2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, 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 /* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_pcb.h>
44 #include <netinet/sctputil.h>
45 #include <netinet/sctp_output.h>
46 #include <netinet/sctp_uio.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
49 #include <netinet/sctp_timer.h>
50 #include <netinet/sctp_asconf.h>
51 #include <netinet/sctp_indata.h>
52 #include <netinet/sctp_bsd_addr.h>
53 #include <netinet/sctp_input.h>
54 #include <netinet/sctp_crc32.h>
55 #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 int ipv4_addr_legal,
1869 int ipv6_addr_legal,
1871 int ipv4_local_scope,
1872 int local_scope SCTP_UNUSED,/* XXX */
1876 if ((loopback_scope == 0) &&
1877 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1879 * skip loopback if not in scope *
1883 switch (ifa->address.sa.sa_family) {
1886 if (ipv4_addr_legal) {
1887 struct sockaddr_in *sin;
1889 sin = (struct sockaddr_in *)&ifa->address.sin;
1890 if (sin->sin_addr.s_addr == 0) {
1891 /* not in scope , unspecified */
1894 if ((ipv4_local_scope == 0) &&
1895 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1896 /* private address not in scope */
1906 if (ipv6_addr_legal) {
1907 struct sockaddr_in6 *sin6;
1910 * Must update the flags, bummer, which means any
1911 * IFA locks must now be applied HERE <->
1914 sctp_gather_internal_ifa_flags(ifa);
1916 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1919 /* ok to use deprecated addresses? */
1920 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
1921 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1922 /* skip unspecifed addresses */
1925 if ( /* (local_scope == 0) && */
1926 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1929 if ((site_scope == 0) &&
1930 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1944 static struct mbuf *
1945 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa)
1947 struct sctp_paramhdr *parmh;
1951 switch (ifa->address.sa.sa_family) {
1954 len = sizeof(struct sctp_ipv4addr_param);
1959 len = sizeof(struct sctp_ipv6addr_param);
1965 if (M_TRAILINGSPACE(m) >= len) {
1966 /* easy side we just drop it on the end */
1967 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1970 /* Need more space */
1972 while (SCTP_BUF_NEXT(mret) != NULL) {
1973 mret = SCTP_BUF_NEXT(mret);
1975 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(len, 0, M_DONTWAIT, 1, MT_DATA);
1976 if (SCTP_BUF_NEXT(mret) == NULL) {
1977 /* We are hosed, can't add more addresses */
1980 mret = SCTP_BUF_NEXT(mret);
1981 parmh = mtod(mret, struct sctp_paramhdr *);
1983 /* now add the parameter */
1984 switch (ifa->address.sa.sa_family) {
1988 struct sctp_ipv4addr_param *ipv4p;
1989 struct sockaddr_in *sin;
1991 sin = (struct sockaddr_in *)&ifa->address.sin;
1992 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1993 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1994 parmh->param_length = htons(len);
1995 ipv4p->addr = sin->sin_addr.s_addr;
1996 SCTP_BUF_LEN(mret) += len;
2003 struct sctp_ipv6addr_param *ipv6p;
2004 struct sockaddr_in6 *sin6;
2006 sin6 = (struct sockaddr_in6 *)&ifa->address.sin6;
2007 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2008 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2009 parmh->param_length = htons(len);
2010 memcpy(ipv6p->addr, &sin6->sin6_addr,
2011 sizeof(ipv6p->addr));
2012 /* clear embedded scope in the address */
2013 in6_clearscope((struct in6_addr *)ipv6p->addr);
2014 SCTP_BUF_LEN(mret) += len;
2026 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2027 struct sctp_scoping *scope,
2028 struct mbuf *m_at, int cnt_inits_to)
2030 struct sctp_vrf *vrf = NULL;
2031 int cnt, limit_out = 0, total_count;
2034 vrf_id = inp->def_vrf_id;
2035 SCTP_IPI_ADDR_RLOCK();
2036 vrf = sctp_find_vrf(vrf_id);
2038 SCTP_IPI_ADDR_RUNLOCK();
2041 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2042 struct sctp_ifa *sctp_ifap;
2043 struct sctp_ifn *sctp_ifnp;
2046 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2048 cnt = SCTP_ADDRESS_LIMIT;
2051 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2052 if ((scope->loopback_scope == 0) &&
2053 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2055 * Skip loopback devices if loopback_scope
2060 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2061 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2064 if (sctp_is_address_in_scope(sctp_ifap,
2065 scope->ipv4_addr_legal,
2066 scope->ipv6_addr_legal,
2067 scope->loopback_scope,
2068 scope->ipv4_local_scope,
2070 scope->site_scope, 1) == 0) {
2074 if (cnt > SCTP_ADDRESS_LIMIT) {
2078 if (cnt > SCTP_ADDRESS_LIMIT) {
2085 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2087 if ((scope->loopback_scope == 0) &&
2088 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2090 * Skip loopback devices if
2091 * loopback_scope not set
2095 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2096 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2099 if (sctp_is_address_in_scope(sctp_ifap,
2100 scope->ipv4_addr_legal,
2101 scope->ipv6_addr_legal,
2102 scope->loopback_scope,
2103 scope->ipv4_local_scope,
2105 scope->site_scope, 0) == 0) {
2108 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap);
2119 if (total_count > SCTP_ADDRESS_LIMIT) {
2120 /* No more addresses */
2128 struct sctp_laddr *laddr;
2131 /* First, how many ? */
2132 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2133 if (laddr->ifa == NULL) {
2136 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2138 * Address being deleted by the system, dont
2142 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2144 * Address being deleted on this ep don't
2149 if (sctp_is_address_in_scope(laddr->ifa,
2150 scope->ipv4_addr_legal,
2151 scope->ipv6_addr_legal,
2152 scope->loopback_scope,
2153 scope->ipv4_local_scope,
2155 scope->site_scope, 1) == 0) {
2161 * To get through a NAT we only list addresses if we have
2162 * more than one. That way if you just bind a single address
2163 * we let the source of the init dictate our address.
2167 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2168 if (laddr->ifa == NULL) {
2171 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2174 if (sctp_is_address_in_scope(laddr->ifa,
2175 scope->ipv4_addr_legal,
2176 scope->ipv6_addr_legal,
2177 scope->loopback_scope,
2178 scope->ipv4_local_scope,
2180 scope->site_scope, 0) == 0) {
2183 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa);
2185 if (cnt >= SCTP_ADDRESS_LIMIT) {
2191 SCTP_IPI_ADDR_RUNLOCK();
2195 static struct sctp_ifa *
2196 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2197 uint8_t dest_is_loop,
2198 uint8_t dest_is_priv,
2201 uint8_t dest_is_global = 0;
2203 /* dest_is_priv is true if destination is a private address */
2204 /* dest_is_loop is true if destination is a loopback addresses */
2207 * Here we determine if its a preferred address. A preferred address
2208 * means it is the same scope or higher scope then the destination.
2209 * L = loopback, P = private, G = global
2210 * -----------------------------------------
2211 * src | dest | result
2212 * ----------------------------------------
2214 * -----------------------------------------
2215 * P | L | yes-v4 no-v6
2216 * -----------------------------------------
2217 * G | L | yes-v4 no-v6
2218 * -----------------------------------------
2220 * -----------------------------------------
2222 * -----------------------------------------
2224 * -----------------------------------------
2226 * -----------------------------------------
2228 * -----------------------------------------
2230 * -----------------------------------------
2233 if (ifa->address.sa.sa_family != fam) {
2234 /* forget mis-matched family */
2237 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2240 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2241 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2242 /* Ok the address may be ok */
2244 if (fam == AF_INET6) {
2245 /* ok to use deprecated addresses? no lets not! */
2246 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2247 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2250 if (ifa->src_is_priv && !ifa->src_is_loop) {
2252 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2256 if (ifa->src_is_glob) {
2258 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2265 * Now that we know what is what, implement or table this could in
2266 * theory be done slicker (it used to be), but this is
2267 * straightforward and easier to validate :-)
2269 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2270 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2271 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2272 dest_is_loop, dest_is_priv, dest_is_global);
2274 if ((ifa->src_is_loop) && (dest_is_priv)) {
2275 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2278 if ((ifa->src_is_glob) && (dest_is_priv)) {
2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2282 if ((ifa->src_is_loop) && (dest_is_global)) {
2283 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2286 if ((ifa->src_is_priv) && (dest_is_global)) {
2287 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2290 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2291 /* its a preferred address */
2295 static struct sctp_ifa *
2296 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2297 uint8_t dest_is_loop,
2298 uint8_t dest_is_priv,
2301 uint8_t dest_is_global = 0;
2304 * Here we determine if its a acceptable address. A acceptable
2305 * address means it is the same scope or higher scope but we can
2306 * allow for NAT which means its ok to have a global dest and a
2309 * L = loopback, P = private, G = global
2310 * -----------------------------------------
2311 * src | dest | result
2312 * -----------------------------------------
2314 * -----------------------------------------
2315 * P | L | yes-v4 no-v6
2316 * -----------------------------------------
2318 * -----------------------------------------
2320 * -----------------------------------------
2322 * -----------------------------------------
2323 * G | P | yes - May not work
2324 * -----------------------------------------
2326 * -----------------------------------------
2327 * P | G | yes - May not work
2328 * -----------------------------------------
2330 * -----------------------------------------
2333 if (ifa->address.sa.sa_family != fam) {
2334 /* forget non matching family */
2335 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2336 ifa->address.sa.sa_family, fam);
2339 /* Ok the address may be ok */
2340 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2341 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2342 dest_is_loop, dest_is_priv);
2343 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2347 if (fam == AF_INET6) {
2348 /* ok to use deprecated addresses? */
2349 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2352 if (ifa->src_is_priv) {
2353 /* Special case, linklocal to loop */
2360 * Now that we know what is what, implement our table. This could in
2361 * theory be done slicker (it used to be), but this is
2362 * straightforward and easier to validate :-)
2364 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2367 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2370 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2373 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2376 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2377 /* its an acceptable address */
2382 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2384 struct sctp_laddr *laddr;
2387 /* There are no restrictions, no TCB :-) */
2390 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2391 if (laddr->ifa == NULL) {
2392 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2396 if (laddr->ifa == ifa) {
2397 /* Yes it is on the list */
2406 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2408 struct sctp_laddr *laddr;
2412 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2413 if (laddr->ifa == NULL) {
2414 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2418 if ((laddr->ifa == ifa) && laddr->action == 0)
2427 static struct sctp_ifa *
2428 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2431 int non_asoc_addr_ok,
2432 uint8_t dest_is_priv,
2433 uint8_t dest_is_loop,
2436 struct sctp_laddr *laddr, *starting_point;
2439 struct sctp_ifn *sctp_ifn;
2440 struct sctp_ifa *sctp_ifa, *sifa;
2441 struct sctp_vrf *vrf;
2444 vrf = sctp_find_vrf(vrf_id);
2448 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2449 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2450 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2452 * first question, is the ifn we will emit on in our list, if so, we
2453 * want such an address. Note that we first looked for a preferred
2457 /* is a preferred one on the interface we route out? */
2458 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2459 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2460 (non_asoc_addr_ok == 0))
2462 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2467 if (sctp_is_addr_in_ep(inp, sifa)) {
2468 atomic_add_int(&sifa->refcount, 1);
2474 * ok, now we now need to find one on the list of the addresses. We
2475 * can't get one on the emitting interface so let's find first a
2476 * preferred one. If not that an acceptable one otherwise... we
2479 starting_point = inp->next_addr_touse;
2481 if (inp->next_addr_touse == NULL) {
2482 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2485 for (laddr = inp->next_addr_touse; laddr;
2486 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2487 if (laddr->ifa == NULL) {
2488 /* address has been removed */
2491 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2492 /* address is being deleted */
2495 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2499 atomic_add_int(&sifa->refcount, 1);
2502 if (resettotop == 0) {
2503 inp->next_addr_touse = NULL;
2506 inp->next_addr_touse = starting_point;
2509 if (inp->next_addr_touse == NULL) {
2510 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2513 /* ok, what about an acceptable address in the inp */
2514 for (laddr = inp->next_addr_touse; laddr;
2515 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2516 if (laddr->ifa == NULL) {
2517 /* address has been removed */
2520 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2521 /* address is being deleted */
2524 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2528 atomic_add_int(&sifa->refcount, 1);
2531 if (resettotop == 0) {
2532 inp->next_addr_touse = NULL;
2533 goto once_again_too;
2536 * no address bound can be a source for the destination we are in
2544 static struct sctp_ifa *
2545 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2546 struct sctp_tcb *stcb,
2549 uint8_t dest_is_priv,
2550 uint8_t dest_is_loop,
2551 int non_asoc_addr_ok,
2554 struct sctp_laddr *laddr, *starting_point;
2556 struct sctp_ifn *sctp_ifn;
2557 struct sctp_ifa *sctp_ifa, *sifa;
2558 uint8_t start_at_beginning = 0;
2559 struct sctp_vrf *vrf;
2563 * first question, is the ifn we will emit on in our list, if so, we
2566 vrf = sctp_find_vrf(vrf_id);
2570 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2571 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2572 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2575 * first question, is the ifn we will emit on in our list? If so,
2576 * we want that one. First we look for a preferred. Second, we go
2577 * for an acceptable.
2580 /* first try for a preferred address on the ep */
2581 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2582 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2584 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2585 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2588 if (((non_asoc_addr_ok == 0) &&
2589 (sctp_is_addr_restricted(stcb, sifa))) ||
2590 (non_asoc_addr_ok &&
2591 (sctp_is_addr_restricted(stcb, sifa)) &&
2592 (!sctp_is_addr_pending(stcb, sifa)))) {
2593 /* on the no-no list */
2596 atomic_add_int(&sifa->refcount, 1);
2600 /* next try for an acceptable address on the ep */
2601 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2602 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2604 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2605 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2608 if (((non_asoc_addr_ok == 0) &&
2609 (sctp_is_addr_restricted(stcb, sifa))) ||
2610 (non_asoc_addr_ok &&
2611 (sctp_is_addr_restricted(stcb, sifa)) &&
2612 (!sctp_is_addr_pending(stcb, sifa)))) {
2613 /* on the no-no list */
2616 atomic_add_int(&sifa->refcount, 1);
2623 * if we can't find one like that then we must look at all addresses
2624 * bound to pick one at first preferable then secondly acceptable.
2626 starting_point = stcb->asoc.last_used_address;
2628 if (stcb->asoc.last_used_address == NULL) {
2629 start_at_beginning = 1;
2630 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2632 /* search beginning with the last used address */
2633 for (laddr = stcb->asoc.last_used_address; laddr;
2634 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2635 if (laddr->ifa == NULL) {
2636 /* address has been removed */
2639 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2640 /* address is being deleted */
2643 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2646 if (((non_asoc_addr_ok == 0) &&
2647 (sctp_is_addr_restricted(stcb, sifa))) ||
2648 (non_asoc_addr_ok &&
2649 (sctp_is_addr_restricted(stcb, sifa)) &&
2650 (!sctp_is_addr_pending(stcb, sifa)))) {
2651 /* on the no-no list */
2654 stcb->asoc.last_used_address = laddr;
2655 atomic_add_int(&sifa->refcount, 1);
2658 if (start_at_beginning == 0) {
2659 stcb->asoc.last_used_address = NULL;
2660 goto sctp_from_the_top;
2662 /* now try for any higher scope than the destination */
2663 stcb->asoc.last_used_address = starting_point;
2664 start_at_beginning = 0;
2666 if (stcb->asoc.last_used_address == NULL) {
2667 start_at_beginning = 1;
2668 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2670 /* search beginning with the last used address */
2671 for (laddr = stcb->asoc.last_used_address; laddr;
2672 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2673 if (laddr->ifa == NULL) {
2674 /* address has been removed */
2677 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2678 /* address is being deleted */
2681 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2685 if (((non_asoc_addr_ok == 0) &&
2686 (sctp_is_addr_restricted(stcb, sifa))) ||
2687 (non_asoc_addr_ok &&
2688 (sctp_is_addr_restricted(stcb, sifa)) &&
2689 (!sctp_is_addr_pending(stcb, sifa)))) {
2690 /* on the no-no list */
2693 stcb->asoc.last_used_address = laddr;
2694 atomic_add_int(&sifa->refcount, 1);
2697 if (start_at_beginning == 0) {
2698 stcb->asoc.last_used_address = NULL;
2699 goto sctp_from_the_top2;
2704 static struct sctp_ifa *
2705 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2706 struct sctp_tcb *stcb,
2707 int non_asoc_addr_ok,
2708 uint8_t dest_is_loop,
2709 uint8_t dest_is_priv,
2715 struct sctp_ifa *ifa, *sifa;
2716 int num_eligible_addr = 0;
2719 struct sockaddr_in6 sin6, lsa6;
2721 if (fam == AF_INET6) {
2722 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2723 (void)sa6_recoverscope(&sin6);
2726 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2727 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2728 (non_asoc_addr_ok == 0))
2730 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2735 if (fam == AF_INET6 &&
2737 sifa->src_is_loop && sifa->src_is_priv) {
2739 * don't allow fe80::1 to be a src on loop ::1, we
2740 * don't list it to the peer so we will get an
2745 if (fam == AF_INET6 &&
2746 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2747 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2749 * link-local <-> link-local must belong to the same
2752 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2753 (void)sa6_recoverscope(&lsa6);
2754 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2761 * Check if the IPv6 address matches to next-hop. In the
2762 * mobile case, old IPv6 address may be not deleted from the
2763 * interface. Then, the interface has previous and new
2764 * addresses. We should use one corresponding to the
2765 * next-hop. (by micchie)
2768 if (stcb && fam == AF_INET6 &&
2769 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2770 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2777 /* Avoid topologically incorrect IPv4 address */
2778 if (stcb && fam == AF_INET &&
2779 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2780 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2786 if (sctp_is_address_in_scope(ifa,
2787 stcb->asoc.ipv4_addr_legal,
2788 stcb->asoc.ipv6_addr_legal,
2789 stcb->asoc.loopback_scope,
2790 stcb->asoc.ipv4_local_scope,
2791 stcb->asoc.local_scope,
2792 stcb->asoc.site_scope, 0) == 0) {
2795 if (((non_asoc_addr_ok == 0) &&
2796 (sctp_is_addr_restricted(stcb, sifa))) ||
2797 (non_asoc_addr_ok &&
2798 (sctp_is_addr_restricted(stcb, sifa)) &&
2799 (!sctp_is_addr_pending(stcb, sifa)))) {
2801 * It is restricted for some reason..
2802 * probably not yet added.
2807 if (num_eligible_addr >= addr_wanted) {
2810 num_eligible_addr++;
2817 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2818 struct sctp_tcb *stcb,
2819 int non_asoc_addr_ok,
2820 uint8_t dest_is_loop,
2821 uint8_t dest_is_priv,
2824 struct sctp_ifa *ifa, *sifa;
2825 int num_eligible_addr = 0;
2827 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2828 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2829 (non_asoc_addr_ok == 0)) {
2832 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2838 if (sctp_is_address_in_scope(ifa,
2839 stcb->asoc.ipv4_addr_legal,
2840 stcb->asoc.ipv6_addr_legal,
2841 stcb->asoc.loopback_scope,
2842 stcb->asoc.ipv4_local_scope,
2843 stcb->asoc.local_scope,
2844 stcb->asoc.site_scope, 0) == 0) {
2847 if (((non_asoc_addr_ok == 0) &&
2848 (sctp_is_addr_restricted(stcb, sifa))) ||
2849 (non_asoc_addr_ok &&
2850 (sctp_is_addr_restricted(stcb, sifa)) &&
2851 (!sctp_is_addr_pending(stcb, sifa)))) {
2853 * It is restricted for some reason..
2854 * probably not yet added.
2859 num_eligible_addr++;
2861 return (num_eligible_addr);
2864 static struct sctp_ifa *
2865 sctp_choose_boundall(struct sctp_tcb *stcb,
2866 struct sctp_nets *net,
2869 uint8_t dest_is_priv,
2870 uint8_t dest_is_loop,
2871 int non_asoc_addr_ok,
2874 int cur_addr_num = 0, num_preferred = 0;
2876 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2877 struct sctp_ifa *sctp_ifa, *sifa;
2879 struct sctp_vrf *vrf;
2887 * For boundall we can use any address in the association.
2888 * If non_asoc_addr_ok is set we can use any address (at least in
2889 * theory). So we look for preferred addresses first. If we find one,
2890 * we use it. Otherwise we next try to get an address on the
2891 * interface, which we should be able to do (unless non_asoc_addr_ok
2892 * is false and we are routed out that way). In these cases where we
2893 * can't use the address of the interface we go through all the
2894 * ifn's looking for an address we can use and fill that in. Punting
2895 * means we send back address 0, which will probably cause problems
2896 * actually since then IP will fill in the address of the route ifn,
2897 * which means we probably already rejected it.. i.e. here comes an
2900 vrf = sctp_find_vrf(vrf_id);
2904 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2905 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2906 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2907 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2908 if (sctp_ifn == NULL) {
2909 /* ?? We don't have this guy ?? */
2910 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
2911 goto bound_all_plan_b;
2913 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
2914 ifn_index, sctp_ifn->ifn_name);
2917 cur_addr_num = net->indx_of_eligible_next_to_use;
2919 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
2924 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
2925 num_preferred, sctp_ifn->ifn_name);
2926 if (num_preferred == 0) {
2928 * no eligible addresses, we must use some other interface
2929 * address if we can find one.
2931 goto bound_all_plan_b;
2934 * Ok we have num_eligible_addr set with how many we can use, this
2935 * may vary from call to call due to addresses being deprecated
2938 if (cur_addr_num >= num_preferred) {
2942 * select the nth address from the list (where cur_addr_num is the
2943 * nth) and 0 is the first one, 1 is the second one etc...
2945 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
2947 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
2948 dest_is_priv, cur_addr_num, fam, ro);
2950 /* if sctp_ifa is NULL something changed??, fall to plan b. */
2952 atomic_add_int(&sctp_ifa->refcount, 1);
2954 /* save off where the next one we will want */
2955 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
2960 * plan_b: Look at all interfaces and find a preferred address. If
2961 * no preferred fall through to plan_c.
2964 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
2965 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
2966 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
2967 sctp_ifn->ifn_name);
2968 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
2969 /* wrong base scope */
2970 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
2973 if ((sctp_ifn == looked_at) && looked_at) {
2974 /* already looked at this guy */
2975 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
2978 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, stcb, non_asoc_addr_ok,
2979 dest_is_loop, dest_is_priv, fam);
2980 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2981 "Found ifn:%p %d preferred source addresses\n",
2982 ifn, num_preferred);
2983 if (num_preferred == 0) {
2984 /* None on this interface. */
2985 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
2988 SCTPDBG(SCTP_DEBUG_OUTPUT2,
2989 "num preferred:%d on interface:%p cur_addr_num:%d\n",
2990 num_preferred, sctp_ifn, cur_addr_num);
2993 * Ok we have num_eligible_addr set with how many we can
2994 * use, this may vary from call to call due to addresses
2995 * being deprecated etc..
2997 if (cur_addr_num >= num_preferred) {
3000 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, stcb, non_asoc_addr_ok, dest_is_loop,
3001 dest_is_priv, cur_addr_num, fam, ro);
3005 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3006 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3008 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3009 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3010 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3011 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3013 atomic_add_int(&sifa->refcount, 1);
3017 again_with_private_addresses_allowed:
3019 /* plan_c: do we have an acceptable address on the emit interface */
3021 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3022 if (emit_ifn == NULL) {
3023 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3026 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3027 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", sctp_ifa);
3028 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3029 (non_asoc_addr_ok == 0)) {
3030 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3033 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3036 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3040 if (sctp_is_address_in_scope(sifa,
3041 stcb->asoc.ipv4_addr_legal,
3042 stcb->asoc.ipv6_addr_legal,
3043 stcb->asoc.loopback_scope,
3044 stcb->asoc.ipv4_local_scope,
3045 stcb->asoc.local_scope,
3046 stcb->asoc.site_scope, 0) == 0) {
3047 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3051 if (((non_asoc_addr_ok == 0) &&
3052 (sctp_is_addr_restricted(stcb, sifa))) ||
3053 (non_asoc_addr_ok &&
3054 (sctp_is_addr_restricted(stcb, sifa)) &&
3055 (!sctp_is_addr_pending(stcb, sifa)))) {
3057 * It is restricted for some reason..
3058 * probably not yet added.
3060 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3065 printf("Stcb is null - no print\n");
3067 atomic_add_int(&sifa->refcount, 1);
3072 * plan_d: We are in trouble. No preferred address on the emit
3073 * interface. And not even a preferred address on all interfaces. Go
3074 * out and see if we can find an acceptable address somewhere
3075 * amongst all interfaces.
3077 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", looked_at);
3078 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3079 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3080 /* wrong base scope */
3083 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3084 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3085 (non_asoc_addr_ok == 0))
3087 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3093 if (sctp_is_address_in_scope(sifa,
3094 stcb->asoc.ipv4_addr_legal,
3095 stcb->asoc.ipv6_addr_legal,
3096 stcb->asoc.loopback_scope,
3097 stcb->asoc.ipv4_local_scope,
3098 stcb->asoc.local_scope,
3099 stcb->asoc.site_scope, 0) == 0) {
3103 if (((non_asoc_addr_ok == 0) &&
3104 (sctp_is_addr_restricted(stcb, sifa))) ||
3105 (non_asoc_addr_ok &&
3106 (sctp_is_addr_restricted(stcb, sifa)) &&
3107 (!sctp_is_addr_pending(stcb, sifa)))) {
3109 * It is restricted for some
3110 * reason.. probably not yet added.
3120 if ((retried == 0) && (stcb->asoc.ipv4_local_scope == 0)) {
3121 stcb->asoc.ipv4_local_scope = 1;
3123 goto again_with_private_addresses_allowed;
3124 } else if (retried == 1) {
3125 stcb->asoc.ipv4_local_scope = 0;
3132 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3133 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3134 /* wrong base scope */
3137 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3138 struct sctp_ifa *tmp_sifa;
3140 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3141 (non_asoc_addr_ok == 0))
3143 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3146 if (tmp_sifa == NULL) {
3149 if (tmp_sifa == sifa) {
3153 if (sctp_is_address_in_scope(tmp_sifa,
3154 stcb->asoc.ipv4_addr_legal,
3155 stcb->asoc.ipv6_addr_legal,
3156 stcb->asoc.loopback_scope,
3157 stcb->asoc.ipv4_local_scope,
3158 stcb->asoc.local_scope,
3159 stcb->asoc.site_scope, 0) == 0) {
3162 if (((non_asoc_addr_ok == 0) &&
3163 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3164 (non_asoc_addr_ok &&
3165 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3166 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3176 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3177 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3178 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3183 atomic_add_int(&sifa->refcount, 1);
3191 /* tcb may be NULL */
3193 sctp_source_address_selection(struct sctp_inpcb *inp,
3194 struct sctp_tcb *stcb,
3196 struct sctp_nets *net,
3197 int non_asoc_addr_ok, uint32_t vrf_id)
3199 struct sctp_ifa *answer;
3200 uint8_t dest_is_priv, dest_is_loop;
3204 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3208 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3213 * Rules: - Find the route if needed, cache if I can. - Look at
3214 * interface address in route, Is it in the bound list. If so we
3215 * have the best source. - If not we must rotate amongst the
3220 * Do we need to pay attention to scope. We can have a private address
3221 * or a global address we are sourcing or sending to. So if we draw
3223 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3225 * ------------------------------------------
3226 * source * dest * result
3227 * -----------------------------------------
3228 * <a> Private * Global * NAT
3229 * -----------------------------------------
3230 * <b> Private * Private * No problem
3231 * -----------------------------------------
3232 * <c> Global * Private * Huh, How will this work?
3233 * -----------------------------------------
3234 * <d> Global * Global * No Problem
3235 *------------------------------------------
3236 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3238 *------------------------------------------
3239 * source * dest * result
3240 * -----------------------------------------
3241 * <a> Linklocal * Global *
3242 * -----------------------------------------
3243 * <b> Linklocal * Linklocal * No problem
3244 * -----------------------------------------
3245 * <c> Global * Linklocal * Huh, How will this work?
3246 * -----------------------------------------
3247 * <d> Global * Global * No Problem
3248 *------------------------------------------
3249 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3251 * And then we add to that what happens if there are multiple addresses
3252 * assigned to an interface. Remember the ifa on a ifn is a linked
3253 * list of addresses. So one interface can have more than one IP
3254 * address. What happens if we have both a private and a global
3255 * address? Do we then use context of destination to sort out which
3256 * one is best? And what about NAT's sending P->G may get you a NAT
3257 * translation, or should you select the G thats on the interface in
3262 * - count the number of addresses on the interface.
3263 * - if it is one, no problem except case <c>.
3264 * For <a> we will assume a NAT out there.
3265 * - if there are more than one, then we need to worry about scope P
3266 * or G. We should prefer G -> G and P -> P if possible.
3267 * Then as a secondary fall back to mixed types G->P being a last
3269 * - The above all works for bound all, but bound specific we need to
3270 * use the same concept but instead only consider the bound
3271 * addresses. If the bound set is NOT assigned to the interface then
3272 * we must use rotation amongst the bound addresses..
3274 if (ro->ro_rt == NULL) {
3276 * Need a route to cache.
3278 SCTP_RTALLOC(ro, vrf_id);
3280 if (ro->ro_rt == NULL) {
3283 fam = ro->ro_dst.sa_family;
3284 dest_is_priv = dest_is_loop = 0;
3285 /* Setup our scopes for the destination */
3289 /* Scope based on outbound address */
3290 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3293 /* mark it as local */
3294 net->addr_is_local = 1;
3296 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3303 /* Scope based on outbound address */
3304 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3305 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3307 * If the address is a loopback address, which
3308 * consists of "::1" OR "fe80::1%lo0", we are
3309 * loopback scope. But we don't use dest_is_priv
3310 * (link local addresses).
3314 /* mark it as local */
3315 net->addr_is_local = 1;
3317 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3323 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3324 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3325 SCTP_IPI_ADDR_RLOCK();
3326 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3330 answer = sctp_choose_boundall(stcb, net, ro, vrf_id,
3331 dest_is_priv, dest_is_loop,
3332 non_asoc_addr_ok, fam);
3333 SCTP_IPI_ADDR_RUNLOCK();
3340 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3341 vrf_id, dest_is_priv,
3343 non_asoc_addr_ok, fam);
3345 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3350 SCTP_IPI_ADDR_RUNLOCK();
3355 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3358 int tlen, at, found;
3359 struct sctp_sndinfo sndinfo;
3360 struct sctp_prinfo prinfo;
3361 struct sctp_authinfo authinfo;
3363 tlen = SCTP_BUF_LEN(control);
3367 * Independent of how many mbufs, find the c_type inside the control
3368 * structure and copy out the data.
3371 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3372 /* There is not enough room for one more. */
3375 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3376 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3377 /* We dont't have a complete CMSG header. */
3380 if (((int)cmh.cmsg_len + at) > tlen) {
3381 /* We don't have the complete CMSG. */
3384 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3385 ((c_type == cmh.cmsg_type) ||
3386 ((c_type == SCTP_SNDRCV) &&
3387 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3388 (cmh.cmsg_type == SCTP_PRINFO) ||
3389 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3390 if (c_type == cmh.cmsg_type) {
3391 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < cpsize) {
3394 /* It is exactly what we want. Copy it out. */
3395 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), cpsize, (caddr_t)data);
3398 struct sctp_sndrcvinfo *sndrcvinfo;
3400 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3402 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3405 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3407 switch (cmh.cmsg_type) {
3409 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_sndinfo)) {
3412 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3413 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3414 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3415 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3416 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3417 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3420 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_prinfo)) {
3423 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3424 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3425 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3428 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_authinfo)) {
3431 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3432 sndrcvinfo->sinfo_keynumber_valid = 1;
3433 sndrcvinfo->sinfo_keynumber = authinfo.auth_keyid;
3441 at += CMSG_ALIGN(cmh.cmsg_len);
3447 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3451 struct sctp_initmsg initmsg;
3454 struct sockaddr_in sin;
3458 struct sockaddr_in6 sin6;
3462 tlen = SCTP_BUF_LEN(control);
3465 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3466 /* There is not enough room for one more. */
3470 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3471 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3472 /* We dont't have a complete CMSG header. */
3476 if (((int)cmh.cmsg_len + at) > tlen) {
3477 /* We don't have the complete CMSG. */
3481 if (cmh.cmsg_level == IPPROTO_SCTP) {
3482 switch (cmh.cmsg_type) {
3484 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct sctp_initmsg)) {
3488 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3489 if (initmsg.sinit_max_attempts)
3490 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3491 if (initmsg.sinit_num_ostreams)
3492 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3493 if (initmsg.sinit_max_instreams)
3494 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3495 if (initmsg.sinit_max_init_timeo)
3496 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3497 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3498 struct sctp_stream_out *tmp_str;
3501 /* Default is NOT correct */
3502 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3503 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3504 SCTP_TCB_UNLOCK(stcb);
3505 SCTP_MALLOC(tmp_str,
3506 struct sctp_stream_out *,
3507 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3509 SCTP_TCB_LOCK(stcb);
3510 if (tmp_str != NULL) {
3511 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3512 stcb->asoc.strmout = tmp_str;
3513 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3515 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3517 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3518 stcb->asoc.strmout[i].next_sequence_sent = 0;
3519 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3520 stcb->asoc.strmout[i].stream_no = i;
3521 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3522 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3527 case SCTP_DSTADDRV4:
3528 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3532 memset(&sin, 0, sizeof(struct sockaddr_in));
3533 sin.sin_family = AF_INET;
3534 sin.sin_len = sizeof(struct sockaddr_in);
3535 sin.sin_port = stcb->rport;
3536 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3537 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3538 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3539 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3543 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3544 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3551 case SCTP_DSTADDRV6:
3552 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3556 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3557 sin6.sin6_family = AF_INET6;
3558 sin6.sin6_len = sizeof(struct sockaddr_in6);
3559 sin6.sin6_port = stcb->rport;
3560 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3561 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3562 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3567 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3568 in6_sin6_2_sin(&sin, &sin6);
3569 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3570 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3571 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3575 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3576 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3582 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3583 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3593 at += CMSG_ALIGN(cmh.cmsg_len);
3598 static struct sctp_tcb *
3599 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3601 struct mbuf *control,
3602 struct sctp_nets **net_p,
3607 struct sctp_tcb *stcb;
3608 struct sockaddr *addr;
3611 struct sockaddr_in sin;
3615 struct sockaddr_in6 sin6;
3619 tlen = SCTP_BUF_LEN(control);
3622 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3623 /* There is not enough room for one more. */
3627 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3628 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(struct cmsghdr))) {
3629 /* We dont't have a complete CMSG header. */
3633 if (((int)cmh.cmsg_len + at) > tlen) {
3634 /* We don't have the complete CMSG. */
3638 if (cmh.cmsg_level == IPPROTO_SCTP) {
3639 switch (cmh.cmsg_type) {
3641 case SCTP_DSTADDRV4:
3642 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in_addr)) {
3646 memset(&sin, 0, sizeof(struct sockaddr_in));
3647 sin.sin_family = AF_INET;
3648 sin.sin_len = sizeof(struct sockaddr_in);
3649 sin.sin_port = port;
3650 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3651 addr = (struct sockaddr *)&sin;
3655 case SCTP_DSTADDRV6:
3656 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr))) < sizeof(struct in6_addr)) {
3660 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3661 sin6.sin6_family = AF_INET6;
3662 sin6.sin6_len = sizeof(struct sockaddr_in6);
3663 sin6.sin6_port = port;
3664 m_copydata(control, at + CMSG_ALIGN(sizeof(struct cmsghdr)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3666 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3667 in6_sin6_2_sin(&sin, &sin6);
3668 addr = (struct sockaddr *)&sin;
3671 addr = (struct sockaddr *)&sin6;
3679 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3685 at += CMSG_ALIGN(cmh.cmsg_len);
3690 static struct mbuf *
3691 sctp_add_cookie(struct mbuf *init, int init_offset,
3692 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3694 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3695 struct sctp_state_cookie *stc;
3696 struct sctp_paramhdr *ph;
3702 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3703 sizeof(struct sctp_paramhdr)), 0,
3704 M_DONTWAIT, 1, MT_DATA);
3708 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_DONTWAIT);
3709 if (copy_init == NULL) {
3713 #ifdef SCTP_MBUF_LOGGING
3714 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3719 if (SCTP_BUF_IS_EXTENDED(mat)) {
3720 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3722 mat = SCTP_BUF_NEXT(mat);
3726 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3728 if (copy_initack == NULL) {
3730 sctp_m_freem(copy_init);
3733 #ifdef SCTP_MBUF_LOGGING
3734 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3739 if (SCTP_BUF_IS_EXTENDED(mat)) {
3740 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3742 mat = SCTP_BUF_NEXT(mat);
3746 /* easy side we just drop it on the end */
3747 ph = mtod(mret, struct sctp_paramhdr *);
3748 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3749 sizeof(struct sctp_paramhdr);
3750 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3751 sizeof(struct sctp_paramhdr));
3752 ph->param_type = htons(SCTP_STATE_COOKIE);
3753 ph->param_length = 0; /* fill in at the end */
3754 /* Fill in the stc cookie data */
3755 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3757 /* tack the INIT and then the INIT-ACK onto the chain */
3759 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3760 cookie_sz += SCTP_BUF_LEN(m_at);
3761 if (SCTP_BUF_NEXT(m_at) == NULL) {
3762 SCTP_BUF_NEXT(m_at) = copy_init;
3766 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3767 cookie_sz += SCTP_BUF_LEN(m_at);
3768 if (SCTP_BUF_NEXT(m_at) == NULL) {
3769 SCTP_BUF_NEXT(m_at) = copy_initack;
3773 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3774 cookie_sz += SCTP_BUF_LEN(m_at);
3775 if (SCTP_BUF_NEXT(m_at) == NULL) {
3779 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3781 /* no space, so free the entire chain */
3785 SCTP_BUF_LEN(sig) = 0;
3786 SCTP_BUF_NEXT(m_at) = sig;
3788 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3789 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3791 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3792 cookie_sz += SCTP_SIGNATURE_SIZE;
3793 ph->param_length = htons(cookie_sz);
3799 sctp_get_ect(struct sctp_tcb *stcb)
3801 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3802 return (SCTP_ECT0_BIT);
3809 sctp_handle_no_route(struct sctp_tcb *stcb,
3810 struct sctp_nets *net,
3813 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3816 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3817 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3818 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3819 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3820 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
3821 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3823 SCTP_FAILED_THRESHOLD,
3826 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3827 net->dest_state &= ~SCTP_ADDR_PF;
3831 if (net == stcb->asoc.primary_destination) {
3832 /* need a new primary */
3833 struct sctp_nets *alt;
3835 alt = sctp_find_alternate_net(stcb, net, 0);
3837 if (stcb->asoc.alternate) {
3838 sctp_free_remote_addr(stcb->asoc.alternate);
3840 stcb->asoc.alternate = alt;
3841 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3842 if (net->ro._s_addr) {
3843 sctp_free_ifa(net->ro._s_addr);
3844 net->ro._s_addr = NULL;
3846 net->src_addr_selected = 0;
3854 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3855 struct sctp_tcb *stcb, /* may be NULL */
3856 struct sctp_nets *net,
3857 struct sockaddr *to,
3859 uint32_t auth_offset,
3860 struct sctp_auth_chunk *auth,
3861 uint16_t auth_keyid,
3862 int nofragment_flag,
3869 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3870 int so_locked SCTP_UNUSED,
3874 union sctp_sockstore *over_addr,
3877 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3880 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3881 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3882 * - fill in the HMAC digest of any AUTH chunk in the packet.
3883 * - calculate and fill in the SCTP checksum.
3884 * - prepend an IP address header.
3885 * - if boundall use INADDR_ANY.
3886 * - if boundspecific do source address selection.
3887 * - set fragmentation option for ipV4.
3888 * - On return from IP output, check/adjust mtu size of output
3889 * interface and smallest_mtu size as well.
3891 /* Will need ifdefs around this */
3894 struct sctphdr *sctphdr;
3898 sctp_route_t *ro = NULL;
3899 struct udphdr *udp = NULL;
3902 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3903 struct socket *so = NULL;
3907 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3908 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3913 vrf_id = stcb->asoc.vrf_id;
3915 vrf_id = inp->def_vrf_id;
3918 /* fill in the HMAC digest for any AUTH chunk in the packet */
3919 if ((auth != NULL) && (stcb != NULL)) {
3920 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3923 tos_value = net->dscp;
3925 tos_value = stcb->asoc.default_dscp;
3927 tos_value = inp->sctp_ep.default_dscp;
3930 switch (to->sa_family) {
3934 struct ip *ip = NULL;
3935 sctp_route_t iproute;
3938 len = sizeof(struct ip) + sizeof(struct sctphdr);
3940 len += sizeof(struct udphdr);
3942 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3945 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3948 SCTP_ALIGN_TO_END(newm, len);
3949 SCTP_BUF_LEN(newm) = len;
3950 SCTP_BUF_NEXT(newm) = m;
3954 if (net->flowidset == 0) {
3955 panic("Flow ID not set");
3958 m->m_pkthdr.flowid = net->flowid;
3959 m->m_flags |= M_FLOWID;
3961 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
3962 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
3963 m->m_flags |= M_FLOWID;
3966 packet_length = sctp_calculate_len(m);
3967 ip = mtod(m, struct ip *);
3968 ip->ip_v = IPVERSION;
3969 ip->ip_hl = (sizeof(struct ip) >> 2);
3970 if (tos_value == 0) {
3972 * This means especially, that it is not set
3973 * at the SCTP layer. So use the value from
3976 tos_value = inp->ip_inp.inp.inp_ip_tos;
3980 tos_value |= sctp_get_ect(stcb);
3982 if ((nofragment_flag) && (port == 0)) {
3987 /* FreeBSD has a function for ip_id's */
3988 ip->ip_id = ip_newid();
3990 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3991 ip->ip_len = packet_length;
3992 ip->ip_tos = tos_value;
3994 ip->ip_p = IPPROTO_UDP;
3996 ip->ip_p = IPPROTO_SCTP;
4001 memset(&iproute, 0, sizeof(iproute));
4002 memcpy(&ro->ro_dst, to, to->sa_len);
4004 ro = (sctp_route_t *) & net->ro;
4006 /* Now the address selection part */
4007 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4009 /* call the routine to select the src address */
4010 if (net && out_of_asoc_ok == 0) {
4011 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4012 sctp_free_ifa(net->ro._s_addr);
4013 net->ro._s_addr = NULL;
4014 net->src_addr_selected = 0;
4020 if (net->src_addr_selected == 0) {
4021 /* Cache the source address */
4022 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4025 net->src_addr_selected = 1;
4027 if (net->ro._s_addr == NULL) {
4028 /* No route to host */
4029 net->src_addr_selected = 0;
4030 sctp_handle_no_route(stcb, net, so_locked);
4031 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4033 return (EHOSTUNREACH);
4035 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4037 if (over_addr == NULL) {
4038 struct sctp_ifa *_lsrc;
4040 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4044 if (_lsrc == NULL) {
4045 sctp_handle_no_route(stcb, net, so_locked);
4046 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4048 return (EHOSTUNREACH);
4050 ip->ip_src = _lsrc->address.sin.sin_addr;
4051 sctp_free_ifa(_lsrc);
4053 ip->ip_src = over_addr->sin.sin_addr;
4054 SCTP_RTALLOC(ro, vrf_id);
4058 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4059 sctp_handle_no_route(stcb, net, so_locked);
4060 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4062 return (EHOSTUNREACH);
4064 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4065 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4066 udp->uh_dport = port;
4067 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4069 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4073 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4075 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4078 sctphdr->src_port = src_port;
4079 sctphdr->dest_port = dest_port;
4080 sctphdr->v_tag = v_tag;
4081 sctphdr->checksum = 0;
4084 * If source address selection fails and we find no
4085 * route then the ip_output should fail as well with
4086 * a NO_ROUTE_TO_HOST type error. We probably should
4087 * catch that somewhere and abort the association
4088 * right away (assuming this is an INIT being sent).
4090 if (ro->ro_rt == NULL) {
4092 * src addr selection failed to find a route
4093 * (or valid source addr), so we can't get
4094 * there from here (yet)!
4096 sctp_handle_no_route(stcb, net, so_locked);
4097 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4099 return (EHOSTUNREACH);
4101 if (ro != &iproute) {
4102 memcpy(&iproute, ro, sizeof(*ro));
4104 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4105 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4106 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4107 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4108 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4111 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4112 /* failed to prepend data, give up */
4113 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4117 #ifdef SCTP_PACKET_LOGGING
4118 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4119 sctp_packet_log(m, packet_length);
4121 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4123 #if defined(SCTP_WITH_NO_CSUM)
4124 SCTP_STAT_INCR(sctps_sendnocrc);
4126 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4128 (stcb->asoc.loopback_scope))) {
4129 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4130 SCTP_STAT_INCR(sctps_sendswcrc);
4132 SCTP_STAT_INCR(sctps_sendnocrc);
4136 SCTP_ENABLE_UDP_CSUM(o_pak);
4139 #if defined(SCTP_WITH_NO_CSUM)
4140 SCTP_STAT_INCR(sctps_sendnocrc);
4142 m->m_pkthdr.csum_flags = CSUM_SCTP;
4143 m->m_pkthdr.csum_data = 0;
4144 SCTP_STAT_INCR(sctps_sendhwcrc);
4147 /* send it out. table id is taken from stcb */
4148 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4149 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4150 so = SCTP_INP_SO(inp);
4151 SCTP_SOCKET_UNLOCK(so, 0);
4154 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4155 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4156 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4157 atomic_add_int(&stcb->asoc.refcnt, 1);
4158 SCTP_TCB_UNLOCK(stcb);
4159 SCTP_SOCKET_LOCK(so, 0);
4160 SCTP_TCB_LOCK(stcb);
4161 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4164 SCTP_STAT_INCR(sctps_sendpackets);
4165 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4167 SCTP_STAT_INCR(sctps_senderrors);
4169 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4171 /* free tempy routes */
4178 * PMTU check versus smallest asoc MTU goes
4181 if ((ro->ro_rt != NULL) &&
4182 (net->ro._s_addr)) {
4185 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4187 mtu -= sizeof(struct udphdr);
4189 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4190 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4193 } else if (ro->ro_rt == NULL) {
4194 /* route was freed */
4195 if (net->ro._s_addr &&
4196 net->src_addr_selected) {
4197 sctp_free_ifa(net->ro._s_addr);
4198 net->ro._s_addr = NULL;
4200 net->src_addr_selected = 0;
4209 uint32_t flowlabel, flowinfo;
4210 struct ip6_hdr *ip6h;
4211 struct route_in6 ip6route;
4213 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4215 struct sockaddr_in6 lsa6_storage;
4217 u_short prev_port = 0;
4221 flowlabel = net->flowlabel;
4223 flowlabel = stcb->asoc.default_flowlabel;
4225 flowlabel = inp->sctp_ep.default_flowlabel;
4227 if (flowlabel == 0) {
4229 * This means especially, that it is not set
4230 * at the SCTP layer. So use the value from
4233 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4235 flowlabel &= 0x000fffff;
4236 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4238 len += sizeof(struct udphdr);
4240 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4243 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4246 SCTP_ALIGN_TO_END(newm, len);
4247 SCTP_BUF_LEN(newm) = len;
4248 SCTP_BUF_NEXT(newm) = m;
4252 if (net->flowidset == 0) {
4253 panic("Flow ID not set");
4256 m->m_pkthdr.flowid = net->flowid;
4257 m->m_flags |= M_FLOWID;
4259 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
4260 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
4261 m->m_flags |= M_FLOWID;
4264 packet_length = sctp_calculate_len(m);
4266 ip6h = mtod(m, struct ip6_hdr *);
4267 /* protect *sin6 from overwrite */
4268 sin6 = (struct sockaddr_in6 *)to;
4272 /* KAME hack: embed scopeid */
4273 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4274 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4278 memset(&ip6route, 0, sizeof(ip6route));
4279 ro = (sctp_route_t *) & ip6route;
4280 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4282 ro = (sctp_route_t *) & net->ro;
4285 * We assume here that inp_flow is in host byte
4286 * order within the TCB!
4288 if (tos_value == 0) {
4290 * This means especially, that it is not set
4291 * at the SCTP layer. So use the value from
4294 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4298 tos_value |= sctp_get_ect(stcb);
4302 flowinfo |= tos_value;
4304 flowinfo |= flowlabel;
4305 ip6h->ip6_flow = htonl(flowinfo);
4307 ip6h->ip6_nxt = IPPROTO_UDP;
4309 ip6h->ip6_nxt = IPPROTO_SCTP;
4311 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4312 ip6h->ip6_dst = sin6->sin6_addr;
4315 * Add SRC address selection here: we can only reuse
4316 * to a limited degree the kame src-addr-sel, since
4317 * we can try their selection but it may not be
4320 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4321 lsa6_tmp.sin6_family = AF_INET6;
4322 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4324 if (net && out_of_asoc_ok == 0) {
4325 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4326 sctp_free_ifa(net->ro._s_addr);
4327 net->ro._s_addr = NULL;
4328 net->src_addr_selected = 0;
4334 if (net->src_addr_selected == 0) {
4335 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4336 /* KAME hack: embed scopeid */
4337 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4338 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4341 /* Cache the source address */
4342 net->ro._s_addr = sctp_source_address_selection(inp,
4348 (void)sa6_recoverscope(sin6);
4349 net->src_addr_selected = 1;
4351 if (net->ro._s_addr == NULL) {
4352 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4353 net->src_addr_selected = 0;
4354 sctp_handle_no_route(stcb, net, so_locked);
4355 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4357 return (EHOSTUNREACH);
4359 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4361 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4362 /* KAME hack: embed scopeid */
4363 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4364 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4367 if (over_addr == NULL) {
4368 struct sctp_ifa *_lsrc;
4370 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4374 if (_lsrc == NULL) {
4375 sctp_handle_no_route(stcb, net, so_locked);
4376 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4378 return (EHOSTUNREACH);
4380 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4381 sctp_free_ifa(_lsrc);
4383 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4384 SCTP_RTALLOC(ro, vrf_id);
4386 (void)sa6_recoverscope(sin6);
4388 lsa6->sin6_port = inp->sctp_lport;
4390 if (ro->ro_rt == NULL) {
4392 * src addr selection failed to find a route
4393 * (or valid source addr), so we can't get
4396 sctp_handle_no_route(stcb, net, so_locked);
4397 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4399 return (EHOSTUNREACH);
4402 * XXX: sa6 may not have a valid sin6_scope_id in
4403 * the non-SCOPEDROUTING case.
4405 bzero(&lsa6_storage, sizeof(lsa6_storage));
4406 lsa6_storage.sin6_family = AF_INET6;
4407 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4408 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4409 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4410 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4415 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4416 lsa6_storage.sin6_port = inp->sctp_lport;
4417 lsa6 = &lsa6_storage;
4418 ip6h->ip6_src = lsa6->sin6_addr;
4421 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4422 sctp_handle_no_route(stcb, net, so_locked);
4423 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4425 return (EHOSTUNREACH);
4427 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4428 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4429 udp->uh_dport = port;
4430 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4432 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4434 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4437 sctphdr->src_port = src_port;
4438 sctphdr->dest_port = dest_port;
4439 sctphdr->v_tag = v_tag;
4440 sctphdr->checksum = 0;
4443 * We set the hop limit now since there is a good
4444 * chance that our ro pointer is now filled
4446 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4447 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4450 /* Copy to be sure something bad is not happening */
4451 sin6->sin6_addr = ip6h->ip6_dst;
4452 lsa6->sin6_addr = ip6h->ip6_src;
4455 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4456 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4457 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4458 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4459 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4461 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4463 * preserve the port and scope for link
4466 prev_scope = sin6->sin6_scope_id;
4467 prev_port = sin6->sin6_port;
4469 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4470 /* failed to prepend data, give up */
4472 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4475 #ifdef SCTP_PACKET_LOGGING
4476 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4477 sctp_packet_log(m, packet_length);
4479 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4481 #if defined(SCTP_WITH_NO_CSUM)
4482 SCTP_STAT_INCR(sctps_sendnocrc);
4484 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4486 (stcb->asoc.loopback_scope))) {
4487 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4488 SCTP_STAT_INCR(sctps_sendswcrc);
4490 SCTP_STAT_INCR(sctps_sendnocrc);
4493 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4494 udp->uh_sum = 0xffff;
4497 #if defined(SCTP_WITH_NO_CSUM)
4498 SCTP_STAT_INCR(sctps_sendnocrc);
4500 m->m_pkthdr.csum_flags = CSUM_SCTP;
4501 m->m_pkthdr.csum_data = 0;
4502 SCTP_STAT_INCR(sctps_sendhwcrc);
4505 /* send it out. table id is taken from stcb */
4506 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4507 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4508 so = SCTP_INP_SO(inp);
4509 SCTP_SOCKET_UNLOCK(so, 0);
4512 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4513 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4514 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4515 atomic_add_int(&stcb->asoc.refcnt, 1);
4516 SCTP_TCB_UNLOCK(stcb);
4517 SCTP_SOCKET_LOCK(so, 0);
4518 SCTP_TCB_LOCK(stcb);
4519 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4523 /* for link local this must be done */
4524 sin6->sin6_scope_id = prev_scope;
4525 sin6->sin6_port = prev_port;
4527 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4528 SCTP_STAT_INCR(sctps_sendpackets);
4529 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4531 SCTP_STAT_INCR(sctps_senderrors);
4534 /* Now if we had a temp route free it */
4540 * PMTU check versus smallest asoc MTU goes
4543 if (ro->ro_rt == NULL) {
4544 /* Route was freed */
4545 if (net->ro._s_addr &&
4546 net->src_addr_selected) {
4547 sctp_free_ifa(net->ro._s_addr);
4548 net->ro._s_addr = NULL;
4550 net->src_addr_selected = 0;
4552 if ((ro->ro_rt != NULL) &&
4553 (net->ro._s_addr)) {
4556 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4558 (stcb->asoc.smallest_mtu > mtu)) {
4559 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4562 net->mtu -= sizeof(struct udphdr);
4566 if (ND_IFINFO(ifp)->linkmtu &&
4567 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4568 sctp_mtu_size_reset(inp,
4570 ND_IFINFO(ifp)->linkmtu);
4578 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4579 ((struct sockaddr *)to)->sa_family);
4581 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4588 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4589 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4594 struct mbuf *m, *m_at, *mp_last;
4595 struct sctp_nets *net;
4596 struct sctp_init_chunk *init;
4597 struct sctp_supported_addr_param *sup_addr;
4598 struct sctp_adaptation_layer_indication *ali;
4599 struct sctp_ecn_supported_param *ecn;
4600 struct sctp_prsctp_supported_param *prsctp;
4601 struct sctp_supported_chunk_types_param *pr_supported;
4602 int cnt_inits_to = 0;
4607 /* INIT's always go to the primary (and usually ONLY address) */
4609 net = stcb->asoc.primary_destination;
4611 net = TAILQ_FIRST(&stcb->asoc.nets);
4616 /* we confirm any address we send an INIT to */
4617 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4618 (void)sctp_set_primary_addr(stcb, NULL, net);
4620 /* we confirm any address we send an INIT to */
4621 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4623 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4625 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4627 * special hook, if we are sending to link local it will not
4628 * show up in our private address count.
4630 struct sockaddr_in6 *sin6l;
4632 sin6l = &net->ro._l_addr.sin6;
4633 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4637 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4638 /* This case should not happen */
4639 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4642 /* start the INIT timer */
4643 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4645 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4647 /* No memory, INIT timer will re-attempt. */
4648 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4651 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4653 * assume peer supports asconf in order to be able to queue local
4654 * address changes while an INIT is in flight and before the assoc
4657 stcb->asoc.peer_supports_asconf = 1;
4658 /* Now lets put the SCTP header in place */
4659 init = mtod(m, struct sctp_init_chunk *);
4660 /* now the chunk header */
4661 init->ch.chunk_type = SCTP_INITIATION;
4662 init->ch.chunk_flags = 0;
4663 /* fill in later from mbuf we build */
4664 init->ch.chunk_length = 0;
4665 /* place in my tag */
4666 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4667 /* set up some of the credits. */
4668 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4669 SCTP_MINIMAL_RWND));
4671 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4672 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4673 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4674 /* now the address restriction */
4675 /* XXX Should we take the address family of the socket into account? */
4676 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4678 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4681 /* we support 2 types: IPv4/IPv6 */
4682 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t));
4683 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4684 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4686 /* we support 1 type: IPv6 */
4687 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4688 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS);
4689 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4692 /* we support 1 type: IPv4 */
4693 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4694 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4695 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4697 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param);
4698 /* adaptation layer indication parameter */
4699 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param));
4700 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4701 ali->ph.param_length = htons(sizeof(*ali));
4702 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4703 SCTP_BUF_LEN(m) += sizeof(*ali);
4704 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4706 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4707 /* Add NAT friendly parameter */
4708 struct sctp_paramhdr *ph;
4710 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4711 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4712 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4713 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4714 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4716 /* now any cookie time extensions */
4717 if (stcb->asoc.cookie_preserve_req) {
4718 struct sctp_cookie_perserve_param *cookie_preserve;
4720 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4721 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4722 cookie_preserve->ph.param_length = htons(
4723 sizeof(*cookie_preserve));
4724 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4725 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4726 ecn = (struct sctp_ecn_supported_param *)(
4727 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4728 stcb->asoc.cookie_preserve_req = 0;
4731 if (stcb->asoc.ecn_allowed == 1) {
4732 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4733 ecn->ph.param_length = htons(sizeof(*ecn));
4734 SCTP_BUF_LEN(m) += sizeof(*ecn);
4735 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4738 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4740 /* And now tell the peer we do pr-sctp */
4741 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4742 prsctp->ph.param_length = htons(sizeof(*prsctp));
4743 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4745 /* And now tell the peer we do all the extensions */
4746 pr_supported = (struct sctp_supported_chunk_types_param *)
4747 ((caddr_t)prsctp + sizeof(*prsctp));
4748 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4750 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4751 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4752 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4753 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4754 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4755 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4756 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4758 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4759 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4761 p_len = sizeof(*pr_supported) + num_ext;
4762 pr_supported->ph.param_length = htons(p_len);
4763 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4764 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4767 /* add authentication parameters */
4768 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4769 struct sctp_auth_random *randp;
4770 struct sctp_auth_hmac_algo *hmacs;
4771 struct sctp_auth_chunk_list *chunks;
4773 /* attach RANDOM parameter, if available */
4774 if (stcb->asoc.authinfo.random != NULL) {
4775 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4776 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4777 /* random key already contains the header */
4778 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4779 /* zero out any padding required */
4780 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4781 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4783 /* add HMAC_ALGO parameter */
4784 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4785 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4786 (uint8_t *) hmacs->hmac_ids);
4788 p_len += sizeof(*hmacs);
4789 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4790 hmacs->ph.param_length = htons(p_len);
4791 /* zero out any padding required */
4792 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4793 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4795 /* add CHUNKS parameter */
4796 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4797 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4798 chunks->chunk_types);
4800 p_len += sizeof(*chunks);
4801 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4802 chunks->ph.param_length = htons(p_len);
4803 /* zero out any padding required */
4804 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4805 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4808 /* now the addresses */
4810 struct sctp_scoping scp;
4813 * To optimize this we could put the scoping stuff into a
4814 * structure and remove the individual uint8's from the
4815 * assoc structure. Then we could just sifa in the address
4816 * within the stcb. But for now this is a quick hack to get
4817 * the address stuff teased apart.
4820 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4821 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4822 scp.loopback_scope = stcb->asoc.loopback_scope;
4823 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4824 scp.local_scope = stcb->asoc.local_scope;
4825 scp.site_scope = stcb->asoc.site_scope;
4827 sctp_add_addresses_to_i_ia(inp, stcb, &scp, m, cnt_inits_to);
4830 /* calulate the size and update pkt header and chunk header */
4832 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4833 if (SCTP_BUF_NEXT(m_at) == NULL)
4835 p_len += SCTP_BUF_LEN(m_at);
4837 init->ch.chunk_length = htons(p_len);
4839 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4840 * here since the timer will drive a retranmission.
4843 /* I don't expect this to execute but we will be safe here */
4845 if ((padval) && (mp_last)) {
4847 * The compiler worries that mp_last may not be set even
4848 * though I think it is impossible :-> however we add
4849 * mp_last here just in case.
4851 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4853 /* Houston we have a problem, no space */
4858 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4859 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4860 (struct sockaddr *)&net->ro._l_addr,
4861 m, 0, NULL, 0, 0, 0, 0,
4862 inp->sctp_lport, stcb->rport, htonl(0),
4863 net->port, so_locked, NULL, NULL);
4864 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4865 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4866 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4870 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4871 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4874 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4875 * being equal to the beginning of the params i.e. (iphlen +
4876 * sizeof(struct sctp_init_msg) parse through the parameters to the
4877 * end of the mbuf verifying that all parameters are known.
4879 * For unknown parameters build and return a mbuf with
4880 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4881 * processing this chunk stop, and set *abort_processing to 1.
4883 * By having param_offset be pre-set to where parameters begin it is
4884 * hoped that this routine may be reused in the future by new
4887 struct sctp_paramhdr *phdr, params;
4889 struct mbuf *mat, *op_err;
4890 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4891 int at, limit, pad_needed;
4892 uint16_t ptype, plen, padded_size;
4895 *abort_processing = 0;
4898 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4901 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4902 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4903 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4904 ptype = ntohs(phdr->param_type);
4905 plen = ntohs(phdr->param_length);
4906 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4907 /* wacked parameter */
4908 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4911 limit -= SCTP_SIZE32(plen);
4913 * All parameters for all chunks that we know/understand are
4914 * listed here. We process them other places and make
4915 * appropriate stop actions per the upper bits. However this
4916 * is the generic routine processor's can call to get back
4917 * an operr.. to either incorporate (init-ack) or send.
4919 padded_size = SCTP_SIZE32(plen);
4921 /* Param's with variable size */
4922 case SCTP_HEARTBEAT_INFO:
4923 case SCTP_STATE_COOKIE:
4924 case SCTP_UNRECOG_PARAM:
4925 case SCTP_ERROR_CAUSE_IND:
4929 /* Param's with variable size within a range */
4930 case SCTP_CHUNK_LIST:
4931 case SCTP_SUPPORTED_CHUNK_EXT:
4932 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4938 case SCTP_SUPPORTED_ADDRTYPE:
4939 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4946 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4947 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4952 case SCTP_SET_PRIM_ADDR:
4953 case SCTP_DEL_IP_ADDRESS:
4954 case SCTP_ADD_IP_ADDRESS:
4955 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4956 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4957 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4962 /* Param's with a fixed size */
4963 case SCTP_IPV4_ADDRESS:
4964 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4965 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4970 case SCTP_IPV6_ADDRESS:
4971 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4972 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4977 case SCTP_COOKIE_PRESERVE:
4978 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4979 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4984 case SCTP_HAS_NAT_SUPPORT:
4987 case SCTP_PRSCTP_SUPPORTED:
4989 if (padded_size != sizeof(struct sctp_paramhdr)) {
4990 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4995 case SCTP_ECN_CAPABLE:
4996 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4997 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5002 case SCTP_ULP_ADAPTATION:
5003 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5004 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5009 case SCTP_SUCCESS_REPORT:
5010 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5011 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5016 case SCTP_HOSTNAME_ADDRESS:
5018 /* We can NOT handle HOST NAME addresses!! */
5021 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5022 *abort_processing = 1;
5023 if (op_err == NULL) {
5024 /* Ok need to try to get a mbuf */
5026 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5028 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5031 l_len += sizeof(struct sctp_paramhdr);
5032 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5034 SCTP_BUF_LEN(op_err) = 0;
5036 * pre-reserve space for ip
5037 * and sctp header and
5041 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5043 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5045 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5046 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5050 /* If we have space */
5051 struct sctp_paramhdr s;
5054 uint32_t cpthis = 0;
5056 pad_needed = 4 - (err_at % 4);
5057 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5058 err_at += pad_needed;
5060 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5061 s.param_length = htons(sizeof(s) + plen);
5062 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5063 err_at += sizeof(s);
5064 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5066 sctp_m_freem(op_err);
5068 * we are out of memory but
5069 * we still need to have a
5070 * look at what to do (the
5071 * system is in trouble
5076 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5083 * we do not recognize the parameter figure out what
5086 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5087 if ((ptype & 0x4000) == 0x4000) {
5088 /* Report bit is set?? */
5089 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5090 if (op_err == NULL) {
5093 /* Ok need to try to get an mbuf */
5095 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5097 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5100 l_len += sizeof(struct sctp_paramhdr);
5101 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5103 SCTP_BUF_LEN(op_err) = 0;
5105 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5107 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5109 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5110 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5114 /* If we have space */
5115 struct sctp_paramhdr s;
5118 uint32_t cpthis = 0;
5120 pad_needed = 4 - (err_at % 4);
5121 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5122 err_at += pad_needed;
5124 s.param_type = htons(SCTP_UNRECOG_PARAM);
5125 s.param_length = htons(sizeof(s) + plen);
5126 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5127 err_at += sizeof(s);
5128 if (plen > sizeof(tempbuf)) {
5129 plen = sizeof(tempbuf);
5131 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5133 sctp_m_freem(op_err);
5135 * we are out of memory but
5136 * we still need to have a
5137 * look at what to do (the
5138 * system is in trouble
5142 goto more_processing;
5144 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5149 if ((ptype & 0x8000) == 0x0000) {
5150 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5153 /* skip this chunk and continue processing */
5154 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5155 at += SCTP_SIZE32(plen);
5160 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5164 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5165 *abort_processing = 1;
5166 if ((op_err == NULL) && phdr) {
5170 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5172 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5174 l_len += (2 * sizeof(struct sctp_paramhdr));
5175 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5177 SCTP_BUF_LEN(op_err) = 0;
5179 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5181 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5183 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5184 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5187 if ((op_err) && phdr) {
5188 struct sctp_paramhdr s;
5191 uint32_t cpthis = 0;
5193 pad_needed = 4 - (err_at % 4);
5194 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5195 err_at += pad_needed;
5197 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5198 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5199 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5200 err_at += sizeof(s);
5201 /* Only copy back the p-hdr that caused the issue */
5202 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5208 sctp_are_there_new_addresses(struct sctp_association *asoc,
5209 struct mbuf *in_initpkt, int offset)
5212 * Given a INIT packet, look through the packet to verify that there
5213 * are NO new addresses. As we go through the parameters add reports
5214 * of any un-understood parameters that require an error. Also we
5215 * must return (1) to drop the packet if we see a un-understood
5216 * parameter that tells us to drop the chunk.
5218 struct sockaddr *sa_touse;
5219 struct sockaddr *sa;
5220 struct sctp_paramhdr *phdr, params;
5221 uint16_t ptype, plen;
5223 struct sctp_nets *net;
5227 struct sockaddr_in sin4, *sa4;
5231 struct sockaddr_in6 sin6, *sa6;
5232 struct ip6_hdr *ip6h;
5237 memset(&sin4, 0, sizeof(sin4));
5238 sin4.sin_family = AF_INET;
5239 sin4.sin_len = sizeof(sin4);
5242 memset(&sin6, 0, sizeof(sin6));
5243 sin6.sin6_family = AF_INET6;
5244 sin6.sin6_len = sizeof(sin6);
5247 /* First what about the src address of the pkt ? */
5248 iph = mtod(in_initpkt, struct ip *);
5249 switch (iph->ip_v) {
5252 /* source addr is IPv4 */
5253 sin4.sin_addr = iph->ip_src;
5254 sa_touse = (struct sockaddr *)&sin4;
5258 case IPV6_VERSION >> 4:
5259 /* source addr is IPv6 */
5260 ip6h = mtod(in_initpkt, struct ip6_hdr *);
5261 sin6.sin6_addr = ip6h->ip6_src;
5262 sa_touse = (struct sockaddr *)&sin6;
5270 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5271 sa = (struct sockaddr *)&net->ro._l_addr;
5272 if (sa->sa_family == sa_touse->sa_family) {
5274 if (sa->sa_family == AF_INET) {
5275 sa4 = (struct sockaddr_in *)sa;
5276 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) {
5283 if (sa->sa_family == AF_INET6) {
5284 sa6 = (struct sockaddr_in6 *)sa;
5285 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) {
5294 /* New address added! no need to look futher. */
5297 /* Ok so far lets munge through the rest of the packet */
5298 offset += sizeof(struct sctp_init_chunk);
5299 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5302 ptype = ntohs(phdr->param_type);
5303 plen = ntohs(phdr->param_length);
5306 case SCTP_IPV4_ADDRESS:
5308 struct sctp_ipv4addr_param *p4, p4_buf;
5310 phdr = sctp_get_next_param(in_initpkt, offset,
5311 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5312 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5316 p4 = (struct sctp_ipv4addr_param *)phdr;
5317 sin4.sin_addr.s_addr = p4->addr;
5318 sa_touse = (struct sockaddr *)&sin4;
5323 case SCTP_IPV6_ADDRESS:
5325 struct sctp_ipv6addr_param *p6, p6_buf;
5327 phdr = sctp_get_next_param(in_initpkt, offset,
5328 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5329 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5333 p6 = (struct sctp_ipv6addr_param *)phdr;
5334 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5336 sa_touse = (struct sockaddr *)&sin6;
5345 /* ok, sa_touse points to one to check */
5347 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5348 sa = (struct sockaddr *)&net->ro._l_addr;
5349 if (sa->sa_family != sa_touse->sa_family) {
5353 if (sa->sa_family == AF_INET) {
5354 sa4 = (struct sockaddr_in *)sa;
5355 if (sa4->sin_addr.s_addr ==
5356 sin4.sin_addr.s_addr) {
5363 if (sa->sa_family == AF_INET6) {
5364 sa6 = (struct sockaddr_in6 *)sa;
5365 if (SCTP6_ARE_ADDR_EQUAL(
5374 /* New addr added! no need to look further */
5378 offset += SCTP_SIZE32(plen);
5379 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5385 * Given a MBUF chain that was sent into us containing an INIT. Build a
5386 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5387 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5388 * message (i.e. the struct sctp_init_msg).
5391 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5392 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
5393 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5395 struct sctp_association *asoc;
5396 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5397 struct sctp_init_ack_chunk *initack;
5398 struct sctp_adaptation_layer_indication *ali;
5399 struct sctp_ecn_supported_param *ecn;
5400 struct sctp_prsctp_supported_param *prsctp;
5401 struct sctp_supported_chunk_types_param *pr_supported;
5402 union sctp_sockstore store, store1, *over_addr;
5405 struct sockaddr_in *sin, *to_sin;
5409 struct sockaddr_in6 *sin6, *to_sin6;
5415 struct ip6_hdr *ip6;
5418 struct sockaddr *to;
5419 struct sctp_state_cookie stc;
5420 struct sctp_nets *net = NULL;
5421 uint8_t *signature = NULL;
5422 int cnt_inits_to = 0;
5423 uint16_t his_limit, i_want;
5424 int abort_flag, padval;
5427 int nat_friendly = 0;
5435 if ((asoc != NULL) &&
5436 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5437 (sctp_are_there_new_addresses(asoc, init_pkt, offset))) {
5438 /* new addresses, out of here in non-cookie-wait states */
5440 * Send a ABORT, we don't add the new address error clause
5441 * though we even set the T bit and copy in the 0 tag.. this
5442 * looks no different than if no listener was present.
5444 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5448 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5449 (offset + sizeof(struct sctp_init_chunk)),
5450 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5453 sctp_send_abort(init_pkt, iphlen, sh,
5454 init_chk->init.initiate_tag, op_err, vrf_id, port);
5457 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5459 /* No memory, INIT timer will re-attempt. */
5461 sctp_m_freem(op_err);
5464 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5466 /* the time I built cookie */
5467 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5469 /* populate any tie tags */
5471 /* unlock before tag selections */
5472 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5473 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5474 stc.cookie_life = asoc->cookie_life;
5475 net = asoc->primary_destination;
5477 stc.tie_tag_my_vtag = 0;
5478 stc.tie_tag_peer_vtag = 0;
5479 /* life I will award this cookie */
5480 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5483 /* copy in the ports for later check */
5484 stc.myport = sh->dest_port;
5485 stc.peerport = sh->src_port;
5488 * If we wanted to honor cookie life extentions, we would add to
5489 * stc.cookie_life. For now we should NOT honor any extension
5491 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5492 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5493 struct inpcb *in_inp;
5495 /* Its a V6 socket */
5496 in_inp = (struct inpcb *)inp;
5497 stc.ipv6_addr_legal = 1;
5498 /* Now look at the binding flag to see if V4 will be legal */
5499 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5500 stc.ipv4_addr_legal = 1;
5502 /* V4 addresses are NOT legal on the association */
5503 stc.ipv4_addr_legal = 0;
5506 /* Its a V4 socket, no - V6 */
5507 stc.ipv4_addr_legal = 1;
5508 stc.ipv6_addr_legal = 0;
5511 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5516 /* now for scope setup */
5517 memset((caddr_t)&store, 0, sizeof(store));
5518 memset((caddr_t)&store1, 0, sizeof(store1));
5521 to_sin = &store1.sin;
5525 to_sin6 = &store1.sin6;
5527 iph = mtod(init_pkt, struct ip *);
5528 /* establish the to_addr's */
5529 switch (iph->ip_v) {
5532 to_sin->sin_port = sh->dest_port;
5533 to_sin->sin_family = AF_INET;
5534 to_sin->sin_len = sizeof(struct sockaddr_in);
5535 to_sin->sin_addr = iph->ip_dst;
5539 case IPV6_VERSION >> 4:
5540 ip6 = mtod(init_pkt, struct ip6_hdr *);
5541 to_sin6->sin6_addr = ip6->ip6_dst;
5542 to_sin6->sin6_scope_id = 0;
5543 to_sin6->sin6_port = sh->dest_port;
5544 to_sin6->sin6_family = AF_INET6;
5545 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5554 to = (struct sockaddr *)&store;
5555 switch (iph->ip_v) {
5559 sin->sin_family = AF_INET;
5560 sin->sin_len = sizeof(struct sockaddr_in);
5561 sin->sin_port = sh->src_port;
5562 sin->sin_addr = iph->ip_src;
5563 /* lookup address */
5564 stc.address[0] = sin->sin_addr.s_addr;
5568 stc.addr_type = SCTP_IPV4_ADDRESS;
5569 /* local from address */
5570 stc.laddress[0] = to_sin->sin_addr.s_addr;
5571 stc.laddress[1] = 0;
5572 stc.laddress[2] = 0;
5573 stc.laddress[3] = 0;
5574 stc.laddr_type = SCTP_IPV4_ADDRESS;
5575 /* scope_id is only for v6 */
5577 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5578 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5583 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5584 /* Must use the address in this case */
5585 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5586 stc.loopback_scope = 1;
5589 stc.local_scope = 0;
5595 case IPV6_VERSION >> 4:
5597 ip6 = mtod(init_pkt, struct ip6_hdr *);
5598 sin6->sin6_family = AF_INET6;
5599 sin6->sin6_len = sizeof(struct sockaddr_in6);
5600 sin6->sin6_port = sh->src_port;
5601 sin6->sin6_addr = ip6->ip6_src;
5602 /* lookup address */
5603 memcpy(&stc.address, &sin6->sin6_addr,
5604 sizeof(struct in6_addr));
5605 sin6->sin6_scope_id = 0;
5606 stc.addr_type = SCTP_IPV6_ADDRESS;
5608 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5610 * FIX ME: does this have scope from
5613 (void)sa6_recoverscope(sin6);
5614 stc.scope_id = sin6->sin6_scope_id;
5615 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5616 stc.loopback_scope = 1;
5617 stc.local_scope = 0;
5620 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5622 * If the new destination is a
5623 * LINK_LOCAL we must have common
5624 * both site and local scope. Don't
5625 * set local scope though since we
5626 * must depend on the source to be
5627 * added implicitly. We cannot
5628 * assure just because we share one
5629 * link that all links are common.
5631 stc.local_scope = 0;
5635 * we start counting for the private
5636 * address stuff at 1. since the
5637 * link local we source from won't
5638 * show up in our scoped count.
5642 * pull out the scope_id from
5646 * FIX ME: does this have scope from
5649 (void)sa6_recoverscope(sin6);
5650 stc.scope_id = sin6->sin6_scope_id;
5651 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5652 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5654 * If the new destination is
5655 * SITE_LOCAL then we must have site
5660 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5661 stc.laddr_type = SCTP_IPV6_ADDRESS;
5671 /* set the scope per the existing tcb */
5674 struct sctp_nets *lnet;
5678 stc.loopback_scope = asoc->loopback_scope;
5679 stc.ipv4_scope = asoc->ipv4_local_scope;
5680 stc.site_scope = asoc->site_scope;
5681 stc.local_scope = asoc->local_scope;
5683 /* Why do we not consider IPv4 LL addresses? */
5684 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5685 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5686 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5688 * if we have a LL address, start
5696 /* use the net pointer */
5697 to = (struct sockaddr *)&net->ro._l_addr;
5698 switch (to->sa_family) {
5701 sin = (struct sockaddr_in *)to;
5702 stc.address[0] = sin->sin_addr.s_addr;
5706 stc.addr_type = SCTP_IPV4_ADDRESS;
5707 if (net->src_addr_selected == 0) {
5709 * strange case here, the INIT should have
5710 * did the selection.
5712 net->ro._s_addr = sctp_source_address_selection(inp,
5713 stcb, (sctp_route_t *) & net->ro,
5715 if (net->ro._s_addr == NULL)
5718 net->src_addr_selected = 1;
5721 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5722 stc.laddress[1] = 0;
5723 stc.laddress[2] = 0;
5724 stc.laddress[3] = 0;
5725 stc.laddr_type = SCTP_IPV4_ADDRESS;
5726 /* scope_id is only for v6 */
5732 sin6 = (struct sockaddr_in6 *)to;
5733 memcpy(&stc.address, &sin6->sin6_addr,
5734 sizeof(struct in6_addr));
5735 stc.addr_type = SCTP_IPV6_ADDRESS;
5736 stc.scope_id = sin6->sin6_scope_id;
5737 if (net->src_addr_selected == 0) {
5739 * strange case here, the INIT should have
5740 * did the selection.
5742 net->ro._s_addr = sctp_source_address_selection(inp,
5743 stcb, (sctp_route_t *) & net->ro,
5745 if (net->ro._s_addr == NULL)
5748 net->src_addr_selected = 1;
5750 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5751 sizeof(struct in6_addr));
5752 stc.laddr_type = SCTP_IPV6_ADDRESS;
5757 /* Now lets put the SCTP header in place */
5758 initack = mtod(m, struct sctp_init_ack_chunk *);
5759 /* Save it off for quick ref */
5760 stc.peers_vtag = init_chk->init.initiate_tag;
5762 memcpy(stc.identification, SCTP_VERSION_STRING,
5763 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5764 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5765 /* now the chunk header */
5766 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5767 initack->ch.chunk_flags = 0;
5768 /* fill in later from mbuf we build */
5769 initack->ch.chunk_length = 0;
5770 /* place in my tag */
5771 if ((asoc != NULL) &&
5772 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5773 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5774 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5775 /* re-use the v-tags and init-seq here */
5776 initack->init.initiate_tag = htonl(asoc->my_vtag);
5777 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5779 uint32_t vtag, itsn;
5781 if (hold_inp_lock) {
5782 SCTP_INP_INCR_REF(inp);
5783 SCTP_INP_RUNLOCK(inp);
5786 atomic_add_int(&asoc->refcnt, 1);
5787 SCTP_TCB_UNLOCK(stcb);
5789 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5790 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5792 * Got a duplicate vtag on some guy behind a
5793 * nat make sure we don't use it.
5797 initack->init.initiate_tag = htonl(vtag);
5798 /* get a TSN to use too */
5799 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5800 initack->init.initial_tsn = htonl(itsn);
5801 SCTP_TCB_LOCK(stcb);
5802 atomic_add_int(&asoc->refcnt, -1);
5804 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5805 initack->init.initiate_tag = htonl(vtag);
5806 /* get a TSN to use too */
5807 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5809 if (hold_inp_lock) {
5810 SCTP_INP_RLOCK(inp);
5811 SCTP_INP_DECR_REF(inp);
5814 /* save away my tag to */
5815 stc.my_vtag = initack->init.initiate_tag;
5817 /* set up some of the credits. */
5818 so = inp->sctp_socket;
5820 /* memory problem */
5824 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5826 /* set what I want */
5827 his_limit = ntohs(init_chk->init.num_inbound_streams);
5828 /* choose what I want */
5830 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5831 i_want = asoc->streamoutcnt;
5833 i_want = inp->sctp_ep.pre_open_stream_count;
5836 i_want = inp->sctp_ep.pre_open_stream_count;
5838 if (his_limit < i_want) {
5839 /* I Want more :< */
5840 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5842 /* I can have what I want :> */
5843 initack->init.num_outbound_streams = htons(i_want);
5845 /* tell him his limt. */
5846 initack->init.num_inbound_streams =
5847 htons(inp->sctp_ep.max_open_streams_intome);
5849 /* adaptation layer indication parameter */
5850 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5851 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5852 ali->ph.param_length = htons(sizeof(*ali));
5853 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5854 SCTP_BUF_LEN(m) += sizeof(*ali);
5855 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5858 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5859 (inp->sctp_ecn_enable == 1)) {
5860 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5861 ecn->ph.param_length = htons(sizeof(*ecn));
5862 SCTP_BUF_LEN(m) += sizeof(*ecn);
5864 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5867 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5869 /* And now tell the peer we do pr-sctp */
5870 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5871 prsctp->ph.param_length = htons(sizeof(*prsctp));
5872 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5874 /* Add NAT friendly parameter */
5875 struct sctp_paramhdr *ph;
5877 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5878 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5879 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5880 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5882 /* And now tell the peer we do all the extensions */
5883 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5884 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5886 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5887 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5888 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5889 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5890 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5891 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5892 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5893 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5894 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5895 p_len = sizeof(*pr_supported) + num_ext;
5896 pr_supported->ph.param_length = htons(p_len);
5897 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5898 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5900 /* add authentication parameters */
5901 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5902 struct sctp_auth_random *randp;
5903 struct sctp_auth_hmac_algo *hmacs;
5904 struct sctp_auth_chunk_list *chunks;
5905 uint16_t random_len;
5907 /* generate and add RANDOM parameter */
5908 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5909 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5910 randp->ph.param_type = htons(SCTP_RANDOM);
5911 p_len = sizeof(*randp) + random_len;
5912 randp->ph.param_length = htons(p_len);
5913 SCTP_READ_RANDOM(randp->random_data, random_len);
5914 /* zero out any padding required */
5915 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5916 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5918 /* add HMAC_ALGO parameter */
5919 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5920 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5921 (uint8_t *) hmacs->hmac_ids);
5923 p_len += sizeof(*hmacs);
5924 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5925 hmacs->ph.param_length = htons(p_len);
5926 /* zero out any padding required */
5927 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5928 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5930 /* add CHUNKS parameter */
5931 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5932 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5933 chunks->chunk_types);
5935 p_len += sizeof(*chunks);
5936 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5937 chunks->ph.param_length = htons(p_len);
5938 /* zero out any padding required */
5939 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5940 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5944 /* now the addresses */
5946 struct sctp_scoping scp;
5949 * To optimize this we could put the scoping stuff into a
5950 * structure and remove the individual uint8's from the stc
5951 * structure. Then we could just sifa in the address within
5952 * the stc.. but for now this is a quick hack to get the
5953 * address stuff teased apart.
5955 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5956 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5957 scp.loopback_scope = stc.loopback_scope;
5958 scp.ipv4_local_scope = stc.ipv4_scope;
5959 scp.local_scope = stc.local_scope;
5960 scp.site_scope = stc.site_scope;
5961 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
5964 /* tack on the operational error if present */
5973 llen += SCTP_BUF_LEN(ol);
5974 ol = SCTP_BUF_NEXT(ol);
5977 /* must add a pad to the param */
5978 uint32_t cpthis = 0;
5981 padlen = 4 - (llen % 4);
5982 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5984 while (SCTP_BUF_NEXT(m_at) != NULL) {
5985 m_at = SCTP_BUF_NEXT(m_at);
5987 SCTP_BUF_NEXT(m_at) = op_err;
5988 while (SCTP_BUF_NEXT(m_at) != NULL) {
5989 m_at = SCTP_BUF_NEXT(m_at);
5992 /* pre-calulate the size and update pkt header and chunk header */
5994 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5995 p_len += SCTP_BUF_LEN(m_tmp);
5996 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5997 /* m_tmp should now point to last one */
6002 /* Now we must build a cookie */
6003 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6004 if (m_cookie == NULL) {
6005 /* memory problem */
6009 /* Now append the cookie to the end and update the space/size */
6010 SCTP_BUF_NEXT(m_tmp) = m_cookie;
6012 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6013 p_len += SCTP_BUF_LEN(m_tmp);
6014 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6015 /* m_tmp should now point to last one */
6021 * Place in the size, but we don't include the last pad (if any) in
6024 initack->ch.chunk_length = htons(p_len);
6027 * Time to sign the cookie, we don't sign over the cookie signature
6028 * though thus we set trailer.
6030 (void)sctp_hmac_m(SCTP_HMAC,
6031 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6032 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6033 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6035 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6036 * here since the timer will drive a retranmission.
6039 if ((padval) && (mp_last)) {
6040 /* see my previous comments on mp_last */
6041 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
6042 /* Houston we have a problem, no space */
6047 if (stc.loopback_scope) {
6048 over_addr = &store1;
6053 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6055 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6056 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt);
6057 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6062 sctp_prune_prsctp(struct sctp_tcb *stcb,
6063 struct sctp_association *asoc,
6064 struct sctp_sndrcvinfo *srcv,
6068 struct sctp_tmit_chunk *chk, *nchk;
6070 SCTP_TCB_LOCK_ASSERT(stcb);
6071 if ((asoc->peer_supports_prsctp) &&
6072 (asoc->sent_queue_cnt_removeable > 0)) {
6073 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6075 * Look for chunks marked with the PR_SCTP flag AND
6076 * the buffer space flag. If the one being sent is
6077 * equal or greater priority then purge the old one
6078 * and free some space.
6080 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6082 * This one is PR-SCTP AND buffer space
6085 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6087 * Lower numbers equates to higher
6088 * priority so if the one we are
6089 * looking at has a larger or equal
6090 * priority we want to drop the data
6091 * and NOT retransmit it.
6095 * We release the book_size
6096 * if the mbuf is here
6101 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6102 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT;
6104 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT;
6105 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6108 freed_spc += ret_spc;
6109 if (freed_spc >= dataout) {
6112 } /* if chunk was present */
6113 } /* if of sufficent priority */
6114 } /* if chunk has enabled */
6115 } /* tailqforeach */
6117 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6118 /* Here we must move to the sent queue and mark */
6119 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6120 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6123 * We release the book_size
6124 * if the mbuf is here
6128 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6129 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT,
6132 freed_spc += ret_spc;
6133 if (freed_spc >= dataout) {
6136 } /* end if chk->data */
6137 } /* end if right class */
6138 } /* end if chk pr-sctp */
6139 } /* tailqforeachsafe (chk) */
6140 } /* if enabled in asoc */
6144 sctp_get_frag_point(struct sctp_tcb *stcb,
6145 struct sctp_association *asoc)
6150 * For endpoints that have both v6 and v4 addresses we must reserve
6151 * room for the ipv6 header, for those that are only dealing with V4
6152 * we use a larger frag point.
6154 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6155 ovh = SCTP_MED_OVERHEAD;
6157 ovh = SCTP_MED_V4_OVERHEAD;
6160 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6161 siz = asoc->smallest_mtu - ovh;
6163 siz = (stcb->asoc.sctp_frag_point - ovh);
6165 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6167 /* A data chunk MUST fit in a cluster */
6168 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6171 /* adjust for an AUTH chunk if DATA requires auth */
6172 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6173 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6176 /* make it an even word boundary please */
6183 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6187 * We assume that the user wants PR_SCTP_TTL if the user provides a
6188 * positive lifetime but does not specify any PR_SCTP policy. This
6189 * is a BAD assumption and causes problems at least with the
6190 * U-Vancovers MPI folks. I will change this to be no policy means
6193 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6194 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6199 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6200 case CHUNK_FLAGS_PR_SCTP_BUF:
6202 * Time to live is a priority stored in tv_sec when doing
6203 * the buffer drop thing.
6205 sp->ts.tv_sec = sp->timetolive;
6208 case CHUNK_FLAGS_PR_SCTP_TTL:
6212 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6213 tv.tv_sec = sp->timetolive / 1000;
6214 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6216 * TODO sctp_constants.h needs alternative time
6217 * macros when _KERNEL is undefined.
6219 timevaladd(&sp->ts, &tv);
6222 case CHUNK_FLAGS_PR_SCTP_RTX:
6224 * Time to live is a the number or retransmissions stored in
6227 sp->ts.tv_sec = sp->timetolive;
6231 SCTPDBG(SCTP_DEBUG_USRREQ1,
6232 "Unknown PR_SCTP policy %u.\n",
6233 PR_SCTP_POLICY(sp->sinfo_flags));
6239 sctp_msg_append(struct sctp_tcb *stcb,
6240 struct sctp_nets *net,
6242 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6246 struct sctp_stream_queue_pending *sp = NULL;
6247 struct sctp_stream_out *strm;
6250 * Given an mbuf chain, put it into the association send queue and
6251 * place it on the wheel
6253 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6254 /* Invalid stream number */
6255 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6259 if ((stcb->asoc.stream_locked) &&
6260 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6261 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6265 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6266 /* Now can we send this? */
6267 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6268 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6269 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6270 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6271 /* got data while shutting down */
6272 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6276 sctp_alloc_a_strmoq(stcb, sp);
6278 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6282 sp->sinfo_flags = srcv->sinfo_flags;
6283 sp->timetolive = srcv->sinfo_timetolive;
6284 sp->ppid = srcv->sinfo_ppid;
6285 sp->context = srcv->sinfo_context;
6287 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6289 atomic_add_int(&sp->net->ref_count, 1);
6293 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6294 sp->stream = srcv->sinfo_stream;
6295 sp->msg_is_complete = 1;
6296 sp->sender_all_done = 1;
6299 sp->tail_mbuf = NULL;
6300 sctp_set_prsctp_policy(sp);
6302 * We could in theory (for sendall) sifa the length in, but we would
6303 * still have to hunt through the chain since we need to setup the
6307 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6308 if (SCTP_BUF_NEXT(at) == NULL)
6310 sp->length += SCTP_BUF_LEN(at);
6312 if (srcv->sinfo_keynumber_valid) {
6313 sp->auth_keyid = srcv->sinfo_keynumber;
6315 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6317 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6318 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6319 sp->holds_key_ref = 1;
6321 if (hold_stcb_lock == 0) {
6322 SCTP_TCB_SEND_LOCK(stcb);
6324 sctp_snd_sb_alloc(stcb, sp->length);
6325 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6326 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6327 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
6328 sp->strseq = strm->next_sequence_sent;
6329 strm->next_sequence_sent++;
6331 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6333 if (hold_stcb_lock == 0) {
6334 SCTP_TCB_SEND_UNLOCK(stcb);
6344 static struct mbuf *
6345 sctp_copy_mbufchain(struct mbuf *clonechain,
6346 struct mbuf *outchain,
6347 struct mbuf **endofchain,
6350 uint8_t copy_by_ref)
6353 struct mbuf *appendchain;
6357 if (endofchain == NULL) {
6361 sctp_m_freem(outchain);
6364 if (can_take_mbuf) {
6365 appendchain = clonechain;
6368 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6370 /* Its not in a cluster */
6371 if (*endofchain == NULL) {
6372 /* lets get a mbuf cluster */
6373 if (outchain == NULL) {
6374 /* This is the general case */
6376 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6377 if (outchain == NULL) {
6380 SCTP_BUF_LEN(outchain) = 0;
6381 *endofchain = outchain;
6382 /* get the prepend space */
6383 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6386 * We really should not get a NULL
6392 if (SCTP_BUF_NEXT(m) == NULL) {
6396 m = SCTP_BUF_NEXT(m);
6399 if (*endofchain == NULL) {
6401 * huh, TSNH XXX maybe we
6404 sctp_m_freem(outchain);
6408 /* get the new end of length */
6409 len = M_TRAILINGSPACE(*endofchain);
6411 /* how much is left at the end? */
6412 len = M_TRAILINGSPACE(*endofchain);
6414 /* Find the end of the data, for appending */
6415 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6417 /* Now lets copy it out */
6418 if (len >= sizeofcpy) {
6419 /* It all fits, copy it in */
6420 m_copydata(clonechain, 0, sizeofcpy, cp);
6421 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6423 /* fill up the end of the chain */
6425 m_copydata(clonechain, 0, len, cp);
6426 SCTP_BUF_LEN((*endofchain)) += len;
6427 /* now we need another one */
6430 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6435 SCTP_BUF_NEXT((*endofchain)) = m;
6437 cp = mtod((*endofchain), caddr_t);
6438 m_copydata(clonechain, len, sizeofcpy, cp);
6439 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6443 /* copy the old fashion way */
6444 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6445 #ifdef SCTP_MBUF_LOGGING
6446 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6451 if (SCTP_BUF_IS_EXTENDED(mat)) {
6452 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6454 mat = SCTP_BUF_NEXT(mat);
6460 if (appendchain == NULL) {
6463 sctp_m_freem(outchain);
6467 /* tack on to the end */
6468 if (*endofchain != NULL) {
6469 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6473 if (SCTP_BUF_NEXT(m) == NULL) {
6474 SCTP_BUF_NEXT(m) = appendchain;
6477 m = SCTP_BUF_NEXT(m);
6481 * save off the end and update the end-chain postion
6485 if (SCTP_BUF_NEXT(m) == NULL) {
6489 m = SCTP_BUF_NEXT(m);
6493 /* save off the end and update the end-chain postion */
6496 if (SCTP_BUF_NEXT(m) == NULL) {
6500 m = SCTP_BUF_NEXT(m);
6502 return (appendchain);
6507 sctp_med_chunk_output(struct sctp_inpcb *inp,
6508 struct sctp_tcb *stcb,
6509 struct sctp_association *asoc,
6512 int control_only, int from_where,
6513 struct timeval *now, int *now_filled, int frag_point, int so_locked
6514 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6520 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6521 uint32_t val SCTP_UNUSED)
6523 struct sctp_copy_all *ca;
6526 int added_control = 0;
6527 int un_sent, do_chunk_output = 1;
6528 struct sctp_association *asoc;
6529 struct sctp_nets *net;
6531 ca = (struct sctp_copy_all *)ptr;
6532 if (ca->m == NULL) {
6535 if (ca->inp != inp) {
6539 if ((ca->m) && ca->sndlen) {
6540 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6542 /* can't copy so we are done */
6546 #ifdef SCTP_MBUF_LOGGING
6547 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6552 if (SCTP_BUF_IS_EXTENDED(mat)) {
6553 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6555 mat = SCTP_BUF_NEXT(mat);
6562 SCTP_TCB_LOCK_ASSERT(stcb);
6563 if (stcb->asoc.alternate) {
6564 net = stcb->asoc.alternate;
6566 net = stcb->asoc.primary_destination;
6568 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6569 /* Abort this assoc with m as the user defined reason */
6571 struct sctp_paramhdr *ph;
6573 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6575 ph = mtod(m, struct sctp_paramhdr *);
6576 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6577 ph->param_length = htons(ca->sndlen);
6580 * We add one here to keep the assoc from
6581 * dis-appearing on us.
6583 atomic_add_int(&stcb->asoc.refcnt, 1);
6584 sctp_abort_an_association(inp, stcb,
6585 SCTP_RESPONSE_TO_USER_REQ,
6586 m, SCTP_SO_NOT_LOCKED);
6588 * sctp_abort_an_association calls sctp_free_asoc()
6589 * free association will NOT free it since we
6590 * incremented the refcnt .. we do this to prevent
6591 * it being freed and things getting tricky since we
6592 * could end up (from free_asoc) calling inpcb_free
6593 * which would get a recursive lock call to the
6594 * iterator lock.. But as a consequence of that the
6595 * stcb will return to us un-locked.. since
6596 * free_asoc returns with either no TCB or the TCB
6597 * unlocked, we must relock.. to unlock in the
6598 * iterator timer :-0
6600 SCTP_TCB_LOCK(stcb);
6601 atomic_add_int(&stcb->asoc.refcnt, -1);
6602 goto no_chunk_output;
6606 ret = sctp_msg_append(stcb, net, m,
6610 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6611 /* shutdown this assoc */
6614 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6616 if (TAILQ_EMPTY(&asoc->send_queue) &&
6617 TAILQ_EMPTY(&asoc->sent_queue) &&
6619 if (asoc->locked_on_sending) {
6623 * there is nothing queued to send, so I'm
6626 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6627 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6628 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6630 * only send SHUTDOWN the first time
6633 sctp_send_shutdown(stcb, net);
6634 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6635 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6637 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6638 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6639 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6641 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6642 asoc->primary_destination);
6644 do_chunk_output = 0;
6648 * we still got (or just got) data to send,
6649 * so set SHUTDOWN_PENDING
6652 * XXX sockets draft says that SCTP_EOF
6653 * should be sent with no data. currently,
6654 * we will allow user data to be sent first
6655 * and move to SHUTDOWN-PENDING
6657 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6658 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6659 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6660 if (asoc->locked_on_sending) {
6662 * Locked to send out the
6665 struct sctp_stream_queue_pending *sp;
6667 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6669 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6670 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6673 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6674 if (TAILQ_EMPTY(&asoc->send_queue) &&
6675 TAILQ_EMPTY(&asoc->sent_queue) &&
6676 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6678 atomic_add_int(&stcb->asoc.refcnt, 1);
6679 sctp_abort_an_association(stcb->sctp_ep, stcb,
6680 SCTP_RESPONSE_TO_USER_REQ,
6681 NULL, SCTP_SO_NOT_LOCKED);
6682 atomic_add_int(&stcb->asoc.refcnt, -1);
6683 goto no_chunk_output;
6685 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6686 asoc->primary_destination);
6692 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6693 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6695 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6696 (stcb->asoc.total_flight > 0) &&
6697 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6699 do_chunk_output = 0;
6701 if (do_chunk_output)
6702 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6703 else if (added_control) {
6704 int num_out = 0, reason = 0, now_filled = 0;
6708 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6709 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6710 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6721 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6723 struct sctp_copy_all *ca;
6725 ca = (struct sctp_copy_all *)ptr;
6727 * Do a notify here? Kacheong suggests that the notify be done at
6728 * the send time.. so you would push up a notification if any send
6729 * failed. Don't know if this is feasable since the only failures we
6730 * have is "memory" related and if you cannot get an mbuf to send
6731 * the data you surely can't get an mbuf to send up to notify the
6732 * user you can't send the data :->
6735 /* now free everything */
6736 sctp_m_freem(ca->m);
6737 SCTP_FREE(ca, SCTP_M_COPYAL);
6741 #define MC_ALIGN(m, len) do { \
6742 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6747 static struct mbuf *
6748 sctp_copy_out_all(struct uio *uio, int len)
6750 struct mbuf *ret, *at;
6751 int left, willcpy, cancpy, error;
6753 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6759 SCTP_BUF_LEN(ret) = 0;
6760 /* save space for the data chunk header */
6761 cancpy = M_TRAILINGSPACE(ret);
6762 willcpy = min(cancpy, left);
6765 /* Align data to the end */
6766 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6772 SCTP_BUF_LEN(at) = willcpy;
6773 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6776 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6777 if (SCTP_BUF_NEXT(at) == NULL) {
6780 at = SCTP_BUF_NEXT(at);
6781 SCTP_BUF_LEN(at) = 0;
6782 cancpy = M_TRAILINGSPACE(at);
6783 willcpy = min(cancpy, left);
6790 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6791 struct sctp_sndrcvinfo *srcv)
6794 struct sctp_copy_all *ca;
6796 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6800 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6803 memset(ca, 0, sizeof(struct sctp_copy_all));
6807 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6810 * take off the sendall flag, it would be bad if we failed to do
6813 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6814 /* get length and mbuf chain */
6816 ca->sndlen = uio->uio_resid;
6817 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6818 if (ca->m == NULL) {
6819 SCTP_FREE(ca, SCTP_M_COPYAL);
6820 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6824 /* Gather the length of the send */
6830 ca->sndlen += SCTP_BUF_LEN(m);
6831 m = SCTP_BUF_NEXT(m);
6835 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6836 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6837 SCTP_ASOC_ANY_STATE,
6839 sctp_sendall_completes, inp, 1);
6841 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6842 SCTP_FREE(ca, SCTP_M_COPYAL);
6843 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6851 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6853 struct sctp_tmit_chunk *chk, *nchk;
6855 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6856 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6857 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6859 sctp_m_freem(chk->data);
6862 asoc->ctrl_queue_cnt--;
6863 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6869 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6871 struct sctp_association *asoc;
6872 struct sctp_tmit_chunk *chk, *nchk;
6873 struct sctp_asconf_chunk *acp;
6876 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6877 /* find SCTP_ASCONF chunk in queue */
6878 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6880 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6881 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6886 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6888 sctp_m_freem(chk->data);
6891 asoc->ctrl_queue_cnt--;
6892 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6899 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6900 struct sctp_association *asoc,
6901 struct sctp_tmit_chunk **data_list,
6903 struct sctp_nets *net)
6906 struct sctp_tmit_chunk *tp1;
6908 for (i = 0; i < bundle_at; i++) {
6909 /* off of the send queue */
6910 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6911 asoc->send_queue_cnt--;
6914 * Any chunk NOT 0 you zap the time chunk 0 gets
6915 * zapped or set based on if a RTO measurment is
6918 data_list[i]->do_rtt = 0;
6921 data_list[i]->sent_rcv_time = net->last_sent_time;
6922 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6923 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6924 if (data_list[i]->whoTo == NULL) {
6925 data_list[i]->whoTo = net;
6926 atomic_add_int(&net->ref_count, 1);
6928 /* on to the sent queue */
6929 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6930 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6931 struct sctp_tmit_chunk *tpp;
6933 /* need to move back */
6935 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6937 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6941 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6944 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6946 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6951 /* This does not lower until the cum-ack passes it */
6952 asoc->sent_queue_cnt++;
6953 if ((asoc->peers_rwnd <= 0) &&
6954 (asoc->total_flight == 0) &&
6956 /* Mark the chunk as being a window probe */
6957 SCTP_STAT_INCR(sctps_windowprobed);
6959 #ifdef SCTP_AUDITING_ENABLED
6960 sctp_audit_log(0xC2, 3);
6962 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6963 data_list[i]->snd_count = 1;
6964 data_list[i]->rec.data.chunk_was_revoked = 0;
6965 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6966 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6967 data_list[i]->whoTo->flight_size,
6968 data_list[i]->book_size,
6969 (uintptr_t) data_list[i]->whoTo,
6970 data_list[i]->rec.data.TSN_seq);
6972 sctp_flight_size_increase(data_list[i]);
6973 sctp_total_flight_increase(stcb, data_list[i]);
6974 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6975 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6976 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6978 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6979 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6980 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6981 /* SWS sender side engages */
6982 asoc->peers_rwnd = 0;
6985 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6986 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6991 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6992 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6997 struct sctp_tmit_chunk *chk, *nchk;
6999 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
7000 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7001 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
7002 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
7003 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7004 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7005 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7006 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7007 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7008 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7009 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7010 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7011 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7012 /* Stray chunks must be cleaned up */
7014 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7016 sctp_m_freem(chk->data);
7019 asoc->ctrl_queue_cnt--;
7020 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7021 asoc->fwd_tsn_cnt--;
7022 sctp_free_a_chunk(stcb, chk, so_locked);
7023 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7024 /* special handling, we must look into the param */
7025 if (chk != asoc->str_reset) {
7026 goto clean_up_anyway;
7034 sctp_can_we_split_this(struct sctp_tcb *stcb,
7036 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7039 * Make a decision on if I should split a msg into multiple parts.
7040 * This is only asked of incomplete messages.
7044 * If we are doing EEOR we need to always send it if its the
7045 * entire thing, since it might be all the guy is putting in
7048 if (goal_mtu >= length) {
7050 * If we have data outstanding,
7051 * we get another chance when the sack
7052 * arrives to transmit - wait for more data
7054 if (stcb->asoc.total_flight == 0) {
7056 * If nothing is in flight, we zero the
7064 /* You can fill the rest */
7069 * For those strange folk that make the send buffer
7070 * smaller than our fragmentation point, we can't
7071 * get a full msg in so we have to allow splitting.
7073 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7076 if ((length <= goal_mtu) ||
7077 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7078 /* Sub-optimial residual don't split in non-eeor mode. */
7082 * If we reach here length is larger than the goal_mtu. Do we wish
7083 * to split it for the sake of packet putting together?
7085 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7086 /* Its ok to split it */
7087 return (min(goal_mtu, frag_point));
7089 /* Nope, can't split */
7095 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7096 struct sctp_stream_out *strq,
7098 uint32_t frag_point,
7104 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7109 /* Move from the stream to the send_queue keeping track of the total */
7110 struct sctp_association *asoc;
7111 struct sctp_stream_queue_pending *sp;
7112 struct sctp_tmit_chunk *chk;
7113 struct sctp_data_chunk *dchkh;
7114 uint32_t to_move, length;
7115 uint8_t rcv_flags = 0;
7117 uint8_t send_lock_up = 0;
7119 SCTP_TCB_LOCK_ASSERT(stcb);
7122 /* sa_ignore FREED_MEMORY */
7123 sp = TAILQ_FIRST(&strq->outqueue);
7126 if (send_lock_up == 0) {
7127 SCTP_TCB_SEND_LOCK(stcb);
7130 sp = TAILQ_FIRST(&strq->outqueue);
7134 if (strq->last_msg_incomplete) {
7135 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7137 strq->last_msg_incomplete);
7138 strq->last_msg_incomplete = 0;
7142 SCTP_TCB_SEND_UNLOCK(stcb);
7147 if ((sp->msg_is_complete) && (sp->length == 0)) {
7148 if (sp->sender_all_done) {
7150 * We are doing differed cleanup. Last time through
7151 * when we took all the data the sender_all_done was
7154 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7155 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7156 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7157 sp->sender_all_done,
7159 sp->msg_is_complete,
7163 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7164 SCTP_TCB_SEND_LOCK(stcb);
7167 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7168 TAILQ_REMOVE(&strq->outqueue, sp, next);
7169 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7171 sctp_free_remote_addr(sp->net);
7175 sctp_m_freem(sp->data);
7178 sctp_free_a_strmoq(stcb, sp, so_locked);
7179 /* we can't be locked to it */
7181 stcb->asoc.locked_on_sending = NULL;
7183 SCTP_TCB_SEND_UNLOCK(stcb);
7186 /* back to get the next msg */
7190 * sender just finished this but still holds a
7199 /* is there some to get */
7200 if (sp->length == 0) {
7206 } else if (sp->discard_rest) {
7207 if (send_lock_up == 0) {
7208 SCTP_TCB_SEND_LOCK(stcb);
7211 /* Whack down the size */
7212 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7213 if ((stcb->sctp_socket != NULL) && \
7214 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7215 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7216 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7219 sctp_m_freem(sp->data);
7221 sp->tail_mbuf = NULL;
7231 some_taken = sp->some_taken;
7232 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7233 sp->msg_is_complete = 1;
7236 length = sp->length;
7237 if (sp->msg_is_complete) {
7238 /* The message is complete */
7239 to_move = min(length, frag_point);
7240 if (to_move == length) {
7241 /* All of it fits in the MTU */
7242 if (sp->some_taken) {
7243 rcv_flags |= SCTP_DATA_LAST_FRAG;
7244 sp->put_last_out = 1;
7246 rcv_flags |= SCTP_DATA_NOT_FRAG;
7247 sp->put_last_out = 1;
7250 /* Not all of it fits, we fragment */
7251 if (sp->some_taken == 0) {
7252 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7257 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7260 * We use a snapshot of length in case it
7261 * is expanding during the compare.
7266 if (to_move >= llen) {
7268 if (send_lock_up == 0) {
7270 * We are taking all of an incomplete msg
7271 * thus we need a send lock.
7273 SCTP_TCB_SEND_LOCK(stcb);
7275 if (sp->msg_is_complete) {
7277 * the sender finished the
7284 if (sp->some_taken == 0) {
7285 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7289 /* Nothing to take. */
7290 if (sp->some_taken) {
7299 /* If we reach here, we can copy out a chunk */
7300 sctp_alloc_a_chunk(stcb, chk);
7302 /* No chunk memory */
7308 * Setup for unordered if needed by looking at the user sent info
7311 if (sp->sinfo_flags & SCTP_UNORDERED) {
7312 rcv_flags |= SCTP_DATA_UNORDERED;
7314 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7315 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7316 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7318 /* clear out the chunk before setting up */
7319 memset(chk, 0, sizeof(*chk));
7320 chk->rec.data.rcv_flags = rcv_flags;
7322 if (to_move >= length) {
7323 /* we think we can steal the whole thing */
7324 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7325 SCTP_TCB_SEND_LOCK(stcb);
7328 if (to_move < sp->length) {
7329 /* bail, it changed */
7332 chk->data = sp->data;
7333 chk->last_mbuf = sp->tail_mbuf;
7334 /* register the stealing */
7335 sp->data = sp->tail_mbuf = NULL;
7340 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7341 chk->last_mbuf = NULL;
7342 if (chk->data == NULL) {
7343 sp->some_taken = some_taken;
7344 sctp_free_a_chunk(stcb, chk, so_locked);
7349 #ifdef SCTP_MBUF_LOGGING
7350 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7355 if (SCTP_BUF_IS_EXTENDED(mat)) {
7356 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7358 mat = SCTP_BUF_NEXT(mat);
7362 /* Pull off the data */
7363 m_adj(sp->data, to_move);
7364 /* Now lets work our way down and compact it */
7366 while (m && (SCTP_BUF_LEN(m) == 0)) {
7367 sp->data = SCTP_BUF_NEXT(m);
7368 SCTP_BUF_NEXT(m) = NULL;
7369 if (sp->tail_mbuf == m) {
7371 * Freeing tail? TSNH since
7372 * we supposedly were taking less
7373 * than the sp->length.
7376 panic("Huh, freing tail? - TSNH");
7378 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7379 sp->tail_mbuf = sp->data = NULL;
7388 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7389 chk->copy_by_ref = 1;
7391 chk->copy_by_ref = 0;
7394 * get last_mbuf and counts of mb useage This is ugly but hopefully
7395 * its only one mbuf.
7397 if (chk->last_mbuf == NULL) {
7398 chk->last_mbuf = chk->data;
7399 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7400 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7403 if (to_move > length) {
7404 /*- This should not happen either
7405 * since we always lower to_move to the size
7406 * of sp->length if its larger.
7409 panic("Huh, how can to_move be larger?");
7411 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7415 atomic_subtract_int(&sp->length, to_move);
7417 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7418 /* Not enough room for a chunk header, get some */
7421 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7424 * we're in trouble here. _PREPEND below will free
7425 * all the data if there is no leading space, so we
7426 * must put the data back and restore.
7428 if (send_lock_up == 0) {
7429 SCTP_TCB_SEND_LOCK(stcb);
7432 if (chk->data == NULL) {
7433 /* unsteal the data */
7434 sp->data = chk->data;
7435 sp->tail_mbuf = chk->last_mbuf;
7439 /* reassemble the data */
7441 sp->data = chk->data;
7442 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7444 sp->some_taken = some_taken;
7445 atomic_add_int(&sp->length, to_move);
7448 sctp_free_a_chunk(stcb, chk, so_locked);
7452 SCTP_BUF_LEN(m) = 0;
7453 SCTP_BUF_NEXT(m) = chk->data;
7455 M_ALIGN(chk->data, 4);
7458 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7459 if (chk->data == NULL) {
7460 /* HELP, TSNH since we assured it would not above? */
7462 panic("prepend failes HELP?");
7464 SCTP_PRINTF("prepend fails HELP?\n");
7465 sctp_free_a_chunk(stcb, chk, so_locked);
7471 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7472 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7473 chk->book_size_scale = 0;
7474 chk->sent = SCTP_DATAGRAM_UNSENT;
7477 chk->asoc = &stcb->asoc;
7478 chk->pad_inplace = 0;
7479 chk->no_fr_allowed = 0;
7480 chk->rec.data.stream_seq = sp->strseq;
7481 chk->rec.data.stream_number = sp->stream;
7482 chk->rec.data.payloadtype = sp->ppid;
7483 chk->rec.data.context = sp->context;
7484 chk->rec.data.doing_fast_retransmit = 0;
7486 chk->rec.data.timetodrop = sp->ts;
7487 chk->flags = sp->act_flags;
7490 chk->whoTo = sp->net;
7491 atomic_add_int(&chk->whoTo->ref_count, 1);
7495 if (sp->holds_key_ref) {
7496 chk->auth_keyid = sp->auth_keyid;
7497 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7498 chk->holds_key_ref = 1;
7500 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7501 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7502 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7503 (uintptr_t) stcb, sp->length,
7504 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7505 chk->rec.data.TSN_seq);
7507 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7509 * Put the rest of the things in place now. Size was done earlier in
7510 * previous loop prior to padding.
7513 #ifdef SCTP_ASOCLOG_OF_TSNS
7514 SCTP_TCB_LOCK_ASSERT(stcb);
7515 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7516 asoc->tsn_out_at = 0;
7517 asoc->tsn_out_wrapped = 1;
7519 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7520 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7521 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7522 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7523 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7524 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7525 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7526 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7530 dchkh->ch.chunk_type = SCTP_DATA;
7531 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7532 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7533 dchkh->dp.stream_id = htons(strq->stream_no);
7534 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7535 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7536 dchkh->ch.chunk_length = htons(chk->send_size);
7537 /* Now advance the chk->send_size by the actual pad needed. */
7538 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7543 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7544 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7545 chk->pad_inplace = 1;
7547 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7548 /* pad added an mbuf */
7549 chk->last_mbuf = lm;
7551 chk->send_size += pads;
7553 /* We only re-set the policy if it is on */
7554 if (sp->pr_sctp_on) {
7555 sctp_set_prsctp_policy(sp);
7556 asoc->pr_sctp_cnt++;
7557 chk->pr_sctp_on = 1;
7559 chk->pr_sctp_on = 0;
7561 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7562 /* All done pull and kill the message */
7563 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7564 if (sp->put_last_out == 0) {
7565 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7566 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7567 sp->sender_all_done,
7569 sp->msg_is_complete,
7573 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7574 SCTP_TCB_SEND_LOCK(stcb);
7577 TAILQ_REMOVE(&strq->outqueue, sp, next);
7578 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7580 sctp_free_remote_addr(sp->net);
7584 sctp_m_freem(sp->data);
7587 sctp_free_a_strmoq(stcb, sp, so_locked);
7589 /* we can't be locked to it */
7591 stcb->asoc.locked_on_sending = NULL;
7593 /* more to go, we are locked */
7596 asoc->chunks_on_out_queue++;
7597 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7598 asoc->send_queue_cnt++;
7601 SCTP_TCB_SEND_UNLOCK(stcb);
7608 sctp_fill_outqueue(struct sctp_tcb *stcb,
7609 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7610 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7615 struct sctp_association *asoc;
7616 struct sctp_stream_out *strq;
7617 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7620 SCTP_TCB_LOCK_ASSERT(stcb);
7622 switch (net->ro._l_addr.sa.sa_family) {
7625 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7630 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7635 goal_mtu = net->mtu;
7638 /* Need an allowance for the data chunk header too */
7639 goal_mtu -= sizeof(struct sctp_data_chunk);
7641 /* must make even word boundary */
7642 goal_mtu &= 0xfffffffc;
7643 if (asoc->locked_on_sending) {
7644 /* We are stuck on one stream until the message completes. */
7645 strq = asoc->locked_on_sending;
7648 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7651 while ((goal_mtu > 0) && strq) {
7654 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7655 &giveup, eeor_mode, &bail, so_locked);
7657 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7660 asoc->locked_on_sending = strq;
7661 if ((moved_how_much == 0) || (giveup) || bail)
7662 /* no more to move for now */
7665 asoc->locked_on_sending = NULL;
7666 if ((giveup) || bail) {
7669 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7674 total_moved += moved_how_much;
7675 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7676 goal_mtu &= 0xfffffffc;
7681 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7683 if (total_moved == 0) {
7684 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7685 (net == stcb->asoc.primary_destination)) {
7686 /* ran dry for primary network net */
7687 SCTP_STAT_INCR(sctps_primary_randry);
7688 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7689 /* ran dry with CMT on */
7690 SCTP_STAT_INCR(sctps_cmt_randry);
7696 sctp_fix_ecn_echo(struct sctp_association *asoc)
7698 struct sctp_tmit_chunk *chk;
7700 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7701 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7702 chk->sent = SCTP_DATAGRAM_UNSENT;
7708 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7710 struct sctp_association *asoc;
7711 struct sctp_tmit_chunk *chk;
7712 struct sctp_stream_queue_pending *sp;
7719 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7720 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7721 if (sp->net == net) {
7722 sctp_free_remote_addr(sp->net);
7727 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7728 if (chk->whoTo == net) {
7729 sctp_free_remote_addr(chk->whoTo);
7736 sctp_med_chunk_output(struct sctp_inpcb *inp,
7737 struct sctp_tcb *stcb,
7738 struct sctp_association *asoc,
7741 int control_only, int from_where,
7742 struct timeval *now, int *now_filled, int frag_point, int so_locked
7743 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7749 * Ok this is the generic chunk service queue. we must do the
7750 * following: - Service the stream queue that is next, moving any
7751 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7752 * LAST to the out queue in one pass) and assigning TSN's - Check to
7753 * see if the cwnd/rwnd allows any output, if so we go ahead and
7754 * fomulate and send the low level chunks. Making sure to combine
7755 * any control in the control chunk queue also.
7757 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7758 struct mbuf *outchain, *endoutchain;
7759 struct sctp_tmit_chunk *chk, *nchk;
7761 /* temp arrays for unlinking */
7762 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7763 int no_fragmentflg, error;
7764 unsigned int max_rwnd_per_dest, max_send_per_dest;
7765 int one_chunk, hbflag, skip_data_for_this_net;
7766 int asconf, cookie, no_out_cnt;
7767 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7768 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7770 uint32_t auth_offset = 0;
7771 struct sctp_auth_chunk *auth = NULL;
7772 uint16_t auth_keyid;
7773 int override_ok = 1;
7774 int skip_fill_up = 0;
7775 int data_auth_reqd = 0;
7778 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7784 auth_keyid = stcb->asoc.authinfo.active_keyid;
7786 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7787 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7788 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7793 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7795 * First lets prime the pump. For each destination, if there is room
7796 * in the flight size, attempt to pull an MTU's worth out of the
7797 * stream queues into the general send_queue
7799 #ifdef SCTP_AUDITING_ENABLED
7800 sctp_audit_log(0xC2, 2);
7802 SCTP_TCB_LOCK_ASSERT(stcb);
7804 if ((control_only) || (asoc->stream_reset_outstanding))
7809 /* Nothing to possible to send? */
7810 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7811 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7812 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7813 TAILQ_EMPTY(&asoc->send_queue) &&
7814 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7819 if (asoc->peers_rwnd == 0) {
7820 /* No room in peers rwnd */
7822 if (asoc->total_flight > 0) {
7823 /* we are allowed one chunk in flight */
7827 if (stcb->asoc.ecn_echo_cnt_onq) {
7828 /* Record where a sack goes, if any */
7829 if (no_data_chunks &&
7830 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7831 /* Nothing but ECNe to send - we don't do that */
7832 goto nothing_to_send;
7834 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7835 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7836 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7837 sack_goes_to = chk->whoTo;
7842 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7843 if (stcb->sctp_socket)
7844 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7846 max_send_per_dest = 0;
7847 if (no_data_chunks == 0) {
7848 /* How many non-directed chunks are there? */
7849 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7850 if (chk->whoTo == NULL) {
7852 * We already have non-directed chunks on
7853 * the queue, no need to do a fill-up.
7861 if ((no_data_chunks == 0) &&
7862 (skip_fill_up == 0) &&
7863 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7864 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7866 * This for loop we are in takes in each net, if
7867 * its's got space in cwnd and has data sent to it
7868 * (when CMT is off) then it calls
7869 * sctp_fill_outqueue for the net. This gets data on
7870 * the send queue for that network.
7872 * In sctp_fill_outqueue TSN's are assigned and data is
7873 * copied out of the stream buffers. Note mostly
7874 * copy by reference (we hope).
7876 net->window_probe = 0;
7877 if ((net != stcb->asoc.alternate) &&
7878 ((net->dest_state & SCTP_ADDR_PF) ||
7879 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7880 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7881 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7882 sctp_log_cwnd(stcb, net, 1,
7883 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7887 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7888 (net->flight_size == 0)) {
7889 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7891 if (net->flight_size >= net->cwnd) {
7892 /* skip this network, no room - can't fill */
7893 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7894 sctp_log_cwnd(stcb, net, 3,
7895 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7899 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7900 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7902 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7904 /* memory alloc failure */
7910 /* now service each destination and send out what we can for it */
7911 /* Nothing to send? */
7912 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7913 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7914 TAILQ_EMPTY(&asoc->send_queue)) {
7918 if (asoc->sctp_cmt_on_off > 0) {
7919 /* get the last start point */
7920 start_at = asoc->last_net_cmt_send_started;
7921 if (start_at == NULL) {
7922 /* null so to beginning */
7923 start_at = TAILQ_FIRST(&asoc->nets);
7925 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7926 if (start_at == NULL) {
7927 start_at = TAILQ_FIRST(&asoc->nets);
7930 asoc->last_net_cmt_send_started = start_at;
7932 start_at = TAILQ_FIRST(&asoc->nets);
7934 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7935 if (chk->whoTo == NULL) {
7936 if (asoc->alternate) {
7937 chk->whoTo = asoc->alternate;
7939 chk->whoTo = asoc->primary_destination;
7941 atomic_add_int(&chk->whoTo->ref_count, 1);
7944 old_start_at = NULL;
7945 again_one_more_time:
7946 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7947 /* how much can we send? */
7948 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7949 if (old_start_at && (old_start_at == net)) {
7950 /* through list ocmpletely. */
7954 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7955 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7956 (net->flight_size >= net->cwnd)) {
7958 * Nothing on control or asconf and flight is full,
7959 * we can skip even in the CMT case.
7964 endoutchain = outchain = NULL;
7967 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7968 skip_data_for_this_net = 1;
7970 skip_data_for_this_net = 0;
7972 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7974 * if we have a route and an ifp check to see if we
7975 * have room to send to this guy
7979 ifp = net->ro.ro_rt->rt_ifp;
7980 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7981 SCTP_STAT_INCR(sctps_ifnomemqueued);
7982 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7983 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7988 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7991 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7996 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8006 if (mtu > asoc->peers_rwnd) {
8007 if (asoc->total_flight > 0) {
8008 /* We have a packet in flight somewhere */
8009 r_mtu = asoc->peers_rwnd;
8011 /* We are always allowed to send one MTU out */
8018 /************************/
8019 /* ASCONF transmission */
8020 /************************/
8021 /* Now first lets go through the asconf queue */
8022 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8023 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8026 if (chk->whoTo == NULL) {
8027 if (asoc->alternate == NULL) {
8028 if (asoc->primary_destination != net) {
8032 if (asoc->alternate != net) {
8037 if (chk->whoTo != net) {
8041 if (chk->data == NULL) {
8044 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8045 chk->sent != SCTP_DATAGRAM_RESEND) {
8049 * if no AUTH is yet included and this chunk
8050 * requires it, make sure to account for it. We
8051 * don't apply the size until the AUTH chunk is
8052 * actually added below in case there is no room for
8053 * this chunk. NOTE: we overload the use of "omtu"
8056 if ((auth == NULL) &&
8057 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8058 stcb->asoc.peer_auth_chunks)) {
8059 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8062 /* Here we do NOT factor the r_mtu */
8063 if ((chk->send_size < (int)(mtu - omtu)) ||
8064 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8066 * We probably should glom the mbuf chain
8067 * from the chk->data for control but the
8068 * problem is it becomes yet one more level
8069 * of tracking to do if for some reason
8070 * output fails. Then I have got to
8071 * reconstruct the merged control chain.. el
8072 * yucko.. for now we take the easy way and
8076 * Add an AUTH chunk, if chunk requires it
8077 * save the offset into the chain for AUTH
8079 if ((auth == NULL) &&
8080 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8081 stcb->asoc.peer_auth_chunks))) {
8082 outchain = sctp_add_auth_chunk(outchain,
8087 chk->rec.chunk_id.id);
8088 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8090 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8091 (int)chk->rec.chunk_id.can_take_data,
8092 chk->send_size, chk->copy_by_ref);
8093 if (outchain == NULL) {
8095 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8098 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8099 /* update our MTU size */
8100 if (mtu > (chk->send_size + omtu))
8101 mtu -= (chk->send_size + omtu);
8104 to_out += (chk->send_size + omtu);
8105 /* Do clear IP_DF ? */
8106 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8109 if (chk->rec.chunk_id.can_take_data)
8112 * set hb flag since we can use these for
8118 * should sysctl this: don't bundle data
8119 * with ASCONF since it requires AUTH
8122 chk->sent = SCTP_DATAGRAM_SENT;
8123 if (chk->whoTo == NULL) {
8125 atomic_add_int(&net->ref_count, 1);
8130 * Ok we are out of room but we can
8131 * output without effecting the
8132 * flight size since this little guy
8133 * is a control only packet.
8135 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8137 * do NOT clear the asconf flag as
8138 * it is used to do appropriate
8139 * source address selection.
8141 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8142 (struct sockaddr *)&net->ro._l_addr,
8143 outchain, auth_offset, auth,
8144 stcb->asoc.authinfo.active_keyid,
8145 no_fragmentflg, 0, asconf,
8146 inp->sctp_lport, stcb->rport,
8147 htonl(stcb->asoc.peer_vtag),
8148 net->port, so_locked, NULL, NULL))) {
8149 if (error == ENOBUFS) {
8150 asoc->ifp_had_enobuf = 1;
8151 SCTP_STAT_INCR(sctps_lowlevelerr);
8153 if (from_where == 0) {
8154 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8156 if (*now_filled == 0) {
8157 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8159 *now = net->last_sent_time;
8161 net->last_sent_time = *now;
8164 /* error, could not output */
8165 if (error == EHOSTUNREACH) {
8171 sctp_move_chunks_from_net(stcb, net);
8176 asoc->ifp_had_enobuf = 0;
8177 if (*now_filled == 0) {
8178 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8180 *now = net->last_sent_time;
8182 net->last_sent_time = *now;
8186 * increase the number we sent, if a
8187 * cookie is sent we don't tell them
8190 outchain = endoutchain = NULL;
8194 *num_out += ctl_cnt;
8195 /* recalc a clean slate and setup */
8196 switch (net->ro._l_addr.sa.sa_family) {
8199 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8204 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8217 /************************/
8218 /* Control transmission */
8219 /************************/
8220 /* Now first lets go through the control queue */
8221 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8222 if ((sack_goes_to) &&
8223 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8224 (chk->whoTo != sack_goes_to)) {
8226 * if we have a sack in queue, and we are
8227 * looking at an ecn echo that is NOT queued
8228 * to where the sack is going..
8230 if (chk->whoTo == net) {
8232 * Don't transmit it to where its
8233 * going (current net)
8236 } else if (sack_goes_to == net) {
8238 * But do transmit it to this
8241 goto skip_net_check;
8244 if (chk->whoTo == NULL) {
8245 if (asoc->alternate == NULL) {
8246 if (asoc->primary_destination != net) {
8250 if (asoc->alternate != net) {
8255 if (chk->whoTo != net) {
8260 if (chk->data == NULL) {
8263 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8265 * It must be unsent. Cookies and ASCONF's
8266 * hang around but there timers will force
8267 * when marked for resend.
8272 * if no AUTH is yet included and this chunk
8273 * requires it, make sure to account for it. We
8274 * don't apply the size until the AUTH chunk is
8275 * actually added below in case there is no room for
8276 * this chunk. NOTE: we overload the use of "omtu"
8279 if ((auth == NULL) &&
8280 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8281 stcb->asoc.peer_auth_chunks)) {
8282 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8285 /* Here we do NOT factor the r_mtu */
8286 if ((chk->send_size <= (int)(mtu - omtu)) ||
8287 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8289 * We probably should glom the mbuf chain
8290 * from the chk->data for control but the
8291 * problem is it becomes yet one more level
8292 * of tracking to do if for some reason
8293 * output fails. Then I have got to
8294 * reconstruct the merged control chain.. el
8295 * yucko.. for now we take the easy way and
8299 * Add an AUTH chunk, if chunk requires it
8300 * save the offset into the chain for AUTH
8302 if ((auth == NULL) &&
8303 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8304 stcb->asoc.peer_auth_chunks))) {
8305 outchain = sctp_add_auth_chunk(outchain,
8310 chk->rec.chunk_id.id);
8311 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8313 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8314 (int)chk->rec.chunk_id.can_take_data,
8315 chk->send_size, chk->copy_by_ref);
8316 if (outchain == NULL) {
8318 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8321 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8322 /* update our MTU size */
8323 if (mtu > (chk->send_size + omtu))
8324 mtu -= (chk->send_size + omtu);
8327 to_out += (chk->send_size + omtu);
8328 /* Do clear IP_DF ? */
8329 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8332 if (chk->rec.chunk_id.can_take_data)
8334 /* Mark things to be removed, if needed */
8335 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8336 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8337 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8338 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8339 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8340 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8341 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8342 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8343 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8344 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8345 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8346 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8349 /* remove these chunks at the end */
8350 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8351 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8352 /* turn off the timer */
8353 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8354 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8355 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8361 * Other chunks, since they have
8362 * timers running (i.e. COOKIE) we
8363 * just "trust" that it gets sent or
8367 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8370 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8372 * Increment ecne send count
8373 * here this means we may be
8374 * over-zealous in our
8375 * counting if the send
8376 * fails, but its the best
8377 * place to do it (we used
8378 * to do it in the queue of
8379 * the chunk, but that did
8380 * not tell how many times
8383 SCTP_STAT_INCR(sctps_sendecne);
8385 chk->sent = SCTP_DATAGRAM_SENT;
8386 if (chk->whoTo == NULL) {
8388 atomic_add_int(&net->ref_count, 1);
8394 * Ok we are out of room but we can
8395 * output without effecting the
8396 * flight size since this little guy
8397 * is a control only packet.
8400 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8402 * do NOT clear the asconf
8403 * flag as it is used to do
8404 * appropriate source
8405 * address selection.
8409 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8412 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8413 (struct sockaddr *)&net->ro._l_addr,
8416 stcb->asoc.authinfo.active_keyid,
8417 no_fragmentflg, 0, asconf,
8418 inp->sctp_lport, stcb->rport,
8419 htonl(stcb->asoc.peer_vtag),
8420 net->port, so_locked, NULL, NULL))) {
8421 if (error == ENOBUFS) {
8422 asoc->ifp_had_enobuf = 1;
8423 SCTP_STAT_INCR(sctps_lowlevelerr);
8425 if (from_where == 0) {
8426 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8428 /* error, could not output */
8430 if (*now_filled == 0) {
8431 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8433 *now = net->last_sent_time;
8435 net->last_sent_time = *now;
8439 if (error == EHOSTUNREACH) {
8445 sctp_move_chunks_from_net(stcb, net);
8450 asoc->ifp_had_enobuf = 0;
8451 /* Only HB or ASCONF advances time */
8453 if (*now_filled == 0) {
8454 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8456 *now = net->last_sent_time;
8458 net->last_sent_time = *now;
8463 * increase the number we sent, if a
8464 * cookie is sent we don't tell them
8467 outchain = endoutchain = NULL;
8471 *num_out += ctl_cnt;
8472 /* recalc a clean slate and setup */
8473 switch (net->ro._l_addr.sa.sa_family) {
8476 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8481 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8494 /* JRI: if dest is in PF state, do not send data to it */
8495 if ((asoc->sctp_cmt_on_off > 0) &&
8496 (net != stcb->asoc.alternate) &&
8497 (net->dest_state & SCTP_ADDR_PF)) {
8500 if (net->flight_size >= net->cwnd) {
8503 if ((asoc->sctp_cmt_on_off > 0) &&
8504 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8505 (net->flight_size > max_rwnd_per_dest)) {
8509 * We need a specific accounting for the usage of the send
8510 * buffer. We also need to check the number of messages per
8511 * net. For now, this is better than nothing and it disabled
8514 if ((asoc->sctp_cmt_on_off > 0) &&
8515 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8516 (max_send_per_dest > 0) &&
8517 (net->flight_size > max_send_per_dest)) {
8520 /*********************/
8521 /* Data transmission */
8522 /*********************/
8524 * if AUTH for DATA is required and no AUTH has been added
8525 * yet, account for this in the mtu now... if no data can be
8526 * bundled, this adjustment won't matter anyways since the
8527 * packet will be going out...
8529 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8530 stcb->asoc.peer_auth_chunks);
8531 if (data_auth_reqd && (auth == NULL)) {
8532 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8534 /* now lets add any data within the MTU constraints */
8535 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8537 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8538 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8544 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8545 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8555 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8556 (skip_data_for_this_net == 0)) ||
8558 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8559 if (no_data_chunks) {
8560 /* let only control go out */
8564 if (net->flight_size >= net->cwnd) {
8565 /* skip this net, no room for data */
8569 if ((chk->whoTo != NULL) &&
8570 (chk->whoTo != net)) {
8571 /* Don't send the chunk on this net */
8574 if (asoc->sctp_cmt_on_off == 0) {
8575 if ((asoc->alternate) &&
8576 (asoc->alternate != net) &&
8577 (chk->whoTo == NULL)) {
8579 } else if ((net != asoc->primary_destination) &&
8580 (asoc->alternate == NULL) &&
8581 (chk->whoTo == NULL)) {
8585 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8587 * strange, we have a chunk that is
8588 * to big for its destination and
8589 * yet no fragment ok flag.
8590 * Something went wrong when the
8591 * PMTU changed...we did not mark
8592 * this chunk for some reason?? I
8593 * will fix it here by letting IP
8594 * fragment it for now and printing
8595 * a warning. This really should not
8598 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8599 chk->send_size, mtu);
8600 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8602 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8603 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8604 struct sctp_data_chunk *dchkh;
8606 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8607 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8609 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8610 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8611 /* ok we will add this one */
8614 * Add an AUTH chunk, if chunk
8615 * requires it, save the offset into
8616 * the chain for AUTH
8618 if (data_auth_reqd) {
8620 outchain = sctp_add_auth_chunk(outchain,
8626 auth_keyid = chk->auth_keyid;
8628 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8629 } else if (override_ok) {
8634 auth_keyid = chk->auth_keyid;
8636 } else if (auth_keyid != chk->auth_keyid) {
8644 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8645 chk->send_size, chk->copy_by_ref);
8646 if (outchain == NULL) {
8647 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8648 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8649 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8652 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8655 /* upate our MTU size */
8656 /* Do clear IP_DF ? */
8657 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8660 /* unsigned subtraction of mtu */
8661 if (mtu > chk->send_size)
8662 mtu -= chk->send_size;
8665 /* unsigned subtraction of r_mtu */
8666 if (r_mtu > chk->send_size)
8667 r_mtu -= chk->send_size;
8671 to_out += chk->send_size;
8672 if ((to_out > mx_mtu) && no_fragmentflg) {
8674 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8676 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8680 chk->window_probe = 0;
8681 data_list[bundle_at++] = chk;
8682 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8685 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8686 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8687 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8689 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8691 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8692 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8702 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8704 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8705 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8706 data_list[0]->window_probe = 1;
8707 net->window_probe = 1;
8713 * Must be sent in order of the
8714 * TSN's (on a network)
8718 } /* for (chunk gather loop for this net) */
8719 } /* if asoc.state OPEN */
8721 /* Is there something to send for this destination? */
8723 /* We may need to start a control timer or two */
8725 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8728 * do NOT clear the asconf flag as it is
8729 * used to do appropriate source address
8734 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8737 /* must start a send timer if data is being sent */
8738 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8740 * no timer running on this destination
8743 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8745 /* Now send it, if there is anything to send :> */
8746 if ((error = sctp_lowlevel_chunk_output(inp,
8749 (struct sockaddr *)&net->ro._l_addr,
8757 inp->sctp_lport, stcb->rport,
8758 htonl(stcb->asoc.peer_vtag),
8759 net->port, so_locked, NULL, NULL))) {
8760 /* error, we could not output */
8761 if (error == ENOBUFS) {
8762 SCTP_STAT_INCR(sctps_lowlevelerr);
8763 asoc->ifp_had_enobuf = 1;
8765 if (from_where == 0) {
8766 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8768 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8770 if (*now_filled == 0) {
8771 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8773 *now = net->last_sent_time;
8775 net->last_sent_time = *now;
8779 if (error == EHOSTUNREACH) {
8781 * Destination went unreachable
8784 sctp_move_chunks_from_net(stcb, net);
8788 * I add this line to be paranoid. As far as
8789 * I can tell the continue, takes us back to
8790 * the top of the for, but just to make sure
8791 * I will reset these again here.
8793 ctl_cnt = bundle_at = 0;
8794 continue; /* This takes us back to the
8795 * for() for the nets. */
8797 asoc->ifp_had_enobuf = 0;
8802 if (bundle_at || hbflag) {
8803 /* For data/asconf and hb set time */
8804 if (*now_filled == 0) {
8805 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8807 *now = net->last_sent_time;
8809 net->last_sent_time = *now;
8813 *num_out += (ctl_cnt + bundle_at);
8816 /* setup for a RTO measurement */
8817 tsns_sent = data_list[0]->rec.data.TSN_seq;
8818 /* fill time if not already filled */
8819 if (*now_filled == 0) {
8820 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8822 *now = asoc->time_last_sent;
8824 asoc->time_last_sent = *now;
8826 if (net->rto_needed) {
8827 data_list[0]->do_rtt = 1;
8828 net->rto_needed = 0;
8830 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8831 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8837 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8838 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8841 if (old_start_at == NULL) {
8842 old_start_at = start_at;
8843 start_at = TAILQ_FIRST(&asoc->nets);
8845 goto again_one_more_time;
8848 * At the end there should be no NON timed chunks hanging on this
8851 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8852 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8854 if ((*num_out == 0) && (*reason_code == 0)) {
8859 sctp_clean_up_ctl(stcb, asoc, so_locked);
8864 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8867 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8868 * the control chunk queue.
8870 struct sctp_chunkhdr *hdr;
8871 struct sctp_tmit_chunk *chk;
8874 SCTP_TCB_LOCK_ASSERT(stcb);
8875 sctp_alloc_a_chunk(stcb, chk);
8878 sctp_m_freem(op_err);
8881 chk->copy_by_ref = 0;
8882 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8883 if (op_err == NULL) {
8884 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8889 while (mat != NULL) {
8890 chk->send_size += SCTP_BUF_LEN(mat);
8891 mat = SCTP_BUF_NEXT(mat);
8893 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8894 chk->rec.chunk_id.can_take_data = 1;
8895 chk->sent = SCTP_DATAGRAM_UNSENT;
8898 chk->asoc = &stcb->asoc;
8901 hdr = mtod(op_err, struct sctp_chunkhdr *);
8902 hdr->chunk_type = SCTP_OPERATION_ERROR;
8903 hdr->chunk_flags = 0;
8904 hdr->chunk_length = htons(chk->send_size);
8905 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8908 chk->asoc->ctrl_queue_cnt++;
8912 sctp_send_cookie_echo(struct mbuf *m,
8914 struct sctp_tcb *stcb,
8915 struct sctp_nets *net)
8918 * pull out the cookie and put it at the front of the control chunk
8922 struct mbuf *cookie;
8923 struct sctp_paramhdr parm, *phdr;
8924 struct sctp_chunkhdr *hdr;
8925 struct sctp_tmit_chunk *chk;
8926 uint16_t ptype, plen;
8928 /* First find the cookie in the param area */
8930 at = offset + sizeof(struct sctp_init_chunk);
8932 SCTP_TCB_LOCK_ASSERT(stcb);
8934 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8938 ptype = ntohs(phdr->param_type);
8939 plen = ntohs(phdr->param_length);
8940 if (ptype == SCTP_STATE_COOKIE) {
8943 /* found the cookie */
8944 if ((pad = (plen % 4))) {
8947 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8948 if (cookie == NULL) {
8952 #ifdef SCTP_MBUF_LOGGING
8953 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8958 if (SCTP_BUF_IS_EXTENDED(mat)) {
8959 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8961 mat = SCTP_BUF_NEXT(mat);
8967 at += SCTP_SIZE32(plen);
8969 if (cookie == NULL) {
8970 /* Did not find the cookie */
8973 /* ok, we got the cookie lets change it into a cookie echo chunk */
8975 /* first the change from param to cookie */
8976 hdr = mtod(cookie, struct sctp_chunkhdr *);
8977 hdr->chunk_type = SCTP_COOKIE_ECHO;
8978 hdr->chunk_flags = 0;
8979 /* get the chunk stuff now and place it in the FRONT of the queue */
8980 sctp_alloc_a_chunk(stcb, chk);
8983 sctp_m_freem(cookie);
8986 chk->copy_by_ref = 0;
8987 chk->send_size = plen;
8988 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8989 chk->rec.chunk_id.can_take_data = 0;
8990 chk->sent = SCTP_DATAGRAM_UNSENT;
8992 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8993 chk->asoc = &stcb->asoc;
8996 atomic_add_int(&chk->whoTo->ref_count, 1);
8997 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8998 chk->asoc->ctrl_queue_cnt++;
9003 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
9007 struct sctp_nets *net)
9010 * take a HB request and make it into a HB ack and send it.
9012 struct mbuf *outchain;
9013 struct sctp_chunkhdr *chdr;
9014 struct sctp_tmit_chunk *chk;
9018 /* must have a net pointer */
9021 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
9022 if (outchain == NULL) {
9023 /* gak out of memory */
9026 #ifdef SCTP_MBUF_LOGGING
9027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9032 if (SCTP_BUF_IS_EXTENDED(mat)) {
9033 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9035 mat = SCTP_BUF_NEXT(mat);
9039 chdr = mtod(outchain, struct sctp_chunkhdr *);
9040 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9041 chdr->chunk_flags = 0;
9042 if (chk_length % 4) {
9044 uint32_t cpthis = 0;
9047 padlen = 4 - (chk_length % 4);
9048 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9050 sctp_alloc_a_chunk(stcb, chk);
9053 sctp_m_freem(outchain);
9056 chk->copy_by_ref = 0;
9057 chk->send_size = chk_length;
9058 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9059 chk->rec.chunk_id.can_take_data = 1;
9060 chk->sent = SCTP_DATAGRAM_UNSENT;
9063 chk->asoc = &stcb->asoc;
9064 chk->data = outchain;
9066 atomic_add_int(&chk->whoTo->ref_count, 1);
9067 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9068 chk->asoc->ctrl_queue_cnt++;
9072 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9074 /* formulate and queue a cookie-ack back to sender */
9075 struct mbuf *cookie_ack;
9076 struct sctp_chunkhdr *hdr;
9077 struct sctp_tmit_chunk *chk;
9080 SCTP_TCB_LOCK_ASSERT(stcb);
9082 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
9083 if (cookie_ack == NULL) {
9087 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9088 sctp_alloc_a_chunk(stcb, chk);
9091 sctp_m_freem(cookie_ack);
9094 chk->copy_by_ref = 0;
9095 chk->send_size = sizeof(struct sctp_chunkhdr);
9096 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9097 chk->rec.chunk_id.can_take_data = 1;
9098 chk->sent = SCTP_DATAGRAM_UNSENT;
9101 chk->asoc = &stcb->asoc;
9102 chk->data = cookie_ack;
9103 if (chk->asoc->last_control_chunk_from != NULL) {
9104 chk->whoTo = chk->asoc->last_control_chunk_from;
9105 atomic_add_int(&chk->whoTo->ref_count, 1);
9109 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9110 hdr->chunk_type = SCTP_COOKIE_ACK;
9111 hdr->chunk_flags = 0;
9112 hdr->chunk_length = htons(chk->send_size);
9113 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9114 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9115 chk->asoc->ctrl_queue_cnt++;
9121 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9123 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9124 struct mbuf *m_shutdown_ack;
9125 struct sctp_shutdown_ack_chunk *ack_cp;
9126 struct sctp_tmit_chunk *chk;
9128 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9129 if (m_shutdown_ack == NULL) {
9133 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9134 sctp_alloc_a_chunk(stcb, chk);
9137 sctp_m_freem(m_shutdown_ack);
9140 chk->copy_by_ref = 0;
9141 chk->send_size = sizeof(struct sctp_chunkhdr);
9142 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9143 chk->rec.chunk_id.can_take_data = 1;
9144 chk->sent = SCTP_DATAGRAM_UNSENT;
9147 chk->asoc = &stcb->asoc;
9148 chk->data = m_shutdown_ack;
9151 atomic_add_int(&chk->whoTo->ref_count, 1);
9153 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9154 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9155 ack_cp->ch.chunk_flags = 0;
9156 ack_cp->ch.chunk_length = htons(chk->send_size);
9157 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9158 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9159 chk->asoc->ctrl_queue_cnt++;
9164 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9166 /* formulate and queue a SHUTDOWN to the sender */
9167 struct mbuf *m_shutdown;
9168 struct sctp_shutdown_chunk *shutdown_cp;
9169 struct sctp_tmit_chunk *chk;
9171 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9172 if (m_shutdown == NULL) {
9176 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9177 sctp_alloc_a_chunk(stcb, chk);
9180 sctp_m_freem(m_shutdown);
9183 chk->copy_by_ref = 0;
9184 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9185 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9186 chk->rec.chunk_id.can_take_data = 1;
9187 chk->sent = SCTP_DATAGRAM_UNSENT;
9190 chk->asoc = &stcb->asoc;
9191 chk->data = m_shutdown;
9194 atomic_add_int(&chk->whoTo->ref_count, 1);
9196 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9197 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9198 shutdown_cp->ch.chunk_flags = 0;
9199 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9200 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9201 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9202 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9203 chk->asoc->ctrl_queue_cnt++;
9208 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9211 * formulate and queue an ASCONF to the peer. ASCONF parameters
9212 * should be queued on the assoc queue.
9214 struct sctp_tmit_chunk *chk;
9215 struct mbuf *m_asconf;
9218 SCTP_TCB_LOCK_ASSERT(stcb);
9220 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9221 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9222 /* can't send a new one if there is one in flight already */
9225 /* compose an ASCONF chunk, maximum length is PMTU */
9226 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9227 if (m_asconf == NULL) {
9230 sctp_alloc_a_chunk(stcb, chk);
9233 sctp_m_freem(m_asconf);
9236 chk->copy_by_ref = 0;
9237 chk->data = m_asconf;
9238 chk->send_size = len;
9239 chk->rec.chunk_id.id = SCTP_ASCONF;
9240 chk->rec.chunk_id.can_take_data = 0;
9241 chk->sent = SCTP_DATAGRAM_UNSENT;
9243 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9244 chk->asoc = &stcb->asoc;
9247 atomic_add_int(&chk->whoTo->ref_count, 1);
9249 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9250 chk->asoc->ctrl_queue_cnt++;
9255 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9258 * formulate and queue a asconf-ack back to sender. the asconf-ack
9259 * must be stored in the tcb.
9261 struct sctp_tmit_chunk *chk;
9262 struct sctp_asconf_ack *ack, *latest_ack;
9264 struct sctp_nets *net = NULL;
9266 SCTP_TCB_LOCK_ASSERT(stcb);
9267 /* Get the latest ASCONF-ACK */
9268 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9269 if (latest_ack == NULL) {
9272 if (latest_ack->last_sent_to != NULL &&
9273 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9274 /* we're doing a retransmission */
9275 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9278 if (stcb->asoc.last_control_chunk_from == NULL) {
9279 if (stcb->asoc.alternate) {
9280 net = stcb->asoc.alternate;
9282 net = stcb->asoc.primary_destination;
9285 net = stcb->asoc.last_control_chunk_from;
9290 if (stcb->asoc.last_control_chunk_from == NULL) {
9291 if (stcb->asoc.alternate) {
9292 net = stcb->asoc.alternate;
9294 net = stcb->asoc.primary_destination;
9297 net = stcb->asoc.last_control_chunk_from;
9300 latest_ack->last_sent_to = net;
9302 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9303 if (ack->data == NULL) {
9306 /* copy the asconf_ack */
9307 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9308 if (m_ack == NULL) {
9309 /* couldn't copy it */
9312 #ifdef SCTP_MBUF_LOGGING
9313 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9318 if (SCTP_BUF_IS_EXTENDED(mat)) {
9319 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9321 mat = SCTP_BUF_NEXT(mat);
9326 sctp_alloc_a_chunk(stcb, chk);
9330 sctp_m_freem(m_ack);
9333 chk->copy_by_ref = 0;
9337 atomic_add_int(&chk->whoTo->ref_count, 1);
9342 chk->send_size = ack->len;
9343 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9344 chk->rec.chunk_id.can_take_data = 1;
9345 chk->sent = SCTP_DATAGRAM_UNSENT;
9347 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9348 chk->asoc = &stcb->asoc;
9350 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9351 chk->asoc->ctrl_queue_cnt++;
9358 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9359 struct sctp_tcb *stcb,
9360 struct sctp_association *asoc,
9361 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9362 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9368 * send out one MTU of retransmission. If fast_retransmit is
9369 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9370 * rwnd. For a Cookie or Asconf in the control chunk queue we
9371 * retransmit them by themselves.
9373 * For data chunks we will pick out the lowest TSN's in the sent_queue
9374 * marked for resend and bundle them all together (up to a MTU of
9375 * destination). The address to send to should have been
9376 * selected/changed where the retransmission was marked (i.e. in FR
9377 * or t3-timeout routines).
9379 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9380 struct sctp_tmit_chunk *chk, *fwd;
9381 struct mbuf *m, *endofchain;
9382 struct sctp_nets *net = NULL;
9383 uint32_t tsns_sent = 0;
9384 int no_fragmentflg, bundle_at, cnt_thru;
9386 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9387 struct sctp_auth_chunk *auth = NULL;
9388 uint32_t auth_offset = 0;
9389 uint16_t auth_keyid;
9390 int override_ok = 1;
9391 int data_auth_reqd = 0;
9394 SCTP_TCB_LOCK_ASSERT(stcb);
9395 tmr_started = ctl_cnt = bundle_at = error = 0;
9400 endofchain = m = NULL;
9401 auth_keyid = stcb->asoc.authinfo.active_keyid;
9402 #ifdef SCTP_AUDITING_ENABLED
9403 sctp_audit_log(0xC3, 1);
9405 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9406 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9407 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9408 asoc->sent_queue_retran_cnt);
9409 asoc->sent_queue_cnt = 0;
9410 asoc->sent_queue_cnt_removeable = 0;
9411 /* send back 0/0 so we enter normal transmission */
9415 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9416 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9417 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9418 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9419 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9422 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9423 if (chk != asoc->str_reset) {
9425 * not eligible for retran if its
9432 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9436 * Add an AUTH chunk, if chunk requires it save the
9437 * offset into the chain for AUTH
9439 if ((auth == NULL) &&
9440 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9441 stcb->asoc.peer_auth_chunks))) {
9442 m = sctp_add_auth_chunk(m, &endofchain,
9443 &auth, &auth_offset,
9445 chk->rec.chunk_id.id);
9446 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9448 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9454 /* do we have control chunks to retransmit? */
9456 /* Start a timer no matter if we suceed or fail */
9457 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9458 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9459 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9460 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9461 chk->snd_count++; /* update our count */
9462 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9463 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9464 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9465 no_fragmentflg, 0, 0,
9466 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9467 chk->whoTo->port, so_locked, NULL, NULL))) {
9468 SCTP_STAT_INCR(sctps_lowlevelerr);
9475 * We don't want to mark the net->sent time here since this
9476 * we use this for HB and retrans cannot measure RTT
9478 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9480 chk->sent = SCTP_DATAGRAM_SENT;
9481 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9485 /* Clean up the fwd-tsn list */
9486 sctp_clean_up_ctl(stcb, asoc, so_locked);
9491 * Ok, it is just data retransmission we need to do or that and a
9492 * fwd-tsn with it all.
9494 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9495 return (SCTP_RETRAN_DONE);
9497 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9498 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9499 /* not yet open, resend the cookie and that is it */
9502 #ifdef SCTP_AUDITING_ENABLED
9503 sctp_auditing(20, inp, stcb, NULL);
9505 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9506 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9507 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9508 /* No, not sent to this net or not ready for rtx */
9511 if (chk->data == NULL) {
9512 printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9513 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9516 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9517 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9518 /* Gak, we have exceeded max unlucky retran, abort! */
9519 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9521 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9522 atomic_add_int(&stcb->asoc.refcnt, 1);
9523 sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked);
9524 SCTP_TCB_LOCK(stcb);
9525 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9526 return (SCTP_RETRAN_EXIT);
9528 /* pick up the net */
9530 switch (net->ro._l_addr.sa.sa_family) {
9533 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9538 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9547 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9548 /* No room in peers rwnd */
9551 tsn = asoc->last_acked_seq + 1;
9552 if (tsn == chk->rec.data.TSN_seq) {
9554 * we make a special exception for this
9555 * case. The peer has no rwnd but is missing
9556 * the lowest chunk.. which is probably what
9557 * is holding up the rwnd.
9559 goto one_chunk_around;
9564 if (asoc->peers_rwnd < mtu) {
9566 if ((asoc->peers_rwnd == 0) &&
9567 (asoc->total_flight == 0)) {
9568 chk->window_probe = 1;
9569 chk->whoTo->window_probe = 1;
9572 #ifdef SCTP_AUDITING_ENABLED
9573 sctp_audit_log(0xC3, 2);
9577 net->fast_retran_ip = 0;
9578 if (chk->rec.data.doing_fast_retransmit == 0) {
9580 * if no FR in progress skip destination that have
9581 * flight_size > cwnd.
9583 if (net->flight_size >= net->cwnd) {
9588 * Mark the destination net to have FR recovery
9592 net->fast_retran_ip = 1;
9596 * if no AUTH is yet included and this chunk requires it,
9597 * make sure to account for it. We don't apply the size
9598 * until the AUTH chunk is actually added below in case
9599 * there is no room for this chunk.
9601 if (data_auth_reqd && (auth == NULL)) {
9602 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9606 if ((chk->send_size <= (mtu - dmtu)) ||
9607 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9608 /* ok we will add this one */
9609 if (data_auth_reqd) {
9611 m = sctp_add_auth_chunk(m,
9617 auth_keyid = chk->auth_keyid;
9619 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9620 } else if (override_ok) {
9621 auth_keyid = chk->auth_keyid;
9623 } else if (chk->auth_keyid != auth_keyid) {
9624 /* different keyid, so done bundling */
9628 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9630 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9633 /* Do clear IP_DF ? */
9634 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9637 /* upate our MTU size */
9638 if (mtu > (chk->send_size + dmtu))
9639 mtu -= (chk->send_size + dmtu);
9642 data_list[bundle_at++] = chk;
9643 if (one_chunk && (asoc->total_flight <= 0)) {
9644 SCTP_STAT_INCR(sctps_windowprobed);
9647 if (one_chunk == 0) {
9649 * now are there anymore forward from chk to pick
9652 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9653 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9654 /* Nope, not for retran */
9657 if (fwd->whoTo != net) {
9658 /* Nope, not the net in question */
9661 if (data_auth_reqd && (auth == NULL)) {
9662 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9665 if (fwd->send_size <= (mtu - dmtu)) {
9666 if (data_auth_reqd) {
9668 m = sctp_add_auth_chunk(m,
9674 auth_keyid = fwd->auth_keyid;
9676 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9677 } else if (override_ok) {
9678 auth_keyid = fwd->auth_keyid;
9680 } else if (fwd->auth_keyid != auth_keyid) {
9688 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9690 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9693 /* Do clear IP_DF ? */
9694 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9697 /* upate our MTU size */
9698 if (mtu > (fwd->send_size + dmtu))
9699 mtu -= (fwd->send_size + dmtu);
9702 data_list[bundle_at++] = fwd;
9703 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9707 /* can't fit so we are done */
9712 /* Is there something to send for this destination? */
9715 * No matter if we fail/or suceed we should start a
9716 * timer. A failure is like a lost IP packet :-)
9718 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9720 * no timer running on this destination
9723 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9726 /* Now lets send it, if there is anything to send :> */
9727 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9728 (struct sockaddr *)&net->ro._l_addr, m,
9729 auth_offset, auth, auth_keyid,
9730 no_fragmentflg, 0, 0,
9731 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9732 net->port, so_locked, NULL, NULL))) {
9733 /* error, we could not output */
9734 SCTP_STAT_INCR(sctps_lowlevelerr);
9742 * We don't want to mark the net->sent time here
9743 * since this we use this for HB and retrans cannot
9746 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9748 /* For auto-close */
9750 if (*now_filled == 0) {
9751 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9752 *now = asoc->time_last_sent;
9755 asoc->time_last_sent = *now;
9757 *cnt_out += bundle_at;
9758 #ifdef SCTP_AUDITING_ENABLED
9759 sctp_audit_log(0xC4, bundle_at);
9762 tsns_sent = data_list[0]->rec.data.TSN_seq;
9764 for (i = 0; i < bundle_at; i++) {
9765 SCTP_STAT_INCR(sctps_sendretransdata);
9766 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9768 * When we have a revoked data, and we
9769 * retransmit it, then we clear the revoked
9770 * flag since this flag dictates if we
9771 * subtracted from the fs
9773 if (data_list[i]->rec.data.chunk_was_revoked) {
9774 /* Deflate the cwnd */
9775 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9776 data_list[i]->rec.data.chunk_was_revoked = 0;
9778 data_list[i]->snd_count++;
9779 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9780 /* record the time */
9781 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9782 if (data_list[i]->book_size_scale) {
9784 * need to double the book size on
9787 data_list[i]->book_size_scale = 0;
9789 * Since we double the booksize, we
9790 * must also double the output queue
9791 * size, since this get shrunk when
9792 * we free by this amount.
9794 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9795 data_list[i]->book_size *= 2;
9799 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9800 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9801 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9803 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9804 (uint32_t) (data_list[i]->send_size +
9805 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9807 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9808 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9809 data_list[i]->whoTo->flight_size,
9810 data_list[i]->book_size,
9811 (uintptr_t) data_list[i]->whoTo,
9812 data_list[i]->rec.data.TSN_seq);
9814 sctp_flight_size_increase(data_list[i]);
9815 sctp_total_flight_increase(stcb, data_list[i]);
9816 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9817 /* SWS sender side engages */
9818 asoc->peers_rwnd = 0;
9821 (data_list[i]->rec.data.doing_fast_retransmit)) {
9822 SCTP_STAT_INCR(sctps_sendfastretrans);
9823 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9824 (tmr_started == 0)) {
9826 * ok we just fast-retrans'd
9827 * the lowest TSN, i.e the
9828 * first on the list. In
9829 * this case we want to give
9830 * some more time to get a
9831 * SACK back without a
9834 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9835 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9836 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9840 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9841 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9843 #ifdef SCTP_AUDITING_ENABLED
9844 sctp_auditing(21, inp, stcb, NULL);
9850 if (asoc->sent_queue_retran_cnt <= 0) {
9851 /* all done we have no more to retran */
9852 asoc->sent_queue_retran_cnt = 0;
9856 /* No more room in rwnd */
9859 /* stop the for loop here. we sent out a packet */
9866 sctp_timer_validation(struct sctp_inpcb *inp,
9867 struct sctp_tcb *stcb,
9868 struct sctp_association *asoc)
9870 struct sctp_nets *net;
9872 /* Validate that a timer is running somewhere */
9873 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9874 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9875 /* Here is a timer */
9879 SCTP_TCB_LOCK_ASSERT(stcb);
9880 /* Gak, we did not have a timer somewhere */
9881 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9882 if (asoc->alternate) {
9883 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9885 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9891 sctp_chunk_output(struct sctp_inpcb *inp,
9892 struct sctp_tcb *stcb,
9895 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9901 * Ok this is the generic chunk service queue. we must do the
9903 * - See if there are retransmits pending, if so we must
9905 * - Service the stream queue that is next, moving any
9906 * message (note I must get a complete message i.e.
9907 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9909 * - Check to see if the cwnd/rwnd allows any output, if so we
9910 * go ahead and fomulate and send the low level chunks. Making sure
9911 * to combine any control in the control chunk queue also.
9913 struct sctp_association *asoc;
9914 struct sctp_nets *net;
9915 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9916 unsigned int burst_cnt = 0;
9920 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9923 unsigned int tot_frs = 0;
9926 /* The Nagle algorithm is only applied when handling a send call. */
9927 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9928 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9936 SCTP_TCB_LOCK_ASSERT(stcb);
9938 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9940 if ((un_sent <= 0) &&
9941 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9942 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9943 (asoc->sent_queue_retran_cnt == 0)) {
9944 /* Nothing to do unless there is something to be sent left */
9948 * Do we have something to send, data or control AND a sack timer
9949 * running, if so piggy-back the sack.
9951 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9952 sctp_send_sack(stcb, so_locked);
9953 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9955 while (asoc->sent_queue_retran_cnt) {
9957 * Ok, it is retransmission time only, we send out only ONE
9958 * packet with a single call off to the retran code.
9960 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9962 * Special hook for handling cookiess discarded
9963 * by peer that carried data. Send cookie-ack only
9964 * and then the next call with get the retran's.
9966 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9968 &now, &now_filled, frag_point, so_locked);
9970 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9971 /* if its not from a HB then do it */
9973 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9979 * its from any other place, we don't allow retran
9980 * output (only control)
9985 /* Can't send anymore */
9987 * now lets push out control by calling med-level
9988 * output once. this assures that we WILL send HB's
9991 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9993 &now, &now_filled, frag_point, so_locked);
9994 #ifdef SCTP_AUDITING_ENABLED
9995 sctp_auditing(8, inp, stcb, NULL);
9997 sctp_timer_validation(inp, stcb, asoc);
10002 * The count was off.. retran is not happening so do
10003 * the normal retransmission.
10005 #ifdef SCTP_AUDITING_ENABLED
10006 sctp_auditing(9, inp, stcb, NULL);
10008 if (ret == SCTP_RETRAN_EXIT) {
10013 if (from_where == SCTP_OUTPUT_FROM_T3) {
10014 /* Only one transmission allowed out of a timeout */
10015 #ifdef SCTP_AUDITING_ENABLED
10016 sctp_auditing(10, inp, stcb, NULL);
10018 /* Push out any control */
10019 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10020 &now, &now_filled, frag_point, so_locked);
10023 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10024 /* Hit FR burst limit */
10027 if ((num_out == 0) && (ret == 0)) {
10028 /* No more retrans to send */
10032 #ifdef SCTP_AUDITING_ENABLED
10033 sctp_auditing(12, inp, stcb, NULL);
10035 /* Check for bad destinations, if they exist move chunks around. */
10036 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10037 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10039 * if possible move things off of this address we
10040 * still may send below due to the dormant state but
10041 * we try to find an alternate address to send to
10042 * and if we have one we move all queued data on the
10043 * out wheel to this alternate address.
10045 if (net->ref_count > 1)
10046 sctp_move_chunks_from_net(stcb, net);
10049 * if ((asoc->sat_network) || (net->addr_is_local))
10050 * { burst_limit = asoc->max_burst *
10051 * SCTP_SAT_NETWORK_BURST_INCR; }
10053 if (asoc->max_burst > 0) {
10054 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10055 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10057 * JRS - Use the congestion
10058 * control given in the
10059 * congestion control module
10061 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10062 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10063 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10065 SCTP_STAT_INCR(sctps_maxburstqueued);
10067 net->fast_retran_ip = 0;
10069 if (net->flight_size == 0) {
10071 * Should be decaying the
10083 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10084 &reason_code, 0, from_where,
10085 &now, &now_filled, frag_point, so_locked);
10087 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10088 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10089 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10091 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10092 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10093 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10097 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10099 tot_out += num_out;
10101 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10102 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10103 if (num_out == 0) {
10104 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10109 * When the Nagle algorithm is used, look at how
10110 * much is unsent, then if its smaller than an MTU
10111 * and we have data in flight we stop, except if we
10112 * are handling a fragmented user message.
10114 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10115 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10116 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10117 (stcb->asoc.total_flight > 0) &&
10118 ((stcb->asoc.locked_on_sending == NULL) ||
10119 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10123 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10124 TAILQ_EMPTY(&asoc->send_queue) &&
10125 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10126 /* Nothing left to send */
10129 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10130 /* Nothing left to send */
10133 } while (num_out &&
10134 ((asoc->max_burst == 0) ||
10135 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10136 (burst_cnt < asoc->max_burst)));
10138 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10139 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10140 SCTP_STAT_INCR(sctps_maxburstqueued);
10141 asoc->burst_limit_applied = 1;
10142 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10143 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10146 asoc->burst_limit_applied = 0;
10149 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10150 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10152 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10156 * Now we need to clean up the control chunk chain if a ECNE is on
10157 * it. It must be marked as UNSENT again so next call will continue
10158 * to send it until such time that we get a CWR, to remove it.
10160 if (stcb->asoc.ecn_echo_cnt_onq)
10161 sctp_fix_ecn_echo(asoc);
10168 struct sctp_inpcb *inp,
10170 struct sockaddr *addr,
10171 struct mbuf *control,
10176 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10179 if (inp->sctp_socket == NULL) {
10180 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10183 return (sctp_sosend(inp->sctp_socket,
10185 (struct uio *)NULL,
10193 send_forward_tsn(struct sctp_tcb *stcb,
10194 struct sctp_association *asoc)
10196 struct sctp_tmit_chunk *chk;
10197 struct sctp_forward_tsn_chunk *fwdtsn;
10198 uint32_t advance_peer_ack_point;
10200 SCTP_TCB_LOCK_ASSERT(stcb);
10201 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10202 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10203 /* mark it to unsent */
10204 chk->sent = SCTP_DATAGRAM_UNSENT;
10205 chk->snd_count = 0;
10206 /* Do we correct its output location? */
10208 sctp_free_remote_addr(chk->whoTo);
10211 goto sctp_fill_in_rest;
10214 /* Ok if we reach here we must build one */
10215 sctp_alloc_a_chunk(stcb, chk);
10219 asoc->fwd_tsn_cnt++;
10220 chk->copy_by_ref = 0;
10221 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10222 chk->rec.chunk_id.can_take_data = 0;
10225 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10226 if (chk->data == NULL) {
10227 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10230 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10231 chk->sent = SCTP_DATAGRAM_UNSENT;
10232 chk->snd_count = 0;
10233 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10234 asoc->ctrl_queue_cnt++;
10237 * Here we go through and fill out the part that deals with
10238 * stream/seq of the ones we skip.
10240 SCTP_BUF_LEN(chk->data) = 0;
10242 struct sctp_tmit_chunk *at, *tp1, *last;
10243 struct sctp_strseq *strseq;
10244 unsigned int cnt_of_space, i, ovh;
10245 unsigned int space_needed;
10246 unsigned int cnt_of_skipped = 0;
10248 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10249 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
10250 /* no more to look at */
10253 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10254 /* We don't report these */
10259 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10260 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10262 cnt_of_space = M_TRAILINGSPACE(chk->data);
10264 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10265 ovh = SCTP_MIN_OVERHEAD;
10267 ovh = SCTP_MIN_V4_OVERHEAD;
10269 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10270 /* trim to a mtu size */
10271 cnt_of_space = asoc->smallest_mtu - ovh;
10273 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10274 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10275 0xff, 0, cnt_of_skipped,
10276 asoc->advanced_peer_ack_point);
10279 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10280 if (cnt_of_space < space_needed) {
10282 * ok we must trim down the chunk by lowering the
10283 * advance peer ack point.
10285 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10286 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10287 0xff, 0xff, cnt_of_space,
10290 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10291 cnt_of_skipped /= sizeof(struct sctp_strseq);
10293 * Go through and find the TSN that will be the one
10296 at = TAILQ_FIRST(&asoc->sent_queue);
10298 for (i = 0; i < cnt_of_skipped; i++) {
10299 tp1 = TAILQ_NEXT(at, sctp_next);
10306 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10307 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10308 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10309 asoc->advanced_peer_ack_point);
10313 * last now points to last one I can report, update
10317 advance_peer_ack_point = last->rec.data.TSN_seq;
10318 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10319 cnt_of_skipped * sizeof(struct sctp_strseq);
10321 chk->send_size = space_needed;
10322 /* Setup the chunk */
10323 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10324 fwdtsn->ch.chunk_length = htons(chk->send_size);
10325 fwdtsn->ch.chunk_flags = 0;
10326 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10327 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10328 SCTP_BUF_LEN(chk->data) = chk->send_size;
10331 * Move pointer to after the fwdtsn and transfer to the
10334 strseq = (struct sctp_strseq *)fwdtsn;
10336 * Now populate the strseq list. This is done blindly
10337 * without pulling out duplicate stream info. This is
10338 * inefficent but won't harm the process since the peer will
10339 * look at these in sequence and will thus release anything.
10340 * It could mean we exceed the PMTU and chop off some that
10341 * we could have included.. but this is unlikely (aka 1432/4
10342 * would mean 300+ stream seq's would have to be reported in
10343 * one FWD-TSN. With a bit of work we can later FIX this to
10344 * optimize and pull out duplcates.. but it does add more
10345 * overhead. So for now... not!
10347 at = TAILQ_FIRST(&asoc->sent_queue);
10348 for (i = 0; i < cnt_of_skipped; i++) {
10349 tp1 = TAILQ_NEXT(at, sctp_next);
10352 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10353 /* We don't report these */
10358 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10359 at->rec.data.fwd_tsn_cnt = 0;
10361 strseq->stream = ntohs(at->rec.data.stream_number);
10362 strseq->sequence = ntohs(at->rec.data.stream_seq);
10371 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10372 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10378 * Queue up a SACK or NR-SACK in the control queue.
10379 * We must first check to see if a SACK or NR-SACK is
10380 * somehow on the control queue.
10381 * If so, we will take and and remove the old one.
10383 struct sctp_association *asoc;
10384 struct sctp_tmit_chunk *chk, *a_chk;
10385 struct sctp_sack_chunk *sack;
10386 struct sctp_nr_sack_chunk *nr_sack;
10387 struct sctp_gap_ack_block *gap_descriptor;
10388 struct sack_track *selector;
10393 int limit_reached = 0;
10394 unsigned int i, siz, j;
10395 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10398 uint32_t highest_tsn;
10403 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10404 (stcb->asoc.peer_supports_nr_sack == 1)) {
10405 type = SCTP_NR_SELECTIVE_ACK;
10407 type = SCTP_SELECTIVE_ACK;
10410 asoc = &stcb->asoc;
10411 SCTP_TCB_LOCK_ASSERT(stcb);
10412 if (asoc->last_data_chunk_from == NULL) {
10413 /* Hmm we never received anything */
10416 sctp_slide_mapping_arrays(stcb);
10417 sctp_set_rwnd(stcb, asoc);
10418 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10419 if (chk->rec.chunk_id.id == type) {
10420 /* Hmm, found a sack already on queue, remove it */
10421 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10422 asoc->ctrl_queue_cnt--;
10425 sctp_m_freem(a_chk->data);
10426 a_chk->data = NULL;
10428 if (a_chk->whoTo) {
10429 sctp_free_remote_addr(a_chk->whoTo);
10430 a_chk->whoTo = NULL;
10435 if (a_chk == NULL) {
10436 sctp_alloc_a_chunk(stcb, a_chk);
10437 if (a_chk == NULL) {
10438 /* No memory so we drop the idea, and set a timer */
10439 if (stcb->asoc.delayed_ack) {
10440 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10441 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10442 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10443 stcb->sctp_ep, stcb, NULL);
10445 stcb->asoc.send_sack = 1;
10449 a_chk->copy_by_ref = 0;
10450 a_chk->rec.chunk_id.id = type;
10451 a_chk->rec.chunk_id.can_take_data = 1;
10453 /* Clear our pkt counts */
10454 asoc->data_pkts_seen = 0;
10456 a_chk->asoc = asoc;
10457 a_chk->snd_count = 0;
10458 a_chk->send_size = 0; /* fill in later */
10459 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10460 a_chk->whoTo = NULL;
10462 if ((asoc->numduptsns) ||
10463 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10465 * Ok, we have some duplicates or the destination for the
10466 * sack is unreachable, lets see if we can select an
10467 * alternate than asoc->last_data_chunk_from
10469 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10470 (asoc->used_alt_onsack > asoc->numnets)) {
10471 /* We used an alt last time, don't this time */
10472 a_chk->whoTo = NULL;
10474 asoc->used_alt_onsack++;
10475 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10477 if (a_chk->whoTo == NULL) {
10478 /* Nope, no alternate */
10479 a_chk->whoTo = asoc->last_data_chunk_from;
10480 asoc->used_alt_onsack = 0;
10484 * No duplicates so we use the last place we received data
10487 asoc->used_alt_onsack = 0;
10488 a_chk->whoTo = asoc->last_data_chunk_from;
10490 if (a_chk->whoTo) {
10491 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10493 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10494 highest_tsn = asoc->highest_tsn_inside_map;
10496 highest_tsn = asoc->highest_tsn_inside_nr_map;
10498 if (highest_tsn == asoc->cumulative_tsn) {
10500 if (type == SCTP_SELECTIVE_ACK) {
10501 space_req = sizeof(struct sctp_sack_chunk);
10503 space_req = sizeof(struct sctp_nr_sack_chunk);
10506 /* gaps get a cluster */
10507 space_req = MCLBYTES;
10509 /* Ok now lets formulate a MBUF with our sack */
10510 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10511 if ((a_chk->data == NULL) ||
10512 (a_chk->whoTo == NULL)) {
10513 /* rats, no mbuf memory */
10515 /* was a problem with the destination */
10516 sctp_m_freem(a_chk->data);
10517 a_chk->data = NULL;
10519 sctp_free_a_chunk(stcb, a_chk, so_locked);
10520 /* sa_ignore NO_NULL_CHK */
10521 if (stcb->asoc.delayed_ack) {
10522 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10523 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10524 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10525 stcb->sctp_ep, stcb, NULL);
10527 stcb->asoc.send_sack = 1;
10531 /* ok, lets go through and fill it in */
10532 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10533 space = M_TRAILINGSPACE(a_chk->data);
10534 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10535 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10537 limit = mtod(a_chk->data, caddr_t);
10542 if ((asoc->sctp_cmt_on_off > 0) &&
10543 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10545 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10546 * received, then set high bit to 1, else 0. Reset
10549 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10550 asoc->cmt_dac_pkts_rcvd = 0;
10552 #ifdef SCTP_ASOCLOG_OF_TSNS
10553 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10554 stcb->asoc.cumack_log_atsnt++;
10555 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10556 stcb->asoc.cumack_log_atsnt = 0;
10559 /* reset the readers interpretation */
10560 stcb->freed_by_sorcv_sincelast = 0;
10562 if (type == SCTP_SELECTIVE_ACK) {
10563 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10565 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10566 if (highest_tsn > asoc->mapping_array_base_tsn) {
10567 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10569 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10573 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10574 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10575 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10576 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10578 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10582 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10585 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10587 if (((type == SCTP_SELECTIVE_ACK) &&
10588 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10589 ((type == SCTP_NR_SELECTIVE_ACK) &&
10590 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10591 /* we have a gap .. maybe */
10592 for (i = 0; i < siz; i++) {
10593 tsn_map = asoc->mapping_array[i];
10594 if (type == SCTP_SELECTIVE_ACK) {
10595 tsn_map |= asoc->nr_mapping_array[i];
10599 * Clear all bits corresponding to TSNs
10600 * smaller or equal to the cumulative TSN.
10602 tsn_map &= (~0 << (1 - offset));
10604 selector = &sack_array[tsn_map];
10605 if (mergeable && selector->right_edge) {
10607 * Backup, left and right edges were ok to
10613 if (selector->num_entries == 0)
10616 for (j = 0; j < selector->num_entries; j++) {
10617 if (mergeable && selector->right_edge) {
10619 * do a merge by NOT setting
10625 * no merge, set the left
10629 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10631 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10634 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10640 if (selector->left_edge) {
10644 if (limit_reached) {
10645 /* Reached the limit stop */
10651 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10652 (limit_reached == 0)) {
10656 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10657 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10659 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10662 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10665 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10667 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10668 /* we have a gap .. maybe */
10669 for (i = 0; i < siz; i++) {
10670 tsn_map = asoc->nr_mapping_array[i];
10673 * Clear all bits corresponding to
10674 * TSNs smaller or equal to the
10677 tsn_map &= (~0 << (1 - offset));
10679 selector = &sack_array[tsn_map];
10680 if (mergeable && selector->right_edge) {
10682 * Backup, left and right edges were
10685 num_nr_gap_blocks--;
10688 if (selector->num_entries == 0)
10691 for (j = 0; j < selector->num_entries; j++) {
10692 if (mergeable && selector->right_edge) {
10694 * do a merge by NOT
10701 * no merge, set the
10705 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10707 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10708 num_nr_gap_blocks++;
10710 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10716 if (selector->left_edge) {
10720 if (limit_reached) {
10721 /* Reached the limit stop */
10728 /* now we must add any dups we are going to report. */
10729 if ((limit_reached == 0) && (asoc->numduptsns)) {
10730 dup = (uint32_t *) gap_descriptor;
10731 for (i = 0; i < asoc->numduptsns; i++) {
10732 *dup = htonl(asoc->dup_tsns[i]);
10735 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10740 asoc->numduptsns = 0;
10743 * now that the chunk is prepared queue it to the control chunk
10746 if (type == SCTP_SELECTIVE_ACK) {
10747 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10748 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10749 num_dups * sizeof(int32_t);
10750 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10751 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10752 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10753 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10754 sack->sack.num_dup_tsns = htons(num_dups);
10755 sack->ch.chunk_type = type;
10756 sack->ch.chunk_flags = flags;
10757 sack->ch.chunk_length = htons(a_chk->send_size);
10759 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10760 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10761 num_dups * sizeof(int32_t);
10762 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10763 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10764 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10765 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10766 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10767 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10768 nr_sack->nr_sack.reserved = 0;
10769 nr_sack->ch.chunk_type = type;
10770 nr_sack->ch.chunk_flags = flags;
10771 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10773 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10774 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10775 asoc->ctrl_queue_cnt++;
10776 asoc->send_sack = 0;
10777 SCTP_STAT_INCR(sctps_sendsacks);
10782 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10783 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10788 struct mbuf *m_abort;
10789 struct mbuf *m_out = NULL, *m_end = NULL;
10790 struct sctp_abort_chunk *abort = NULL;
10792 uint32_t auth_offset = 0;
10793 struct sctp_auth_chunk *auth = NULL;
10794 struct sctp_nets *net;
10797 * Add an AUTH chunk, if chunk requires it and save the offset into
10798 * the chain for AUTH
10800 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10801 stcb->asoc.peer_auth_chunks)) {
10802 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10803 stcb, SCTP_ABORT_ASSOCIATION);
10804 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10806 SCTP_TCB_LOCK_ASSERT(stcb);
10807 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10808 if (m_abort == NULL) {
10811 sctp_m_freem(m_out);
10814 /* link in any error */
10815 SCTP_BUF_NEXT(m_abort) = operr;
10822 sz += SCTP_BUF_LEN(n);
10823 n = SCTP_BUF_NEXT(n);
10826 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10827 if (m_out == NULL) {
10828 /* NO Auth chunk prepended, so reserve space in front */
10829 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10832 /* Put AUTH chunk at the front of the chain */
10833 SCTP_BUF_NEXT(m_end) = m_abort;
10835 if (stcb->asoc.alternate) {
10836 net = stcb->asoc.alternate;
10838 net = stcb->asoc.primary_destination;
10840 /* fill in the ABORT chunk */
10841 abort = mtod(m_abort, struct sctp_abort_chunk *);
10842 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10843 abort->ch.chunk_flags = 0;
10844 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10846 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10847 (struct sockaddr *)&net->ro._l_addr,
10848 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10849 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10850 stcb->asoc.primary_destination->port, so_locked, NULL, NULL);
10851 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10855 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10856 struct sctp_nets *net,
10859 /* formulate and SEND a SHUTDOWN-COMPLETE */
10860 struct mbuf *m_shutdown_comp;
10861 struct sctp_shutdown_complete_chunk *shutdown_complete;
10865 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10866 if (m_shutdown_comp == NULL) {
10870 if (reflect_vtag) {
10871 flags = SCTP_HAD_NO_TCB;
10872 vtag = stcb->asoc.my_vtag;
10875 vtag = stcb->asoc.peer_vtag;
10877 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10878 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10879 shutdown_complete->ch.chunk_flags = flags;
10880 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10881 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10882 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10883 (struct sockaddr *)&net->ro._l_addr,
10884 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10885 stcb->sctp_ep->sctp_lport, stcb->rport,
10887 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL);
10888 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10893 sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
10894 uint32_t vrf_id, uint16_t port)
10896 /* formulate and SEND a SHUTDOWN-COMPLETE */
10897 struct mbuf *o_pak;
10900 struct udphdr *udp = NULL;
10901 int offset_out, len, mlen;
10902 struct sctp_shutdown_complete_msg *comp_cp;
10905 struct ip *iph_out;
10909 struct ip6_hdr *ip6, *ip6_out;
10913 iph = mtod(m, struct ip *);
10914 switch (iph->ip_v) {
10917 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
10921 case IPV6_VERSION >> 4:
10922 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
10929 len += sizeof(struct udphdr);
10931 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10932 if (mout == NULL) {
10935 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10936 SCTP_BUF_LEN(mout) = len;
10937 SCTP_BUF_NEXT(mout) = NULL;
10938 if (m->m_flags & M_FLOWID) {
10939 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
10940 mout->m_flags |= M_FLOWID;
10950 switch (iph->ip_v) {
10953 iph_out = mtod(mout, struct ip *);
10955 /* Fill in the IP header for the ABORT */
10956 iph_out->ip_v = IPVERSION;
10957 iph_out->ip_hl = (sizeof(struct ip) / 4);
10958 iph_out->ip_tos = (u_char)0;
10959 iph_out->ip_id = 0;
10960 iph_out->ip_off = 0;
10961 iph_out->ip_ttl = MAXTTL;
10963 iph_out->ip_p = IPPROTO_UDP;
10965 iph_out->ip_p = IPPROTO_SCTP;
10967 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10968 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10970 /* let IP layer calculate this */
10971 iph_out->ip_sum = 0;
10972 offset_out += sizeof(*iph_out);
10973 comp_cp = (struct sctp_shutdown_complete_msg *)(
10974 (caddr_t)iph_out + offset_out);
10978 case IPV6_VERSION >> 4:
10979 ip6 = (struct ip6_hdr *)iph;
10980 ip6_out = mtod(mout, struct ip6_hdr *);
10982 /* Fill in the IPv6 header for the ABORT */
10983 ip6_out->ip6_flow = ip6->ip6_flow;
10984 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10986 ip6_out->ip6_nxt = IPPROTO_UDP;
10988 ip6_out->ip6_nxt = IPPROTO_SCTP;
10990 ip6_out->ip6_src = ip6->ip6_dst;
10991 ip6_out->ip6_dst = ip6->ip6_src;
10993 * ?? The old code had both the iph len + payload, I think
10994 * this is wrong and would never have worked
10996 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
10997 offset_out += sizeof(*ip6_out);
10998 comp_cp = (struct sctp_shutdown_complete_msg *)(
10999 (caddr_t)ip6_out + offset_out);
11003 /* Currently not supported. */
11004 sctp_m_freem(mout);
11008 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
11009 sctp_m_freem(mout);
11012 udp = (struct udphdr *)comp_cp;
11013 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
11014 udp->uh_dport = port;
11015 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
11019 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11025 offset_out += sizeof(struct udphdr);
11026 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
11028 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11030 sctp_m_freem(mout);
11033 /* Now copy in and fill in the ABORT tags etc. */
11034 comp_cp->sh.src_port = sh->dest_port;
11035 comp_cp->sh.dest_port = sh->src_port;
11036 comp_cp->sh.checksum = 0;
11037 comp_cp->sh.v_tag = sh->v_tag;
11038 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
11039 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11040 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11043 if (iph_out != NULL) {
11047 mlen = SCTP_BUF_LEN(mout);
11048 bzero(&ro, sizeof ro);
11049 /* set IPv4 length */
11050 iph_out->ip_len = mlen;
11051 #ifdef SCTP_PACKET_LOGGING
11052 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11053 sctp_packet_log(mout, mlen);
11056 #if defined(SCTP_WITH_NO_CSUM)
11057 SCTP_STAT_INCR(sctps_sendnocrc);
11059 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
11060 SCTP_STAT_INCR(sctps_sendswcrc);
11063 SCTP_ENABLE_UDP_CSUM(mout);
11066 #if defined(SCTP_WITH_NO_CSUM)
11067 SCTP_STAT_INCR(sctps_sendnocrc);
11069 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11070 mout->m_pkthdr.csum_data = 0;
11071 SCTP_STAT_INCR(sctps_sendhwcrc);
11074 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11076 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11078 /* Free the route if we got one back */
11084 if (ip6_out != NULL) {
11085 struct route_in6 ro;
11087 struct ifnet *ifp = NULL;
11089 bzero(&ro, sizeof(ro));
11090 mlen = SCTP_BUF_LEN(mout);
11091 #ifdef SCTP_PACKET_LOGGING
11092 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11093 sctp_packet_log(mout, mlen);
11095 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11097 #if defined(SCTP_WITH_NO_CSUM)
11098 SCTP_STAT_INCR(sctps_sendnocrc);
11100 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11101 SCTP_STAT_INCR(sctps_sendswcrc);
11103 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
11104 udp->uh_sum = 0xffff;
11107 #if defined(SCTP_WITH_NO_CSUM)
11108 SCTP_STAT_INCR(sctps_sendnocrc);
11110 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11111 mout->m_pkthdr.csum_data = 0;
11112 SCTP_STAT_INCR(sctps_sendhwcrc);
11115 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11117 /* Free the route if we got one back */
11122 SCTP_STAT_INCR(sctps_sendpackets);
11123 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11124 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11130 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11131 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11136 struct sctp_tmit_chunk *chk;
11137 struct sctp_heartbeat_chunk *hb;
11138 struct timeval now;
11140 SCTP_TCB_LOCK_ASSERT(stcb);
11144 (void)SCTP_GETTIME_TIMEVAL(&now);
11145 switch (net->ro._l_addr.sa.sa_family) {
11157 sctp_alloc_a_chunk(stcb, chk);
11159 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11162 chk->copy_by_ref = 0;
11163 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11164 chk->rec.chunk_id.can_take_data = 1;
11165 chk->asoc = &stcb->asoc;
11166 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11168 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11169 if (chk->data == NULL) {
11170 sctp_free_a_chunk(stcb, chk, so_locked);
11173 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11174 SCTP_BUF_LEN(chk->data) = chk->send_size;
11175 chk->sent = SCTP_DATAGRAM_UNSENT;
11176 chk->snd_count = 0;
11178 atomic_add_int(&chk->whoTo->ref_count, 1);
11179 /* Now we have a mbuf that we can fill in with the details */
11180 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11181 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11182 /* fill out chunk header */
11183 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11184 hb->ch.chunk_flags = 0;
11185 hb->ch.chunk_length = htons(chk->send_size);
11186 /* Fill out hb parameter */
11187 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11188 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11189 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11190 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11191 /* Did our user request this one, put it in */
11192 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11193 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11194 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11196 * we only take from the entropy pool if the address is not
11199 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11200 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11202 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11203 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11205 switch (net->ro._l_addr.sa.sa_family) {
11208 memcpy(hb->heartbeat.hb_info.address,
11209 &net->ro._l_addr.sin.sin_addr,
11210 sizeof(net->ro._l_addr.sin.sin_addr));
11215 memcpy(hb->heartbeat.hb_info.address,
11216 &net->ro._l_addr.sin6.sin6_addr,
11217 sizeof(net->ro._l_addr.sin6.sin6_addr));
11224 net->hb_responded = 0;
11225 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11226 stcb->asoc.ctrl_queue_cnt++;
11227 SCTP_STAT_INCR(sctps_sendheartbeat);
11232 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11235 struct sctp_association *asoc;
11236 struct sctp_ecne_chunk *ecne;
11237 struct sctp_tmit_chunk *chk;
11242 asoc = &stcb->asoc;
11243 SCTP_TCB_LOCK_ASSERT(stcb);
11244 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11245 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11246 /* found a previous ECN_ECHO update it if needed */
11247 uint32_t cnt, ctsn;
11249 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11250 ctsn = ntohl(ecne->tsn);
11251 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11252 ecne->tsn = htonl(high_tsn);
11253 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11255 cnt = ntohl(ecne->num_pkts_since_cwr);
11257 ecne->num_pkts_since_cwr = htonl(cnt);
11261 /* nope could not find one to update so we must build one */
11262 sctp_alloc_a_chunk(stcb, chk);
11266 chk->copy_by_ref = 0;
11267 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11268 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11269 chk->rec.chunk_id.can_take_data = 0;
11270 chk->asoc = &stcb->asoc;
11271 chk->send_size = sizeof(struct sctp_ecne_chunk);
11272 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11273 if (chk->data == NULL) {
11274 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11277 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11278 SCTP_BUF_LEN(chk->data) = chk->send_size;
11279 chk->sent = SCTP_DATAGRAM_UNSENT;
11280 chk->snd_count = 0;
11282 atomic_add_int(&chk->whoTo->ref_count, 1);
11284 stcb->asoc.ecn_echo_cnt_onq++;
11285 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11286 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11287 ecne->ch.chunk_flags = 0;
11288 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11289 ecne->tsn = htonl(high_tsn);
11290 ecne->num_pkts_since_cwr = htonl(1);
11291 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11292 asoc->ctrl_queue_cnt++;
11296 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11297 struct mbuf *m, int iphlen, int bad_crc)
11299 struct sctp_association *asoc;
11300 struct sctp_pktdrop_chunk *drp;
11301 struct sctp_tmit_chunk *chk;
11308 struct ip6_hdr *ip6h;
11311 int fullsz = 0, extra = 0;
11314 struct sctp_chunkhdr *ch, chunk_buf;
11315 unsigned int chk_length;
11320 asoc = &stcb->asoc;
11321 SCTP_TCB_LOCK_ASSERT(stcb);
11322 if (asoc->peer_supports_pktdrop == 0) {
11324 * peer must declare support before I send one.
11328 if (stcb->sctp_socket == NULL) {
11331 sctp_alloc_a_chunk(stcb, chk);
11335 chk->copy_by_ref = 0;
11336 iph = mtod(m, struct ip *);
11338 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11341 switch (iph->ip_v) {
11345 len = chk->send_size = iph->ip_len;
11349 case IPV6_VERSION >> 4:
11351 ip6h = mtod(m, struct ip6_hdr *);
11352 len = chk->send_size = htons(ip6h->ip6_plen);
11358 /* Validate that we do not have an ABORT in here. */
11359 offset = iphlen + sizeof(struct sctphdr);
11360 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11361 sizeof(*ch), (uint8_t *) & chunk_buf);
11362 while (ch != NULL) {
11363 chk_length = ntohs(ch->chunk_length);
11364 if (chk_length < sizeof(*ch)) {
11365 /* break to abort land */
11368 switch (ch->chunk_type) {
11369 case SCTP_PACKET_DROPPED:
11370 case SCTP_ABORT_ASSOCIATION:
11371 case SCTP_INITIATION_ACK:
11373 * We don't respond with an PKT-DROP to an ABORT
11374 * or PKT-DROP. We also do not respond to an
11375 * INIT-ACK, because we can't know if the initiation
11376 * tag is correct or not.
11378 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11383 offset += SCTP_SIZE32(chk_length);
11384 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11385 sizeof(*ch), (uint8_t *) & chunk_buf);
11388 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11389 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11391 * only send 1 mtu worth, trim off the excess on the end.
11393 fullsz = len - extra;
11394 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11397 chk->asoc = &stcb->asoc;
11398 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11399 if (chk->data == NULL) {
11401 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11404 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11405 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11407 sctp_m_freem(chk->data);
11411 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11412 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11413 chk->book_size_scale = 0;
11415 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11416 drp->trunc_len = htons(fullsz);
11418 * Len is already adjusted to size minus overhead above take
11419 * out the pkt_drop chunk itself from it.
11421 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11422 len = chk->send_size;
11424 /* no truncation needed */
11425 drp->ch.chunk_flags = 0;
11426 drp->trunc_len = htons(0);
11429 drp->ch.chunk_flags |= SCTP_BADCRC;
11431 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11432 SCTP_BUF_LEN(chk->data) = chk->send_size;
11433 chk->sent = SCTP_DATAGRAM_UNSENT;
11434 chk->snd_count = 0;
11436 /* we should hit here */
11438 atomic_add_int(&chk->whoTo->ref_count, 1);
11442 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11443 chk->rec.chunk_id.can_take_data = 1;
11444 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11445 drp->ch.chunk_length = htons(chk->send_size);
11446 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11450 drp->bottle_bw = htonl(spc);
11451 if (asoc->my_rwnd) {
11452 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11453 asoc->size_on_all_streams +
11454 asoc->my_rwnd_control_len +
11455 stcb->sctp_socket->so_rcv.sb_cc);
11458 * If my rwnd is 0, possibly from mbuf depletion as well as
11459 * space used, tell the peer there is NO space aka onq == bw
11461 drp->current_onq = htonl(spc);
11465 m_copydata(m, iphlen, len, (caddr_t)datap);
11466 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11467 asoc->ctrl_queue_cnt++;
11471 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11473 struct sctp_association *asoc;
11474 struct sctp_cwr_chunk *cwr;
11475 struct sctp_tmit_chunk *chk;
11477 asoc = &stcb->asoc;
11478 SCTP_TCB_LOCK_ASSERT(stcb);
11482 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11483 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11485 * found a previous CWR queued to same destination
11486 * update it if needed
11490 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11491 ctsn = ntohl(cwr->tsn);
11492 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11493 cwr->tsn = htonl(high_tsn);
11495 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11496 /* Make sure override is carried */
11497 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11502 sctp_alloc_a_chunk(stcb, chk);
11506 chk->copy_by_ref = 0;
11507 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11508 chk->rec.chunk_id.can_take_data = 1;
11509 chk->asoc = &stcb->asoc;
11510 chk->send_size = sizeof(struct sctp_cwr_chunk);
11511 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11512 if (chk->data == NULL) {
11513 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11516 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11517 SCTP_BUF_LEN(chk->data) = chk->send_size;
11518 chk->sent = SCTP_DATAGRAM_UNSENT;
11519 chk->snd_count = 0;
11521 atomic_add_int(&chk->whoTo->ref_count, 1);
11522 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11523 cwr->ch.chunk_type = SCTP_ECN_CWR;
11524 cwr->ch.chunk_flags = override;
11525 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11526 cwr->tsn = htonl(high_tsn);
11527 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11528 asoc->ctrl_queue_cnt++;
11532 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11533 int number_entries, uint16_t * list,
11534 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11536 int len, old_len, i;
11537 struct sctp_stream_reset_out_request *req_out;
11538 struct sctp_chunkhdr *ch;
11540 ch = mtod(chk->data, struct sctp_chunkhdr *);
11543 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11545 /* get to new offset for the param. */
11546 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11547 /* now how long will this param be? */
11548 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11549 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11550 req_out->ph.param_length = htons(len);
11551 req_out->request_seq = htonl(seq);
11552 req_out->response_seq = htonl(resp_seq);
11553 req_out->send_reset_at_tsn = htonl(last_sent);
11554 if (number_entries) {
11555 for (i = 0; i < number_entries; i++) {
11556 req_out->list_of_streams[i] = htons(list[i]);
11559 if (SCTP_SIZE32(len) > len) {
11561 * Need to worry about the pad we may end up adding to the
11562 * end. This is easy since the struct is either aligned to 4
11563 * bytes or 2 bytes off.
11565 req_out->list_of_streams[number_entries] = 0;
11567 /* now fix the chunk length */
11568 ch->chunk_length = htons(len + old_len);
11569 chk->book_size = len + old_len;
11570 chk->book_size_scale = 0;
11571 chk->send_size = SCTP_SIZE32(chk->book_size);
11572 SCTP_BUF_LEN(chk->data) = chk->send_size;
11578 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11579 int number_entries, uint16_t * list,
11582 int len, old_len, i;
11583 struct sctp_stream_reset_in_request *req_in;
11584 struct sctp_chunkhdr *ch;
11586 ch = mtod(chk->data, struct sctp_chunkhdr *);
11589 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11591 /* get to new offset for the param. */
11592 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11593 /* now how long will this param be? */
11594 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11595 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11596 req_in->ph.param_length = htons(len);
11597 req_in->request_seq = htonl(seq);
11598 if (number_entries) {
11599 for (i = 0; i < number_entries; i++) {
11600 req_in->list_of_streams[i] = htons(list[i]);
11603 if (SCTP_SIZE32(len) > len) {
11605 * Need to worry about the pad we may end up adding to the
11606 * end. This is easy since the struct is either aligned to 4
11607 * bytes or 2 bytes off.
11609 req_in->list_of_streams[number_entries] = 0;
11611 /* now fix the chunk length */
11612 ch->chunk_length = htons(len + old_len);
11613 chk->book_size = len + old_len;
11614 chk->book_size_scale = 0;
11615 chk->send_size = SCTP_SIZE32(chk->book_size);
11616 SCTP_BUF_LEN(chk->data) = chk->send_size;
11622 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11626 struct sctp_stream_reset_tsn_request *req_tsn;
11627 struct sctp_chunkhdr *ch;
11629 ch = mtod(chk->data, struct sctp_chunkhdr *);
11632 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11634 /* get to new offset for the param. */
11635 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11636 /* now how long will this param be? */
11637 len = sizeof(struct sctp_stream_reset_tsn_request);
11638 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11639 req_tsn->ph.param_length = htons(len);
11640 req_tsn->request_seq = htonl(seq);
11642 /* now fix the chunk length */
11643 ch->chunk_length = htons(len + old_len);
11644 chk->send_size = len + old_len;
11645 chk->book_size = SCTP_SIZE32(chk->send_size);
11646 chk->book_size_scale = 0;
11647 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11652 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11653 uint32_t resp_seq, uint32_t result)
11656 struct sctp_stream_reset_response *resp;
11657 struct sctp_chunkhdr *ch;
11659 ch = mtod(chk->data, struct sctp_chunkhdr *);
11662 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11664 /* get to new offset for the param. */
11665 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11666 /* now how long will this param be? */
11667 len = sizeof(struct sctp_stream_reset_response);
11668 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11669 resp->ph.param_length = htons(len);
11670 resp->response_seq = htonl(resp_seq);
11671 resp->result = ntohl(result);
11673 /* now fix the chunk length */
11674 ch->chunk_length = htons(len + old_len);
11675 chk->book_size = len + old_len;
11676 chk->book_size_scale = 0;
11677 chk->send_size = SCTP_SIZE32(chk->book_size);
11678 SCTP_BUF_LEN(chk->data) = chk->send_size;
11685 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11686 uint32_t resp_seq, uint32_t result,
11687 uint32_t send_una, uint32_t recv_next)
11690 struct sctp_stream_reset_response_tsn *resp;
11691 struct sctp_chunkhdr *ch;
11693 ch = mtod(chk->data, struct sctp_chunkhdr *);
11696 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11698 /* get to new offset for the param. */
11699 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11700 /* now how long will this param be? */
11701 len = sizeof(struct sctp_stream_reset_response_tsn);
11702 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11703 resp->ph.param_length = htons(len);
11704 resp->response_seq = htonl(resp_seq);
11705 resp->result = htonl(result);
11706 resp->senders_next_tsn = htonl(send_una);
11707 resp->receivers_next_tsn = htonl(recv_next);
11709 /* now fix the chunk length */
11710 ch->chunk_length = htons(len + old_len);
11711 chk->book_size = len + old_len;
11712 chk->send_size = SCTP_SIZE32(chk->book_size);
11713 chk->book_size_scale = 0;
11714 SCTP_BUF_LEN(chk->data) = chk->send_size;
11719 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11724 struct sctp_chunkhdr *ch;
11725 struct sctp_stream_reset_add_strm *addstr;
11727 ch = mtod(chk->data, struct sctp_chunkhdr *);
11728 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11730 /* get to new offset for the param. */
11731 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11732 /* now how long will this param be? */
11733 len = sizeof(struct sctp_stream_reset_add_strm);
11736 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11737 addstr->ph.param_length = htons(len);
11738 addstr->request_seq = htonl(seq);
11739 addstr->number_of_streams = htons(adding);
11740 addstr->reserved = 0;
11742 /* now fix the chunk length */
11743 ch->chunk_length = htons(len + old_len);
11744 chk->send_size = len + old_len;
11745 chk->book_size = SCTP_SIZE32(chk->send_size);
11746 chk->book_size_scale = 0;
11747 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11752 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11757 struct sctp_chunkhdr *ch;
11758 struct sctp_stream_reset_add_strm *addstr;
11760 ch = mtod(chk->data, struct sctp_chunkhdr *);
11761 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11763 /* get to new offset for the param. */
11764 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11765 /* now how long will this param be? */
11766 len = sizeof(struct sctp_stream_reset_add_strm);
11768 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11769 addstr->ph.param_length = htons(len);
11770 addstr->request_seq = htonl(seq);
11771 addstr->number_of_streams = htons(adding);
11772 addstr->reserved = 0;
11774 /* now fix the chunk length */
11775 ch->chunk_length = htons(len + old_len);
11776 chk->send_size = len + old_len;
11777 chk->book_size = SCTP_SIZE32(chk->send_size);
11778 chk->book_size_scale = 0;
11779 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11786 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11787 int number_entries, uint16_t * list,
11788 uint8_t send_out_req,
11789 uint8_t send_in_req,
11790 uint8_t send_tsn_req,
11791 uint8_t add_stream,
11793 uint16_t adding_i, uint8_t peer_asked
11797 struct sctp_association *asoc;
11798 struct sctp_tmit_chunk *chk;
11799 struct sctp_chunkhdr *ch;
11802 asoc = &stcb->asoc;
11803 if (asoc->stream_reset_outstanding) {
11805 * Already one pending, must get ACK back to clear the flag.
11807 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11810 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11811 (add_stream == 0)) {
11812 /* nothing to do */
11813 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11816 if (send_tsn_req && (send_out_req || send_in_req)) {
11817 /* error, can't do that */
11818 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11821 sctp_alloc_a_chunk(stcb, chk);
11823 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11826 chk->copy_by_ref = 0;
11827 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11828 chk->rec.chunk_id.can_take_data = 0;
11829 chk->asoc = &stcb->asoc;
11830 chk->book_size = sizeof(struct sctp_chunkhdr);
11831 chk->send_size = SCTP_SIZE32(chk->book_size);
11832 chk->book_size_scale = 0;
11834 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11835 if (chk->data == NULL) {
11836 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11837 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11840 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11842 /* setup chunk parameters */
11843 chk->sent = SCTP_DATAGRAM_UNSENT;
11844 chk->snd_count = 0;
11845 if (stcb->asoc.alternate) {
11846 chk->whoTo = stcb->asoc.alternate;
11848 chk->whoTo = stcb->asoc.primary_destination;
11850 atomic_add_int(&chk->whoTo->ref_count, 1);
11851 ch = mtod(chk->data, struct sctp_chunkhdr *);
11852 ch->chunk_type = SCTP_STREAM_RESET;
11853 ch->chunk_flags = 0;
11854 ch->chunk_length = htons(chk->book_size);
11855 SCTP_BUF_LEN(chk->data) = chk->send_size;
11857 seq = stcb->asoc.str_reset_seq_out;
11858 if (send_out_req) {
11859 sctp_add_stream_reset_out(chk, number_entries, list,
11860 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11861 asoc->stream_reset_out_is_outstanding = 1;
11863 asoc->stream_reset_outstanding++;
11865 if ((add_stream & 1) &&
11866 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11867 /* Need to allocate more */
11868 struct sctp_stream_out *oldstream;
11869 struct sctp_stream_queue_pending *sp, *nsp;
11872 oldstream = stcb->asoc.strmout;
11873 /* get some more */
11874 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11875 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11877 if (stcb->asoc.strmout == NULL) {
11880 stcb->asoc.strmout = oldstream;
11881 /* Turn off the bit */
11882 x = add_stream & 0xfe;
11887 * Ok now we proceed with copying the old out stuff and
11888 * initializing the new stuff.
11890 SCTP_TCB_SEND_LOCK(stcb);
11891 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11892 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11893 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11894 stcb->asoc.strmout[i].next_sequence_sent = oldstream[i].next_sequence_sent;
11895 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11896 stcb->asoc.strmout[i].stream_no = i;
11897 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11898 /* now anything on those queues? */
11899 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11900 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11901 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11903 /* Now move assoc pointers too */
11904 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11905 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11907 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11908 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11911 /* now the new streams */
11912 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11913 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11914 stcb->asoc.strmout[i].next_sequence_sent = 0x0;
11915 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11916 stcb->asoc.strmout[i].stream_no = i;
11917 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11918 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11920 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11921 SCTP_FREE(oldstream, SCTP_M_STRMO);
11922 SCTP_TCB_SEND_UNLOCK(stcb);
11925 if ((add_stream & 1) && (adding_o > 0)) {
11926 asoc->strm_pending_add_size = adding_o;
11927 asoc->peer_req_out = peer_asked;
11928 sctp_add_an_out_stream(chk, seq, adding_o);
11930 asoc->stream_reset_outstanding++;
11932 if ((add_stream & 2) && (adding_i > 0)) {
11933 sctp_add_an_in_stream(chk, seq, adding_i);
11935 asoc->stream_reset_outstanding++;
11938 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11940 asoc->stream_reset_outstanding++;
11942 if (send_tsn_req) {
11943 sctp_add_stream_reset_tsn(chk, seq);
11944 asoc->stream_reset_outstanding++;
11946 asoc->str_reset = chk;
11947 /* insert the chunk for sending */
11948 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11951 asoc->ctrl_queue_cnt++;
11952 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11957 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11958 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
11961 * Formulate the abort message, and send it back down.
11963 struct mbuf *o_pak;
11965 struct sctp_abort_msg *abm;
11967 struct udphdr *udp;
11968 int iphlen_out, len;
11971 struct ip *iph_out;
11975 struct ip6_hdr *ip6, *ip6_out;
11979 /* don't respond to ABORT with ABORT */
11980 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11982 sctp_m_freem(err_cause);
11985 iph = mtod(m, struct ip *);
11986 switch (iph->ip_v) {
11989 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
11993 case IPV6_VERSION >> 4:
11994 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
11999 sctp_m_freem(err_cause);
12004 len += sizeof(struct udphdr);
12006 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
12007 if (mout == NULL) {
12009 sctp_m_freem(err_cause);
12013 SCTP_BUF_RESV_UF(mout, max_linkhdr);
12014 SCTP_BUF_LEN(mout) = len;
12015 SCTP_BUF_NEXT(mout) = err_cause;
12016 if (m->m_flags & M_FLOWID) {
12017 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12018 mout->m_flags |= M_FLOWID;
12026 switch (iph->ip_v) {
12029 iph_out = mtod(mout, struct ip *);
12031 /* Fill in the IP header for the ABORT */
12032 iph_out->ip_v = IPVERSION;
12033 iph_out->ip_hl = (sizeof(struct ip) / 4);
12034 iph_out->ip_tos = (u_char)0;
12035 iph_out->ip_id = 0;
12036 iph_out->ip_off = 0;
12037 iph_out->ip_ttl = MAXTTL;
12039 iph_out->ip_p = IPPROTO_UDP;
12041 iph_out->ip_p = IPPROTO_SCTP;
12043 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12044 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12045 /* let IP layer calculate this */
12046 iph_out->ip_sum = 0;
12048 iphlen_out = sizeof(*iph_out);
12049 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
12053 case IPV6_VERSION >> 4:
12054 ip6 = (struct ip6_hdr *)iph;
12055 ip6_out = mtod(mout, struct ip6_hdr *);
12057 /* Fill in the IP6 header for the ABORT */
12058 ip6_out->ip6_flow = ip6->ip6_flow;
12059 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12061 ip6_out->ip6_nxt = IPPROTO_UDP;
12063 ip6_out->ip6_nxt = IPPROTO_SCTP;
12065 ip6_out->ip6_src = ip6->ip6_dst;
12066 ip6_out->ip6_dst = ip6->ip6_src;
12068 iphlen_out = sizeof(*ip6_out);
12069 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
12073 /* Currently not supported */
12074 sctp_m_freem(mout);
12078 udp = (struct udphdr *)abm;
12080 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12081 sctp_m_freem(mout);
12084 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12085 udp->uh_dport = port;
12086 /* set udp->uh_ulen later */
12088 iphlen_out += sizeof(struct udphdr);
12089 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
12091 abm->sh.src_port = sh->dest_port;
12092 abm->sh.dest_port = sh->src_port;
12093 abm->sh.checksum = 0;
12095 abm->sh.v_tag = sh->v_tag;
12096 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
12098 abm->sh.v_tag = htonl(vtag);
12099 abm->msg.ch.chunk_flags = 0;
12101 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
12104 struct mbuf *m_tmp = err_cause;
12107 /* get length of the err_cause chain */
12108 while (m_tmp != NULL) {
12109 err_len += SCTP_BUF_LEN(m_tmp);
12110 m_tmp = SCTP_BUF_NEXT(m_tmp);
12112 len = SCTP_BUF_LEN(mout) + err_len;
12114 /* need pad at end of chunk */
12115 uint32_t cpthis = 0;
12118 padlen = 4 - (len % 4);
12119 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12122 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
12124 len = SCTP_BUF_LEN(mout);
12125 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
12128 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12130 sctp_m_freem(mout);
12134 if (iph_out != NULL) {
12138 /* zap the stack pointer to the route */
12139 bzero(&ro, sizeof ro);
12141 udp->uh_ulen = htons(len - sizeof(struct ip));
12143 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12148 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
12149 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
12150 /* set IPv4 length */
12151 iph_out->ip_len = len;
12153 #ifdef SCTP_PACKET_LOGGING
12154 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12155 sctp_packet_log(mout, len);
12157 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12159 #if defined(SCTP_WITH_NO_CSUM)
12160 SCTP_STAT_INCR(sctps_sendnocrc);
12162 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
12163 SCTP_STAT_INCR(sctps_sendswcrc);
12166 SCTP_ENABLE_UDP_CSUM(o_pak);
12169 #if defined(SCTP_WITH_NO_CSUM)
12170 SCTP_STAT_INCR(sctps_sendnocrc);
12172 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12173 mout->m_pkthdr.csum_data = 0;
12174 SCTP_STAT_INCR(sctps_sendhwcrc);
12177 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12179 /* Free the route if we got one back */
12185 if (ip6_out != NULL) {
12186 struct route_in6 ro;
12188 struct ifnet *ifp = NULL;
12190 /* zap the stack pointer to the route */
12191 bzero(&ro, sizeof(ro));
12193 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12195 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
12196 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
12197 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12198 #ifdef SCTP_PACKET_LOGGING
12199 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12200 sctp_packet_log(mout, len);
12202 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12204 #if defined(SCTP_WITH_NO_CSUM)
12205 SCTP_STAT_INCR(sctps_sendnocrc);
12207 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12208 SCTP_STAT_INCR(sctps_sendswcrc);
12210 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12211 udp->uh_sum = 0xffff;
12214 #if defined(SCTP_WITH_NO_CSUM)
12215 SCTP_STAT_INCR(sctps_sendnocrc);
12217 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12218 mout->m_pkthdr.csum_data = 0;
12219 SCTP_STAT_INCR(sctps_sendhwcrc);
12222 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12224 /* Free the route if we got one back */
12229 SCTP_STAT_INCR(sctps_sendpackets);
12230 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12231 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12235 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
12236 uint32_t vrf_id, uint16_t port)
12238 struct mbuf *o_pak;
12239 struct sctphdr *sh, *sh_out;
12240 struct sctp_chunkhdr *ch;
12242 struct udphdr *udp = NULL;
12244 int iphlen_out, len;
12247 struct ip *iph_out;
12251 struct ip6_hdr *ip6, *ip6_out;
12255 iph = mtod(m, struct ip *);
12256 sh = (struct sctphdr *)((caddr_t)iph + iphlen);
12257 switch (iph->ip_v) {
12260 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12264 case IPV6_VERSION >> 4:
12265 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12275 len += sizeof(struct udphdr);
12277 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
12278 if (mout == NULL) {
12284 SCTP_BUF_RESV_UF(mout, max_linkhdr);
12285 SCTP_BUF_LEN(mout) = len;
12286 SCTP_BUF_NEXT(mout) = scm;
12287 if (m->m_flags & M_FLOWID) {
12288 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12289 mout->m_flags |= M_FLOWID;
12297 switch (iph->ip_v) {
12300 iph_out = mtod(mout, struct ip *);
12302 /* Fill in the IP header for the ABORT */
12303 iph_out->ip_v = IPVERSION;
12304 iph_out->ip_hl = (sizeof(struct ip) / 4);
12305 iph_out->ip_tos = (u_char)0;
12306 iph_out->ip_id = 0;
12307 iph_out->ip_off = 0;
12308 iph_out->ip_ttl = MAXTTL;
12310 iph_out->ip_p = IPPROTO_UDP;
12312 iph_out->ip_p = IPPROTO_SCTP;
12314 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12315 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12316 /* let IP layer calculate this */
12317 iph_out->ip_sum = 0;
12319 iphlen_out = sizeof(struct ip);
12320 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
12324 case IPV6_VERSION >> 4:
12325 ip6 = (struct ip6_hdr *)iph;
12326 ip6_out = mtod(mout, struct ip6_hdr *);
12328 /* Fill in the IP6 header for the ABORT */
12329 ip6_out->ip6_flow = ip6->ip6_flow;
12330 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12332 ip6_out->ip6_nxt = IPPROTO_UDP;
12334 ip6_out->ip6_nxt = IPPROTO_SCTP;
12336 ip6_out->ip6_src = ip6->ip6_dst;
12337 ip6_out->ip6_dst = ip6->ip6_src;
12339 iphlen_out = sizeof(struct ip6_hdr);
12340 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
12344 /* Currently not supported */
12345 sctp_m_freem(mout);
12349 udp = (struct udphdr *)sh_out;
12351 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12352 sctp_m_freem(mout);
12355 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12356 udp->uh_dport = port;
12357 /* set udp->uh_ulen later */
12359 iphlen_out += sizeof(struct udphdr);
12360 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
12362 sh_out->src_port = sh->dest_port;
12363 sh_out->dest_port = sh->src_port;
12364 sh_out->v_tag = vtag;
12365 sh_out->checksum = 0;
12367 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
12368 ch->chunk_type = SCTP_OPERATION_ERROR;
12369 ch->chunk_flags = 0;
12372 struct mbuf *m_tmp = scm;
12375 /* get length of the err_cause chain */
12376 while (m_tmp != NULL) {
12377 cause_len += SCTP_BUF_LEN(m_tmp);
12378 m_tmp = SCTP_BUF_NEXT(m_tmp);
12380 len = SCTP_BUF_LEN(mout) + cause_len;
12381 if (cause_len % 4) {
12382 /* need pad at end of chunk */
12383 uint32_t cpthis = 0;
12386 padlen = 4 - (len % 4);
12387 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12390 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
12392 len = SCTP_BUF_LEN(mout);
12393 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
12396 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12398 sctp_m_freem(mout);
12402 if (iph_out != NULL) {
12406 /* zap the stack pointer to the route */
12407 bzero(&ro, sizeof ro);
12409 udp->uh_ulen = htons(len - sizeof(struct ip));
12411 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12416 /* set IPv4 length */
12417 iph_out->ip_len = len;
12419 #ifdef SCTP_PACKET_LOGGING
12420 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12421 sctp_packet_log(mout, len);
12423 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12425 #if defined(SCTP_WITH_NO_CSUM)
12426 SCTP_STAT_INCR(sctps_sendnocrc);
12428 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
12429 SCTP_STAT_INCR(sctps_sendswcrc);
12432 SCTP_ENABLE_UDP_CSUM(o_pak);
12435 #if defined(SCTP_WITH_NO_CSUM)
12436 SCTP_STAT_INCR(sctps_sendnocrc);
12438 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12439 mout->m_pkthdr.csum_data = 0;
12440 SCTP_STAT_INCR(sctps_sendhwcrc);
12443 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12445 /* Free the route if we got one back */
12451 if (ip6_out != NULL) {
12452 struct route_in6 ro;
12454 struct ifnet *ifp = NULL;
12456 /* zap the stack pointer to the route */
12457 bzero(&ro, sizeof(ro));
12459 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12461 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12462 #ifdef SCTP_PACKET_LOGGING
12463 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12464 sctp_packet_log(mout, len);
12466 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12468 #if defined(SCTP_WITH_NO_CSUM)
12469 SCTP_STAT_INCR(sctps_sendnocrc);
12471 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12472 SCTP_STAT_INCR(sctps_sendswcrc);
12474 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12475 udp->uh_sum = 0xffff;
12478 #if defined(SCTP_WITH_NO_CSUM)
12479 SCTP_STAT_INCR(sctps_sendnocrc);
12481 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12482 mout->m_pkthdr.csum_data = 0;
12483 SCTP_STAT_INCR(sctps_sendhwcrc);
12486 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12488 /* Free the route if we got one back */
12493 SCTP_STAT_INCR(sctps_sendpackets);
12494 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12495 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12498 static struct mbuf *
12499 sctp_copy_resume(struct uio *uio,
12501 int user_marks_eor,
12504 struct mbuf **new_tail)
12508 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12509 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12511 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12514 *sndout = m_length(m, NULL);
12515 *new_tail = m_last(m);
12521 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12528 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12530 if (sp->data == NULL) {
12531 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12534 sp->tail_mbuf = m_last(sp->data);
12540 static struct sctp_stream_queue_pending *
12541 sctp_copy_it_in(struct sctp_tcb *stcb,
12542 struct sctp_association *asoc,
12543 struct sctp_sndrcvinfo *srcv,
12545 struct sctp_nets *net,
12547 int user_marks_eor,
12551 * This routine must be very careful in its work. Protocol
12552 * processing is up and running so care must be taken to spl...()
12553 * when you need to do something that may effect the stcb/asoc. The
12554 * sb is locked however. When data is copied the protocol processing
12555 * should be enabled since this is a slower operation...
12557 struct sctp_stream_queue_pending *sp = NULL;
12561 /* Now can we send this? */
12562 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12563 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12564 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12565 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12566 /* got data while shutting down */
12567 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12568 *error = ECONNRESET;
12571 sctp_alloc_a_strmoq(stcb, sp);
12573 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12578 sp->sender_all_done = 0;
12579 sp->sinfo_flags = srcv->sinfo_flags;
12580 sp->timetolive = srcv->sinfo_timetolive;
12581 sp->ppid = srcv->sinfo_ppid;
12582 sp->context = srcv->sinfo_context;
12584 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12586 sp->stream = srcv->sinfo_stream;
12587 sp->length = min(uio->uio_resid, max_send_len);
12588 if ((sp->length == (uint32_t) uio->uio_resid) &&
12589 ((user_marks_eor == 0) ||
12590 (srcv->sinfo_flags & SCTP_EOF) ||
12591 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12592 sp->msg_is_complete = 1;
12594 sp->msg_is_complete = 0;
12596 sp->sender_all_done = 0;
12597 sp->some_taken = 0;
12598 sp->put_last_out = 0;
12599 resv_in_first = sizeof(struct sctp_data_chunk);
12600 sp->data = sp->tail_mbuf = NULL;
12601 if (sp->length == 0) {
12605 if (srcv->sinfo_keynumber_valid) {
12606 sp->auth_keyid = srcv->sinfo_keynumber;
12608 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12610 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12611 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12612 sp->holds_key_ref = 1;
12614 *error = sctp_copy_one(sp, uio, resv_in_first);
12617 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12620 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12622 atomic_add_int(&sp->net->ref_count, 1);
12626 sctp_set_prsctp_policy(sp);
12634 sctp_sosend(struct socket *so,
12635 struct sockaddr *addr,
12638 struct mbuf *control,
12643 int error, use_sndinfo = 0;
12644 struct sctp_sndrcvinfo sndrcvninfo;
12645 struct sockaddr *addr_to_use;
12647 #if defined(INET) && defined(INET6)
12648 struct sockaddr_in sin;
12653 /* process cmsg snd/rcv info (maybe a assoc-id) */
12654 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12655 sizeof(sndrcvninfo))) {
12660 addr_to_use = addr;
12661 #if defined(INET) && defined(INET6)
12662 if ((addr) && (addr->sa_family == AF_INET6)) {
12663 struct sockaddr_in6 *sin6;
12665 sin6 = (struct sockaddr_in6 *)addr;
12666 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12667 in6_sin6_2_sin(&sin, sin6);
12668 addr_to_use = (struct sockaddr *)&sin;
12672 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12675 use_sndinfo ? &sndrcvninfo : NULL
12683 sctp_lower_sosend(struct socket *so,
12684 struct sockaddr *addr,
12686 struct mbuf *i_pak,
12687 struct mbuf *control,
12689 struct sctp_sndrcvinfo *srcv
12694 unsigned int sndlen = 0, max_len;
12696 struct mbuf *top = NULL;
12697 int queue_only = 0, queue_only_for_init = 0;
12698 int free_cnt_applied = 0;
12700 int now_filled = 0;
12701 unsigned int inqueue_bytes = 0;
12702 struct sctp_block_entry be;
12703 struct sctp_inpcb *inp;
12704 struct sctp_tcb *stcb = NULL;
12705 struct timeval now;
12706 struct sctp_nets *net;
12707 struct sctp_association *asoc;
12708 struct sctp_inpcb *t_inp;
12709 int user_marks_eor;
12710 int create_lock_applied = 0;
12711 int nagle_applies = 0;
12712 int some_on_control = 0;
12713 int got_all_of_the_send = 0;
12714 int hold_tcblock = 0;
12715 int non_blocking = 0;
12716 uint32_t local_add_more, local_soresv = 0;
12718 uint16_t sinfo_flags;
12719 sctp_assoc_t sinfo_assoc_id;
12726 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12728 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12731 SCTP_RELEASE_PKT(i_pak);
12735 if ((uio == NULL) && (i_pak == NULL)) {
12736 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12739 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12740 atomic_add_int(&inp->total_sends, 1);
12742 if (uio->uio_resid < 0) {
12743 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12746 sndlen = uio->uio_resid;
12748 top = SCTP_HEADER_TO_CHAIN(i_pak);
12749 sndlen = SCTP_HEADER_LEN(i_pak);
12751 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12754 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12755 (inp->sctp_socket->so_qlimit)) {
12756 /* The listener can NOT send */
12757 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12762 * Pre-screen address, if one is given the sin-len
12763 * must be set correctly!
12766 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12768 switch (raddr->sa.sa_family) {
12771 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12772 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12776 port = raddr->sin.sin_port;
12781 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12782 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12786 port = raddr->sin6.sin6_port;
12790 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12791 error = EAFNOSUPPORT;
12798 sinfo_flags = srcv->sinfo_flags;
12799 sinfo_assoc_id = srcv->sinfo_assoc_id;
12800 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12801 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12802 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12806 if (srcv->sinfo_flags)
12807 SCTP_STAT_INCR(sctps_sends_with_flags);
12809 sinfo_flags = inp->def_send.sinfo_flags;
12810 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12812 if (sinfo_flags & SCTP_SENDALL) {
12813 /* its a sendall */
12814 error = sctp_sendall(inp, uio, top, srcv);
12818 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12819 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12823 /* now we must find the assoc */
12824 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12825 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12826 SCTP_INP_RLOCK(inp);
12827 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12829 SCTP_TCB_LOCK(stcb);
12832 SCTP_INP_RUNLOCK(inp);
12833 } else if (sinfo_assoc_id) {
12834 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12837 * Since we did not use findep we must
12838 * increment it, and if we don't find a tcb
12841 SCTP_INP_WLOCK(inp);
12842 SCTP_INP_INCR_REF(inp);
12843 SCTP_INP_WUNLOCK(inp);
12844 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12845 if (stcb == NULL) {
12846 SCTP_INP_WLOCK(inp);
12847 SCTP_INP_DECR_REF(inp);
12848 SCTP_INP_WUNLOCK(inp);
12853 if ((stcb == NULL) && (addr)) {
12854 /* Possible implicit send? */
12855 SCTP_ASOC_CREATE_LOCK(inp);
12856 create_lock_applied = 1;
12857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12858 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12859 /* Should I really unlock ? */
12860 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12865 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12866 (addr->sa_family == AF_INET6)) {
12867 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12871 SCTP_INP_WLOCK(inp);
12872 SCTP_INP_INCR_REF(inp);
12873 SCTP_INP_WUNLOCK(inp);
12874 /* With the lock applied look again */
12875 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12876 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12877 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12879 if (stcb == NULL) {
12880 SCTP_INP_WLOCK(inp);
12881 SCTP_INP_DECR_REF(inp);
12882 SCTP_INP_WUNLOCK(inp);
12889 if (t_inp != inp) {
12890 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12895 if (stcb == NULL) {
12896 if (addr == NULL) {
12897 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12901 /* We must go ahead and start the INIT process */
12904 if ((sinfo_flags & SCTP_ABORT) ||
12905 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12907 * User asks to abort a non-existant assoc,
12908 * or EOF a non-existant assoc with no data
12910 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12914 /* get an asoc/stcb struct */
12915 vrf_id = inp->def_vrf_id;
12917 if (create_lock_applied == 0) {
12918 panic("Error, should hold create lock and I don't?");
12921 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12924 if (stcb == NULL) {
12925 /* Error is setup for us in the call */
12928 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12929 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12931 * Set the connected flag so we can queue
12934 soisconnecting(so);
12937 if (create_lock_applied) {
12938 SCTP_ASOC_CREATE_UNLOCK(inp);
12939 create_lock_applied = 0;
12941 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12944 * Turn on queue only flag to prevent data from
12948 asoc = &stcb->asoc;
12949 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12950 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12952 /* initialize authentication params for the assoc */
12953 sctp_initialize_auth_params(inp, stcb);
12956 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12957 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12963 /* out with the INIT */
12964 queue_only_for_init = 1;
12966 * we may want to dig in after this call and adjust the MTU
12967 * value. It defaulted to 1500 (constant) but the ro
12968 * structure may now have an update and thus we may need to
12969 * change it BEFORE we append the message.
12973 asoc = &stcb->asoc;
12975 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12976 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12978 net = sctp_findnet(stcb, addr);
12981 if ((net == NULL) ||
12982 ((port != 0) && (port != stcb->rport))) {
12983 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12988 if (stcb->asoc.alternate) {
12989 net = stcb->asoc.alternate;
12991 net = stcb->asoc.primary_destination;
12994 atomic_add_int(&stcb->total_sends, 1);
12995 /* Keep the stcb from being freed under our feet */
12996 atomic_add_int(&asoc->refcnt, 1);
12997 free_cnt_applied = 1;
12999 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
13000 if (sndlen > asoc->smallest_mtu) {
13001 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13006 if (SCTP_SO_IS_NBIO(so)
13007 || (flags & MSG_NBIO)
13011 /* would we block? */
13012 if (non_blocking) {
13013 if (hold_tcblock == 0) {
13014 SCTP_TCB_LOCK(stcb);
13017 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13018 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
13019 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13020 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
13021 if (sndlen > SCTP_SB_LIMIT_SND(so))
13024 error = EWOULDBLOCK;
13027 stcb->asoc.sb_send_resv += sndlen;
13028 SCTP_TCB_UNLOCK(stcb);
13031 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
13033 local_soresv = sndlen;
13034 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13035 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13036 error = ECONNRESET;
13039 if (create_lock_applied) {
13040 SCTP_ASOC_CREATE_UNLOCK(inp);
13041 create_lock_applied = 0;
13043 if (asoc->stream_reset_outstanding) {
13045 * Can't queue any data while stream reset is underway.
13047 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
13051 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13052 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13055 /* we are now done with all control */
13057 sctp_m_freem(control);
13060 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
13061 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
13062 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
13063 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
13064 if (srcv->sinfo_flags & SCTP_ABORT) {
13067 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13068 error = ECONNRESET;
13072 /* Ok, we will attempt a msgsnd :> */
13074 p->td_ru.ru_msgsnd++;
13076 /* Are we aborting? */
13077 if (srcv->sinfo_flags & SCTP_ABORT) {
13079 int tot_demand, tot_out = 0, max_out;
13081 SCTP_STAT_INCR(sctps_sends_with_abort);
13082 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13083 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13084 /* It has to be up before we abort */
13085 /* how big is the user initiated abort? */
13086 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13090 if (hold_tcblock) {
13091 SCTP_TCB_UNLOCK(stcb);
13095 struct mbuf *cntm = NULL;
13097 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
13099 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
13100 tot_out += SCTP_BUF_LEN(cntm);
13104 /* Must fit in a MTU */
13106 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
13107 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
13109 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13113 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
13116 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
13120 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
13121 max_out -= sizeof(struct sctp_abort_msg);
13122 if (tot_out > max_out) {
13126 struct sctp_paramhdr *ph;
13128 /* now move forward the data pointer */
13129 ph = mtod(mm, struct sctp_paramhdr *);
13130 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13131 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
13133 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
13135 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13138 * Here if we can't get his data we
13139 * still abort we just don't get to
13140 * send the users note :-0
13147 SCTP_BUF_NEXT(mm) = top;
13151 if (hold_tcblock == 0) {
13152 SCTP_TCB_LOCK(stcb);
13154 atomic_add_int(&stcb->asoc.refcnt, -1);
13155 free_cnt_applied = 0;
13156 /* release this lock, otherwise we hang on ourselves */
13157 sctp_abort_an_association(stcb->sctp_ep, stcb,
13158 SCTP_RESPONSE_TO_USER_REQ,
13159 mm, SCTP_SO_LOCKED);
13160 /* now relock the stcb so everything is sane */
13164 * In this case top is already chained to mm avoid double
13165 * free, since we free it below if top != NULL and driver
13166 * would free it after sending the packet out
13173 /* Calculate the maximum we can send */
13174 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13175 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13176 if (non_blocking) {
13177 /* we already checked for non-blocking above. */
13180 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13185 if (hold_tcblock) {
13186 SCTP_TCB_UNLOCK(stcb);
13189 /* Is the stream no. valid? */
13190 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
13191 /* Invalid stream number */
13192 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13196 if (asoc->strmout == NULL) {
13197 /* huh? software error */
13198 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13202 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13203 if ((user_marks_eor == 0) &&
13204 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13205 /* It will NEVER fit */
13206 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13210 if ((uio == NULL) && user_marks_eor) {
13212 * We do not support eeor mode for
13213 * sending with mbuf chains (like sendfile).
13215 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13219 if (user_marks_eor) {
13220 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13223 * For non-eeor the whole message must fit in
13224 * the socket send buffer.
13226 local_add_more = sndlen;
13229 if (non_blocking) {
13230 goto skip_preblock;
13232 if (((max_len <= local_add_more) &&
13233 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13235 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13236 /* No room right now ! */
13237 SOCKBUF_LOCK(&so->so_snd);
13238 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13239 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13240 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13241 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13242 (unsigned int)SCTP_SB_LIMIT_SND(so),
13245 stcb->asoc.stream_queue_cnt,
13246 stcb->asoc.chunks_on_out_queue,
13247 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13248 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13249 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13252 stcb->block_entry = &be;
13253 error = sbwait(&so->so_snd);
13254 stcb->block_entry = NULL;
13255 if (error || so->so_error || be.error) {
13258 error = so->so_error;
13263 SOCKBUF_UNLOCK(&so->so_snd);
13266 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13267 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13268 asoc, stcb->asoc.total_output_queue_size);
13270 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13273 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13275 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13276 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13280 SOCKBUF_UNLOCK(&so->so_snd);
13283 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13287 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13288 * case NOTE: uio will be null when top/mbuf is passed
13291 if (srcv->sinfo_flags & SCTP_EOF) {
13292 got_all_of_the_send = 1;
13295 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13301 struct sctp_stream_queue_pending *sp;
13302 struct sctp_stream_out *strm;
13305 SCTP_TCB_SEND_LOCK(stcb);
13306 if ((asoc->stream_locked) &&
13307 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13308 SCTP_TCB_SEND_UNLOCK(stcb);
13309 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13313 SCTP_TCB_SEND_UNLOCK(stcb);
13315 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13316 if (strm->last_msg_incomplete == 0) {
13318 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13319 if ((sp == NULL) || (error)) {
13322 SCTP_TCB_SEND_LOCK(stcb);
13323 if (sp->msg_is_complete) {
13324 strm->last_msg_incomplete = 0;
13325 asoc->stream_locked = 0;
13328 * Just got locked to this guy in case of an
13331 strm->last_msg_incomplete = 1;
13332 asoc->stream_locked = 1;
13333 asoc->stream_locked_on = srcv->sinfo_stream;
13334 sp->sender_all_done = 0;
13336 sctp_snd_sb_alloc(stcb, sp->length);
13337 atomic_add_int(&asoc->stream_queue_cnt, 1);
13338 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
13339 sp->strseq = strm->next_sequence_sent;
13340 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
13341 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
13342 (uintptr_t) stcb, sp->length,
13343 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
13345 strm->next_sequence_sent++;
13347 SCTP_STAT_INCR(sctps_sends_with_unord);
13349 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13350 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13351 SCTP_TCB_SEND_UNLOCK(stcb);
13353 SCTP_TCB_SEND_LOCK(stcb);
13354 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13355 SCTP_TCB_SEND_UNLOCK(stcb);
13357 /* ???? Huh ??? last msg is gone */
13359 panic("Warning: Last msg marked incomplete, yet nothing left?");
13361 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13362 strm->last_msg_incomplete = 0;
13368 while (uio->uio_resid > 0) {
13369 /* How much room do we have? */
13370 struct mbuf *new_tail, *mm;
13372 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13373 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13377 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13378 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13379 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13382 if (hold_tcblock) {
13383 SCTP_TCB_UNLOCK(stcb);
13386 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13387 if ((mm == NULL) || error) {
13393 /* Update the mbuf and count */
13394 SCTP_TCB_SEND_LOCK(stcb);
13395 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13397 * we need to get out. Peer probably
13401 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13402 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13403 error = ECONNRESET;
13405 SCTP_TCB_SEND_UNLOCK(stcb);
13408 if (sp->tail_mbuf) {
13409 /* tack it to the end */
13410 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13411 sp->tail_mbuf = new_tail;
13413 /* A stolen mbuf */
13415 sp->tail_mbuf = new_tail;
13417 sctp_snd_sb_alloc(stcb, sndout);
13418 atomic_add_int(&sp->length, sndout);
13421 /* Did we reach EOR? */
13422 if ((uio->uio_resid == 0) &&
13423 ((user_marks_eor == 0) ||
13424 (srcv->sinfo_flags & SCTP_EOF) ||
13425 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13426 sp->msg_is_complete = 1;
13428 sp->msg_is_complete = 0;
13430 SCTP_TCB_SEND_UNLOCK(stcb);
13432 if (uio->uio_resid == 0) {
13437 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
13439 * This is ugly but we must assure locking
13442 if (hold_tcblock == 0) {
13443 SCTP_TCB_LOCK(stcb);
13446 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13447 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13448 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13449 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13455 SCTP_TCB_UNLOCK(stcb);
13458 /* wait for space now */
13459 if (non_blocking) {
13460 /* Non-blocking io in place out */
13463 /* What about the INIT, send it maybe */
13464 if (queue_only_for_init) {
13465 if (hold_tcblock == 0) {
13466 SCTP_TCB_LOCK(stcb);
13469 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13470 /* a collision took us forward? */
13473 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13474 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13478 if ((net->flight_size > net->cwnd) &&
13479 (asoc->sctp_cmt_on_off == 0)) {
13480 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13482 } else if (asoc->ifp_had_enobuf) {
13483 SCTP_STAT_INCR(sctps_ifnomemqueued);
13484 if (net->flight_size > (2 * net->mtu)) {
13487 asoc->ifp_had_enobuf = 0;
13489 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13490 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13491 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13492 (stcb->asoc.total_flight > 0) &&
13493 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13494 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13497 * Ok, Nagle is set on and we have data outstanding.
13498 * Don't send anything and let SACKs drive out the
13499 * data unless wen have a "full" segment to send.
13501 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13502 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13504 SCTP_STAT_INCR(sctps_naglequeued);
13507 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13508 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13509 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13511 SCTP_STAT_INCR(sctps_naglesent);
13514 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_for_init)
13523 queue_only_for_init = 0;
13524 if ((queue_only == 0) && (nagle_applies == 0)) {
13526 * need to start chunk output
13527 * before blocking.. note that if
13528 * a lock is already applied, then
13529 * the input via the net is happening
13530 * and I don't need to start output :-D
13532 if (hold_tcblock == 0) {
13533 if (SCTP_TCB_TRYLOCK(stcb)) {
13535 sctp_chunk_output(inp,
13537 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13540 sctp_chunk_output(inp,
13542 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13544 if (hold_tcblock == 1) {
13545 SCTP_TCB_UNLOCK(stcb);
13549 SOCKBUF_LOCK(&so->so_snd);
13551 * This is a bit strange, but I think it will
13552 * work. The total_output_queue_size is locked and
13553 * protected by the TCB_LOCK, which we just released.
13554 * There is a race that can occur between releasing it
13555 * above, and me getting the socket lock, where sacks
13556 * come in but we have not put the SB_WAIT on the
13557 * so_snd buffer to get the wakeup. After the LOCK
13558 * is applied the sack_processing will also need to
13559 * LOCK the so->so_snd to do the actual sowwakeup(). So
13560 * once we have the socket buffer lock if we recheck the
13561 * size we KNOW we will get to sleep safely with the
13562 * wakeup flag in place.
13564 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13565 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13566 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13567 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13568 asoc, uio->uio_resid);
13571 stcb->block_entry = &be;
13572 error = sbwait(&so->so_snd);
13573 stcb->block_entry = NULL;
13575 if (error || so->so_error || be.error) {
13578 error = so->so_error;
13583 SOCKBUF_UNLOCK(&so->so_snd);
13586 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13587 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13588 asoc, stcb->asoc.total_output_queue_size);
13591 SOCKBUF_UNLOCK(&so->so_snd);
13592 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13596 SCTP_TCB_SEND_LOCK(stcb);
13598 if (sp->msg_is_complete == 0) {
13599 strm->last_msg_incomplete = 1;
13600 asoc->stream_locked = 1;
13601 asoc->stream_locked_on = srcv->sinfo_stream;
13603 sp->sender_all_done = 1;
13604 strm->last_msg_incomplete = 0;
13605 asoc->stream_locked = 0;
13608 SCTP_PRINTF("Huh no sp TSNH?\n");
13609 strm->last_msg_incomplete = 0;
13610 asoc->stream_locked = 0;
13612 SCTP_TCB_SEND_UNLOCK(stcb);
13613 if (uio->uio_resid == 0) {
13614 got_all_of_the_send = 1;
13617 /* We send in a 0, since we do NOT have any locks */
13618 error = sctp_msg_append(stcb, net, top, srcv, 0);
13620 if (srcv->sinfo_flags & SCTP_EOF) {
13622 * This should only happen for Panda for the mbuf
13623 * send case, which does NOT yet support EEOR mode.
13624 * Thus, we can just set this flag to do the proper
13627 got_all_of_the_send = 1;
13635 if ((srcv->sinfo_flags & SCTP_EOF) &&
13636 (got_all_of_the_send == 1) &&
13637 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
13640 SCTP_STAT_INCR(sctps_sends_with_eof);
13642 if (hold_tcblock == 0) {
13643 SCTP_TCB_LOCK(stcb);
13646 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13647 if (TAILQ_EMPTY(&asoc->send_queue) &&
13648 TAILQ_EMPTY(&asoc->sent_queue) &&
13650 if (asoc->locked_on_sending) {
13653 /* there is nothing queued to send, so I'm done... */
13654 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13655 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13656 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13657 struct sctp_nets *netp;
13659 if (stcb->asoc.alternate) {
13660 netp = stcb->asoc.alternate;
13662 netp = stcb->asoc.primary_destination;
13664 /* only send SHUTDOWN the first time through */
13665 sctp_send_shutdown(stcb, netp);
13666 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13667 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13669 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13670 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13671 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13673 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13674 asoc->primary_destination);
13678 * we still got (or just got) data to send, so set
13682 * XXX sockets draft says that SCTP_EOF should be
13683 * sent with no data. currently, we will allow user
13684 * data to be sent first and move to
13687 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13688 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13689 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13690 if (hold_tcblock == 0) {
13691 SCTP_TCB_LOCK(stcb);
13694 if (asoc->locked_on_sending) {
13695 /* Locked to send out the data */
13696 struct sctp_stream_queue_pending *sp;
13698 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13700 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13701 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13704 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13705 if (TAILQ_EMPTY(&asoc->send_queue) &&
13706 TAILQ_EMPTY(&asoc->sent_queue) &&
13707 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13709 if (free_cnt_applied) {
13710 atomic_add_int(&stcb->asoc.refcnt, -1);
13711 free_cnt_applied = 0;
13713 sctp_abort_an_association(stcb->sctp_ep, stcb,
13714 SCTP_RESPONSE_TO_USER_REQ,
13715 NULL, SCTP_SO_LOCKED);
13717 * now relock the stcb so everything
13724 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13725 asoc->primary_destination);
13726 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13731 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13732 some_on_control = 1;
13734 if (queue_only_for_init) {
13735 if (hold_tcblock == 0) {
13736 SCTP_TCB_LOCK(stcb);
13739 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13740 /* a collision took us forward? */
13743 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13744 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13748 if ((net->flight_size > net->cwnd) &&
13749 (stcb->asoc.sctp_cmt_on_off == 0)) {
13750 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13752 } else if (asoc->ifp_had_enobuf) {
13753 SCTP_STAT_INCR(sctps_ifnomemqueued);
13754 if (net->flight_size > (2 * net->mtu)) {
13757 asoc->ifp_had_enobuf = 0;
13759 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13760 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13761 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13762 (stcb->asoc.total_flight > 0) &&
13763 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13764 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13766 * Ok, Nagle is set on and we have data outstanding.
13767 * Don't send anything and let SACKs drive out the
13768 * data unless wen have a "full" segment to send.
13770 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13771 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13773 SCTP_STAT_INCR(sctps_naglequeued);
13776 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13777 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13778 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13780 SCTP_STAT_INCR(sctps_naglesent);
13783 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13784 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13785 nagle_applies, un_sent);
13786 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13787 stcb->asoc.total_flight,
13788 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13790 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13791 /* we can attempt to send too. */
13792 if (hold_tcblock == 0) {
13794 * If there is activity recv'ing sacks no need to
13797 if (SCTP_TCB_TRYLOCK(stcb)) {
13798 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13802 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13804 } else if ((queue_only == 0) &&
13805 (stcb->asoc.peers_rwnd == 0) &&
13806 (stcb->asoc.total_flight == 0)) {
13807 /* We get to have a probe outstanding */
13808 if (hold_tcblock == 0) {
13810 SCTP_TCB_LOCK(stcb);
13812 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13813 } else if (some_on_control) {
13814 int num_out, reason, frag_point;
13816 /* Here we do control only */
13817 if (hold_tcblock == 0) {
13819 SCTP_TCB_LOCK(stcb);
13821 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13822 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13823 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13825 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13826 queue_only, stcb->asoc.peers_rwnd, un_sent,
13827 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13828 stcb->asoc.total_output_queue_size, error);
13833 if (local_soresv && stcb) {
13834 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13836 if (create_lock_applied) {
13837 SCTP_ASOC_CREATE_UNLOCK(inp);
13839 if ((stcb) && hold_tcblock) {
13840 SCTP_TCB_UNLOCK(stcb);
13842 if (stcb && free_cnt_applied) {
13843 atomic_add_int(&stcb->asoc.refcnt, -1);
13847 if (mtx_owned(&stcb->tcb_mtx)) {
13848 panic("Leaving with tcb mtx owned?");
13850 if (mtx_owned(&stcb->tcb_send_mtx)) {
13851 panic("Leaving with tcb send mtx owned?");
13857 sctp_validate_no_locks(inp);
13859 printf("Warning - inp is NULL so cant validate locks\n");
13866 sctp_m_freem(control);
13873 * generate an AUTHentication chunk, if required
13876 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13877 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13878 struct sctp_tcb *stcb, uint8_t chunk)
13880 struct mbuf *m_auth;
13881 struct sctp_auth_chunk *auth;
13885 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13889 /* sysctl disabled auth? */
13890 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13893 /* peer doesn't do auth... */
13894 if (!stcb->asoc.peer_supports_auth) {
13897 /* does the requested chunk require auth? */
13898 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13901 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13902 if (m_auth == NULL) {
13906 /* reserve some space if this will be the first mbuf */
13908 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13909 /* fill in the AUTH chunk details */
13910 auth = mtod(m_auth, struct sctp_auth_chunk *);
13911 bzero(auth, sizeof(*auth));
13912 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13913 auth->ch.chunk_flags = 0;
13914 chunk_len = sizeof(*auth) +
13915 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13916 auth->ch.chunk_length = htons(chunk_len);
13917 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13918 /* key id and hmac digest will be computed and filled in upon send */
13920 /* save the offset where the auth was inserted into the chain */
13922 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13923 *offset += SCTP_BUF_LEN(cn);
13926 /* update length and return pointer to the auth chunk */
13927 SCTP_BUF_LEN(m_auth) = chunk_len;
13928 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13929 if (auth_ret != NULL)
13937 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13939 struct nd_prefix *pfx = NULL;
13940 struct nd_pfxrouter *pfxrtr = NULL;
13941 struct sockaddr_in6 gw6;
13943 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13946 /* get prefix entry of address */
13947 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13948 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13950 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13951 &src6->sin6_addr, &pfx->ndpr_mask))
13954 /* no prefix entry in the prefix list */
13956 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13957 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13960 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13961 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13963 /* search installed gateway from prefix entry */
13964 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13965 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13966 gw6.sin6_family = AF_INET6;
13967 gw6.sin6_len = sizeof(struct sockaddr_in6);
13968 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13969 sizeof(struct in6_addr));
13970 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13971 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13972 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13973 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13974 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13975 ro->ro_rt->rt_gateway)) {
13976 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13980 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13987 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13990 struct sockaddr_in *sin, *mask;
13991 struct ifaddr *ifa;
13992 struct in_addr srcnetaddr, gwnetaddr;
13994 if (ro == NULL || ro->ro_rt == NULL ||
13995 sifa->address.sa.sa_family != AF_INET) {
13998 ifa = (struct ifaddr *)sifa->ifa;
13999 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
14000 sin = (struct sockaddr_in *)&sifa->address.sin;
14001 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
14002 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
14003 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
14004 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
14006 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
14007 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
14008 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
14009 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
14010 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
14011 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {