */
4282 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4283 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4284 so = SCTP_INP_SO(inp);
4285 SCTP_SOCKET_UNLOCK(so, 0);
4288 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4289 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4290 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4291 atomic_add_int(&stcb->asoc.refcnt, 1);
4292 SCTP_TCB_UNLOCK(stcb);
4293 SCTP_SOCKET_LOCK(so, 0);
4294 SCTP_TCB_LOCK(stcb);
4295 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4298 SCTP_STAT_INCR(sctps_sendpackets);
4299 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4301 SCTP_STAT_INCR(sctps_senderrors);
4303 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4305 /* free tempy routes */
4309 * PMTU check versus smallest asoc MTU goes
4312 if ((ro->ro_rt != NULL) &&
4313 (net->ro._s_addr)) {
4316 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4318 mtu -= sizeof(struct udphdr);
4320 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4321 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4324 } else if (ro->ro_rt == NULL) {
4325 /* route was freed */
4326 if (net->ro._s_addr &&
4327 net->src_addr_selected) {
4328 sctp_free_ifa(net->ro._s_addr);
4329 net->ro._s_addr = NULL;
4331 net->src_addr_selected = 0;
4340 uint32_t flowlabel, flowinfo;
4341 struct ip6_hdr *ip6h;
4342 struct route_in6 ip6route;
4344 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4346 struct sockaddr_in6 lsa6_storage;
4348 u_short prev_port = 0;
4352 flowlabel = net->flowlabel;
4354 flowlabel = stcb->asoc.default_flowlabel;
4356 flowlabel = inp->sctp_ep.default_flowlabel;
4358 if (flowlabel == 0) {
4360 * This means especially, that it is not set
4361 * at the SCTP layer. So use the value from
4364 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4366 flowlabel &= 0x000fffff;
4367 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4369 len += sizeof(struct udphdr);
4371 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4374 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4377 SCTP_ALIGN_TO_END(newm, len);
4378 SCTP_BUF_LEN(newm) = len;
4379 SCTP_BUF_NEXT(newm) = m;
4383 if (net->flowidset == 0) {
4384 panic("Flow ID not set");
4387 m->m_pkthdr.flowid = net->flowid;
4388 m->m_flags |= M_FLOWID;
4390 if (use_mflowid != 0) {
4391 m->m_pkthdr.flowid = mflowid;
4392 m->m_flags |= M_FLOWID;
4395 packet_length = sctp_calculate_len(m);
4397 ip6h = mtod(m, struct ip6_hdr *);
4398 /* protect *sin6 from overwrite */
4399 sin6 = (struct sockaddr_in6 *)to;
4403 /* KAME hack: embed scopeid */
4404 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4405 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4409 memset(&ip6route, 0, sizeof(ip6route));
4410 ro = (sctp_route_t *) & ip6route;
4411 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4413 ro = (sctp_route_t *) & net->ro;
4416 * We assume here that inp_flow is in host byte
4417 * order within the TCB!
4419 if (tos_value == 0) {
4421 * This means especially, that it is not set
4422 * at the SCTP layer. So use the value from
4425 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4429 tos_value |= sctp_get_ect(stcb);
4433 flowinfo |= tos_value;
4435 flowinfo |= flowlabel;
4436 ip6h->ip6_flow = htonl(flowinfo);
4438 ip6h->ip6_nxt = IPPROTO_UDP;
4440 ip6h->ip6_nxt = IPPROTO_SCTP;
4442 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4443 ip6h->ip6_dst = sin6->sin6_addr;
4446 * Add SRC address selection here: we can only reuse
4447 * to a limited degree the kame src-addr-sel, since
4448 * we can try their selection but it may not be
4451 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4452 lsa6_tmp.sin6_family = AF_INET6;
4453 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4455 if (net && out_of_asoc_ok == 0) {
4456 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4457 sctp_free_ifa(net->ro._s_addr);
4458 net->ro._s_addr = NULL;
4459 net->src_addr_selected = 0;
4465 if (net->src_addr_selected == 0) {
4466 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4467 /* KAME hack: embed scopeid */
4468 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4469 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4472 /* Cache the source address */
4473 net->ro._s_addr = sctp_source_address_selection(inp,
4479 (void)sa6_recoverscope(sin6);
4480 net->src_addr_selected = 1;
4482 if (net->ro._s_addr == NULL) {
4483 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4484 net->src_addr_selected = 0;
4485 sctp_handle_no_route(stcb, net, so_locked);
4486 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4488 return (EHOSTUNREACH);
4490 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4492 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4493 /* KAME hack: embed scopeid */
4494 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4495 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4498 if (over_addr == NULL) {
4499 struct sctp_ifa *_lsrc;
4501 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4505 if (_lsrc == NULL) {
4506 sctp_handle_no_route(stcb, net, so_locked);
4507 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4509 return (EHOSTUNREACH);
4511 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4512 sctp_free_ifa(_lsrc);
4514 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4515 SCTP_RTALLOC(ro, vrf_id);
4517 (void)sa6_recoverscope(sin6);
4519 lsa6->sin6_port = inp->sctp_lport;
4521 if (ro->ro_rt == NULL) {
4523 * src addr selection failed to find a route
4524 * (or valid source addr), so we can't get
4527 sctp_handle_no_route(stcb, net, so_locked);
4528 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4530 return (EHOSTUNREACH);
4533 * XXX: sa6 may not have a valid sin6_scope_id in
4534 * the non-SCOPEDROUTING case.
4536 bzero(&lsa6_storage, sizeof(lsa6_storage));
4537 lsa6_storage.sin6_family = AF_INET6;
4538 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4539 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4540 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4541 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4546 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4547 lsa6_storage.sin6_port = inp->sctp_lport;
4548 lsa6 = &lsa6_storage;
4549 ip6h->ip6_src = lsa6->sin6_addr;
4552 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4553 sctp_handle_no_route(stcb, net, so_locked);
4554 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4556 return (EHOSTUNREACH);
4558 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4559 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4560 udp->uh_dport = port;
4561 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4563 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4565 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4568 sctphdr->src_port = src_port;
4569 sctphdr->dest_port = dest_port;
4570 sctphdr->v_tag = v_tag;
4571 sctphdr->checksum = 0;
4574 * We set the hop limit now since there is a good
4575 * chance that our ro pointer is now filled
4577 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4578 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4581 /* Copy to be sure something bad is not happening */
4582 sin6->sin6_addr = ip6h->ip6_dst;
4583 lsa6->sin6_addr = ip6h->ip6_src;
4586 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4587 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4588 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4589 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4590 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4592 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4594 * preserve the port and scope for link
4597 prev_scope = sin6->sin6_scope_id;
4598 prev_port = sin6->sin6_port;
4600 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4601 /* failed to prepend data, give up */
4603 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4606 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4608 #if defined(SCTP_WITH_NO_CSUM)
4609 SCTP_STAT_INCR(sctps_sendnocrc);
4611 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4612 SCTP_STAT_INCR(sctps_sendswcrc);
4614 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4615 udp->uh_sum = 0xffff;
4618 #if defined(SCTP_WITH_NO_CSUM)
4619 SCTP_STAT_INCR(sctps_sendnocrc);
4621 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4622 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4623 SCTP_STAT_INCR(sctps_sendhwcrc);
4626 /* send it out. table id is taken from stcb */
4627 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4628 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4629 so = SCTP_INP_SO(inp);
4630 SCTP_SOCKET_UNLOCK(so, 0);
4633 #ifdef SCTP_PACKET_LOGGING
4634 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4635 sctp_packet_log(o_pak);
4637 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4638 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4639 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4640 atomic_add_int(&stcb->asoc.refcnt, 1);
4641 SCTP_TCB_UNLOCK(stcb);
4642 SCTP_SOCKET_LOCK(so, 0);
4643 SCTP_TCB_LOCK(stcb);
4644 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4648 /* for link local this must be done */
4649 sin6->sin6_scope_id = prev_scope;
4650 sin6->sin6_port = prev_port;
4652 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4653 SCTP_STAT_INCR(sctps_sendpackets);
4654 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4656 SCTP_STAT_INCR(sctps_senderrors);
4659 /* Now if we had a temp route free it */
4663 * PMTU check versus smallest asoc MTU goes
4666 if (ro->ro_rt == NULL) {
4667 /* Route was freed */
4668 if (net->ro._s_addr &&
4669 net->src_addr_selected) {
4670 sctp_free_ifa(net->ro._s_addr);
4671 net->ro._s_addr = NULL;
4673 net->src_addr_selected = 0;
4675 if ((ro->ro_rt != NULL) &&
4676 (net->ro._s_addr)) {
4679 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4681 (stcb->asoc.smallest_mtu > mtu)) {
4682 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4685 net->mtu -= sizeof(struct udphdr);
4689 if (ND_IFINFO(ifp)->linkmtu &&
4690 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4691 sctp_mtu_size_reset(inp,
4693 ND_IFINFO(ifp)->linkmtu);
4701 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4702 ((struct sockaddr *)to)->sa_family);
4704 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4711 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4712 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4717 struct mbuf *m, *m_last;
4718 struct sctp_nets *net;
4719 struct sctp_init_chunk *init;
4720 struct sctp_supported_addr_param *sup_addr;
4721 struct sctp_adaptation_layer_indication *ali;
4722 struct sctp_supported_chunk_types_param *pr_supported;
4723 struct sctp_paramhdr *ph;
4724 int cnt_inits_to = 0;
4726 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4728 /* INIT's always go to the primary (and usually ONLY address) */
4729 net = stcb->asoc.primary_destination;
4731 net = TAILQ_FIRST(&stcb->asoc.nets);
4736 /* we confirm any address we send an INIT to */
4737 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4738 (void)sctp_set_primary_addr(stcb, NULL, net);
4740 /* we confirm any address we send an INIT to */
4741 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4743 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4745 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4747 * special hook, if we are sending to link local it will not
4748 * show up in our private address count.
4750 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4754 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4755 /* This case should not happen */
4756 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4759 /* start the INIT timer */
4760 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4762 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4764 /* No memory, INIT timer will re-attempt. */
4765 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4768 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4770 /* Now lets put the chunk header in place */
4771 init = mtod(m, struct sctp_init_chunk *);
4772 /* now the chunk header */
4773 init->ch.chunk_type = SCTP_INITIATION;
4774 init->ch.chunk_flags = 0;
4775 /* fill in later from mbuf we build */
4776 init->ch.chunk_length = 0;
4777 /* place in my tag */
4778 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4779 /* set up some of the credits. */
4780 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4781 SCTP_MINIMAL_RWND));
4782 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4783 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4784 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4786 /* Adaptation layer indication parameter */
4787 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4788 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4789 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4790 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4791 ali->ph.param_length = htons(parameter_len);
4792 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4793 chunk_len += parameter_len;
4796 if (stcb->asoc.ecn_supported == 1) {
4797 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4798 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4799 ph->param_type = htons(SCTP_ECN_CAPABLE);
4800 ph->param_length = htons(parameter_len);
4801 chunk_len += parameter_len;
4803 /* PR-SCTP supported parameter */
4804 if (stcb->asoc.prsctp_supported == 1) {
4805 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4806 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4807 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4808 ph->param_length = htons(parameter_len);
4809 chunk_len += parameter_len;
4811 /* Add NAT friendly parameter. */
4812 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4813 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4814 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4815 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4816 ph->param_length = htons(parameter_len);
4817 chunk_len += parameter_len;
4819 /* And now tell the peer which extensions we support */
4821 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4822 if (stcb->asoc.prsctp_supported == 1) {
4823 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4825 if (stcb->asoc.auth_supported == 1) {
4826 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4828 if (stcb->asoc.asconf_supported == 1) {
4829 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4830 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4832 if (stcb->asoc.reconfig_supported == 1) {
4833 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4835 if (stcb->asoc.nrsack_supported == 1) {
4836 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4838 if (stcb->asoc.pktdrop_supported == 1) {
4839 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4842 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4843 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4844 pr_supported->ph.param_length = htons(parameter_len);
4845 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4846 chunk_len += parameter_len;
4848 /* add authentication parameters */
4849 if (stcb->asoc.auth_supported) {
4850 /* attach RANDOM parameter, if available */
4851 if (stcb->asoc.authinfo.random != NULL) {
4852 struct sctp_auth_random *randp;
4854 if (padding_len > 0) {
4855 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4856 chunk_len += padding_len;
4859 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4860 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4861 /* random key already contains the header */
4862 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4863 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4864 chunk_len += parameter_len;
4866 /* add HMAC_ALGO parameter */
4867 if (stcb->asoc.local_hmacs != NULL) {
4868 struct sctp_auth_hmac_algo *hmacs;
4870 if (padding_len > 0) {
4871 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4872 chunk_len += padding_len;
4875 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4876 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4877 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4878 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4879 hmacs->ph.param_length = htons(parameter_len);
4880 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4881 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4882 chunk_len += parameter_len;
4884 /* add CHUNKS parameter */
4885 if (stcb->asoc.local_auth_chunks != NULL) {
4886 struct sctp_auth_chunk_list *chunks;
4888 if (padding_len > 0) {
4889 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4890 chunk_len += padding_len;
4893 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4894 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4895 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4896 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4897 chunks->ph.param_length = htons(parameter_len);
4898 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4899 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4900 chunk_len += parameter_len;
4903 /* now any cookie time extensions */
4904 if (stcb->asoc.cookie_preserve_req) {
4905 struct sctp_cookie_perserve_param *cookie_preserve;
4907 if (padding_len > 0) {
4908 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4909 chunk_len += padding_len;
4912 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4913 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4914 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4915 cookie_preserve->ph.param_length = htons(parameter_len);
4916 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4917 stcb->asoc.cookie_preserve_req = 0;
4918 chunk_len += parameter_len;
4920 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4923 if (padding_len > 0) {
4924 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4925 chunk_len += padding_len;
4928 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4929 if (stcb->asoc.scope.ipv4_addr_legal) {
4930 parameter_len += (uint16_t) sizeof(uint16_t);
4932 if (stcb->asoc.scope.ipv6_addr_legal) {
4933 parameter_len += (uint16_t) sizeof(uint16_t);
4935 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4936 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4937 sup_addr->ph.param_length = htons(parameter_len);
4939 if (stcb->asoc.scope.ipv4_addr_legal) {
4940 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4942 if (stcb->asoc.scope.ipv6_addr_legal) {
4943 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4945 padding_len = 4 - 2 * i;
4946 chunk_len += parameter_len;
4948 SCTP_BUF_LEN(m) = chunk_len;
4949 /* now the addresses */
4951 * To optimize this we could put the scoping stuff into a structure
4952 * and remove the individual uint8's from the assoc structure. Then
4953 * we could just sifa in the address within the stcb. But for now
4954 * this is a quick hack to get the address stuff teased apart.
4956 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4958 &padding_len, &chunk_len);
4960 init->ch.chunk_length = htons(chunk_len);
4961 if (padding_len > 0) {
4962 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4967 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4968 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4969 (struct sockaddr *)&net->ro._l_addr,
4970 m, 0, NULL, 0, 0, 0, 0,
4971 inp->sctp_lport, stcb->rport, htonl(0),
4975 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4976 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4977 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4981 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4982 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4985 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4986 * being equal to the beginning of the params i.e. (iphlen +
4987 * sizeof(struct sctp_init_msg) parse through the parameters to the
4988 * end of the mbuf verifying that all parameters are known.
4990 * For unknown parameters build and return a mbuf with
4991 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4992 * processing this chunk stop, and set *abort_processing to 1.
4994 * By having param_offset be pre-set to where parameters begin it is
4995 * hoped that this routine may be reused in the future by new
4998 struct sctp_paramhdr *phdr, params;
5000 struct mbuf *mat, *op_err;
5001 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
5002 int at, limit, pad_needed;
5003 uint16_t ptype, plen, padded_size;
5006 *abort_processing = 0;
5009 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
5012 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
5013 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5014 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
5015 ptype = ntohs(phdr->param_type);
5016 plen = ntohs(phdr->param_length);
5017 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
5018 /* wacked parameter */
5019 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
5022 limit -= SCTP_SIZE32(plen);
5024 * All parameters for all chunks that we know/understand are
5025 * listed here. We process them other places and make
5026 * appropriate stop actions per the upper bits. However this
5027 * is the generic routine processor's can call to get back
5028 * an operr.. to either incorporate (init-ack) or send.
5030 padded_size = SCTP_SIZE32(plen);
5032 /* Param's with variable size */
5033 case SCTP_HEARTBEAT_INFO:
5034 case SCTP_STATE_COOKIE:
5035 case SCTP_UNRECOG_PARAM:
5036 case SCTP_ERROR_CAUSE_IND:
5040 /* Param's with variable size within a range */
5041 case SCTP_CHUNK_LIST:
5042 case SCTP_SUPPORTED_CHUNK_EXT:
5043 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5044 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5049 case SCTP_SUPPORTED_ADDRTYPE:
5050 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5057 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5063 case SCTP_SET_PRIM_ADDR:
5064 case SCTP_DEL_IP_ADDRESS:
5065 case SCTP_ADD_IP_ADDRESS:
5066 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5067 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5068 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5073 /* Param's with a fixed size */
5074 case SCTP_IPV4_ADDRESS:
5075 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5076 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5081 case SCTP_IPV6_ADDRESS:
5082 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5083 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5088 case SCTP_COOKIE_PRESERVE:
5089 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5090 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5095 case SCTP_HAS_NAT_SUPPORT:
5098 case SCTP_PRSCTP_SUPPORTED:
5099 if (padded_size != sizeof(struct sctp_paramhdr)) {
5100 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5105 case SCTP_ECN_CAPABLE:
5106 if (padded_size != sizeof(struct sctp_paramhdr)) {
5107 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5112 case SCTP_ULP_ADAPTATION:
5113 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5114 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5119 case SCTP_SUCCESS_REPORT:
5120 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5121 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5126 case SCTP_HOSTNAME_ADDRESS:
5128 /* We can NOT handle HOST NAME addresses!! */
5131 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5132 *abort_processing = 1;
5133 if (op_err == NULL) {
5134 /* Ok need to try to get a mbuf */
5136 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5138 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5141 l_len += sizeof(struct sctp_paramhdr);
5142 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5144 SCTP_BUF_LEN(op_err) = 0;
5146 * pre-reserve space for ip
5147 * and sctp header and
5151 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5153 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5155 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5156 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5160 /* If we have space */
5161 struct sctp_paramhdr s;
5164 uint32_t cpthis = 0;
5166 pad_needed = 4 - (err_at % 4);
5167 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5168 err_at += pad_needed;
5170 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5171 s.param_length = htons(sizeof(s) + plen);
5172 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5173 err_at += sizeof(s);
5174 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5176 sctp_m_freem(op_err);
5178 * we are out of memory but
5179 * we still need to have a
5180 * look at what to do (the
5181 * system is in trouble
5186 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5193 * we do not recognize the parameter figure out what
5196 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5197 if ((ptype & 0x4000) == 0x4000) {
5198 /* Report bit is set?? */
5199 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5200 if (op_err == NULL) {
5203 /* Ok need to try to get an mbuf */
5205 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5207 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5210 l_len += sizeof(struct sctp_paramhdr);
5211 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5213 SCTP_BUF_LEN(op_err) = 0;
5215 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5217 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5219 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5220 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5224 /* If we have space */
5225 struct sctp_paramhdr s;
5228 uint32_t cpthis = 0;
5230 pad_needed = 4 - (err_at % 4);
5231 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5232 err_at += pad_needed;
5234 s.param_type = htons(SCTP_UNRECOG_PARAM);
5235 s.param_length = htons(sizeof(s) + plen);
5236 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5237 err_at += sizeof(s);
5238 if (plen > sizeof(tempbuf)) {
5239 plen = sizeof(tempbuf);
5241 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5243 sctp_m_freem(op_err);
5245 * we are out of memory but
5246 * we still need to have a
5247 * look at what to do (the
5248 * system is in trouble
5252 goto more_processing;
5254 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5259 if ((ptype & 0x8000) == 0x0000) {
5260 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5263 /* skip this chunk and continue processing */
5264 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5265 at += SCTP_SIZE32(plen);
5270 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5274 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5275 *abort_processing = 1;
5276 if ((op_err == NULL) && phdr) {
5280 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5282 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5284 l_len += (2 * sizeof(struct sctp_paramhdr));
5285 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5287 SCTP_BUF_LEN(op_err) = 0;
5289 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5291 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5293 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5294 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5297 if ((op_err) && phdr) {
5298 struct sctp_paramhdr s;
5301 uint32_t cpthis = 0;
5303 pad_needed = 4 - (err_at % 4);
5304 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5305 err_at += pad_needed;
5307 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5308 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5309 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5310 err_at += sizeof(s);
5311 /* Only copy back the p-hdr that caused the issue */
5312 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5318 sctp_are_there_new_addresses(struct sctp_association *asoc,
5319 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5322 * Given a INIT packet, look through the packet to verify that there
5323 * are NO new addresses. As we go through the parameters add reports
5324 * of any un-understood parameters that require an error. Also we
5325 * must return (1) to drop the packet if we see a un-understood
5326 * parameter that tells us to drop the chunk.
5328 struct sockaddr *sa_touse;
5329 struct sockaddr *sa;
5330 struct sctp_paramhdr *phdr, params;
5331 uint16_t ptype, plen;
5333 struct sctp_nets *net;
5336 struct sockaddr_in sin4, *sa4;
5340 struct sockaddr_in6 sin6, *sa6;
5345 memset(&sin4, 0, sizeof(sin4));
5346 sin4.sin_family = AF_INET;
5347 sin4.sin_len = sizeof(sin4);
5350 memset(&sin6, 0, sizeof(sin6));
5351 sin6.sin6_family = AF_INET6;
5352 sin6.sin6_len = sizeof(sin6);
5354 /* First what about the src address of the pkt ? */
5356 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5357 sa = (struct sockaddr *)&net->ro._l_addr;
5358 if (sa->sa_family == src->sa_family) {
5360 if (sa->sa_family == AF_INET) {
5361 struct sockaddr_in *src4;
5363 sa4 = (struct sockaddr_in *)sa;
5364 src4 = (struct sockaddr_in *)src;
5365 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5372 if (sa->sa_family == AF_INET6) {
5373 struct sockaddr_in6 *src6;
5375 sa6 = (struct sockaddr_in6 *)sa;
5376 src6 = (struct sockaddr_in6 *)src;
5377 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5386 /* New address added! no need to look futher. */
5389 /* Ok so far lets munge through the rest of the packet */
5390 offset += sizeof(struct sctp_init_chunk);
5391 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5394 ptype = ntohs(phdr->param_type);
5395 plen = ntohs(phdr->param_length);
5398 case SCTP_IPV4_ADDRESS:
5400 struct sctp_ipv4addr_param *p4, p4_buf;
5402 phdr = sctp_get_next_param(in_initpkt, offset,
5403 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5404 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5408 p4 = (struct sctp_ipv4addr_param *)phdr;
5409 sin4.sin_addr.s_addr = p4->addr;
5410 sa_touse = (struct sockaddr *)&sin4;
5415 case SCTP_IPV6_ADDRESS:
5417 struct sctp_ipv6addr_param *p6, p6_buf;
5419 phdr = sctp_get_next_param(in_initpkt, offset,
5420 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5421 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5425 p6 = (struct sctp_ipv6addr_param *)phdr;
5426 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5428 sa_touse = (struct sockaddr *)&sin6;
5437 /* ok, sa_touse points to one to check */
5439 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5440 sa = (struct sockaddr *)&net->ro._l_addr;
5441 if (sa->sa_family != sa_touse->sa_family) {
5445 if (sa->sa_family == AF_INET) {
5446 sa4 = (struct sockaddr_in *)sa;
5447 if (sa4->sin_addr.s_addr ==
5448 sin4.sin_addr.s_addr) {
5455 if (sa->sa_family == AF_INET6) {
5456 sa6 = (struct sockaddr_in6 *)sa;
5457 if (SCTP6_ARE_ADDR_EQUAL(
5466 /* New addr added! no need to look further */
5470 offset += SCTP_SIZE32(plen);
5471 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5477 * Given a MBUF chain that was sent into us containing an INIT. Build a
5478 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5479 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5480 * message (i.e. the struct sctp_init_msg).
5483 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5484 struct mbuf *init_pkt, int iphlen, int offset,
5485 struct sockaddr *src, struct sockaddr *dst,
5486 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5487 uint8_t use_mflowid, uint32_t mflowid,
5488 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5490 struct sctp_association *asoc;
5491 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5492 struct sctp_init_ack_chunk *initack;
5493 struct sctp_adaptation_layer_indication *ali;
5494 struct sctp_supported_chunk_types_param *pr_supported;
5495 struct sctp_paramhdr *ph;
5496 union sctp_sockstore *over_addr;
5497 struct sctp_scoping scp;
5500 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5501 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5502 struct sockaddr_in *sin;
5506 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5507 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5508 struct sockaddr_in6 *sin6;
5511 struct sockaddr *to;
5512 struct sctp_state_cookie stc;
5513 struct sctp_nets *net = NULL;
5514 uint8_t *signature = NULL;
5515 int cnt_inits_to = 0;
5516 uint16_t his_limit, i_want;
5518 int nat_friendly = 0;
5520 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5527 if ((asoc != NULL) &&
5528 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5529 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5530 /* new addresses, out of here in non-cookie-wait states */
5532 * Send a ABORT, we don't add the new address error clause
5533 * though we even set the T bit and copy in the 0 tag.. this
5534 * looks no different than if no listener was present.
5536 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5538 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5539 use_mflowid, mflowid,
5544 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5545 (offset + sizeof(struct sctp_init_chunk)),
5546 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5549 if (op_err == NULL) {
5550 char msg[SCTP_DIAG_INFO_LEN];
5552 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5553 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5556 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5557 init_chk->init.initiate_tag, op_err,
5558 use_mflowid, mflowid,
5562 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5564 /* No memory, INIT timer will re-attempt. */
5566 sctp_m_freem(op_err);
5569 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5573 * We might not overwrite the identification[] completely and on
5574 * some platforms time_entered will contain some padding. Therefore
5575 * zero out the cookie to avoid putting uninitialized memory on the
5578 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5580 /* the time I built cookie */
5581 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5583 /* populate any tie tags */
5585 /* unlock before tag selections */
5586 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5587 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5588 stc.cookie_life = asoc->cookie_life;
5589 net = asoc->primary_destination;
5591 stc.tie_tag_my_vtag = 0;
5592 stc.tie_tag_peer_vtag = 0;
5593 /* life I will award this cookie */
5594 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5597 /* copy in the ports for later check */
5598 stc.myport = sh->dest_port;
5599 stc.peerport = sh->src_port;
5602 * If we wanted to honor cookie life extentions, we would add to
5603 * stc.cookie_life. For now we should NOT honor any extension
5605 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5606 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5607 stc.ipv6_addr_legal = 1;
5608 if (SCTP_IPV6_V6ONLY(inp)) {
5609 stc.ipv4_addr_legal = 0;
5611 stc.ipv4_addr_legal = 1;
5614 stc.ipv6_addr_legal = 0;
5615 stc.ipv4_addr_legal = 1;
5617 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5624 switch (dst->sa_family) {
5628 /* lookup address */
5629 stc.address[0] = src4->sin_addr.s_addr;
5633 stc.addr_type = SCTP_IPV4_ADDRESS;
5634 /* local from address */
5635 stc.laddress[0] = dst4->sin_addr.s_addr;
5636 stc.laddress[1] = 0;
5637 stc.laddress[2] = 0;
5638 stc.laddress[3] = 0;
5639 stc.laddr_type = SCTP_IPV4_ADDRESS;
5640 /* scope_id is only for v6 */
5642 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5643 if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
5648 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5649 /* Must use the address in this case */
5650 if (sctp_is_address_on_local_host(src, vrf_id)) {
5651 stc.loopback_scope = 1;
5654 stc.local_scope = 0;
5662 stc.addr_type = SCTP_IPV6_ADDRESS;
5663 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5664 stc.scope_id = in6_getscope(&src6->sin6_addr);
5665 if (sctp_is_address_on_local_host(src, vrf_id)) {
5666 stc.loopback_scope = 1;
5667 stc.local_scope = 0;
5670 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
5672 * If the new destination is a
5673 * LINK_LOCAL we must have common
5674 * both site and local scope. Don't
5675 * set local scope though since we
5676 * must depend on the source to be
5677 * added implicitly. We cannot
5678 * assure just because we share one
5679 * link that all links are common.
5681 stc.local_scope = 0;
5685 * we start counting for the private
5686 * address stuff at 1. since the
5687 * link local we source from won't
5688 * show up in our scoped count.
5692 * pull out the scope_id from
5695 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
5697 * If the new destination is
5698 * SITE_LOCAL then we must have site
5703 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5704 stc.laddr_type = SCTP_IPV6_ADDRESS;
5714 /* set the scope per the existing tcb */
5717 struct sctp_nets *lnet;
5721 stc.loopback_scope = asoc->scope.loopback_scope;
5722 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5723 stc.site_scope = asoc->scope.site_scope;
5724 stc.local_scope = asoc->scope.local_scope;
5726 /* Why do we not consider IPv4 LL addresses? */
5727 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5728 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5729 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5731 * if we have a LL address, start
5739 /* use the net pointer */
5740 to = (struct sockaddr *)&net->ro._l_addr;
5741 switch (to->sa_family) {
5744 sin = (struct sockaddr_in *)to;
5745 stc.address[0] = sin->sin_addr.s_addr;
5749 stc.addr_type = SCTP_IPV4_ADDRESS;
5750 if (net->src_addr_selected == 0) {
5752 * strange case here, the INIT should have
5753 * did the selection.
5755 net->ro._s_addr = sctp_source_address_selection(inp,
5756 stcb, (sctp_route_t *) & net->ro,
5758 if (net->ro._s_addr == NULL)
5761 net->src_addr_selected = 1;
5764 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5765 stc.laddress[1] = 0;
5766 stc.laddress[2] = 0;
5767 stc.laddress[3] = 0;
5768 stc.laddr_type = SCTP_IPV4_ADDRESS;
5769 /* scope_id is only for v6 */
5775 sin6 = (struct sockaddr_in6 *)to;
5776 memcpy(&stc.address, &sin6->sin6_addr,
5777 sizeof(struct in6_addr));
5778 stc.addr_type = SCTP_IPV6_ADDRESS;
5779 stc.scope_id = sin6->sin6_scope_id;
5780 if (net->src_addr_selected == 0) {
5782 * strange case here, the INIT should have
5783 * done the selection.
5785 net->ro._s_addr = sctp_source_address_selection(inp,
5786 stcb, (sctp_route_t *) & net->ro,
5788 if (net->ro._s_addr == NULL)
5791 net->src_addr_selected = 1;
5793 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5794 sizeof(struct in6_addr));
5795 stc.laddr_type = SCTP_IPV6_ADDRESS;
5800 /* Now lets put the SCTP header in place */
5801 initack = mtod(m, struct sctp_init_ack_chunk *);
5802 /* Save it off for quick ref */
5803 stc.peers_vtag = init_chk->init.initiate_tag;
5805 memcpy(stc.identification, SCTP_VERSION_STRING,
5806 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5807 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5808 /* now the chunk header */
5809 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5810 initack->ch.chunk_flags = 0;
5811 /* fill in later from mbuf we build */
5812 initack->ch.chunk_length = 0;
5813 /* place in my tag */
5814 if ((asoc != NULL) &&
5815 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5816 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5817 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5818 /* re-use the v-tags and init-seq here */
5819 initack->init.initiate_tag = htonl(asoc->my_vtag);
5820 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5822 uint32_t vtag, itsn;
5824 if (hold_inp_lock) {
5825 SCTP_INP_INCR_REF(inp);
5826 SCTP_INP_RUNLOCK(inp);
5829 atomic_add_int(&asoc->refcnt, 1);
5830 SCTP_TCB_UNLOCK(stcb);
5832 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5833 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5835 * Got a duplicate vtag on some guy behind a
5836 * nat make sure we don't use it.
5840 initack->init.initiate_tag = htonl(vtag);
5841 /* get a TSN to use too */
5842 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5843 initack->init.initial_tsn = htonl(itsn);
5844 SCTP_TCB_LOCK(stcb);
5845 atomic_add_int(&asoc->refcnt, -1);
5847 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5848 initack->init.initiate_tag = htonl(vtag);
5849 /* get a TSN to use too */
5850 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5852 if (hold_inp_lock) {
5853 SCTP_INP_RLOCK(inp);
5854 SCTP_INP_DECR_REF(inp);
5857 /* save away my tag to */
5858 stc.my_vtag = initack->init.initiate_tag;
5860 /* set up some of the credits. */
5861 so = inp->sctp_socket;
5863 /* memory problem */
5867 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5869 /* set what I want */
5870 his_limit = ntohs(init_chk->init.num_inbound_streams);
5871 /* choose what I want */
5873 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5874 i_want = asoc->streamoutcnt;
5876 i_want = inp->sctp_ep.pre_open_stream_count;
5879 i_want = inp->sctp_ep.pre_open_stream_count;
5881 if (his_limit < i_want) {
5882 /* I Want more :< */
5883 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5885 /* I can have what I want :> */
5886 initack->init.num_outbound_streams = htons(i_want);
5888 /* tell him his limit. */
5889 initack->init.num_inbound_streams =
5890 htons(inp->sctp_ep.max_open_streams_intome);
5892 /* adaptation layer indication parameter */
5893 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5894 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5895 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5896 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5897 ali->ph.param_length = htons(parameter_len);
5898 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5899 chunk_len += parameter_len;
5902 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5903 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5904 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5905 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5906 ph->param_type = htons(SCTP_ECN_CAPABLE);
5907 ph->param_length = htons(parameter_len);
5908 chunk_len += parameter_len;
5910 /* PR-SCTP supported parameter */
5911 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5912 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5913 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5914 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5915 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5916 ph->param_length = htons(parameter_len);
5917 chunk_len += parameter_len;
5919 /* Add NAT friendly parameter */
5921 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5922 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5923 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5924 ph->param_length = htons(parameter_len);
5925 chunk_len += parameter_len;
5927 /* And now tell the peer which extensions we support */
5929 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5930 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5931 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5932 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5934 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5935 ((asoc == NULL) && (inp->auth_supported == 1))) {
5936 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5938 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5939 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5940 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5941 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5943 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5944 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5945 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5947 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5948 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5949 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5951 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5952 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5953 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5956 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5957 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5958 pr_supported->ph.param_length = htons(parameter_len);
5959 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5960 chunk_len += parameter_len;
5962 /* add authentication parameters */
5963 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5964 ((asoc == NULL) && (inp->auth_supported == 1))) {
5965 struct sctp_auth_random *randp;
5966 struct sctp_auth_hmac_algo *hmacs;
5967 struct sctp_auth_chunk_list *chunks;
5969 if (padding_len > 0) {
5970 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5971 chunk_len += padding_len;
5974 /* generate and add RANDOM parameter */
5975 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5976 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5977 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5978 randp->ph.param_type = htons(SCTP_RANDOM);
5979 randp->ph.param_length = htons(parameter_len);
5980 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5981 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5982 chunk_len += parameter_len;
5984 if (padding_len > 0) {
5985 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5986 chunk_len += padding_len;
5989 /* add HMAC_ALGO parameter */
5990 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5991 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
5992 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5993 (uint8_t *) hmacs->hmac_ids);
5994 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5995 hmacs->ph.param_length = htons(parameter_len);
5996 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5997 chunk_len += parameter_len;
5999 if (padding_len > 0) {
6000 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6001 chunk_len += padding_len;
6004 /* add CHUNKS parameter */
6005 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6006 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6007 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6008 chunks->chunk_types);
6009 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6010 chunks->ph.param_length = htons(parameter_len);
6011 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6012 chunk_len += parameter_len;
6014 SCTP_BUF_LEN(m) = chunk_len;
6016 /* now the addresses */
6018 * To optimize this we could put the scoping stuff into a structure
6019 * and remove the individual uint8's from the stc structure. Then we
6020 * could just sifa in the address within the stc.. but for now this
6021 * is a quick hack to get the address stuff teased apart.
6023 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6024 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6025 scp.loopback_scope = stc.loopback_scope;
6026 scp.ipv4_local_scope = stc.ipv4_scope;
6027 scp.local_scope = stc.local_scope;
6028 scp.site_scope = stc.site_scope;
6029 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6031 &padding_len, &chunk_len);
6032 /* padding_len can only be positive, if no addresses have been added */
6033 if (padding_len > 0) {
6034 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6035 chunk_len += padding_len;
6036 SCTP_BUF_LEN(m) += padding_len;
6039 /* tack on the operational error if present */
6042 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6043 parameter_len += SCTP_BUF_LEN(m_tmp);
6045 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6046 SCTP_BUF_NEXT(m_last) = op_err;
6047 while (SCTP_BUF_NEXT(m_last) != NULL) {
6048 m_last = SCTP_BUF_NEXT(m_last);
6050 chunk_len += parameter_len;
6052 if (padding_len > 0) {
6053 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6054 if (m_last == NULL) {
6055 /* Houston we have a problem, no space */
6059 chunk_len += padding_len;
6062 /* Now we must build a cookie */
6063 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6064 if (m_cookie == NULL) {
6065 /* memory problem */
6069 /* Now append the cookie to the end and update the space/size */
6070 SCTP_BUF_NEXT(m_last) = m_cookie;
6072 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6073 parameter_len += SCTP_BUF_LEN(m_tmp);
6074 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6078 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6079 chunk_len += parameter_len;
6082 * Place in the size, but we don't include the last pad (if any) in
6085 initack->ch.chunk_length = htons(chunk_len);
6088 * Time to sign the cookie, we don't sign over the cookie signature
6089 * though thus we set trailer.
6091 (void)sctp_hmac_m(SCTP_HMAC,
6092 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6093 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6094 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6096 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6097 * here since the timer will drive a retranmission.
6099 if (padding_len > 0) {
6100 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6105 if (stc.loopback_scope) {
6106 over_addr = (union sctp_sockstore *)dst;
6111 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6113 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6115 use_mflowid, mflowid,
6116 SCTP_SO_NOT_LOCKED);
6117 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6122 sctp_prune_prsctp(struct sctp_tcb *stcb,
6123 struct sctp_association *asoc,
6124 struct sctp_sndrcvinfo *srcv,
6128 struct sctp_tmit_chunk *chk, *nchk;
6130 SCTP_TCB_LOCK_ASSERT(stcb);
6131 if ((asoc->prsctp_supported) &&
6132 (asoc->sent_queue_cnt_removeable > 0)) {
6133 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6135 * Look for chunks marked with the PR_SCTP flag AND
6136 * the buffer space flag. If the one being sent is
6137 * equal or greater priority then purge the old one
6138 * and free some space.
6140 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6142 * This one is PR-SCTP AND buffer space
6145 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6147 * Lower numbers equates to higher
6148 * priority so if the one we are
6149 * looking at has a larger or equal
6150 * priority we want to drop the data
6151 * and NOT retransmit it.
6155 * We release the book_size
6156 * if the mbuf is here
6161 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6165 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6168 freed_spc += ret_spc;
6169 if (freed_spc >= dataout) {
6172 } /* if chunk was present */
6173 } /* if of sufficent priority */
6174 } /* if chunk has enabled */
6175 } /* tailqforeach */
6177 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6178 /* Here we must move to the sent queue and mark */
6179 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6180 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6183 * We release the book_size
6184 * if the mbuf is here
6188 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6191 freed_spc += ret_spc;
6192 if (freed_spc >= dataout) {
6195 } /* end if chk->data */
6196 } /* end if right class */
6197 } /* end if chk pr-sctp */
6198 } /* tailqforeachsafe (chk) */
6199 } /* if enabled in asoc */
6203 sctp_get_frag_point(struct sctp_tcb *stcb,
6204 struct sctp_association *asoc)
6209 * For endpoints that have both v6 and v4 addresses we must reserve
6210 * room for the ipv6 header, for those that are only dealing with V4
6211 * we use a larger frag point.
6213 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6214 ovh = SCTP_MED_OVERHEAD;
6216 ovh = SCTP_MED_V4_OVERHEAD;
6219 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6220 siz = asoc->smallest_mtu - ovh;
6222 siz = (stcb->asoc.sctp_frag_point - ovh);
6224 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6226 /* A data chunk MUST fit in a cluster */
6227 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6230 /* adjust for an AUTH chunk if DATA requires auth */
6231 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6232 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6235 /* make it an even word boundary please */
6242 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6245 * We assume that the user wants PR_SCTP_TTL if the user provides a
6246 * positive lifetime but does not specify any PR_SCTP policy.
6248 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6249 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6250 } else if (sp->timetolive > 0) {
6251 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6252 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6256 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6257 case CHUNK_FLAGS_PR_SCTP_BUF:
6259 * Time to live is a priority stored in tv_sec when doing
6260 * the buffer drop thing.
6262 sp->ts.tv_sec = sp->timetolive;
6265 case CHUNK_FLAGS_PR_SCTP_TTL:
6269 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6270 tv.tv_sec = sp->timetolive / 1000;
6271 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6273 * TODO sctp_constants.h needs alternative time
6274 * macros when _KERNEL is undefined.
6276 timevaladd(&sp->ts, &tv);
6279 case CHUNK_FLAGS_PR_SCTP_RTX:
6281 * Time to live is a the number or retransmissions stored in
6284 sp->ts.tv_sec = sp->timetolive;
6288 SCTPDBG(SCTP_DEBUG_USRREQ1,
6289 "Unknown PR_SCTP policy %u.\n",
6290 PR_SCTP_POLICY(sp->sinfo_flags));
6296 sctp_msg_append(struct sctp_tcb *stcb,
6297 struct sctp_nets *net,
6299 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6303 struct sctp_stream_queue_pending *sp = NULL;
6304 struct sctp_stream_out *strm;
6307 * Given an mbuf chain, put it into the association send queue and
6308 * place it on the wheel
6310 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6311 /* Invalid stream number */
6312 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6316 if ((stcb->asoc.stream_locked) &&
6317 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6318 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6322 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6323 /* Now can we send this? */
6324 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6325 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6326 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6327 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6328 /* got data while shutting down */
6329 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6333 sctp_alloc_a_strmoq(stcb, sp);
6335 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6339 sp->sinfo_flags = srcv->sinfo_flags;
6340 sp->timetolive = srcv->sinfo_timetolive;
6341 sp->ppid = srcv->sinfo_ppid;
6342 sp->context = srcv->sinfo_context;
6343 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6345 atomic_add_int(&sp->net->ref_count, 1);
6349 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6350 sp->stream = srcv->sinfo_stream;
6351 sp->msg_is_complete = 1;
6352 sp->sender_all_done = 1;
6355 sp->tail_mbuf = NULL;
6356 sctp_set_prsctp_policy(sp);
6358 * We could in theory (for sendall) sifa the length in, but we would
6359 * still have to hunt through the chain since we need to setup the
6363 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6364 if (SCTP_BUF_NEXT(at) == NULL)
6366 sp->length += SCTP_BUF_LEN(at);
6368 if (srcv->sinfo_keynumber_valid) {
6369 sp->auth_keyid = srcv->sinfo_keynumber;
6371 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6373 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6374 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6375 sp->holds_key_ref = 1;
6377 if (hold_stcb_lock == 0) {
6378 SCTP_TCB_SEND_LOCK(stcb);
6380 sctp_snd_sb_alloc(stcb, sp->length);
6381 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6382 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6383 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6385 if (hold_stcb_lock == 0) {
6386 SCTP_TCB_SEND_UNLOCK(stcb);
6396 static struct mbuf *
6397 sctp_copy_mbufchain(struct mbuf *clonechain,
6398 struct mbuf *outchain,
6399 struct mbuf **endofchain,
6402 uint8_t copy_by_ref)
6405 struct mbuf *appendchain;
6409 if (endofchain == NULL) {
6413 sctp_m_freem(outchain);
6416 if (can_take_mbuf) {
6417 appendchain = clonechain;
6420 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6422 /* Its not in a cluster */
6423 if (*endofchain == NULL) {
6424 /* lets get a mbuf cluster */
6425 if (outchain == NULL) {
6426 /* This is the general case */
6428 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6429 if (outchain == NULL) {
6432 SCTP_BUF_LEN(outchain) = 0;
6433 *endofchain = outchain;
6434 /* get the prepend space */
6435 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6438 * We really should not get a NULL
6444 if (SCTP_BUF_NEXT(m) == NULL) {
6448 m = SCTP_BUF_NEXT(m);
6451 if (*endofchain == NULL) {
6453 * huh, TSNH XXX maybe we
6456 sctp_m_freem(outchain);
6460 /* get the new end of length */
6461 len = M_TRAILINGSPACE(*endofchain);
6463 /* how much is left at the end? */
6464 len = M_TRAILINGSPACE(*endofchain);
6466 /* Find the end of the data, for appending */
6467 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6469 /* Now lets copy it out */
6470 if (len >= sizeofcpy) {
6471 /* It all fits, copy it in */
6472 m_copydata(clonechain, 0, sizeofcpy, cp);
6473 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6475 /* fill up the end of the chain */
6477 m_copydata(clonechain, 0, len, cp);
6478 SCTP_BUF_LEN((*endofchain)) += len;
6479 /* now we need another one */
6482 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6487 SCTP_BUF_NEXT((*endofchain)) = m;
6489 cp = mtod((*endofchain), caddr_t);
6490 m_copydata(clonechain, len, sizeofcpy, cp);
6491 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6495 /* copy the old fashion way */
6496 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6497 #ifdef SCTP_MBUF_LOGGING
6498 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6501 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6502 if (SCTP_BUF_IS_EXTENDED(mat)) {
6503 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6510 if (appendchain == NULL) {
6513 sctp_m_freem(outchain);
6517 /* tack on to the end */
6518 if (*endofchain != NULL) {
6519 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6523 if (SCTP_BUF_NEXT(m) == NULL) {
6524 SCTP_BUF_NEXT(m) = appendchain;
6527 m = SCTP_BUF_NEXT(m);
6531 * save off the end and update the end-chain postion
6535 if (SCTP_BUF_NEXT(m) == NULL) {
6539 m = SCTP_BUF_NEXT(m);
6543 /* save off the end and update the end-chain postion */
6546 if (SCTP_BUF_NEXT(m) == NULL) {
6550 m = SCTP_BUF_NEXT(m);
6552 return (appendchain);
6557 sctp_med_chunk_output(struct sctp_inpcb *inp,
6558 struct sctp_tcb *stcb,
6559 struct sctp_association *asoc,
6562 int control_only, int from_where,
6563 struct timeval *now, int *now_filled, int frag_point, int so_locked
6564 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6570 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6571 uint32_t val SCTP_UNUSED)
6573 struct sctp_copy_all *ca;
6576 int added_control = 0;
6577 int un_sent, do_chunk_output = 1;
6578 struct sctp_association *asoc;
6579 struct sctp_nets *net;
6581 ca = (struct sctp_copy_all *)ptr;
6582 if (ca->m == NULL) {
6585 if (ca->inp != inp) {
6589 if (ca->sndlen > 0) {
6590 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6592 /* can't copy so we are done */
6596 #ifdef SCTP_MBUF_LOGGING
6597 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6600 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6601 if (SCTP_BUF_IS_EXTENDED(mat)) {
6602 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6610 SCTP_TCB_LOCK_ASSERT(stcb);
6611 if (stcb->asoc.alternate) {
6612 net = stcb->asoc.alternate;
6614 net = stcb->asoc.primary_destination;
6616 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6617 /* Abort this assoc with m as the user defined reason */
6619 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6621 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6622 0, M_NOWAIT, 1, MT_DATA);
6623 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6626 struct sctp_paramhdr *ph;
6628 ph = mtod(m, struct sctp_paramhdr *);
6629 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6630 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6633 * We add one here to keep the assoc from dis-appearing on
6636 atomic_add_int(&stcb->asoc.refcnt, 1);
6637 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6639 * sctp_abort_an_association calls sctp_free_asoc() free
6640 * association will NOT free it since we incremented the
6641 * refcnt .. we do this to prevent it being freed and things
6642 * getting tricky since we could end up (from free_asoc)
6643 * calling inpcb_free which would get a recursive lock call
6644 * to the iterator lock.. But as a consequence of that the
6645 * stcb will return to us un-locked.. since free_asoc
6646 * returns with either no TCB or the TCB unlocked, we must
6647 * relock.. to unlock in the iterator timer :-0
6649 SCTP_TCB_LOCK(stcb);
6650 atomic_add_int(&stcb->asoc.refcnt, -1);
6651 goto no_chunk_output;
6654 ret = sctp_msg_append(stcb, net, m,
6658 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6659 /* shutdown this assoc */
6662 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6664 if (TAILQ_EMPTY(&asoc->send_queue) &&
6665 TAILQ_EMPTY(&asoc->sent_queue) &&
6667 if (asoc->locked_on_sending) {
6671 * there is nothing queued to send, so I'm
6674 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6675 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6676 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6678 * only send SHUTDOWN the first time
6681 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6682 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6684 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6685 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6686 sctp_stop_timers_for_shutdown(stcb);
6687 sctp_send_shutdown(stcb, net);
6688 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6690 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6691 asoc->primary_destination);
6693 do_chunk_output = 0;
6697 * we still got (or just got) data to send,
6698 * so set SHUTDOWN_PENDING
6701 * XXX sockets draft says that SCTP_EOF
6702 * should be sent with no data. currently,
6703 * we will allow user data to be sent first
6704 * and move to SHUTDOWN-PENDING
6706 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6707 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6708 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6709 if (asoc->locked_on_sending) {
6711 * Locked to send out the
6714 struct sctp_stream_queue_pending *sp;
6716 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6718 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6719 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6722 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6723 if (TAILQ_EMPTY(&asoc->send_queue) &&
6724 TAILQ_EMPTY(&asoc->sent_queue) &&
6725 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6727 atomic_add_int(&stcb->asoc.refcnt, 1);
6728 sctp_abort_an_association(stcb->sctp_ep, stcb,
6729 NULL, SCTP_SO_NOT_LOCKED);
6730 atomic_add_int(&stcb->asoc.refcnt, -1);
6731 goto no_chunk_output;
6733 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6734 asoc->primary_destination);
6740 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6741 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6743 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6744 (stcb->asoc.total_flight > 0) &&
6745 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6746 do_chunk_output = 0;
6748 if (do_chunk_output)
6749 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6750 else if (added_control) {
6751 int num_out = 0, reason = 0, now_filled = 0;
6755 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6756 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6757 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6768 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6770 struct sctp_copy_all *ca;
6772 ca = (struct sctp_copy_all *)ptr;
6774 * Do a notify here? Kacheong suggests that the notify be done at
6775 * the send time.. so you would push up a notification if any send
6776 * failed. Don't know if this is feasable since the only failures we
6777 * have is "memory" related and if you cannot get an mbuf to send
6778 * the data you surely can't get an mbuf to send up to notify the
6779 * user you can't send the data :->
6782 /* now free everything */
6783 sctp_m_freem(ca->m);
6784 SCTP_FREE(ca, SCTP_M_COPYAL);
6788 #define MC_ALIGN(m, len) do { \
6789 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6794 static struct mbuf *
6795 sctp_copy_out_all(struct uio *uio, int len)
6797 struct mbuf *ret, *at;
6798 int left, willcpy, cancpy, error;
6800 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6806 SCTP_BUF_LEN(ret) = 0;
6807 /* save space for the data chunk header */
6808 cancpy = M_TRAILINGSPACE(ret);
6809 willcpy = min(cancpy, left);
6812 /* Align data to the end */
6813 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6819 SCTP_BUF_LEN(at) = willcpy;
6820 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6823 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6824 if (SCTP_BUF_NEXT(at) == NULL) {
6827 at = SCTP_BUF_NEXT(at);
6828 SCTP_BUF_LEN(at) = 0;
6829 cancpy = M_TRAILINGSPACE(at);
6830 willcpy = min(cancpy, left);
6837 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6838 struct sctp_sndrcvinfo *srcv)
6841 struct sctp_copy_all *ca;
6843 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6850 memset(ca, 0, sizeof(struct sctp_copy_all));
6854 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6857 * take off the sendall flag, it would be bad if we failed to do
6860 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6861 /* get length and mbuf chain */
6863 ca->sndlen = uio->uio_resid;
6864 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6865 if (ca->m == NULL) {
6866 SCTP_FREE(ca, SCTP_M_COPYAL);
6867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6871 /* Gather the length of the send */
6875 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6876 ca->sndlen += SCTP_BUF_LEN(mat);
6879 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6880 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6881 SCTP_ASOC_ANY_STATE,
6883 sctp_sendall_completes, inp, 1);
6885 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6886 SCTP_FREE(ca, SCTP_M_COPYAL);
6887 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6895 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6897 struct sctp_tmit_chunk *chk, *nchk;
6899 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6900 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6901 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6903 sctp_m_freem(chk->data);
6906 asoc->ctrl_queue_cnt--;
6907 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6913 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6915 struct sctp_association *asoc;
6916 struct sctp_tmit_chunk *chk, *nchk;
6917 struct sctp_asconf_chunk *acp;
6920 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6921 /* find SCTP_ASCONF chunk in queue */
6922 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6924 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6925 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6930 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6932 sctp_m_freem(chk->data);
6935 asoc->ctrl_queue_cnt--;
6936 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6943 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6944 struct sctp_association *asoc,
6945 struct sctp_tmit_chunk **data_list,
6947 struct sctp_nets *net)
6950 struct sctp_tmit_chunk *tp1;
6952 for (i = 0; i < bundle_at; i++) {
6953 /* off of the send queue */
6954 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6955 asoc->send_queue_cnt--;
6958 * Any chunk NOT 0 you zap the time chunk 0 gets
6959 * zapped or set based on if a RTO measurment is
6962 data_list[i]->do_rtt = 0;
6965 data_list[i]->sent_rcv_time = net->last_sent_time;
6966 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6967 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6968 if (data_list[i]->whoTo == NULL) {
6969 data_list[i]->whoTo = net;
6970 atomic_add_int(&net->ref_count, 1);
6972 /* on to the sent queue */
6973 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6974 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6975 struct sctp_tmit_chunk *tpp;
6977 /* need to move back */
6979 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6981 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6985 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6988 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6990 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6995 /* This does not lower until the cum-ack passes it */
6996 asoc->sent_queue_cnt++;
6997 if ((asoc->peers_rwnd <= 0) &&
6998 (asoc->total_flight == 0) &&
7000 /* Mark the chunk as being a window probe */
7001 SCTP_STAT_INCR(sctps_windowprobed);
7003 #ifdef SCTP_AUDITING_ENABLED
7004 sctp_audit_log(0xC2, 3);
7006 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7007 data_list[i]->snd_count = 1;
7008 data_list[i]->rec.data.chunk_was_revoked = 0;
7009 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7010 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7011 data_list[i]->whoTo->flight_size,
7012 data_list[i]->book_size,
7013 (uintptr_t) data_list[i]->whoTo,
7014 data_list[i]->rec.data.TSN_seq);
7016 sctp_flight_size_increase(data_list[i]);
7017 sctp_total_flight_increase(stcb, data_list[i]);
7018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7019 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7020 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7022 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7023 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7024 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7025 /* SWS sender side engages */
7026 asoc->peers_rwnd = 0;
7029 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7030 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7035 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7036 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7041 struct sctp_tmit_chunk *chk, *nchk;
7043 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7044 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7045 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7046 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7047 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7048 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7049 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7050 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7051 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7052 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7053 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7054 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7055 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7056 /* Stray chunks must be cleaned up */
7058 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7060 sctp_m_freem(chk->data);
7063 asoc->ctrl_queue_cnt--;
7064 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7065 asoc->fwd_tsn_cnt--;
7066 sctp_free_a_chunk(stcb, chk, so_locked);
7067 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7068 /* special handling, we must look into the param */
7069 if (chk != asoc->str_reset) {
7070 goto clean_up_anyway;
7078 sctp_can_we_split_this(struct sctp_tcb *stcb,
7080 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7083 * Make a decision on if I should split a msg into multiple parts.
7084 * This is only asked of incomplete messages.
7088 * If we are doing EEOR we need to always send it if its the
7089 * entire thing, since it might be all the guy is putting in
7092 if (goal_mtu >= length) {
7094 * If we have data outstanding,
7095 * we get another chance when the sack
7096 * arrives to transmit - wait for more data
7098 if (stcb->asoc.total_flight == 0) {
7100 * If nothing is in flight, we zero the
7108 /* You can fill the rest */
7113 * For those strange folk that make the send buffer
7114 * smaller than our fragmentation point, we can't
7115 * get a full msg in so we have to allow splitting.
7117 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7120 if ((length <= goal_mtu) ||
7121 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7122 /* Sub-optimial residual don't split in non-eeor mode. */
7126 * If we reach here length is larger than the goal_mtu. Do we wish
7127 * to split it for the sake of packet putting together?
7129 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7130 /* Its ok to split it */
7131 return (min(goal_mtu, frag_point));
7133 /* Nope, can't split */
7139 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7140 struct sctp_stream_out *strq,
7142 uint32_t frag_point,
7148 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7153 /* Move from the stream to the send_queue keeping track of the total */
7154 struct sctp_association *asoc;
7155 struct sctp_stream_queue_pending *sp;
7156 struct sctp_tmit_chunk *chk;
7157 struct sctp_data_chunk *dchkh;
7158 uint32_t to_move, length;
7159 uint8_t rcv_flags = 0;
7161 uint8_t send_lock_up = 0;
7163 SCTP_TCB_LOCK_ASSERT(stcb);
7166 /* sa_ignore FREED_MEMORY */
7167 sp = TAILQ_FIRST(&strq->outqueue);
7170 if (send_lock_up == 0) {
7171 SCTP_TCB_SEND_LOCK(stcb);
7174 sp = TAILQ_FIRST(&strq->outqueue);
7178 if (strq->last_msg_incomplete) {
7179 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7181 strq->last_msg_incomplete);
7182 strq->last_msg_incomplete = 0;
7186 SCTP_TCB_SEND_UNLOCK(stcb);
7191 if ((sp->msg_is_complete) && (sp->length == 0)) {
7192 if (sp->sender_all_done) {
7194 * We are doing differed cleanup. Last time through
7195 * when we took all the data the sender_all_done was
7198 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7199 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7200 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7201 sp->sender_all_done,
7203 sp->msg_is_complete,
7207 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7208 SCTP_TCB_SEND_LOCK(stcb);
7211 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7212 TAILQ_REMOVE(&strq->outqueue, sp, next);
7213 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7215 sctp_free_remote_addr(sp->net);
7219 sctp_m_freem(sp->data);
7222 sctp_free_a_strmoq(stcb, sp, so_locked);
7223 /* we can't be locked to it */
7225 stcb->asoc.locked_on_sending = NULL;
7227 SCTP_TCB_SEND_UNLOCK(stcb);
7230 /* back to get the next msg */
7234 * sender just finished this but still holds a
7243 /* is there some to get */
7244 if (sp->length == 0) {
7250 } else if (sp->discard_rest) {
7251 if (send_lock_up == 0) {
7252 SCTP_TCB_SEND_LOCK(stcb);
7255 /* Whack down the size */
7256 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7257 if ((stcb->sctp_socket != NULL) && \
7258 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7259 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7260 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7263 sctp_m_freem(sp->data);
7265 sp->tail_mbuf = NULL;
7275 some_taken = sp->some_taken;
7276 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7277 sp->msg_is_complete = 1;
7280 length = sp->length;
7281 if (sp->msg_is_complete) {
7282 /* The message is complete */
7283 to_move = min(length, frag_point);
7284 if (to_move == length) {
7285 /* All of it fits in the MTU */
7286 if (sp->some_taken) {
7287 rcv_flags |= SCTP_DATA_LAST_FRAG;
7288 sp->put_last_out = 1;
7290 rcv_flags |= SCTP_DATA_NOT_FRAG;
7291 sp->put_last_out = 1;
7294 /* Not all of it fits, we fragment */
7295 if (sp->some_taken == 0) {
7296 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7301 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7304 * We use a snapshot of length in case it
7305 * is expanding during the compare.
7310 if (to_move >= llen) {
7312 if (send_lock_up == 0) {
7314 * We are taking all of an incomplete msg
7315 * thus we need a send lock.
7317 SCTP_TCB_SEND_LOCK(stcb);
7319 if (sp->msg_is_complete) {
7321 * the sender finished the
7328 if (sp->some_taken == 0) {
7329 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7333 /* Nothing to take. */
7334 if (sp->some_taken) {
7343 /* If we reach here, we can copy out a chunk */
7344 sctp_alloc_a_chunk(stcb, chk);
7346 /* No chunk memory */
7352 * Setup for unordered if needed by looking at the user sent info
7355 if (sp->sinfo_flags & SCTP_UNORDERED) {
7356 rcv_flags |= SCTP_DATA_UNORDERED;
7358 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7359 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7360 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7362 /* clear out the chunk before setting up */
7363 memset(chk, 0, sizeof(*chk));
7364 chk->rec.data.rcv_flags = rcv_flags;
7366 if (to_move >= length) {
7367 /* we think we can steal the whole thing */
7368 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7369 SCTP_TCB_SEND_LOCK(stcb);
7372 if (to_move < sp->length) {
7373 /* bail, it changed */
7376 chk->data = sp->data;
7377 chk->last_mbuf = sp->tail_mbuf;
7378 /* register the stealing */
7379 sp->data = sp->tail_mbuf = NULL;
7384 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7385 chk->last_mbuf = NULL;
7386 if (chk->data == NULL) {
7387 sp->some_taken = some_taken;
7388 sctp_free_a_chunk(stcb, chk, so_locked);
7393 #ifdef SCTP_MBUF_LOGGING
7394 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7397 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7398 if (SCTP_BUF_IS_EXTENDED(mat)) {
7399 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7404 /* Pull off the data */
7405 m_adj(sp->data, to_move);
7406 /* Now lets work our way down and compact it */
7408 while (m && (SCTP_BUF_LEN(m) == 0)) {
7409 sp->data = SCTP_BUF_NEXT(m);
7410 SCTP_BUF_NEXT(m) = NULL;
7411 if (sp->tail_mbuf == m) {
7413 * Freeing tail? TSNH since
7414 * we supposedly were taking less
7415 * than the sp->length.
7418 panic("Huh, freing tail? - TSNH");
7420 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7421 sp->tail_mbuf = sp->data = NULL;
7430 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7431 chk->copy_by_ref = 1;
7433 chk->copy_by_ref = 0;
7436 * get last_mbuf and counts of mb useage This is ugly but hopefully
7437 * its only one mbuf.
7439 if (chk->last_mbuf == NULL) {
7440 chk->last_mbuf = chk->data;
7441 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7442 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7445 if (to_move > length) {
7446 /*- This should not happen either
7447 * since we always lower to_move to the size
7448 * of sp->length if its larger.
7451 panic("Huh, how can to_move be larger?");
7453 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7457 atomic_subtract_int(&sp->length, to_move);
7459 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7460 /* Not enough room for a chunk header, get some */
7463 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7466 * we're in trouble here. _PREPEND below will free
7467 * all the data if there is no leading space, so we
7468 * must put the data back and restore.
7470 if (send_lock_up == 0) {
7471 SCTP_TCB_SEND_LOCK(stcb);
7474 if (chk->data == NULL) {
7475 /* unsteal the data */
7476 sp->data = chk->data;
7477 sp->tail_mbuf = chk->last_mbuf;
7481 /* reassemble the data */
7483 sp->data = chk->data;
7484 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7486 sp->some_taken = some_taken;
7487 atomic_add_int(&sp->length, to_move);
7490 sctp_free_a_chunk(stcb, chk, so_locked);
7494 SCTP_BUF_LEN(m) = 0;
7495 SCTP_BUF_NEXT(m) = chk->data;
7497 M_ALIGN(chk->data, 4);
7500 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7501 if (chk->data == NULL) {
7502 /* HELP, TSNH since we assured it would not above? */
7504 panic("prepend failes HELP?");
7506 SCTP_PRINTF("prepend fails HELP?\n");
7507 sctp_free_a_chunk(stcb, chk, so_locked);
7513 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7514 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7515 chk->book_size_scale = 0;
7516 chk->sent = SCTP_DATAGRAM_UNSENT;
7519 chk->asoc = &stcb->asoc;
7520 chk->pad_inplace = 0;
7521 chk->no_fr_allowed = 0;
7522 chk->rec.data.stream_seq = strq->next_sequence_send;
7523 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7524 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7525 strq->next_sequence_send++;
7527 chk->rec.data.stream_number = sp->stream;
7528 chk->rec.data.payloadtype = sp->ppid;
7529 chk->rec.data.context = sp->context;
7530 chk->rec.data.doing_fast_retransmit = 0;
7532 chk->rec.data.timetodrop = sp->ts;
7533 chk->flags = sp->act_flags;
7536 chk->whoTo = sp->net;
7537 atomic_add_int(&chk->whoTo->ref_count, 1);
7541 if (sp->holds_key_ref) {
7542 chk->auth_keyid = sp->auth_keyid;
7543 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7544 chk->holds_key_ref = 1;
7546 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7547 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7548 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7549 (uintptr_t) stcb, sp->length,
7550 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7551 chk->rec.data.TSN_seq);
7553 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7555 * Put the rest of the things in place now. Size was done earlier in
7556 * previous loop prior to padding.
7559 #ifdef SCTP_ASOCLOG_OF_TSNS
7560 SCTP_TCB_LOCK_ASSERT(stcb);
7561 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7562 asoc->tsn_out_at = 0;
7563 asoc->tsn_out_wrapped = 1;
7565 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7566 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7567 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7568 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7569 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7570 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7571 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7572 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7576 dchkh->ch.chunk_type = SCTP_DATA;
7577 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7578 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7579 dchkh->dp.stream_id = htons(strq->stream_no);
7580 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7581 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7582 dchkh->ch.chunk_length = htons(chk->send_size);
7583 /* Now advance the chk->send_size by the actual pad needed. */
7584 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7589 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7590 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7592 chk->last_mbuf = lm;
7593 chk->pad_inplace = 1;
7595 chk->send_size += pads;
7597 if (PR_SCTP_ENABLED(chk->flags)) {
7598 asoc->pr_sctp_cnt++;
7600 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7601 /* All done pull and kill the message */
7602 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7603 if (sp->put_last_out == 0) {
7604 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7605 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7606 sp->sender_all_done,
7608 sp->msg_is_complete,
7612 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7613 SCTP_TCB_SEND_LOCK(stcb);
7616 TAILQ_REMOVE(&strq->outqueue, sp, next);
7617 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7619 sctp_free_remote_addr(sp->net);
7623 sctp_m_freem(sp->data);
7626 sctp_free_a_strmoq(stcb, sp, so_locked);
7628 /* we can't be locked to it */
7630 stcb->asoc.locked_on_sending = NULL;
7632 /* more to go, we are locked */
7635 asoc->chunks_on_out_queue++;
7636 strq->chunks_on_queues++;
7637 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7638 asoc->send_queue_cnt++;
7641 SCTP_TCB_SEND_UNLOCK(stcb);
7648 sctp_fill_outqueue(struct sctp_tcb *stcb,
7649 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7650 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7655 struct sctp_association *asoc;
7656 struct sctp_stream_out *strq;
7657 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7660 SCTP_TCB_LOCK_ASSERT(stcb);
7662 switch (net->ro._l_addr.sa.sa_family) {
7665 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7670 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7675 goal_mtu = net->mtu;
7678 /* Need an allowance for the data chunk header too */
7679 goal_mtu -= sizeof(struct sctp_data_chunk);
7681 /* must make even word boundary */
7682 goal_mtu &= 0xfffffffc;
7683 if (asoc->locked_on_sending) {
7684 /* We are stuck on one stream until the message completes. */
7685 strq = asoc->locked_on_sending;
7688 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7691 while ((goal_mtu > 0) && strq) {
7694 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7695 &giveup, eeor_mode, &bail, so_locked);
7697 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7700 asoc->locked_on_sending = strq;
7701 if ((moved_how_much == 0) || (giveup) || bail)
7702 /* no more to move for now */
7705 asoc->locked_on_sending = NULL;
7706 if ((giveup) || bail) {
7709 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7714 total_moved += moved_how_much;
7715 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7716 goal_mtu &= 0xfffffffc;
7721 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7723 if (total_moved == 0) {
7724 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7725 (net == stcb->asoc.primary_destination)) {
7726 /* ran dry for primary network net */
7727 SCTP_STAT_INCR(sctps_primary_randry);
7728 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7729 /* ran dry with CMT on */
7730 SCTP_STAT_INCR(sctps_cmt_randry);
7736 sctp_fix_ecn_echo(struct sctp_association *asoc)
7738 struct sctp_tmit_chunk *chk;
7740 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7741 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7742 chk->sent = SCTP_DATAGRAM_UNSENT;
7748 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7750 struct sctp_association *asoc;
7751 struct sctp_tmit_chunk *chk;
7752 struct sctp_stream_queue_pending *sp;
7759 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7760 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7761 if (sp->net == net) {
7762 sctp_free_remote_addr(sp->net);
7767 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7768 if (chk->whoTo == net) {
7769 sctp_free_remote_addr(chk->whoTo);
7776 sctp_med_chunk_output(struct sctp_inpcb *inp,
7777 struct sctp_tcb *stcb,
7778 struct sctp_association *asoc,
7781 int control_only, int from_where,
7782 struct timeval *now, int *now_filled, int frag_point, int so_locked
7783 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7789 * Ok this is the generic chunk service queue. we must do the
7790 * following: - Service the stream queue that is next, moving any
7791 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7792 * LAST to the out queue in one pass) and assigning TSN's - Check to
7793 * see if the cwnd/rwnd allows any output, if so we go ahead and
7794 * fomulate and send the low level chunks. Making sure to combine
7795 * any control in the control chunk queue also.
7797 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7798 struct mbuf *outchain, *endoutchain;
7799 struct sctp_tmit_chunk *chk, *nchk;
7801 /* temp arrays for unlinking */
7802 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7803 int no_fragmentflg, error;
7804 unsigned int max_rwnd_per_dest, max_send_per_dest;
7805 int one_chunk, hbflag, skip_data_for_this_net;
7806 int asconf, cookie, no_out_cnt;
7807 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7808 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7810 uint32_t auth_offset = 0;
7811 struct sctp_auth_chunk *auth = NULL;
7812 uint16_t auth_keyid;
7813 int override_ok = 1;
7814 int skip_fill_up = 0;
7815 int data_auth_reqd = 0;
7818 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7824 auth_keyid = stcb->asoc.authinfo.active_keyid;
7825 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7826 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7827 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7832 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7834 * First lets prime the pump. For each destination, if there is room
7835 * in the flight size, attempt to pull an MTU's worth out of the
7836 * stream queues into the general send_queue
7838 #ifdef SCTP_AUDITING_ENABLED
7839 sctp_audit_log(0xC2, 2);
7841 SCTP_TCB_LOCK_ASSERT(stcb);
7843 if ((control_only) || (asoc->stream_reset_outstanding))
7848 /* Nothing to possible to send? */
7849 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7850 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7851 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7852 TAILQ_EMPTY(&asoc->send_queue) &&
7853 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7858 if (asoc->peers_rwnd == 0) {
7859 /* No room in peers rwnd */
7861 if (asoc->total_flight > 0) {
7862 /* we are allowed one chunk in flight */
7866 if (stcb->asoc.ecn_echo_cnt_onq) {
7867 /* Record where a sack goes, if any */
7868 if (no_data_chunks &&
7869 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7870 /* Nothing but ECNe to send - we don't do that */
7871 goto nothing_to_send;
7873 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7874 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7875 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7876 sack_goes_to = chk->whoTo;
7881 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7882 if (stcb->sctp_socket)
7883 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7885 max_send_per_dest = 0;
7886 if (no_data_chunks == 0) {
7887 /* How many non-directed chunks are there? */
7888 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7889 if (chk->whoTo == NULL) {
7891 * We already have non-directed chunks on
7892 * the queue, no need to do a fill-up.
7900 if ((no_data_chunks == 0) &&
7901 (skip_fill_up == 0) &&
7902 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7903 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7905 * This for loop we are in takes in each net, if
7906 * its's got space in cwnd and has data sent to it
7907 * (when CMT is off) then it calls
7908 * sctp_fill_outqueue for the net. This gets data on
7909 * the send queue for that network.
7911 * In sctp_fill_outqueue TSN's are assigned and data is
7912 * copied out of the stream buffers. Note mostly
7913 * copy by reference (we hope).
7915 net->window_probe = 0;
7916 if ((net != stcb->asoc.alternate) &&
7917 ((net->dest_state & SCTP_ADDR_PF) ||
7918 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7919 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7920 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7921 sctp_log_cwnd(stcb, net, 1,
7922 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7926 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7927 (net->flight_size == 0)) {
7928 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7930 if (net->flight_size >= net->cwnd) {
7931 /* skip this network, no room - can't fill */
7932 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7933 sctp_log_cwnd(stcb, net, 3,
7934 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7938 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7939 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7941 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7943 /* memory alloc failure */
7949 /* now service each destination and send out what we can for it */
7950 /* Nothing to send? */
7951 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7952 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7953 TAILQ_EMPTY(&asoc->send_queue)) {
7957 if (asoc->sctp_cmt_on_off > 0) {
7958 /* get the last start point */
7959 start_at = asoc->last_net_cmt_send_started;
7960 if (start_at == NULL) {
7961 /* null so to beginning */
7962 start_at = TAILQ_FIRST(&asoc->nets);
7964 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7965 if (start_at == NULL) {
7966 start_at = TAILQ_FIRST(&asoc->nets);
7969 asoc->last_net_cmt_send_started = start_at;
7971 start_at = TAILQ_FIRST(&asoc->nets);
7973 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7974 if (chk->whoTo == NULL) {
7975 if (asoc->alternate) {
7976 chk->whoTo = asoc->alternate;
7978 chk->whoTo = asoc->primary_destination;
7980 atomic_add_int(&chk->whoTo->ref_count, 1);
7983 old_start_at = NULL;
7984 again_one_more_time:
7985 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7986 /* how much can we send? */
7987 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7988 if (old_start_at && (old_start_at == net)) {
7989 /* through list ocmpletely. */
7993 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7994 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7995 (net->flight_size >= net->cwnd)) {
7997 * Nothing on control or asconf and flight is full,
7998 * we can skip even in the CMT case.
8003 endoutchain = outchain = NULL;
8006 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8007 skip_data_for_this_net = 1;
8009 skip_data_for_this_net = 0;
8011 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
8013 * if we have a route and an ifp check to see if we
8014 * have room to send to this guy
8018 ifp = net->ro.ro_rt->rt_ifp;
8019 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
8020 SCTP_STAT_INCR(sctps_ifnomemqueued);
8021 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
8022 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
8027 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8030 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8035 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8045 if (mtu > asoc->peers_rwnd) {
8046 if (asoc->total_flight > 0) {
8047 /* We have a packet in flight somewhere */
8048 r_mtu = asoc->peers_rwnd;
8050 /* We are always allowed to send one MTU out */
8057 /************************/
8058 /* ASCONF transmission */
8059 /************************/
8060 /* Now first lets go through the asconf queue */
8061 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8062 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8065 if (chk->whoTo == NULL) {
8066 if (asoc->alternate == NULL) {
8067 if (asoc->primary_destination != net) {
8071 if (asoc->alternate != net) {
8076 if (chk->whoTo != net) {
8080 if (chk->data == NULL) {
8083 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8084 chk->sent != SCTP_DATAGRAM_RESEND) {
8088 * if no AUTH is yet included and this chunk
8089 * requires it, make sure to account for it. We
8090 * don't apply the size until the AUTH chunk is
8091 * actually added below in case there is no room for
8092 * this chunk. NOTE: we overload the use of "omtu"
8095 if ((auth == NULL) &&
8096 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8097 stcb->asoc.peer_auth_chunks)) {
8098 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8101 /* Here we do NOT factor the r_mtu */
8102 if ((chk->send_size < (int)(mtu - omtu)) ||
8103 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8105 * We probably should glom the mbuf chain
8106 * from the chk->data for control but the
8107 * problem is it becomes yet one more level
8108 * of tracking to do if for some reason
8109 * output fails. Then I have got to
8110 * reconstruct the merged control chain.. el
8111 * yucko.. for now we take the easy way and
8115 * Add an AUTH chunk, if chunk requires it
8116 * save the offset into the chain for AUTH
8118 if ((auth == NULL) &&
8119 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8120 stcb->asoc.peer_auth_chunks))) {
8121 outchain = sctp_add_auth_chunk(outchain,
8126 chk->rec.chunk_id.id);
8127 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8129 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8130 (int)chk->rec.chunk_id.can_take_data,
8131 chk->send_size, chk->copy_by_ref);
8132 if (outchain == NULL) {
8134 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8137 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8138 /* update our MTU size */
8139 if (mtu > (chk->send_size + omtu))
8140 mtu -= (chk->send_size + omtu);
8143 to_out += (chk->send_size + omtu);
8144 /* Do clear IP_DF ? */
8145 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8148 if (chk->rec.chunk_id.can_take_data)
8151 * set hb flag since we can use these for
8157 * should sysctl this: don't bundle data
8158 * with ASCONF since it requires AUTH
8161 chk->sent = SCTP_DATAGRAM_SENT;
8162 if (chk->whoTo == NULL) {
8164 atomic_add_int(&net->ref_count, 1);
8169 * Ok we are out of room but we can
8170 * output without effecting the
8171 * flight size since this little guy
8172 * is a control only packet.
8174 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8176 * do NOT clear the asconf flag as
8177 * it is used to do appropriate
8178 * source address selection.
8180 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8181 (struct sockaddr *)&net->ro._l_addr,
8182 outchain, auth_offset, auth,
8183 stcb->asoc.authinfo.active_keyid,
8184 no_fragmentflg, 0, asconf,
8185 inp->sctp_lport, stcb->rport,
8186 htonl(stcb->asoc.peer_vtag),
8190 if (error == ENOBUFS) {
8191 asoc->ifp_had_enobuf = 1;
8192 SCTP_STAT_INCR(sctps_lowlevelerr);
8194 if (from_where == 0) {
8195 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8197 if (*now_filled == 0) {
8198 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8200 *now = net->last_sent_time;
8202 net->last_sent_time = *now;
8205 /* error, could not output */
8206 if (error == EHOSTUNREACH) {
8212 sctp_move_chunks_from_net(stcb, net);
8217 asoc->ifp_had_enobuf = 0;
8218 if (*now_filled == 0) {
8219 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8221 *now = net->last_sent_time;
8223 net->last_sent_time = *now;
8227 * increase the number we sent, if a
8228 * cookie is sent we don't tell them
8231 outchain = endoutchain = NULL;
8235 *num_out += ctl_cnt;
8236 /* recalc a clean slate and setup */
8237 switch (net->ro._l_addr.sa.sa_family) {
8240 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8245 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8258 /************************/
8259 /* Control transmission */
8260 /************************/
8261 /* Now first lets go through the control queue */
8262 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8263 if ((sack_goes_to) &&
8264 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8265 (chk->whoTo != sack_goes_to)) {
8267 * if we have a sack in queue, and we are
8268 * looking at an ecn echo that is NOT queued
8269 * to where the sack is going..
8271 if (chk->whoTo == net) {
8273 * Don't transmit it to where its
8274 * going (current net)
8277 } else if (sack_goes_to == net) {
8279 * But do transmit it to this
8282 goto skip_net_check;
8285 if (chk->whoTo == NULL) {
8286 if (asoc->alternate == NULL) {
8287 if (asoc->primary_destination != net) {
8291 if (asoc->alternate != net) {
8296 if (chk->whoTo != net) {
8301 if (chk->data == NULL) {
8304 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8306 * It must be unsent. Cookies and ASCONF's
8307 * hang around but there timers will force
8308 * when marked for resend.
8313 * if no AUTH is yet included and this chunk
8314 * requires it, make sure to account for it. We
8315 * don't apply the size until the AUTH chunk is
8316 * actually added below in case there is no room for
8317 * this chunk. NOTE: we overload the use of "omtu"
8320 if ((auth == NULL) &&
8321 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8322 stcb->asoc.peer_auth_chunks)) {
8323 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8326 /* Here we do NOT factor the r_mtu */
8327 if ((chk->send_size <= (int)(mtu - omtu)) ||
8328 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8330 * We probably should glom the mbuf chain
8331 * from the chk->data for control but the
8332 * problem is it becomes yet one more level
8333 * of tracking to do if for some reason
8334 * output fails. Then I have got to
8335 * reconstruct the merged control chain.. el
8336 * yucko.. for now we take the easy way and
8340 * Add an AUTH chunk, if chunk requires it
8341 * save the offset into the chain for AUTH
8343 if ((auth == NULL) &&
8344 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8345 stcb->asoc.peer_auth_chunks))) {
8346 outchain = sctp_add_auth_chunk(outchain,
8351 chk->rec.chunk_id.id);
8352 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8354 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8355 (int)chk->rec.chunk_id.can_take_data,
8356 chk->send_size, chk->copy_by_ref);
8357 if (outchain == NULL) {
8359 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8362 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8363 /* update our MTU size */
8364 if (mtu > (chk->send_size + omtu))
8365 mtu -= (chk->send_size + omtu);
8368 to_out += (chk->send_size + omtu);
8369 /* Do clear IP_DF ? */
8370 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8373 if (chk->rec.chunk_id.can_take_data)
8375 /* Mark things to be removed, if needed */
8376 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8377 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8378 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8379 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8380 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8381 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8382 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8383 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8384 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8385 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8386 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8387 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8390 /* remove these chunks at the end */
8391 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8392 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8393 /* turn off the timer */
8394 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8395 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8396 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8402 * Other chunks, since they have
8403 * timers running (i.e. COOKIE) we
8404 * just "trust" that it gets sent or
8408 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8411 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8413 * Increment ecne send count
8414 * here this means we may be
8415 * over-zealous in our
8416 * counting if the send
8417 * fails, but its the best
8418 * place to do it (we used
8419 * to do it in the queue of
8420 * the chunk, but that did
8421 * not tell how many times
8424 SCTP_STAT_INCR(sctps_sendecne);
8426 chk->sent = SCTP_DATAGRAM_SENT;
8427 if (chk->whoTo == NULL) {
8429 atomic_add_int(&net->ref_count, 1);
8435 * Ok we are out of room but we can
8436 * output without effecting the
8437 * flight size since this little guy
8438 * is a control only packet.
8441 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8443 * do NOT clear the asconf
8444 * flag as it is used to do
8445 * appropriate source
8446 * address selection.
8450 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8453 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8454 (struct sockaddr *)&net->ro._l_addr,
8457 stcb->asoc.authinfo.active_keyid,
8458 no_fragmentflg, 0, asconf,
8459 inp->sctp_lport, stcb->rport,
8460 htonl(stcb->asoc.peer_vtag),
8464 if (error == ENOBUFS) {
8465 asoc->ifp_had_enobuf = 1;
8466 SCTP_STAT_INCR(sctps_lowlevelerr);
8468 if (from_where == 0) {
8469 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8471 /* error, could not output */
8473 if (*now_filled == 0) {
8474 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8476 *now = net->last_sent_time;
8478 net->last_sent_time = *now;
8482 if (error == EHOSTUNREACH) {
8488 sctp_move_chunks_from_net(stcb, net);
8493 asoc->ifp_had_enobuf = 0;
8494 /* Only HB or ASCONF advances time */
8496 if (*now_filled == 0) {
8497 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8499 *now = net->last_sent_time;
8501 net->last_sent_time = *now;
8506 * increase the number we sent, if a
8507 * cookie is sent we don't tell them
8510 outchain = endoutchain = NULL;
8514 *num_out += ctl_cnt;
8515 /* recalc a clean slate and setup */
8516 switch (net->ro._l_addr.sa.sa_family) {
8519 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8524 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8537 /* JRI: if dest is in PF state, do not send data to it */
8538 if ((asoc->sctp_cmt_on_off > 0) &&
8539 (net != stcb->asoc.alternate) &&
8540 (net->dest_state & SCTP_ADDR_PF)) {
8543 if (net->flight_size >= net->cwnd) {
8546 if ((asoc->sctp_cmt_on_off > 0) &&
8547 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8548 (net->flight_size > max_rwnd_per_dest)) {
8552 * We need a specific accounting for the usage of the send
8553 * buffer. We also need to check the number of messages per
8554 * net. For now, this is better than nothing and it disabled
8557 if ((asoc->sctp_cmt_on_off > 0) &&
8558 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8559 (max_send_per_dest > 0) &&
8560 (net->flight_size > max_send_per_dest)) {
8563 /*********************/
8564 /* Data transmission */
8565 /*********************/
8567 * if AUTH for DATA is required and no AUTH has been added
8568 * yet, account for this in the mtu now... if no data can be
8569 * bundled, this adjustment won't matter anyways since the
8570 * packet will be going out...
8572 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8573 stcb->asoc.peer_auth_chunks);
8574 if (data_auth_reqd && (auth == NULL)) {
8575 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8577 /* now lets add any data within the MTU constraints */
8578 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8581 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8582 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8589 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8590 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8600 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8601 (skip_data_for_this_net == 0)) ||
8603 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8604 if (no_data_chunks) {
8605 /* let only control go out */
8609 if (net->flight_size >= net->cwnd) {
8610 /* skip this net, no room for data */
8614 if ((chk->whoTo != NULL) &&
8615 (chk->whoTo != net)) {
8616 /* Don't send the chunk on this net */
8619 if (asoc->sctp_cmt_on_off == 0) {
8620 if ((asoc->alternate) &&
8621 (asoc->alternate != net) &&
8622 (chk->whoTo == NULL)) {
8624 } else if ((net != asoc->primary_destination) &&
8625 (asoc->alternate == NULL) &&
8626 (chk->whoTo == NULL)) {
8630 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8632 * strange, we have a chunk that is
8633 * to big for its destination and
8634 * yet no fragment ok flag.
8635 * Something went wrong when the
8636 * PMTU changed...we did not mark
8637 * this chunk for some reason?? I
8638 * will fix it here by letting IP
8639 * fragment it for now and printing
8640 * a warning. This really should not
8643 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8644 chk->send_size, mtu);
8645 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8647 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8648 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8649 struct sctp_data_chunk *dchkh;
8651 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8652 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8654 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8655 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8656 /* ok we will add this one */
8659 * Add an AUTH chunk, if chunk
8660 * requires it, save the offset into
8661 * the chain for AUTH
8663 if (data_auth_reqd) {
8665 outchain = sctp_add_auth_chunk(outchain,
8671 auth_keyid = chk->auth_keyid;
8673 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8674 } else if (override_ok) {
8679 auth_keyid = chk->auth_keyid;
8681 } else if (auth_keyid != chk->auth_keyid) {
8689 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8690 chk->send_size, chk->copy_by_ref);
8691 if (outchain == NULL) {
8692 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8693 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8694 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8697 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8700 /* upate our MTU size */
8701 /* Do clear IP_DF ? */
8702 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8705 /* unsigned subtraction of mtu */
8706 if (mtu > chk->send_size)
8707 mtu -= chk->send_size;
8710 /* unsigned subtraction of r_mtu */
8711 if (r_mtu > chk->send_size)
8712 r_mtu -= chk->send_size;
8716 to_out += chk->send_size;
8717 if ((to_out > mx_mtu) && no_fragmentflg) {
8719 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8721 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8725 chk->window_probe = 0;
8726 data_list[bundle_at++] = chk;
8727 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8730 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8731 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8732 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8734 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8736 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8737 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8747 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8749 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8750 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8751 data_list[0]->window_probe = 1;
8752 net->window_probe = 1;
8758 * Must be sent in order of the
8759 * TSN's (on a network)
8763 } /* for (chunk gather loop for this net) */
8764 } /* if asoc.state OPEN */
8766 /* Is there something to send for this destination? */
8768 /* We may need to start a control timer or two */
8770 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8773 * do NOT clear the asconf flag as it is
8774 * used to do appropriate source address
8779 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8782 /* must start a send timer if data is being sent */
8783 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8785 * no timer running on this destination
8788 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8790 /* Now send it, if there is anything to send :> */
8791 if ((error = sctp_lowlevel_chunk_output(inp,
8794 (struct sockaddr *)&net->ro._l_addr,
8802 inp->sctp_lport, stcb->rport,
8803 htonl(stcb->asoc.peer_vtag),
8807 /* error, we could not output */
8808 if (error == ENOBUFS) {
8809 SCTP_STAT_INCR(sctps_lowlevelerr);
8810 asoc->ifp_had_enobuf = 1;
8812 if (from_where == 0) {
8813 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8815 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8817 if (*now_filled == 0) {
8818 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8820 *now = net->last_sent_time;
8822 net->last_sent_time = *now;
8826 if (error == EHOSTUNREACH) {
8828 * Destination went unreachable
8831 sctp_move_chunks_from_net(stcb, net);
8835 * I add this line to be paranoid. As far as
8836 * I can tell the continue, takes us back to
8837 * the top of the for, but just to make sure
8838 * I will reset these again here.
8840 ctl_cnt = bundle_at = 0;
8841 continue; /* This takes us back to the
8842 * for() for the nets. */
8844 asoc->ifp_had_enobuf = 0;
8849 if (bundle_at || hbflag) {
8850 /* For data/asconf and hb set time */
8851 if (*now_filled == 0) {
8852 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8854 *now = net->last_sent_time;
8856 net->last_sent_time = *now;
8860 *num_out += (ctl_cnt + bundle_at);
8863 /* setup for a RTO measurement */
8864 tsns_sent = data_list[0]->rec.data.TSN_seq;
8865 /* fill time if not already filled */
8866 if (*now_filled == 0) {
8867 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8869 *now = asoc->time_last_sent;
8871 asoc->time_last_sent = *now;
8873 if (net->rto_needed) {
8874 data_list[0]->do_rtt = 1;
8875 net->rto_needed = 0;
8877 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8878 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8884 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8885 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8888 if (old_start_at == NULL) {
8889 old_start_at = start_at;
8890 start_at = TAILQ_FIRST(&asoc->nets);
8892 goto again_one_more_time;
8895 * At the end there should be no NON timed chunks hanging on this
8898 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8899 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8901 if ((*num_out == 0) && (*reason_code == 0)) {
8906 sctp_clean_up_ctl(stcb, asoc, so_locked);
8911 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8914 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8915 * the control chunk queue.
8917 struct sctp_chunkhdr *hdr;
8918 struct sctp_tmit_chunk *chk;
8921 SCTP_TCB_LOCK_ASSERT(stcb);
8922 sctp_alloc_a_chunk(stcb, chk);
8925 sctp_m_freem(op_err);
8928 chk->copy_by_ref = 0;
8929 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8930 if (op_err == NULL) {
8931 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8935 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8936 chk->send_size += SCTP_BUF_LEN(mat);
8938 chk->sent = SCTP_DATAGRAM_UNSENT;
8940 chk->asoc = &stcb->asoc;
8943 hdr = mtod(op_err, struct sctp_chunkhdr *);
8944 hdr->chunk_type = SCTP_OPERATION_ERROR;
8945 hdr->chunk_flags = 0;
8946 hdr->chunk_length = htons(chk->send_size);
8947 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8950 chk->asoc->ctrl_queue_cnt++;
8954 sctp_send_cookie_echo(struct mbuf *m,
8956 struct sctp_tcb *stcb,
8957 struct sctp_nets *net)
8960 * pull out the cookie and put it at the front of the control chunk
8964 struct mbuf *cookie;
8965 struct sctp_paramhdr parm, *phdr;
8966 struct sctp_chunkhdr *hdr;
8967 struct sctp_tmit_chunk *chk;
8968 uint16_t ptype, plen;
8970 /* First find the cookie in the param area */
8972 at = offset + sizeof(struct sctp_init_chunk);
8974 SCTP_TCB_LOCK_ASSERT(stcb);
8976 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8980 ptype = ntohs(phdr->param_type);
8981 plen = ntohs(phdr->param_length);
8982 if (ptype == SCTP_STATE_COOKIE) {
8985 /* found the cookie */
8986 if ((pad = (plen % 4))) {
8989 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8990 if (cookie == NULL) {
8994 #ifdef SCTP_MBUF_LOGGING
8995 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8998 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8999 if (SCTP_BUF_IS_EXTENDED(mat)) {
9000 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9007 at += SCTP_SIZE32(plen);
9009 if (cookie == NULL) {
9010 /* Did not find the cookie */
9013 /* ok, we got the cookie lets change it into a cookie echo chunk */
9015 /* first the change from param to cookie */
9016 hdr = mtod(cookie, struct sctp_chunkhdr *);
9017 hdr->chunk_type = SCTP_COOKIE_ECHO;
9018 hdr->chunk_flags = 0;
9019 /* get the chunk stuff now and place it in the FRONT of the queue */
9020 sctp_alloc_a_chunk(stcb, chk);
9023 sctp_m_freem(cookie);
9026 chk->copy_by_ref = 0;
9027 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9028 chk->rec.chunk_id.can_take_data = 0;
9029 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9030 chk->send_size = plen;
9031 chk->sent = SCTP_DATAGRAM_UNSENT;
9033 chk->asoc = &stcb->asoc;
9036 atomic_add_int(&chk->whoTo->ref_count, 1);
9037 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9038 chk->asoc->ctrl_queue_cnt++;
9043 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9047 struct sctp_nets *net)
9050 * take a HB request and make it into a HB ack and send it.
9052 struct mbuf *outchain;
9053 struct sctp_chunkhdr *chdr;
9054 struct sctp_tmit_chunk *chk;
9058 /* must have a net pointer */
9061 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9062 if (outchain == NULL) {
9063 /* gak out of memory */
9066 #ifdef SCTP_MBUF_LOGGING
9067 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9070 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
9071 if (SCTP_BUF_IS_EXTENDED(mat)) {
9072 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9077 chdr = mtod(outchain, struct sctp_chunkhdr *);
9078 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9079 chdr->chunk_flags = 0;
9080 if (chk_length % 4) {
9082 uint32_t cpthis = 0;
9085 padlen = 4 - (chk_length % 4);
9086 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9088 sctp_alloc_a_chunk(stcb, chk);
9091 sctp_m_freem(outchain);
9094 chk->copy_by_ref = 0;
9095 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9096 chk->rec.chunk_id.can_take_data = 1;
9098 chk->send_size = chk_length;
9099 chk->sent = SCTP_DATAGRAM_UNSENT;
9101 chk->asoc = &stcb->asoc;
9102 chk->data = outchain;
9104 atomic_add_int(&chk->whoTo->ref_count, 1);
9105 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9106 chk->asoc->ctrl_queue_cnt++;
9110 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9112 /* formulate and queue a cookie-ack back to sender */
9113 struct mbuf *cookie_ack;
9114 struct sctp_chunkhdr *hdr;
9115 struct sctp_tmit_chunk *chk;
9117 SCTP_TCB_LOCK_ASSERT(stcb);
9119 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9120 if (cookie_ack == NULL) {
9124 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9125 sctp_alloc_a_chunk(stcb, chk);
9128 sctp_m_freem(cookie_ack);
9131 chk->copy_by_ref = 0;
9132 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9133 chk->rec.chunk_id.can_take_data = 1;
9135 chk->send_size = sizeof(struct sctp_chunkhdr);
9136 chk->sent = SCTP_DATAGRAM_UNSENT;
9138 chk->asoc = &stcb->asoc;
9139 chk->data = cookie_ack;
9140 if (chk->asoc->last_control_chunk_from != NULL) {
9141 chk->whoTo = chk->asoc->last_control_chunk_from;
9142 atomic_add_int(&chk->whoTo->ref_count, 1);
9146 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9147 hdr->chunk_type = SCTP_COOKIE_ACK;
9148 hdr->chunk_flags = 0;
9149 hdr->chunk_length = htons(chk->send_size);
9150 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9151 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9152 chk->asoc->ctrl_queue_cnt++;
9158 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9160 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9161 struct mbuf *m_shutdown_ack;
9162 struct sctp_shutdown_ack_chunk *ack_cp;
9163 struct sctp_tmit_chunk *chk;
9165 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9166 if (m_shutdown_ack == NULL) {
9170 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9171 sctp_alloc_a_chunk(stcb, chk);
9174 sctp_m_freem(m_shutdown_ack);
9177 chk->copy_by_ref = 0;
9178 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9179 chk->rec.chunk_id.can_take_data = 1;
9181 chk->send_size = sizeof(struct sctp_chunkhdr);
9182 chk->sent = SCTP_DATAGRAM_UNSENT;
9185 chk->asoc = &stcb->asoc;
9186 chk->data = m_shutdown_ack;
9189 atomic_add_int(&chk->whoTo->ref_count, 1);
9191 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9192 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9193 ack_cp->ch.chunk_flags = 0;
9194 ack_cp->ch.chunk_length = htons(chk->send_size);
9195 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9196 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9197 chk->asoc->ctrl_queue_cnt++;
9202 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9204 /* formulate and queue a SHUTDOWN to the sender */
9205 struct mbuf *m_shutdown;
9206 struct sctp_shutdown_chunk *shutdown_cp;
9207 struct sctp_tmit_chunk *chk;
9209 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9210 if (m_shutdown == NULL) {
9214 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9215 sctp_alloc_a_chunk(stcb, chk);
9218 sctp_m_freem(m_shutdown);
9221 chk->copy_by_ref = 0;
9222 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9223 chk->rec.chunk_id.can_take_data = 1;
9225 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9226 chk->sent = SCTP_DATAGRAM_UNSENT;
9229 chk->asoc = &stcb->asoc;
9230 chk->data = m_shutdown;
9233 atomic_add_int(&chk->whoTo->ref_count, 1);
9235 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9236 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9237 shutdown_cp->ch.chunk_flags = 0;
9238 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9239 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9240 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9241 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9242 chk->asoc->ctrl_queue_cnt++;
9247 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9250 * formulate and queue an ASCONF to the peer. ASCONF parameters
9251 * should be queued on the assoc queue.
9253 struct sctp_tmit_chunk *chk;
9254 struct mbuf *m_asconf;
9257 SCTP_TCB_LOCK_ASSERT(stcb);
9259 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9260 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9261 /* can't send a new one if there is one in flight already */
9264 /* compose an ASCONF chunk, maximum length is PMTU */
9265 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9266 if (m_asconf == NULL) {
9269 sctp_alloc_a_chunk(stcb, chk);
9272 sctp_m_freem(m_asconf);
9275 chk->copy_by_ref = 0;
9276 chk->rec.chunk_id.id = SCTP_ASCONF;
9277 chk->rec.chunk_id.can_take_data = 0;
9278 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9279 chk->data = m_asconf;
9280 chk->send_size = len;
9281 chk->sent = SCTP_DATAGRAM_UNSENT;
9283 chk->asoc = &stcb->asoc;
9286 atomic_add_int(&chk->whoTo->ref_count, 1);
9288 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9289 chk->asoc->ctrl_queue_cnt++;
9294 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9297 * formulate and queue a asconf-ack back to sender. the asconf-ack
9298 * must be stored in the tcb.
9300 struct sctp_tmit_chunk *chk;
9301 struct sctp_asconf_ack *ack, *latest_ack;
9303 struct sctp_nets *net = NULL;
9305 SCTP_TCB_LOCK_ASSERT(stcb);
9306 /* Get the latest ASCONF-ACK */
9307 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9308 if (latest_ack == NULL) {
9311 if (latest_ack->last_sent_to != NULL &&
9312 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9313 /* we're doing a retransmission */
9314 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9317 if (stcb->asoc.last_control_chunk_from == NULL) {
9318 if (stcb->asoc.alternate) {
9319 net = stcb->asoc.alternate;
9321 net = stcb->asoc.primary_destination;
9324 net = stcb->asoc.last_control_chunk_from;
9329 if (stcb->asoc.last_control_chunk_from == NULL) {
9330 if (stcb->asoc.alternate) {
9331 net = stcb->asoc.alternate;
9333 net = stcb->asoc.primary_destination;
9336 net = stcb->asoc.last_control_chunk_from;
9339 latest_ack->last_sent_to = net;
9341 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9342 if (ack->data == NULL) {
9345 /* copy the asconf_ack */
9346 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9347 if (m_ack == NULL) {
9348 /* couldn't copy it */
9351 #ifdef SCTP_MBUF_LOGGING
9352 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9355 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9356 if (SCTP_BUF_IS_EXTENDED(mat)) {
9357 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9363 sctp_alloc_a_chunk(stcb, chk);
9367 sctp_m_freem(m_ack);
9370 chk->copy_by_ref = 0;
9371 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9372 chk->rec.chunk_id.can_take_data = 1;
9373 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9376 atomic_add_int(&chk->whoTo->ref_count, 1);
9381 chk->send_size = ack->len;
9382 chk->sent = SCTP_DATAGRAM_UNSENT;
9384 chk->asoc = &stcb->asoc;
9386 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9387 chk->asoc->ctrl_queue_cnt++;
9394 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9395 struct sctp_tcb *stcb,
9396 struct sctp_association *asoc,
9397 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9398 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9404 * send out one MTU of retransmission. If fast_retransmit is
9405 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9406 * rwnd. For a Cookie or Asconf in the control chunk queue we
9407 * retransmit them by themselves.
9409 * For data chunks we will pick out the lowest TSN's in the sent_queue
9410 * marked for resend and bundle them all together (up to a MTU of
9411 * destination). The address to send to should have been
9412 * selected/changed where the retransmission was marked (i.e. in FR
9413 * or t3-timeout routines).
9415 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9416 struct sctp_tmit_chunk *chk, *fwd;
9417 struct mbuf *m, *endofchain;
9418 struct sctp_nets *net = NULL;
9419 uint32_t tsns_sent = 0;
9420 int no_fragmentflg, bundle_at, cnt_thru;
9422 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9423 struct sctp_auth_chunk *auth = NULL;
9424 uint32_t auth_offset = 0;
9425 uint16_t auth_keyid;
9426 int override_ok = 1;
9427 int data_auth_reqd = 0;
9430 SCTP_TCB_LOCK_ASSERT(stcb);
9431 tmr_started = ctl_cnt = bundle_at = error = 0;
9436 endofchain = m = NULL;
9437 auth_keyid = stcb->asoc.authinfo.active_keyid;
9438 #ifdef SCTP_AUDITING_ENABLED
9439 sctp_audit_log(0xC3, 1);
9441 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9442 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9443 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9444 asoc->sent_queue_retran_cnt);
9445 asoc->sent_queue_cnt = 0;
9446 asoc->sent_queue_cnt_removeable = 0;
9447 /* send back 0/0 so we enter normal transmission */
9451 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9452 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9453 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9454 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9455 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9458 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9459 if (chk != asoc->str_reset) {
9461 * not eligible for retran if its
9468 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9472 * Add an AUTH chunk, if chunk requires it save the
9473 * offset into the chain for AUTH
9475 if ((auth == NULL) &&
9476 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9477 stcb->asoc.peer_auth_chunks))) {
9478 m = sctp_add_auth_chunk(m, &endofchain,
9479 &auth, &auth_offset,
9481 chk->rec.chunk_id.id);
9482 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9484 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9490 /* do we have control chunks to retransmit? */
9492 /* Start a timer no matter if we suceed or fail */
9493 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9494 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9495 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9496 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9497 chk->snd_count++; /* update our count */
9498 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9499 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9500 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9501 no_fragmentflg, 0, 0,
9502 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9503 chk->whoTo->port, NULL,
9506 SCTP_STAT_INCR(sctps_lowlevelerr);
9513 * We don't want to mark the net->sent time here since this
9514 * we use this for HB and retrans cannot measure RTT
9516 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9518 chk->sent = SCTP_DATAGRAM_SENT;
9519 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9523 /* Clean up the fwd-tsn list */
9524 sctp_clean_up_ctl(stcb, asoc, so_locked);
9529 * Ok, it is just data retransmission we need to do or that and a
9530 * fwd-tsn with it all.
9532 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9533 return (SCTP_RETRAN_DONE);
9535 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9536 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9537 /* not yet open, resend the cookie and that is it */
9540 #ifdef SCTP_AUDITING_ENABLED
9541 sctp_auditing(20, inp, stcb, NULL);
9543 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9544 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9545 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9546 /* No, not sent to this net or not ready for rtx */
9549 if (chk->data == NULL) {
9550 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9551 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9554 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9555 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9556 /* Gak, we have exceeded max unlucky retran, abort! */
9557 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9559 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9560 atomic_add_int(&stcb->asoc.refcnt, 1);
9561 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9562 SCTP_TCB_LOCK(stcb);
9563 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9564 return (SCTP_RETRAN_EXIT);
9566 /* pick up the net */
9568 switch (net->ro._l_addr.sa.sa_family) {
9571 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9576 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9585 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9586 /* No room in peers rwnd */
9589 tsn = asoc->last_acked_seq + 1;
9590 if (tsn == chk->rec.data.TSN_seq) {
9592 * we make a special exception for this
9593 * case. The peer has no rwnd but is missing
9594 * the lowest chunk.. which is probably what
9595 * is holding up the rwnd.
9597 goto one_chunk_around;
9602 if (asoc->peers_rwnd < mtu) {
9604 if ((asoc->peers_rwnd == 0) &&
9605 (asoc->total_flight == 0)) {
9606 chk->window_probe = 1;
9607 chk->whoTo->window_probe = 1;
9610 #ifdef SCTP_AUDITING_ENABLED
9611 sctp_audit_log(0xC3, 2);
9615 net->fast_retran_ip = 0;
9616 if (chk->rec.data.doing_fast_retransmit == 0) {
9618 * if no FR in progress skip destination that have
9619 * flight_size > cwnd.
9621 if (net->flight_size >= net->cwnd) {
9626 * Mark the destination net to have FR recovery
9630 net->fast_retran_ip = 1;
9634 * if no AUTH is yet included and this chunk requires it,
9635 * make sure to account for it. We don't apply the size
9636 * until the AUTH chunk is actually added below in case
9637 * there is no room for this chunk.
9639 if (data_auth_reqd && (auth == NULL)) {
9640 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9644 if ((chk->send_size <= (mtu - dmtu)) ||
9645 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9646 /* ok we will add this one */
9647 if (data_auth_reqd) {
9649 m = sctp_add_auth_chunk(m,
9655 auth_keyid = chk->auth_keyid;
9657 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9658 } else if (override_ok) {
9659 auth_keyid = chk->auth_keyid;
9661 } else if (chk->auth_keyid != auth_keyid) {
9662 /* different keyid, so done bundling */
9666 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9668 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9671 /* Do clear IP_DF ? */
9672 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9675 /* upate our MTU size */
9676 if (mtu > (chk->send_size + dmtu))
9677 mtu -= (chk->send_size + dmtu);
9680 data_list[bundle_at++] = chk;
9681 if (one_chunk && (asoc->total_flight <= 0)) {
9682 SCTP_STAT_INCR(sctps_windowprobed);
9685 if (one_chunk == 0) {
9687 * now are there anymore forward from chk to pick
9690 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9691 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9692 /* Nope, not for retran */
9695 if (fwd->whoTo != net) {
9696 /* Nope, not the net in question */
9699 if (data_auth_reqd && (auth == NULL)) {
9700 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9703 if (fwd->send_size <= (mtu - dmtu)) {
9704 if (data_auth_reqd) {
9706 m = sctp_add_auth_chunk(m,
9712 auth_keyid = fwd->auth_keyid;
9714 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9715 } else if (override_ok) {
9716 auth_keyid = fwd->auth_keyid;
9718 } else if (fwd->auth_keyid != auth_keyid) {
9726 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9728 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9731 /* Do clear IP_DF ? */
9732 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9735 /* upate our MTU size */
9736 if (mtu > (fwd->send_size + dmtu))
9737 mtu -= (fwd->send_size + dmtu);
9740 data_list[bundle_at++] = fwd;
9741 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9745 /* can't fit so we are done */
9750 /* Is there something to send for this destination? */
9753 * No matter if we fail/or suceed we should start a
9754 * timer. A failure is like a lost IP packet :-)
9756 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9758 * no timer running on this destination
9761 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9764 /* Now lets send it, if there is anything to send :> */
9765 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9766 (struct sockaddr *)&net->ro._l_addr, m,
9767 auth_offset, auth, auth_keyid,
9768 no_fragmentflg, 0, 0,
9769 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9773 /* error, we could not output */
9774 SCTP_STAT_INCR(sctps_lowlevelerr);
9782 * We don't want to mark the net->sent time here
9783 * since this we use this for HB and retrans cannot
9786 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9788 /* For auto-close */
9790 if (*now_filled == 0) {
9791 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9792 *now = asoc->time_last_sent;
9795 asoc->time_last_sent = *now;
9797 *cnt_out += bundle_at;
9798 #ifdef SCTP_AUDITING_ENABLED
9799 sctp_audit_log(0xC4, bundle_at);
9802 tsns_sent = data_list[0]->rec.data.TSN_seq;
9804 for (i = 0; i < bundle_at; i++) {
9805 SCTP_STAT_INCR(sctps_sendretransdata);
9806 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9808 * When we have a revoked data, and we
9809 * retransmit it, then we clear the revoked
9810 * flag since this flag dictates if we
9811 * subtracted from the fs
9813 if (data_list[i]->rec.data.chunk_was_revoked) {
9814 /* Deflate the cwnd */
9815 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9816 data_list[i]->rec.data.chunk_was_revoked = 0;
9818 data_list[i]->snd_count++;
9819 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9820 /* record the time */
9821 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9822 if (data_list[i]->book_size_scale) {
9824 * need to double the book size on
9827 data_list[i]->book_size_scale = 0;
9829 * Since we double the booksize, we
9830 * must also double the output queue
9831 * size, since this get shrunk when
9832 * we free by this amount.
9834 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9835 data_list[i]->book_size *= 2;
9839 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9840 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9841 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9843 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9844 (uint32_t) (data_list[i]->send_size +
9845 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9847 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9848 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9849 data_list[i]->whoTo->flight_size,
9850 data_list[i]->book_size,
9851 (uintptr_t) data_list[i]->whoTo,
9852 data_list[i]->rec.data.TSN_seq);
9854 sctp_flight_size_increase(data_list[i]);
9855 sctp_total_flight_increase(stcb, data_list[i]);
9856 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9857 /* SWS sender side engages */
9858 asoc->peers_rwnd = 0;
9861 (data_list[i]->rec.data.doing_fast_retransmit)) {
9862 SCTP_STAT_INCR(sctps_sendfastretrans);
9863 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9864 (tmr_started == 0)) {
9866 * ok we just fast-retrans'd
9867 * the lowest TSN, i.e the
9868 * first on the list. In
9869 * this case we want to give
9870 * some more time to get a
9871 * SACK back without a
9874 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9875 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9876 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9880 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9881 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9883 #ifdef SCTP_AUDITING_ENABLED
9884 sctp_auditing(21, inp, stcb, NULL);
9890 if (asoc->sent_queue_retran_cnt <= 0) {
9891 /* all done we have no more to retran */
9892 asoc->sent_queue_retran_cnt = 0;
9896 /* No more room in rwnd */
9899 /* stop the for loop here. we sent out a packet */
9906 sctp_timer_validation(struct sctp_inpcb *inp,
9907 struct sctp_tcb *stcb,
9908 struct sctp_association *asoc)
9910 struct sctp_nets *net;
9912 /* Validate that a timer is running somewhere */
9913 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9914 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9915 /* Here is a timer */
9919 SCTP_TCB_LOCK_ASSERT(stcb);
9920 /* Gak, we did not have a timer somewhere */
9921 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9922 if (asoc->alternate) {
9923 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9925 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9931 sctp_chunk_output(struct sctp_inpcb *inp,
9932 struct sctp_tcb *stcb,
9935 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9941 * Ok this is the generic chunk service queue. we must do the
9943 * - See if there are retransmits pending, if so we must
9945 * - Service the stream queue that is next, moving any
9946 * message (note I must get a complete message i.e.
9947 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9949 * - Check to see if the cwnd/rwnd allows any output, if so we
9950 * go ahead and fomulate and send the low level chunks. Making sure
9951 * to combine any control in the control chunk queue also.
9953 struct sctp_association *asoc;
9954 struct sctp_nets *net;
9955 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9956 unsigned int burst_cnt = 0;
9960 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9963 unsigned int tot_frs = 0;
9966 /* The Nagle algorithm is only applied when handling a send call. */
9967 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9968 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9976 SCTP_TCB_LOCK_ASSERT(stcb);
9978 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9980 if ((un_sent <= 0) &&
9981 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9982 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9983 (asoc->sent_queue_retran_cnt == 0)) {
9984 /* Nothing to do unless there is something to be sent left */
9988 * Do we have something to send, data or control AND a sack timer
9989 * running, if so piggy-back the sack.
9991 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9992 sctp_send_sack(stcb, so_locked);
9993 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9995 while (asoc->sent_queue_retran_cnt) {
9997 * Ok, it is retransmission time only, we send out only ONE
9998 * packet with a single call off to the retran code.
10000 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
10002 * Special hook for handling cookiess discarded
10003 * by peer that carried data. Send cookie-ack only
10004 * and then the next call with get the retran's.
10006 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10008 &now, &now_filled, frag_point, so_locked);
10010 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
10011 /* if its not from a HB then do it */
10013 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10019 * its from any other place, we don't allow retran
10020 * output (only control)
10025 /* Can't send anymore */
10027 * now lets push out control by calling med-level
10028 * output once. this assures that we WILL send HB's
10031 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10033 &now, &now_filled, frag_point, so_locked);
10034 #ifdef SCTP_AUDITING_ENABLED
10035 sctp_auditing(8, inp, stcb, NULL);
10037 sctp_timer_validation(inp, stcb, asoc);
10042 * The count was off.. retran is not happening so do
10043 * the normal retransmission.
10045 #ifdef SCTP_AUDITING_ENABLED
10046 sctp_auditing(9, inp, stcb, NULL);
10048 if (ret == SCTP_RETRAN_EXIT) {
10053 if (from_where == SCTP_OUTPUT_FROM_T3) {
10054 /* Only one transmission allowed out of a timeout */
10055 #ifdef SCTP_AUDITING_ENABLED
10056 sctp_auditing(10, inp, stcb, NULL);
10058 /* Push out any control */
10059 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10060 &now, &now_filled, frag_point, so_locked);
10063 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10064 /* Hit FR burst limit */
10067 if ((num_out == 0) && (ret == 0)) {
10068 /* No more retrans to send */
10072 #ifdef SCTP_AUDITING_ENABLED
10073 sctp_auditing(12, inp, stcb, NULL);
10075 /* Check for bad destinations, if they exist move chunks around. */
10076 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10077 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10079 * if possible move things off of this address we
10080 * still may send below due to the dormant state but
10081 * we try to find an alternate address to send to
10082 * and if we have one we move all queued data on the
10083 * out wheel to this alternate address.
10085 if (net->ref_count > 1)
10086 sctp_move_chunks_from_net(stcb, net);
10089 * if ((asoc->sat_network) || (net->addr_is_local))
10090 * { burst_limit = asoc->max_burst *
10091 * SCTP_SAT_NETWORK_BURST_INCR; }
10093 if (asoc->max_burst > 0) {
10094 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10095 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10097 * JRS - Use the congestion
10098 * control given in the
10099 * congestion control module
10101 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10102 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10103 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10105 SCTP_STAT_INCR(sctps_maxburstqueued);
10107 net->fast_retran_ip = 0;
10109 if (net->flight_size == 0) {
10111 * Should be decaying the
10123 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10124 &reason_code, 0, from_where,
10125 &now, &now_filled, frag_point, so_locked);
10127 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10128 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10129 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10131 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10132 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10133 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10137 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10139 tot_out += num_out;
10141 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10142 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10143 if (num_out == 0) {
10144 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10149 * When the Nagle algorithm is used, look at how
10150 * much is unsent, then if its smaller than an MTU
10151 * and we have data in flight we stop, except if we
10152 * are handling a fragmented user message.
10154 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10155 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10156 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10157 (stcb->asoc.total_flight > 0) &&
10158 ((stcb->asoc.locked_on_sending == NULL) ||
10159 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10163 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10164 TAILQ_EMPTY(&asoc->send_queue) &&
10165 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10166 /* Nothing left to send */
10169 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10170 /* Nothing left to send */
10173 } while (num_out &&
10174 ((asoc->max_burst == 0) ||
10175 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10176 (burst_cnt < asoc->max_burst)));
10178 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10179 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10180 SCTP_STAT_INCR(sctps_maxburstqueued);
10181 asoc->burst_limit_applied = 1;
10182 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10183 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10186 asoc->burst_limit_applied = 0;
10189 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10190 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10192 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10196 * Now we need to clean up the control chunk chain if a ECNE is on
10197 * it. It must be marked as UNSENT again so next call will continue
10198 * to send it until such time that we get a CWR, to remove it.
10200 if (stcb->asoc.ecn_echo_cnt_onq)
10201 sctp_fix_ecn_echo(asoc);
10208 struct sctp_inpcb *inp,
10210 struct sockaddr *addr,
10211 struct mbuf *control,
10216 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10219 if (inp->sctp_socket == NULL) {
10220 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10223 return (sctp_sosend(inp->sctp_socket,
10225 (struct uio *)NULL,
10233 send_forward_tsn(struct sctp_tcb *stcb,
10234 struct sctp_association *asoc)
10236 struct sctp_tmit_chunk *chk;
10237 struct sctp_forward_tsn_chunk *fwdtsn;
10238 uint32_t advance_peer_ack_point;
10240 SCTP_TCB_LOCK_ASSERT(stcb);
10241 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10242 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10243 /* mark it to unsent */
10244 chk->sent = SCTP_DATAGRAM_UNSENT;
10245 chk->snd_count = 0;
10246 /* Do we correct its output location? */
10248 sctp_free_remote_addr(chk->whoTo);
10251 goto sctp_fill_in_rest;
10254 /* Ok if we reach here we must build one */
10255 sctp_alloc_a_chunk(stcb, chk);
10259 asoc->fwd_tsn_cnt++;
10260 chk->copy_by_ref = 0;
10261 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10262 chk->rec.chunk_id.can_take_data = 0;
10266 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10267 if (chk->data == NULL) {
10268 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10271 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10272 chk->sent = SCTP_DATAGRAM_UNSENT;
10273 chk->snd_count = 0;
10274 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10275 asoc->ctrl_queue_cnt++;
10278 * Here we go through and fill out the part that deals with
10279 * stream/seq of the ones we skip.
10281 SCTP_BUF_LEN(chk->data) = 0;
10283 struct sctp_tmit_chunk *at, *tp1, *last;
10284 struct sctp_strseq *strseq;
10285 unsigned int cnt_of_space, i, ovh;
10286 unsigned int space_needed;
10287 unsigned int cnt_of_skipped = 0;
10289 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10290 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10291 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10292 /* no more to look at */
10295 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10296 /* We don't report these */
10301 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10302 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10304 cnt_of_space = M_TRAILINGSPACE(chk->data);
10306 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10307 ovh = SCTP_MIN_OVERHEAD;
10309 ovh = SCTP_MIN_V4_OVERHEAD;
10311 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10312 /* trim to a mtu size */
10313 cnt_of_space = asoc->smallest_mtu - ovh;
10315 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10316 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10317 0xff, 0, cnt_of_skipped,
10318 asoc->advanced_peer_ack_point);
10321 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10322 if (cnt_of_space < space_needed) {
10324 * ok we must trim down the chunk by lowering the
10325 * advance peer ack point.
10327 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10328 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10329 0xff, 0xff, cnt_of_space,
10332 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10333 cnt_of_skipped /= sizeof(struct sctp_strseq);
10335 * Go through and find the TSN that will be the one
10338 at = TAILQ_FIRST(&asoc->sent_queue);
10340 for (i = 0; i < cnt_of_skipped; i++) {
10341 tp1 = TAILQ_NEXT(at, sctp_next);
10348 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10349 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10350 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10351 asoc->advanced_peer_ack_point);
10355 * last now points to last one I can report, update
10359 advance_peer_ack_point = last->rec.data.TSN_seq;
10360 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10361 cnt_of_skipped * sizeof(struct sctp_strseq);
10363 chk->send_size = space_needed;
10364 /* Setup the chunk */
10365 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10366 fwdtsn->ch.chunk_length = htons(chk->send_size);
10367 fwdtsn->ch.chunk_flags = 0;
10368 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10369 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10370 SCTP_BUF_LEN(chk->data) = chk->send_size;
10373 * Move pointer to after the fwdtsn and transfer to the
10376 strseq = (struct sctp_strseq *)fwdtsn;
10378 * Now populate the strseq list. This is done blindly
10379 * without pulling out duplicate stream info. This is
10380 * inefficent but won't harm the process since the peer will
10381 * look at these in sequence and will thus release anything.
10382 * It could mean we exceed the PMTU and chop off some that
10383 * we could have included.. but this is unlikely (aka 1432/4
10384 * would mean 300+ stream seq's would have to be reported in
10385 * one FWD-TSN. With a bit of work we can later FIX this to
10386 * optimize and pull out duplcates.. but it does add more
10387 * overhead. So for now... not!
10389 at = TAILQ_FIRST(&asoc->sent_queue);
10390 for (i = 0; i < cnt_of_skipped; i++) {
10391 tp1 = TAILQ_NEXT(at, sctp_next);
10394 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10395 /* We don't report these */
10400 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10401 at->rec.data.fwd_tsn_cnt = 0;
10403 strseq->stream = ntohs(at->rec.data.stream_number);
10404 strseq->sequence = ntohs(at->rec.data.stream_seq);
10413 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10414 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10420 * Queue up a SACK or NR-SACK in the control queue.
10421 * We must first check to see if a SACK or NR-SACK is
10422 * somehow on the control queue.
10423 * If so, we will take and and remove the old one.
10425 struct sctp_association *asoc;
10426 struct sctp_tmit_chunk *chk, *a_chk;
10427 struct sctp_sack_chunk *sack;
10428 struct sctp_nr_sack_chunk *nr_sack;
10429 struct sctp_gap_ack_block *gap_descriptor;
10430 struct sack_track *selector;
10435 int limit_reached = 0;
10436 unsigned int i, siz, j;
10437 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10440 uint32_t highest_tsn;
10445 if (stcb->asoc.nrsack_supported == 1) {
10446 type = SCTP_NR_SELECTIVE_ACK;
10448 type = SCTP_SELECTIVE_ACK;
10451 asoc = &stcb->asoc;
10452 SCTP_TCB_LOCK_ASSERT(stcb);
10453 if (asoc->last_data_chunk_from == NULL) {
10454 /* Hmm we never received anything */
10457 sctp_slide_mapping_arrays(stcb);
10458 sctp_set_rwnd(stcb, asoc);
10459 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10460 if (chk->rec.chunk_id.id == type) {
10461 /* Hmm, found a sack already on queue, remove it */
10462 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10463 asoc->ctrl_queue_cnt--;
10466 sctp_m_freem(a_chk->data);
10467 a_chk->data = NULL;
10469 if (a_chk->whoTo) {
10470 sctp_free_remote_addr(a_chk->whoTo);
10471 a_chk->whoTo = NULL;
10476 if (a_chk == NULL) {
10477 sctp_alloc_a_chunk(stcb, a_chk);
10478 if (a_chk == NULL) {
10479 /* No memory so we drop the idea, and set a timer */
10480 if (stcb->asoc.delayed_ack) {
10481 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10482 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10483 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10484 stcb->sctp_ep, stcb, NULL);
10486 stcb->asoc.send_sack = 1;
10490 a_chk->copy_by_ref = 0;
10491 a_chk->rec.chunk_id.id = type;
10492 a_chk->rec.chunk_id.can_take_data = 1;
10494 /* Clear our pkt counts */
10495 asoc->data_pkts_seen = 0;
10498 a_chk->asoc = asoc;
10499 a_chk->snd_count = 0;
10500 a_chk->send_size = 0; /* fill in later */
10501 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10502 a_chk->whoTo = NULL;
10504 if ((asoc->numduptsns) ||
10505 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10507 * Ok, we have some duplicates or the destination for the
10508 * sack is unreachable, lets see if we can select an
10509 * alternate than asoc->last_data_chunk_from
10511 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10512 (asoc->used_alt_onsack > asoc->numnets)) {
10513 /* We used an alt last time, don't this time */
10514 a_chk->whoTo = NULL;
10516 asoc->used_alt_onsack++;
10517 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10519 if (a_chk->whoTo == NULL) {
10520 /* Nope, no alternate */
10521 a_chk->whoTo = asoc->last_data_chunk_from;
10522 asoc->used_alt_onsack = 0;
10526 * No duplicates so we use the last place we received data
10529 asoc->used_alt_onsack = 0;
10530 a_chk->whoTo = asoc->last_data_chunk_from;
10532 if (a_chk->whoTo) {
10533 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10535 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10536 highest_tsn = asoc->highest_tsn_inside_map;
10538 highest_tsn = asoc->highest_tsn_inside_nr_map;
10540 if (highest_tsn == asoc->cumulative_tsn) {
10542 if (type == SCTP_SELECTIVE_ACK) {
10543 space_req = sizeof(struct sctp_sack_chunk);
10545 space_req = sizeof(struct sctp_nr_sack_chunk);
10548 /* gaps get a cluster */
10549 space_req = MCLBYTES;
10551 /* Ok now lets formulate a MBUF with our sack */
10552 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10553 if ((a_chk->data == NULL) ||
10554 (a_chk->whoTo == NULL)) {
10555 /* rats, no mbuf memory */
10557 /* was a problem with the destination */
10558 sctp_m_freem(a_chk->data);
10559 a_chk->data = NULL;
10561 sctp_free_a_chunk(stcb, a_chk, so_locked);
10562 /* sa_ignore NO_NULL_CHK */
10563 if (stcb->asoc.delayed_ack) {
10564 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10565 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10566 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10567 stcb->sctp_ep, stcb, NULL);
10569 stcb->asoc.send_sack = 1;
10573 /* ok, lets go through and fill it in */
10574 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10575 space = M_TRAILINGSPACE(a_chk->data);
10576 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10577 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10579 limit = mtod(a_chk->data, caddr_t);
10584 if ((asoc->sctp_cmt_on_off > 0) &&
10585 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10587 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10588 * received, then set high bit to 1, else 0. Reset
10591 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10592 asoc->cmt_dac_pkts_rcvd = 0;
10594 #ifdef SCTP_ASOCLOG_OF_TSNS
10595 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10596 stcb->asoc.cumack_log_atsnt++;
10597 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10598 stcb->asoc.cumack_log_atsnt = 0;
10601 /* reset the readers interpretation */
10602 stcb->freed_by_sorcv_sincelast = 0;
10604 if (type == SCTP_SELECTIVE_ACK) {
10605 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10607 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10608 if (highest_tsn > asoc->mapping_array_base_tsn) {
10609 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10611 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10615 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10616 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10617 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10618 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10620 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10624 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10627 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10629 if (((type == SCTP_SELECTIVE_ACK) &&
10630 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10631 ((type == SCTP_NR_SELECTIVE_ACK) &&
10632 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10633 /* we have a gap .. maybe */
10634 for (i = 0; i < siz; i++) {
10635 tsn_map = asoc->mapping_array[i];
10636 if (type == SCTP_SELECTIVE_ACK) {
10637 tsn_map |= asoc->nr_mapping_array[i];
10641 * Clear all bits corresponding to TSNs
10642 * smaller or equal to the cumulative TSN.
10644 tsn_map &= (~0 << (1 - offset));
10646 selector = &sack_array[tsn_map];
10647 if (mergeable && selector->right_edge) {
10649 * Backup, left and right edges were ok to
10655 if (selector->num_entries == 0)
10658 for (j = 0; j < selector->num_entries; j++) {
10659 if (mergeable && selector->right_edge) {
10661 * do a merge by NOT setting
10667 * no merge, set the left
10671 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10673 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10676 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10682 if (selector->left_edge) {
10686 if (limit_reached) {
10687 /* Reached the limit stop */
10693 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10694 (limit_reached == 0)) {
10698 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10699 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10701 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10704 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10707 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10709 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10710 /* we have a gap .. maybe */
10711 for (i = 0; i < siz; i++) {
10712 tsn_map = asoc->nr_mapping_array[i];
10715 * Clear all bits corresponding to
10716 * TSNs smaller or equal to the
10719 tsn_map &= (~0 << (1 - offset));
10721 selector = &sack_array[tsn_map];
10722 if (mergeable && selector->right_edge) {
10724 * Backup, left and right edges were
10727 num_nr_gap_blocks--;
10730 if (selector->num_entries == 0)
10733 for (j = 0; j < selector->num_entries; j++) {
10734 if (mergeable && selector->right_edge) {
10736 * do a merge by NOT
10743 * no merge, set the
10747 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10749 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10750 num_nr_gap_blocks++;
10752 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10758 if (selector->left_edge) {
10762 if (limit_reached) {
10763 /* Reached the limit stop */
10770 /* now we must add any dups we are going to report. */
10771 if ((limit_reached == 0) && (asoc->numduptsns)) {
10772 dup = (uint32_t *) gap_descriptor;
10773 for (i = 0; i < asoc->numduptsns; i++) {
10774 *dup = htonl(asoc->dup_tsns[i]);
10777 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10782 asoc->numduptsns = 0;
10785 * now that the chunk is prepared queue it to the control chunk
10788 if (type == SCTP_SELECTIVE_ACK) {
10789 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10790 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10791 num_dups * sizeof(int32_t);
10792 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10793 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10794 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10795 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10796 sack->sack.num_dup_tsns = htons(num_dups);
10797 sack->ch.chunk_type = type;
10798 sack->ch.chunk_flags = flags;
10799 sack->ch.chunk_length = htons(a_chk->send_size);
10801 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10802 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10803 num_dups * sizeof(int32_t);
10804 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10805 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10806 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10807 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10808 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10809 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10810 nr_sack->nr_sack.reserved = 0;
10811 nr_sack->ch.chunk_type = type;
10812 nr_sack->ch.chunk_flags = flags;
10813 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10815 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10816 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10817 asoc->ctrl_queue_cnt++;
10818 asoc->send_sack = 0;
10819 SCTP_STAT_INCR(sctps_sendsacks);
10824 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10825 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10830 struct mbuf *m_abort, *m, *m_last;
10831 struct mbuf *m_out, *m_end = NULL;
10832 struct sctp_abort_chunk *abort;
10833 struct sctp_auth_chunk *auth = NULL;
10834 struct sctp_nets *net;
10836 uint32_t auth_offset = 0;
10837 uint16_t cause_len, chunk_len, padding_len;
10839 SCTP_TCB_LOCK_ASSERT(stcb);
10841 * Add an AUTH chunk, if chunk requires it and save the offset into
10842 * the chain for AUTH
10844 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10845 stcb->asoc.peer_auth_chunks)) {
10846 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10847 stcb, SCTP_ABORT_ASSOCIATION);
10848 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10852 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10853 if (m_abort == NULL) {
10855 sctp_m_freem(m_out);
10858 sctp_m_freem(operr);
10862 /* link in any error */
10863 SCTP_BUF_NEXT(m_abort) = operr;
10866 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10867 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10868 if (SCTP_BUF_NEXT(m) == NULL) {
10872 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10873 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10874 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10875 if (m_out == NULL) {
10876 /* NO Auth chunk prepended, so reserve space in front */
10877 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10880 /* Put AUTH chunk at the front of the chain */
10881 SCTP_BUF_NEXT(m_end) = m_abort;
10883 if (stcb->asoc.alternate) {
10884 net = stcb->asoc.alternate;
10886 net = stcb->asoc.primary_destination;
10888 /* Fill in the ABORT chunk header. */
10889 abort = mtod(m_abort, struct sctp_abort_chunk *);
10890 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10891 if (stcb->asoc.peer_vtag == 0) {
10892 /* This happens iff the assoc is in COOKIE-WAIT state. */
10893 vtag = stcb->asoc.my_vtag;
10894 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10896 vtag = stcb->asoc.peer_vtag;
10897 abort->ch.chunk_flags = 0;
10899 abort->ch.chunk_length = htons(chunk_len);
10900 /* Add padding, if necessary. */
10901 if (padding_len > 0) {
10902 if ((m_last == NULL) ||
10903 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10904 sctp_m_freem(m_out);
10908 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10909 (struct sockaddr *)&net->ro._l_addr,
10910 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10911 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10912 stcb->asoc.primary_destination->port, NULL,
10915 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10919 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10920 struct sctp_nets *net,
10923 /* formulate and SEND a SHUTDOWN-COMPLETE */
10924 struct mbuf *m_shutdown_comp;
10925 struct sctp_shutdown_complete_chunk *shutdown_complete;
10929 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10930 if (m_shutdown_comp == NULL) {
10934 if (reflect_vtag) {
10935 flags = SCTP_HAD_NO_TCB;
10936 vtag = stcb->asoc.my_vtag;
10939 vtag = stcb->asoc.peer_vtag;
10941 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10942 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10943 shutdown_complete->ch.chunk_flags = flags;
10944 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10945 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10946 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10947 (struct sockaddr *)&net->ro._l_addr,
10948 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10949 stcb->sctp_ep->sctp_lport, stcb->rport,
10953 SCTP_SO_NOT_LOCKED);
10954 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10959 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10960 struct sctphdr *sh, uint32_t vtag,
10961 uint8_t type, struct mbuf *cause,
10962 uint8_t use_mflowid, uint32_t mflowid,
10963 uint32_t vrf_id, uint16_t port)
10965 struct mbuf *o_pak;
10967 struct sctphdr *shout;
10968 struct sctp_chunkhdr *ch;
10970 #if defined(INET) || defined(INET6)
10971 struct udphdr *udp;
10975 int len, cause_len, padding_len;
10978 struct sockaddr_in *src_sin, *dst_sin;
10983 struct sockaddr_in6 *src_sin6, *dst_sin6;
10984 struct ip6_hdr *ip6;
10988 /* Compute the length of the cause and add final padding. */
10990 if (cause != NULL) {
10991 struct mbuf *m_at, *m_last = NULL;
10993 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10994 if (SCTP_BUF_NEXT(m_at) == NULL)
10996 cause_len += SCTP_BUF_LEN(m_at);
10998 padding_len = cause_len % 4;
10999 if (padding_len != 0) {
11000 padding_len = 4 - padding_len;
11002 if (padding_len != 0) {
11003 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
11004 sctp_m_freem(cause);
11011 /* Get an mbuf for the header. */
11012 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
11013 switch (dst->sa_family) {
11016 len += sizeof(struct ip);
11021 len += sizeof(struct ip6_hdr);
11027 #if defined(INET) || defined(INET6)
11029 len += sizeof(struct udphdr);
11032 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11033 if (mout == NULL) {
11035 sctp_m_freem(cause);
11039 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11040 SCTP_BUF_LEN(mout) = len;
11041 SCTP_BUF_NEXT(mout) = cause;
11042 if (use_mflowid != 0) {
11043 mout->m_pkthdr.flowid = mflowid;
11044 mout->m_flags |= M_FLOWID;
11052 switch (dst->sa_family) {
11055 src_sin = (struct sockaddr_in *)src;
11056 dst_sin = (struct sockaddr_in *)dst;
11057 ip = mtod(mout, struct ip *);
11058 ip->ip_v = IPVERSION;
11059 ip->ip_hl = (sizeof(struct ip) >> 2);
11061 ip->ip_id = ip_newid();
11063 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11065 ip->ip_p = IPPROTO_UDP;
11067 ip->ip_p = IPPROTO_SCTP;
11069 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11070 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11072 len = sizeof(struct ip);
11073 shout = (struct sctphdr *)((caddr_t)ip + len);
11078 src_sin6 = (struct sockaddr_in6 *)src;
11079 dst_sin6 = (struct sockaddr_in6 *)dst;
11080 ip6 = mtod(mout, struct ip6_hdr *);
11081 ip6->ip6_flow = htonl(0x60000000);
11082 if (V_ip6_auto_flowlabel) {
11083 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11085 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11087 ip6->ip6_nxt = IPPROTO_UDP;
11089 ip6->ip6_nxt = IPPROTO_SCTP;
11091 ip6->ip6_src = dst_sin6->sin6_addr;
11092 ip6->ip6_dst = src_sin6->sin6_addr;
11093 len = sizeof(struct ip6_hdr);
11094 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11099 shout = mtod(mout, struct sctphdr *);
11102 #if defined(INET) || defined(INET6)
11104 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11105 sctp_m_freem(mout);
11108 udp = (struct udphdr *)shout;
11109 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11110 udp->uh_dport = port;
11112 udp->uh_ulen = htons(sizeof(struct udphdr) +
11113 sizeof(struct sctphdr) +
11114 sizeof(struct sctp_chunkhdr) +
11115 cause_len + padding_len);
11116 len += sizeof(struct udphdr);
11117 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11122 shout->src_port = sh->dest_port;
11123 shout->dest_port = sh->src_port;
11124 shout->checksum = 0;
11126 shout->v_tag = htonl(vtag);
11128 shout->v_tag = sh->v_tag;
11130 len += sizeof(struct sctphdr);
11131 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11132 ch->chunk_type = type;
11134 ch->chunk_flags = 0;
11136 ch->chunk_flags = SCTP_HAD_NO_TCB;
11138 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11139 len += sizeof(struct sctp_chunkhdr);
11140 len += cause_len + padding_len;
11142 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11143 sctp_m_freem(mout);
11146 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11147 switch (dst->sa_family) {
11152 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11157 ip->ip_len = htons(len);
11159 #if defined(SCTP_WITH_NO_CSUM)
11160 SCTP_STAT_INCR(sctps_sendnocrc);
11162 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11163 SCTP_STAT_INCR(sctps_sendswcrc);
11166 SCTP_ENABLE_UDP_CSUM(o_pak);
11169 #if defined(SCTP_WITH_NO_CSUM)
11170 SCTP_STAT_INCR(sctps_sendnocrc);
11172 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11173 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11174 SCTP_STAT_INCR(sctps_sendhwcrc);
11177 #ifdef SCTP_PACKET_LOGGING
11178 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11179 sctp_packet_log(o_pak);
11182 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11187 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11189 #if defined(SCTP_WITH_NO_CSUM)
11190 SCTP_STAT_INCR(sctps_sendnocrc);
11192 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11193 SCTP_STAT_INCR(sctps_sendswcrc);
11195 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11196 udp->uh_sum = 0xffff;
11199 #if defined(SCTP_WITH_NO_CSUM)
11200 SCTP_STAT_INCR(sctps_sendnocrc);
11202 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11203 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11204 SCTP_STAT_INCR(sctps_sendhwcrc);
11207 #ifdef SCTP_PACKET_LOGGING
11208 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11209 sctp_packet_log(o_pak);
11212 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11216 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11218 sctp_m_freem(mout);
11219 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11222 SCTP_STAT_INCR(sctps_sendpackets);
11223 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11224 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11229 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11230 struct sctphdr *sh,
11231 uint8_t use_mflowid, uint32_t mflowid,
11232 uint32_t vrf_id, uint16_t port)
11234 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11235 use_mflowid, mflowid,
11240 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11241 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11246 struct sctp_tmit_chunk *chk;
11247 struct sctp_heartbeat_chunk *hb;
11248 struct timeval now;
11250 SCTP_TCB_LOCK_ASSERT(stcb);
11254 (void)SCTP_GETTIME_TIMEVAL(&now);
11255 switch (net->ro._l_addr.sa.sa_family) {
11267 sctp_alloc_a_chunk(stcb, chk);
11269 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11272 chk->copy_by_ref = 0;
11273 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11274 chk->rec.chunk_id.can_take_data = 1;
11276 chk->asoc = &stcb->asoc;
11277 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11279 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11280 if (chk->data == NULL) {
11281 sctp_free_a_chunk(stcb, chk, so_locked);
11284 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11285 SCTP_BUF_LEN(chk->data) = chk->send_size;
11286 chk->sent = SCTP_DATAGRAM_UNSENT;
11287 chk->snd_count = 0;
11289 atomic_add_int(&chk->whoTo->ref_count, 1);
11290 /* Now we have a mbuf that we can fill in with the details */
11291 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11292 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11293 /* fill out chunk header */
11294 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11295 hb->ch.chunk_flags = 0;
11296 hb->ch.chunk_length = htons(chk->send_size);
11297 /* Fill out hb parameter */
11298 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11299 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11300 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11301 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11302 /* Did our user request this one, put it in */
11303 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11304 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11305 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11307 * we only take from the entropy pool if the address is not
11310 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11311 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11313 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11314 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11316 switch (net->ro._l_addr.sa.sa_family) {
11319 memcpy(hb->heartbeat.hb_info.address,
11320 &net->ro._l_addr.sin.sin_addr,
11321 sizeof(net->ro._l_addr.sin.sin_addr));
11326 memcpy(hb->heartbeat.hb_info.address,
11327 &net->ro._l_addr.sin6.sin6_addr,
11328 sizeof(net->ro._l_addr.sin6.sin6_addr));
11335 net->hb_responded = 0;
11336 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11337 stcb->asoc.ctrl_queue_cnt++;
11338 SCTP_STAT_INCR(sctps_sendheartbeat);
11343 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11346 struct sctp_association *asoc;
11347 struct sctp_ecne_chunk *ecne;
11348 struct sctp_tmit_chunk *chk;
11353 asoc = &stcb->asoc;
11354 SCTP_TCB_LOCK_ASSERT(stcb);
11355 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11356 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11357 /* found a previous ECN_ECHO update it if needed */
11358 uint32_t cnt, ctsn;
11360 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11361 ctsn = ntohl(ecne->tsn);
11362 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11363 ecne->tsn = htonl(high_tsn);
11364 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11366 cnt = ntohl(ecne->num_pkts_since_cwr);
11368 ecne->num_pkts_since_cwr = htonl(cnt);
11372 /* nope could not find one to update so we must build one */
11373 sctp_alloc_a_chunk(stcb, chk);
11377 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11378 chk->copy_by_ref = 0;
11379 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11380 chk->rec.chunk_id.can_take_data = 0;
11382 chk->asoc = &stcb->asoc;
11383 chk->send_size = sizeof(struct sctp_ecne_chunk);
11384 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11385 if (chk->data == NULL) {
11386 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11389 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11390 SCTP_BUF_LEN(chk->data) = chk->send_size;
11391 chk->sent = SCTP_DATAGRAM_UNSENT;
11392 chk->snd_count = 0;
11394 atomic_add_int(&chk->whoTo->ref_count, 1);
11396 stcb->asoc.ecn_echo_cnt_onq++;
11397 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11398 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11399 ecne->ch.chunk_flags = 0;
11400 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11401 ecne->tsn = htonl(high_tsn);
11402 ecne->num_pkts_since_cwr = htonl(1);
11403 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11404 asoc->ctrl_queue_cnt++;
11408 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11409 struct mbuf *m, int len, int iphlen, int bad_crc)
11411 struct sctp_association *asoc;
11412 struct sctp_pktdrop_chunk *drp;
11413 struct sctp_tmit_chunk *chk;
11419 struct sctp_chunkhdr *ch, chunk_buf;
11420 unsigned int chk_length;
11425 asoc = &stcb->asoc;
11426 SCTP_TCB_LOCK_ASSERT(stcb);
11427 if (asoc->pktdrop_supported == 0) {
11429 * peer must declare support before I send one.
11433 if (stcb->sctp_socket == NULL) {
11436 sctp_alloc_a_chunk(stcb, chk);
11440 chk->copy_by_ref = 0;
11441 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11442 chk->rec.chunk_id.can_take_data = 1;
11445 chk->send_size = len;
11446 /* Validate that we do not have an ABORT in here. */
11447 offset = iphlen + sizeof(struct sctphdr);
11448 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11449 sizeof(*ch), (uint8_t *) & chunk_buf);
11450 while (ch != NULL) {
11451 chk_length = ntohs(ch->chunk_length);
11452 if (chk_length < sizeof(*ch)) {
11453 /* break to abort land */
11456 switch (ch->chunk_type) {
11457 case SCTP_PACKET_DROPPED:
11458 case SCTP_ABORT_ASSOCIATION:
11459 case SCTP_INITIATION_ACK:
11461 * We don't respond with an PKT-DROP to an ABORT
11462 * or PKT-DROP. We also do not respond to an
11463 * INIT-ACK, because we can't know if the initiation
11464 * tag is correct or not.
11466 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11471 offset += SCTP_SIZE32(chk_length);
11472 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11473 sizeof(*ch), (uint8_t *) & chunk_buf);
11476 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11477 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11479 * only send 1 mtu worth, trim off the excess on the end.
11482 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11485 chk->asoc = &stcb->asoc;
11486 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11487 if (chk->data == NULL) {
11489 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11492 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11493 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11495 sctp_m_freem(chk->data);
11499 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11500 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11501 chk->book_size_scale = 0;
11503 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11504 drp->trunc_len = htons(fullsz);
11506 * Len is already adjusted to size minus overhead above take
11507 * out the pkt_drop chunk itself from it.
11509 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11510 len = chk->send_size;
11512 /* no truncation needed */
11513 drp->ch.chunk_flags = 0;
11514 drp->trunc_len = htons(0);
11517 drp->ch.chunk_flags |= SCTP_BADCRC;
11519 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11520 SCTP_BUF_LEN(chk->data) = chk->send_size;
11521 chk->sent = SCTP_DATAGRAM_UNSENT;
11522 chk->snd_count = 0;
11524 /* we should hit here */
11526 atomic_add_int(&chk->whoTo->ref_count, 1);
11530 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11531 drp->ch.chunk_length = htons(chk->send_size);
11532 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11536 drp->bottle_bw = htonl(spc);
11537 if (asoc->my_rwnd) {
11538 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11539 asoc->size_on_all_streams +
11540 asoc->my_rwnd_control_len +
11541 stcb->sctp_socket->so_rcv.sb_cc);
11544 * If my rwnd is 0, possibly from mbuf depletion as well as
11545 * space used, tell the peer there is NO space aka onq == bw
11547 drp->current_onq = htonl(spc);
11551 m_copydata(m, iphlen, len, (caddr_t)datap);
11552 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11553 asoc->ctrl_queue_cnt++;
11557 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11559 struct sctp_association *asoc;
11560 struct sctp_cwr_chunk *cwr;
11561 struct sctp_tmit_chunk *chk;
11563 SCTP_TCB_LOCK_ASSERT(stcb);
11567 asoc = &stcb->asoc;
11568 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11569 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11571 * found a previous CWR queued to same destination
11572 * update it if needed
11576 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11577 ctsn = ntohl(cwr->tsn);
11578 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11579 cwr->tsn = htonl(high_tsn);
11581 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11582 /* Make sure override is carried */
11583 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11588 sctp_alloc_a_chunk(stcb, chk);
11592 chk->copy_by_ref = 0;
11593 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11594 chk->rec.chunk_id.can_take_data = 1;
11596 chk->asoc = &stcb->asoc;
11597 chk->send_size = sizeof(struct sctp_cwr_chunk);
11598 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11599 if (chk->data == NULL) {
11600 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11603 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11604 SCTP_BUF_LEN(chk->data) = chk->send_size;
11605 chk->sent = SCTP_DATAGRAM_UNSENT;
11606 chk->snd_count = 0;
11608 atomic_add_int(&chk->whoTo->ref_count, 1);
11609 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11610 cwr->ch.chunk_type = SCTP_ECN_CWR;
11611 cwr->ch.chunk_flags = override;
11612 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11613 cwr->tsn = htonl(high_tsn);
11614 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11615 asoc->ctrl_queue_cnt++;
11619 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11620 int number_entries, uint16_t * list,
11621 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11623 uint16_t len, old_len, i;
11624 struct sctp_stream_reset_out_request *req_out;
11625 struct sctp_chunkhdr *ch;
11627 ch = mtod(chk->data, struct sctp_chunkhdr *);
11628 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11630 /* get to new offset for the param. */
11631 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11632 /* now how long will this param be? */
11633 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11634 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11635 req_out->ph.param_length = htons(len);
11636 req_out->request_seq = htonl(seq);
11637 req_out->response_seq = htonl(resp_seq);
11638 req_out->send_reset_at_tsn = htonl(last_sent);
11639 if (number_entries) {
11640 for (i = 0; i < number_entries; i++) {
11641 req_out->list_of_streams[i] = htons(list[i]);
11644 if (SCTP_SIZE32(len) > len) {
11646 * Need to worry about the pad we may end up adding to the
11647 * end. This is easy since the struct is either aligned to 4
11648 * bytes or 2 bytes off.
11650 req_out->list_of_streams[number_entries] = 0;
11652 /* now fix the chunk length */
11653 ch->chunk_length = htons(len + old_len);
11654 chk->book_size = len + old_len;
11655 chk->book_size_scale = 0;
11656 chk->send_size = SCTP_SIZE32(chk->book_size);
11657 SCTP_BUF_LEN(chk->data) = chk->send_size;
11662 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11663 int number_entries, uint16_t * list,
11666 uint16_t len, old_len, i;
11667 struct sctp_stream_reset_in_request *req_in;
11668 struct sctp_chunkhdr *ch;
11670 ch = mtod(chk->data, struct sctp_chunkhdr *);
11671 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11673 /* get to new offset for the param. */
11674 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11675 /* now how long will this param be? */
11676 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11677 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11678 req_in->ph.param_length = htons(len);
11679 req_in->request_seq = htonl(seq);
11680 if (number_entries) {
11681 for (i = 0; i < number_entries; i++) {
11682 req_in->list_of_streams[i] = htons(list[i]);
11685 if (SCTP_SIZE32(len) > len) {
11687 * Need to worry about the pad we may end up adding to the
11688 * end. This is easy since the struct is either aligned to 4
11689 * bytes or 2 bytes off.
11691 req_in->list_of_streams[number_entries] = 0;
11693 /* now fix the chunk length */
11694 ch->chunk_length = htons(len + old_len);
11695 chk->book_size = len + old_len;
11696 chk->book_size_scale = 0;
11697 chk->send_size = SCTP_SIZE32(chk->book_size);
11698 SCTP_BUF_LEN(chk->data) = chk->send_size;
11703 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11706 uint16_t len, old_len;
11707 struct sctp_stream_reset_tsn_request *req_tsn;
11708 struct sctp_chunkhdr *ch;
11710 ch = mtod(chk->data, struct sctp_chunkhdr *);
11711 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11713 /* get to new offset for the param. */
11714 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11715 /* now how long will this param be? */
11716 len = sizeof(struct sctp_stream_reset_tsn_request);
11717 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11718 req_tsn->ph.param_length = htons(len);
11719 req_tsn->request_seq = htonl(seq);
11721 /* now fix the chunk length */
11722 ch->chunk_length = htons(len + old_len);
11723 chk->send_size = len + old_len;
11724 chk->book_size = SCTP_SIZE32(chk->send_size);
11725 chk->book_size_scale = 0;
11726 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11731 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11732 uint32_t resp_seq, uint32_t result)
11734 uint16_t len, old_len;
11735 struct sctp_stream_reset_response *resp;
11736 struct sctp_chunkhdr *ch;
11738 ch = mtod(chk->data, struct sctp_chunkhdr *);
11739 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11741 /* get to new offset for the param. */
11742 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11743 /* now how long will this param be? */
11744 len = sizeof(struct sctp_stream_reset_response);
11745 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11746 resp->ph.param_length = htons(len);
11747 resp->response_seq = htonl(resp_seq);
11748 resp->result = ntohl(result);
11750 /* now fix the chunk length */
11751 ch->chunk_length = htons(len + old_len);
11752 chk->book_size = len + old_len;
11753 chk->book_size_scale = 0;
11754 chk->send_size = SCTP_SIZE32(chk->book_size);
11755 SCTP_BUF_LEN(chk->data) = chk->send_size;
11760 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11761 uint32_t resp_seq, uint32_t result,
11762 uint32_t send_una, uint32_t recv_next)
11764 uint16_t len, old_len;
11765 struct sctp_stream_reset_response_tsn *resp;
11766 struct sctp_chunkhdr *ch;
11768 ch = mtod(chk->data, struct sctp_chunkhdr *);
11769 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11771 /* get to new offset for the param. */
11772 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11773 /* now how long will this param be? */
11774 len = sizeof(struct sctp_stream_reset_response_tsn);
11775 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11776 resp->ph.param_length = htons(len);
11777 resp->response_seq = htonl(resp_seq);
11778 resp->result = htonl(result);
11779 resp->senders_next_tsn = htonl(send_una);
11780 resp->receivers_next_tsn = htonl(recv_next);
11782 /* now fix the chunk length */
11783 ch->chunk_length = htons(len + old_len);
11784 chk->book_size = len + old_len;
11785 chk->send_size = SCTP_SIZE32(chk->book_size);
11786 chk->book_size_scale = 0;
11787 SCTP_BUF_LEN(chk->data) = chk->send_size;
11792 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11796 uint16_t len, old_len;
11797 struct sctp_chunkhdr *ch;
11798 struct sctp_stream_reset_add_strm *addstr;
11800 ch = mtod(chk->data, struct sctp_chunkhdr *);
11801 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11803 /* get to new offset for the param. */
11804 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11805 /* now how long will this param be? */
11806 len = sizeof(struct sctp_stream_reset_add_strm);
11809 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11810 addstr->ph.param_length = htons(len);
11811 addstr->request_seq = htonl(seq);
11812 addstr->number_of_streams = htons(adding);
11813 addstr->reserved = 0;
11815 /* now fix the chunk length */
11816 ch->chunk_length = htons(len + old_len);
11817 chk->send_size = len + old_len;
11818 chk->book_size = SCTP_SIZE32(chk->send_size);
11819 chk->book_size_scale = 0;
11820 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11825 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11829 uint16_t len, old_len;
11830 struct sctp_chunkhdr *ch;
11831 struct sctp_stream_reset_add_strm *addstr;
11833 ch = mtod(chk->data, struct sctp_chunkhdr *);
11834 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11836 /* get to new offset for the param. */
11837 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11838 /* now how long will this param be? */
11839 len = sizeof(struct sctp_stream_reset_add_strm);
11841 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11842 addstr->ph.param_length = htons(len);
11843 addstr->request_seq = htonl(seq);
11844 addstr->number_of_streams = htons(adding);
11845 addstr->reserved = 0;
11847 /* now fix the chunk length */
11848 ch->chunk_length = htons(len + old_len);
11849 chk->send_size = len + old_len;
11850 chk->book_size = SCTP_SIZE32(chk->send_size);
11851 chk->book_size_scale = 0;
11852 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11857 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11858 uint16_t number_entries, uint16_t * list,
11859 uint8_t send_out_req,
11860 uint8_t send_in_req,
11861 uint8_t send_tsn_req,
11862 uint8_t add_stream,
11864 uint16_t adding_i, uint8_t peer_asked)
11867 struct sctp_association *asoc;
11868 struct sctp_tmit_chunk *chk;
11869 struct sctp_chunkhdr *ch;
11872 asoc = &stcb->asoc;
11873 if (asoc->stream_reset_outstanding) {
11875 * Already one pending, must get ACK back to clear the flag.
11877 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11880 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11881 (add_stream == 0)) {
11882 /* nothing to do */
11883 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11886 if (send_tsn_req && (send_out_req || send_in_req)) {
11887 /* error, can't do that */
11888 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11891 if (number_entries > (MCLBYTES -
11892 SCTP_MIN_OVERHEAD -
11893 sizeof(struct sctp_chunkhdr) -
11894 sizeof(struct sctp_stream_reset_out_request)) /
11895 sizeof(uint16_t)) {
11896 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11899 sctp_alloc_a_chunk(stcb, chk);
11901 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11904 chk->copy_by_ref = 0;
11905 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11906 chk->rec.chunk_id.can_take_data = 0;
11908 chk->asoc = &stcb->asoc;
11909 chk->book_size = sizeof(struct sctp_chunkhdr);
11910 chk->send_size = SCTP_SIZE32(chk->book_size);
11911 chk->book_size_scale = 0;
11913 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11914 if (chk->data == NULL) {
11915 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11916 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11919 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11921 /* setup chunk parameters */
11922 chk->sent = SCTP_DATAGRAM_UNSENT;
11923 chk->snd_count = 0;
11924 if (stcb->asoc.alternate) {
11925 chk->whoTo = stcb->asoc.alternate;
11927 chk->whoTo = stcb->asoc.primary_destination;
11929 atomic_add_int(&chk->whoTo->ref_count, 1);
11930 ch = mtod(chk->data, struct sctp_chunkhdr *);
11931 ch->chunk_type = SCTP_STREAM_RESET;
11932 ch->chunk_flags = 0;
11933 ch->chunk_length = htons(chk->book_size);
11934 SCTP_BUF_LEN(chk->data) = chk->send_size;
11936 seq = stcb->asoc.str_reset_seq_out;
11937 if (send_out_req) {
11938 sctp_add_stream_reset_out(chk, number_entries, list,
11939 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11940 asoc->stream_reset_out_is_outstanding = 1;
11942 asoc->stream_reset_outstanding++;
11944 if ((add_stream & 1) &&
11945 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11946 /* Need to allocate more */
11947 struct sctp_stream_out *oldstream;
11948 struct sctp_stream_queue_pending *sp, *nsp;
11951 #if defined(SCTP_DETAILED_STR_STATS)
11956 oldstream = stcb->asoc.strmout;
11957 /* get some more */
11958 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11959 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11961 if (stcb->asoc.strmout == NULL) {
11964 stcb->asoc.strmout = oldstream;
11965 /* Turn off the bit */
11966 x = add_stream & 0xfe;
11971 * Ok now we proceed with copying the old out stuff and
11972 * initializing the new stuff.
11974 SCTP_TCB_SEND_LOCK(stcb);
11975 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11976 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11977 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11978 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11979 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11980 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11981 stcb->asoc.strmout[i].stream_no = i;
11982 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11983 /* now anything on those queues? */
11984 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11985 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11986 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11988 /* Now move assoc pointers too */
11989 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11990 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11992 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11993 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11996 /* now the new streams */
11997 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11998 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11999 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12000 stcb->asoc.strmout[i].chunks_on_queues = 0;
12001 #if defined(SCTP_DETAILED_STR_STATS)
12002 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12003 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12004 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12007 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12008 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12010 stcb->asoc.strmout[i].next_sequence_send = 0x0;
12011 stcb->asoc.strmout[i].stream_no = i;
12012 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12013 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12015 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12016 SCTP_FREE(oldstream, SCTP_M_STRMO);
12017 SCTP_TCB_SEND_UNLOCK(stcb);
12020 if ((add_stream & 1) && (adding_o > 0)) {
12021 asoc->strm_pending_add_size = adding_o;
12022 asoc->peer_req_out = peer_asked;
12023 sctp_add_an_out_stream(chk, seq, adding_o);
12025 asoc->stream_reset_outstanding++;
12027 if ((add_stream & 2) && (adding_i > 0)) {
12028 sctp_add_an_in_stream(chk, seq, adding_i);
12030 asoc->stream_reset_outstanding++;
12033 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12035 asoc->stream_reset_outstanding++;
12037 if (send_tsn_req) {
12038 sctp_add_stream_reset_tsn(chk, seq);
12039 asoc->stream_reset_outstanding++;
12041 asoc->str_reset = chk;
12042 /* insert the chunk for sending */
12043 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12046 asoc->ctrl_queue_cnt++;
12047 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12052 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12053 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12054 uint8_t use_mflowid, uint32_t mflowid,
12055 uint32_t vrf_id, uint16_t port)
12057 /* Don't respond to an ABORT with an ABORT. */
12058 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12060 sctp_m_freem(cause);
12063 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12064 use_mflowid, mflowid,
12070 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12071 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12072 uint8_t use_mflowid, uint32_t mflowid,
12073 uint32_t vrf_id, uint16_t port)
12075 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12076 use_mflowid, mflowid,
12081 static struct mbuf *
12082 sctp_copy_resume(struct uio *uio,
12084 int user_marks_eor,
12087 struct mbuf **new_tail)
12091 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12092 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12094 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12097 *sndout = m_length(m, NULL);
12098 *new_tail = m_last(m);
12104 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12111 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12113 if (sp->data == NULL) {
12114 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12117 sp->tail_mbuf = m_last(sp->data);
12123 static struct sctp_stream_queue_pending *
12124 sctp_copy_it_in(struct sctp_tcb *stcb,
12125 struct sctp_association *asoc,
12126 struct sctp_sndrcvinfo *srcv,
12128 struct sctp_nets *net,
12130 int user_marks_eor,
12134 * This routine must be very careful in its work. Protocol
12135 * processing is up and running so care must be taken to spl...()
12136 * when you need to do something that may effect the stcb/asoc. The
12137 * sb is locked however. When data is copied the protocol processing
12138 * should be enabled since this is a slower operation...
12140 struct sctp_stream_queue_pending *sp = NULL;
12144 /* Now can we send this? */
12145 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12146 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12147 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12148 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12149 /* got data while shutting down */
12150 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12151 *error = ECONNRESET;
12154 sctp_alloc_a_strmoq(stcb, sp);
12156 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12161 sp->sender_all_done = 0;
12162 sp->sinfo_flags = srcv->sinfo_flags;
12163 sp->timetolive = srcv->sinfo_timetolive;
12164 sp->ppid = srcv->sinfo_ppid;
12165 sp->context = srcv->sinfo_context;
12166 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12168 sp->stream = srcv->sinfo_stream;
12169 sp->length = min(uio->uio_resid, max_send_len);
12170 if ((sp->length == (uint32_t) uio->uio_resid) &&
12171 ((user_marks_eor == 0) ||
12172 (srcv->sinfo_flags & SCTP_EOF) ||
12173 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12174 sp->msg_is_complete = 1;
12176 sp->msg_is_complete = 0;
12178 sp->sender_all_done = 0;
12179 sp->some_taken = 0;
12180 sp->put_last_out = 0;
12181 resv_in_first = sizeof(struct sctp_data_chunk);
12182 sp->data = sp->tail_mbuf = NULL;
12183 if (sp->length == 0) {
12187 if (srcv->sinfo_keynumber_valid) {
12188 sp->auth_keyid = srcv->sinfo_keynumber;
12190 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12192 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12193 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12194 sp->holds_key_ref = 1;
12196 *error = sctp_copy_one(sp, uio, resv_in_first);
12199 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12202 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12204 atomic_add_int(&sp->net->ref_count, 1);
12208 sctp_set_prsctp_policy(sp);
12216 sctp_sosend(struct socket *so,
12217 struct sockaddr *addr,
12220 struct mbuf *control,
12225 int error, use_sndinfo = 0;
12226 struct sctp_sndrcvinfo sndrcvninfo;
12227 struct sockaddr *addr_to_use;
12229 #if defined(INET) && defined(INET6)
12230 struct sockaddr_in sin;
12235 /* process cmsg snd/rcv info (maybe a assoc-id) */
12236 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12237 sizeof(sndrcvninfo))) {
12242 addr_to_use = addr;
12243 #if defined(INET) && defined(INET6)
12244 if ((addr) && (addr->sa_family == AF_INET6)) {
12245 struct sockaddr_in6 *sin6;
12247 sin6 = (struct sockaddr_in6 *)addr;
12248 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12249 in6_sin6_2_sin(&sin, sin6);
12250 addr_to_use = (struct sockaddr *)&sin;
12254 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12257 use_sndinfo ? &sndrcvninfo : NULL
12265 sctp_lower_sosend(struct socket *so,
12266 struct sockaddr *addr,
12268 struct mbuf *i_pak,
12269 struct mbuf *control,
12271 struct sctp_sndrcvinfo *srcv
12276 unsigned int sndlen = 0, max_len;
12278 struct mbuf *top = NULL;
12279 int queue_only = 0, queue_only_for_init = 0;
12280 int free_cnt_applied = 0;
12282 int now_filled = 0;
12283 unsigned int inqueue_bytes = 0;
12284 struct sctp_block_entry be;
12285 struct sctp_inpcb *inp;
12286 struct sctp_tcb *stcb = NULL;
12287 struct timeval now;
12288 struct sctp_nets *net;
12289 struct sctp_association *asoc;
12290 struct sctp_inpcb *t_inp;
12291 int user_marks_eor;
12292 int create_lock_applied = 0;
12293 int nagle_applies = 0;
12294 int some_on_control = 0;
12295 int got_all_of_the_send = 0;
12296 int hold_tcblock = 0;
12297 int non_blocking = 0;
12298 uint32_t local_add_more, local_soresv = 0;
12300 uint16_t sinfo_flags;
12301 sctp_assoc_t sinfo_assoc_id;
12308 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12310 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12313 SCTP_RELEASE_PKT(i_pak);
12317 if ((uio == NULL) && (i_pak == NULL)) {
12318 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12321 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12322 atomic_add_int(&inp->total_sends, 1);
12324 if (uio->uio_resid < 0) {
12325 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12328 sndlen = uio->uio_resid;
12330 top = SCTP_HEADER_TO_CHAIN(i_pak);
12331 sndlen = SCTP_HEADER_LEN(i_pak);
12333 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12336 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12337 (inp->sctp_socket->so_qlimit)) {
12338 /* The listener can NOT send */
12339 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12344 * Pre-screen address, if one is given the sin-len
12345 * must be set correctly!
12348 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12350 switch (raddr->sa.sa_family) {
12353 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12354 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12358 port = raddr->sin.sin_port;
12363 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12364 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12368 port = raddr->sin6.sin6_port;
12372 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12373 error = EAFNOSUPPORT;
12380 sinfo_flags = srcv->sinfo_flags;
12381 sinfo_assoc_id = srcv->sinfo_assoc_id;
12382 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12383 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12384 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12388 if (srcv->sinfo_flags)
12389 SCTP_STAT_INCR(sctps_sends_with_flags);
12391 sinfo_flags = inp->def_send.sinfo_flags;
12392 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12394 if (sinfo_flags & SCTP_SENDALL) {
12395 /* its a sendall */
12396 error = sctp_sendall(inp, uio, top, srcv);
12400 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12401 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12405 /* now we must find the assoc */
12406 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12407 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12408 SCTP_INP_RLOCK(inp);
12409 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12411 SCTP_TCB_LOCK(stcb);
12414 SCTP_INP_RUNLOCK(inp);
12415 } else if (sinfo_assoc_id) {
12416 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12419 * Since we did not use findep we must
12420 * increment it, and if we don't find a tcb
12423 SCTP_INP_WLOCK(inp);
12424 SCTP_INP_INCR_REF(inp);
12425 SCTP_INP_WUNLOCK(inp);
12426 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12427 if (stcb == NULL) {
12428 SCTP_INP_WLOCK(inp);
12429 SCTP_INP_DECR_REF(inp);
12430 SCTP_INP_WUNLOCK(inp);
12435 if ((stcb == NULL) && (addr)) {
12436 /* Possible implicit send? */
12437 SCTP_ASOC_CREATE_LOCK(inp);
12438 create_lock_applied = 1;
12439 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12440 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12441 /* Should I really unlock ? */
12442 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12447 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12448 (addr->sa_family == AF_INET6)) {
12449 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12453 SCTP_INP_WLOCK(inp);
12454 SCTP_INP_INCR_REF(inp);
12455 SCTP_INP_WUNLOCK(inp);
12456 /* With the lock applied look again */
12457 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12458 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12459 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12461 if (stcb == NULL) {
12462 SCTP_INP_WLOCK(inp);
12463 SCTP_INP_DECR_REF(inp);
12464 SCTP_INP_WUNLOCK(inp);
12471 if (t_inp != inp) {
12472 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12477 if (stcb == NULL) {
12478 if (addr == NULL) {
12479 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12483 /* We must go ahead and start the INIT process */
12486 if ((sinfo_flags & SCTP_ABORT) ||
12487 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12489 * User asks to abort a non-existant assoc,
12490 * or EOF a non-existant assoc with no data
12492 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12496 /* get an asoc/stcb struct */
12497 vrf_id = inp->def_vrf_id;
12499 if (create_lock_applied == 0) {
12500 panic("Error, should hold create lock and I don't?");
12503 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12506 if (stcb == NULL) {
12507 /* Error is setup for us in the call */
12510 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12511 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12513 * Set the connected flag so we can queue
12516 soisconnecting(so);
12519 if (create_lock_applied) {
12520 SCTP_ASOC_CREATE_UNLOCK(inp);
12521 create_lock_applied = 0;
12523 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12526 * Turn on queue only flag to prevent data from
12530 asoc = &stcb->asoc;
12531 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12532 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12534 /* initialize authentication params for the assoc */
12535 sctp_initialize_auth_params(inp, stcb);
12538 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12539 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12545 /* out with the INIT */
12546 queue_only_for_init = 1;
12548 * we may want to dig in after this call and adjust the MTU
12549 * value. It defaulted to 1500 (constant) but the ro
12550 * structure may now have an update and thus we may need to
12551 * change it BEFORE we append the message.
12555 asoc = &stcb->asoc;
12557 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12558 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12560 net = sctp_findnet(stcb, addr);
12563 if ((net == NULL) ||
12564 ((port != 0) && (port != stcb->rport))) {
12565 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12570 if (stcb->asoc.alternate) {
12571 net = stcb->asoc.alternate;
12573 net = stcb->asoc.primary_destination;
12576 atomic_add_int(&stcb->total_sends, 1);
12577 /* Keep the stcb from being freed under our feet */
12578 atomic_add_int(&asoc->refcnt, 1);
12579 free_cnt_applied = 1;
12581 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12582 if (sndlen > asoc->smallest_mtu) {
12583 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12588 if (SCTP_SO_IS_NBIO(so)
12589 || (flags & MSG_NBIO)
12593 /* would we block? */
12594 if (non_blocking) {
12595 if (hold_tcblock == 0) {
12596 SCTP_TCB_LOCK(stcb);
12599 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12600 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12601 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12602 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12603 if (sndlen > SCTP_SB_LIMIT_SND(so))
12606 error = EWOULDBLOCK;
12609 stcb->asoc.sb_send_resv += sndlen;
12610 SCTP_TCB_UNLOCK(stcb);
12613 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12615 local_soresv = sndlen;
12616 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12617 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12618 error = ECONNRESET;
12621 if (create_lock_applied) {
12622 SCTP_ASOC_CREATE_UNLOCK(inp);
12623 create_lock_applied = 0;
12625 if (asoc->stream_reset_outstanding) {
12627 * Can't queue any data while stream reset is underway.
12629 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12633 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12634 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12637 /* we are now done with all control */
12639 sctp_m_freem(control);
12642 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12643 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12644 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12645 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12646 if (srcv->sinfo_flags & SCTP_ABORT) {
12649 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12650 error = ECONNRESET;
12654 /* Ok, we will attempt a msgsnd :> */
12656 p->td_ru.ru_msgsnd++;
12658 /* Are we aborting? */
12659 if (srcv->sinfo_flags & SCTP_ABORT) {
12661 int tot_demand, tot_out = 0, max_out;
12663 SCTP_STAT_INCR(sctps_sends_with_abort);
12664 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12665 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12666 /* It has to be up before we abort */
12667 /* how big is the user initiated abort? */
12668 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12672 if (hold_tcblock) {
12673 SCTP_TCB_UNLOCK(stcb);
12677 struct mbuf *cntm = NULL;
12679 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12681 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12682 tot_out += SCTP_BUF_LEN(cntm);
12686 /* Must fit in a MTU */
12688 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12689 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12691 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12695 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12698 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12702 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12703 max_out -= sizeof(struct sctp_abort_msg);
12704 if (tot_out > max_out) {
12708 struct sctp_paramhdr *ph;
12710 /* now move forward the data pointer */
12711 ph = mtod(mm, struct sctp_paramhdr *);
12712 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12713 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12715 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12717 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12720 * Here if we can't get his data we
12721 * still abort we just don't get to
12722 * send the users note :-0
12729 SCTP_BUF_NEXT(mm) = top;
12733 if (hold_tcblock == 0) {
12734 SCTP_TCB_LOCK(stcb);
12736 atomic_add_int(&stcb->asoc.refcnt, -1);
12737 free_cnt_applied = 0;
12738 /* release this lock, otherwise we hang on ourselves */
12739 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12740 /* now relock the stcb so everything is sane */
12744 * In this case top is already chained to mm avoid double
12745 * free, since we free it below if top != NULL and driver
12746 * would free it after sending the packet out
12753 /* Calculate the maximum we can send */
12754 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12755 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12756 if (non_blocking) {
12757 /* we already checked for non-blocking above. */
12760 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12765 if (hold_tcblock) {
12766 SCTP_TCB_UNLOCK(stcb);
12769 /* Is the stream no. valid? */
12770 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12771 /* Invalid stream number */
12772 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12776 if (asoc->strmout == NULL) {
12777 /* huh? software error */
12778 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12782 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12783 if ((user_marks_eor == 0) &&
12784 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12785 /* It will NEVER fit */
12786 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12790 if ((uio == NULL) && user_marks_eor) {
12792 * We do not support eeor mode for
12793 * sending with mbuf chains (like sendfile).
12795 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12799 if (user_marks_eor) {
12800 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12803 * For non-eeor the whole message must fit in
12804 * the socket send buffer.
12806 local_add_more = sndlen;
12809 if (non_blocking) {
12810 goto skip_preblock;
12812 if (((max_len <= local_add_more) &&
12813 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12815 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12816 /* No room right now ! */
12817 SOCKBUF_LOCK(&so->so_snd);
12818 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12819 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12820 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12821 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12822 (unsigned int)SCTP_SB_LIMIT_SND(so),
12825 stcb->asoc.stream_queue_cnt,
12826 stcb->asoc.chunks_on_out_queue,
12827 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12828 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12829 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12832 stcb->block_entry = &be;
12833 error = sbwait(&so->so_snd);
12834 stcb->block_entry = NULL;
12835 if (error || so->so_error || be.error) {
12838 error = so->so_error;
12843 SOCKBUF_UNLOCK(&so->so_snd);
12846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12847 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12848 asoc, stcb->asoc.total_output_queue_size);
12850 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12853 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12855 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12856 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12860 SOCKBUF_UNLOCK(&so->so_snd);
12863 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12867 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12868 * case NOTE: uio will be null when top/mbuf is passed
12871 if (srcv->sinfo_flags & SCTP_EOF) {
12872 got_all_of_the_send = 1;
12875 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12881 struct sctp_stream_queue_pending *sp;
12882 struct sctp_stream_out *strm;
12885 SCTP_TCB_SEND_LOCK(stcb);
12886 if ((asoc->stream_locked) &&
12887 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12888 SCTP_TCB_SEND_UNLOCK(stcb);
12889 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12893 SCTP_TCB_SEND_UNLOCK(stcb);
12895 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12896 if (strm->last_msg_incomplete == 0) {
12898 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12899 if ((sp == NULL) || (error)) {
12902 SCTP_TCB_SEND_LOCK(stcb);
12903 if (sp->msg_is_complete) {
12904 strm->last_msg_incomplete = 0;
12905 asoc->stream_locked = 0;
12908 * Just got locked to this guy in case of an
12911 strm->last_msg_incomplete = 1;
12912 asoc->stream_locked = 1;
12913 asoc->stream_locked_on = srcv->sinfo_stream;
12914 sp->sender_all_done = 0;
12916 sctp_snd_sb_alloc(stcb, sp->length);
12917 atomic_add_int(&asoc->stream_queue_cnt, 1);
12918 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12919 SCTP_STAT_INCR(sctps_sends_with_unord);
12921 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12922 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12923 SCTP_TCB_SEND_UNLOCK(stcb);
12925 SCTP_TCB_SEND_LOCK(stcb);
12926 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12927 SCTP_TCB_SEND_UNLOCK(stcb);
12929 /* ???? Huh ??? last msg is gone */
12931 panic("Warning: Last msg marked incomplete, yet nothing left?");
12933 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12934 strm->last_msg_incomplete = 0;
12940 while (uio->uio_resid > 0) {
12941 /* How much room do we have? */
12942 struct mbuf *new_tail, *mm;
12944 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12945 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12949 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12950 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12951 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12954 if (hold_tcblock) {
12955 SCTP_TCB_UNLOCK(stcb);
12958 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12959 if ((mm == NULL) || error) {
12965 /* Update the mbuf and count */
12966 SCTP_TCB_SEND_LOCK(stcb);
12967 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12969 * we need to get out. Peer probably
12973 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12974 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12975 error = ECONNRESET;
12977 SCTP_TCB_SEND_UNLOCK(stcb);
12980 if (sp->tail_mbuf) {
12981 /* tack it to the end */
12982 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12983 sp->tail_mbuf = new_tail;
12985 /* A stolen mbuf */
12987 sp->tail_mbuf = new_tail;
12989 sctp_snd_sb_alloc(stcb, sndout);
12990 atomic_add_int(&sp->length, sndout);
12993 /* Did we reach EOR? */
12994 if ((uio->uio_resid == 0) &&
12995 ((user_marks_eor == 0) ||
12996 (srcv->sinfo_flags & SCTP_EOF) ||
12997 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12998 sp->msg_is_complete = 1;
13000 sp->msg_is_complete = 0;
13002 SCTP_TCB_SEND_UNLOCK(stcb);
13004 if (uio->uio_resid == 0) {
13009 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13011 * This is ugly but we must assure locking
13014 if (hold_tcblock == 0) {
13015 SCTP_TCB_LOCK(stcb);
13018 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13019 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13020 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13021 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13027 SCTP_TCB_UNLOCK(stcb);
13030 /* wait for space now */
13031 if (non_blocking) {
13032 /* Non-blocking io in place out */
13035 /* What about the INIT, send it maybe */
13036 if (queue_only_for_init) {
13037 if (hold_tcblock == 0) {
13038 SCTP_TCB_LOCK(stcb);
13041 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13042 /* a collision took us forward? */
13045 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13046 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13050 if ((net->flight_size > net->cwnd) &&
13051 (asoc->sctp_cmt_on_off == 0)) {
13052 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13054 } else if (asoc->ifp_had_enobuf) {
13055 SCTP_STAT_INCR(sctps_ifnomemqueued);
13056 if (net->flight_size > (2 * net->mtu)) {
13059 asoc->ifp_had_enobuf = 0;
13061 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13062 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13063 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13064 (stcb->asoc.total_flight > 0) &&
13065 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13066 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13069 * Ok, Nagle is set on and we have data outstanding.
13070 * Don't send anything and let SACKs drive out the
13071 * data unless wen have a "full" segment to send.
13073 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13074 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13076 SCTP_STAT_INCR(sctps_naglequeued);
13079 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13080 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13081 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13083 SCTP_STAT_INCR(sctps_naglesent);
13086 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13088 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13089 nagle_applies, un_sent);
13090 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13091 stcb->asoc.total_flight,
13092 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13094 if (queue_only_for_init)
13095 queue_only_for_init = 0;
13096 if ((queue_only == 0) && (nagle_applies == 0)) {
13098 * need to start chunk output
13099 * before blocking.. note that if
13100 * a lock is already applied, then
13101 * the input via the net is happening
13102 * and I don't need to start output :-D
13104 if (hold_tcblock == 0) {
13105 if (SCTP_TCB_TRYLOCK(stcb)) {
13107 sctp_chunk_output(inp,
13109 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13112 sctp_chunk_output(inp,
13114 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13116 if (hold_tcblock == 1) {
13117 SCTP_TCB_UNLOCK(stcb);
13121 SOCKBUF_LOCK(&so->so_snd);
13123 * This is a bit strange, but I think it will
13124 * work. The total_output_queue_size is locked and
13125 * protected by the TCB_LOCK, which we just released.
13126 * There is a race that can occur between releasing it
13127 * above, and me getting the socket lock, where sacks
13128 * come in but we have not put the SB_WAIT on the
13129 * so_snd buffer to get the wakeup. After the LOCK
13130 * is applied the sack_processing will also need to
13131 * LOCK the so->so_snd to do the actual sowwakeup(). So
13132 * once we have the socket buffer lock if we recheck the
13133 * size we KNOW we will get to sleep safely with the
13134 * wakeup flag in place.
13136 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13137 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13139 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13140 asoc, uio->uio_resid);
13143 stcb->block_entry = &be;
13144 error = sbwait(&so->so_snd);
13145 stcb->block_entry = NULL;
13147 if (error || so->so_error || be.error) {
13150 error = so->so_error;
13155 SOCKBUF_UNLOCK(&so->so_snd);
13158 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13159 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13160 asoc, stcb->asoc.total_output_queue_size);
13163 SOCKBUF_UNLOCK(&so->so_snd);
13164 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13168 SCTP_TCB_SEND_LOCK(stcb);
13170 if (sp->msg_is_complete == 0) {
13171 strm->last_msg_incomplete = 1;
13172 asoc->stream_locked = 1;
13173 asoc->stream_locked_on = srcv->sinfo_stream;
13175 sp->sender_all_done = 1;
13176 strm->last_msg_incomplete = 0;
13177 asoc->stream_locked = 0;
13180 SCTP_PRINTF("Huh no sp TSNH?\n");
13181 strm->last_msg_incomplete = 0;
13182 asoc->stream_locked = 0;
13184 SCTP_TCB_SEND_UNLOCK(stcb);
13185 if (uio->uio_resid == 0) {
13186 got_all_of_the_send = 1;
13189 /* We send in a 0, since we do NOT have any locks */
13190 error = sctp_msg_append(stcb, net, top, srcv, 0);
13192 if (srcv->sinfo_flags & SCTP_EOF) {
13194 * This should only happen for Panda for the mbuf
13195 * send case, which does NOT yet support EEOR mode.
13196 * Thus, we can just set this flag to do the proper
13199 got_all_of_the_send = 1;
13207 if ((srcv->sinfo_flags & SCTP_EOF) &&
13208 (got_all_of_the_send == 1)) {
13211 SCTP_STAT_INCR(sctps_sends_with_eof);
13213 if (hold_tcblock == 0) {
13214 SCTP_TCB_LOCK(stcb);
13217 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13218 if (TAILQ_EMPTY(&asoc->send_queue) &&
13219 TAILQ_EMPTY(&asoc->sent_queue) &&
13221 if (asoc->locked_on_sending) {
13224 /* there is nothing queued to send, so I'm done... */
13225 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13226 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13227 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13228 struct sctp_nets *netp;
13230 /* only send SHUTDOWN the first time through */
13231 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13232 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13234 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13235 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13236 sctp_stop_timers_for_shutdown(stcb);
13237 if (stcb->asoc.alternate) {
13238 netp = stcb->asoc.alternate;
13240 netp = stcb->asoc.primary_destination;
13242 sctp_send_shutdown(stcb, netp);
13243 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13245 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13246 asoc->primary_destination);
13250 * we still got (or just got) data to send, so set
13254 * XXX sockets draft says that SCTP_EOF should be
13255 * sent with no data. currently, we will allow user
13256 * data to be sent first and move to
13259 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13260 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13261 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13262 if (hold_tcblock == 0) {
13263 SCTP_TCB_LOCK(stcb);
13266 if (asoc->locked_on_sending) {
13267 /* Locked to send out the data */
13268 struct sctp_stream_queue_pending *sp;
13270 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13272 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13273 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13276 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13277 if (TAILQ_EMPTY(&asoc->send_queue) &&
13278 TAILQ_EMPTY(&asoc->sent_queue) &&
13279 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13281 if (free_cnt_applied) {
13282 atomic_add_int(&stcb->asoc.refcnt, -1);
13283 free_cnt_applied = 0;
13285 sctp_abort_an_association(stcb->sctp_ep, stcb,
13286 NULL, SCTP_SO_LOCKED);
13288 * now relock the stcb so everything
13295 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13296 asoc->primary_destination);
13297 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13302 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13303 some_on_control = 1;
13305 if (queue_only_for_init) {
13306 if (hold_tcblock == 0) {
13307 SCTP_TCB_LOCK(stcb);
13310 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13311 /* a collision took us forward? */
13314 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13315 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13319 if ((net->flight_size > net->cwnd) &&
13320 (stcb->asoc.sctp_cmt_on_off == 0)) {
13321 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13323 } else if (asoc->ifp_had_enobuf) {
13324 SCTP_STAT_INCR(sctps_ifnomemqueued);
13325 if (net->flight_size > (2 * net->mtu)) {
13328 asoc->ifp_had_enobuf = 0;
13330 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13331 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13332 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13333 (stcb->asoc.total_flight > 0) &&
13334 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13335 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13337 * Ok, Nagle is set on and we have data outstanding.
13338 * Don't send anything and let SACKs drive out the
13339 * data unless wen have a "full" segment to send.
13341 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13342 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13344 SCTP_STAT_INCR(sctps_naglequeued);
13347 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13348 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13349 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13351 SCTP_STAT_INCR(sctps_naglesent);
13354 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13355 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13356 nagle_applies, un_sent);
13357 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13358 stcb->asoc.total_flight,
13359 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13361 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13362 /* we can attempt to send too. */
13363 if (hold_tcblock == 0) {
13365 * If there is activity recv'ing sacks no need to
13368 if (SCTP_TCB_TRYLOCK(stcb)) {
13369 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13373 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13375 } else if ((queue_only == 0) &&
13376 (stcb->asoc.peers_rwnd == 0) &&
13377 (stcb->asoc.total_flight == 0)) {
13378 /* We get to have a probe outstanding */
13379 if (hold_tcblock == 0) {
13381 SCTP_TCB_LOCK(stcb);
13383 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13384 } else if (some_on_control) {
13385 int num_out, reason, frag_point;
13387 /* Here we do control only */
13388 if (hold_tcblock == 0) {
13390 SCTP_TCB_LOCK(stcb);
13392 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13393 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13394 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13396 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13397 queue_only, stcb->asoc.peers_rwnd, un_sent,
13398 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13399 stcb->asoc.total_output_queue_size, error);
13404 if (local_soresv && stcb) {
13405 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13407 if (create_lock_applied) {
13408 SCTP_ASOC_CREATE_UNLOCK(inp);
13410 if ((stcb) && hold_tcblock) {
13411 SCTP_TCB_UNLOCK(stcb);
13413 if (stcb && free_cnt_applied) {
13414 atomic_add_int(&stcb->asoc.refcnt, -1);
13418 if (mtx_owned(&stcb->tcb_mtx)) {
13419 panic("Leaving with tcb mtx owned?");
13421 if (mtx_owned(&stcb->tcb_send_mtx)) {
13422 panic("Leaving with tcb send mtx owned?");
13428 sctp_validate_no_locks(inp);
13430 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13437 sctp_m_freem(control);
13444 * generate an AUTHentication chunk, if required
13447 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13448 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13449 struct sctp_tcb *stcb, uint8_t chunk)
13451 struct mbuf *m_auth;
13452 struct sctp_auth_chunk *auth;
13456 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13460 if (stcb->asoc.auth_supported == 0) {
13463 /* does the requested chunk require auth? */
13464 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13467 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13468 if (m_auth == NULL) {
13472 /* reserve some space if this will be the first mbuf */
13474 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13475 /* fill in the AUTH chunk details */
13476 auth = mtod(m_auth, struct sctp_auth_chunk *);
13477 bzero(auth, sizeof(*auth));
13478 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13479 auth->ch.chunk_flags = 0;
13480 chunk_len = sizeof(*auth) +
13481 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13482 auth->ch.chunk_length = htons(chunk_len);
13483 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13484 /* key id and hmac digest will be computed and filled in upon send */
13486 /* save the offset where the auth was inserted into the chain */
13488 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13489 *offset += SCTP_BUF_LEN(cn);
13492 /* update length and return pointer to the auth chunk */
13493 SCTP_BUF_LEN(m_auth) = chunk_len;
13494 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13495 if (auth_ret != NULL)
13503 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13505 struct nd_prefix *pfx = NULL;
13506 struct nd_pfxrouter *pfxrtr = NULL;
13507 struct sockaddr_in6 gw6;
13509 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13512 /* get prefix entry of address */
13513 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13514 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13516 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13517 &src6->sin6_addr, &pfx->ndpr_mask))
13520 /* no prefix entry in the prefix list */
13522 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13523 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13526 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13527 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13529 /* search installed gateway from prefix entry */
13530 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13531 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13532 gw6.sin6_family = AF_INET6;
13533 gw6.sin6_len = sizeof(struct sockaddr_in6);
13534 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13535 sizeof(struct in6_addr));
13536 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13537 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13538 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13539 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13540 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13541 ro->ro_rt->rt_gateway)) {
13542 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13546 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13553 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13556 struct sockaddr_in *sin, *mask;
13557 struct ifaddr *ifa;
13558 struct in_addr srcnetaddr, gwnetaddr;
13560 if (ro == NULL || ro->ro_rt == NULL ||
13561 sifa->address.sa.sa_family != AF_INET) {
13564 ifa = (struct ifaddr *)sifa->ifa;
13565 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13566 sin = &sifa->address.sin;
13567 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13568 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13569 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13570 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13572 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13573 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13574 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13575 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13576 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13577 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {