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 atomic_add_int(&sifa->refcount, 1);
3169 * plan_d: We are in trouble. No preferred address on the emit
3170 * interface. And not even a preferred address on all interfaces. Go
3171 * out and see if we can find an acceptable address somewhere
3172 * amongst all interfaces.
3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3177 /* wrong base scope */
3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3184 &sctp_ifa->address.sin.sin_addr) != 0)) {
3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3196 (non_asoc_addr_ok == 0))
3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3208 if (((non_asoc_addr_ok == 0) &&
3209 (sctp_is_addr_restricted(stcb, sifa))) ||
3210 (non_asoc_addr_ok &&
3211 (sctp_is_addr_restricted(stcb, sifa)) &&
3212 (!sctp_is_addr_pending(stcb, sifa)))) {
3214 * It is restricted for some
3215 * reason.. probably not yet added.
3226 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3227 stcb->asoc.scope.ipv4_local_scope = 1;
3229 goto again_with_private_addresses_allowed;
3230 } else if (retried == 1) {
3231 stcb->asoc.scope.ipv4_local_scope = 0;
3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3241 /* wrong base scope */
3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3245 struct sctp_ifa *tmp_sifa;
3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3250 &sctp_ifa->address.sin.sin_addr) != 0)) {
3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3262 (non_asoc_addr_ok == 0))
3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3267 if (tmp_sifa == NULL) {
3270 if (tmp_sifa == sifa) {
3274 if (sctp_is_address_in_scope(tmp_sifa,
3275 &stcb->asoc.scope, 0) == 0) {
3278 if (((non_asoc_addr_ok == 0) &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3280 (non_asoc_addr_ok &&
3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3294 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3299 atomic_add_int(&sifa->refcount, 1);
3307 /* tcb may be NULL */
3309 sctp_source_address_selection(struct sctp_inpcb *inp,
3310 struct sctp_tcb *stcb,
3312 struct sctp_nets *net,
3313 int non_asoc_addr_ok, uint32_t vrf_id)
3315 struct sctp_ifa *answer;
3316 uint8_t dest_is_priv, dest_is_loop;
3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
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, inp->fibnum);
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.strmout[i].state = SCTP_STREAM_OPENING;
3658 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3663 case SCTP_DSTADDRV4:
3664 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3668 memset(&sin, 0, sizeof(struct sockaddr_in));
3669 sin.sin_family = AF_INET;
3670 sin.sin_len = sizeof(struct sockaddr_in);
3671 sin.sin_port = stcb->rport;
3672 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3673 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3674 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3675 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3679 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3680 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3687 case SCTP_DSTADDRV6:
3688 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3692 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3693 sin6.sin6_family = AF_INET6;
3694 sin6.sin6_len = sizeof(struct sockaddr_in6);
3695 sin6.sin6_port = stcb->rport;
3696 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3697 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3698 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3703 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3704 in6_sin6_2_sin(&sin, &sin6);
3705 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3706 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3707 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3711 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3712 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3718 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3719 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3729 at += CMSG_ALIGN(cmh.cmsg_len);
3734 static struct sctp_tcb *
3735 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3737 struct mbuf *control,
3738 struct sctp_nets **net_p,
3743 struct sctp_tcb *stcb;
3744 struct sockaddr *addr;
3747 struct sockaddr_in sin;
3751 struct sockaddr_in6 sin6;
3755 tlen = SCTP_BUF_LEN(control);
3758 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3759 /* There is not enough room for one more. */
3763 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3764 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3765 /* We dont't have a complete CMSG header. */
3769 if (((int)cmh.cmsg_len + at) > tlen) {
3770 /* We don't have the complete CMSG. */
3774 if (cmh.cmsg_level == IPPROTO_SCTP) {
3775 switch (cmh.cmsg_type) {
3777 case SCTP_DSTADDRV4:
3778 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3782 memset(&sin, 0, sizeof(struct sockaddr_in));
3783 sin.sin_family = AF_INET;
3784 sin.sin_len = sizeof(struct sockaddr_in);
3785 sin.sin_port = port;
3786 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3787 addr = (struct sockaddr *)&sin;
3791 case SCTP_DSTADDRV6:
3792 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3796 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3797 sin6.sin6_family = AF_INET6;
3798 sin6.sin6_len = sizeof(struct sockaddr_in6);
3799 sin6.sin6_port = port;
3800 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3802 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3803 in6_sin6_2_sin(&sin, &sin6);
3804 addr = (struct sockaddr *)&sin;
3807 addr = (struct sockaddr *)&sin6;
3815 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3821 at += CMSG_ALIGN(cmh.cmsg_len);
3826 static struct mbuf *
3827 sctp_add_cookie(struct mbuf *init, int init_offset,
3828 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3830 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3831 struct sctp_state_cookie *stc;
3832 struct sctp_paramhdr *ph;
3837 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3838 sizeof(struct sctp_paramhdr)), 0,
3839 M_NOWAIT, 1, MT_DATA);
3843 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3844 if (copy_init == NULL) {
3848 #ifdef SCTP_MBUF_LOGGING
3849 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3850 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3853 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3855 if (copy_initack == NULL) {
3857 sctp_m_freem(copy_init);
3860 #ifdef SCTP_MBUF_LOGGING
3861 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3862 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3865 /* easy side we just drop it on the end */
3866 ph = mtod(mret, struct sctp_paramhdr *);
3867 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3868 sizeof(struct sctp_paramhdr);
3869 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3870 sizeof(struct sctp_paramhdr));
3871 ph->param_type = htons(SCTP_STATE_COOKIE);
3872 ph->param_length = 0; /* fill in at the end */
3873 /* Fill in the stc cookie data */
3874 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3876 /* tack the INIT and then the INIT-ACK onto the chain */
3878 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3879 cookie_sz += SCTP_BUF_LEN(m_at);
3880 if (SCTP_BUF_NEXT(m_at) == NULL) {
3881 SCTP_BUF_NEXT(m_at) = copy_init;
3885 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3886 cookie_sz += SCTP_BUF_LEN(m_at);
3887 if (SCTP_BUF_NEXT(m_at) == NULL) {
3888 SCTP_BUF_NEXT(m_at) = copy_initack;
3892 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3893 cookie_sz += SCTP_BUF_LEN(m_at);
3894 if (SCTP_BUF_NEXT(m_at) == NULL) {
3898 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3900 /* no space, so free the entire chain */
3904 SCTP_BUF_LEN(sig) = 0;
3905 SCTP_BUF_NEXT(m_at) = sig;
3907 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3908 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3910 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3911 cookie_sz += SCTP_SIGNATURE_SIZE;
3912 ph->param_length = htons(cookie_sz);
3918 sctp_get_ect(struct sctp_tcb *stcb)
3920 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3921 return (SCTP_ECT0_BIT);
3927 #if defined(INET) || defined(INET6)
3929 sctp_handle_no_route(struct sctp_tcb *stcb,
3930 struct sctp_nets *net,
3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3937 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3938 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3939 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3941 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3945 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3946 net->dest_state &= ~SCTP_ADDR_PF;
3950 if (net == stcb->asoc.primary_destination) {
3951 /* need a new primary */
3952 struct sctp_nets *alt;
3954 alt = sctp_find_alternate_net(stcb, net, 0);
3956 if (stcb->asoc.alternate) {
3957 sctp_free_remote_addr(stcb->asoc.alternate);
3959 stcb->asoc.alternate = alt;
3960 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3961 if (net->ro._s_addr) {
3962 sctp_free_ifa(net->ro._s_addr);
3963 net->ro._s_addr = NULL;
3965 net->src_addr_selected = 0;
3975 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3976 struct sctp_tcb *stcb, /* may be NULL */
3977 struct sctp_nets *net,
3978 struct sockaddr *to,
3980 uint32_t auth_offset,
3981 struct sctp_auth_chunk *auth,
3982 uint16_t auth_keyid,
3983 int nofragment_flag,
3990 union sctp_sockstore *over_addr,
3991 uint8_t mflowtype, uint32_t mflowid,
3992 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3993 int so_locked SCTP_UNUSED
3998 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
4001 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
4002 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4003 * - fill in the HMAC digest of any AUTH chunk in the packet.
4004 * - calculate and fill in the SCTP checksum.
4005 * - prepend an IP address header.
4006 * - if boundall use INADDR_ANY.
4007 * - if boundspecific do source address selection.
4008 * - set fragmentation option for ipV4.
4009 * - On return from IP output, check/adjust mtu size of output
4010 * interface and smallest_mtu size as well.
4012 /* Will need ifdefs around this */
4014 struct sctphdr *sctphdr;
4018 #if defined(INET) || defined(INET6)
4022 #if defined(INET) || defined(INET6)
4024 sctp_route_t *ro = NULL;
4025 struct udphdr *udp = NULL;
4030 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4031 struct socket *so = NULL;
4035 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4036 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4040 #if defined(INET) || defined(INET6)
4042 vrf_id = stcb->asoc.vrf_id;
4044 vrf_id = inp->def_vrf_id;
4047 /* fill in the HMAC digest for any AUTH chunk in the packet */
4048 if ((auth != NULL) && (stcb != NULL)) {
4049 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4052 tos_value = net->dscp;
4054 tos_value = stcb->asoc.default_dscp;
4056 tos_value = inp->sctp_ep.default_dscp;
4059 switch (to->sa_family) {
4063 struct ip *ip = NULL;
4064 sctp_route_t iproute;
4067 len = SCTP_MIN_V4_OVERHEAD;
4069 len += sizeof(struct udphdr);
4071 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4074 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4077 SCTP_ALIGN_TO_END(newm, len);
4078 SCTP_BUF_LEN(newm) = len;
4079 SCTP_BUF_NEXT(newm) = m;
4082 m->m_pkthdr.flowid = net->flowid;
4083 M_HASHTYPE_SET(m, net->flowtype);
4085 m->m_pkthdr.flowid = mflowid;
4086 M_HASHTYPE_SET(m, mflowtype);
4088 packet_length = sctp_calculate_len(m);
4089 ip = mtod(m, struct ip *);
4090 ip->ip_v = IPVERSION;
4091 ip->ip_hl = (sizeof(struct ip) >> 2);
4092 if (tos_value == 0) {
4094 * This means especially, that it is not set
4095 * at the SCTP layer. So use the value from
4098 tos_value = inp->ip_inp.inp.inp_ip_tos;
4102 tos_value |= sctp_get_ect(stcb);
4104 if ((nofragment_flag) && (port == 0)) {
4105 ip->ip_off = htons(IP_DF);
4107 ip->ip_off = htons(0);
4109 /* FreeBSD has a function for ip_id's */
4112 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4113 ip->ip_len = htons(packet_length);
4114 ip->ip_tos = tos_value;
4116 ip->ip_p = IPPROTO_UDP;
4118 ip->ip_p = IPPROTO_SCTP;
4123 memset(&iproute, 0, sizeof(iproute));
4124 memcpy(&ro->ro_dst, to, to->sa_len);
4126 ro = (sctp_route_t *) & net->ro;
4128 /* Now the address selection part */
4129 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4131 /* call the routine to select the src address */
4132 if (net && out_of_asoc_ok == 0) {
4133 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4134 sctp_free_ifa(net->ro._s_addr);
4135 net->ro._s_addr = NULL;
4136 net->src_addr_selected = 0;
4142 if (net->src_addr_selected == 0) {
4143 /* Cache the source address */
4144 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4147 net->src_addr_selected = 1;
4149 if (net->ro._s_addr == NULL) {
4150 /* No route to host */
4151 net->src_addr_selected = 0;
4152 sctp_handle_no_route(stcb, net, so_locked);
4153 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4155 return (EHOSTUNREACH);
4157 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4159 if (over_addr == NULL) {
4160 struct sctp_ifa *_lsrc;
4162 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4166 if (_lsrc == NULL) {
4167 sctp_handle_no_route(stcb, net, so_locked);
4168 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4170 return (EHOSTUNREACH);
4172 ip->ip_src = _lsrc->address.sin.sin_addr;
4173 sctp_free_ifa(_lsrc);
4175 ip->ip_src = over_addr->sin.sin_addr;
4176 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4180 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4181 sctp_handle_no_route(stcb, net, so_locked);
4182 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4184 return (EHOSTUNREACH);
4186 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4187 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4188 udp->uh_dport = port;
4189 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4191 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4195 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4197 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4200 sctphdr->src_port = src_port;
4201 sctphdr->dest_port = dest_port;
4202 sctphdr->v_tag = v_tag;
4203 sctphdr->checksum = 0;
4206 * If source address selection fails and we find no
4207 * route then the ip_output should fail as well with
4208 * a NO_ROUTE_TO_HOST type error. We probably should
4209 * catch that somewhere and abort the association
4210 * right away (assuming this is an INIT being sent).
4212 if (ro->ro_rt == NULL) {
4214 * src addr selection failed to find a route
4215 * (or valid source addr), so we can't get
4216 * there from here (yet)!
4218 sctp_handle_no_route(stcb, net, so_locked);
4219 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4221 return (EHOSTUNREACH);
4223 if (ro != &iproute) {
4224 memcpy(&iproute, ro, sizeof(*ro));
4226 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4227 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4229 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4230 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4233 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4234 /* failed to prepend data, give up */
4235 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4239 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4241 #if defined(SCTP_WITH_NO_CSUM)
4242 SCTP_STAT_INCR(sctps_sendnocrc);
4244 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4245 SCTP_STAT_INCR(sctps_sendswcrc);
4248 SCTP_ENABLE_UDP_CSUM(o_pak);
4251 #if defined(SCTP_WITH_NO_CSUM)
4252 SCTP_STAT_INCR(sctps_sendnocrc);
4254 m->m_pkthdr.csum_flags = CSUM_SCTP;
4255 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4256 SCTP_STAT_INCR(sctps_sendhwcrc);
4259 #ifdef SCTP_PACKET_LOGGING
4260 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4261 sctp_packet_log(o_pak);
4263 /* send it out. table id is taken from stcb */
4264 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4265 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4266 so = SCTP_INP_SO(inp);
4267 SCTP_SOCKET_UNLOCK(so, 0);
4270 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4271 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4272 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4273 atomic_add_int(&stcb->asoc.refcnt, 1);
4274 SCTP_TCB_UNLOCK(stcb);
4275 SCTP_SOCKET_LOCK(so, 0);
4276 SCTP_TCB_LOCK(stcb);
4277 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4280 SCTP_STAT_INCR(sctps_sendpackets);
4281 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4283 SCTP_STAT_INCR(sctps_senderrors);
4285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4287 /* free tempy routes */
4291 * PMTU check versus smallest asoc MTU goes
4294 if ((ro->ro_rt != NULL) &&
4295 (net->ro._s_addr)) {
4298 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4300 mtu -= sizeof(struct udphdr);
4302 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4303 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4306 } else if (ro->ro_rt == NULL) {
4307 /* route was freed */
4308 if (net->ro._s_addr &&
4309 net->src_addr_selected) {
4310 sctp_free_ifa(net->ro._s_addr);
4311 net->ro._s_addr = NULL;
4313 net->src_addr_selected = 0;
4322 uint32_t flowlabel, flowinfo;
4323 struct ip6_hdr *ip6h;
4324 struct route_in6 ip6route;
4326 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4328 struct sockaddr_in6 lsa6_storage;
4330 u_short prev_port = 0;
4334 flowlabel = net->flowlabel;
4336 flowlabel = stcb->asoc.default_flowlabel;
4338 flowlabel = inp->sctp_ep.default_flowlabel;
4340 if (flowlabel == 0) {
4342 * This means especially, that it is not set
4343 * at the SCTP layer. So use the value from
4346 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4348 flowlabel &= 0x000fffff;
4349 len = SCTP_MIN_OVERHEAD;
4351 len += sizeof(struct udphdr);
4353 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4356 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4359 SCTP_ALIGN_TO_END(newm, len);
4360 SCTP_BUF_LEN(newm) = len;
4361 SCTP_BUF_NEXT(newm) = m;
4364 m->m_pkthdr.flowid = net->flowid;
4365 M_HASHTYPE_SET(m, net->flowtype);
4367 m->m_pkthdr.flowid = mflowid;
4368 M_HASHTYPE_SET(m, mflowtype);
4370 packet_length = sctp_calculate_len(m);
4372 ip6h = mtod(m, struct ip6_hdr *);
4373 /* protect *sin6 from overwrite */
4374 sin6 = (struct sockaddr_in6 *)to;
4378 /* KAME hack: embed scopeid */
4379 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4380 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4384 memset(&ip6route, 0, sizeof(ip6route));
4385 ro = (sctp_route_t *) & ip6route;
4386 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4388 ro = (sctp_route_t *) & net->ro;
4391 * We assume here that inp_flow is in host byte
4392 * order within the TCB!
4394 if (tos_value == 0) {
4396 * This means especially, that it is not set
4397 * at the SCTP layer. So use the value from
4400 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4404 tos_value |= sctp_get_ect(stcb);
4408 flowinfo |= tos_value;
4410 flowinfo |= flowlabel;
4411 ip6h->ip6_flow = htonl(flowinfo);
4413 ip6h->ip6_nxt = IPPROTO_UDP;
4415 ip6h->ip6_nxt = IPPROTO_SCTP;
4417 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4418 ip6h->ip6_dst = sin6->sin6_addr;
4421 * Add SRC address selection here: we can only reuse
4422 * to a limited degree the kame src-addr-sel, since
4423 * we can try their selection but it may not be
4426 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4427 lsa6_tmp.sin6_family = AF_INET6;
4428 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4430 if (net && out_of_asoc_ok == 0) {
4431 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4432 sctp_free_ifa(net->ro._s_addr);
4433 net->ro._s_addr = NULL;
4434 net->src_addr_selected = 0;
4440 if (net->src_addr_selected == 0) {
4441 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4442 /* KAME hack: embed scopeid */
4443 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4444 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4447 /* Cache the source address */
4448 net->ro._s_addr = sctp_source_address_selection(inp,
4454 (void)sa6_recoverscope(sin6);
4455 net->src_addr_selected = 1;
4457 if (net->ro._s_addr == NULL) {
4458 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4459 net->src_addr_selected = 0;
4460 sctp_handle_no_route(stcb, net, so_locked);
4461 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4463 return (EHOSTUNREACH);
4465 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4467 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4468 /* KAME hack: embed scopeid */
4469 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4470 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4473 if (over_addr == NULL) {
4474 struct sctp_ifa *_lsrc;
4476 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4480 if (_lsrc == NULL) {
4481 sctp_handle_no_route(stcb, net, so_locked);
4482 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4484 return (EHOSTUNREACH);
4486 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4487 sctp_free_ifa(_lsrc);
4489 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4490 SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
4492 (void)sa6_recoverscope(sin6);
4494 lsa6->sin6_port = inp->sctp_lport;
4496 if (ro->ro_rt == NULL) {
4498 * src addr selection failed to find a route
4499 * (or valid source addr), so we can't get
4502 sctp_handle_no_route(stcb, net, so_locked);
4503 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4505 return (EHOSTUNREACH);
4508 * XXX: sa6 may not have a valid sin6_scope_id in
4509 * the non-SCOPEDROUTING case.
4511 bzero(&lsa6_storage, sizeof(lsa6_storage));
4512 lsa6_storage.sin6_family = AF_INET6;
4513 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4514 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4515 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4516 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4521 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4522 lsa6_storage.sin6_port = inp->sctp_lport;
4523 lsa6 = &lsa6_storage;
4524 ip6h->ip6_src = lsa6->sin6_addr;
4527 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4528 sctp_handle_no_route(stcb, net, so_locked);
4529 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4531 return (EHOSTUNREACH);
4533 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4534 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4535 udp->uh_dport = port;
4536 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4538 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4540 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4543 sctphdr->src_port = src_port;
4544 sctphdr->dest_port = dest_port;
4545 sctphdr->v_tag = v_tag;
4546 sctphdr->checksum = 0;
4549 * We set the hop limit now since there is a good
4550 * chance that our ro pointer is now filled
4552 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4553 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4556 /* Copy to be sure something bad is not happening */
4557 sin6->sin6_addr = ip6h->ip6_dst;
4558 lsa6->sin6_addr = ip6h->ip6_src;
4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4562 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4563 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4565 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4567 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4569 * preserve the port and scope for link
4572 prev_scope = sin6->sin6_scope_id;
4573 prev_port = sin6->sin6_port;
4575 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4576 /* failed to prepend data, give up */
4578 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4581 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4583 #if defined(SCTP_WITH_NO_CSUM)
4584 SCTP_STAT_INCR(sctps_sendnocrc);
4586 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4587 SCTP_STAT_INCR(sctps_sendswcrc);
4589 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4590 udp->uh_sum = 0xffff;
4593 #if defined(SCTP_WITH_NO_CSUM)
4594 SCTP_STAT_INCR(sctps_sendnocrc);
4596 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4597 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4598 SCTP_STAT_INCR(sctps_sendhwcrc);
4601 /* send it out. table id is taken from stcb */
4602 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4603 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4604 so = SCTP_INP_SO(inp);
4605 SCTP_SOCKET_UNLOCK(so, 0);
4608 #ifdef SCTP_PACKET_LOGGING
4609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4610 sctp_packet_log(o_pak);
4612 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4613 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4614 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4615 atomic_add_int(&stcb->asoc.refcnt, 1);
4616 SCTP_TCB_UNLOCK(stcb);
4617 SCTP_SOCKET_LOCK(so, 0);
4618 SCTP_TCB_LOCK(stcb);
4619 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4623 /* for link local this must be done */
4624 sin6->sin6_scope_id = prev_scope;
4625 sin6->sin6_port = prev_port;
4627 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4628 SCTP_STAT_INCR(sctps_sendpackets);
4629 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4631 SCTP_STAT_INCR(sctps_senderrors);
4634 /* Now if we had a temp route free it */
4638 * PMTU check versus smallest asoc MTU goes
4641 if (ro->ro_rt == NULL) {
4642 /* Route was freed */
4643 if (net->ro._s_addr &&
4644 net->src_addr_selected) {
4645 sctp_free_ifa(net->ro._s_addr);
4646 net->ro._s_addr = NULL;
4648 net->src_addr_selected = 0;
4650 if ((ro->ro_rt != NULL) &&
4651 (net->ro._s_addr)) {
4654 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4656 (stcb->asoc.smallest_mtu > mtu)) {
4657 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4660 net->mtu -= sizeof(struct udphdr);
4664 if (ND_IFINFO(ifp)->linkmtu &&
4665 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4666 sctp_mtu_size_reset(inp,
4668 ND_IFINFO(ifp)->linkmtu);
4676 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4677 ((struct sockaddr *)to)->sa_family);
4679 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4686 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4687 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4692 struct mbuf *m, *m_last;
4693 struct sctp_nets *net;
4694 struct sctp_init_chunk *init;
4695 struct sctp_supported_addr_param *sup_addr;
4696 struct sctp_adaptation_layer_indication *ali;
4697 struct sctp_supported_chunk_types_param *pr_supported;
4698 struct sctp_paramhdr *ph;
4699 int cnt_inits_to = 0;
4701 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4703 /* INIT's always go to the primary (and usually ONLY address) */
4704 net = stcb->asoc.primary_destination;
4706 net = TAILQ_FIRST(&stcb->asoc.nets);
4711 /* we confirm any address we send an INIT to */
4712 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4713 (void)sctp_set_primary_addr(stcb, NULL, net);
4715 /* we confirm any address we send an INIT to */
4716 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4718 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4720 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4722 * special hook, if we are sending to link local it will not
4723 * show up in our private address count.
4725 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4729 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4730 /* This case should not happen */
4731 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4734 /* start the INIT timer */
4735 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4737 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4739 /* No memory, INIT timer will re-attempt. */
4740 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4743 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4745 /* Now lets put the chunk header in place */
4746 init = mtod(m, struct sctp_init_chunk *);
4747 /* now the chunk header */
4748 init->ch.chunk_type = SCTP_INITIATION;
4749 init->ch.chunk_flags = 0;
4750 /* fill in later from mbuf we build */
4751 init->ch.chunk_length = 0;
4752 /* place in my tag */
4753 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4754 /* set up some of the credits. */
4755 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4756 SCTP_MINIMAL_RWND));
4757 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4758 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4759 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4761 /* Adaptation layer indication parameter */
4762 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4763 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4764 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4765 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4766 ali->ph.param_length = htons(parameter_len);
4767 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4768 chunk_len += parameter_len;
4771 if (stcb->asoc.ecn_supported == 1) {
4772 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4773 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4774 ph->param_type = htons(SCTP_ECN_CAPABLE);
4775 ph->param_length = htons(parameter_len);
4776 chunk_len += parameter_len;
4778 /* PR-SCTP supported parameter */
4779 if (stcb->asoc.prsctp_supported == 1) {
4780 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4781 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4782 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4783 ph->param_length = htons(parameter_len);
4784 chunk_len += parameter_len;
4786 /* Add NAT friendly parameter. */
4787 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4788 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4789 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4790 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4791 ph->param_length = htons(parameter_len);
4792 chunk_len += parameter_len;
4794 /* And now tell the peer which extensions we support */
4796 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4797 if (stcb->asoc.prsctp_supported == 1) {
4798 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4800 if (stcb->asoc.auth_supported == 1) {
4801 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4803 if (stcb->asoc.asconf_supported == 1) {
4804 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4805 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4807 if (stcb->asoc.reconfig_supported == 1) {
4808 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4810 if (stcb->asoc.nrsack_supported == 1) {
4811 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4813 if (stcb->asoc.pktdrop_supported == 1) {
4814 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4817 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4818 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4819 pr_supported->ph.param_length = htons(parameter_len);
4820 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4821 chunk_len += parameter_len;
4823 /* add authentication parameters */
4824 if (stcb->asoc.auth_supported) {
4825 /* attach RANDOM parameter, if available */
4826 if (stcb->asoc.authinfo.random != NULL) {
4827 struct sctp_auth_random *randp;
4829 if (padding_len > 0) {
4830 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4831 chunk_len += padding_len;
4834 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4835 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4836 /* random key already contains the header */
4837 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4838 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4839 chunk_len += parameter_len;
4841 /* add HMAC_ALGO parameter */
4842 if (stcb->asoc.local_hmacs != NULL) {
4843 struct sctp_auth_hmac_algo *hmacs;
4845 if (padding_len > 0) {
4846 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4847 chunk_len += padding_len;
4850 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4851 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4852 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4853 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4854 hmacs->ph.param_length = htons(parameter_len);
4855 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4856 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4857 chunk_len += parameter_len;
4859 /* add CHUNKS parameter */
4860 if (stcb->asoc.local_auth_chunks != NULL) {
4861 struct sctp_auth_chunk_list *chunks;
4863 if (padding_len > 0) {
4864 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4865 chunk_len += padding_len;
4868 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4869 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4870 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4871 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4872 chunks->ph.param_length = htons(parameter_len);
4873 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4874 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4875 chunk_len += parameter_len;
4878 /* now any cookie time extensions */
4879 if (stcb->asoc.cookie_preserve_req) {
4880 struct sctp_cookie_perserve_param *cookie_preserve;
4882 if (padding_len > 0) {
4883 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4884 chunk_len += padding_len;
4887 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4888 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4889 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4890 cookie_preserve->ph.param_length = htons(parameter_len);
4891 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4892 stcb->asoc.cookie_preserve_req = 0;
4893 chunk_len += parameter_len;
4895 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4898 if (padding_len > 0) {
4899 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4900 chunk_len += padding_len;
4903 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4904 if (stcb->asoc.scope.ipv4_addr_legal) {
4905 parameter_len += (uint16_t) sizeof(uint16_t);
4907 if (stcb->asoc.scope.ipv6_addr_legal) {
4908 parameter_len += (uint16_t) sizeof(uint16_t);
4910 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4911 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4912 sup_addr->ph.param_length = htons(parameter_len);
4914 if (stcb->asoc.scope.ipv4_addr_legal) {
4915 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4917 if (stcb->asoc.scope.ipv6_addr_legal) {
4918 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4920 padding_len = 4 - 2 * i;
4921 chunk_len += parameter_len;
4923 SCTP_BUF_LEN(m) = chunk_len;
4924 /* now the addresses */
4926 * To optimize this we could put the scoping stuff into a structure
4927 * and remove the individual uint8's from the assoc structure. Then
4928 * we could just sifa in the address within the stcb. But for now
4929 * this is a quick hack to get the address stuff teased apart.
4931 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4933 &padding_len, &chunk_len);
4935 init->ch.chunk_length = htons(chunk_len);
4936 if (padding_len > 0) {
4937 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4942 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4943 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4944 (struct sockaddr *)&net->ro._l_addr,
4945 m, 0, NULL, 0, 0, 0, 0,
4946 inp->sctp_lport, stcb->rport, htonl(0),
4950 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4951 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4952 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4956 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4957 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4960 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4961 * being equal to the beginning of the params i.e. (iphlen +
4962 * sizeof(struct sctp_init_msg) parse through the parameters to the
4963 * end of the mbuf verifying that all parameters are known.
4965 * For unknown parameters build and return a mbuf with
4966 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4967 * processing this chunk stop, and set *abort_processing to 1.
4969 * By having param_offset be pre-set to where parameters begin it is
4970 * hoped that this routine may be reused in the future by new
4973 struct sctp_paramhdr *phdr, params;
4975 struct mbuf *mat, *op_err;
4976 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4977 int at, limit, pad_needed;
4978 uint16_t ptype, plen, padded_size;
4981 *abort_processing = 0;
4984 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4987 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4988 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4989 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4990 ptype = ntohs(phdr->param_type);
4991 plen = ntohs(phdr->param_length);
4992 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4993 /* wacked parameter */
4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4997 limit -= SCTP_SIZE32(plen);
4999 * All parameters for all chunks that we know/understand are
5000 * listed here. We process them other places and make
5001 * appropriate stop actions per the upper bits. However this
5002 * is the generic routine processor's can call to get back
5003 * an operr.. to either incorporate (init-ack) or send.
5005 padded_size = SCTP_SIZE32(plen);
5007 /* Param's with variable size */
5008 case SCTP_HEARTBEAT_INFO:
5009 case SCTP_STATE_COOKIE:
5010 case SCTP_UNRECOG_PARAM:
5011 case SCTP_ERROR_CAUSE_IND:
5015 /* Param's with variable size within a range */
5016 case SCTP_CHUNK_LIST:
5017 case SCTP_SUPPORTED_CHUNK_EXT:
5018 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5019 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5024 case SCTP_SUPPORTED_ADDRTYPE:
5025 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5026 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5032 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5033 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5038 case SCTP_SET_PRIM_ADDR:
5039 case SCTP_DEL_IP_ADDRESS:
5040 case SCTP_ADD_IP_ADDRESS:
5041 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5042 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5043 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5048 /* Param's with a fixed size */
5049 case SCTP_IPV4_ADDRESS:
5050 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5056 case SCTP_IPV6_ADDRESS:
5057 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5063 case SCTP_COOKIE_PRESERVE:
5064 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5065 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5070 case SCTP_HAS_NAT_SUPPORT:
5073 case SCTP_PRSCTP_SUPPORTED:
5074 if (padded_size != sizeof(struct sctp_paramhdr)) {
5075 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5080 case SCTP_ECN_CAPABLE:
5081 if (padded_size != sizeof(struct sctp_paramhdr)) {
5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5087 case SCTP_ULP_ADAPTATION:
5088 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5089 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5094 case SCTP_SUCCESS_REPORT:
5095 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5096 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5101 case SCTP_HOSTNAME_ADDRESS:
5103 /* We can NOT handle HOST NAME addresses!! */
5106 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5107 *abort_processing = 1;
5108 if (op_err == NULL) {
5109 /* Ok need to try to get a mbuf */
5111 l_len = SCTP_MIN_OVERHEAD;
5113 l_len = SCTP_MIN_V4_OVERHEAD;
5115 l_len += sizeof(struct sctp_chunkhdr);
5117 l_len += sizeof(struct sctp_paramhdr);
5118 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5120 SCTP_BUF_LEN(op_err) = 0;
5122 * pre-reserve space for ip
5123 * and sctp header and
5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5132 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5136 /* If we have space */
5137 struct sctp_paramhdr s;
5140 uint32_t cpthis = 0;
5142 pad_needed = 4 - (err_at % 4);
5143 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5144 err_at += pad_needed;
5146 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5147 s.param_length = htons(sizeof(s) + plen);
5148 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5149 err_at += sizeof(s);
5150 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5152 sctp_m_freem(op_err);
5154 * we are out of memory but
5155 * we still need to have a
5156 * look at what to do (the
5157 * system is in trouble
5162 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5169 * we do not recognize the parameter figure out what
5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5173 if ((ptype & 0x4000) == 0x4000) {
5174 /* Report bit is set?? */
5175 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5176 if (op_err == NULL) {
5179 /* Ok need to try to get an mbuf */
5181 l_len = SCTP_MIN_OVERHEAD;
5183 l_len = SCTP_MIN_V4_OVERHEAD;
5185 l_len += sizeof(struct sctp_chunkhdr);
5187 l_len += sizeof(struct sctp_paramhdr);
5188 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5190 SCTP_BUF_LEN(op_err) = 0;
5192 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5197 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5201 /* If we have space */
5202 struct sctp_paramhdr s;
5205 uint32_t cpthis = 0;
5207 pad_needed = 4 - (err_at % 4);
5208 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5209 err_at += pad_needed;
5211 s.param_type = htons(SCTP_UNRECOG_PARAM);
5212 s.param_length = htons(sizeof(s) + plen);
5213 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5214 err_at += sizeof(s);
5215 if (plen > sizeof(tempbuf)) {
5216 plen = sizeof(tempbuf);
5218 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5220 sctp_m_freem(op_err);
5222 * we are out of memory but
5223 * we still need to have a
5224 * look at what to do (the
5225 * system is in trouble
5229 goto more_processing;
5231 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5236 if ((ptype & 0x8000) == 0x0000) {
5237 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5240 /* skip this chunk and continue processing */
5241 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5242 at += SCTP_SIZE32(plen);
5247 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5251 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5252 *abort_processing = 1;
5253 if ((op_err == NULL) && phdr) {
5257 l_len = SCTP_MIN_OVERHEAD;
5259 l_len = SCTP_MIN_V4_OVERHEAD;
5261 l_len += sizeof(struct sctp_chunkhdr);
5262 l_len += (2 * sizeof(struct sctp_paramhdr));
5263 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5265 SCTP_BUF_LEN(op_err) = 0;
5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5271 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5272 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5275 if ((op_err) && phdr) {
5276 struct sctp_paramhdr s;
5279 uint32_t cpthis = 0;
5281 pad_needed = 4 - (err_at % 4);
5282 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5283 err_at += pad_needed;
5285 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5286 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5287 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5288 err_at += sizeof(s);
5289 /* Only copy back the p-hdr that caused the issue */
5290 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5296 sctp_are_there_new_addresses(struct sctp_association *asoc,
5297 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5300 * Given a INIT packet, look through the packet to verify that there
5301 * are NO new addresses. As we go through the parameters add reports
5302 * of any un-understood parameters that require an error. Also we
5303 * must return (1) to drop the packet if we see a un-understood
5304 * parameter that tells us to drop the chunk.
5306 struct sockaddr *sa_touse;
5307 struct sockaddr *sa;
5308 struct sctp_paramhdr *phdr, params;
5309 uint16_t ptype, plen;
5311 struct sctp_nets *net;
5315 struct sockaddr_in sin4, *sa4;
5319 struct sockaddr_in6 sin6, *sa6;
5324 memset(&sin4, 0, sizeof(sin4));
5325 sin4.sin_family = AF_INET;
5326 sin4.sin_len = sizeof(sin4);
5329 memset(&sin6, 0, sizeof(sin6));
5330 sin6.sin6_family = AF_INET6;
5331 sin6.sin6_len = sizeof(sin6);
5333 /* First what about the src address of the pkt ? */
5335 switch (src->sa_family) {
5338 if (asoc->scope.ipv4_addr_legal) {
5345 if (asoc->scope.ipv6_addr_legal) {
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. */
5390 /* Ok so far lets munge through the rest of the packet */
5391 offset += sizeof(struct sctp_init_chunk);
5392 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5395 ptype = ntohs(phdr->param_type);
5396 plen = ntohs(phdr->param_length);
5399 case SCTP_IPV4_ADDRESS:
5401 struct sctp_ipv4addr_param *p4, p4_buf;
5403 phdr = sctp_get_next_param(in_initpkt, offset,
5404 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5405 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5409 if (asoc->scope.ipv4_addr_legal) {
5410 p4 = (struct sctp_ipv4addr_param *)phdr;
5411 sin4.sin_addr.s_addr = p4->addr;
5412 sa_touse = (struct sockaddr *)&sin4;
5418 case SCTP_IPV6_ADDRESS:
5420 struct sctp_ipv6addr_param *p6, p6_buf;
5422 phdr = sctp_get_next_param(in_initpkt, offset,
5423 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5424 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5428 if (asoc->scope.ipv6_addr_legal) {
5429 p6 = (struct sctp_ipv6addr_param *)phdr;
5430 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5432 sa_touse = (struct sockaddr *)&sin6;
5442 /* ok, sa_touse points to one to check */
5444 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5445 sa = (struct sockaddr *)&net->ro._l_addr;
5446 if (sa->sa_family != sa_touse->sa_family) {
5450 if (sa->sa_family == AF_INET) {
5451 sa4 = (struct sockaddr_in *)sa;
5452 if (sa4->sin_addr.s_addr ==
5453 sin4.sin_addr.s_addr) {
5460 if (sa->sa_family == AF_INET6) {
5461 sa6 = (struct sockaddr_in6 *)sa;
5462 if (SCTP6_ARE_ADDR_EQUAL(
5471 /* New addr added! no need to look further */
5475 offset += SCTP_SIZE32(plen);
5476 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5482 * Given a MBUF chain that was sent into us containing an INIT. Build a
5483 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5484 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5485 * message (i.e. the struct sctp_init_msg).
5488 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5489 struct sctp_nets *src_net, struct mbuf *init_pkt,
5490 int iphlen, int offset,
5491 struct sockaddr *src, struct sockaddr *dst,
5492 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5493 uint8_t mflowtype, uint32_t mflowid,
5494 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5496 struct sctp_association *asoc;
5497 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5498 struct sctp_init_ack_chunk *initack;
5499 struct sctp_adaptation_layer_indication *ali;
5500 struct sctp_supported_chunk_types_param *pr_supported;
5501 struct sctp_paramhdr *ph;
5502 union sctp_sockstore *over_addr;
5503 struct sctp_scoping scp;
5506 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5507 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5508 struct sockaddr_in *sin;
5512 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5513 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5514 struct sockaddr_in6 *sin6;
5517 struct sockaddr *to;
5518 struct sctp_state_cookie stc;
5519 struct sctp_nets *net = NULL;
5520 uint8_t *signature = NULL;
5521 int cnt_inits_to = 0;
5522 uint16_t his_limit, i_want;
5524 int nat_friendly = 0;
5526 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5533 if ((asoc != NULL) &&
5534 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) {
5535 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) {
5537 * new addresses, out of here in non-cookie-wait
5540 * Send an ABORT, without the new address error cause.
5541 * This looks no different than if no listener was
5544 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5546 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5547 mflowtype, mflowid, inp->fibnum,
5551 if (src_net != NULL && (src_net->port != port)) {
5553 * change of remote encapsulation port, out of here
5554 * in non-cookie-wait states
5556 * Send an ABORT, without an specific error cause. This
5557 * looks no different than if no listener was
5560 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5561 "Remote encapsulation port changed");
5562 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5563 mflowtype, mflowid, inp->fibnum,
5569 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5570 (offset + sizeof(struct sctp_init_chunk)),
5571 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5574 if (op_err == NULL) {
5575 char msg[SCTP_DIAG_INFO_LEN];
5577 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
5578 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5581 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5582 init_chk->init.initiate_tag, op_err,
5583 mflowtype, mflowid, inp->fibnum,
5587 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5589 /* No memory, INIT timer will re-attempt. */
5591 sctp_m_freem(op_err);
5594 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5598 * We might not overwrite the identification[] completely and on
5599 * some platforms time_entered will contain some padding. Therefore
5600 * zero out the cookie to avoid putting uninitialized memory on the
5603 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5605 /* the time I built cookie */
5606 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5608 /* populate any tie tags */
5610 /* unlock before tag selections */
5611 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5612 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5613 stc.cookie_life = asoc->cookie_life;
5614 net = asoc->primary_destination;
5616 stc.tie_tag_my_vtag = 0;
5617 stc.tie_tag_peer_vtag = 0;
5618 /* life I will award this cookie */
5619 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5622 /* copy in the ports for later check */
5623 stc.myport = sh->dest_port;
5624 stc.peerport = sh->src_port;
5627 * If we wanted to honor cookie life extentions, we would add to
5628 * stc.cookie_life. For now we should NOT honor any extension
5630 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5631 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5632 stc.ipv6_addr_legal = 1;
5633 if (SCTP_IPV6_V6ONLY(inp)) {
5634 stc.ipv4_addr_legal = 0;
5636 stc.ipv4_addr_legal = 1;
5639 stc.ipv6_addr_legal = 0;
5640 stc.ipv4_addr_legal = 1;
5645 switch (dst->sa_family) {
5649 /* lookup address */
5650 stc.address[0] = src4->sin_addr.s_addr;
5654 stc.addr_type = SCTP_IPV4_ADDRESS;
5655 /* local from address */
5656 stc.laddress[0] = dst4->sin_addr.s_addr;
5657 stc.laddress[1] = 0;
5658 stc.laddress[2] = 0;
5659 stc.laddress[3] = 0;
5660 stc.laddr_type = SCTP_IPV4_ADDRESS;
5661 /* scope_id is only for v6 */
5663 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5664 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5667 /* Must use the address in this case */
5668 if (sctp_is_address_on_local_host(src, vrf_id)) {
5669 stc.loopback_scope = 1;
5672 stc.local_scope = 0;
5680 stc.addr_type = SCTP_IPV6_ADDRESS;
5681 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5682 stc.scope_id = in6_getscope(&src6->sin6_addr);
5683 if (sctp_is_address_on_local_host(src, vrf_id)) {
5684 stc.loopback_scope = 1;
5685 stc.local_scope = 0;
5688 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5689 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5691 * If the new destination or source
5692 * is a LINK_LOCAL we must have
5693 * common both site and local scope.
5694 * Don't set local scope though
5695 * since we must depend on the
5696 * source to be added implicitly. We
5697 * cannot assure just because we
5698 * share one link that all links are
5701 stc.local_scope = 0;
5705 * we start counting for the private
5706 * address stuff at 1. since the
5707 * link local we source from won't
5708 * show up in our scoped count.
5712 * pull out the scope_id from
5715 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5716 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5718 * If the new destination or source
5719 * is SITE_LOCAL then we must have
5720 * site scope in common.
5724 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5725 stc.laddr_type = SCTP_IPV6_ADDRESS;
5735 /* set the scope per the existing tcb */
5738 struct sctp_nets *lnet;
5742 stc.loopback_scope = asoc->scope.loopback_scope;
5743 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5744 stc.site_scope = asoc->scope.site_scope;
5745 stc.local_scope = asoc->scope.local_scope;
5747 /* Why do we not consider IPv4 LL addresses? */
5748 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5749 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5750 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5752 * if we have a LL address, start
5760 /* use the net pointer */
5761 to = (struct sockaddr *)&net->ro._l_addr;
5762 switch (to->sa_family) {
5765 sin = (struct sockaddr_in *)to;
5766 stc.address[0] = sin->sin_addr.s_addr;
5770 stc.addr_type = SCTP_IPV4_ADDRESS;
5771 if (net->src_addr_selected == 0) {
5773 * strange case here, the INIT should have
5774 * did the selection.
5776 net->ro._s_addr = sctp_source_address_selection(inp,
5777 stcb, (sctp_route_t *) & net->ro,
5779 if (net->ro._s_addr == NULL)
5782 net->src_addr_selected = 1;
5785 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5786 stc.laddress[1] = 0;
5787 stc.laddress[2] = 0;
5788 stc.laddress[3] = 0;
5789 stc.laddr_type = SCTP_IPV4_ADDRESS;
5790 /* scope_id is only for v6 */
5796 sin6 = (struct sockaddr_in6 *)to;
5797 memcpy(&stc.address, &sin6->sin6_addr,
5798 sizeof(struct in6_addr));
5799 stc.addr_type = SCTP_IPV6_ADDRESS;
5800 stc.scope_id = sin6->sin6_scope_id;
5801 if (net->src_addr_selected == 0) {
5803 * strange case here, the INIT should have
5804 * done the selection.
5806 net->ro._s_addr = sctp_source_address_selection(inp,
5807 stcb, (sctp_route_t *) & net->ro,
5809 if (net->ro._s_addr == NULL)
5812 net->src_addr_selected = 1;
5814 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5815 sizeof(struct in6_addr));
5816 stc.laddr_type = SCTP_IPV6_ADDRESS;
5821 /* Now lets put the SCTP header in place */
5822 initack = mtod(m, struct sctp_init_ack_chunk *);
5823 /* Save it off for quick ref */
5824 stc.peers_vtag = init_chk->init.initiate_tag;
5826 memcpy(stc.identification, SCTP_VERSION_STRING,
5827 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5828 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5829 /* now the chunk header */
5830 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5831 initack->ch.chunk_flags = 0;
5832 /* fill in later from mbuf we build */
5833 initack->ch.chunk_length = 0;
5834 /* place in my tag */
5835 if ((asoc != NULL) &&
5836 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5837 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5838 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5839 /* re-use the v-tags and init-seq here */
5840 initack->init.initiate_tag = htonl(asoc->my_vtag);
5841 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5843 uint32_t vtag, itsn;
5845 if (hold_inp_lock) {
5846 SCTP_INP_INCR_REF(inp);
5847 SCTP_INP_RUNLOCK(inp);
5850 atomic_add_int(&asoc->refcnt, 1);
5851 SCTP_TCB_UNLOCK(stcb);
5853 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5854 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5856 * Got a duplicate vtag on some guy behind a
5857 * nat make sure we don't use it.
5861 initack->init.initiate_tag = htonl(vtag);
5862 /* get a TSN to use too */
5863 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5864 initack->init.initial_tsn = htonl(itsn);
5865 SCTP_TCB_LOCK(stcb);
5866 atomic_add_int(&asoc->refcnt, -1);
5868 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5869 initack->init.initiate_tag = htonl(vtag);
5870 /* get a TSN to use too */
5871 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5873 if (hold_inp_lock) {
5874 SCTP_INP_RLOCK(inp);
5875 SCTP_INP_DECR_REF(inp);
5878 /* save away my tag to */
5879 stc.my_vtag = initack->init.initiate_tag;
5881 /* set up some of the credits. */
5882 so = inp->sctp_socket;
5884 /* memory problem */
5888 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5890 /* set what I want */
5891 his_limit = ntohs(init_chk->init.num_inbound_streams);
5892 /* choose what I want */
5894 if (asoc->streamoutcnt > asoc->pre_open_streams) {
5895 i_want = asoc->streamoutcnt;
5897 i_want = asoc->pre_open_streams;
5900 i_want = inp->sctp_ep.pre_open_stream_count;
5902 if (his_limit < i_want) {
5903 /* I Want more :< */
5904 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5906 /* I can have what I want :> */
5907 initack->init.num_outbound_streams = htons(i_want);
5909 /* tell him his limit. */
5910 initack->init.num_inbound_streams =
5911 htons(inp->sctp_ep.max_open_streams_intome);
5913 /* adaptation layer indication parameter */
5914 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5915 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5916 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5917 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5918 ali->ph.param_length = htons(parameter_len);
5919 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5920 chunk_len += parameter_len;
5923 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5924 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5925 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5926 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5927 ph->param_type = htons(SCTP_ECN_CAPABLE);
5928 ph->param_length = htons(parameter_len);
5929 chunk_len += parameter_len;
5931 /* PR-SCTP supported parameter */
5932 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5933 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5934 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5935 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5936 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5937 ph->param_length = htons(parameter_len);
5938 chunk_len += parameter_len;
5940 /* Add NAT friendly parameter */
5942 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5943 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5944 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5945 ph->param_length = htons(parameter_len);
5946 chunk_len += parameter_len;
5948 /* And now tell the peer which extensions we support */
5950 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5951 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5952 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5953 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5955 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5956 ((asoc == NULL) && (inp->auth_supported == 1))) {
5957 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5959 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5960 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5961 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5962 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5964 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5965 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5966 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5968 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5969 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5970 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5972 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5973 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5974 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5977 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5978 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5979 pr_supported->ph.param_length = htons(parameter_len);
5980 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5981 chunk_len += parameter_len;
5983 /* add authentication parameters */
5984 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5985 ((asoc == NULL) && (inp->auth_supported == 1))) {
5986 struct sctp_auth_random *randp;
5987 struct sctp_auth_hmac_algo *hmacs;
5988 struct sctp_auth_chunk_list *chunks;
5990 if (padding_len > 0) {
5991 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5992 chunk_len += padding_len;
5995 /* generate and add RANDOM parameter */
5996 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5997 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5998 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5999 randp->ph.param_type = htons(SCTP_RANDOM);
6000 randp->ph.param_length = htons(parameter_len);
6001 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
6002 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6003 chunk_len += parameter_len;
6005 if (padding_len > 0) {
6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6007 chunk_len += padding_len;
6010 /* add HMAC_ALGO parameter */
6011 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
6012 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
6013 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
6014 (uint8_t *) hmacs->hmac_ids);
6015 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
6016 hmacs->ph.param_length = htons(parameter_len);
6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6018 chunk_len += parameter_len;
6020 if (padding_len > 0) {
6021 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6022 chunk_len += padding_len;
6025 /* add CHUNKS parameter */
6026 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
6027 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
6028 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
6029 chunks->chunk_types);
6030 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
6031 chunks->ph.param_length = htons(parameter_len);
6032 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6033 chunk_len += parameter_len;
6035 SCTP_BUF_LEN(m) = chunk_len;
6037 /* now the addresses */
6039 * To optimize this we could put the scoping stuff into a structure
6040 * and remove the individual uint8's from the stc structure. Then we
6041 * could just sifa in the address within the stc.. but for now this
6042 * is a quick hack to get the address stuff teased apart.
6044 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
6045 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
6046 scp.loopback_scope = stc.loopback_scope;
6047 scp.ipv4_local_scope = stc.ipv4_scope;
6048 scp.local_scope = stc.local_scope;
6049 scp.site_scope = stc.site_scope;
6050 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6052 &padding_len, &chunk_len);
6053 /* padding_len can only be positive, if no addresses have been added */
6054 if (padding_len > 0) {
6055 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6056 chunk_len += padding_len;
6057 SCTP_BUF_LEN(m) += padding_len;
6060 /* tack on the operational error if present */
6063 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6064 parameter_len += SCTP_BUF_LEN(m_tmp);
6066 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6067 SCTP_BUF_NEXT(m_last) = op_err;
6068 while (SCTP_BUF_NEXT(m_last) != NULL) {
6069 m_last = SCTP_BUF_NEXT(m_last);
6071 chunk_len += parameter_len;
6073 if (padding_len > 0) {
6074 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6075 if (m_last == NULL) {
6076 /* Houston we have a problem, no space */
6080 chunk_len += padding_len;
6083 /* Now we must build a cookie */
6084 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6085 if (m_cookie == NULL) {
6086 /* memory problem */
6090 /* Now append the cookie to the end and update the space/size */
6091 SCTP_BUF_NEXT(m_last) = m_cookie;
6093 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6094 parameter_len += SCTP_BUF_LEN(m_tmp);
6095 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6099 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6100 chunk_len += parameter_len;
6103 * Place in the size, but we don't include the last pad (if any) in
6106 initack->ch.chunk_length = htons(chunk_len);
6109 * Time to sign the cookie, we don't sign over the cookie signature
6110 * though thus we set trailer.
6112 (void)sctp_hmac_m(SCTP_HMAC,
6113 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6114 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6115 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6117 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6118 * here since the timer will drive a retranmission.
6120 if (padding_len > 0) {
6121 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6126 if (stc.loopback_scope) {
6127 over_addr = (union sctp_sockstore *)dst;
6132 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6134 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6137 SCTP_SO_NOT_LOCKED);
6138 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6143 sctp_prune_prsctp(struct sctp_tcb *stcb,
6144 struct sctp_association *asoc,
6145 struct sctp_sndrcvinfo *srcv,
6149 struct sctp_tmit_chunk *chk, *nchk;
6151 SCTP_TCB_LOCK_ASSERT(stcb);
6152 if ((asoc->prsctp_supported) &&
6153 (asoc->sent_queue_cnt_removeable > 0)) {
6154 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6156 * Look for chunks marked with the PR_SCTP flag AND
6157 * the buffer space flag. If the one being sent is
6158 * equal or greater priority then purge the old one
6159 * and free some space.
6161 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6163 * This one is PR-SCTP AND buffer space
6166 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6168 * Lower numbers equates to higher
6169 * priority so if the one we are
6170 * looking at has a larger or equal
6171 * priority we want to drop the data
6172 * and NOT retransmit it.
6176 * We release the book_size
6177 * if the mbuf is here
6182 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6186 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6189 freed_spc += ret_spc;
6190 if (freed_spc >= dataout) {
6193 } /* if chunk was present */
6194 } /* if of sufficent priority */
6195 } /* if chunk has enabled */
6196 } /* tailqforeach */
6198 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6199 /* Here we must move to the sent queue and mark */
6200 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6201 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6204 * We release the book_size
6205 * if the mbuf is here
6209 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6212 freed_spc += ret_spc;
6213 if (freed_spc >= dataout) {
6216 } /* end if chk->data */
6217 } /* end if right class */
6218 } /* end if chk pr-sctp */
6219 } /* tailqforeachsafe (chk) */
6220 } /* if enabled in asoc */
6224 sctp_get_frag_point(struct sctp_tcb *stcb,
6225 struct sctp_association *asoc)
6230 * For endpoints that have both v6 and v4 addresses we must reserve
6231 * room for the ipv6 header, for those that are only dealing with V4
6232 * we use a larger frag point.
6234 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6235 ovh = SCTP_MED_OVERHEAD;
6237 ovh = SCTP_MED_V4_OVERHEAD;
6240 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6241 siz = asoc->smallest_mtu - ovh;
6243 siz = (stcb->asoc.sctp_frag_point - ovh);
6245 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6247 /* A data chunk MUST fit in a cluster */
6248 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6251 /* adjust for an AUTH chunk if DATA requires auth */
6252 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6253 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6256 /* make it an even word boundary please */
6263 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6266 * We assume that the user wants PR_SCTP_TTL if the user provides a
6267 * positive lifetime but does not specify any PR_SCTP policy.
6269 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6270 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6271 } else if (sp->timetolive > 0) {
6272 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6273 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6277 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6278 case CHUNK_FLAGS_PR_SCTP_BUF:
6280 * Time to live is a priority stored in tv_sec when doing
6281 * the buffer drop thing.
6283 sp->ts.tv_sec = sp->timetolive;
6286 case CHUNK_FLAGS_PR_SCTP_TTL:
6290 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6291 tv.tv_sec = sp->timetolive / 1000;
6292 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6294 * TODO sctp_constants.h needs alternative time
6295 * macros when _KERNEL is undefined.
6297 timevaladd(&sp->ts, &tv);
6300 case CHUNK_FLAGS_PR_SCTP_RTX:
6302 * Time to live is a the number or retransmissions stored in
6305 sp->ts.tv_sec = sp->timetolive;
6309 SCTPDBG(SCTP_DEBUG_USRREQ1,
6310 "Unknown PR_SCTP policy %u.\n",
6311 PR_SCTP_POLICY(sp->sinfo_flags));
6317 sctp_msg_append(struct sctp_tcb *stcb,
6318 struct sctp_nets *net,
6320 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6324 struct sctp_stream_queue_pending *sp = NULL;
6325 struct sctp_stream_out *strm;
6328 * Given an mbuf chain, put it into the association send queue and
6329 * place it on the wheel
6331 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6332 /* Invalid stream number */
6333 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6337 if ((stcb->asoc.stream_locked) &&
6338 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6339 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6343 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6344 /* Now can we send this? */
6345 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6346 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6347 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6348 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6349 /* got data while shutting down */
6350 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6354 sctp_alloc_a_strmoq(stcb, sp);
6356 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6360 sp->sinfo_flags = srcv->sinfo_flags;
6361 sp->timetolive = srcv->sinfo_timetolive;
6362 sp->ppid = srcv->sinfo_ppid;
6363 sp->context = srcv->sinfo_context;
6364 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6366 atomic_add_int(&sp->net->ref_count, 1);
6370 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6371 sp->stream = srcv->sinfo_stream;
6372 sp->msg_is_complete = 1;
6373 sp->sender_all_done = 1;
6376 sp->tail_mbuf = NULL;
6377 sctp_set_prsctp_policy(sp);
6379 * We could in theory (for sendall) sifa the length in, but we would
6380 * still have to hunt through the chain since we need to setup the
6384 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6385 if (SCTP_BUF_NEXT(at) == NULL)
6387 sp->length += SCTP_BUF_LEN(at);
6389 if (srcv->sinfo_keynumber_valid) {
6390 sp->auth_keyid = srcv->sinfo_keynumber;
6392 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6394 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6395 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6396 sp->holds_key_ref = 1;
6398 if (hold_stcb_lock == 0) {
6399 SCTP_TCB_SEND_LOCK(stcb);
6401 sctp_snd_sb_alloc(stcb, sp->length);
6402 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6403 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6404 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6406 if (hold_stcb_lock == 0) {
6407 SCTP_TCB_SEND_UNLOCK(stcb);
6417 static struct mbuf *
6418 sctp_copy_mbufchain(struct mbuf *clonechain,
6419 struct mbuf *outchain,
6420 struct mbuf **endofchain,
6423 uint8_t copy_by_ref)
6426 struct mbuf *appendchain;
6430 if (endofchain == NULL) {
6434 sctp_m_freem(outchain);
6437 if (can_take_mbuf) {
6438 appendchain = clonechain;
6441 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6443 /* Its not in a cluster */
6444 if (*endofchain == NULL) {
6445 /* lets get a mbuf cluster */
6446 if (outchain == NULL) {
6447 /* This is the general case */
6449 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6450 if (outchain == NULL) {
6453 SCTP_BUF_LEN(outchain) = 0;
6454 *endofchain = outchain;
6455 /* get the prepend space */
6456 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6459 * We really should not get a NULL
6465 if (SCTP_BUF_NEXT(m) == NULL) {
6469 m = SCTP_BUF_NEXT(m);
6472 if (*endofchain == NULL) {
6474 * huh, TSNH XXX maybe we
6477 sctp_m_freem(outchain);
6481 /* get the new end of length */
6482 len = M_TRAILINGSPACE(*endofchain);
6484 /* how much is left at the end? */
6485 len = M_TRAILINGSPACE(*endofchain);
6487 /* Find the end of the data, for appending */
6488 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6490 /* Now lets copy it out */
6491 if (len >= sizeofcpy) {
6492 /* It all fits, copy it in */
6493 m_copydata(clonechain, 0, sizeofcpy, cp);
6494 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6496 /* fill up the end of the chain */
6498 m_copydata(clonechain, 0, len, cp);
6499 SCTP_BUF_LEN((*endofchain)) += len;
6500 /* now we need another one */
6503 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6508 SCTP_BUF_NEXT((*endofchain)) = m;
6510 cp = mtod((*endofchain), caddr_t);
6511 m_copydata(clonechain, len, sizeofcpy, cp);
6512 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6516 /* copy the old fashion way */
6517 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6518 #ifdef SCTP_MBUF_LOGGING
6519 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6520 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6525 if (appendchain == NULL) {
6528 sctp_m_freem(outchain);
6532 /* tack on to the end */
6533 if (*endofchain != NULL) {
6534 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6538 if (SCTP_BUF_NEXT(m) == NULL) {
6539 SCTP_BUF_NEXT(m) = appendchain;
6542 m = SCTP_BUF_NEXT(m);
6546 * save off the end and update the end-chain postion
6550 if (SCTP_BUF_NEXT(m) == NULL) {
6554 m = SCTP_BUF_NEXT(m);
6558 /* save off the end and update the end-chain postion */
6561 if (SCTP_BUF_NEXT(m) == NULL) {
6565 m = SCTP_BUF_NEXT(m);
6567 return (appendchain);
6572 sctp_med_chunk_output(struct sctp_inpcb *inp,
6573 struct sctp_tcb *stcb,
6574 struct sctp_association *asoc,
6577 int control_only, int from_where,
6578 struct timeval *now, int *now_filled, int frag_point, int so_locked
6579 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6585 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6586 uint32_t val SCTP_UNUSED)
6588 struct sctp_copy_all *ca;
6591 int added_control = 0;
6592 int un_sent, do_chunk_output = 1;
6593 struct sctp_association *asoc;
6594 struct sctp_nets *net;
6596 ca = (struct sctp_copy_all *)ptr;
6597 if (ca->m == NULL) {
6600 if (ca->inp != inp) {
6604 if (ca->sndlen > 0) {
6605 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6607 /* can't copy so we are done */
6611 #ifdef SCTP_MBUF_LOGGING
6612 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6613 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6619 SCTP_TCB_LOCK_ASSERT(stcb);
6620 if (stcb->asoc.alternate) {
6621 net = stcb->asoc.alternate;
6623 net = stcb->asoc.primary_destination;
6625 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6626 /* Abort this assoc with m as the user defined reason */
6628 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6630 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6631 0, M_NOWAIT, 1, MT_DATA);
6632 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6635 struct sctp_paramhdr *ph;
6637 ph = mtod(m, struct sctp_paramhdr *);
6638 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6639 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6642 * We add one here to keep the assoc from dis-appearing on
6645 atomic_add_int(&stcb->asoc.refcnt, 1);
6646 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6648 * sctp_abort_an_association calls sctp_free_asoc() free
6649 * association will NOT free it since we incremented the
6650 * refcnt .. we do this to prevent it being freed and things
6651 * getting tricky since we could end up (from free_asoc)
6652 * calling inpcb_free which would get a recursive lock call
6653 * to the iterator lock.. But as a consequence of that the
6654 * stcb will return to us un-locked.. since free_asoc
6655 * returns with either no TCB or the TCB unlocked, we must
6656 * relock.. to unlock in the iterator timer :-0
6658 SCTP_TCB_LOCK(stcb);
6659 atomic_add_int(&stcb->asoc.refcnt, -1);
6660 goto no_chunk_output;
6663 ret = sctp_msg_append(stcb, net, m,
6667 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6668 /* shutdown this assoc */
6671 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6673 if (TAILQ_EMPTY(&asoc->send_queue) &&
6674 TAILQ_EMPTY(&asoc->sent_queue) &&
6676 if (asoc->locked_on_sending) {
6680 * there is nothing queued to send, so I'm
6683 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6684 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6685 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6687 * only send SHUTDOWN the first time
6690 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6691 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6693 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6694 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6695 sctp_stop_timers_for_shutdown(stcb);
6696 sctp_send_shutdown(stcb, net);
6697 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6699 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6700 asoc->primary_destination);
6702 do_chunk_output = 0;
6706 * we still got (or just got) data to send,
6707 * so set SHUTDOWN_PENDING
6710 * XXX sockets draft says that SCTP_EOF
6711 * should be sent with no data. currently,
6712 * we will allow user data to be sent first
6713 * and move to SHUTDOWN-PENDING
6715 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6716 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6717 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6718 if (asoc->locked_on_sending) {
6720 * Locked to send out the
6723 struct sctp_stream_queue_pending *sp;
6725 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6727 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6728 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6731 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6732 if (TAILQ_EMPTY(&asoc->send_queue) &&
6733 TAILQ_EMPTY(&asoc->sent_queue) &&
6734 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6735 struct mbuf *op_err;
6736 char msg[SCTP_DIAG_INFO_LEN];
6739 snprintf(msg, sizeof(msg),
6740 "%s:%d at %s", __FILE__, __LINE__, __func__);
6741 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6743 atomic_add_int(&stcb->asoc.refcnt, 1);
6744 sctp_abort_an_association(stcb->sctp_ep, stcb,
6745 op_err, SCTP_SO_NOT_LOCKED);
6746 atomic_add_int(&stcb->asoc.refcnt, -1);
6747 goto no_chunk_output;
6749 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6750 asoc->primary_destination);
6756 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6757 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6759 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6760 (stcb->asoc.total_flight > 0) &&
6761 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6762 do_chunk_output = 0;
6764 if (do_chunk_output)
6765 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6766 else if (added_control) {
6767 int num_out, reason, now_filled = 0;
6771 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6772 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6773 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6784 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6786 struct sctp_copy_all *ca;
6788 ca = (struct sctp_copy_all *)ptr;
6790 * Do a notify here? Kacheong suggests that the notify be done at
6791 * the send time.. so you would push up a notification if any send
6792 * failed. Don't know if this is feasable since the only failures we
6793 * have is "memory" related and if you cannot get an mbuf to send
6794 * the data you surely can't get an mbuf to send up to notify the
6795 * user you can't send the data :->
6798 /* now free everything */
6799 sctp_m_freem(ca->m);
6800 SCTP_FREE(ca, SCTP_M_COPYAL);
6803 static struct mbuf *
6804 sctp_copy_out_all(struct uio *uio, int len)
6806 struct mbuf *ret, *at;
6807 int left, willcpy, cancpy, error;
6809 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6815 SCTP_BUF_LEN(ret) = 0;
6816 /* save space for the data chunk header */
6817 cancpy = M_TRAILINGSPACE(ret);
6818 willcpy = min(cancpy, left);
6821 /* Align data to the end */
6822 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6828 SCTP_BUF_LEN(at) = willcpy;
6829 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6832 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6833 if (SCTP_BUF_NEXT(at) == NULL) {
6836 at = SCTP_BUF_NEXT(at);
6837 SCTP_BUF_LEN(at) = 0;
6838 cancpy = M_TRAILINGSPACE(at);
6839 willcpy = min(cancpy, left);
6846 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6847 struct sctp_sndrcvinfo *srcv)
6850 struct sctp_copy_all *ca;
6852 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6859 memset(ca, 0, sizeof(struct sctp_copy_all));
6863 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6866 * take off the sendall flag, it would be bad if we failed to do
6869 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6870 /* get length and mbuf chain */
6872 ca->sndlen = uio->uio_resid;
6873 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6874 if (ca->m == NULL) {
6875 SCTP_FREE(ca, SCTP_M_COPYAL);
6876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6880 /* Gather the length of the send */
6884 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6885 ca->sndlen += SCTP_BUF_LEN(mat);
6888 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6889 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6890 SCTP_ASOC_ANY_STATE,
6892 sctp_sendall_completes, inp, 1);
6894 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6895 SCTP_FREE(ca, SCTP_M_COPYAL);
6896 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6904 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6906 struct sctp_tmit_chunk *chk, *nchk;
6908 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6909 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6910 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6912 sctp_m_freem(chk->data);
6915 asoc->ctrl_queue_cnt--;
6916 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6922 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6924 struct sctp_association *asoc;
6925 struct sctp_tmit_chunk *chk, *nchk;
6926 struct sctp_asconf_chunk *acp;
6929 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6930 /* find SCTP_ASCONF chunk in queue */
6931 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6933 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6934 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6939 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6941 sctp_m_freem(chk->data);
6944 asoc->ctrl_queue_cnt--;
6945 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6952 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6953 struct sctp_association *asoc,
6954 struct sctp_tmit_chunk **data_list,
6956 struct sctp_nets *net)
6959 struct sctp_tmit_chunk *tp1;
6961 for (i = 0; i < bundle_at; i++) {
6962 /* off of the send queue */
6963 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6964 asoc->send_queue_cnt--;
6967 * Any chunk NOT 0 you zap the time chunk 0 gets
6968 * zapped or set based on if a RTO measurment is
6971 data_list[i]->do_rtt = 0;
6974 data_list[i]->sent_rcv_time = net->last_sent_time;
6975 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6976 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6977 if (data_list[i]->whoTo == NULL) {
6978 data_list[i]->whoTo = net;
6979 atomic_add_int(&net->ref_count, 1);
6981 /* on to the sent queue */
6982 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6983 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6984 struct sctp_tmit_chunk *tpp;
6986 /* need to move back */
6988 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6990 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6994 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6997 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6999 TAILQ_INSERT_TAIL(&asoc->sent_queue,
7004 /* This does not lower until the cum-ack passes it */
7005 asoc->sent_queue_cnt++;
7006 if ((asoc->peers_rwnd <= 0) &&
7007 (asoc->total_flight == 0) &&
7009 /* Mark the chunk as being a window probe */
7010 SCTP_STAT_INCR(sctps_windowprobed);
7012 #ifdef SCTP_AUDITING_ENABLED
7013 sctp_audit_log(0xC2, 3);
7015 data_list[i]->sent = SCTP_DATAGRAM_SENT;
7016 data_list[i]->snd_count = 1;
7017 data_list[i]->rec.data.chunk_was_revoked = 0;
7018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
7019 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
7020 data_list[i]->whoTo->flight_size,
7021 data_list[i]->book_size,
7022 (uintptr_t) data_list[i]->whoTo,
7023 data_list[i]->rec.data.TSN_seq);
7025 sctp_flight_size_increase(data_list[i]);
7026 sctp_total_flight_increase(stcb, data_list[i]);
7027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
7028 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
7029 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
7031 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
7032 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
7033 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
7034 /* SWS sender side engages */
7035 asoc->peers_rwnd = 0;
7038 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
7039 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
7044 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
7045 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7050 struct sctp_tmit_chunk *chk, *nchk;
7052 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7053 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7054 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7055 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7056 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7057 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7058 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7059 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7060 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7061 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7062 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7063 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7064 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7065 /* Stray chunks must be cleaned up */
7067 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7069 sctp_m_freem(chk->data);
7072 asoc->ctrl_queue_cnt--;
7073 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7074 asoc->fwd_tsn_cnt--;
7075 sctp_free_a_chunk(stcb, chk, so_locked);
7076 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7077 /* special handling, we must look into the param */
7078 if (chk != asoc->str_reset) {
7079 goto clean_up_anyway;
7087 sctp_can_we_split_this(struct sctp_tcb *stcb,
7089 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7092 * Make a decision on if I should split a msg into multiple parts.
7093 * This is only asked of incomplete messages.
7097 * If we are doing EEOR we need to always send it if its the
7098 * entire thing, since it might be all the guy is putting in
7101 if (goal_mtu >= length) {
7103 * If we have data outstanding,
7104 * we get another chance when the sack
7105 * arrives to transmit - wait for more data
7107 if (stcb->asoc.total_flight == 0) {
7109 * If nothing is in flight, we zero the
7117 /* You can fill the rest */
7122 * For those strange folk that make the send buffer
7123 * smaller than our fragmentation point, we can't
7124 * get a full msg in so we have to allow splitting.
7126 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7129 if ((length <= goal_mtu) ||
7130 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7131 /* Sub-optimial residual don't split in non-eeor mode. */
7135 * If we reach here length is larger than the goal_mtu. Do we wish
7136 * to split it for the sake of packet putting together?
7138 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7139 /* Its ok to split it */
7140 return (min(goal_mtu, frag_point));
7142 /* Nope, can't split */
7148 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7149 struct sctp_stream_out *strq,
7151 uint32_t frag_point,
7157 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7162 /* Move from the stream to the send_queue keeping track of the total */
7163 struct sctp_association *asoc;
7164 struct sctp_stream_queue_pending *sp;
7165 struct sctp_tmit_chunk *chk;
7166 struct sctp_data_chunk *dchkh;
7167 uint32_t to_move, length;
7168 uint8_t rcv_flags = 0;
7170 uint8_t send_lock_up = 0;
7172 SCTP_TCB_LOCK_ASSERT(stcb);
7175 /* sa_ignore FREED_MEMORY */
7176 sp = TAILQ_FIRST(&strq->outqueue);
7179 if (send_lock_up == 0) {
7180 SCTP_TCB_SEND_LOCK(stcb);
7183 sp = TAILQ_FIRST(&strq->outqueue);
7187 if (strq->last_msg_incomplete) {
7188 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7190 strq->last_msg_incomplete);
7191 strq->last_msg_incomplete = 0;
7195 SCTP_TCB_SEND_UNLOCK(stcb);
7200 if ((sp->msg_is_complete) && (sp->length == 0)) {
7201 if (sp->sender_all_done) {
7203 * We are doing differed cleanup. Last time through
7204 * when we took all the data the sender_all_done was
7207 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7210 sp->sender_all_done,
7212 sp->msg_is_complete,
7216 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7217 SCTP_TCB_SEND_LOCK(stcb);
7220 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7221 TAILQ_REMOVE(&strq->outqueue, sp, next);
7222 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7223 (strq->chunks_on_queues == 0) &&
7224 TAILQ_EMPTY(&strq->outqueue)) {
7225 stcb->asoc.trigger_reset = 1;
7227 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7229 sctp_free_remote_addr(sp->net);
7233 sctp_m_freem(sp->data);
7236 sctp_free_a_strmoq(stcb, sp, so_locked);
7237 /* we can't be locked to it */
7239 stcb->asoc.locked_on_sending = NULL;
7241 SCTP_TCB_SEND_UNLOCK(stcb);
7244 /* back to get the next msg */
7248 * sender just finished this but still holds a
7257 /* is there some to get */
7258 if (sp->length == 0) {
7264 } else if (sp->discard_rest) {
7265 if (send_lock_up == 0) {
7266 SCTP_TCB_SEND_LOCK(stcb);
7269 /* Whack down the size */
7270 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7271 if ((stcb->sctp_socket != NULL) &&
7272 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7273 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7274 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7277 sctp_m_freem(sp->data);
7279 sp->tail_mbuf = NULL;
7289 some_taken = sp->some_taken;
7291 length = sp->length;
7292 if (sp->msg_is_complete) {
7293 /* The message is complete */
7294 to_move = min(length, frag_point);
7295 if (to_move == length) {
7296 /* All of it fits in the MTU */
7297 if (sp->some_taken) {
7298 rcv_flags |= SCTP_DATA_LAST_FRAG;
7299 sp->put_last_out = 1;
7301 rcv_flags |= SCTP_DATA_NOT_FRAG;
7302 sp->put_last_out = 1;
7305 /* Not all of it fits, we fragment */
7306 if (sp->some_taken == 0) {
7307 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7312 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7315 * We use a snapshot of length in case it
7316 * is expanding during the compare.
7321 if (to_move >= llen) {
7323 if (send_lock_up == 0) {
7325 * We are taking all of an incomplete msg
7326 * thus we need a send lock.
7328 SCTP_TCB_SEND_LOCK(stcb);
7330 if (sp->msg_is_complete) {
7332 * the sender finished the
7339 if (sp->some_taken == 0) {
7340 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7344 /* Nothing to take. */
7345 if (sp->some_taken) {
7354 /* If we reach here, we can copy out a chunk */
7355 sctp_alloc_a_chunk(stcb, chk);
7357 /* No chunk memory */
7363 * Setup for unordered if needed by looking at the user sent info
7366 if (sp->sinfo_flags & SCTP_UNORDERED) {
7367 rcv_flags |= SCTP_DATA_UNORDERED;
7369 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7370 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7371 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7373 /* clear out the chunk before setting up */
7374 memset(chk, 0, sizeof(*chk));
7375 chk->rec.data.rcv_flags = rcv_flags;
7377 if (to_move >= length) {
7378 /* we think we can steal the whole thing */
7379 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7380 SCTP_TCB_SEND_LOCK(stcb);
7383 if (to_move < sp->length) {
7384 /* bail, it changed */
7387 chk->data = sp->data;
7388 chk->last_mbuf = sp->tail_mbuf;
7389 /* register the stealing */
7390 sp->data = sp->tail_mbuf = NULL;
7395 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7396 chk->last_mbuf = NULL;
7397 if (chk->data == NULL) {
7398 sp->some_taken = some_taken;
7399 sctp_free_a_chunk(stcb, chk, so_locked);
7404 #ifdef SCTP_MBUF_LOGGING
7405 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7406 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7409 /* Pull off the data */
7410 m_adj(sp->data, to_move);
7411 /* Now lets work our way down and compact it */
7413 while (m && (SCTP_BUF_LEN(m) == 0)) {
7414 sp->data = SCTP_BUF_NEXT(m);
7415 SCTP_BUF_NEXT(m) = NULL;
7416 if (sp->tail_mbuf == m) {
7418 * Freeing tail? TSNH since
7419 * we supposedly were taking less
7420 * than the sp->length.
7423 panic("Huh, freing tail? - TSNH");
7425 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7426 sp->tail_mbuf = sp->data = NULL;
7435 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7436 chk->copy_by_ref = 1;
7438 chk->copy_by_ref = 0;
7441 * get last_mbuf and counts of mb useage This is ugly but hopefully
7442 * its only one mbuf.
7444 if (chk->last_mbuf == NULL) {
7445 chk->last_mbuf = chk->data;
7446 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7447 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7450 if (to_move > length) {
7451 /*- This should not happen either
7452 * since we always lower to_move to the size
7453 * of sp->length if its larger.
7456 panic("Huh, how can to_move be larger?");
7458 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7462 atomic_subtract_int(&sp->length, to_move);
7464 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7465 /* Not enough room for a chunk header, get some */
7468 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7471 * we're in trouble here. _PREPEND below will free
7472 * all the data if there is no leading space, so we
7473 * must put the data back and restore.
7475 if (send_lock_up == 0) {
7476 SCTP_TCB_SEND_LOCK(stcb);
7479 if (sp->data == NULL) {
7480 /* unsteal the data */
7481 sp->data = chk->data;
7482 sp->tail_mbuf = chk->last_mbuf;
7486 /* reassemble the data */
7488 sp->data = chk->data;
7489 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7491 sp->some_taken = some_taken;
7492 atomic_add_int(&sp->length, to_move);
7495 sctp_free_a_chunk(stcb, chk, so_locked);
7499 SCTP_BUF_LEN(m) = 0;
7500 SCTP_BUF_NEXT(m) = chk->data;
7502 M_ALIGN(chk->data, 4);
7505 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7506 if (chk->data == NULL) {
7507 /* HELP, TSNH since we assured it would not above? */
7509 panic("prepend failes HELP?");
7511 SCTP_PRINTF("prepend fails HELP?\n");
7512 sctp_free_a_chunk(stcb, chk, so_locked);
7518 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7519 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7520 chk->book_size_scale = 0;
7521 chk->sent = SCTP_DATAGRAM_UNSENT;
7524 chk->asoc = &stcb->asoc;
7525 chk->pad_inplace = 0;
7526 chk->no_fr_allowed = 0;
7527 chk->rec.data.stream_seq = strq->next_sequence_send;
7528 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7529 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7530 strq->next_sequence_send++;
7532 chk->rec.data.stream_number = sp->stream;
7533 chk->rec.data.payloadtype = sp->ppid;
7534 chk->rec.data.context = sp->context;
7535 chk->rec.data.doing_fast_retransmit = 0;
7537 chk->rec.data.timetodrop = sp->ts;
7538 chk->flags = sp->act_flags;
7541 chk->whoTo = sp->net;
7542 atomic_add_int(&chk->whoTo->ref_count, 1);
7546 if (sp->holds_key_ref) {
7547 chk->auth_keyid = sp->auth_keyid;
7548 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7549 chk->holds_key_ref = 1;
7551 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7552 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7553 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7554 (uintptr_t) stcb, sp->length,
7555 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7556 chk->rec.data.TSN_seq);
7558 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7560 * Put the rest of the things in place now. Size was done earlier in
7561 * previous loop prior to padding.
7564 #ifdef SCTP_ASOCLOG_OF_TSNS
7565 SCTP_TCB_LOCK_ASSERT(stcb);
7566 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7567 asoc->tsn_out_at = 0;
7568 asoc->tsn_out_wrapped = 1;
7570 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7571 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7572 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7573 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7574 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7575 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7576 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7577 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7581 dchkh->ch.chunk_type = SCTP_DATA;
7582 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7583 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7584 dchkh->dp.stream_id = htons(strq->stream_no);
7585 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7586 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7587 dchkh->ch.chunk_length = htons(chk->send_size);
7588 /* Now advance the chk->send_size by the actual pad needed. */
7589 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7594 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7595 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7597 chk->last_mbuf = lm;
7598 chk->pad_inplace = 1;
7600 chk->send_size += pads;
7602 if (PR_SCTP_ENABLED(chk->flags)) {
7603 asoc->pr_sctp_cnt++;
7605 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7606 /* All done pull and kill the message */
7607 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7608 if (sp->put_last_out == 0) {
7609 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7610 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7611 sp->sender_all_done,
7613 sp->msg_is_complete,
7617 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7618 SCTP_TCB_SEND_LOCK(stcb);
7621 TAILQ_REMOVE(&strq->outqueue, sp, next);
7622 if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
7623 (strq->chunks_on_queues == 0) &&
7624 TAILQ_EMPTY(&strq->outqueue)) {
7625 stcb->asoc.trigger_reset = 1;
7627 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7629 sctp_free_remote_addr(sp->net);
7633 sctp_m_freem(sp->data);
7636 sctp_free_a_strmoq(stcb, sp, so_locked);
7638 /* we can't be locked to it */
7640 stcb->asoc.locked_on_sending = NULL;
7642 /* more to go, we are locked */
7645 asoc->chunks_on_out_queue++;
7646 strq->chunks_on_queues++;
7647 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7648 asoc->send_queue_cnt++;
7651 SCTP_TCB_SEND_UNLOCK(stcb);
7658 sctp_fill_outqueue(struct sctp_tcb *stcb,
7659 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7660 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7665 struct sctp_association *asoc;
7666 struct sctp_stream_out *strq;
7667 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7670 SCTP_TCB_LOCK_ASSERT(stcb);
7672 switch (net->ro._l_addr.sa.sa_family) {
7675 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7680 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7685 goal_mtu = net->mtu;
7688 /* Need an allowance for the data chunk header too */
7689 goal_mtu -= sizeof(struct sctp_data_chunk);
7691 /* must make even word boundary */
7692 goal_mtu &= 0xfffffffc;
7693 if (asoc->locked_on_sending) {
7694 /* We are stuck on one stream until the message completes. */
7695 strq = asoc->locked_on_sending;
7698 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7701 while ((goal_mtu > 0) && strq) {
7704 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7705 &giveup, eeor_mode, &bail, so_locked);
7707 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7710 asoc->locked_on_sending = strq;
7711 if ((moved_how_much == 0) || (giveup) || bail)
7712 /* no more to move for now */
7715 asoc->locked_on_sending = NULL;
7716 if ((giveup) || bail) {
7719 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7724 total_moved += moved_how_much;
7725 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7726 goal_mtu &= 0xfffffffc;
7731 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7733 if (total_moved == 0) {
7734 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7735 (net == stcb->asoc.primary_destination)) {
7736 /* ran dry for primary network net */
7737 SCTP_STAT_INCR(sctps_primary_randry);
7738 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7739 /* ran dry with CMT on */
7740 SCTP_STAT_INCR(sctps_cmt_randry);
7746 sctp_fix_ecn_echo(struct sctp_association *asoc)
7748 struct sctp_tmit_chunk *chk;
7750 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7751 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7752 chk->sent = SCTP_DATAGRAM_UNSENT;
7758 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7760 struct sctp_association *asoc;
7761 struct sctp_tmit_chunk *chk;
7762 struct sctp_stream_queue_pending *sp;
7769 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7770 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7771 if (sp->net == net) {
7772 sctp_free_remote_addr(sp->net);
7777 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7778 if (chk->whoTo == net) {
7779 sctp_free_remote_addr(chk->whoTo);
7786 sctp_med_chunk_output(struct sctp_inpcb *inp,
7787 struct sctp_tcb *stcb,
7788 struct sctp_association *asoc,
7791 int control_only, int from_where,
7792 struct timeval *now, int *now_filled, int frag_point, int so_locked
7793 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7799 * Ok this is the generic chunk service queue. we must do the
7800 * following: - Service the stream queue that is next, moving any
7801 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7802 * LAST to the out queue in one pass) and assigning TSN's - Check to
7803 * see if the cwnd/rwnd allows any output, if so we go ahead and
7804 * fomulate and send the low level chunks. Making sure to combine
7805 * any control in the control chunk queue also.
7807 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7808 struct mbuf *outchain, *endoutchain;
7809 struct sctp_tmit_chunk *chk, *nchk;
7811 /* temp arrays for unlinking */
7812 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7813 int no_fragmentflg, error;
7814 unsigned int max_rwnd_per_dest, max_send_per_dest;
7815 int one_chunk, hbflag, skip_data_for_this_net;
7816 int asconf, cookie, no_out_cnt;
7817 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7818 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7820 uint32_t auth_offset = 0;
7821 struct sctp_auth_chunk *auth = NULL;
7822 uint16_t auth_keyid;
7823 int override_ok = 1;
7824 int skip_fill_up = 0;
7825 int data_auth_reqd = 0;
7828 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7835 auth_keyid = stcb->asoc.authinfo.active_keyid;
7836 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7837 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7838 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7843 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7845 * First lets prime the pump. For each destination, if there is room
7846 * in the flight size, attempt to pull an MTU's worth out of the
7847 * stream queues into the general send_queue
7849 #ifdef SCTP_AUDITING_ENABLED
7850 sctp_audit_log(0xC2, 2);
7852 SCTP_TCB_LOCK_ASSERT(stcb);
7859 /* Nothing to possible to send? */
7860 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7861 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7862 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7863 TAILQ_EMPTY(&asoc->send_queue) &&
7864 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7869 if (asoc->peers_rwnd == 0) {
7870 /* No room in peers rwnd */
7872 if (asoc->total_flight > 0) {
7873 /* we are allowed one chunk in flight */
7877 if (stcb->asoc.ecn_echo_cnt_onq) {
7878 /* Record where a sack goes, if any */
7879 if (no_data_chunks &&
7880 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7881 /* Nothing but ECNe to send - we don't do that */
7882 goto nothing_to_send;
7884 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7885 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7886 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7887 sack_goes_to = chk->whoTo;
7892 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7893 if (stcb->sctp_socket)
7894 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7896 max_send_per_dest = 0;
7897 if (no_data_chunks == 0) {
7898 /* How many non-directed chunks are there? */
7899 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7900 if (chk->whoTo == NULL) {
7902 * We already have non-directed chunks on
7903 * the queue, no need to do a fill-up.
7911 if ((no_data_chunks == 0) &&
7912 (skip_fill_up == 0) &&
7913 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7914 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7916 * This for loop we are in takes in each net, if
7917 * its's got space in cwnd and has data sent to it
7918 * (when CMT is off) then it calls
7919 * sctp_fill_outqueue for the net. This gets data on
7920 * the send queue for that network.
7922 * In sctp_fill_outqueue TSN's are assigned and data is
7923 * copied out of the stream buffers. Note mostly
7924 * copy by reference (we hope).
7926 net->window_probe = 0;
7927 if ((net != stcb->asoc.alternate) &&
7928 ((net->dest_state & SCTP_ADDR_PF) ||
7929 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7930 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7931 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7932 sctp_log_cwnd(stcb, net, 1,
7933 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7937 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7938 (net->flight_size == 0)) {
7939 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7941 if (net->flight_size >= net->cwnd) {
7942 /* skip this network, no room - can't fill */
7943 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7944 sctp_log_cwnd(stcb, net, 3,
7945 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7949 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7950 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7952 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7954 /* memory alloc failure */
7960 /* now service each destination and send out what we can for it */
7961 /* Nothing to send? */
7962 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7963 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7964 TAILQ_EMPTY(&asoc->send_queue)) {
7968 if (asoc->sctp_cmt_on_off > 0) {
7969 /* get the last start point */
7970 start_at = asoc->last_net_cmt_send_started;
7971 if (start_at == NULL) {
7972 /* null so to beginning */
7973 start_at = TAILQ_FIRST(&asoc->nets);
7975 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7976 if (start_at == NULL) {
7977 start_at = TAILQ_FIRST(&asoc->nets);
7980 asoc->last_net_cmt_send_started = start_at;
7982 start_at = TAILQ_FIRST(&asoc->nets);
7984 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7985 if (chk->whoTo == NULL) {
7986 if (asoc->alternate) {
7987 chk->whoTo = asoc->alternate;
7989 chk->whoTo = asoc->primary_destination;
7991 atomic_add_int(&chk->whoTo->ref_count, 1);
7994 old_start_at = NULL;
7995 again_one_more_time:
7996 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7997 /* how much can we send? */
7998 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7999 if (old_start_at && (old_start_at == net)) {
8000 /* through list ocmpletely. */
8004 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
8005 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
8006 (net->flight_size >= net->cwnd)) {
8008 * Nothing on control or asconf and flight is full,
8009 * we can skip even in the CMT case.
8014 endoutchain = outchain = NULL;
8017 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
8018 skip_data_for_this_net = 1;
8020 skip_data_for_this_net = 0;
8022 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8025 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8030 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8040 if (mtu > asoc->peers_rwnd) {
8041 if (asoc->total_flight > 0) {
8042 /* We have a packet in flight somewhere */
8043 r_mtu = asoc->peers_rwnd;
8045 /* We are always allowed to send one MTU out */
8053 /************************/
8054 /* ASCONF transmission */
8055 /************************/
8056 /* Now first lets go through the asconf queue */
8057 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8058 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8061 if (chk->whoTo == NULL) {
8062 if (asoc->alternate == NULL) {
8063 if (asoc->primary_destination != net) {
8067 if (asoc->alternate != net) {
8072 if (chk->whoTo != net) {
8076 if (chk->data == NULL) {
8079 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8080 chk->sent != SCTP_DATAGRAM_RESEND) {
8084 * if no AUTH is yet included and this chunk
8085 * requires it, make sure to account for it. We
8086 * don't apply the size until the AUTH chunk is
8087 * actually added below in case there is no room for
8088 * this chunk. NOTE: we overload the use of "omtu"
8091 if ((auth == NULL) &&
8092 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8093 stcb->asoc.peer_auth_chunks)) {
8094 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8097 /* Here we do NOT factor the r_mtu */
8098 if ((chk->send_size < (int)(mtu - omtu)) ||
8099 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8101 * We probably should glom the mbuf chain
8102 * from the chk->data for control but the
8103 * problem is it becomes yet one more level
8104 * of tracking to do if for some reason
8105 * output fails. Then I have got to
8106 * reconstruct the merged control chain.. el
8107 * yucko.. for now we take the easy way and
8111 * Add an AUTH chunk, if chunk requires it
8112 * save the offset into the chain for AUTH
8114 if ((auth == NULL) &&
8115 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8116 stcb->asoc.peer_auth_chunks))) {
8117 outchain = sctp_add_auth_chunk(outchain,
8122 chk->rec.chunk_id.id);
8123 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8125 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8126 (int)chk->rec.chunk_id.can_take_data,
8127 chk->send_size, chk->copy_by_ref);
8128 if (outchain == NULL) {
8130 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8133 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8134 /* update our MTU size */
8135 if (mtu > (chk->send_size + omtu))
8136 mtu -= (chk->send_size + omtu);
8139 to_out += (chk->send_size + omtu);
8140 /* Do clear IP_DF ? */
8141 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8144 if (chk->rec.chunk_id.can_take_data)
8147 * set hb flag since we can use these for
8153 * should sysctl this: don't bundle data
8154 * with ASCONF since it requires AUTH
8157 chk->sent = SCTP_DATAGRAM_SENT;
8158 if (chk->whoTo == NULL) {
8160 atomic_add_int(&net->ref_count, 1);
8165 * Ok we are out of room but we can
8166 * output without effecting the
8167 * flight size since this little guy
8168 * is a control only packet.
8170 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8172 * do NOT clear the asconf flag as
8173 * it is used to do appropriate
8174 * source address selection.
8176 if (*now_filled == 0) {
8177 (void)SCTP_GETTIME_TIMEVAL(now);
8180 net->last_sent_time = *now;
8182 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8183 (struct sockaddr *)&net->ro._l_addr,
8184 outchain, auth_offset, auth,
8185 stcb->asoc.authinfo.active_keyid,
8186 no_fragmentflg, 0, asconf,
8187 inp->sctp_lport, stcb->rport,
8188 htonl(stcb->asoc.peer_vtag),
8193 * error, we could not
8196 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8197 if (from_where == 0) {
8198 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8200 if (error == ENOBUFS) {
8201 asoc->ifp_had_enobuf = 1;
8202 SCTP_STAT_INCR(sctps_lowlevelerr);
8204 /* error, could not output */
8205 if (error == EHOSTUNREACH) {
8211 sctp_move_chunks_from_net(stcb, net);
8216 asoc->ifp_had_enobuf = 0;
8219 * increase the number we sent, if a
8220 * cookie is sent we don't tell them
8223 outchain = endoutchain = NULL;
8227 *num_out += ctl_cnt;
8228 /* recalc a clean slate and setup */
8229 switch (net->ro._l_addr.sa.sa_family) {
8232 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8237 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8254 /************************/
8255 /* Control transmission */
8256 /************************/
8257 /* Now first lets go through the control queue */
8258 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8259 if ((sack_goes_to) &&
8260 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8261 (chk->whoTo != sack_goes_to)) {
8263 * if we have a sack in queue, and we are
8264 * looking at an ecn echo that is NOT queued
8265 * to where the sack is going..
8267 if (chk->whoTo == net) {
8269 * Don't transmit it to where its
8270 * going (current net)
8273 } else if (sack_goes_to == net) {
8275 * But do transmit it to this
8278 goto skip_net_check;
8281 if (chk->whoTo == NULL) {
8282 if (asoc->alternate == NULL) {
8283 if (asoc->primary_destination != net) {
8287 if (asoc->alternate != net) {
8292 if (chk->whoTo != net) {
8297 if (chk->data == NULL) {
8300 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8302 * It must be unsent. Cookies and ASCONF's
8303 * hang around but there timers will force
8304 * when marked for resend.
8309 * if no AUTH is yet included and this chunk
8310 * requires it, make sure to account for it. We
8311 * don't apply the size until the AUTH chunk is
8312 * actually added below in case there is no room for
8313 * this chunk. NOTE: we overload the use of "omtu"
8316 if ((auth == NULL) &&
8317 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8318 stcb->asoc.peer_auth_chunks)) {
8319 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8322 /* Here we do NOT factor the r_mtu */
8323 if ((chk->send_size <= (int)(mtu - omtu)) ||
8324 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8326 * We probably should glom the mbuf chain
8327 * from the chk->data for control but the
8328 * problem is it becomes yet one more level
8329 * of tracking to do if for some reason
8330 * output fails. Then I have got to
8331 * reconstruct the merged control chain.. el
8332 * yucko.. for now we take the easy way and
8336 * Add an AUTH chunk, if chunk requires it
8337 * save the offset into the chain for AUTH
8339 if ((auth == NULL) &&
8340 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8341 stcb->asoc.peer_auth_chunks))) {
8342 outchain = sctp_add_auth_chunk(outchain,
8347 chk->rec.chunk_id.id);
8348 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8350 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8351 (int)chk->rec.chunk_id.can_take_data,
8352 chk->send_size, chk->copy_by_ref);
8353 if (outchain == NULL) {
8355 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8358 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8359 /* update our MTU size */
8360 if (mtu > (chk->send_size + omtu))
8361 mtu -= (chk->send_size + omtu);
8364 to_out += (chk->send_size + omtu);
8365 /* Do clear IP_DF ? */
8366 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8369 if (chk->rec.chunk_id.can_take_data)
8371 /* Mark things to be removed, if needed */
8372 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8373 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8374 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8375 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8376 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8377 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8378 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8379 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8380 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8381 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8382 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8383 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8386 /* remove these chunks at the end */
8387 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8388 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8389 /* turn off the timer */
8390 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8391 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8393 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8399 * Other chunks, since they have
8400 * timers running (i.e. COOKIE) we
8401 * just "trust" that it gets sent or
8405 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8408 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8410 * Increment ecne send count
8411 * here this means we may be
8412 * over-zealous in our
8413 * counting if the send
8414 * fails, but its the best
8415 * place to do it (we used
8416 * to do it in the queue of
8417 * the chunk, but that did
8418 * not tell how many times
8421 SCTP_STAT_INCR(sctps_sendecne);
8423 chk->sent = SCTP_DATAGRAM_SENT;
8424 if (chk->whoTo == NULL) {
8426 atomic_add_int(&net->ref_count, 1);
8432 * Ok we are out of room but we can
8433 * output without effecting the
8434 * flight size since this little guy
8435 * is a control only packet.
8438 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8440 * do NOT clear the asconf
8441 * flag as it is used to do
8442 * appropriate source
8443 * address selection.
8447 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8450 /* Only HB or ASCONF advances time */
8452 if (*now_filled == 0) {
8453 (void)SCTP_GETTIME_TIMEVAL(now);
8456 net->last_sent_time = *now;
8459 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8460 (struct sockaddr *)&net->ro._l_addr,
8463 stcb->asoc.authinfo.active_keyid,
8464 no_fragmentflg, 0, asconf,
8465 inp->sctp_lport, stcb->rport,
8466 htonl(stcb->asoc.peer_vtag),
8471 * error, we could not
8474 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8475 if (from_where == 0) {
8476 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8478 if (error == ENOBUFS) {
8479 asoc->ifp_had_enobuf = 1;
8480 SCTP_STAT_INCR(sctps_lowlevelerr);
8482 if (error == EHOSTUNREACH) {
8488 sctp_move_chunks_from_net(stcb, net);
8493 asoc->ifp_had_enobuf = 0;
8496 * increase the number we sent, if a
8497 * cookie is sent we don't tell them
8500 outchain = endoutchain = NULL;
8504 *num_out += ctl_cnt;
8505 /* recalc a clean slate and setup */
8506 switch (net->ro._l_addr.sa.sa_family) {
8509 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8514 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8531 /* JRI: if dest is in PF state, do not send data to it */
8532 if ((asoc->sctp_cmt_on_off > 0) &&
8533 (net != stcb->asoc.alternate) &&
8534 (net->dest_state & SCTP_ADDR_PF)) {
8537 if (net->flight_size >= net->cwnd) {
8540 if ((asoc->sctp_cmt_on_off > 0) &&
8541 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8542 (net->flight_size > max_rwnd_per_dest)) {
8546 * We need a specific accounting for the usage of the send
8547 * buffer. We also need to check the number of messages per
8548 * net. For now, this is better than nothing and it disabled
8551 if ((asoc->sctp_cmt_on_off > 0) &&
8552 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8553 (max_send_per_dest > 0) &&
8554 (net->flight_size > max_send_per_dest)) {
8557 /*********************/
8558 /* Data transmission */
8559 /*********************/
8561 * if AUTH for DATA is required and no AUTH has been added
8562 * yet, account for this in the mtu now... if no data can be
8563 * bundled, this adjustment won't matter anyways since the
8564 * packet will be going out...
8566 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8567 stcb->asoc.peer_auth_chunks);
8568 if (data_auth_reqd && (auth == NULL)) {
8569 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8571 /* now lets add any data within the MTU constraints */
8572 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8575 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8576 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8583 if (net->mtu > SCTP_MIN_OVERHEAD)
8584 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8594 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8595 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8596 (skip_data_for_this_net == 0)) ||
8598 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8599 if (no_data_chunks) {
8600 /* let only control go out */
8604 if (net->flight_size >= net->cwnd) {
8605 /* skip this net, no room for data */
8609 if ((chk->whoTo != NULL) &&
8610 (chk->whoTo != net)) {
8611 /* Don't send the chunk on this net */
8614 if (asoc->sctp_cmt_on_off == 0) {
8615 if ((asoc->alternate) &&
8616 (asoc->alternate != net) &&
8617 (chk->whoTo == NULL)) {
8619 } else if ((net != asoc->primary_destination) &&
8620 (asoc->alternate == NULL) &&
8621 (chk->whoTo == NULL)) {
8625 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8627 * strange, we have a chunk that is
8628 * to big for its destination and
8629 * yet no fragment ok flag.
8630 * Something went wrong when the
8631 * PMTU changed...we did not mark
8632 * this chunk for some reason?? I
8633 * will fix it here by letting IP
8634 * fragment it for now and printing
8635 * a warning. This really should not
8638 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8639 chk->send_size, mtu);
8640 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8642 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8643 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8644 struct sctp_data_chunk *dchkh;
8646 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8647 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8649 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8650 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8651 /* ok we will add this one */
8654 * Add an AUTH chunk, if chunk
8655 * requires it, save the offset into
8656 * the chain for AUTH
8658 if (data_auth_reqd) {
8660 outchain = sctp_add_auth_chunk(outchain,
8666 auth_keyid = chk->auth_keyid;
8668 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8669 } else if (override_ok) {
8674 auth_keyid = chk->auth_keyid;
8676 } else if (auth_keyid != chk->auth_keyid) {
8684 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8685 chk->send_size, chk->copy_by_ref);
8686 if (outchain == NULL) {
8687 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8688 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8689 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8692 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8695 /* upate our MTU size */
8696 /* Do clear IP_DF ? */
8697 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8700 /* unsigned subtraction of mtu */
8701 if (mtu > chk->send_size)
8702 mtu -= chk->send_size;
8705 /* unsigned subtraction of r_mtu */
8706 if (r_mtu > chk->send_size)
8707 r_mtu -= chk->send_size;
8711 to_out += chk->send_size;
8712 if ((to_out > mx_mtu) && no_fragmentflg) {
8714 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8716 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8720 chk->window_probe = 0;
8721 data_list[bundle_at++] = chk;
8722 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8725 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8726 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8727 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8729 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8731 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8732 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8742 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8744 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8745 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8746 data_list[0]->window_probe = 1;
8747 net->window_probe = 1;
8753 * Must be sent in order of the
8754 * TSN's (on a network)
8758 } /* for (chunk gather loop for this net) */
8759 } /* if asoc.state OPEN */
8761 /* Is there something to send for this destination? */
8763 /* We may need to start a control timer or two */
8765 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8768 * do NOT clear the asconf flag as it is
8769 * used to do appropriate source address
8774 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8777 /* must start a send timer if data is being sent */
8778 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8780 * no timer running on this destination
8783 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8785 if (bundle_at || hbflag) {
8786 /* For data/asconf and hb set time */
8787 if (*now_filled == 0) {
8788 (void)SCTP_GETTIME_TIMEVAL(now);
8791 net->last_sent_time = *now;
8793 /* Now send it, if there is anything to send :> */
8794 if ((error = sctp_lowlevel_chunk_output(inp,
8797 (struct sockaddr *)&net->ro._l_addr,
8805 inp->sctp_lport, stcb->rport,
8806 htonl(stcb->asoc.peer_vtag),
8810 /* error, we could not output */
8811 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8812 if (from_where == 0) {
8813 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8815 if (error == ENOBUFS) {
8816 SCTP_STAT_INCR(sctps_lowlevelerr);
8817 asoc->ifp_had_enobuf = 1;
8819 if (error == EHOSTUNREACH) {
8821 * Destination went unreachable
8824 sctp_move_chunks_from_net(stcb, net);
8828 * I add this line to be paranoid. As far as
8829 * I can tell the continue, takes us back to
8830 * the top of the for, but just to make sure
8831 * I will reset these again here.
8833 ctl_cnt = bundle_at = 0;
8834 continue; /* This takes us back to the
8835 * for() for the nets. */
8837 asoc->ifp_had_enobuf = 0;
8843 *num_out += (ctl_cnt + bundle_at);
8846 /* setup for a RTO measurement */
8847 tsns_sent = data_list[0]->rec.data.TSN_seq;
8848 /* fill time if not already filled */
8849 if (*now_filled == 0) {
8850 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8852 *now = asoc->time_last_sent;
8854 asoc->time_last_sent = *now;
8856 if (net->rto_needed) {
8857 data_list[0]->do_rtt = 1;
8858 net->rto_needed = 0;
8860 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8861 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8867 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8868 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8871 if (old_start_at == NULL) {
8872 old_start_at = start_at;
8873 start_at = TAILQ_FIRST(&asoc->nets);
8875 goto again_one_more_time;
8878 * At the end there should be no NON timed chunks hanging on this
8881 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8882 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8884 if ((*num_out == 0) && (*reason_code == 0)) {
8889 sctp_clean_up_ctl(stcb, asoc, so_locked);
8894 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8897 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8898 * the control chunk queue.
8900 struct sctp_chunkhdr *hdr;
8901 struct sctp_tmit_chunk *chk;
8902 struct mbuf *mat, *last_mbuf;
8903 uint32_t chunk_length;
8904 uint16_t padding_length;
8906 SCTP_TCB_LOCK_ASSERT(stcb);
8907 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8908 if (op_err == NULL) {
8913 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8914 chunk_length += SCTP_BUF_LEN(mat);
8915 if (SCTP_BUF_NEXT(mat) == NULL) {
8919 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
8920 sctp_m_freem(op_err);
8923 padding_length = chunk_length % 4;
8924 if (padding_length != 0) {
8925 padding_length = 4 - padding_length;
8927 if (padding_length != 0) {
8928 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
8929 sctp_m_freem(op_err);
8933 sctp_alloc_a_chunk(stcb, chk);
8936 sctp_m_freem(op_err);
8939 chk->copy_by_ref = 0;
8940 chk->send_size = (uint16_t) chunk_length;
8941 chk->sent = SCTP_DATAGRAM_UNSENT;
8943 chk->asoc = &stcb->asoc;
8946 hdr = mtod(op_err, struct sctp_chunkhdr *);
8947 hdr->chunk_type = SCTP_OPERATION_ERROR;
8948 hdr->chunk_flags = 0;
8949 hdr->chunk_length = htons(chk->send_size);
8950 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
8951 chk->asoc->ctrl_queue_cnt++;
8955 sctp_send_cookie_echo(struct mbuf *m,
8957 struct sctp_tcb *stcb,
8958 struct sctp_nets *net)
8961 * pull out the cookie and put it at the front of the control chunk
8965 struct mbuf *cookie;
8966 struct sctp_paramhdr parm, *phdr;
8967 struct sctp_chunkhdr *hdr;
8968 struct sctp_tmit_chunk *chk;
8969 uint16_t ptype, plen;
8971 SCTP_TCB_LOCK_ASSERT(stcb);
8972 /* First find the cookie in the param area */
8974 at = offset + sizeof(struct sctp_init_chunk);
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) {
8996 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
9001 at += SCTP_SIZE32(plen);
9003 /* ok, we got the cookie lets change it into a cookie echo chunk */
9004 /* first the change from param to cookie */
9005 hdr = mtod(cookie, struct sctp_chunkhdr *);
9006 hdr->chunk_type = SCTP_COOKIE_ECHO;
9007 hdr->chunk_flags = 0;
9008 /* get the chunk stuff now and place it in the FRONT of the queue */
9009 sctp_alloc_a_chunk(stcb, chk);
9012 sctp_m_freem(cookie);
9015 chk->copy_by_ref = 0;
9016 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
9017 chk->rec.chunk_id.can_take_data = 0;
9018 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9019 chk->send_size = plen;
9020 chk->sent = SCTP_DATAGRAM_UNSENT;
9022 chk->asoc = &stcb->asoc;
9025 atomic_add_int(&chk->whoTo->ref_count, 1);
9026 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
9027 chk->asoc->ctrl_queue_cnt++;
9032 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9036 struct sctp_nets *net)
9039 * take a HB request and make it into a HB ack and send it.
9041 struct mbuf *outchain;
9042 struct sctp_chunkhdr *chdr;
9043 struct sctp_tmit_chunk *chk;
9047 /* must have a net pointer */
9050 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
9051 if (outchain == NULL) {
9052 /* gak out of memory */
9055 #ifdef SCTP_MBUF_LOGGING
9056 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9057 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
9060 chdr = mtod(outchain, struct sctp_chunkhdr *);
9061 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9062 chdr->chunk_flags = 0;
9063 if (chk_length % 4) {
9065 uint32_t cpthis = 0;
9068 padlen = 4 - (chk_length % 4);
9069 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9071 sctp_alloc_a_chunk(stcb, chk);
9074 sctp_m_freem(outchain);
9077 chk->copy_by_ref = 0;
9078 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9079 chk->rec.chunk_id.can_take_data = 1;
9081 chk->send_size = chk_length;
9082 chk->sent = SCTP_DATAGRAM_UNSENT;
9084 chk->asoc = &stcb->asoc;
9085 chk->data = outchain;
9087 atomic_add_int(&chk->whoTo->ref_count, 1);
9088 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9089 chk->asoc->ctrl_queue_cnt++;
9093 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9095 /* formulate and queue a cookie-ack back to sender */
9096 struct mbuf *cookie_ack;
9097 struct sctp_chunkhdr *hdr;
9098 struct sctp_tmit_chunk *chk;
9100 SCTP_TCB_LOCK_ASSERT(stcb);
9102 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9103 if (cookie_ack == NULL) {
9107 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9108 sctp_alloc_a_chunk(stcb, chk);
9111 sctp_m_freem(cookie_ack);
9114 chk->copy_by_ref = 0;
9115 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9116 chk->rec.chunk_id.can_take_data = 1;
9118 chk->send_size = sizeof(struct sctp_chunkhdr);
9119 chk->sent = SCTP_DATAGRAM_UNSENT;
9121 chk->asoc = &stcb->asoc;
9122 chk->data = cookie_ack;
9123 if (chk->asoc->last_control_chunk_from != NULL) {
9124 chk->whoTo = chk->asoc->last_control_chunk_from;
9125 atomic_add_int(&chk->whoTo->ref_count, 1);
9129 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9130 hdr->chunk_type = SCTP_COOKIE_ACK;
9131 hdr->chunk_flags = 0;
9132 hdr->chunk_length = htons(chk->send_size);
9133 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9134 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9135 chk->asoc->ctrl_queue_cnt++;
9141 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9143 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9144 struct mbuf *m_shutdown_ack;
9145 struct sctp_shutdown_ack_chunk *ack_cp;
9146 struct sctp_tmit_chunk *chk;
9148 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9149 if (m_shutdown_ack == NULL) {
9153 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9154 sctp_alloc_a_chunk(stcb, chk);
9157 sctp_m_freem(m_shutdown_ack);
9160 chk->copy_by_ref = 0;
9161 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9162 chk->rec.chunk_id.can_take_data = 1;
9164 chk->send_size = sizeof(struct sctp_chunkhdr);
9165 chk->sent = SCTP_DATAGRAM_UNSENT;
9168 chk->asoc = &stcb->asoc;
9169 chk->data = m_shutdown_ack;
9172 atomic_add_int(&chk->whoTo->ref_count, 1);
9174 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9175 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9176 ack_cp->ch.chunk_flags = 0;
9177 ack_cp->ch.chunk_length = htons(chk->send_size);
9178 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9179 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9180 chk->asoc->ctrl_queue_cnt++;
9185 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9187 /* formulate and queue a SHUTDOWN to the sender */
9188 struct mbuf *m_shutdown;
9189 struct sctp_shutdown_chunk *shutdown_cp;
9190 struct sctp_tmit_chunk *chk;
9192 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9193 if (m_shutdown == NULL) {
9197 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9198 sctp_alloc_a_chunk(stcb, chk);
9201 sctp_m_freem(m_shutdown);
9204 chk->copy_by_ref = 0;
9205 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9206 chk->rec.chunk_id.can_take_data = 1;
9208 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9209 chk->sent = SCTP_DATAGRAM_UNSENT;
9212 chk->asoc = &stcb->asoc;
9213 chk->data = m_shutdown;
9216 atomic_add_int(&chk->whoTo->ref_count, 1);
9218 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9219 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9220 shutdown_cp->ch.chunk_flags = 0;
9221 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9222 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9223 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9224 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9225 chk->asoc->ctrl_queue_cnt++;
9230 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9233 * formulate and queue an ASCONF to the peer. ASCONF parameters
9234 * should be queued on the assoc queue.
9236 struct sctp_tmit_chunk *chk;
9237 struct mbuf *m_asconf;
9240 SCTP_TCB_LOCK_ASSERT(stcb);
9242 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9243 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9244 /* can't send a new one if there is one in flight already */
9247 /* compose an ASCONF chunk, maximum length is PMTU */
9248 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9249 if (m_asconf == NULL) {
9252 sctp_alloc_a_chunk(stcb, chk);
9255 sctp_m_freem(m_asconf);
9258 chk->copy_by_ref = 0;
9259 chk->rec.chunk_id.id = SCTP_ASCONF;
9260 chk->rec.chunk_id.can_take_data = 0;
9261 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9262 chk->data = m_asconf;
9263 chk->send_size = len;
9264 chk->sent = SCTP_DATAGRAM_UNSENT;
9266 chk->asoc = &stcb->asoc;
9269 atomic_add_int(&chk->whoTo->ref_count, 1);
9271 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9272 chk->asoc->ctrl_queue_cnt++;
9277 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9280 * formulate and queue a asconf-ack back to sender. the asconf-ack
9281 * must be stored in the tcb.
9283 struct sctp_tmit_chunk *chk;
9284 struct sctp_asconf_ack *ack, *latest_ack;
9286 struct sctp_nets *net = NULL;
9288 SCTP_TCB_LOCK_ASSERT(stcb);
9289 /* Get the latest ASCONF-ACK */
9290 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9291 if (latest_ack == NULL) {
9294 if (latest_ack->last_sent_to != NULL &&
9295 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9296 /* we're doing a retransmission */
9297 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9300 if (stcb->asoc.last_control_chunk_from == NULL) {
9301 if (stcb->asoc.alternate) {
9302 net = stcb->asoc.alternate;
9304 net = stcb->asoc.primary_destination;
9307 net = stcb->asoc.last_control_chunk_from;
9312 if (stcb->asoc.last_control_chunk_from == NULL) {
9313 if (stcb->asoc.alternate) {
9314 net = stcb->asoc.alternate;
9316 net = stcb->asoc.primary_destination;
9319 net = stcb->asoc.last_control_chunk_from;
9322 latest_ack->last_sent_to = net;
9324 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9325 if (ack->data == NULL) {
9328 /* copy the asconf_ack */
9329 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9330 if (m_ack == NULL) {
9331 /* couldn't copy it */
9334 #ifdef SCTP_MBUF_LOGGING
9335 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9336 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9340 sctp_alloc_a_chunk(stcb, chk);
9344 sctp_m_freem(m_ack);
9347 chk->copy_by_ref = 0;
9348 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9349 chk->rec.chunk_id.can_take_data = 1;
9350 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9353 atomic_add_int(&chk->whoTo->ref_count, 1);
9356 chk->send_size = ack->len;
9357 chk->sent = SCTP_DATAGRAM_UNSENT;
9359 chk->asoc = &stcb->asoc;
9361 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9362 chk->asoc->ctrl_queue_cnt++;
9369 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9370 struct sctp_tcb *stcb,
9371 struct sctp_association *asoc,
9372 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9373 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9379 * send out one MTU of retransmission. If fast_retransmit is
9380 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9381 * rwnd. For a Cookie or Asconf in the control chunk queue we
9382 * retransmit them by themselves.
9384 * For data chunks we will pick out the lowest TSN's in the sent_queue
9385 * marked for resend and bundle them all together (up to a MTU of
9386 * destination). The address to send to should have been
9387 * selected/changed where the retransmission was marked (i.e. in FR
9388 * or t3-timeout routines).
9390 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9391 struct sctp_tmit_chunk *chk, *fwd;
9392 struct mbuf *m, *endofchain;
9393 struct sctp_nets *net = NULL;
9394 uint32_t tsns_sent = 0;
9395 int no_fragmentflg, bundle_at, cnt_thru;
9397 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9398 struct sctp_auth_chunk *auth = NULL;
9399 uint32_t auth_offset = 0;
9400 uint16_t auth_keyid;
9401 int override_ok = 1;
9402 int data_auth_reqd = 0;
9405 SCTP_TCB_LOCK_ASSERT(stcb);
9406 tmr_started = ctl_cnt = bundle_at = error = 0;
9411 endofchain = m = NULL;
9412 auth_keyid = stcb->asoc.authinfo.active_keyid;
9413 #ifdef SCTP_AUDITING_ENABLED
9414 sctp_audit_log(0xC3, 1);
9416 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9417 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9418 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9419 asoc->sent_queue_retran_cnt);
9420 asoc->sent_queue_cnt = 0;
9421 asoc->sent_queue_cnt_removeable = 0;
9422 /* send back 0/0 so we enter normal transmission */
9426 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9427 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9428 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9429 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9430 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9433 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9434 if (chk != asoc->str_reset) {
9436 * not eligible for retran if its
9443 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9447 * Add an AUTH chunk, if chunk requires it save the
9448 * offset into the chain for AUTH
9450 if ((auth == NULL) &&
9451 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9452 stcb->asoc.peer_auth_chunks))) {
9453 m = sctp_add_auth_chunk(m, &endofchain,
9454 &auth, &auth_offset,
9456 chk->rec.chunk_id.id);
9457 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9459 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9465 /* do we have control chunks to retransmit? */
9467 /* Start a timer no matter if we suceed or fail */
9468 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9469 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9470 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9471 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9472 chk->snd_count++; /* update our count */
9473 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9474 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9475 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9476 no_fragmentflg, 0, 0,
9477 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9478 chk->whoTo->port, NULL,
9481 SCTP_STAT_INCR(sctps_lowlevelerr);
9488 * We don't want to mark the net->sent time here since this
9489 * we use this for HB and retrans cannot measure RTT
9491 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9493 chk->sent = SCTP_DATAGRAM_SENT;
9494 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9498 /* Clean up the fwd-tsn list */
9499 sctp_clean_up_ctl(stcb, asoc, so_locked);
9504 * Ok, it is just data retransmission we need to do or that and a
9505 * fwd-tsn with it all.
9507 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9508 return (SCTP_RETRAN_DONE);
9510 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9511 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9512 /* not yet open, resend the cookie and that is it */
9515 #ifdef SCTP_AUDITING_ENABLED
9516 sctp_auditing(20, inp, stcb, NULL);
9518 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9519 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9520 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9521 /* No, not sent to this net or not ready for rtx */
9524 if (chk->data == NULL) {
9525 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9526 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9529 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9530 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9531 struct mbuf *op_err;
9532 char msg[SCTP_DIAG_INFO_LEN];
9534 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
9535 chk->rec.data.TSN_seq, chk->snd_count);
9536 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
9538 atomic_add_int(&stcb->asoc.refcnt, 1);
9539 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
9541 SCTP_TCB_LOCK(stcb);
9542 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9543 return (SCTP_RETRAN_EXIT);
9545 /* pick up the net */
9547 switch (net->ro._l_addr.sa.sa_family) {
9550 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9555 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9564 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9565 /* No room in peers rwnd */
9568 tsn = asoc->last_acked_seq + 1;
9569 if (tsn == chk->rec.data.TSN_seq) {
9571 * we make a special exception for this
9572 * case. The peer has no rwnd but is missing
9573 * the lowest chunk.. which is probably what
9574 * is holding up the rwnd.
9576 goto one_chunk_around;
9581 if (asoc->peers_rwnd < mtu) {
9583 if ((asoc->peers_rwnd == 0) &&
9584 (asoc->total_flight == 0)) {
9585 chk->window_probe = 1;
9586 chk->whoTo->window_probe = 1;
9589 #ifdef SCTP_AUDITING_ENABLED
9590 sctp_audit_log(0xC3, 2);
9594 net->fast_retran_ip = 0;
9595 if (chk->rec.data.doing_fast_retransmit == 0) {
9597 * if no FR in progress skip destination that have
9598 * flight_size > cwnd.
9600 if (net->flight_size >= net->cwnd) {
9605 * Mark the destination net to have FR recovery
9609 net->fast_retran_ip = 1;
9613 * if no AUTH is yet included and this chunk requires it,
9614 * make sure to account for it. We don't apply the size
9615 * until the AUTH chunk is actually added below in case
9616 * there is no room for this chunk.
9618 if (data_auth_reqd && (auth == NULL)) {
9619 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9623 if ((chk->send_size <= (mtu - dmtu)) ||
9624 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9625 /* ok we will add this one */
9626 if (data_auth_reqd) {
9628 m = sctp_add_auth_chunk(m,
9634 auth_keyid = chk->auth_keyid;
9636 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9637 } else if (override_ok) {
9638 auth_keyid = chk->auth_keyid;
9640 } else if (chk->auth_keyid != auth_keyid) {
9641 /* different keyid, so done bundling */
9645 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9647 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9650 /* Do clear IP_DF ? */
9651 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9654 /* upate our MTU size */
9655 if (mtu > (chk->send_size + dmtu))
9656 mtu -= (chk->send_size + dmtu);
9659 data_list[bundle_at++] = chk;
9660 if (one_chunk && (asoc->total_flight <= 0)) {
9661 SCTP_STAT_INCR(sctps_windowprobed);
9664 if (one_chunk == 0) {
9666 * now are there anymore forward from chk to pick
9669 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9670 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9671 /* Nope, not for retran */
9674 if (fwd->whoTo != net) {
9675 /* Nope, not the net in question */
9678 if (data_auth_reqd && (auth == NULL)) {
9679 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9682 if (fwd->send_size <= (mtu - dmtu)) {
9683 if (data_auth_reqd) {
9685 m = sctp_add_auth_chunk(m,
9691 auth_keyid = fwd->auth_keyid;
9693 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9694 } else if (override_ok) {
9695 auth_keyid = fwd->auth_keyid;
9697 } else if (fwd->auth_keyid != auth_keyid) {
9705 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9707 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9710 /* Do clear IP_DF ? */
9711 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9714 /* upate our MTU size */
9715 if (mtu > (fwd->send_size + dmtu))
9716 mtu -= (fwd->send_size + dmtu);
9719 data_list[bundle_at++] = fwd;
9720 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9724 /* can't fit so we are done */
9729 /* Is there something to send for this destination? */
9732 * No matter if we fail/or suceed we should start a
9733 * timer. A failure is like a lost IP packet :-)
9735 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9737 * no timer running on this destination
9740 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9743 /* Now lets send it, if there is anything to send :> */
9744 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9745 (struct sockaddr *)&net->ro._l_addr, m,
9746 auth_offset, auth, auth_keyid,
9747 no_fragmentflg, 0, 0,
9748 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9752 /* error, we could not output */
9753 SCTP_STAT_INCR(sctps_lowlevelerr);
9761 * We don't want to mark the net->sent time here
9762 * since this we use this for HB and retrans cannot
9765 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9767 /* For auto-close */
9769 if (*now_filled == 0) {
9770 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9771 *now = asoc->time_last_sent;
9774 asoc->time_last_sent = *now;
9776 *cnt_out += bundle_at;
9777 #ifdef SCTP_AUDITING_ENABLED
9778 sctp_audit_log(0xC4, bundle_at);
9781 tsns_sent = data_list[0]->rec.data.TSN_seq;
9783 for (i = 0; i < bundle_at; i++) {
9784 SCTP_STAT_INCR(sctps_sendretransdata);
9785 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9787 * When we have a revoked data, and we
9788 * retransmit it, then we clear the revoked
9789 * flag since this flag dictates if we
9790 * subtracted from the fs
9792 if (data_list[i]->rec.data.chunk_was_revoked) {
9793 /* Deflate the cwnd */
9794 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9795 data_list[i]->rec.data.chunk_was_revoked = 0;
9797 data_list[i]->snd_count++;
9798 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9799 /* record the time */
9800 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9801 if (data_list[i]->book_size_scale) {
9803 * need to double the book size on
9806 data_list[i]->book_size_scale = 0;
9808 * Since we double the booksize, we
9809 * must also double the output queue
9810 * size, since this get shrunk when
9811 * we free by this amount.
9813 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9814 data_list[i]->book_size *= 2;
9818 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9819 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9820 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9822 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9823 (uint32_t) (data_list[i]->send_size +
9824 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9826 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9827 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9828 data_list[i]->whoTo->flight_size,
9829 data_list[i]->book_size,
9830 (uintptr_t) data_list[i]->whoTo,
9831 data_list[i]->rec.data.TSN_seq);
9833 sctp_flight_size_increase(data_list[i]);
9834 sctp_total_flight_increase(stcb, data_list[i]);
9835 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9836 /* SWS sender side engages */
9837 asoc->peers_rwnd = 0;
9840 (data_list[i]->rec.data.doing_fast_retransmit)) {
9841 SCTP_STAT_INCR(sctps_sendfastretrans);
9842 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9843 (tmr_started == 0)) {
9845 * ok we just fast-retrans'd
9846 * the lowest TSN, i.e the
9847 * first on the list. In
9848 * this case we want to give
9849 * some more time to get a
9850 * SACK back without a
9853 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9854 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9855 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9859 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9860 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9862 #ifdef SCTP_AUDITING_ENABLED
9863 sctp_auditing(21, inp, stcb, NULL);
9869 if (asoc->sent_queue_retran_cnt <= 0) {
9870 /* all done we have no more to retran */
9871 asoc->sent_queue_retran_cnt = 0;
9875 /* No more room in rwnd */
9878 /* stop the for loop here. we sent out a packet */
9885 sctp_timer_validation(struct sctp_inpcb *inp,
9886 struct sctp_tcb *stcb,
9887 struct sctp_association *asoc)
9889 struct sctp_nets *net;
9891 /* Validate that a timer is running somewhere */
9892 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9893 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9894 /* Here is a timer */
9898 SCTP_TCB_LOCK_ASSERT(stcb);
9899 /* Gak, we did not have a timer somewhere */
9900 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9901 if (asoc->alternate) {
9902 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9904 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9910 sctp_chunk_output(struct sctp_inpcb *inp,
9911 struct sctp_tcb *stcb,
9914 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9920 * Ok this is the generic chunk service queue. we must do the
9922 * - See if there are retransmits pending, if so we must
9924 * - Service the stream queue that is next, moving any
9925 * message (note I must get a complete message i.e.
9926 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9928 * - Check to see if the cwnd/rwnd allows any output, if so we
9929 * go ahead and fomulate and send the low level chunks. Making sure
9930 * to combine any control in the control chunk queue also.
9932 struct sctp_association *asoc;
9933 struct sctp_nets *net;
9934 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9935 unsigned int burst_cnt = 0;
9939 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9942 unsigned int tot_frs = 0;
9946 /* The Nagle algorithm is only applied when handling a send call. */
9947 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9948 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9956 SCTP_TCB_LOCK_ASSERT(stcb);
9958 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9960 if ((un_sent <= 0) &&
9961 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9962 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9963 (asoc->sent_queue_retran_cnt == 0) &&
9964 (asoc->trigger_reset == 0)) {
9965 /* Nothing to do unless there is something to be sent left */
9969 * Do we have something to send, data or control AND a sack timer
9970 * running, if so piggy-back the sack.
9972 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9973 sctp_send_sack(stcb, so_locked);
9974 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9976 while (asoc->sent_queue_retran_cnt) {
9978 * Ok, it is retransmission time only, we send out only ONE
9979 * packet with a single call off to the retran code.
9981 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9983 * Special hook for handling cookiess discarded
9984 * by peer that carried data. Send cookie-ack only
9985 * and then the next call with get the retran's.
9987 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9989 &now, &now_filled, frag_point, so_locked);
9991 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9992 /* if its not from a HB then do it */
9994 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
10000 * its from any other place, we don't allow retran
10001 * output (only control)
10006 /* Can't send anymore */
10008 * now lets push out control by calling med-level
10009 * output once. this assures that we WILL send HB's
10012 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
10014 &now, &now_filled, frag_point, so_locked);
10015 #ifdef SCTP_AUDITING_ENABLED
10016 sctp_auditing(8, inp, stcb, NULL);
10018 sctp_timer_validation(inp, stcb, asoc);
10023 * The count was off.. retran is not happening so do
10024 * the normal retransmission.
10026 #ifdef SCTP_AUDITING_ENABLED
10027 sctp_auditing(9, inp, stcb, NULL);
10029 if (ret == SCTP_RETRAN_EXIT) {
10034 if (from_where == SCTP_OUTPUT_FROM_T3) {
10035 /* Only one transmission allowed out of a timeout */
10036 #ifdef SCTP_AUDITING_ENABLED
10037 sctp_auditing(10, inp, stcb, NULL);
10039 /* Push out any control */
10040 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10041 &now, &now_filled, frag_point, so_locked);
10044 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10045 /* Hit FR burst limit */
10048 if ((num_out == 0) && (ret == 0)) {
10049 /* No more retrans to send */
10053 #ifdef SCTP_AUDITING_ENABLED
10054 sctp_auditing(12, inp, stcb, NULL);
10056 /* Check for bad destinations, if they exist move chunks around. */
10057 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10058 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10060 * if possible move things off of this address we
10061 * still may send below due to the dormant state but
10062 * we try to find an alternate address to send to
10063 * and if we have one we move all queued data on the
10064 * out wheel to this alternate address.
10066 if (net->ref_count > 1)
10067 sctp_move_chunks_from_net(stcb, net);
10070 * if ((asoc->sat_network) || (net->addr_is_local))
10071 * { burst_limit = asoc->max_burst *
10072 * SCTP_SAT_NETWORK_BURST_INCR; }
10074 if (asoc->max_burst > 0) {
10075 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10076 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10078 * JRS - Use the congestion
10079 * control given in the
10080 * congestion control module
10082 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10083 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10084 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10086 SCTP_STAT_INCR(sctps_maxburstqueued);
10088 net->fast_retran_ip = 0;
10090 if (net->flight_size == 0) {
10092 * Should be decaying the
10104 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10105 &reason_code, 0, from_where,
10106 &now, &now_filled, frag_point, so_locked);
10108 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10109 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10110 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10112 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10113 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10114 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10118 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10120 tot_out += num_out;
10122 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10123 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10124 if (num_out == 0) {
10125 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10130 * When the Nagle algorithm is used, look at how
10131 * much is unsent, then if its smaller than an MTU
10132 * and we have data in flight we stop, except if we
10133 * are handling a fragmented user message.
10135 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10136 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10137 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10138 (stcb->asoc.total_flight > 0) &&
10139 ((stcb->asoc.locked_on_sending == NULL) ||
10140 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10144 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10145 TAILQ_EMPTY(&asoc->send_queue) &&
10146 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10147 /* Nothing left to send */
10150 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10151 /* Nothing left to send */
10154 } while (num_out &&
10155 ((asoc->max_burst == 0) ||
10156 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10157 (burst_cnt < asoc->max_burst)));
10159 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10160 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10161 SCTP_STAT_INCR(sctps_maxburstqueued);
10162 asoc->burst_limit_applied = 1;
10163 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10164 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10167 asoc->burst_limit_applied = 0;
10170 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10171 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10173 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10177 * Now we need to clean up the control chunk chain if a ECNE is on
10178 * it. It must be marked as UNSENT again so next call will continue
10179 * to send it until such time that we get a CWR, to remove it.
10181 if (stcb->asoc.ecn_echo_cnt_onq)
10182 sctp_fix_ecn_echo(asoc);
10184 if (stcb->asoc.trigger_reset) {
10185 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
10195 struct sctp_inpcb *inp,
10197 struct sockaddr *addr,
10198 struct mbuf *control,
10203 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10206 if (inp->sctp_socket == NULL) {
10207 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10210 return (sctp_sosend(inp->sctp_socket,
10212 (struct uio *)NULL,
10220 send_forward_tsn(struct sctp_tcb *stcb,
10221 struct sctp_association *asoc)
10223 struct sctp_tmit_chunk *chk;
10224 struct sctp_forward_tsn_chunk *fwdtsn;
10225 uint32_t advance_peer_ack_point;
10227 SCTP_TCB_LOCK_ASSERT(stcb);
10228 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10229 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10230 /* mark it to unsent */
10231 chk->sent = SCTP_DATAGRAM_UNSENT;
10232 chk->snd_count = 0;
10233 /* Do we correct its output location? */
10235 sctp_free_remote_addr(chk->whoTo);
10238 goto sctp_fill_in_rest;
10241 /* Ok if we reach here we must build one */
10242 sctp_alloc_a_chunk(stcb, chk);
10246 asoc->fwd_tsn_cnt++;
10247 chk->copy_by_ref = 0;
10248 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10249 chk->rec.chunk_id.can_take_data = 0;
10253 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10254 if (chk->data == NULL) {
10255 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10258 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10259 chk->sent = SCTP_DATAGRAM_UNSENT;
10260 chk->snd_count = 0;
10261 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10262 asoc->ctrl_queue_cnt++;
10265 * Here we go through and fill out the part that deals with
10266 * stream/seq of the ones we skip.
10268 SCTP_BUF_LEN(chk->data) = 0;
10270 struct sctp_tmit_chunk *at, *tp1, *last;
10271 struct sctp_strseq *strseq;
10272 unsigned int cnt_of_space, i, ovh;
10273 unsigned int space_needed;
10274 unsigned int cnt_of_skipped = 0;
10276 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10277 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10278 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10279 /* no more to look at */
10282 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10283 /* We don't report these */
10288 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10289 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10291 cnt_of_space = M_TRAILINGSPACE(chk->data);
10293 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10294 ovh = SCTP_MIN_OVERHEAD;
10296 ovh = SCTP_MIN_V4_OVERHEAD;
10298 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10299 /* trim to a mtu size */
10300 cnt_of_space = asoc->smallest_mtu - ovh;
10302 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10303 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10304 0xff, 0, cnt_of_skipped,
10305 asoc->advanced_peer_ack_point);
10308 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10309 if (cnt_of_space < space_needed) {
10311 * ok we must trim down the chunk by lowering the
10312 * advance peer ack point.
10314 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10315 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10316 0xff, 0xff, cnt_of_space,
10319 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10320 cnt_of_skipped /= sizeof(struct sctp_strseq);
10322 * Go through and find the TSN that will be the one
10325 at = TAILQ_FIRST(&asoc->sent_queue);
10327 for (i = 0; i < cnt_of_skipped; i++) {
10328 tp1 = TAILQ_NEXT(at, sctp_next);
10335 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10336 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10337 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10338 asoc->advanced_peer_ack_point);
10342 * last now points to last one I can report, update
10346 advance_peer_ack_point = last->rec.data.TSN_seq;
10347 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10348 cnt_of_skipped * sizeof(struct sctp_strseq);
10350 chk->send_size = space_needed;
10351 /* Setup the chunk */
10352 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10353 fwdtsn->ch.chunk_length = htons(chk->send_size);
10354 fwdtsn->ch.chunk_flags = 0;
10355 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10356 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10357 SCTP_BUF_LEN(chk->data) = chk->send_size;
10360 * Move pointer to after the fwdtsn and transfer to the
10363 strseq = (struct sctp_strseq *)fwdtsn;
10365 * Now populate the strseq list. This is done blindly
10366 * without pulling out duplicate stream info. This is
10367 * inefficent but won't harm the process since the peer will
10368 * look at these in sequence and will thus release anything.
10369 * It could mean we exceed the PMTU and chop off some that
10370 * we could have included.. but this is unlikely (aka 1432/4
10371 * would mean 300+ stream seq's would have to be reported in
10372 * one FWD-TSN. With a bit of work we can later FIX this to
10373 * optimize and pull out duplcates.. but it does add more
10374 * overhead. So for now... not!
10376 at = TAILQ_FIRST(&asoc->sent_queue);
10377 for (i = 0; i < cnt_of_skipped; i++) {
10378 tp1 = TAILQ_NEXT(at, sctp_next);
10381 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10382 /* We don't report these */
10387 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10388 at->rec.data.fwd_tsn_cnt = 0;
10390 strseq->stream = ntohs(at->rec.data.stream_number);
10391 strseq->sequence = ntohs(at->rec.data.stream_seq);
10400 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10401 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10407 * Queue up a SACK or NR-SACK in the control queue.
10408 * We must first check to see if a SACK or NR-SACK is
10409 * somehow on the control queue.
10410 * If so, we will take and and remove the old one.
10412 struct sctp_association *asoc;
10413 struct sctp_tmit_chunk *chk, *a_chk;
10414 struct sctp_sack_chunk *sack;
10415 struct sctp_nr_sack_chunk *nr_sack;
10416 struct sctp_gap_ack_block *gap_descriptor;
10417 struct sack_track *selector;
10422 int limit_reached = 0;
10423 unsigned int i, siz, j;
10424 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10427 uint32_t highest_tsn;
10432 if (stcb->asoc.nrsack_supported == 1) {
10433 type = SCTP_NR_SELECTIVE_ACK;
10435 type = SCTP_SELECTIVE_ACK;
10438 asoc = &stcb->asoc;
10439 SCTP_TCB_LOCK_ASSERT(stcb);
10440 if (asoc->last_data_chunk_from == NULL) {
10441 /* Hmm we never received anything */
10444 sctp_slide_mapping_arrays(stcb);
10445 sctp_set_rwnd(stcb, asoc);
10446 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10447 if (chk->rec.chunk_id.id == type) {
10448 /* Hmm, found a sack already on queue, remove it */
10449 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10450 asoc->ctrl_queue_cnt--;
10453 sctp_m_freem(a_chk->data);
10454 a_chk->data = NULL;
10456 if (a_chk->whoTo) {
10457 sctp_free_remote_addr(a_chk->whoTo);
10458 a_chk->whoTo = NULL;
10463 if (a_chk == NULL) {
10464 sctp_alloc_a_chunk(stcb, a_chk);
10465 if (a_chk == NULL) {
10466 /* No memory so we drop the idea, and set a timer */
10467 if (stcb->asoc.delayed_ack) {
10468 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10469 stcb->sctp_ep, stcb, NULL,
10470 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10471 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10472 stcb->sctp_ep, stcb, NULL);
10474 stcb->asoc.send_sack = 1;
10478 a_chk->copy_by_ref = 0;
10479 a_chk->rec.chunk_id.id = type;
10480 a_chk->rec.chunk_id.can_take_data = 1;
10482 /* Clear our pkt counts */
10483 asoc->data_pkts_seen = 0;
10486 a_chk->asoc = asoc;
10487 a_chk->snd_count = 0;
10488 a_chk->send_size = 0; /* fill in later */
10489 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10490 a_chk->whoTo = NULL;
10492 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10494 * Ok, the destination for the SACK is unreachable, lets see if
10495 * we can select an alternate to asoc->last_data_chunk_from
10497 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10498 if (a_chk->whoTo == NULL) {
10499 /* Nope, no alternate */
10500 a_chk->whoTo = asoc->last_data_chunk_from;
10503 a_chk->whoTo = asoc->last_data_chunk_from;
10505 if (a_chk->whoTo) {
10506 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10508 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10509 highest_tsn = asoc->highest_tsn_inside_map;
10511 highest_tsn = asoc->highest_tsn_inside_nr_map;
10513 if (highest_tsn == asoc->cumulative_tsn) {
10515 if (type == SCTP_SELECTIVE_ACK) {
10516 space_req = sizeof(struct sctp_sack_chunk);
10518 space_req = sizeof(struct sctp_nr_sack_chunk);
10521 /* gaps get a cluster */
10522 space_req = MCLBYTES;
10524 /* Ok now lets formulate a MBUF with our sack */
10525 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10526 if ((a_chk->data == NULL) ||
10527 (a_chk->whoTo == NULL)) {
10528 /* rats, no mbuf memory */
10530 /* was a problem with the destination */
10531 sctp_m_freem(a_chk->data);
10532 a_chk->data = NULL;
10534 sctp_free_a_chunk(stcb, a_chk, so_locked);
10535 /* sa_ignore NO_NULL_CHK */
10536 if (stcb->asoc.delayed_ack) {
10537 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10538 stcb->sctp_ep, stcb, NULL,
10539 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10540 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10541 stcb->sctp_ep, stcb, NULL);
10543 stcb->asoc.send_sack = 1;
10547 /* ok, lets go through and fill it in */
10548 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10549 space = M_TRAILINGSPACE(a_chk->data);
10550 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10551 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10553 limit = mtod(a_chk->data, caddr_t);
10558 if ((asoc->sctp_cmt_on_off > 0) &&
10559 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10561 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10562 * received, then set high bit to 1, else 0. Reset
10565 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10566 asoc->cmt_dac_pkts_rcvd = 0;
10568 #ifdef SCTP_ASOCLOG_OF_TSNS
10569 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10570 stcb->asoc.cumack_log_atsnt++;
10571 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10572 stcb->asoc.cumack_log_atsnt = 0;
10575 /* reset the readers interpretation */
10576 stcb->freed_by_sorcv_sincelast = 0;
10578 if (type == SCTP_SELECTIVE_ACK) {
10579 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10581 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10582 if (highest_tsn > asoc->mapping_array_base_tsn) {
10583 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10585 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10589 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10590 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10591 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10592 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10594 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10598 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10601 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10603 if (((type == SCTP_SELECTIVE_ACK) &&
10604 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10605 ((type == SCTP_NR_SELECTIVE_ACK) &&
10606 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10607 /* we have a gap .. maybe */
10608 for (i = 0; i < siz; i++) {
10609 tsn_map = asoc->mapping_array[i];
10610 if (type == SCTP_SELECTIVE_ACK) {
10611 tsn_map |= asoc->nr_mapping_array[i];
10615 * Clear all bits corresponding to TSNs
10616 * smaller or equal to the cumulative TSN.
10618 tsn_map &= (~0U << (1 - offset));
10620 selector = &sack_array[tsn_map];
10621 if (mergeable && selector->right_edge) {
10623 * Backup, left and right edges were ok to
10629 if (selector->num_entries == 0)
10632 for (j = 0; j < selector->num_entries; j++) {
10633 if (mergeable && selector->right_edge) {
10635 * do a merge by NOT setting
10641 * no merge, set the left
10645 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10647 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10650 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10656 if (selector->left_edge) {
10660 if (limit_reached) {
10661 /* Reached the limit stop */
10667 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10668 (limit_reached == 0)) {
10672 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10673 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10675 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10678 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10681 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10683 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10684 /* we have a gap .. maybe */
10685 for (i = 0; i < siz; i++) {
10686 tsn_map = asoc->nr_mapping_array[i];
10689 * Clear all bits corresponding to
10690 * TSNs smaller or equal to the
10693 tsn_map &= (~0U << (1 - offset));
10695 selector = &sack_array[tsn_map];
10696 if (mergeable && selector->right_edge) {
10698 * Backup, left and right edges were
10701 num_nr_gap_blocks--;
10704 if (selector->num_entries == 0)
10707 for (j = 0; j < selector->num_entries; j++) {
10708 if (mergeable && selector->right_edge) {
10710 * do a merge by NOT
10717 * no merge, set the
10721 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10723 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10724 num_nr_gap_blocks++;
10726 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10732 if (selector->left_edge) {
10736 if (limit_reached) {
10737 /* Reached the limit stop */
10744 /* now we must add any dups we are going to report. */
10745 if ((limit_reached == 0) && (asoc->numduptsns)) {
10746 dup = (uint32_t *) gap_descriptor;
10747 for (i = 0; i < asoc->numduptsns; i++) {
10748 *dup = htonl(asoc->dup_tsns[i]);
10751 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10756 asoc->numduptsns = 0;
10759 * now that the chunk is prepared queue it to the control chunk
10762 if (type == SCTP_SELECTIVE_ACK) {
10763 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10764 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10765 num_dups * sizeof(int32_t);
10766 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10767 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10768 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10769 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10770 sack->sack.num_dup_tsns = htons(num_dups);
10771 sack->ch.chunk_type = type;
10772 sack->ch.chunk_flags = flags;
10773 sack->ch.chunk_length = htons(a_chk->send_size);
10775 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10776 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10777 num_dups * sizeof(int32_t);
10778 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10779 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10780 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10781 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10782 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10783 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10784 nr_sack->nr_sack.reserved = 0;
10785 nr_sack->ch.chunk_type = type;
10786 nr_sack->ch.chunk_flags = flags;
10787 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10789 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10790 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10791 asoc->ctrl_queue_cnt++;
10792 asoc->send_sack = 0;
10793 SCTP_STAT_INCR(sctps_sendsacks);
10798 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10799 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10804 struct mbuf *m_abort, *m, *m_last;
10805 struct mbuf *m_out, *m_end = NULL;
10806 struct sctp_abort_chunk *abort;
10807 struct sctp_auth_chunk *auth = NULL;
10808 struct sctp_nets *net;
10810 uint32_t auth_offset = 0;
10811 uint16_t cause_len, chunk_len, padding_len;
10813 SCTP_TCB_LOCK_ASSERT(stcb);
10815 * Add an AUTH chunk, if chunk requires it and save the offset into
10816 * the chain for AUTH
10818 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10819 stcb->asoc.peer_auth_chunks)) {
10820 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10821 stcb, SCTP_ABORT_ASSOCIATION);
10822 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10826 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10827 if (m_abort == NULL) {
10829 sctp_m_freem(m_out);
10832 sctp_m_freem(operr);
10836 /* link in any error */
10837 SCTP_BUF_NEXT(m_abort) = operr;
10840 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10841 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10842 if (SCTP_BUF_NEXT(m) == NULL) {
10846 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10847 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10848 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10849 if (m_out == NULL) {
10850 /* NO Auth chunk prepended, so reserve space in front */
10851 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10854 /* Put AUTH chunk at the front of the chain */
10855 SCTP_BUF_NEXT(m_end) = m_abort;
10857 if (stcb->asoc.alternate) {
10858 net = stcb->asoc.alternate;
10860 net = stcb->asoc.primary_destination;
10862 /* Fill in the ABORT chunk header. */
10863 abort = mtod(m_abort, struct sctp_abort_chunk *);
10864 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10865 if (stcb->asoc.peer_vtag == 0) {
10866 /* This happens iff the assoc is in COOKIE-WAIT state. */
10867 vtag = stcb->asoc.my_vtag;
10868 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10870 vtag = stcb->asoc.peer_vtag;
10871 abort->ch.chunk_flags = 0;
10873 abort->ch.chunk_length = htons(chunk_len);
10874 /* Add padding, if necessary. */
10875 if (padding_len > 0) {
10876 if ((m_last == NULL) ||
10877 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10878 sctp_m_freem(m_out);
10882 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10883 (struct sockaddr *)&net->ro._l_addr,
10884 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10885 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10886 stcb->asoc.primary_destination->port, NULL,
10889 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10893 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10894 struct sctp_nets *net,
10897 /* formulate and SEND a SHUTDOWN-COMPLETE */
10898 struct mbuf *m_shutdown_comp;
10899 struct sctp_shutdown_complete_chunk *shutdown_complete;
10903 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10904 if (m_shutdown_comp == NULL) {
10908 if (reflect_vtag) {
10909 flags = SCTP_HAD_NO_TCB;
10910 vtag = stcb->asoc.my_vtag;
10913 vtag = stcb->asoc.peer_vtag;
10915 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10916 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10917 shutdown_complete->ch.chunk_flags = flags;
10918 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10919 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10920 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10921 (struct sockaddr *)&net->ro._l_addr,
10922 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10923 stcb->sctp_ep->sctp_lport, stcb->rport,
10927 SCTP_SO_NOT_LOCKED);
10928 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10933 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10934 struct sctphdr *sh, uint32_t vtag,
10935 uint8_t type, struct mbuf *cause,
10936 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
10937 uint32_t vrf_id, uint16_t port)
10939 struct mbuf *o_pak;
10941 struct sctphdr *shout;
10942 struct sctp_chunkhdr *ch;
10944 #if defined(INET) || defined(INET6)
10945 struct udphdr *udp;
10949 int len, cause_len, padding_len;
10952 struct sockaddr_in *src_sin, *dst_sin;
10957 struct sockaddr_in6 *src_sin6, *dst_sin6;
10958 struct ip6_hdr *ip6;
10962 /* Compute the length of the cause and add final padding. */
10964 if (cause != NULL) {
10965 struct mbuf *m_at, *m_last = NULL;
10967 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10968 if (SCTP_BUF_NEXT(m_at) == NULL)
10970 cause_len += SCTP_BUF_LEN(m_at);
10972 padding_len = cause_len % 4;
10973 if (padding_len != 0) {
10974 padding_len = 4 - padding_len;
10976 if (padding_len != 0) {
10977 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10978 sctp_m_freem(cause);
10985 /* Get an mbuf for the header. */
10986 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10987 switch (dst->sa_family) {
10990 len += sizeof(struct ip);
10995 len += sizeof(struct ip6_hdr);
11001 #if defined(INET) || defined(INET6)
11003 len += sizeof(struct udphdr);
11006 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
11007 if (mout == NULL) {
11009 sctp_m_freem(cause);
11013 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11014 SCTP_BUF_LEN(mout) = len;
11015 SCTP_BUF_NEXT(mout) = cause;
11016 M_SETFIB(mout, fibnum);
11017 mout->m_pkthdr.flowid = mflowid;
11018 M_HASHTYPE_SET(mout, mflowtype);
11025 switch (dst->sa_family) {
11028 src_sin = (struct sockaddr_in *)src;
11029 dst_sin = (struct sockaddr_in *)dst;
11030 ip = mtod(mout, struct ip *);
11031 ip->ip_v = IPVERSION;
11032 ip->ip_hl = (sizeof(struct ip) >> 2);
11036 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
11038 ip->ip_p = IPPROTO_UDP;
11040 ip->ip_p = IPPROTO_SCTP;
11042 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
11043 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
11045 len = sizeof(struct ip);
11046 shout = (struct sctphdr *)((caddr_t)ip + len);
11051 src_sin6 = (struct sockaddr_in6 *)src;
11052 dst_sin6 = (struct sockaddr_in6 *)dst;
11053 ip6 = mtod(mout, struct ip6_hdr *);
11054 ip6->ip6_flow = htonl(0x60000000);
11055 if (V_ip6_auto_flowlabel) {
11056 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
11058 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
11060 ip6->ip6_nxt = IPPROTO_UDP;
11062 ip6->ip6_nxt = IPPROTO_SCTP;
11064 ip6->ip6_src = dst_sin6->sin6_addr;
11065 ip6->ip6_dst = src_sin6->sin6_addr;
11066 len = sizeof(struct ip6_hdr);
11067 shout = (struct sctphdr *)((caddr_t)ip6 + len);
11072 shout = mtod(mout, struct sctphdr *);
11075 #if defined(INET) || defined(INET6)
11077 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11078 sctp_m_freem(mout);
11081 udp = (struct udphdr *)shout;
11082 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11083 udp->uh_dport = port;
11085 udp->uh_ulen = htons(sizeof(struct udphdr) +
11086 sizeof(struct sctphdr) +
11087 sizeof(struct sctp_chunkhdr) +
11088 cause_len + padding_len);
11089 len += sizeof(struct udphdr);
11090 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11095 shout->src_port = sh->dest_port;
11096 shout->dest_port = sh->src_port;
11097 shout->checksum = 0;
11099 shout->v_tag = htonl(vtag);
11101 shout->v_tag = sh->v_tag;
11103 len += sizeof(struct sctphdr);
11104 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11105 ch->chunk_type = type;
11107 ch->chunk_flags = 0;
11109 ch->chunk_flags = SCTP_HAD_NO_TCB;
11111 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11112 len += sizeof(struct sctp_chunkhdr);
11113 len += cause_len + padding_len;
11115 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11116 sctp_m_freem(mout);
11119 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11120 switch (dst->sa_family) {
11125 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11130 ip->ip_len = htons(len);
11132 #if defined(SCTP_WITH_NO_CSUM)
11133 SCTP_STAT_INCR(sctps_sendnocrc);
11135 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11136 SCTP_STAT_INCR(sctps_sendswcrc);
11139 SCTP_ENABLE_UDP_CSUM(o_pak);
11142 #if defined(SCTP_WITH_NO_CSUM)
11143 SCTP_STAT_INCR(sctps_sendnocrc);
11145 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11146 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11147 SCTP_STAT_INCR(sctps_sendhwcrc);
11150 #ifdef SCTP_PACKET_LOGGING
11151 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11152 sctp_packet_log(o_pak);
11155 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11160 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11162 #if defined(SCTP_WITH_NO_CSUM)
11163 SCTP_STAT_INCR(sctps_sendnocrc);
11165 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11166 SCTP_STAT_INCR(sctps_sendswcrc);
11168 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11169 udp->uh_sum = 0xffff;
11172 #if defined(SCTP_WITH_NO_CSUM)
11173 SCTP_STAT_INCR(sctps_sendnocrc);
11175 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11176 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11177 SCTP_STAT_INCR(sctps_sendhwcrc);
11180 #ifdef SCTP_PACKET_LOGGING
11181 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11182 sctp_packet_log(o_pak);
11185 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11189 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11191 sctp_m_freem(mout);
11192 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11195 SCTP_STAT_INCR(sctps_sendpackets);
11196 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11197 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11202 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11203 struct sctphdr *sh,
11204 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
11205 uint32_t vrf_id, uint16_t port)
11207 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11208 mflowtype, mflowid, fibnum,
11213 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11214 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11219 struct sctp_tmit_chunk *chk;
11220 struct sctp_heartbeat_chunk *hb;
11221 struct timeval now;
11223 SCTP_TCB_LOCK_ASSERT(stcb);
11227 (void)SCTP_GETTIME_TIMEVAL(&now);
11228 switch (net->ro._l_addr.sa.sa_family) {
11240 sctp_alloc_a_chunk(stcb, chk);
11242 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11245 chk->copy_by_ref = 0;
11246 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11247 chk->rec.chunk_id.can_take_data = 1;
11249 chk->asoc = &stcb->asoc;
11250 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11252 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11253 if (chk->data == NULL) {
11254 sctp_free_a_chunk(stcb, chk, so_locked);
11257 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11258 SCTP_BUF_LEN(chk->data) = chk->send_size;
11259 chk->sent = SCTP_DATAGRAM_UNSENT;
11260 chk->snd_count = 0;
11262 atomic_add_int(&chk->whoTo->ref_count, 1);
11263 /* Now we have a mbuf that we can fill in with the details */
11264 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11265 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11266 /* fill out chunk header */
11267 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11268 hb->ch.chunk_flags = 0;
11269 hb->ch.chunk_length = htons(chk->send_size);
11270 /* Fill out hb parameter */
11271 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11272 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11273 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11274 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11275 /* Did our user request this one, put it in */
11276 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11277 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11278 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11280 * we only take from the entropy pool if the address is not
11283 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11284 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11286 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11287 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11289 switch (net->ro._l_addr.sa.sa_family) {
11292 memcpy(hb->heartbeat.hb_info.address,
11293 &net->ro._l_addr.sin.sin_addr,
11294 sizeof(net->ro._l_addr.sin.sin_addr));
11299 memcpy(hb->heartbeat.hb_info.address,
11300 &net->ro._l_addr.sin6.sin6_addr,
11301 sizeof(net->ro._l_addr.sin6.sin6_addr));
11306 sctp_m_freem(chk->data);
11309 sctp_free_a_chunk(stcb, chk, so_locked);
11313 net->hb_responded = 0;
11314 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11315 stcb->asoc.ctrl_queue_cnt++;
11316 SCTP_STAT_INCR(sctps_sendheartbeat);
11321 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11324 struct sctp_association *asoc;
11325 struct sctp_ecne_chunk *ecne;
11326 struct sctp_tmit_chunk *chk;
11331 asoc = &stcb->asoc;
11332 SCTP_TCB_LOCK_ASSERT(stcb);
11333 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11334 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11335 /* found a previous ECN_ECHO update it if needed */
11336 uint32_t cnt, ctsn;
11338 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11339 ctsn = ntohl(ecne->tsn);
11340 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11341 ecne->tsn = htonl(high_tsn);
11342 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11344 cnt = ntohl(ecne->num_pkts_since_cwr);
11346 ecne->num_pkts_since_cwr = htonl(cnt);
11350 /* nope could not find one to update so we must build one */
11351 sctp_alloc_a_chunk(stcb, chk);
11355 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11356 chk->copy_by_ref = 0;
11357 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11358 chk->rec.chunk_id.can_take_data = 0;
11360 chk->asoc = &stcb->asoc;
11361 chk->send_size = sizeof(struct sctp_ecne_chunk);
11362 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11363 if (chk->data == NULL) {
11364 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11367 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11368 SCTP_BUF_LEN(chk->data) = chk->send_size;
11369 chk->sent = SCTP_DATAGRAM_UNSENT;
11370 chk->snd_count = 0;
11372 atomic_add_int(&chk->whoTo->ref_count, 1);
11374 stcb->asoc.ecn_echo_cnt_onq++;
11375 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11376 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11377 ecne->ch.chunk_flags = 0;
11378 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11379 ecne->tsn = htonl(high_tsn);
11380 ecne->num_pkts_since_cwr = htonl(1);
11381 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11382 asoc->ctrl_queue_cnt++;
11386 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11387 struct mbuf *m, int len, int iphlen, int bad_crc)
11389 struct sctp_association *asoc;
11390 struct sctp_pktdrop_chunk *drp;
11391 struct sctp_tmit_chunk *chk;
11397 struct sctp_chunkhdr *ch, chunk_buf;
11398 unsigned int chk_length;
11403 asoc = &stcb->asoc;
11404 SCTP_TCB_LOCK_ASSERT(stcb);
11405 if (asoc->pktdrop_supported == 0) {
11407 * peer must declare support before I send one.
11411 if (stcb->sctp_socket == NULL) {
11414 sctp_alloc_a_chunk(stcb, chk);
11418 chk->copy_by_ref = 0;
11419 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11420 chk->rec.chunk_id.can_take_data = 1;
11423 chk->send_size = len;
11424 /* Validate that we do not have an ABORT in here. */
11425 offset = iphlen + sizeof(struct sctphdr);
11426 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11427 sizeof(*ch), (uint8_t *) & chunk_buf);
11428 while (ch != NULL) {
11429 chk_length = ntohs(ch->chunk_length);
11430 if (chk_length < sizeof(*ch)) {
11431 /* break to abort land */
11434 switch (ch->chunk_type) {
11435 case SCTP_PACKET_DROPPED:
11436 case SCTP_ABORT_ASSOCIATION:
11437 case SCTP_INITIATION_ACK:
11439 * We don't respond with an PKT-DROP to an ABORT
11440 * or PKT-DROP. We also do not respond to an
11441 * INIT-ACK, because we can't know if the initiation
11442 * tag is correct or not.
11444 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11449 offset += SCTP_SIZE32(chk_length);
11450 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11451 sizeof(*ch), (uint8_t *) & chunk_buf);
11454 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11455 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11457 * only send 1 mtu worth, trim off the excess on the end.
11460 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11463 chk->asoc = &stcb->asoc;
11464 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11465 if (chk->data == NULL) {
11467 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11470 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11471 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11473 sctp_m_freem(chk->data);
11477 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11478 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11479 chk->book_size_scale = 0;
11481 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11482 drp->trunc_len = htons(fullsz);
11484 * Len is already adjusted to size minus overhead above take
11485 * out the pkt_drop chunk itself from it.
11487 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11488 len = chk->send_size;
11490 /* no truncation needed */
11491 drp->ch.chunk_flags = 0;
11492 drp->trunc_len = htons(0);
11495 drp->ch.chunk_flags |= SCTP_BADCRC;
11497 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11498 SCTP_BUF_LEN(chk->data) = chk->send_size;
11499 chk->sent = SCTP_DATAGRAM_UNSENT;
11500 chk->snd_count = 0;
11502 /* we should hit here */
11504 atomic_add_int(&chk->whoTo->ref_count, 1);
11508 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11509 drp->ch.chunk_length = htons(chk->send_size);
11510 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11514 drp->bottle_bw = htonl(spc);
11515 if (asoc->my_rwnd) {
11516 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11517 asoc->size_on_all_streams +
11518 asoc->my_rwnd_control_len +
11519 stcb->sctp_socket->so_rcv.sb_cc);
11522 * If my rwnd is 0, possibly from mbuf depletion as well as
11523 * space used, tell the peer there is NO space aka onq == bw
11525 drp->current_onq = htonl(spc);
11529 m_copydata(m, iphlen, len, (caddr_t)datap);
11530 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11531 asoc->ctrl_queue_cnt++;
11535 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11537 struct sctp_association *asoc;
11538 struct sctp_cwr_chunk *cwr;
11539 struct sctp_tmit_chunk *chk;
11541 SCTP_TCB_LOCK_ASSERT(stcb);
11545 asoc = &stcb->asoc;
11546 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11547 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11549 * found a previous CWR queued to same destination
11550 * update it if needed
11554 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11555 ctsn = ntohl(cwr->tsn);
11556 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11557 cwr->tsn = htonl(high_tsn);
11559 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11560 /* Make sure override is carried */
11561 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11566 sctp_alloc_a_chunk(stcb, chk);
11570 chk->copy_by_ref = 0;
11571 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11572 chk->rec.chunk_id.can_take_data = 1;
11574 chk->asoc = &stcb->asoc;
11575 chk->send_size = sizeof(struct sctp_cwr_chunk);
11576 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11577 if (chk->data == NULL) {
11578 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11581 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11582 SCTP_BUF_LEN(chk->data) = chk->send_size;
11583 chk->sent = SCTP_DATAGRAM_UNSENT;
11584 chk->snd_count = 0;
11586 atomic_add_int(&chk->whoTo->ref_count, 1);
11587 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11588 cwr->ch.chunk_type = SCTP_ECN_CWR;
11589 cwr->ch.chunk_flags = override;
11590 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11591 cwr->tsn = htonl(high_tsn);
11592 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11593 asoc->ctrl_queue_cnt++;
11597 sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
11598 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11600 uint16_t len, old_len, i;
11601 struct sctp_stream_reset_out_request *req_out;
11602 struct sctp_chunkhdr *ch;
11604 int number_entries = 0;
11606 ch = mtod(chk->data, struct sctp_chunkhdr *);
11607 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11608 /* get to new offset for the param. */
11609 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11610 /* now how long will this param be? */
11611 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11612 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11613 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11614 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11618 if (number_entries == 0) {
11621 if (number_entries == stcb->asoc.streamoutcnt) {
11622 number_entries = 0;
11624 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
11625 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
11627 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11628 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11629 req_out->ph.param_length = htons(len);
11630 req_out->request_seq = htonl(seq);
11631 req_out->response_seq = htonl(resp_seq);
11632 req_out->send_reset_at_tsn = htonl(last_sent);
11634 if (number_entries) {
11635 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11636 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
11637 (stcb->asoc.strmout[i].chunks_on_queues == 0) &&
11638 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
11639 req_out->list_of_streams[at] = htons(i);
11641 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11642 if (at >= number_entries) {
11648 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11649 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
11652 if (SCTP_SIZE32(len) > len) {
11654 * Need to worry about the pad we may end up adding to the
11655 * end. This is easy since the struct is either aligned to 4
11656 * bytes or 2 bytes off.
11658 req_out->list_of_streams[number_entries] = 0;
11660 /* now fix the chunk length */
11661 ch->chunk_length = htons(len + old_len);
11662 chk->book_size = len + old_len;
11663 chk->book_size_scale = 0;
11664 chk->send_size = SCTP_SIZE32(chk->book_size);
11665 SCTP_BUF_LEN(chk->data) = chk->send_size;
11670 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11671 int number_entries, uint16_t * list,
11674 uint16_t len, old_len, i;
11675 struct sctp_stream_reset_in_request *req_in;
11676 struct sctp_chunkhdr *ch;
11678 ch = mtod(chk->data, struct sctp_chunkhdr *);
11679 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11681 /* get to new offset for the param. */
11682 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11683 /* now how long will this param be? */
11684 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11685 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11686 req_in->ph.param_length = htons(len);
11687 req_in->request_seq = htonl(seq);
11688 if (number_entries) {
11689 for (i = 0; i < number_entries; i++) {
11690 req_in->list_of_streams[i] = htons(list[i]);
11693 if (SCTP_SIZE32(len) > len) {
11695 * Need to worry about the pad we may end up adding to the
11696 * end. This is easy since the struct is either aligned to 4
11697 * bytes or 2 bytes off.
11699 req_in->list_of_streams[number_entries] = 0;
11701 /* now fix the chunk length */
11702 ch->chunk_length = htons(len + old_len);
11703 chk->book_size = len + old_len;
11704 chk->book_size_scale = 0;
11705 chk->send_size = SCTP_SIZE32(chk->book_size);
11706 SCTP_BUF_LEN(chk->data) = chk->send_size;
11711 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11714 uint16_t len, old_len;
11715 struct sctp_stream_reset_tsn_request *req_tsn;
11716 struct sctp_chunkhdr *ch;
11718 ch = mtod(chk->data, struct sctp_chunkhdr *);
11719 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11721 /* get to new offset for the param. */
11722 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11723 /* now how long will this param be? */
11724 len = sizeof(struct sctp_stream_reset_tsn_request);
11725 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11726 req_tsn->ph.param_length = htons(len);
11727 req_tsn->request_seq = htonl(seq);
11729 /* now fix the chunk length */
11730 ch->chunk_length = htons(len + old_len);
11731 chk->send_size = len + old_len;
11732 chk->book_size = SCTP_SIZE32(chk->send_size);
11733 chk->book_size_scale = 0;
11734 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11739 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11740 uint32_t resp_seq, uint32_t result)
11742 uint16_t len, old_len;
11743 struct sctp_stream_reset_response *resp;
11744 struct sctp_chunkhdr *ch;
11746 ch = mtod(chk->data, struct sctp_chunkhdr *);
11747 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11749 /* get to new offset for the param. */
11750 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11751 /* now how long will this param be? */
11752 len = sizeof(struct sctp_stream_reset_response);
11753 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11754 resp->ph.param_length = htons(len);
11755 resp->response_seq = htonl(resp_seq);
11756 resp->result = ntohl(result);
11758 /* now fix the chunk length */
11759 ch->chunk_length = htons(len + old_len);
11760 chk->book_size = len + old_len;
11761 chk->book_size_scale = 0;
11762 chk->send_size = SCTP_SIZE32(chk->book_size);
11763 SCTP_BUF_LEN(chk->data) = chk->send_size;
11768 sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
11769 struct sctp_stream_reset_list *ent,
11772 struct sctp_association *asoc;
11773 struct sctp_tmit_chunk *chk;
11774 struct sctp_chunkhdr *ch;
11776 asoc = &stcb->asoc;
11779 * Reset our last reset action to the new one IP -> response
11780 * (PERFORMED probably). This assures that if we fail to send, a
11781 * retran from the peer will get the new response.
11783 asoc->last_reset_action[0] = response;
11784 if (asoc->stream_reset_outstanding) {
11787 sctp_alloc_a_chunk(stcb, chk);
11789 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11792 chk->copy_by_ref = 0;
11793 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11794 chk->rec.chunk_id.can_take_data = 0;
11796 chk->asoc = &stcb->asoc;
11797 chk->book_size = sizeof(struct sctp_chunkhdr);
11798 chk->send_size = SCTP_SIZE32(chk->book_size);
11799 chk->book_size_scale = 0;
11800 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11801 if (chk->data == NULL) {
11802 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11803 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11806 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11807 sctp_add_stream_reset_result(chk, ent->seq, response);
11808 /* setup chunk parameters */
11809 chk->sent = SCTP_DATAGRAM_UNSENT;
11810 chk->snd_count = 0;
11811 if (stcb->asoc.alternate) {
11812 chk->whoTo = stcb->asoc.alternate;
11814 chk->whoTo = stcb->asoc.primary_destination;
11816 ch = mtod(chk->data, struct sctp_chunkhdr *);
11817 ch->chunk_type = SCTP_STREAM_RESET;
11818 ch->chunk_flags = 0;
11819 ch->chunk_length = htons(chk->book_size);
11820 atomic_add_int(&chk->whoTo->ref_count, 1);
11821 SCTP_BUF_LEN(chk->data) = chk->send_size;
11822 /* insert the chunk for sending */
11823 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11826 asoc->ctrl_queue_cnt++;
11830 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11831 uint32_t resp_seq, uint32_t result,
11832 uint32_t send_una, uint32_t recv_next)
11834 uint16_t len, old_len;
11835 struct sctp_stream_reset_response_tsn *resp;
11836 struct sctp_chunkhdr *ch;
11838 ch = mtod(chk->data, struct sctp_chunkhdr *);
11839 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11841 /* get to new offset for the param. */
11842 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11843 /* now how long will this param be? */
11844 len = sizeof(struct sctp_stream_reset_response_tsn);
11845 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11846 resp->ph.param_length = htons(len);
11847 resp->response_seq = htonl(resp_seq);
11848 resp->result = htonl(result);
11849 resp->senders_next_tsn = htonl(send_una);
11850 resp->receivers_next_tsn = htonl(recv_next);
11852 /* now fix the chunk length */
11853 ch->chunk_length = htons(len + old_len);
11854 chk->book_size = len + old_len;
11855 chk->send_size = SCTP_SIZE32(chk->book_size);
11856 chk->book_size_scale = 0;
11857 SCTP_BUF_LEN(chk->data) = chk->send_size;
11862 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11866 uint16_t len, old_len;
11867 struct sctp_chunkhdr *ch;
11868 struct sctp_stream_reset_add_strm *addstr;
11870 ch = mtod(chk->data, struct sctp_chunkhdr *);
11871 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11873 /* get to new offset for the param. */
11874 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11875 /* now how long will this param be? */
11876 len = sizeof(struct sctp_stream_reset_add_strm);
11879 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11880 addstr->ph.param_length = htons(len);
11881 addstr->request_seq = htonl(seq);
11882 addstr->number_of_streams = htons(adding);
11883 addstr->reserved = 0;
11885 /* now fix the chunk length */
11886 ch->chunk_length = htons(len + old_len);
11887 chk->send_size = len + old_len;
11888 chk->book_size = SCTP_SIZE32(chk->send_size);
11889 chk->book_size_scale = 0;
11890 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11895 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11899 uint16_t len, old_len;
11900 struct sctp_chunkhdr *ch;
11901 struct sctp_stream_reset_add_strm *addstr;
11903 ch = mtod(chk->data, struct sctp_chunkhdr *);
11904 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11906 /* get to new offset for the param. */
11907 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11908 /* now how long will this param be? */
11909 len = sizeof(struct sctp_stream_reset_add_strm);
11911 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11912 addstr->ph.param_length = htons(len);
11913 addstr->request_seq = htonl(seq);
11914 addstr->number_of_streams = htons(adding);
11915 addstr->reserved = 0;
11917 /* now fix the chunk length */
11918 ch->chunk_length = htons(len + old_len);
11919 chk->send_size = len + old_len;
11920 chk->book_size = SCTP_SIZE32(chk->send_size);
11921 chk->book_size_scale = 0;
11922 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11927 sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
11929 struct sctp_association *asoc;
11930 struct sctp_tmit_chunk *chk;
11931 struct sctp_chunkhdr *ch;
11934 asoc = &stcb->asoc;
11935 asoc->trigger_reset = 0;
11936 if (asoc->stream_reset_outstanding) {
11939 sctp_alloc_a_chunk(stcb, chk);
11941 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11944 chk->copy_by_ref = 0;
11945 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11946 chk->rec.chunk_id.can_take_data = 0;
11948 chk->asoc = &stcb->asoc;
11949 chk->book_size = sizeof(struct sctp_chunkhdr);
11950 chk->send_size = SCTP_SIZE32(chk->book_size);
11951 chk->book_size_scale = 0;
11952 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11953 if (chk->data == NULL) {
11954 sctp_free_a_chunk(stcb, chk, so_locked);
11955 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11958 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11960 /* setup chunk parameters */
11961 chk->sent = SCTP_DATAGRAM_UNSENT;
11962 chk->snd_count = 0;
11963 if (stcb->asoc.alternate) {
11964 chk->whoTo = stcb->asoc.alternate;
11966 chk->whoTo = stcb->asoc.primary_destination;
11968 ch = mtod(chk->data, struct sctp_chunkhdr *);
11969 ch->chunk_type = SCTP_STREAM_RESET;
11970 ch->chunk_flags = 0;
11971 ch->chunk_length = htons(chk->book_size);
11972 atomic_add_int(&chk->whoTo->ref_count, 1);
11973 SCTP_BUF_LEN(chk->data) = chk->send_size;
11974 seq = stcb->asoc.str_reset_seq_out;
11975 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
11977 asoc->stream_reset_outstanding++;
11979 m_freem(chk->data);
11981 sctp_free_a_chunk(stcb, chk, so_locked);
11984 asoc->str_reset = chk;
11985 /* insert the chunk for sending */
11986 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11989 asoc->ctrl_queue_cnt++;
11991 if (stcb->asoc.send_sack) {
11992 sctp_send_sack(stcb, so_locked);
11994 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11999 sctp_send_str_reset_req(struct sctp_tcb *stcb,
12000 uint16_t number_entries, uint16_t * list,
12001 uint8_t send_in_req,
12002 uint8_t send_tsn_req,
12003 uint8_t add_stream,
12005 uint16_t adding_i, uint8_t peer_asked)
12007 struct sctp_association *asoc;
12008 struct sctp_tmit_chunk *chk;
12009 struct sctp_chunkhdr *ch;
12010 int can_send_out_req = 0;
12013 asoc = &stcb->asoc;
12014 if (asoc->stream_reset_outstanding) {
12016 * Already one pending, must get ACK back to clear the flag.
12018 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
12021 if ((send_in_req == 0) && (send_tsn_req == 0) &&
12022 (add_stream == 0)) {
12023 /* nothing to do */
12024 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12027 if (send_tsn_req && send_in_req) {
12028 /* error, can't do that */
12029 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12031 } else if (send_in_req) {
12032 can_send_out_req = 1;
12034 if (number_entries > (MCLBYTES -
12035 SCTP_MIN_OVERHEAD -
12036 sizeof(struct sctp_chunkhdr) -
12037 sizeof(struct sctp_stream_reset_out_request)) /
12038 sizeof(uint16_t)) {
12039 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12042 sctp_alloc_a_chunk(stcb, chk);
12044 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12047 chk->copy_by_ref = 0;
12048 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
12049 chk->rec.chunk_id.can_take_data = 0;
12051 chk->asoc = &stcb->asoc;
12052 chk->book_size = sizeof(struct sctp_chunkhdr);
12053 chk->send_size = SCTP_SIZE32(chk->book_size);
12054 chk->book_size_scale = 0;
12056 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
12057 if (chk->data == NULL) {
12058 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
12059 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12062 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
12064 /* setup chunk parameters */
12065 chk->sent = SCTP_DATAGRAM_UNSENT;
12066 chk->snd_count = 0;
12067 if (stcb->asoc.alternate) {
12068 chk->whoTo = stcb->asoc.alternate;
12070 chk->whoTo = stcb->asoc.primary_destination;
12072 atomic_add_int(&chk->whoTo->ref_count, 1);
12073 ch = mtod(chk->data, struct sctp_chunkhdr *);
12074 ch->chunk_type = SCTP_STREAM_RESET;
12075 ch->chunk_flags = 0;
12076 ch->chunk_length = htons(chk->book_size);
12077 SCTP_BUF_LEN(chk->data) = chk->send_size;
12079 seq = stcb->asoc.str_reset_seq_out;
12080 if (can_send_out_req) {
12083 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
12086 asoc->stream_reset_outstanding++;
12089 if ((add_stream & 1) &&
12090 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
12091 /* Need to allocate more */
12092 struct sctp_stream_out *oldstream;
12093 struct sctp_stream_queue_pending *sp, *nsp;
12096 #if defined(SCTP_DETAILED_STR_STATS)
12101 oldstream = stcb->asoc.strmout;
12102 /* get some more */
12103 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
12104 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
12106 if (stcb->asoc.strmout == NULL) {
12109 stcb->asoc.strmout = oldstream;
12110 /* Turn off the bit */
12111 x = add_stream & 0xfe;
12116 * Ok now we proceed with copying the old out stuff and
12117 * initializing the new stuff.
12119 SCTP_TCB_SEND_LOCK(stcb);
12120 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
12121 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
12122 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12123 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
12124 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
12125 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
12126 stcb->asoc.strmout[i].stream_no = i;
12127 stcb->asoc.strmout[i].state = oldstream[i].state;
12128 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
12129 /* now anything on those queues? */
12130 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
12131 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
12132 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
12134 /* Now move assoc pointers too */
12135 if (stcb->asoc.last_out_stream == &oldstream[i]) {
12136 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
12138 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
12139 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
12142 /* now the new streams */
12143 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
12144 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
12145 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
12146 stcb->asoc.strmout[i].chunks_on_queues = 0;
12147 #if defined(SCTP_DETAILED_STR_STATS)
12148 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
12149 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
12150 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
12153 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
12154 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
12156 stcb->asoc.strmout[i].next_sequence_send = 0x0;
12157 stcb->asoc.strmout[i].stream_no = i;
12158 stcb->asoc.strmout[i].last_msg_incomplete = 0;
12159 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
12160 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
12162 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
12163 SCTP_FREE(oldstream, SCTP_M_STRMO);
12164 SCTP_TCB_SEND_UNLOCK(stcb);
12167 if ((add_stream & 1) && (adding_o > 0)) {
12168 asoc->strm_pending_add_size = adding_o;
12169 asoc->peer_req_out = peer_asked;
12170 sctp_add_an_out_stream(chk, seq, adding_o);
12172 asoc->stream_reset_outstanding++;
12174 if ((add_stream & 2) && (adding_i > 0)) {
12175 sctp_add_an_in_stream(chk, seq, adding_i);
12177 asoc->stream_reset_outstanding++;
12180 sctp_add_stream_reset_in(chk, number_entries, list, seq);
12182 asoc->stream_reset_outstanding++;
12184 if (send_tsn_req) {
12185 sctp_add_stream_reset_tsn(chk, seq);
12186 asoc->stream_reset_outstanding++;
12188 asoc->str_reset = chk;
12189 /* insert the chunk for sending */
12190 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
12193 asoc->ctrl_queue_cnt++;
12194 if (stcb->asoc.send_sack) {
12195 sctp_send_sack(stcb, SCTP_SO_LOCKED);
12197 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
12202 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
12203 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12204 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12205 uint32_t vrf_id, uint16_t port)
12207 /* Don't respond to an ABORT with an ABORT. */
12208 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
12210 sctp_m_freem(cause);
12213 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
12214 mflowtype, mflowid, fibnum,
12220 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
12221 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
12222 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
12223 uint32_t vrf_id, uint16_t port)
12225 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
12226 mflowtype, mflowid, fibnum,
12231 static struct mbuf *
12232 sctp_copy_resume(struct uio *uio,
12234 int user_marks_eor,
12237 struct mbuf **new_tail)
12241 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12242 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12244 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12247 *sndout = m_length(m, NULL);
12248 *new_tail = m_last(m);
12254 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12258 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12260 if (sp->data == NULL) {
12261 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
12264 sp->tail_mbuf = m_last(sp->data);
12270 static struct sctp_stream_queue_pending *
12271 sctp_copy_it_in(struct sctp_tcb *stcb,
12272 struct sctp_association *asoc,
12273 struct sctp_sndrcvinfo *srcv,
12275 struct sctp_nets *net,
12277 int user_marks_eor,
12281 * This routine must be very careful in its work. Protocol
12282 * processing is up and running so care must be taken to spl...()
12283 * when you need to do something that may effect the stcb/asoc. The
12284 * sb is locked however. When data is copied the protocol processing
12285 * should be enabled since this is a slower operation...
12287 struct sctp_stream_queue_pending *sp = NULL;
12291 /* Now can we send this? */
12292 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12293 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12294 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12295 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12296 /* got data while shutting down */
12297 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12298 *error = ECONNRESET;
12301 sctp_alloc_a_strmoq(stcb, sp);
12303 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12308 sp->sender_all_done = 0;
12309 sp->sinfo_flags = srcv->sinfo_flags;
12310 sp->timetolive = srcv->sinfo_timetolive;
12311 sp->ppid = srcv->sinfo_ppid;
12312 sp->context = srcv->sinfo_context;
12313 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12315 sp->stream = srcv->sinfo_stream;
12316 sp->length = min(uio->uio_resid, max_send_len);
12317 if ((sp->length == (uint32_t) uio->uio_resid) &&
12318 ((user_marks_eor == 0) ||
12319 (srcv->sinfo_flags & SCTP_EOF) ||
12320 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12321 sp->msg_is_complete = 1;
12323 sp->msg_is_complete = 0;
12325 sp->sender_all_done = 0;
12326 sp->some_taken = 0;
12327 sp->put_last_out = 0;
12328 resv_in_first = sizeof(struct sctp_data_chunk);
12329 sp->data = sp->tail_mbuf = NULL;
12330 if (sp->length == 0) {
12334 if (srcv->sinfo_keynumber_valid) {
12335 sp->auth_keyid = srcv->sinfo_keynumber;
12337 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12339 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12340 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12341 sp->holds_key_ref = 1;
12343 *error = sctp_copy_one(sp, uio, resv_in_first);
12346 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12349 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12351 atomic_add_int(&sp->net->ref_count, 1);
12355 sctp_set_prsctp_policy(sp);
12363 sctp_sosend(struct socket *so,
12364 struct sockaddr *addr,
12367 struct mbuf *control,
12372 int error, use_sndinfo = 0;
12373 struct sctp_sndrcvinfo sndrcvninfo;
12374 struct sockaddr *addr_to_use;
12376 #if defined(INET) && defined(INET6)
12377 struct sockaddr_in sin;
12382 /* process cmsg snd/rcv info (maybe a assoc-id) */
12383 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12384 sizeof(sndrcvninfo))) {
12389 addr_to_use = addr;
12390 #if defined(INET) && defined(INET6)
12391 if ((addr) && (addr->sa_family == AF_INET6)) {
12392 struct sockaddr_in6 *sin6;
12394 sin6 = (struct sockaddr_in6 *)addr;
12395 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12396 in6_sin6_2_sin(&sin, sin6);
12397 addr_to_use = (struct sockaddr *)&sin;
12401 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12404 use_sndinfo ? &sndrcvninfo : NULL
12412 sctp_lower_sosend(struct socket *so,
12413 struct sockaddr *addr,
12415 struct mbuf *i_pak,
12416 struct mbuf *control,
12418 struct sctp_sndrcvinfo *srcv
12423 unsigned int sndlen = 0, max_len;
12425 struct mbuf *top = NULL;
12426 int queue_only = 0, queue_only_for_init = 0;
12427 int free_cnt_applied = 0;
12429 int now_filled = 0;
12430 unsigned int inqueue_bytes = 0;
12431 struct sctp_block_entry be;
12432 struct sctp_inpcb *inp;
12433 struct sctp_tcb *stcb = NULL;
12434 struct timeval now;
12435 struct sctp_nets *net;
12436 struct sctp_association *asoc;
12437 struct sctp_inpcb *t_inp;
12438 int user_marks_eor;
12439 int create_lock_applied = 0;
12440 int nagle_applies = 0;
12441 int some_on_control = 0;
12442 int got_all_of_the_send = 0;
12443 int hold_tcblock = 0;
12444 int non_blocking = 0;
12445 uint32_t local_add_more, local_soresv = 0;
12447 uint16_t sinfo_flags;
12448 sctp_assoc_t sinfo_assoc_id;
12455 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12457 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12460 SCTP_RELEASE_PKT(i_pak);
12464 if ((uio == NULL) && (i_pak == NULL)) {
12465 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12468 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12469 atomic_add_int(&inp->total_sends, 1);
12471 if (uio->uio_resid < 0) {
12472 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12475 sndlen = uio->uio_resid;
12477 top = SCTP_HEADER_TO_CHAIN(i_pak);
12478 sndlen = SCTP_HEADER_LEN(i_pak);
12480 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12483 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12484 (inp->sctp_socket->so_qlimit)) {
12485 /* The listener can NOT send */
12486 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12491 * Pre-screen address, if one is given the sin-len
12492 * must be set correctly!
12495 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12497 switch (raddr->sa.sa_family) {
12500 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12501 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12505 port = raddr->sin.sin_port;
12510 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12511 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12515 port = raddr->sin6.sin6_port;
12519 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12520 error = EAFNOSUPPORT;
12527 sinfo_flags = srcv->sinfo_flags;
12528 sinfo_assoc_id = srcv->sinfo_assoc_id;
12529 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12530 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12531 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12535 if (srcv->sinfo_flags)
12536 SCTP_STAT_INCR(sctps_sends_with_flags);
12538 sinfo_flags = inp->def_send.sinfo_flags;
12539 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12541 if (sinfo_flags & SCTP_SENDALL) {
12542 /* its a sendall */
12543 error = sctp_sendall(inp, uio, top, srcv);
12547 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12548 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12552 /* now we must find the assoc */
12553 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12554 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12555 SCTP_INP_RLOCK(inp);
12556 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12558 SCTP_TCB_LOCK(stcb);
12561 SCTP_INP_RUNLOCK(inp);
12562 } else if (sinfo_assoc_id) {
12563 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12566 * Since we did not use findep we must
12567 * increment it, and if we don't find a tcb
12570 SCTP_INP_WLOCK(inp);
12571 SCTP_INP_INCR_REF(inp);
12572 SCTP_INP_WUNLOCK(inp);
12573 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12574 if (stcb == NULL) {
12575 SCTP_INP_WLOCK(inp);
12576 SCTP_INP_DECR_REF(inp);
12577 SCTP_INP_WUNLOCK(inp);
12582 if ((stcb == NULL) && (addr)) {
12583 /* Possible implicit send? */
12584 SCTP_ASOC_CREATE_LOCK(inp);
12585 create_lock_applied = 1;
12586 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12587 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12588 /* Should I really unlock ? */
12589 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12594 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12595 (addr->sa_family == AF_INET6)) {
12596 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12600 SCTP_INP_WLOCK(inp);
12601 SCTP_INP_INCR_REF(inp);
12602 SCTP_INP_WUNLOCK(inp);
12603 /* With the lock applied look again */
12604 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12605 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12606 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12608 if (stcb == NULL) {
12609 SCTP_INP_WLOCK(inp);
12610 SCTP_INP_DECR_REF(inp);
12611 SCTP_INP_WUNLOCK(inp);
12618 if (t_inp != inp) {
12619 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12624 if (stcb == NULL) {
12625 if (addr == NULL) {
12626 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12630 /* We must go ahead and start the INIT process */
12633 if ((sinfo_flags & SCTP_ABORT) ||
12634 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12636 * User asks to abort a non-existant assoc,
12637 * or EOF a non-existant assoc with no data
12639 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12643 /* get an asoc/stcb struct */
12644 vrf_id = inp->def_vrf_id;
12646 if (create_lock_applied == 0) {
12647 panic("Error, should hold create lock and I don't?");
12650 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12651 inp->sctp_ep.pre_open_stream_count,
12654 if (stcb == NULL) {
12655 /* Error is setup for us in the call */
12658 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12659 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12661 * Set the connected flag so we can queue
12664 soisconnecting(so);
12667 if (create_lock_applied) {
12668 SCTP_ASOC_CREATE_UNLOCK(inp);
12669 create_lock_applied = 0;
12671 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12674 * Turn on queue only flag to prevent data from
12678 asoc = &stcb->asoc;
12679 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12680 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12682 /* initialize authentication params for the assoc */
12683 sctp_initialize_auth_params(inp, stcb);
12686 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12687 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12688 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12694 /* out with the INIT */
12695 queue_only_for_init = 1;
12697 * we may want to dig in after this call and adjust the MTU
12698 * value. It defaulted to 1500 (constant) but the ro
12699 * structure may now have an update and thus we may need to
12700 * change it BEFORE we append the message.
12704 asoc = &stcb->asoc;
12706 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12707 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12709 net = sctp_findnet(stcb, addr);
12712 if ((net == NULL) ||
12713 ((port != 0) && (port != stcb->rport))) {
12714 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12719 if (stcb->asoc.alternate) {
12720 net = stcb->asoc.alternate;
12722 net = stcb->asoc.primary_destination;
12725 atomic_add_int(&stcb->total_sends, 1);
12726 /* Keep the stcb from being freed under our feet */
12727 atomic_add_int(&asoc->refcnt, 1);
12728 free_cnt_applied = 1;
12730 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12731 if (sndlen > asoc->smallest_mtu) {
12732 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12737 if (SCTP_SO_IS_NBIO(so)
12738 || (flags & MSG_NBIO)
12742 /* would we block? */
12743 if (non_blocking) {
12744 if (hold_tcblock == 0) {
12745 SCTP_TCB_LOCK(stcb);
12748 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12749 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12750 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12751 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12752 if (sndlen > SCTP_SB_LIMIT_SND(so))
12755 error = EWOULDBLOCK;
12758 stcb->asoc.sb_send_resv += sndlen;
12759 SCTP_TCB_UNLOCK(stcb);
12762 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12764 local_soresv = sndlen;
12765 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12766 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12767 error = ECONNRESET;
12770 if (create_lock_applied) {
12771 SCTP_ASOC_CREATE_UNLOCK(inp);
12772 create_lock_applied = 0;
12774 /* Is the stream no. valid? */
12775 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12776 /* Invalid stream number */
12777 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12781 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
12782 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
12784 * Can't queue any data while stream reset is underway.
12786 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
12791 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
12794 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12795 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12798 /* we are now done with all control */
12800 sctp_m_freem(control);
12803 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12804 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12805 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12806 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12807 if (srcv->sinfo_flags & SCTP_ABORT) {
12810 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12811 error = ECONNRESET;
12815 /* Ok, we will attempt a msgsnd :> */
12817 p->td_ru.ru_msgsnd++;
12819 /* Are we aborting? */
12820 if (srcv->sinfo_flags & SCTP_ABORT) {
12822 int tot_demand, tot_out = 0, max_out;
12824 SCTP_STAT_INCR(sctps_sends_with_abort);
12825 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12826 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12827 /* It has to be up before we abort */
12828 /* how big is the user initiated abort? */
12829 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12833 if (hold_tcblock) {
12834 SCTP_TCB_UNLOCK(stcb);
12838 struct mbuf *cntm = NULL;
12840 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12842 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12843 tot_out += SCTP_BUF_LEN(cntm);
12847 /* Must fit in a MTU */
12849 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12850 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12852 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12856 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12859 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12863 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12864 max_out -= sizeof(struct sctp_abort_msg);
12865 if (tot_out > max_out) {
12869 struct sctp_paramhdr *ph;
12871 /* now move forward the data pointer */
12872 ph = mtod(mm, struct sctp_paramhdr *);
12873 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12874 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12876 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12878 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12881 * Here if we can't get his data we
12882 * still abort we just don't get to
12883 * send the users note :-0
12890 SCTP_BUF_NEXT(mm) = top;
12894 if (hold_tcblock == 0) {
12895 SCTP_TCB_LOCK(stcb);
12897 atomic_add_int(&stcb->asoc.refcnt, -1);
12898 free_cnt_applied = 0;
12899 /* release this lock, otherwise we hang on ourselves */
12900 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12901 /* now relock the stcb so everything is sane */
12905 * In this case top is already chained to mm avoid double
12906 * free, since we free it below if top != NULL and driver
12907 * would free it after sending the packet out
12914 /* Calculate the maximum we can send */
12915 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12916 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12917 if (non_blocking) {
12918 /* we already checked for non-blocking above. */
12921 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12926 if (hold_tcblock) {
12927 SCTP_TCB_UNLOCK(stcb);
12930 if (asoc->strmout == NULL) {
12931 /* huh? software error */
12932 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12936 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12937 if ((user_marks_eor == 0) &&
12938 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12939 /* It will NEVER fit */
12940 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12944 if ((uio == NULL) && user_marks_eor) {
12946 * We do not support eeor mode for
12947 * sending with mbuf chains (like sendfile).
12949 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12953 if (user_marks_eor) {
12954 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12957 * For non-eeor the whole message must fit in
12958 * the socket send buffer.
12960 local_add_more = sndlen;
12963 if (non_blocking) {
12964 goto skip_preblock;
12966 if (((max_len <= local_add_more) &&
12967 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12969 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12970 /* No room right now ! */
12971 SOCKBUF_LOCK(&so->so_snd);
12972 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12973 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12974 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12975 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12976 (unsigned int)SCTP_SB_LIMIT_SND(so),
12979 stcb->asoc.stream_queue_cnt,
12980 stcb->asoc.chunks_on_out_queue,
12981 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12982 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12983 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12986 stcb->block_entry = &be;
12987 error = sbwait(&so->so_snd);
12988 stcb->block_entry = NULL;
12989 if (error || so->so_error || be.error) {
12992 error = so->so_error;
12997 SOCKBUF_UNLOCK(&so->so_snd);
13000 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13001 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13002 asoc, stcb->asoc.total_output_queue_size);
13004 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13007 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13009 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13010 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13014 SOCKBUF_UNLOCK(&so->so_snd);
13017 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13021 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13022 * case NOTE: uio will be null when top/mbuf is passed
13025 if (srcv->sinfo_flags & SCTP_EOF) {
13026 got_all_of_the_send = 1;
13029 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13035 struct sctp_stream_queue_pending *sp;
13036 struct sctp_stream_out *strm;
13039 SCTP_TCB_SEND_LOCK(stcb);
13040 if ((asoc->stream_locked) &&
13041 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13042 SCTP_TCB_SEND_UNLOCK(stcb);
13043 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13047 SCTP_TCB_SEND_UNLOCK(stcb);
13049 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13050 if (strm->last_msg_incomplete == 0) {
13052 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13053 if ((sp == NULL) || (error)) {
13056 SCTP_TCB_SEND_LOCK(stcb);
13057 if (sp->msg_is_complete) {
13058 strm->last_msg_incomplete = 0;
13059 asoc->stream_locked = 0;
13062 * Just got locked to this guy in case of an
13065 strm->last_msg_incomplete = 1;
13066 asoc->stream_locked = 1;
13067 asoc->stream_locked_on = srcv->sinfo_stream;
13068 sp->sender_all_done = 0;
13070 sctp_snd_sb_alloc(stcb, sp->length);
13071 atomic_add_int(&asoc->stream_queue_cnt, 1);
13072 if (srcv->sinfo_flags & SCTP_UNORDERED) {
13073 SCTP_STAT_INCR(sctps_sends_with_unord);
13075 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13076 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13077 SCTP_TCB_SEND_UNLOCK(stcb);
13079 SCTP_TCB_SEND_LOCK(stcb);
13080 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13081 SCTP_TCB_SEND_UNLOCK(stcb);
13083 /* ???? Huh ??? last msg is gone */
13085 panic("Warning: Last msg marked incomplete, yet nothing left?");
13087 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13088 strm->last_msg_incomplete = 0;
13094 while (uio->uio_resid > 0) {
13095 /* How much room do we have? */
13096 struct mbuf *new_tail, *mm;
13098 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13099 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13103 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13104 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13105 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13108 if (hold_tcblock) {
13109 SCTP_TCB_UNLOCK(stcb);
13112 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13113 if ((mm == NULL) || error) {
13119 /* Update the mbuf and count */
13120 SCTP_TCB_SEND_LOCK(stcb);
13121 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13123 * we need to get out. Peer probably
13127 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13128 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13129 error = ECONNRESET;
13131 SCTP_TCB_SEND_UNLOCK(stcb);
13134 if (sp->tail_mbuf) {
13135 /* tack it to the end */
13136 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13137 sp->tail_mbuf = new_tail;
13139 /* A stolen mbuf */
13141 sp->tail_mbuf = new_tail;
13143 sctp_snd_sb_alloc(stcb, sndout);
13144 atomic_add_int(&sp->length, sndout);
13147 /* Did we reach EOR? */
13148 if ((uio->uio_resid == 0) &&
13149 ((user_marks_eor == 0) ||
13150 (srcv->sinfo_flags & SCTP_EOF) ||
13151 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13152 sp->msg_is_complete = 1;
13154 sp->msg_is_complete = 0;
13156 SCTP_TCB_SEND_UNLOCK(stcb);
13158 if (uio->uio_resid == 0) {
13163 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
13165 * This is ugly but we must assure locking
13168 if (hold_tcblock == 0) {
13169 SCTP_TCB_LOCK(stcb);
13172 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13173 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13174 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13175 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13181 SCTP_TCB_UNLOCK(stcb);
13184 /* wait for space now */
13185 if (non_blocking) {
13186 /* Non-blocking io in place out */
13189 /* What about the INIT, send it maybe */
13190 if (queue_only_for_init) {
13191 if (hold_tcblock == 0) {
13192 SCTP_TCB_LOCK(stcb);
13195 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13196 /* a collision took us forward? */
13199 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13200 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13204 if ((net->flight_size > net->cwnd) &&
13205 (asoc->sctp_cmt_on_off == 0)) {
13206 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13208 } else if (asoc->ifp_had_enobuf) {
13209 SCTP_STAT_INCR(sctps_ifnomemqueued);
13210 if (net->flight_size > (2 * net->mtu)) {
13213 asoc->ifp_had_enobuf = 0;
13215 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13216 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13217 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13218 (stcb->asoc.total_flight > 0) &&
13219 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13220 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13223 * Ok, Nagle is set on and we have data outstanding.
13224 * Don't send anything and let SACKs drive out the
13225 * data unless we have a "full" segment to send.
13227 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13228 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13230 SCTP_STAT_INCR(sctps_naglequeued);
13233 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13234 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13235 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13237 SCTP_STAT_INCR(sctps_naglesent);
13240 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13242 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13243 nagle_applies, un_sent);
13244 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13245 stcb->asoc.total_flight,
13246 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13248 if (queue_only_for_init)
13249 queue_only_for_init = 0;
13250 if ((queue_only == 0) && (nagle_applies == 0)) {
13252 * need to start chunk output
13253 * before blocking.. note that if
13254 * a lock is already applied, then
13255 * the input via the net is happening
13256 * and I don't need to start output :-D
13258 if (hold_tcblock == 0) {
13259 if (SCTP_TCB_TRYLOCK(stcb)) {
13261 sctp_chunk_output(inp,
13263 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13266 sctp_chunk_output(inp,
13268 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13270 if (hold_tcblock == 1) {
13271 SCTP_TCB_UNLOCK(stcb);
13275 SOCKBUF_LOCK(&so->so_snd);
13277 * This is a bit strange, but I think it will
13278 * work. The total_output_queue_size is locked and
13279 * protected by the TCB_LOCK, which we just released.
13280 * There is a race that can occur between releasing it
13281 * above, and me getting the socket lock, where sacks
13282 * come in but we have not put the SB_WAIT on the
13283 * so_snd buffer to get the wakeup. After the LOCK
13284 * is applied the sack_processing will also need to
13285 * LOCK the so->so_snd to do the actual sowwakeup(). So
13286 * once we have the socket buffer lock if we recheck the
13287 * size we KNOW we will get to sleep safely with the
13288 * wakeup flag in place.
13290 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13291 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13292 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13293 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13294 asoc, uio->uio_resid);
13297 stcb->block_entry = &be;
13298 error = sbwait(&so->so_snd);
13299 stcb->block_entry = NULL;
13301 if (error || so->so_error || be.error) {
13304 error = so->so_error;
13309 SOCKBUF_UNLOCK(&so->so_snd);
13312 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13313 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13314 asoc, stcb->asoc.total_output_queue_size);
13317 SOCKBUF_UNLOCK(&so->so_snd);
13318 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13322 SCTP_TCB_SEND_LOCK(stcb);
13324 if (sp->msg_is_complete == 0) {
13325 strm->last_msg_incomplete = 1;
13326 asoc->stream_locked = 1;
13327 asoc->stream_locked_on = srcv->sinfo_stream;
13329 sp->sender_all_done = 1;
13330 strm->last_msg_incomplete = 0;
13331 asoc->stream_locked = 0;
13334 SCTP_PRINTF("Huh no sp TSNH?\n");
13335 strm->last_msg_incomplete = 0;
13336 asoc->stream_locked = 0;
13338 SCTP_TCB_SEND_UNLOCK(stcb);
13339 if (uio->uio_resid == 0) {
13340 got_all_of_the_send = 1;
13343 /* We send in a 0, since we do NOT have any locks */
13344 error = sctp_msg_append(stcb, net, top, srcv, 0);
13346 if (srcv->sinfo_flags & SCTP_EOF) {
13348 * This should only happen for Panda for the mbuf
13349 * send case, which does NOT yet support EEOR mode.
13350 * Thus, we can just set this flag to do the proper
13353 got_all_of_the_send = 1;
13361 if ((srcv->sinfo_flags & SCTP_EOF) &&
13362 (got_all_of_the_send == 1)) {
13365 SCTP_STAT_INCR(sctps_sends_with_eof);
13367 if (hold_tcblock == 0) {
13368 SCTP_TCB_LOCK(stcb);
13371 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13372 if (TAILQ_EMPTY(&asoc->send_queue) &&
13373 TAILQ_EMPTY(&asoc->sent_queue) &&
13375 if (asoc->locked_on_sending) {
13378 /* there is nothing queued to send, so I'm done... */
13379 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13380 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13381 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13382 struct sctp_nets *netp;
13384 /* only send SHUTDOWN the first time through */
13385 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13386 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13388 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13389 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13390 sctp_stop_timers_for_shutdown(stcb);
13391 if (stcb->asoc.alternate) {
13392 netp = stcb->asoc.alternate;
13394 netp = stcb->asoc.primary_destination;
13396 sctp_send_shutdown(stcb, netp);
13397 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13399 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13400 asoc->primary_destination);
13404 * we still got (or just got) data to send, so set
13408 * XXX sockets draft says that SCTP_EOF should be
13409 * sent with no data. currently, we will allow user
13410 * data to be sent first and move to
13413 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13414 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13415 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13416 if (hold_tcblock == 0) {
13417 SCTP_TCB_LOCK(stcb);
13420 if (asoc->locked_on_sending) {
13421 /* Locked to send out the data */
13422 struct sctp_stream_queue_pending *sp;
13424 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13426 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13427 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13430 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13431 if (TAILQ_EMPTY(&asoc->send_queue) &&
13432 TAILQ_EMPTY(&asoc->sent_queue) &&
13433 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13434 struct mbuf *op_err;
13435 char msg[SCTP_DIAG_INFO_LEN];
13438 if (free_cnt_applied) {
13439 atomic_add_int(&stcb->asoc.refcnt, -1);
13440 free_cnt_applied = 0;
13442 snprintf(msg, sizeof(msg),
13443 "%s:%d at %s", __FILE__, __LINE__, __func__);
13444 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
13446 sctp_abort_an_association(stcb->sctp_ep, stcb,
13447 op_err, SCTP_SO_LOCKED);
13449 * now relock the stcb so everything
13456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13457 asoc->primary_destination);
13458 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13463 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13464 some_on_control = 1;
13466 if (queue_only_for_init) {
13467 if (hold_tcblock == 0) {
13468 SCTP_TCB_LOCK(stcb);
13471 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13472 /* a collision took us forward? */
13475 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13476 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13480 if ((net->flight_size > net->cwnd) &&
13481 (stcb->asoc.sctp_cmt_on_off == 0)) {
13482 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13484 } else if (asoc->ifp_had_enobuf) {
13485 SCTP_STAT_INCR(sctps_ifnomemqueued);
13486 if (net->flight_size > (2 * net->mtu)) {
13489 asoc->ifp_had_enobuf = 0;
13491 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13492 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13493 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13494 (stcb->asoc.total_flight > 0) &&
13495 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13496 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13498 * Ok, Nagle is set on and we have data outstanding.
13499 * Don't send anything and let SACKs drive out the
13500 * data unless wen have a "full" segment to send.
13502 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13503 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13505 SCTP_STAT_INCR(sctps_naglequeued);
13508 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13509 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13510 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13512 SCTP_STAT_INCR(sctps_naglesent);
13515 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13516 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13517 nagle_applies, un_sent);
13518 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13519 stcb->asoc.total_flight,
13520 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13522 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13523 /* we can attempt to send too. */
13524 if (hold_tcblock == 0) {
13526 * If there is activity recv'ing sacks no need to
13529 if (SCTP_TCB_TRYLOCK(stcb)) {
13530 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13534 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13536 } else if ((queue_only == 0) &&
13537 (stcb->asoc.peers_rwnd == 0) &&
13538 (stcb->asoc.total_flight == 0)) {
13539 /* We get to have a probe outstanding */
13540 if (hold_tcblock == 0) {
13542 SCTP_TCB_LOCK(stcb);
13544 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13545 } else if (some_on_control) {
13546 int num_out, reason, frag_point;
13548 /* Here we do control only */
13549 if (hold_tcblock == 0) {
13551 SCTP_TCB_LOCK(stcb);
13553 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13554 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13555 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13557 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13558 queue_only, stcb->asoc.peers_rwnd, un_sent,
13559 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13560 stcb->asoc.total_output_queue_size, error);
13565 if (local_soresv && stcb) {
13566 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13568 if (create_lock_applied) {
13569 SCTP_ASOC_CREATE_UNLOCK(inp);
13571 if ((stcb) && hold_tcblock) {
13572 SCTP_TCB_UNLOCK(stcb);
13574 if (stcb && free_cnt_applied) {
13575 atomic_add_int(&stcb->asoc.refcnt, -1);
13579 if (mtx_owned(&stcb->tcb_mtx)) {
13580 panic("Leaving with tcb mtx owned?");
13582 if (mtx_owned(&stcb->tcb_send_mtx)) {
13583 panic("Leaving with tcb send mtx owned?");
13591 sctp_m_freem(control);
13598 * generate an AUTHentication chunk, if required
13601 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13602 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13603 struct sctp_tcb *stcb, uint8_t chunk)
13605 struct mbuf *m_auth;
13606 struct sctp_auth_chunk *auth;
13610 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13614 if (stcb->asoc.auth_supported == 0) {
13617 /* does the requested chunk require auth? */
13618 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13621 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13622 if (m_auth == NULL) {
13626 /* reserve some space if this will be the first mbuf */
13628 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13629 /* fill in the AUTH chunk details */
13630 auth = mtod(m_auth, struct sctp_auth_chunk *);
13631 bzero(auth, sizeof(*auth));
13632 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13633 auth->ch.chunk_flags = 0;
13634 chunk_len = sizeof(*auth) +
13635 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13636 auth->ch.chunk_length = htons(chunk_len);
13637 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13638 /* key id and hmac digest will be computed and filled in upon send */
13640 /* save the offset where the auth was inserted into the chain */
13642 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13643 *offset += SCTP_BUF_LEN(cn);
13646 /* update length and return pointer to the auth chunk */
13647 SCTP_BUF_LEN(m_auth) = chunk_len;
13648 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13649 if (auth_ret != NULL)
13657 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13659 struct nd_prefix *pfx = NULL;
13660 struct nd_pfxrouter *pfxrtr = NULL;
13661 struct sockaddr_in6 gw6;
13663 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13666 /* get prefix entry of address */
13667 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13668 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13670 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13671 &src6->sin6_addr, &pfx->ndpr_mask))
13674 /* no prefix entry in the prefix list */
13676 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13677 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13680 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13681 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13683 /* search installed gateway from prefix entry */
13684 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13685 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13686 gw6.sin6_family = AF_INET6;
13687 gw6.sin6_len = sizeof(struct sockaddr_in6);
13688 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13689 sizeof(struct in6_addr));
13690 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13691 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13692 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13693 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13694 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13695 ro->ro_rt->rt_gateway)) {
13696 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13700 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13707 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13710 struct sockaddr_in *sin, *mask;
13711 struct ifaddr *ifa;
13712 struct in_addr srcnetaddr, gwnetaddr;
13714 if (ro == NULL || ro->ro_rt == NULL ||
13715 sifa->address.sa.sa_family != AF_INET) {
13718 ifa = (struct ifaddr *)sifa->ifa;
13719 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13720 sin = &sifa->address.sin;
13721 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13722 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13723 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13724 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13726 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13727 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13728 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13729 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13730 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13731 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {