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_keynumber;
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) {
3717 for (mat = copy_init; mat; mat = SCTP_BUF_NEXT(mat)) {
3718 if (SCTP_BUF_IS_EXTENDED(mat)) {
3719 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3724 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3726 if (copy_initack == NULL) {
3728 sctp_m_freem(copy_init);
3731 #ifdef SCTP_MBUF_LOGGING
3732 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3735 for (mat = copy_initack; mat; mat = SCTP_BUF_NEXT(mat)) {
3736 if (SCTP_BUF_IS_EXTENDED(mat)) {
3737 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
3742 /* easy side we just drop it on the end */
3743 ph = mtod(mret, struct sctp_paramhdr *);
3744 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3745 sizeof(struct sctp_paramhdr);
3746 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3747 sizeof(struct sctp_paramhdr));
3748 ph->param_type = htons(SCTP_STATE_COOKIE);
3749 ph->param_length = 0; /* fill in at the end */
3750 /* Fill in the stc cookie data */
3751 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3753 /* tack the INIT and then the INIT-ACK onto the chain */
3755 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3756 cookie_sz += SCTP_BUF_LEN(m_at);
3757 if (SCTP_BUF_NEXT(m_at) == NULL) {
3758 SCTP_BUF_NEXT(m_at) = copy_init;
3762 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3763 cookie_sz += SCTP_BUF_LEN(m_at);
3764 if (SCTP_BUF_NEXT(m_at) == NULL) {
3765 SCTP_BUF_NEXT(m_at) = copy_initack;
3769 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3770 cookie_sz += SCTP_BUF_LEN(m_at);
3771 if (SCTP_BUF_NEXT(m_at) == NULL) {
3775 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_DONTWAIT, 1, MT_DATA);
3777 /* no space, so free the entire chain */
3781 SCTP_BUF_LEN(sig) = 0;
3782 SCTP_BUF_NEXT(m_at) = sig;
3784 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3785 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3787 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3788 cookie_sz += SCTP_SIGNATURE_SIZE;
3789 ph->param_length = htons(cookie_sz);
3795 sctp_get_ect(struct sctp_tcb *stcb)
3797 if ((stcb != NULL) && (stcb->asoc.ecn_allowed == 1)) {
3798 return (SCTP_ECT0_BIT);
3805 sctp_handle_no_route(struct sctp_tcb *stcb,
3806 struct sctp_nets *net,
3809 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3812 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3813 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3814 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3815 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3816 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", net);
3817 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3819 SCTP_FAILED_THRESHOLD,
3822 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3823 net->dest_state &= ~SCTP_ADDR_PF;
3827 if (net == stcb->asoc.primary_destination) {
3828 /* need a new primary */
3829 struct sctp_nets *alt;
3831 alt = sctp_find_alternate_net(stcb, net, 0);
3833 if (stcb->asoc.alternate) {
3834 sctp_free_remote_addr(stcb->asoc.alternate);
3836 stcb->asoc.alternate = alt;
3837 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3838 if (net->ro._s_addr) {
3839 sctp_free_ifa(net->ro._s_addr);
3840 net->ro._s_addr = NULL;
3842 net->src_addr_selected = 0;
3850 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3851 struct sctp_tcb *stcb, /* may be NULL */
3852 struct sctp_nets *net,
3853 struct sockaddr *to,
3855 uint32_t auth_offset,
3856 struct sctp_auth_chunk *auth,
3857 uint16_t auth_keyid,
3858 int nofragment_flag,
3865 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3866 int so_locked SCTP_UNUSED,
3870 union sctp_sockstore *over_addr,
3873 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3876 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3877 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
3878 * - fill in the HMAC digest of any AUTH chunk in the packet.
3879 * - calculate and fill in the SCTP checksum.
3880 * - prepend an IP address header.
3881 * - if boundall use INADDR_ANY.
3882 * - if boundspecific do source address selection.
3883 * - set fragmentation option for ipV4.
3884 * - On return from IP output, check/adjust mtu size of output
3885 * interface and smallest_mtu size as well.
3887 /* Will need ifdefs around this */
3890 struct sctphdr *sctphdr;
3894 sctp_route_t *ro = NULL;
3895 struct udphdr *udp = NULL;
3898 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
3899 struct socket *so = NULL;
3903 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
3904 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
3909 vrf_id = stcb->asoc.vrf_id;
3911 vrf_id = inp->def_vrf_id;
3914 /* fill in the HMAC digest for any AUTH chunk in the packet */
3915 if ((auth != NULL) && (stcb != NULL)) {
3916 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
3919 tos_value = net->dscp;
3921 tos_value = stcb->asoc.default_dscp;
3923 tos_value = inp->sctp_ep.default_dscp;
3926 switch (to->sa_family) {
3930 struct ip *ip = NULL;
3931 sctp_route_t iproute;
3934 len = sizeof(struct ip) + sizeof(struct sctphdr);
3936 len += sizeof(struct udphdr);
3938 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
3941 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
3944 SCTP_ALIGN_TO_END(newm, len);
3945 SCTP_BUF_LEN(newm) = len;
3946 SCTP_BUF_NEXT(newm) = m;
3950 if (net->flowidset == 0) {
3951 panic("Flow ID not set");
3954 m->m_pkthdr.flowid = net->flowid;
3955 m->m_flags |= M_FLOWID;
3957 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
3958 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
3959 m->m_flags |= M_FLOWID;
3962 packet_length = sctp_calculate_len(m);
3963 ip = mtod(m, struct ip *);
3964 ip->ip_v = IPVERSION;
3965 ip->ip_hl = (sizeof(struct ip) >> 2);
3966 if (tos_value == 0) {
3968 * This means especially, that it is not set
3969 * at the SCTP layer. So use the value from
3972 tos_value = inp->ip_inp.inp.inp_ip_tos;
3976 tos_value |= sctp_get_ect(stcb);
3978 if ((nofragment_flag) && (port == 0)) {
3983 /* FreeBSD has a function for ip_id's */
3984 ip->ip_id = ip_newid();
3986 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
3987 ip->ip_len = packet_length;
3988 ip->ip_tos = tos_value;
3990 ip->ip_p = IPPROTO_UDP;
3992 ip->ip_p = IPPROTO_SCTP;
3997 memset(&iproute, 0, sizeof(iproute));
3998 memcpy(&ro->ro_dst, to, to->sa_len);
4000 ro = (sctp_route_t *) & net->ro;
4002 /* Now the address selection part */
4003 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4005 /* call the routine to select the src address */
4006 if (net && out_of_asoc_ok == 0) {
4007 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4008 sctp_free_ifa(net->ro._s_addr);
4009 net->ro._s_addr = NULL;
4010 net->src_addr_selected = 0;
4016 if (net->src_addr_selected == 0) {
4017 /* Cache the source address */
4018 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4021 net->src_addr_selected = 1;
4023 if (net->ro._s_addr == NULL) {
4024 /* No route to host */
4025 net->src_addr_selected = 0;
4026 sctp_handle_no_route(stcb, net, so_locked);
4027 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4029 return (EHOSTUNREACH);
4031 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4033 if (over_addr == NULL) {
4034 struct sctp_ifa *_lsrc;
4036 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4040 if (_lsrc == NULL) {
4041 sctp_handle_no_route(stcb, net, so_locked);
4042 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4044 return (EHOSTUNREACH);
4046 ip->ip_src = _lsrc->address.sin.sin_addr;
4047 sctp_free_ifa(_lsrc);
4049 ip->ip_src = over_addr->sin.sin_addr;
4050 SCTP_RTALLOC(ro, vrf_id);
4054 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4055 sctp_handle_no_route(stcb, net, so_locked);
4056 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4058 return (EHOSTUNREACH);
4060 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4061 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4062 udp->uh_dport = port;
4063 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4065 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4069 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4071 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4074 sctphdr->src_port = src_port;
4075 sctphdr->dest_port = dest_port;
4076 sctphdr->v_tag = v_tag;
4077 sctphdr->checksum = 0;
4080 * If source address selection fails and we find no
4081 * route then the ip_output should fail as well with
4082 * a NO_ROUTE_TO_HOST type error. We probably should
4083 * catch that somewhere and abort the association
4084 * right away (assuming this is an INIT being sent).
4086 if (ro->ro_rt == NULL) {
4088 * src addr selection failed to find a route
4089 * (or valid source addr), so we can't get
4090 * there from here (yet)!
4092 sctp_handle_no_route(stcb, net, so_locked);
4093 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4095 return (EHOSTUNREACH);
4097 if (ro != &iproute) {
4098 memcpy(&iproute, ro, sizeof(*ro));
4100 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4101 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4102 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4103 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4104 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4107 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4108 /* failed to prepend data, give up */
4109 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4113 #ifdef SCTP_PACKET_LOGGING
4114 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4115 sctp_packet_log(m, packet_length);
4117 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4119 #if defined(SCTP_WITH_NO_CSUM)
4120 SCTP_STAT_INCR(sctps_sendnocrc);
4122 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4124 (stcb->asoc.loopback_scope))) {
4125 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4126 SCTP_STAT_INCR(sctps_sendswcrc);
4128 SCTP_STAT_INCR(sctps_sendnocrc);
4132 SCTP_ENABLE_UDP_CSUM(o_pak);
4135 #if defined(SCTP_WITH_NO_CSUM)
4136 SCTP_STAT_INCR(sctps_sendnocrc);
4138 m->m_pkthdr.csum_flags = CSUM_SCTP;
4139 m->m_pkthdr.csum_data = 0;
4140 SCTP_STAT_INCR(sctps_sendhwcrc);
4143 /* send it out. table id is taken from stcb */
4144 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4145 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4146 so = SCTP_INP_SO(inp);
4147 SCTP_SOCKET_UNLOCK(so, 0);
4150 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4151 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4152 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4153 atomic_add_int(&stcb->asoc.refcnt, 1);
4154 SCTP_TCB_UNLOCK(stcb);
4155 SCTP_SOCKET_LOCK(so, 0);
4156 SCTP_TCB_LOCK(stcb);
4157 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4160 SCTP_STAT_INCR(sctps_sendpackets);
4161 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4163 SCTP_STAT_INCR(sctps_senderrors);
4165 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4167 /* free tempy routes */
4174 * PMTU check versus smallest asoc MTU goes
4177 if ((ro->ro_rt != NULL) &&
4178 (net->ro._s_addr)) {
4181 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4183 mtu -= sizeof(struct udphdr);
4185 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4186 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4189 } else if (ro->ro_rt == NULL) {
4190 /* route was freed */
4191 if (net->ro._s_addr &&
4192 net->src_addr_selected) {
4193 sctp_free_ifa(net->ro._s_addr);
4194 net->ro._s_addr = NULL;
4196 net->src_addr_selected = 0;
4205 uint32_t flowlabel, flowinfo;
4206 struct ip6_hdr *ip6h;
4207 struct route_in6 ip6route;
4209 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4211 struct sockaddr_in6 lsa6_storage;
4213 u_short prev_port = 0;
4217 flowlabel = net->flowlabel;
4219 flowlabel = stcb->asoc.default_flowlabel;
4221 flowlabel = inp->sctp_ep.default_flowlabel;
4223 if (flowlabel == 0) {
4225 * This means especially, that it is not set
4226 * at the SCTP layer. So use the value from
4229 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4231 flowlabel &= 0x000fffff;
4232 len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr);
4234 len += sizeof(struct udphdr);
4236 newm = sctp_get_mbuf_for_msg(len, 1, M_DONTWAIT, 1, MT_DATA);
4239 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4242 SCTP_ALIGN_TO_END(newm, len);
4243 SCTP_BUF_LEN(newm) = len;
4244 SCTP_BUF_NEXT(newm) = m;
4248 if (net->flowidset == 0) {
4249 panic("Flow ID not set");
4252 m->m_pkthdr.flowid = net->flowid;
4253 m->m_flags |= M_FLOWID;
4255 if ((init != NULL) && (init->m_flags & M_FLOWID)) {
4256 m->m_pkthdr.flowid = init->m_pkthdr.flowid;
4257 m->m_flags |= M_FLOWID;
4260 packet_length = sctp_calculate_len(m);
4262 ip6h = mtod(m, struct ip6_hdr *);
4263 /* protect *sin6 from overwrite */
4264 sin6 = (struct sockaddr_in6 *)to;
4268 /* KAME hack: embed scopeid */
4269 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4270 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4274 memset(&ip6route, 0, sizeof(ip6route));
4275 ro = (sctp_route_t *) & ip6route;
4276 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4278 ro = (sctp_route_t *) & net->ro;
4281 * We assume here that inp_flow is in host byte
4282 * order within the TCB!
4284 if (tos_value == 0) {
4286 * This means especially, that it is not set
4287 * at the SCTP layer. So use the value from
4290 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4294 tos_value |= sctp_get_ect(stcb);
4298 flowinfo |= tos_value;
4300 flowinfo |= flowlabel;
4301 ip6h->ip6_flow = htonl(flowinfo);
4303 ip6h->ip6_nxt = IPPROTO_UDP;
4305 ip6h->ip6_nxt = IPPROTO_SCTP;
4307 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4308 ip6h->ip6_dst = sin6->sin6_addr;
4311 * Add SRC address selection here: we can only reuse
4312 * to a limited degree the kame src-addr-sel, since
4313 * we can try their selection but it may not be
4316 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4317 lsa6_tmp.sin6_family = AF_INET6;
4318 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4320 if (net && out_of_asoc_ok == 0) {
4321 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4322 sctp_free_ifa(net->ro._s_addr);
4323 net->ro._s_addr = NULL;
4324 net->src_addr_selected = 0;
4330 if (net->src_addr_selected == 0) {
4331 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4332 /* KAME hack: embed scopeid */
4333 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4334 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4337 /* Cache the source address */
4338 net->ro._s_addr = sctp_source_address_selection(inp,
4344 (void)sa6_recoverscope(sin6);
4345 net->src_addr_selected = 1;
4347 if (net->ro._s_addr == NULL) {
4348 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4349 net->src_addr_selected = 0;
4350 sctp_handle_no_route(stcb, net, so_locked);
4351 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4353 return (EHOSTUNREACH);
4355 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4357 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4358 /* KAME hack: embed scopeid */
4359 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4360 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4363 if (over_addr == NULL) {
4364 struct sctp_ifa *_lsrc;
4366 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4370 if (_lsrc == NULL) {
4371 sctp_handle_no_route(stcb, net, so_locked);
4372 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4374 return (EHOSTUNREACH);
4376 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4377 sctp_free_ifa(_lsrc);
4379 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4380 SCTP_RTALLOC(ro, vrf_id);
4382 (void)sa6_recoverscope(sin6);
4384 lsa6->sin6_port = inp->sctp_lport;
4386 if (ro->ro_rt == NULL) {
4388 * src addr selection failed to find a route
4389 * (or valid source addr), so we can't get
4392 sctp_handle_no_route(stcb, net, so_locked);
4393 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4395 return (EHOSTUNREACH);
4398 * XXX: sa6 may not have a valid sin6_scope_id in
4399 * the non-SCOPEDROUTING case.
4401 bzero(&lsa6_storage, sizeof(lsa6_storage));
4402 lsa6_storage.sin6_family = AF_INET6;
4403 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4404 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4405 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4406 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4411 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4412 lsa6_storage.sin6_port = inp->sctp_lport;
4413 lsa6 = &lsa6_storage;
4414 ip6h->ip6_src = lsa6->sin6_addr;
4417 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4418 sctp_handle_no_route(stcb, net, so_locked);
4419 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4421 return (EHOSTUNREACH);
4423 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4424 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4425 udp->uh_dport = port;
4426 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4428 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4430 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4433 sctphdr->src_port = src_port;
4434 sctphdr->dest_port = dest_port;
4435 sctphdr->v_tag = v_tag;
4436 sctphdr->checksum = 0;
4439 * We set the hop limit now since there is a good
4440 * chance that our ro pointer is now filled
4442 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4443 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4446 /* Copy to be sure something bad is not happening */
4447 sin6->sin6_addr = ip6h->ip6_dst;
4448 lsa6->sin6_addr = ip6h->ip6_src;
4451 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4452 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4453 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4454 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4455 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4457 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4459 * preserve the port and scope for link
4462 prev_scope = sin6->sin6_scope_id;
4463 prev_port = sin6->sin6_port;
4465 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4466 /* failed to prepend data, give up */
4468 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4471 #ifdef SCTP_PACKET_LOGGING
4472 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4473 sctp_packet_log(m, packet_length);
4475 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4477 #if defined(SCTP_WITH_NO_CSUM)
4478 SCTP_STAT_INCR(sctps_sendnocrc);
4480 if (!(SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) &&
4482 (stcb->asoc.loopback_scope))) {
4483 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4484 SCTP_STAT_INCR(sctps_sendswcrc);
4486 SCTP_STAT_INCR(sctps_sendnocrc);
4489 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4490 udp->uh_sum = 0xffff;
4493 #if defined(SCTP_WITH_NO_CSUM)
4494 SCTP_STAT_INCR(sctps_sendnocrc);
4496 m->m_pkthdr.csum_flags = CSUM_SCTP;
4497 m->m_pkthdr.csum_data = 0;
4498 SCTP_STAT_INCR(sctps_sendhwcrc);
4501 /* send it out. table id is taken from stcb */
4502 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4503 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4504 so = SCTP_INP_SO(inp);
4505 SCTP_SOCKET_UNLOCK(so, 0);
4508 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4509 #if defined (__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4510 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4511 atomic_add_int(&stcb->asoc.refcnt, 1);
4512 SCTP_TCB_UNLOCK(stcb);
4513 SCTP_SOCKET_LOCK(so, 0);
4514 SCTP_TCB_LOCK(stcb);
4515 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4519 /* for link local this must be done */
4520 sin6->sin6_scope_id = prev_scope;
4521 sin6->sin6_port = prev_port;
4523 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4524 SCTP_STAT_INCR(sctps_sendpackets);
4525 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4527 SCTP_STAT_INCR(sctps_senderrors);
4530 /* Now if we had a temp route free it */
4536 * PMTU check versus smallest asoc MTU goes
4539 if (ro->ro_rt == NULL) {
4540 /* Route was freed */
4541 if (net->ro._s_addr &&
4542 net->src_addr_selected) {
4543 sctp_free_ifa(net->ro._s_addr);
4544 net->ro._s_addr = NULL;
4546 net->src_addr_selected = 0;
4548 if ((ro->ro_rt != NULL) &&
4549 (net->ro._s_addr)) {
4552 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4554 (stcb->asoc.smallest_mtu > mtu)) {
4555 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4558 net->mtu -= sizeof(struct udphdr);
4562 if (ND_IFINFO(ifp)->linkmtu &&
4563 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4564 sctp_mtu_size_reset(inp,
4566 ND_IFINFO(ifp)->linkmtu);
4574 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4575 ((struct sockaddr *)to)->sa_family);
4577 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4584 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4585 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4590 struct mbuf *m, *m_at, *mp_last;
4591 struct sctp_nets *net;
4592 struct sctp_init_chunk *init;
4593 struct sctp_supported_addr_param *sup_addr;
4594 struct sctp_adaptation_layer_indication *ali;
4595 struct sctp_ecn_supported_param *ecn;
4596 struct sctp_prsctp_supported_param *prsctp;
4597 struct sctp_supported_chunk_types_param *pr_supported;
4598 int cnt_inits_to = 0;
4603 /* INIT's always go to the primary (and usually ONLY address) */
4605 net = stcb->asoc.primary_destination;
4607 net = TAILQ_FIRST(&stcb->asoc.nets);
4612 /* we confirm any address we send an INIT to */
4613 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4614 (void)sctp_set_primary_addr(stcb, NULL, net);
4616 /* we confirm any address we send an INIT to */
4617 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4619 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4621 if (((struct sockaddr *)&(net->ro._l_addr))->sa_family == AF_INET6) {
4623 * special hook, if we are sending to link local it will not
4624 * show up in our private address count.
4626 struct sockaddr_in6 *sin6l;
4628 sin6l = &net->ro._l_addr.sin6;
4629 if (IN6_IS_ADDR_LINKLOCAL(&sin6l->sin6_addr))
4633 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4634 /* This case should not happen */
4635 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4638 /* start the INIT timer */
4639 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4641 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_DONTWAIT, 1, MT_DATA);
4643 /* No memory, INIT timer will re-attempt. */
4644 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4647 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
4649 * assume peer supports asconf in order to be able to queue local
4650 * address changes while an INIT is in flight and before the assoc
4653 stcb->asoc.peer_supports_asconf = 1;
4654 /* Now lets put the SCTP header in place */
4655 init = mtod(m, struct sctp_init_chunk *);
4656 /* now the chunk header */
4657 init->ch.chunk_type = SCTP_INITIATION;
4658 init->ch.chunk_flags = 0;
4659 /* fill in later from mbuf we build */
4660 init->ch.chunk_length = 0;
4661 /* place in my tag */
4662 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4663 /* set up some of the credits. */
4664 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4665 SCTP_MINIMAL_RWND));
4667 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4668 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4669 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4670 /* now the address restriction */
4671 /* XXX Should we take the address family of the socket into account? */
4672 sup_addr = (struct sctp_supported_addr_param *)((caddr_t)init +
4674 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4677 /* we support 2 types: IPv4/IPv6 */
4678 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + 2 * sizeof(uint16_t));
4679 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4680 sup_addr->addr_type[1] = htons(SCTP_IPV6_ADDRESS);
4682 /* we support 1 type: IPv6 */
4683 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4684 sup_addr->addr_type[0] = htons(SCTP_IPV6_ADDRESS);
4685 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4688 /* we support 1 type: IPv4 */
4689 sup_addr->ph.param_length = htons(sizeof(struct sctp_paramhdr) + sizeof(uint16_t));
4690 sup_addr->addr_type[0] = htons(SCTP_IPV4_ADDRESS);
4691 sup_addr->addr_type[1] = htons(0); /* this is the padding */
4693 SCTP_BUF_LEN(m) += sizeof(struct sctp_supported_addr_param);
4694 /* adaptation layer indication parameter */
4695 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)sup_addr + sizeof(struct sctp_supported_addr_param));
4696 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4697 ali->ph.param_length = htons(sizeof(*ali));
4698 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
4699 SCTP_BUF_LEN(m) += sizeof(*ali);
4700 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
4702 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4703 /* Add NAT friendly parameter */
4704 struct sctp_paramhdr *ph;
4706 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4707 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4708 ph->param_length = htons(sizeof(struct sctp_paramhdr));
4709 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
4710 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ph + sizeof(*ph));
4712 /* now any cookie time extensions */
4713 if (stcb->asoc.cookie_preserve_req) {
4714 struct sctp_cookie_perserve_param *cookie_preserve;
4716 cookie_preserve = (struct sctp_cookie_perserve_param *)(ecn);
4717 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4718 cookie_preserve->ph.param_length = htons(
4719 sizeof(*cookie_preserve));
4720 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4721 SCTP_BUF_LEN(m) += sizeof(*cookie_preserve);
4722 ecn = (struct sctp_ecn_supported_param *)(
4723 (caddr_t)cookie_preserve + sizeof(*cookie_preserve));
4724 stcb->asoc.cookie_preserve_req = 0;
4727 if (stcb->asoc.ecn_allowed == 1) {
4728 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
4729 ecn->ph.param_length = htons(sizeof(*ecn));
4730 SCTP_BUF_LEN(m) += sizeof(*ecn);
4731 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
4734 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
4736 /* And now tell the peer we do pr-sctp */
4737 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
4738 prsctp->ph.param_length = htons(sizeof(*prsctp));
4739 SCTP_BUF_LEN(m) += sizeof(*prsctp);
4741 /* And now tell the peer we do all the extensions */
4742 pr_supported = (struct sctp_supported_chunk_types_param *)
4743 ((caddr_t)prsctp + sizeof(*prsctp));
4744 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4746 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4747 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4748 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4749 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4750 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4751 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4752 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4754 if (stcb->asoc.sctp_nr_sack_on_off == 1) {
4755 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4757 p_len = sizeof(*pr_supported) + num_ext;
4758 pr_supported->ph.param_length = htons(p_len);
4759 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
4760 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4763 /* add authentication parameters */
4764 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
4765 struct sctp_auth_random *randp;
4766 struct sctp_auth_hmac_algo *hmacs;
4767 struct sctp_auth_chunk_list *chunks;
4769 /* attach RANDOM parameter, if available */
4770 if (stcb->asoc.authinfo.random != NULL) {
4771 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4772 p_len = sizeof(*randp) + stcb->asoc.authinfo.random_len;
4773 /* random key already contains the header */
4774 bcopy(stcb->asoc.authinfo.random->key, randp, p_len);
4775 /* zero out any padding required */
4776 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
4777 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4779 /* add HMAC_ALGO parameter */
4780 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4781 p_len = sctp_serialize_hmaclist(stcb->asoc.local_hmacs,
4782 (uint8_t *) hmacs->hmac_ids);
4784 p_len += sizeof(*hmacs);
4785 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4786 hmacs->ph.param_length = htons(p_len);
4787 /* zero out any padding required */
4788 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
4789 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4791 /* add CHUNKS parameter */
4792 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
4793 p_len = sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks,
4794 chunks->chunk_types);
4796 p_len += sizeof(*chunks);
4797 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4798 chunks->ph.param_length = htons(p_len);
4799 /* zero out any padding required */
4800 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
4801 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
4804 /* now the addresses */
4806 struct sctp_scoping scp;
4809 * To optimize this we could put the scoping stuff into a
4810 * structure and remove the individual uint8's from the
4811 * assoc structure. Then we could just sifa in the address
4812 * within the stcb. But for now this is a quick hack to get
4813 * the address stuff teased apart.
4816 scp.ipv4_addr_legal = stcb->asoc.ipv4_addr_legal;
4817 scp.ipv6_addr_legal = stcb->asoc.ipv6_addr_legal;
4818 scp.loopback_scope = stcb->asoc.loopback_scope;
4819 scp.ipv4_local_scope = stcb->asoc.ipv4_local_scope;
4820 scp.local_scope = stcb->asoc.local_scope;
4821 scp.site_scope = stcb->asoc.site_scope;
4823 sctp_add_addresses_to_i_ia(inp, stcb, &scp, m, cnt_inits_to);
4826 /* calulate the size and update pkt header and chunk header */
4828 for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
4829 if (SCTP_BUF_NEXT(m_at) == NULL)
4831 p_len += SCTP_BUF_LEN(m_at);
4833 init->ch.chunk_length = htons(p_len);
4835 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
4836 * here since the timer will drive a retranmission.
4839 /* I don't expect this to execute but we will be safe here */
4841 if ((padval) && (mp_last)) {
4843 * The compiler worries that mp_last may not be set even
4844 * though I think it is impossible :-> however we add
4845 * mp_last here just in case.
4847 ret = sctp_add_pad_tombuf(mp_last, (4 - padval));
4849 /* Houston we have a problem, no space */
4854 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4855 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4856 (struct sockaddr *)&net->ro._l_addr,
4857 m, 0, NULL, 0, 0, 0, 0,
4858 inp->sctp_lport, stcb->rport, htonl(0),
4859 net->port, so_locked, NULL, NULL);
4860 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4861 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4862 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4866 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4867 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4870 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4871 * being equal to the beginning of the params i.e. (iphlen +
4872 * sizeof(struct sctp_init_msg) parse through the parameters to the
4873 * end of the mbuf verifying that all parameters are known.
4875 * For unknown parameters build and return a mbuf with
4876 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4877 * processing this chunk stop, and set *abort_processing to 1.
4879 * By having param_offset be pre-set to where parameters begin it is
4880 * hoped that this routine may be reused in the future by new
4883 struct sctp_paramhdr *phdr, params;
4885 struct mbuf *mat, *op_err;
4886 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4887 int at, limit, pad_needed;
4888 uint16_t ptype, plen, padded_size;
4891 *abort_processing = 0;
4894 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4897 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4898 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4899 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4900 ptype = ntohs(phdr->param_type);
4901 plen = ntohs(phdr->param_length);
4902 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4903 /* wacked parameter */
4904 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4907 limit -= SCTP_SIZE32(plen);
4909 * All parameters for all chunks that we know/understand are
4910 * listed here. We process them other places and make
4911 * appropriate stop actions per the upper bits. However this
4912 * is the generic routine processor's can call to get back
4913 * an operr.. to either incorporate (init-ack) or send.
4915 padded_size = SCTP_SIZE32(plen);
4917 /* Param's with variable size */
4918 case SCTP_HEARTBEAT_INFO:
4919 case SCTP_STATE_COOKIE:
4920 case SCTP_UNRECOG_PARAM:
4921 case SCTP_ERROR_CAUSE_IND:
4925 /* Param's with variable size within a range */
4926 case SCTP_CHUNK_LIST:
4927 case SCTP_SUPPORTED_CHUNK_EXT:
4928 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
4929 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
4934 case SCTP_SUPPORTED_ADDRTYPE:
4935 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
4936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
4942 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
4943 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
4948 case SCTP_SET_PRIM_ADDR:
4949 case SCTP_DEL_IP_ADDRESS:
4950 case SCTP_ADD_IP_ADDRESS:
4951 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
4952 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
4953 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
4958 /* Param's with a fixed size */
4959 case SCTP_IPV4_ADDRESS:
4960 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
4961 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
4966 case SCTP_IPV6_ADDRESS:
4967 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
4968 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
4973 case SCTP_COOKIE_PRESERVE:
4974 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
4975 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
4980 case SCTP_HAS_NAT_SUPPORT:
4983 case SCTP_PRSCTP_SUPPORTED:
4985 if (padded_size != sizeof(struct sctp_paramhdr)) {
4986 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
4991 case SCTP_ECN_CAPABLE:
4992 if (padded_size != sizeof(struct sctp_ecn_supported_param)) {
4993 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
4998 case SCTP_ULP_ADAPTATION:
4999 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5000 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5005 case SCTP_SUCCESS_REPORT:
5006 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5007 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5012 case SCTP_HOSTNAME_ADDRESS:
5014 /* We can NOT handle HOST NAME addresses!! */
5017 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5018 *abort_processing = 1;
5019 if (op_err == NULL) {
5020 /* Ok need to try to get a mbuf */
5022 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5024 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5027 l_len += sizeof(struct sctp_paramhdr);
5028 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5030 SCTP_BUF_LEN(op_err) = 0;
5032 * pre-reserve space for ip
5033 * and sctp header and
5037 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5039 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5041 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5042 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5046 /* If we have space */
5047 struct sctp_paramhdr s;
5050 uint32_t cpthis = 0;
5052 pad_needed = 4 - (err_at % 4);
5053 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5054 err_at += pad_needed;
5056 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5057 s.param_length = htons(sizeof(s) + plen);
5058 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5059 err_at += sizeof(s);
5060 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5062 sctp_m_freem(op_err);
5064 * we are out of memory but
5065 * we still need to have a
5066 * look at what to do (the
5067 * system is in trouble
5072 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5079 * we do not recognize the parameter figure out what
5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5083 if ((ptype & 0x4000) == 0x4000) {
5084 /* Report bit is set?? */
5085 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5086 if (op_err == NULL) {
5089 /* Ok need to try to get an mbuf */
5091 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5093 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5096 l_len += sizeof(struct sctp_paramhdr);
5097 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5099 SCTP_BUF_LEN(op_err) = 0;
5101 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5103 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5105 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5106 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5110 /* If we have space */
5111 struct sctp_paramhdr s;
5114 uint32_t cpthis = 0;
5116 pad_needed = 4 - (err_at % 4);
5117 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5118 err_at += pad_needed;
5120 s.param_type = htons(SCTP_UNRECOG_PARAM);
5121 s.param_length = htons(sizeof(s) + plen);
5122 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5123 err_at += sizeof(s);
5124 if (plen > sizeof(tempbuf)) {
5125 plen = sizeof(tempbuf);
5127 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5129 sctp_m_freem(op_err);
5131 * we are out of memory but
5132 * we still need to have a
5133 * look at what to do (the
5134 * system is in trouble
5138 goto more_processing;
5140 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5145 if ((ptype & 0x8000) == 0x0000) {
5146 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5149 /* skip this chunk and continue processing */
5150 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5151 at += SCTP_SIZE32(plen);
5156 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5160 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5161 *abort_processing = 1;
5162 if ((op_err == NULL) && phdr) {
5166 l_len = sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5168 l_len = sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
5170 l_len += (2 * sizeof(struct sctp_paramhdr));
5171 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_DONTWAIT, 1, MT_DATA);
5173 SCTP_BUF_LEN(op_err) = 0;
5175 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5177 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5179 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5180 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5183 if ((op_err) && phdr) {
5184 struct sctp_paramhdr s;
5187 uint32_t cpthis = 0;
5189 pad_needed = 4 - (err_at % 4);
5190 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5191 err_at += pad_needed;
5193 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5194 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5195 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5196 err_at += sizeof(s);
5197 /* Only copy back the p-hdr that caused the issue */
5198 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5204 sctp_are_there_new_addresses(struct sctp_association *asoc,
5205 struct mbuf *in_initpkt, int offset)
5208 * Given a INIT packet, look through the packet to verify that there
5209 * are NO new addresses. As we go through the parameters add reports
5210 * of any un-understood parameters that require an error. Also we
5211 * must return (1) to drop the packet if we see a un-understood
5212 * parameter that tells us to drop the chunk.
5214 struct sockaddr *sa_touse;
5215 struct sockaddr *sa;
5216 struct sctp_paramhdr *phdr, params;
5217 uint16_t ptype, plen;
5219 struct sctp_nets *net;
5223 struct sockaddr_in sin4, *sa4;
5227 struct sockaddr_in6 sin6, *sa6;
5228 struct ip6_hdr *ip6h;
5233 memset(&sin4, 0, sizeof(sin4));
5234 sin4.sin_family = AF_INET;
5235 sin4.sin_len = sizeof(sin4);
5238 memset(&sin6, 0, sizeof(sin6));
5239 sin6.sin6_family = AF_INET6;
5240 sin6.sin6_len = sizeof(sin6);
5243 /* First what about the src address of the pkt ? */
5244 iph = mtod(in_initpkt, struct ip *);
5245 switch (iph->ip_v) {
5248 /* source addr is IPv4 */
5249 sin4.sin_addr = iph->ip_src;
5250 sa_touse = (struct sockaddr *)&sin4;
5254 case IPV6_VERSION >> 4:
5255 /* source addr is IPv6 */
5256 ip6h = mtod(in_initpkt, struct ip6_hdr *);
5257 sin6.sin6_addr = ip6h->ip6_src;
5258 sa_touse = (struct sockaddr *)&sin6;
5266 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5267 sa = (struct sockaddr *)&net->ro._l_addr;
5268 if (sa->sa_family == sa_touse->sa_family) {
5270 if (sa->sa_family == AF_INET) {
5271 sa4 = (struct sockaddr_in *)sa;
5272 if (sa4->sin_addr.s_addr == sin4.sin_addr.s_addr) {
5279 if (sa->sa_family == AF_INET6) {
5280 sa6 = (struct sockaddr_in6 *)sa;
5281 if (SCTP6_ARE_ADDR_EQUAL(sa6, &sin6)) {
5290 /* New address added! no need to look futher. */
5293 /* Ok so far lets munge through the rest of the packet */
5294 offset += sizeof(struct sctp_init_chunk);
5295 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5298 ptype = ntohs(phdr->param_type);
5299 plen = ntohs(phdr->param_length);
5302 case SCTP_IPV4_ADDRESS:
5304 struct sctp_ipv4addr_param *p4, p4_buf;
5306 phdr = sctp_get_next_param(in_initpkt, offset,
5307 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5308 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5312 p4 = (struct sctp_ipv4addr_param *)phdr;
5313 sin4.sin_addr.s_addr = p4->addr;
5314 sa_touse = (struct sockaddr *)&sin4;
5319 case SCTP_IPV6_ADDRESS:
5321 struct sctp_ipv6addr_param *p6, p6_buf;
5323 phdr = sctp_get_next_param(in_initpkt, offset,
5324 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5325 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5329 p6 = (struct sctp_ipv6addr_param *)phdr;
5330 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5332 sa_touse = (struct sockaddr *)&sin6;
5341 /* ok, sa_touse points to one to check */
5343 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5344 sa = (struct sockaddr *)&net->ro._l_addr;
5345 if (sa->sa_family != sa_touse->sa_family) {
5349 if (sa->sa_family == AF_INET) {
5350 sa4 = (struct sockaddr_in *)sa;
5351 if (sa4->sin_addr.s_addr ==
5352 sin4.sin_addr.s_addr) {
5359 if (sa->sa_family == AF_INET6) {
5360 sa6 = (struct sockaddr_in6 *)sa;
5361 if (SCTP6_ARE_ADDR_EQUAL(
5370 /* New addr added! no need to look further */
5374 offset += SCTP_SIZE32(plen);
5375 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5381 * Given a MBUF chain that was sent into us containing an INIT. Build a
5382 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5383 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5384 * message (i.e. the struct sctp_init_msg).
5387 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5388 struct mbuf *init_pkt, int iphlen, int offset, struct sctphdr *sh,
5389 struct sctp_init_chunk *init_chk, uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5391 struct sctp_association *asoc;
5392 struct mbuf *m, *m_at, *m_tmp, *m_cookie, *op_err, *mp_last;
5393 struct sctp_init_ack_chunk *initack;
5394 struct sctp_adaptation_layer_indication *ali;
5395 struct sctp_ecn_supported_param *ecn;
5396 struct sctp_prsctp_supported_param *prsctp;
5397 struct sctp_supported_chunk_types_param *pr_supported;
5398 union sctp_sockstore store, store1, *over_addr;
5401 struct sockaddr_in *sin, *to_sin;
5405 struct sockaddr_in6 *sin6, *to_sin6;
5411 struct ip6_hdr *ip6;
5414 struct sockaddr *to;
5415 struct sctp_state_cookie stc;
5416 struct sctp_nets *net = NULL;
5417 uint8_t *signature = NULL;
5418 int cnt_inits_to = 0;
5419 uint16_t his_limit, i_want;
5420 int abort_flag, padval;
5423 int nat_friendly = 0;
5431 if ((asoc != NULL) &&
5432 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5433 (sctp_are_there_new_addresses(asoc, init_pkt, offset))) {
5434 /* new addresses, out of here in non-cookie-wait states */
5436 * Send a ABORT, we don't add the new address error clause
5437 * though we even set the T bit and copy in the 0 tag.. this
5438 * looks no different than if no listener was present.
5440 sctp_send_abort(init_pkt, iphlen, sh, 0, NULL, vrf_id, port);
5444 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5445 (offset + sizeof(struct sctp_init_chunk)),
5446 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5449 sctp_send_abort(init_pkt, iphlen, sh,
5450 init_chk->init.initiate_tag, op_err, vrf_id, port);
5453 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
5455 /* No memory, INIT timer will re-attempt. */
5457 sctp_m_freem(op_err);
5460 SCTP_BUF_LEN(m) = sizeof(struct sctp_init_chunk);
5462 /* the time I built cookie */
5463 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5465 /* populate any tie tags */
5467 /* unlock before tag selections */
5468 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5469 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5470 stc.cookie_life = asoc->cookie_life;
5471 net = asoc->primary_destination;
5473 stc.tie_tag_my_vtag = 0;
5474 stc.tie_tag_peer_vtag = 0;
5475 /* life I will award this cookie */
5476 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5479 /* copy in the ports for later check */
5480 stc.myport = sh->dest_port;
5481 stc.peerport = sh->src_port;
5484 * If we wanted to honor cookie life extentions, we would add to
5485 * stc.cookie_life. For now we should NOT honor any extension
5487 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5488 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5489 struct inpcb *in_inp;
5491 /* Its a V6 socket */
5492 in_inp = (struct inpcb *)inp;
5493 stc.ipv6_addr_legal = 1;
5494 /* Now look at the binding flag to see if V4 will be legal */
5495 if (SCTP_IPV6_V6ONLY(in_inp) == 0) {
5496 stc.ipv4_addr_legal = 1;
5498 /* V4 addresses are NOT legal on the association */
5499 stc.ipv4_addr_legal = 0;
5502 /* Its a V4 socket, no - V6 */
5503 stc.ipv4_addr_legal = 1;
5504 stc.ipv6_addr_legal = 0;
5507 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
5512 /* now for scope setup */
5513 memset((caddr_t)&store, 0, sizeof(store));
5514 memset((caddr_t)&store1, 0, sizeof(store1));
5517 to_sin = &store1.sin;
5521 to_sin6 = &store1.sin6;
5523 iph = mtod(init_pkt, struct ip *);
5524 /* establish the to_addr's */
5525 switch (iph->ip_v) {
5528 to_sin->sin_port = sh->dest_port;
5529 to_sin->sin_family = AF_INET;
5530 to_sin->sin_len = sizeof(struct sockaddr_in);
5531 to_sin->sin_addr = iph->ip_dst;
5535 case IPV6_VERSION >> 4:
5536 ip6 = mtod(init_pkt, struct ip6_hdr *);
5537 to_sin6->sin6_addr = ip6->ip6_dst;
5538 to_sin6->sin6_scope_id = 0;
5539 to_sin6->sin6_port = sh->dest_port;
5540 to_sin6->sin6_family = AF_INET6;
5541 to_sin6->sin6_len = sizeof(struct sockaddr_in6);
5550 to = (struct sockaddr *)&store;
5551 switch (iph->ip_v) {
5555 sin->sin_family = AF_INET;
5556 sin->sin_len = sizeof(struct sockaddr_in);
5557 sin->sin_port = sh->src_port;
5558 sin->sin_addr = iph->ip_src;
5559 /* lookup address */
5560 stc.address[0] = sin->sin_addr.s_addr;
5564 stc.addr_type = SCTP_IPV4_ADDRESS;
5565 /* local from address */
5566 stc.laddress[0] = to_sin->sin_addr.s_addr;
5567 stc.laddress[1] = 0;
5568 stc.laddress[2] = 0;
5569 stc.laddress[3] = 0;
5570 stc.laddr_type = SCTP_IPV4_ADDRESS;
5571 /* scope_id is only for v6 */
5573 #ifndef SCTP_DONT_DO_PRIVADDR_SCOPE
5574 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
5579 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
5580 /* Must use the address in this case */
5581 if (sctp_is_address_on_local_host((struct sockaddr *)sin, vrf_id)) {
5582 stc.loopback_scope = 1;
5585 stc.local_scope = 0;
5591 case IPV6_VERSION >> 4:
5593 ip6 = mtod(init_pkt, struct ip6_hdr *);
5594 sin6->sin6_family = AF_INET6;
5595 sin6->sin6_len = sizeof(struct sockaddr_in6);
5596 sin6->sin6_port = sh->src_port;
5597 sin6->sin6_addr = ip6->ip6_src;
5598 /* lookup address */
5599 memcpy(&stc.address, &sin6->sin6_addr,
5600 sizeof(struct in6_addr));
5601 sin6->sin6_scope_id = 0;
5602 stc.addr_type = SCTP_IPV6_ADDRESS;
5604 if (sctp_is_address_on_local_host((struct sockaddr *)sin6, vrf_id)) {
5606 * FIX ME: does this have scope from
5609 (void)sa6_recoverscope(sin6);
5610 stc.scope_id = sin6->sin6_scope_id;
5611 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5612 stc.loopback_scope = 1;
5613 stc.local_scope = 0;
5616 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5618 * If the new destination is a
5619 * LINK_LOCAL we must have common
5620 * both site and local scope. Don't
5621 * set local scope though since we
5622 * must depend on the source to be
5623 * added implicitly. We cannot
5624 * assure just because we share one
5625 * link that all links are common.
5627 stc.local_scope = 0;
5631 * we start counting for the private
5632 * address stuff at 1. since the
5633 * link local we source from won't
5634 * show up in our scoped count.
5638 * pull out the scope_id from
5642 * FIX ME: does this have scope from
5645 (void)sa6_recoverscope(sin6);
5646 stc.scope_id = sin6->sin6_scope_id;
5647 sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
5648 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
5650 * If the new destination is
5651 * SITE_LOCAL then we must have site
5656 memcpy(&stc.laddress, &to_sin6->sin6_addr, sizeof(struct in6_addr));
5657 stc.laddr_type = SCTP_IPV6_ADDRESS;
5667 /* set the scope per the existing tcb */
5670 struct sctp_nets *lnet;
5674 stc.loopback_scope = asoc->loopback_scope;
5675 stc.ipv4_scope = asoc->ipv4_local_scope;
5676 stc.site_scope = asoc->site_scope;
5677 stc.local_scope = asoc->local_scope;
5679 /* Why do we not consider IPv4 LL addresses? */
5680 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5681 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5682 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5684 * if we have a LL address, start
5692 /* use the net pointer */
5693 to = (struct sockaddr *)&net->ro._l_addr;
5694 switch (to->sa_family) {
5697 sin = (struct sockaddr_in *)to;
5698 stc.address[0] = sin->sin_addr.s_addr;
5702 stc.addr_type = SCTP_IPV4_ADDRESS;
5703 if (net->src_addr_selected == 0) {
5705 * strange case here, the INIT should have
5706 * did the selection.
5708 net->ro._s_addr = sctp_source_address_selection(inp,
5709 stcb, (sctp_route_t *) & net->ro,
5711 if (net->ro._s_addr == NULL)
5714 net->src_addr_selected = 1;
5717 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5718 stc.laddress[1] = 0;
5719 stc.laddress[2] = 0;
5720 stc.laddress[3] = 0;
5721 stc.laddr_type = SCTP_IPV4_ADDRESS;
5722 /* scope_id is only for v6 */
5728 sin6 = (struct sockaddr_in6 *)to;
5729 memcpy(&stc.address, &sin6->sin6_addr,
5730 sizeof(struct in6_addr));
5731 stc.addr_type = SCTP_IPV6_ADDRESS;
5732 stc.scope_id = sin6->sin6_scope_id;
5733 if (net->src_addr_selected == 0) {
5735 * strange case here, the INIT should have
5736 * did the selection.
5738 net->ro._s_addr = sctp_source_address_selection(inp,
5739 stcb, (sctp_route_t *) & net->ro,
5741 if (net->ro._s_addr == NULL)
5744 net->src_addr_selected = 1;
5746 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5747 sizeof(struct in6_addr));
5748 stc.laddr_type = SCTP_IPV6_ADDRESS;
5753 /* Now lets put the SCTP header in place */
5754 initack = mtod(m, struct sctp_init_ack_chunk *);
5755 /* Save it off for quick ref */
5756 stc.peers_vtag = init_chk->init.initiate_tag;
5758 memcpy(stc.identification, SCTP_VERSION_STRING,
5759 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5760 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5761 /* now the chunk header */
5762 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5763 initack->ch.chunk_flags = 0;
5764 /* fill in later from mbuf we build */
5765 initack->ch.chunk_length = 0;
5766 /* place in my tag */
5767 if ((asoc != NULL) &&
5768 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5769 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5770 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5771 /* re-use the v-tags and init-seq here */
5772 initack->init.initiate_tag = htonl(asoc->my_vtag);
5773 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5775 uint32_t vtag, itsn;
5777 if (hold_inp_lock) {
5778 SCTP_INP_INCR_REF(inp);
5779 SCTP_INP_RUNLOCK(inp);
5782 atomic_add_int(&asoc->refcnt, 1);
5783 SCTP_TCB_UNLOCK(stcb);
5785 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5786 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5788 * Got a duplicate vtag on some guy behind a
5789 * nat make sure we don't use it.
5793 initack->init.initiate_tag = htonl(vtag);
5794 /* get a TSN to use too */
5795 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5796 initack->init.initial_tsn = htonl(itsn);
5797 SCTP_TCB_LOCK(stcb);
5798 atomic_add_int(&asoc->refcnt, -1);
5800 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5801 initack->init.initiate_tag = htonl(vtag);
5802 /* get a TSN to use too */
5803 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5805 if (hold_inp_lock) {
5806 SCTP_INP_RLOCK(inp);
5807 SCTP_INP_DECR_REF(inp);
5810 /* save away my tag to */
5811 stc.my_vtag = initack->init.initiate_tag;
5813 /* set up some of the credits. */
5814 so = inp->sctp_socket;
5816 /* memory problem */
5820 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5822 /* set what I want */
5823 his_limit = ntohs(init_chk->init.num_inbound_streams);
5824 /* choose what I want */
5826 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5827 i_want = asoc->streamoutcnt;
5829 i_want = inp->sctp_ep.pre_open_stream_count;
5832 i_want = inp->sctp_ep.pre_open_stream_count;
5834 if (his_limit < i_want) {
5835 /* I Want more :< */
5836 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5838 /* I can have what I want :> */
5839 initack->init.num_outbound_streams = htons(i_want);
5841 /* tell him his limt. */
5842 initack->init.num_inbound_streams =
5843 htons(inp->sctp_ep.max_open_streams_intome);
5845 /* adaptation layer indication parameter */
5846 ali = (struct sctp_adaptation_layer_indication *)((caddr_t)initack + sizeof(*initack));
5847 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5848 ali->ph.param_length = htons(sizeof(*ali));
5849 ali->indication = ntohl(inp->sctp_ep.adaptation_layer_indicator);
5850 SCTP_BUF_LEN(m) += sizeof(*ali);
5851 ecn = (struct sctp_ecn_supported_param *)((caddr_t)ali + sizeof(*ali));
5854 if (((asoc != NULL) && (asoc->ecn_allowed == 1)) ||
5855 (inp->sctp_ecn_enable == 1)) {
5856 ecn->ph.param_type = htons(SCTP_ECN_CAPABLE);
5857 ecn->ph.param_length = htons(sizeof(*ecn));
5858 SCTP_BUF_LEN(m) += sizeof(*ecn);
5860 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn +
5863 prsctp = (struct sctp_prsctp_supported_param *)((caddr_t)ecn);
5865 /* And now tell the peer we do pr-sctp */
5866 prsctp->ph.param_type = htons(SCTP_PRSCTP_SUPPORTED);
5867 prsctp->ph.param_length = htons(sizeof(*prsctp));
5868 SCTP_BUF_LEN(m) += sizeof(*prsctp);
5870 /* Add NAT friendly parameter */
5871 struct sctp_paramhdr *ph;
5873 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5874 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5875 ph->param_length = htons(sizeof(struct sctp_paramhdr));
5876 SCTP_BUF_LEN(m) += sizeof(struct sctp_paramhdr);
5878 /* And now tell the peer we do all the extensions */
5879 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5880 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5882 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5883 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5884 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5885 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5886 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5887 if (!SCTP_BASE_SYSCTL(sctp_auth_disable))
5888 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5889 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off))
5890 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5891 p_len = sizeof(*pr_supported) + num_ext;
5892 pr_supported->ph.param_length = htons(p_len);
5893 bzero((caddr_t)pr_supported + p_len, SCTP_SIZE32(p_len) - p_len);
5894 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5896 /* add authentication parameters */
5897 if (!SCTP_BASE_SYSCTL(sctp_auth_disable)) {
5898 struct sctp_auth_random *randp;
5899 struct sctp_auth_hmac_algo *hmacs;
5900 struct sctp_auth_chunk_list *chunks;
5901 uint16_t random_len;
5903 /* generate and add RANDOM parameter */
5904 random_len = SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5905 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5906 randp->ph.param_type = htons(SCTP_RANDOM);
5907 p_len = sizeof(*randp) + random_len;
5908 randp->ph.param_length = htons(p_len);
5909 SCTP_READ_RANDOM(randp->random_data, random_len);
5910 /* zero out any padding required */
5911 bzero((caddr_t)randp + p_len, SCTP_SIZE32(p_len) - p_len);
5912 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5914 /* add HMAC_ALGO parameter */
5915 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5916 p_len = sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5917 (uint8_t *) hmacs->hmac_ids);
5919 p_len += sizeof(*hmacs);
5920 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5921 hmacs->ph.param_length = htons(p_len);
5922 /* zero out any padding required */
5923 bzero((caddr_t)hmacs + p_len, SCTP_SIZE32(p_len) - p_len);
5924 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5926 /* add CHUNKS parameter */
5927 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+SCTP_BUF_LEN(m));
5928 p_len = sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5929 chunks->chunk_types);
5931 p_len += sizeof(*chunks);
5932 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5933 chunks->ph.param_length = htons(p_len);
5934 /* zero out any padding required */
5935 bzero((caddr_t)chunks + p_len, SCTP_SIZE32(p_len) - p_len);
5936 SCTP_BUF_LEN(m) += SCTP_SIZE32(p_len);
5940 /* now the addresses */
5942 struct sctp_scoping scp;
5945 * To optimize this we could put the scoping stuff into a
5946 * structure and remove the individual uint8's from the stc
5947 * structure. Then we could just sifa in the address within
5948 * the stc.. but for now this is a quick hack to get the
5949 * address stuff teased apart.
5951 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5952 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5953 scp.loopback_scope = stc.loopback_scope;
5954 scp.ipv4_local_scope = stc.ipv4_scope;
5955 scp.local_scope = stc.local_scope;
5956 scp.site_scope = stc.site_scope;
5957 m_at = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_at, cnt_inits_to);
5960 /* tack on the operational error if present */
5969 llen += SCTP_BUF_LEN(ol);
5970 ol = SCTP_BUF_NEXT(ol);
5973 /* must add a pad to the param */
5974 uint32_t cpthis = 0;
5977 padlen = 4 - (llen % 4);
5978 m_copyback(op_err, llen, padlen, (caddr_t)&cpthis);
5980 while (SCTP_BUF_NEXT(m_at) != NULL) {
5981 m_at = SCTP_BUF_NEXT(m_at);
5983 SCTP_BUF_NEXT(m_at) = op_err;
5984 while (SCTP_BUF_NEXT(m_at) != NULL) {
5985 m_at = SCTP_BUF_NEXT(m_at);
5988 /* pre-calulate the size and update pkt header and chunk header */
5990 for (m_tmp = m; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
5991 p_len += SCTP_BUF_LEN(m_tmp);
5992 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
5993 /* m_tmp should now point to last one */
5998 /* Now we must build a cookie */
5999 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6000 if (m_cookie == NULL) {
6001 /* memory problem */
6005 /* Now append the cookie to the end and update the space/size */
6006 SCTP_BUF_NEXT(m_tmp) = m_cookie;
6008 for (m_tmp = m_cookie; m_tmp; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6009 p_len += SCTP_BUF_LEN(m_tmp);
6010 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6011 /* m_tmp should now point to last one */
6017 * Place in the size, but we don't include the last pad (if any) in
6020 initack->ch.chunk_length = htons(p_len);
6023 * Time to sign the cookie, we don't sign over the cookie signature
6024 * though thus we set trailer.
6026 (void)sctp_hmac_m(SCTP_HMAC,
6027 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6028 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6029 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6031 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6032 * here since the timer will drive a retranmission.
6035 if ((padval) && (mp_last)) {
6036 /* see my previous comments on mp_last */
6037 if (sctp_add_pad_tombuf(mp_last, (4 - padval))) {
6038 /* Houston we have a problem, no space */
6043 if (stc.loopback_scope) {
6044 over_addr = &store1;
6049 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6051 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6052 port, SCTP_SO_NOT_LOCKED, over_addr, init_pkt);
6053 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6058 sctp_prune_prsctp(struct sctp_tcb *stcb,
6059 struct sctp_association *asoc,
6060 struct sctp_sndrcvinfo *srcv,
6064 struct sctp_tmit_chunk *chk, *nchk;
6066 SCTP_TCB_LOCK_ASSERT(stcb);
6067 if ((asoc->peer_supports_prsctp) &&
6068 (asoc->sent_queue_cnt_removeable > 0)) {
6069 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6071 * Look for chunks marked with the PR_SCTP flag AND
6072 * the buffer space flag. If the one being sent is
6073 * equal or greater priority then purge the old one
6074 * and free some space.
6076 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6078 * This one is PR-SCTP AND buffer space
6081 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6083 * Lower numbers equates to higher
6084 * priority so if the one we are
6085 * looking at has a larger or equal
6086 * priority we want to drop the data
6087 * and NOT retransmit it.
6091 * We release the book_size
6092 * if the mbuf is here
6097 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6098 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_SENT;
6100 cause = SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT;
6101 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6104 freed_spc += ret_spc;
6105 if (freed_spc >= dataout) {
6108 } /* if chunk was present */
6109 } /* if of sufficent priority */
6110 } /* if chunk has enabled */
6111 } /* tailqforeach */
6113 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6114 /* Here we must move to the sent queue and mark */
6115 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6116 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6119 * We release the book_size
6120 * if the mbuf is here
6124 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6125 SCTP_RESPONSE_TO_USER_REQ | SCTP_NOTIFY_DATAGRAM_UNSENT,
6128 freed_spc += ret_spc;
6129 if (freed_spc >= dataout) {
6132 } /* end if chk->data */
6133 } /* end if right class */
6134 } /* end if chk pr-sctp */
6135 } /* tailqforeachsafe (chk) */
6136 } /* if enabled in asoc */
6140 sctp_get_frag_point(struct sctp_tcb *stcb,
6141 struct sctp_association *asoc)
6146 * For endpoints that have both v6 and v4 addresses we must reserve
6147 * room for the ipv6 header, for those that are only dealing with V4
6148 * we use a larger frag point.
6150 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6151 ovh = SCTP_MED_OVERHEAD;
6153 ovh = SCTP_MED_V4_OVERHEAD;
6156 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6157 siz = asoc->smallest_mtu - ovh;
6159 siz = (stcb->asoc.sctp_frag_point - ovh);
6161 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6163 /* A data chunk MUST fit in a cluster */
6164 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6167 /* adjust for an AUTH chunk if DATA requires auth */
6168 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6169 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6172 /* make it an even word boundary please */
6179 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6183 * We assume that the user wants PR_SCTP_TTL if the user provides a
6184 * positive lifetime but does not specify any PR_SCTP policy. This
6185 * is a BAD assumption and causes problems at least with the
6186 * U-Vancovers MPI folks. I will change this to be no policy means
6189 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6190 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6195 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6196 case CHUNK_FLAGS_PR_SCTP_BUF:
6198 * Time to live is a priority stored in tv_sec when doing
6199 * the buffer drop thing.
6201 sp->ts.tv_sec = sp->timetolive;
6204 case CHUNK_FLAGS_PR_SCTP_TTL:
6208 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6209 tv.tv_sec = sp->timetolive / 1000;
6210 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6212 * TODO sctp_constants.h needs alternative time
6213 * macros when _KERNEL is undefined.
6215 timevaladd(&sp->ts, &tv);
6218 case CHUNK_FLAGS_PR_SCTP_RTX:
6220 * Time to live is a the number or retransmissions stored in
6223 sp->ts.tv_sec = sp->timetolive;
6227 SCTPDBG(SCTP_DEBUG_USRREQ1,
6228 "Unknown PR_SCTP policy %u.\n",
6229 PR_SCTP_POLICY(sp->sinfo_flags));
6235 sctp_msg_append(struct sctp_tcb *stcb,
6236 struct sctp_nets *net,
6238 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6242 struct sctp_stream_queue_pending *sp = NULL;
6243 struct sctp_stream_out *strm;
6246 * Given an mbuf chain, put it into the association send queue and
6247 * place it on the wheel
6249 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6250 /* Invalid stream number */
6251 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6255 if ((stcb->asoc.stream_locked) &&
6256 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6257 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6261 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6262 /* Now can we send this? */
6263 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6264 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6265 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6266 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6267 /* got data while shutting down */
6268 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6272 sctp_alloc_a_strmoq(stcb, sp);
6274 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6278 sp->sinfo_flags = srcv->sinfo_flags;
6279 sp->timetolive = srcv->sinfo_timetolive;
6280 sp->ppid = srcv->sinfo_ppid;
6281 sp->context = srcv->sinfo_context;
6283 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6285 atomic_add_int(&sp->net->ref_count, 1);
6289 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6290 sp->stream = srcv->sinfo_stream;
6291 sp->msg_is_complete = 1;
6292 sp->sender_all_done = 1;
6295 sp->tail_mbuf = NULL;
6296 sctp_set_prsctp_policy(sp);
6298 * We could in theory (for sendall) sifa the length in, but we would
6299 * still have to hunt through the chain since we need to setup the
6303 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6304 if (SCTP_BUF_NEXT(at) == NULL)
6306 sp->length += SCTP_BUF_LEN(at);
6308 if (srcv->sinfo_keynumber_valid) {
6309 sp->auth_keyid = srcv->sinfo_keynumber;
6311 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6313 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6314 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6315 sp->holds_key_ref = 1;
6317 if (hold_stcb_lock == 0) {
6318 SCTP_TCB_SEND_LOCK(stcb);
6320 sctp_snd_sb_alloc(stcb, sp->length);
6321 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6322 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6323 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
6324 sp->strseq = strm->next_sequence_sent;
6325 strm->next_sequence_sent++;
6327 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6329 if (hold_stcb_lock == 0) {
6330 SCTP_TCB_SEND_UNLOCK(stcb);
6340 static struct mbuf *
6341 sctp_copy_mbufchain(struct mbuf *clonechain,
6342 struct mbuf *outchain,
6343 struct mbuf **endofchain,
6346 uint8_t copy_by_ref)
6349 struct mbuf *appendchain;
6353 if (endofchain == NULL) {
6357 sctp_m_freem(outchain);
6360 if (can_take_mbuf) {
6361 appendchain = clonechain;
6364 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6366 /* Its not in a cluster */
6367 if (*endofchain == NULL) {
6368 /* lets get a mbuf cluster */
6369 if (outchain == NULL) {
6370 /* This is the general case */
6372 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6373 if (outchain == NULL) {
6376 SCTP_BUF_LEN(outchain) = 0;
6377 *endofchain = outchain;
6378 /* get the prepend space */
6379 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6382 * We really should not get a NULL
6388 if (SCTP_BUF_NEXT(m) == NULL) {
6392 m = SCTP_BUF_NEXT(m);
6395 if (*endofchain == NULL) {
6397 * huh, TSNH XXX maybe we
6400 sctp_m_freem(outchain);
6404 /* get the new end of length */
6405 len = M_TRAILINGSPACE(*endofchain);
6407 /* how much is left at the end? */
6408 len = M_TRAILINGSPACE(*endofchain);
6410 /* Find the end of the data, for appending */
6411 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6413 /* Now lets copy it out */
6414 if (len >= sizeofcpy) {
6415 /* It all fits, copy it in */
6416 m_copydata(clonechain, 0, sizeofcpy, cp);
6417 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6419 /* fill up the end of the chain */
6421 m_copydata(clonechain, 0, len, cp);
6422 SCTP_BUF_LEN((*endofchain)) += len;
6423 /* now we need another one */
6426 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_HEADER);
6431 SCTP_BUF_NEXT((*endofchain)) = m;
6433 cp = mtod((*endofchain), caddr_t);
6434 m_copydata(clonechain, len, sizeofcpy, cp);
6435 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6439 /* copy the old fashion way */
6440 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_DONTWAIT);
6441 #ifdef SCTP_MBUF_LOGGING
6442 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6445 for (mat = appendchain; mat; mat = SCTP_BUF_NEXT(mat)) {
6446 if (SCTP_BUF_IS_EXTENDED(mat)) {
6447 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6454 if (appendchain == NULL) {
6457 sctp_m_freem(outchain);
6461 /* tack on to the end */
6462 if (*endofchain != NULL) {
6463 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6467 if (SCTP_BUF_NEXT(m) == NULL) {
6468 SCTP_BUF_NEXT(m) = appendchain;
6471 m = SCTP_BUF_NEXT(m);
6475 * save off the end and update the end-chain postion
6479 if (SCTP_BUF_NEXT(m) == NULL) {
6483 m = SCTP_BUF_NEXT(m);
6487 /* save off the end and update the end-chain postion */
6490 if (SCTP_BUF_NEXT(m) == NULL) {
6494 m = SCTP_BUF_NEXT(m);
6496 return (appendchain);
6501 sctp_med_chunk_output(struct sctp_inpcb *inp,
6502 struct sctp_tcb *stcb,
6503 struct sctp_association *asoc,
6506 int control_only, int from_where,
6507 struct timeval *now, int *now_filled, int frag_point, int so_locked
6508 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6514 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6515 uint32_t val SCTP_UNUSED)
6517 struct sctp_copy_all *ca;
6520 int added_control = 0;
6521 int un_sent, do_chunk_output = 1;
6522 struct sctp_association *asoc;
6523 struct sctp_nets *net;
6525 ca = (struct sctp_copy_all *)ptr;
6526 if (ca->m == NULL) {
6529 if (ca->inp != inp) {
6533 if ((ca->m) && ca->sndlen) {
6534 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_DONTWAIT);
6536 /* can't copy so we are done */
6540 #ifdef SCTP_MBUF_LOGGING
6541 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6544 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6545 if (SCTP_BUF_IS_EXTENDED(mat)) {
6546 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
6554 SCTP_TCB_LOCK_ASSERT(stcb);
6555 if (stcb->asoc.alternate) {
6556 net = stcb->asoc.alternate;
6558 net = stcb->asoc.primary_destination;
6560 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6561 /* Abort this assoc with m as the user defined reason */
6563 struct sctp_paramhdr *ph;
6565 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_DONTWAIT);
6567 ph = mtod(m, struct sctp_paramhdr *);
6568 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6569 ph->param_length = htons(ca->sndlen);
6572 * We add one here to keep the assoc from
6573 * dis-appearing on us.
6575 atomic_add_int(&stcb->asoc.refcnt, 1);
6576 sctp_abort_an_association(inp, stcb,
6577 SCTP_RESPONSE_TO_USER_REQ,
6578 m, SCTP_SO_NOT_LOCKED);
6580 * sctp_abort_an_association calls sctp_free_asoc()
6581 * free association will NOT free it since we
6582 * incremented the refcnt .. we do this to prevent
6583 * it being freed and things getting tricky since we
6584 * could end up (from free_asoc) calling inpcb_free
6585 * which would get a recursive lock call to the
6586 * iterator lock.. But as a consequence of that the
6587 * stcb will return to us un-locked.. since
6588 * free_asoc returns with either no TCB or the TCB
6589 * unlocked, we must relock.. to unlock in the
6590 * iterator timer :-0
6592 SCTP_TCB_LOCK(stcb);
6593 atomic_add_int(&stcb->asoc.refcnt, -1);
6594 goto no_chunk_output;
6598 ret = sctp_msg_append(stcb, net, m,
6602 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6603 /* shutdown this assoc */
6606 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6608 if (TAILQ_EMPTY(&asoc->send_queue) &&
6609 TAILQ_EMPTY(&asoc->sent_queue) &&
6611 if (asoc->locked_on_sending) {
6615 * there is nothing queued to send, so I'm
6618 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6619 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6620 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6622 * only send SHUTDOWN the first time
6625 sctp_send_shutdown(stcb, net);
6626 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6627 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6629 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6630 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6631 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6633 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6634 asoc->primary_destination);
6636 do_chunk_output = 0;
6640 * we still got (or just got) data to send,
6641 * so set SHUTDOWN_PENDING
6644 * XXX sockets draft says that SCTP_EOF
6645 * should be sent with no data. currently,
6646 * we will allow user data to be sent first
6647 * and move to SHUTDOWN-PENDING
6649 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6650 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6651 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6652 if (asoc->locked_on_sending) {
6654 * Locked to send out the
6657 struct sctp_stream_queue_pending *sp;
6659 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6661 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6662 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6665 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6666 if (TAILQ_EMPTY(&asoc->send_queue) &&
6667 TAILQ_EMPTY(&asoc->sent_queue) &&
6668 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6670 atomic_add_int(&stcb->asoc.refcnt, 1);
6671 sctp_abort_an_association(stcb->sctp_ep, stcb,
6672 SCTP_RESPONSE_TO_USER_REQ,
6673 NULL, SCTP_SO_NOT_LOCKED);
6674 atomic_add_int(&stcb->asoc.refcnt, -1);
6675 goto no_chunk_output;
6677 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6678 asoc->primary_destination);
6684 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6685 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6687 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6688 (stcb->asoc.total_flight > 0) &&
6689 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))
6691 do_chunk_output = 0;
6693 if (do_chunk_output)
6694 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6695 else if (added_control) {
6696 int num_out = 0, reason = 0, now_filled = 0;
6700 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6701 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6702 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6713 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6715 struct sctp_copy_all *ca;
6717 ca = (struct sctp_copy_all *)ptr;
6719 * Do a notify here? Kacheong suggests that the notify be done at
6720 * the send time.. so you would push up a notification if any send
6721 * failed. Don't know if this is feasable since the only failures we
6722 * have is "memory" related and if you cannot get an mbuf to send
6723 * the data you surely can't get an mbuf to send up to notify the
6724 * user you can't send the data :->
6727 /* now free everything */
6728 sctp_m_freem(ca->m);
6729 SCTP_FREE(ca, SCTP_M_COPYAL);
6733 #define MC_ALIGN(m, len) do { \
6734 SCTP_BUF_RESV_UF(m, ((MCLBYTES - (len)) & ~(sizeof(long) - 1)); \
6739 static struct mbuf *
6740 sctp_copy_out_all(struct uio *uio, int len)
6742 struct mbuf *ret, *at;
6743 int left, willcpy, cancpy, error;
6745 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAIT, 1, MT_DATA);
6751 SCTP_BUF_LEN(ret) = 0;
6752 /* save space for the data chunk header */
6753 cancpy = M_TRAILINGSPACE(ret);
6754 willcpy = min(cancpy, left);
6757 /* Align data to the end */
6758 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6764 SCTP_BUF_LEN(at) = willcpy;
6765 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6768 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAIT, 1, MT_DATA);
6769 if (SCTP_BUF_NEXT(at) == NULL) {
6772 at = SCTP_BUF_NEXT(at);
6773 SCTP_BUF_LEN(at) = 0;
6774 cancpy = M_TRAILINGSPACE(at);
6775 willcpy = min(cancpy, left);
6782 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6783 struct sctp_sndrcvinfo *srcv)
6786 struct sctp_copy_all *ca;
6788 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6792 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6795 memset(ca, 0, sizeof(struct sctp_copy_all));
6799 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6802 * take off the sendall flag, it would be bad if we failed to do
6805 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6806 /* get length and mbuf chain */
6808 ca->sndlen = uio->uio_resid;
6809 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6810 if (ca->m == NULL) {
6811 SCTP_FREE(ca, SCTP_M_COPYAL);
6812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6816 /* Gather the length of the send */
6822 ca->sndlen += SCTP_BUF_LEN(m);
6823 m = SCTP_BUF_NEXT(m);
6827 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6828 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6829 SCTP_ASOC_ANY_STATE,
6831 sctp_sendall_completes, inp, 1);
6833 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6834 SCTP_FREE(ca, SCTP_M_COPYAL);
6835 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6843 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6845 struct sctp_tmit_chunk *chk, *nchk;
6847 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6848 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6849 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6851 sctp_m_freem(chk->data);
6854 asoc->ctrl_queue_cnt--;
6855 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6861 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6863 struct sctp_association *asoc;
6864 struct sctp_tmit_chunk *chk, *nchk;
6865 struct sctp_asconf_chunk *acp;
6868 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6869 /* find SCTP_ASCONF chunk in queue */
6870 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6872 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6873 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6878 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6880 sctp_m_freem(chk->data);
6883 asoc->ctrl_queue_cnt--;
6884 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6891 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6892 struct sctp_association *asoc,
6893 struct sctp_tmit_chunk **data_list,
6895 struct sctp_nets *net)
6898 struct sctp_tmit_chunk *tp1;
6900 for (i = 0; i < bundle_at; i++) {
6901 /* off of the send queue */
6902 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6903 asoc->send_queue_cnt--;
6906 * Any chunk NOT 0 you zap the time chunk 0 gets
6907 * zapped or set based on if a RTO measurment is
6910 data_list[i]->do_rtt = 0;
6913 data_list[i]->sent_rcv_time = net->last_sent_time;
6914 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6915 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6916 if (data_list[i]->whoTo == NULL) {
6917 data_list[i]->whoTo = net;
6918 atomic_add_int(&net->ref_count, 1);
6920 /* on to the sent queue */
6921 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6922 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6923 struct sctp_tmit_chunk *tpp;
6925 /* need to move back */
6927 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6929 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6933 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6936 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6938 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6943 /* This does not lower until the cum-ack passes it */
6944 asoc->sent_queue_cnt++;
6945 if ((asoc->peers_rwnd <= 0) &&
6946 (asoc->total_flight == 0) &&
6948 /* Mark the chunk as being a window probe */
6949 SCTP_STAT_INCR(sctps_windowprobed);
6951 #ifdef SCTP_AUDITING_ENABLED
6952 sctp_audit_log(0xC2, 3);
6954 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6955 data_list[i]->snd_count = 1;
6956 data_list[i]->rec.data.chunk_was_revoked = 0;
6957 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6958 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6959 data_list[i]->whoTo->flight_size,
6960 data_list[i]->book_size,
6961 (uintptr_t) data_list[i]->whoTo,
6962 data_list[i]->rec.data.TSN_seq);
6964 sctp_flight_size_increase(data_list[i]);
6965 sctp_total_flight_increase(stcb, data_list[i]);
6966 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6967 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6968 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6970 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6971 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6972 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6973 /* SWS sender side engages */
6974 asoc->peers_rwnd = 0;
6977 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6978 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6983 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6984 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6989 struct sctp_tmit_chunk *chk, *nchk;
6991 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6992 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6993 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6994 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6995 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
6996 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
6997 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
6998 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
6999 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7000 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7001 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7002 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7003 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7004 /* Stray chunks must be cleaned up */
7006 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7008 sctp_m_freem(chk->data);
7011 asoc->ctrl_queue_cnt--;
7012 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7013 asoc->fwd_tsn_cnt--;
7014 sctp_free_a_chunk(stcb, chk, so_locked);
7015 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7016 /* special handling, we must look into the param */
7017 if (chk != asoc->str_reset) {
7018 goto clean_up_anyway;
7026 sctp_can_we_split_this(struct sctp_tcb *stcb,
7028 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7031 * Make a decision on if I should split a msg into multiple parts.
7032 * This is only asked of incomplete messages.
7036 * If we are doing EEOR we need to always send it if its the
7037 * entire thing, since it might be all the guy is putting in
7040 if (goal_mtu >= length) {
7042 * If we have data outstanding,
7043 * we get another chance when the sack
7044 * arrives to transmit - wait for more data
7046 if (stcb->asoc.total_flight == 0) {
7048 * If nothing is in flight, we zero the
7056 /* You can fill the rest */
7061 * For those strange folk that make the send buffer
7062 * smaller than our fragmentation point, we can't
7063 * get a full msg in so we have to allow splitting.
7065 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7068 if ((length <= goal_mtu) ||
7069 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7070 /* Sub-optimial residual don't split in non-eeor mode. */
7074 * If we reach here length is larger than the goal_mtu. Do we wish
7075 * to split it for the sake of packet putting together?
7077 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7078 /* Its ok to split it */
7079 return (min(goal_mtu, frag_point));
7081 /* Nope, can't split */
7087 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7088 struct sctp_stream_out *strq,
7090 uint32_t frag_point,
7096 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7101 /* Move from the stream to the send_queue keeping track of the total */
7102 struct sctp_association *asoc;
7103 struct sctp_stream_queue_pending *sp;
7104 struct sctp_tmit_chunk *chk;
7105 struct sctp_data_chunk *dchkh;
7106 uint32_t to_move, length;
7107 uint8_t rcv_flags = 0;
7109 uint8_t send_lock_up = 0;
7111 SCTP_TCB_LOCK_ASSERT(stcb);
7114 /* sa_ignore FREED_MEMORY */
7115 sp = TAILQ_FIRST(&strq->outqueue);
7118 if (send_lock_up == 0) {
7119 SCTP_TCB_SEND_LOCK(stcb);
7122 sp = TAILQ_FIRST(&strq->outqueue);
7126 if (strq->last_msg_incomplete) {
7127 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7129 strq->last_msg_incomplete);
7130 strq->last_msg_incomplete = 0;
7134 SCTP_TCB_SEND_UNLOCK(stcb);
7139 if ((sp->msg_is_complete) && (sp->length == 0)) {
7140 if (sp->sender_all_done) {
7142 * We are doing differed cleanup. Last time through
7143 * when we took all the data the sender_all_done was
7146 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7147 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7148 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7149 sp->sender_all_done,
7151 sp->msg_is_complete,
7155 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7156 SCTP_TCB_SEND_LOCK(stcb);
7159 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7160 TAILQ_REMOVE(&strq->outqueue, sp, next);
7161 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7163 sctp_free_remote_addr(sp->net);
7167 sctp_m_freem(sp->data);
7170 sctp_free_a_strmoq(stcb, sp, so_locked);
7171 /* we can't be locked to it */
7173 stcb->asoc.locked_on_sending = NULL;
7175 SCTP_TCB_SEND_UNLOCK(stcb);
7178 /* back to get the next msg */
7182 * sender just finished this but still holds a
7191 /* is there some to get */
7192 if (sp->length == 0) {
7198 } else if (sp->discard_rest) {
7199 if (send_lock_up == 0) {
7200 SCTP_TCB_SEND_LOCK(stcb);
7203 /* Whack down the size */
7204 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7205 if ((stcb->sctp_socket != NULL) && \
7206 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7207 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7208 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7211 sctp_m_freem(sp->data);
7213 sp->tail_mbuf = NULL;
7223 some_taken = sp->some_taken;
7224 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7225 sp->msg_is_complete = 1;
7228 length = sp->length;
7229 if (sp->msg_is_complete) {
7230 /* The message is complete */
7231 to_move = min(length, frag_point);
7232 if (to_move == length) {
7233 /* All of it fits in the MTU */
7234 if (sp->some_taken) {
7235 rcv_flags |= SCTP_DATA_LAST_FRAG;
7236 sp->put_last_out = 1;
7238 rcv_flags |= SCTP_DATA_NOT_FRAG;
7239 sp->put_last_out = 1;
7242 /* Not all of it fits, we fragment */
7243 if (sp->some_taken == 0) {
7244 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7249 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7252 * We use a snapshot of length in case it
7253 * is expanding during the compare.
7258 if (to_move >= llen) {
7260 if (send_lock_up == 0) {
7262 * We are taking all of an incomplete msg
7263 * thus we need a send lock.
7265 SCTP_TCB_SEND_LOCK(stcb);
7267 if (sp->msg_is_complete) {
7269 * the sender finished the
7276 if (sp->some_taken == 0) {
7277 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7281 /* Nothing to take. */
7282 if (sp->some_taken) {
7291 /* If we reach here, we can copy out a chunk */
7292 sctp_alloc_a_chunk(stcb, chk);
7294 /* No chunk memory */
7300 * Setup for unordered if needed by looking at the user sent info
7303 if (sp->sinfo_flags & SCTP_UNORDERED) {
7304 rcv_flags |= SCTP_DATA_UNORDERED;
7306 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7307 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7308 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7310 /* clear out the chunk before setting up */
7311 memset(chk, 0, sizeof(*chk));
7312 chk->rec.data.rcv_flags = rcv_flags;
7314 if (to_move >= length) {
7315 /* we think we can steal the whole thing */
7316 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7317 SCTP_TCB_SEND_LOCK(stcb);
7320 if (to_move < sp->length) {
7321 /* bail, it changed */
7324 chk->data = sp->data;
7325 chk->last_mbuf = sp->tail_mbuf;
7326 /* register the stealing */
7327 sp->data = sp->tail_mbuf = NULL;
7332 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_DONTWAIT);
7333 chk->last_mbuf = NULL;
7334 if (chk->data == NULL) {
7335 sp->some_taken = some_taken;
7336 sctp_free_a_chunk(stcb, chk, so_locked);
7341 #ifdef SCTP_MBUF_LOGGING
7342 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7345 for (mat = chk->data; mat; mat = SCTP_BUF_NEXT(mat)) {
7346 if (SCTP_BUF_IS_EXTENDED(mat)) {
7347 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
7352 /* Pull off the data */
7353 m_adj(sp->data, to_move);
7354 /* Now lets work our way down and compact it */
7356 while (m && (SCTP_BUF_LEN(m) == 0)) {
7357 sp->data = SCTP_BUF_NEXT(m);
7358 SCTP_BUF_NEXT(m) = NULL;
7359 if (sp->tail_mbuf == m) {
7361 * Freeing tail? TSNH since
7362 * we supposedly were taking less
7363 * than the sp->length.
7366 panic("Huh, freing tail? - TSNH");
7368 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7369 sp->tail_mbuf = sp->data = NULL;
7378 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7379 chk->copy_by_ref = 1;
7381 chk->copy_by_ref = 0;
7384 * get last_mbuf and counts of mb useage This is ugly but hopefully
7385 * its only one mbuf.
7387 if (chk->last_mbuf == NULL) {
7388 chk->last_mbuf = chk->data;
7389 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7390 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7393 if (to_move > length) {
7394 /*- This should not happen either
7395 * since we always lower to_move to the size
7396 * of sp->length if its larger.
7399 panic("Huh, how can to_move be larger?");
7401 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7405 atomic_subtract_int(&sp->length, to_move);
7407 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7408 /* Not enough room for a chunk header, get some */
7411 m = sctp_get_mbuf_for_msg(1, 0, M_DONTWAIT, 0, MT_DATA);
7414 * we're in trouble here. _PREPEND below will free
7415 * all the data if there is no leading space, so we
7416 * must put the data back and restore.
7418 if (send_lock_up == 0) {
7419 SCTP_TCB_SEND_LOCK(stcb);
7422 if (chk->data == NULL) {
7423 /* unsteal the data */
7424 sp->data = chk->data;
7425 sp->tail_mbuf = chk->last_mbuf;
7429 /* reassemble the data */
7431 sp->data = chk->data;
7432 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7434 sp->some_taken = some_taken;
7435 atomic_add_int(&sp->length, to_move);
7438 sctp_free_a_chunk(stcb, chk, so_locked);
7442 SCTP_BUF_LEN(m) = 0;
7443 SCTP_BUF_NEXT(m) = chk->data;
7445 M_ALIGN(chk->data, 4);
7448 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_DONTWAIT);
7449 if (chk->data == NULL) {
7450 /* HELP, TSNH since we assured it would not above? */
7452 panic("prepend failes HELP?");
7454 SCTP_PRINTF("prepend fails HELP?\n");
7455 sctp_free_a_chunk(stcb, chk, so_locked);
7461 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7462 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7463 chk->book_size_scale = 0;
7464 chk->sent = SCTP_DATAGRAM_UNSENT;
7467 chk->asoc = &stcb->asoc;
7468 chk->pad_inplace = 0;
7469 chk->no_fr_allowed = 0;
7470 chk->rec.data.stream_seq = sp->strseq;
7471 chk->rec.data.stream_number = sp->stream;
7472 chk->rec.data.payloadtype = sp->ppid;
7473 chk->rec.data.context = sp->context;
7474 chk->rec.data.doing_fast_retransmit = 0;
7476 chk->rec.data.timetodrop = sp->ts;
7477 chk->flags = sp->act_flags;
7480 chk->whoTo = sp->net;
7481 atomic_add_int(&chk->whoTo->ref_count, 1);
7485 if (sp->holds_key_ref) {
7486 chk->auth_keyid = sp->auth_keyid;
7487 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7488 chk->holds_key_ref = 1;
7490 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7491 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7492 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7493 (uintptr_t) stcb, sp->length,
7494 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7495 chk->rec.data.TSN_seq);
7497 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7499 * Put the rest of the things in place now. Size was done earlier in
7500 * previous loop prior to padding.
7503 #ifdef SCTP_ASOCLOG_OF_TSNS
7504 SCTP_TCB_LOCK_ASSERT(stcb);
7505 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7506 asoc->tsn_out_at = 0;
7507 asoc->tsn_out_wrapped = 1;
7509 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7510 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7511 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7512 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7513 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7514 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7515 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7516 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7520 dchkh->ch.chunk_type = SCTP_DATA;
7521 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7522 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7523 dchkh->dp.stream_id = htons(strq->stream_no);
7524 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7525 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7526 dchkh->ch.chunk_length = htons(chk->send_size);
7527 /* Now advance the chk->send_size by the actual pad needed. */
7528 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7533 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7534 if (sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf) == 0) {
7535 chk->pad_inplace = 1;
7537 if ((lm = SCTP_BUF_NEXT(chk->last_mbuf)) != NULL) {
7538 /* pad added an mbuf */
7539 chk->last_mbuf = lm;
7541 chk->send_size += pads;
7543 /* We only re-set the policy if it is on */
7544 if (sp->pr_sctp_on) {
7545 sctp_set_prsctp_policy(sp);
7546 asoc->pr_sctp_cnt++;
7547 chk->pr_sctp_on = 1;
7549 chk->pr_sctp_on = 0;
7551 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7552 /* All done pull and kill the message */
7553 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7554 if (sp->put_last_out == 0) {
7555 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7556 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7557 sp->sender_all_done,
7559 sp->msg_is_complete,
7563 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7564 SCTP_TCB_SEND_LOCK(stcb);
7567 TAILQ_REMOVE(&strq->outqueue, sp, next);
7568 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7570 sctp_free_remote_addr(sp->net);
7574 sctp_m_freem(sp->data);
7577 sctp_free_a_strmoq(stcb, sp, so_locked);
7579 /* we can't be locked to it */
7581 stcb->asoc.locked_on_sending = NULL;
7583 /* more to go, we are locked */
7586 asoc->chunks_on_out_queue++;
7587 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7588 asoc->send_queue_cnt++;
7591 SCTP_TCB_SEND_UNLOCK(stcb);
7598 sctp_fill_outqueue(struct sctp_tcb *stcb,
7599 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7600 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7605 struct sctp_association *asoc;
7606 struct sctp_stream_out *strq;
7607 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7610 SCTP_TCB_LOCK_ASSERT(stcb);
7612 switch (net->ro._l_addr.sa.sa_family) {
7615 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7620 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7625 goal_mtu = net->mtu;
7628 /* Need an allowance for the data chunk header too */
7629 goal_mtu -= sizeof(struct sctp_data_chunk);
7631 /* must make even word boundary */
7632 goal_mtu &= 0xfffffffc;
7633 if (asoc->locked_on_sending) {
7634 /* We are stuck on one stream until the message completes. */
7635 strq = asoc->locked_on_sending;
7638 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7641 while ((goal_mtu > 0) && strq) {
7644 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7645 &giveup, eeor_mode, &bail, so_locked);
7647 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7650 asoc->locked_on_sending = strq;
7651 if ((moved_how_much == 0) || (giveup) || bail)
7652 /* no more to move for now */
7655 asoc->locked_on_sending = NULL;
7656 if ((giveup) || bail) {
7659 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7664 total_moved += moved_how_much;
7665 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7666 goal_mtu &= 0xfffffffc;
7671 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7673 if (total_moved == 0) {
7674 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7675 (net == stcb->asoc.primary_destination)) {
7676 /* ran dry for primary network net */
7677 SCTP_STAT_INCR(sctps_primary_randry);
7678 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7679 /* ran dry with CMT on */
7680 SCTP_STAT_INCR(sctps_cmt_randry);
7686 sctp_fix_ecn_echo(struct sctp_association *asoc)
7688 struct sctp_tmit_chunk *chk;
7690 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7691 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7692 chk->sent = SCTP_DATAGRAM_UNSENT;
7698 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7700 struct sctp_association *asoc;
7701 struct sctp_tmit_chunk *chk;
7702 struct sctp_stream_queue_pending *sp;
7709 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7710 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7711 if (sp->net == net) {
7712 sctp_free_remote_addr(sp->net);
7717 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7718 if (chk->whoTo == net) {
7719 sctp_free_remote_addr(chk->whoTo);
7726 sctp_med_chunk_output(struct sctp_inpcb *inp,
7727 struct sctp_tcb *stcb,
7728 struct sctp_association *asoc,
7731 int control_only, int from_where,
7732 struct timeval *now, int *now_filled, int frag_point, int so_locked
7733 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7739 * Ok this is the generic chunk service queue. we must do the
7740 * following: - Service the stream queue that is next, moving any
7741 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7742 * LAST to the out queue in one pass) and assigning TSN's - Check to
7743 * see if the cwnd/rwnd allows any output, if so we go ahead and
7744 * fomulate and send the low level chunks. Making sure to combine
7745 * any control in the control chunk queue also.
7747 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7748 struct mbuf *outchain, *endoutchain;
7749 struct sctp_tmit_chunk *chk, *nchk;
7751 /* temp arrays for unlinking */
7752 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7753 int no_fragmentflg, error;
7754 unsigned int max_rwnd_per_dest, max_send_per_dest;
7755 int one_chunk, hbflag, skip_data_for_this_net;
7756 int asconf, cookie, no_out_cnt;
7757 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7758 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7760 uint32_t auth_offset = 0;
7761 struct sctp_auth_chunk *auth = NULL;
7762 uint16_t auth_keyid;
7763 int override_ok = 1;
7764 int skip_fill_up = 0;
7765 int data_auth_reqd = 0;
7768 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7774 auth_keyid = stcb->asoc.authinfo.active_keyid;
7776 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7777 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7778 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7783 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7785 * First lets prime the pump. For each destination, if there is room
7786 * in the flight size, attempt to pull an MTU's worth out of the
7787 * stream queues into the general send_queue
7789 #ifdef SCTP_AUDITING_ENABLED
7790 sctp_audit_log(0xC2, 2);
7792 SCTP_TCB_LOCK_ASSERT(stcb);
7794 if ((control_only) || (asoc->stream_reset_outstanding))
7799 /* Nothing to possible to send? */
7800 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7801 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7802 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7803 TAILQ_EMPTY(&asoc->send_queue) &&
7804 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7809 if (asoc->peers_rwnd == 0) {
7810 /* No room in peers rwnd */
7812 if (asoc->total_flight > 0) {
7813 /* we are allowed one chunk in flight */
7817 if (stcb->asoc.ecn_echo_cnt_onq) {
7818 /* Record where a sack goes, if any */
7819 if (no_data_chunks &&
7820 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7821 /* Nothing but ECNe to send - we don't do that */
7822 goto nothing_to_send;
7824 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7825 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7826 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7827 sack_goes_to = chk->whoTo;
7832 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7833 if (stcb->sctp_socket)
7834 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7836 max_send_per_dest = 0;
7837 if (no_data_chunks == 0) {
7838 /* How many non-directed chunks are there? */
7839 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7840 if (chk->whoTo == NULL) {
7842 * We already have non-directed chunks on
7843 * the queue, no need to do a fill-up.
7851 if ((no_data_chunks == 0) &&
7852 (skip_fill_up == 0) &&
7853 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7854 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7856 * This for loop we are in takes in each net, if
7857 * its's got space in cwnd and has data sent to it
7858 * (when CMT is off) then it calls
7859 * sctp_fill_outqueue for the net. This gets data on
7860 * the send queue for that network.
7862 * In sctp_fill_outqueue TSN's are assigned and data is
7863 * copied out of the stream buffers. Note mostly
7864 * copy by reference (we hope).
7866 net->window_probe = 0;
7867 if ((net != stcb->asoc.alternate) &&
7868 ((net->dest_state & SCTP_ADDR_PF) ||
7869 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7870 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7871 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7872 sctp_log_cwnd(stcb, net, 1,
7873 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7877 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7878 (net->flight_size == 0)) {
7879 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7881 if (net->flight_size >= net->cwnd) {
7882 /* skip this network, no room - can't fill */
7883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7884 sctp_log_cwnd(stcb, net, 3,
7885 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7889 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7890 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7892 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7894 /* memory alloc failure */
7900 /* now service each destination and send out what we can for it */
7901 /* Nothing to send? */
7902 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7903 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7904 TAILQ_EMPTY(&asoc->send_queue)) {
7908 if (asoc->sctp_cmt_on_off > 0) {
7909 /* get the last start point */
7910 start_at = asoc->last_net_cmt_send_started;
7911 if (start_at == NULL) {
7912 /* null so to beginning */
7913 start_at = TAILQ_FIRST(&asoc->nets);
7915 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7916 if (start_at == NULL) {
7917 start_at = TAILQ_FIRST(&asoc->nets);
7920 asoc->last_net_cmt_send_started = start_at;
7922 start_at = TAILQ_FIRST(&asoc->nets);
7924 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7925 if (chk->whoTo == NULL) {
7926 if (asoc->alternate) {
7927 chk->whoTo = asoc->alternate;
7929 chk->whoTo = asoc->primary_destination;
7931 atomic_add_int(&chk->whoTo->ref_count, 1);
7934 old_start_at = NULL;
7935 again_one_more_time:
7936 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7937 /* how much can we send? */
7938 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7939 if (old_start_at && (old_start_at == net)) {
7940 /* through list ocmpletely. */
7944 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7945 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7946 (net->flight_size >= net->cwnd)) {
7948 * Nothing on control or asconf and flight is full,
7949 * we can skip even in the CMT case.
7954 endoutchain = outchain = NULL;
7957 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7958 skip_data_for_this_net = 1;
7960 skip_data_for_this_net = 0;
7962 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
7964 * if we have a route and an ifp check to see if we
7965 * have room to send to this guy
7969 ifp = net->ro.ro_rt->rt_ifp;
7970 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
7971 SCTP_STAT_INCR(sctps_ifnomemqueued);
7972 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
7973 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
7978 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7981 mtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
7986 mtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
7996 if (mtu > asoc->peers_rwnd) {
7997 if (asoc->total_flight > 0) {
7998 /* We have a packet in flight somewhere */
7999 r_mtu = asoc->peers_rwnd;
8001 /* We are always allowed to send one MTU out */
8008 /************************/
8009 /* ASCONF transmission */
8010 /************************/
8011 /* Now first lets go through the asconf queue */
8012 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
8013 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
8016 if (chk->whoTo == NULL) {
8017 if (asoc->alternate == NULL) {
8018 if (asoc->primary_destination != net) {
8022 if (asoc->alternate != net) {
8027 if (chk->whoTo != net) {
8031 if (chk->data == NULL) {
8034 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8035 chk->sent != SCTP_DATAGRAM_RESEND) {
8039 * if no AUTH is yet included and this chunk
8040 * requires it, make sure to account for it. We
8041 * don't apply the size until the AUTH chunk is
8042 * actually added below in case there is no room for
8043 * this chunk. NOTE: we overload the use of "omtu"
8046 if ((auth == NULL) &&
8047 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8048 stcb->asoc.peer_auth_chunks)) {
8049 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8052 /* Here we do NOT factor the r_mtu */
8053 if ((chk->send_size < (int)(mtu - omtu)) ||
8054 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8056 * We probably should glom the mbuf chain
8057 * from the chk->data for control but the
8058 * problem is it becomes yet one more level
8059 * of tracking to do if for some reason
8060 * output fails. Then I have got to
8061 * reconstruct the merged control chain.. el
8062 * yucko.. for now we take the easy way and
8066 * Add an AUTH chunk, if chunk requires it
8067 * save the offset into the chain for AUTH
8069 if ((auth == NULL) &&
8070 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8071 stcb->asoc.peer_auth_chunks))) {
8072 outchain = sctp_add_auth_chunk(outchain,
8077 chk->rec.chunk_id.id);
8078 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8080 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8081 (int)chk->rec.chunk_id.can_take_data,
8082 chk->send_size, chk->copy_by_ref);
8083 if (outchain == NULL) {
8085 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8088 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8089 /* update our MTU size */
8090 if (mtu > (chk->send_size + omtu))
8091 mtu -= (chk->send_size + omtu);
8094 to_out += (chk->send_size + omtu);
8095 /* Do clear IP_DF ? */
8096 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8099 if (chk->rec.chunk_id.can_take_data)
8102 * set hb flag since we can use these for
8108 * should sysctl this: don't bundle data
8109 * with ASCONF since it requires AUTH
8112 chk->sent = SCTP_DATAGRAM_SENT;
8113 if (chk->whoTo == NULL) {
8115 atomic_add_int(&net->ref_count, 1);
8120 * Ok we are out of room but we can
8121 * output without effecting the
8122 * flight size since this little guy
8123 * is a control only packet.
8125 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8127 * do NOT clear the asconf flag as
8128 * it is used to do appropriate
8129 * source address selection.
8131 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8132 (struct sockaddr *)&net->ro._l_addr,
8133 outchain, auth_offset, auth,
8134 stcb->asoc.authinfo.active_keyid,
8135 no_fragmentflg, 0, asconf,
8136 inp->sctp_lport, stcb->rport,
8137 htonl(stcb->asoc.peer_vtag),
8138 net->port, so_locked, NULL, NULL))) {
8139 if (error == ENOBUFS) {
8140 asoc->ifp_had_enobuf = 1;
8141 SCTP_STAT_INCR(sctps_lowlevelerr);
8143 if (from_where == 0) {
8144 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8146 if (*now_filled == 0) {
8147 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8149 *now = net->last_sent_time;
8151 net->last_sent_time = *now;
8154 /* error, could not output */
8155 if (error == EHOSTUNREACH) {
8161 sctp_move_chunks_from_net(stcb, net);
8166 asoc->ifp_had_enobuf = 0;
8167 if (*now_filled == 0) {
8168 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8170 *now = net->last_sent_time;
8172 net->last_sent_time = *now;
8176 * increase the number we sent, if a
8177 * cookie is sent we don't tell them
8180 outchain = endoutchain = NULL;
8184 *num_out += ctl_cnt;
8185 /* recalc a clean slate and setup */
8186 switch (net->ro._l_addr.sa.sa_family) {
8189 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8194 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8207 /************************/
8208 /* Control transmission */
8209 /************************/
8210 /* Now first lets go through the control queue */
8211 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8212 if ((sack_goes_to) &&
8213 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8214 (chk->whoTo != sack_goes_to)) {
8216 * if we have a sack in queue, and we are
8217 * looking at an ecn echo that is NOT queued
8218 * to where the sack is going..
8220 if (chk->whoTo == net) {
8222 * Don't transmit it to where its
8223 * going (current net)
8226 } else if (sack_goes_to == net) {
8228 * But do transmit it to this
8231 goto skip_net_check;
8234 if (chk->whoTo == NULL) {
8235 if (asoc->alternate == NULL) {
8236 if (asoc->primary_destination != net) {
8240 if (asoc->alternate != net) {
8245 if (chk->whoTo != net) {
8250 if (chk->data == NULL) {
8253 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8255 * It must be unsent. Cookies and ASCONF's
8256 * hang around but there timers will force
8257 * when marked for resend.
8262 * if no AUTH is yet included and this chunk
8263 * requires it, make sure to account for it. We
8264 * don't apply the size until the AUTH chunk is
8265 * actually added below in case there is no room for
8266 * this chunk. NOTE: we overload the use of "omtu"
8269 if ((auth == NULL) &&
8270 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8271 stcb->asoc.peer_auth_chunks)) {
8272 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8275 /* Here we do NOT factor the r_mtu */
8276 if ((chk->send_size <= (int)(mtu - omtu)) ||
8277 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8279 * We probably should glom the mbuf chain
8280 * from the chk->data for control but the
8281 * problem is it becomes yet one more level
8282 * of tracking to do if for some reason
8283 * output fails. Then I have got to
8284 * reconstruct the merged control chain.. el
8285 * yucko.. for now we take the easy way and
8289 * Add an AUTH chunk, if chunk requires it
8290 * save the offset into the chain for AUTH
8292 if ((auth == NULL) &&
8293 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8294 stcb->asoc.peer_auth_chunks))) {
8295 outchain = sctp_add_auth_chunk(outchain,
8300 chk->rec.chunk_id.id);
8301 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8303 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8304 (int)chk->rec.chunk_id.can_take_data,
8305 chk->send_size, chk->copy_by_ref);
8306 if (outchain == NULL) {
8308 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8311 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8312 /* update our MTU size */
8313 if (mtu > (chk->send_size + omtu))
8314 mtu -= (chk->send_size + omtu);
8317 to_out += (chk->send_size + omtu);
8318 /* Do clear IP_DF ? */
8319 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8322 if (chk->rec.chunk_id.can_take_data)
8324 /* Mark things to be removed, if needed */
8325 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8326 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8327 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8328 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8329 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8330 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8331 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8332 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8333 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8334 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8335 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8336 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8339 /* remove these chunks at the end */
8340 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8341 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8342 /* turn off the timer */
8343 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8344 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8345 inp, stcb, net, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8351 * Other chunks, since they have
8352 * timers running (i.e. COOKIE) we
8353 * just "trust" that it gets sent or
8357 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8360 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8362 * Increment ecne send count
8363 * here this means we may be
8364 * over-zealous in our
8365 * counting if the send
8366 * fails, but its the best
8367 * place to do it (we used
8368 * to do it in the queue of
8369 * the chunk, but that did
8370 * not tell how many times
8373 SCTP_STAT_INCR(sctps_sendecne);
8375 chk->sent = SCTP_DATAGRAM_SENT;
8376 if (chk->whoTo == NULL) {
8378 atomic_add_int(&net->ref_count, 1);
8384 * Ok we are out of room but we can
8385 * output without effecting the
8386 * flight size since this little guy
8387 * is a control only packet.
8390 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8392 * do NOT clear the asconf
8393 * flag as it is used to do
8394 * appropriate source
8395 * address selection.
8399 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8402 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8403 (struct sockaddr *)&net->ro._l_addr,
8406 stcb->asoc.authinfo.active_keyid,
8407 no_fragmentflg, 0, asconf,
8408 inp->sctp_lport, stcb->rport,
8409 htonl(stcb->asoc.peer_vtag),
8410 net->port, so_locked, NULL, NULL))) {
8411 if (error == ENOBUFS) {
8412 asoc->ifp_had_enobuf = 1;
8413 SCTP_STAT_INCR(sctps_lowlevelerr);
8415 if (from_where == 0) {
8416 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8418 /* error, could not output */
8420 if (*now_filled == 0) {
8421 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8423 *now = net->last_sent_time;
8425 net->last_sent_time = *now;
8429 if (error == EHOSTUNREACH) {
8435 sctp_move_chunks_from_net(stcb, net);
8440 asoc->ifp_had_enobuf = 0;
8441 /* Only HB or ASCONF advances time */
8443 if (*now_filled == 0) {
8444 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8446 *now = net->last_sent_time;
8448 net->last_sent_time = *now;
8453 * increase the number we sent, if a
8454 * cookie is sent we don't tell them
8457 outchain = endoutchain = NULL;
8461 *num_out += ctl_cnt;
8462 /* recalc a clean slate and setup */
8463 switch (net->ro._l_addr.sa.sa_family) {
8466 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8471 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8484 /* JRI: if dest is in PF state, do not send data to it */
8485 if ((asoc->sctp_cmt_on_off > 0) &&
8486 (net != stcb->asoc.alternate) &&
8487 (net->dest_state & SCTP_ADDR_PF)) {
8490 if (net->flight_size >= net->cwnd) {
8493 if ((asoc->sctp_cmt_on_off > 0) &&
8494 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8495 (net->flight_size > max_rwnd_per_dest)) {
8499 * We need a specific accounting for the usage of the send
8500 * buffer. We also need to check the number of messages per
8501 * net. For now, this is better than nothing and it disabled
8504 if ((asoc->sctp_cmt_on_off > 0) &&
8505 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8506 (max_send_per_dest > 0) &&
8507 (net->flight_size > max_send_per_dest)) {
8510 /*********************/
8511 /* Data transmission */
8512 /*********************/
8514 * if AUTH for DATA is required and no AUTH has been added
8515 * yet, account for this in the mtu now... if no data can be
8516 * bundled, this adjustment won't matter anyways since the
8517 * packet will be going out...
8519 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8520 stcb->asoc.peer_auth_chunks);
8521 if (data_auth_reqd && (auth == NULL)) {
8522 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8524 /* now lets add any data within the MTU constraints */
8525 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8527 if (net->mtu > (sizeof(struct ip) + sizeof(struct sctphdr)))
8528 omtu = net->mtu - (sizeof(struct ip) + sizeof(struct sctphdr));
8534 if (net->mtu > (sizeof(struct ip6_hdr) + sizeof(struct sctphdr)))
8535 omtu = net->mtu - (sizeof(struct ip6_hdr) + sizeof(struct sctphdr));
8545 if ((((asoc->state & SCTP_STATE_OPEN) == SCTP_STATE_OPEN) &&
8546 (skip_data_for_this_net == 0)) ||
8548 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8549 if (no_data_chunks) {
8550 /* let only control go out */
8554 if (net->flight_size >= net->cwnd) {
8555 /* skip this net, no room for data */
8559 if ((chk->whoTo != NULL) &&
8560 (chk->whoTo != net)) {
8561 /* Don't send the chunk on this net */
8564 if (asoc->sctp_cmt_on_off == 0) {
8565 if ((asoc->alternate) &&
8566 (asoc->alternate != net) &&
8567 (chk->whoTo == NULL)) {
8569 } else if ((net != asoc->primary_destination) &&
8570 (asoc->alternate == NULL) &&
8571 (chk->whoTo == NULL)) {
8575 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8577 * strange, we have a chunk that is
8578 * to big for its destination and
8579 * yet no fragment ok flag.
8580 * Something went wrong when the
8581 * PMTU changed...we did not mark
8582 * this chunk for some reason?? I
8583 * will fix it here by letting IP
8584 * fragment it for now and printing
8585 * a warning. This really should not
8588 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8589 chk->send_size, mtu);
8590 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8592 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8593 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8594 struct sctp_data_chunk *dchkh;
8596 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8597 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8599 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8600 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8601 /* ok we will add this one */
8604 * Add an AUTH chunk, if chunk
8605 * requires it, save the offset into
8606 * the chain for AUTH
8608 if (data_auth_reqd) {
8610 outchain = sctp_add_auth_chunk(outchain,
8616 auth_keyid = chk->auth_keyid;
8618 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8619 } else if (override_ok) {
8624 auth_keyid = chk->auth_keyid;
8626 } else if (auth_keyid != chk->auth_keyid) {
8634 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8635 chk->send_size, chk->copy_by_ref);
8636 if (outchain == NULL) {
8637 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8638 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8639 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8642 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8645 /* upate our MTU size */
8646 /* Do clear IP_DF ? */
8647 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8650 /* unsigned subtraction of mtu */
8651 if (mtu > chk->send_size)
8652 mtu -= chk->send_size;
8655 /* unsigned subtraction of r_mtu */
8656 if (r_mtu > chk->send_size)
8657 r_mtu -= chk->send_size;
8661 to_out += chk->send_size;
8662 if ((to_out > mx_mtu) && no_fragmentflg) {
8664 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8666 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8670 chk->window_probe = 0;
8671 data_list[bundle_at++] = chk;
8672 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8675 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8676 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8677 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8679 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8681 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8682 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8692 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8694 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8695 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8696 data_list[0]->window_probe = 1;
8697 net->window_probe = 1;
8703 * Must be sent in order of the
8704 * TSN's (on a network)
8708 } /* for (chunk gather loop for this net) */
8709 } /* if asoc.state OPEN */
8711 /* Is there something to send for this destination? */
8713 /* We may need to start a control timer or two */
8715 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8718 * do NOT clear the asconf flag as it is
8719 * used to do appropriate source address
8724 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8727 /* must start a send timer if data is being sent */
8728 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8730 * no timer running on this destination
8733 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8735 /* Now send it, if there is anything to send :> */
8736 if ((error = sctp_lowlevel_chunk_output(inp,
8739 (struct sockaddr *)&net->ro._l_addr,
8747 inp->sctp_lport, stcb->rport,
8748 htonl(stcb->asoc.peer_vtag),
8749 net->port, so_locked, NULL, NULL))) {
8750 /* error, we could not output */
8751 if (error == ENOBUFS) {
8752 SCTP_STAT_INCR(sctps_lowlevelerr);
8753 asoc->ifp_had_enobuf = 1;
8755 if (from_where == 0) {
8756 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8758 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8760 if (*now_filled == 0) {
8761 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8763 *now = net->last_sent_time;
8765 net->last_sent_time = *now;
8769 if (error == EHOSTUNREACH) {
8771 * Destination went unreachable
8774 sctp_move_chunks_from_net(stcb, net);
8778 * I add this line to be paranoid. As far as
8779 * I can tell the continue, takes us back to
8780 * the top of the for, but just to make sure
8781 * I will reset these again here.
8783 ctl_cnt = bundle_at = 0;
8784 continue; /* This takes us back to the
8785 * for() for the nets. */
8787 asoc->ifp_had_enobuf = 0;
8792 if (bundle_at || hbflag) {
8793 /* For data/asconf and hb set time */
8794 if (*now_filled == 0) {
8795 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
8797 *now = net->last_sent_time;
8799 net->last_sent_time = *now;
8803 *num_out += (ctl_cnt + bundle_at);
8806 /* setup for a RTO measurement */
8807 tsns_sent = data_list[0]->rec.data.TSN_seq;
8808 /* fill time if not already filled */
8809 if (*now_filled == 0) {
8810 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8812 *now = asoc->time_last_sent;
8814 asoc->time_last_sent = *now;
8816 if (net->rto_needed) {
8817 data_list[0]->do_rtt = 1;
8818 net->rto_needed = 0;
8820 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8821 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8827 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8828 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8831 if (old_start_at == NULL) {
8832 old_start_at = start_at;
8833 start_at = TAILQ_FIRST(&asoc->nets);
8835 goto again_one_more_time;
8838 * At the end there should be no NON timed chunks hanging on this
8841 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8842 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8844 if ((*num_out == 0) && (*reason_code == 0)) {
8849 sctp_clean_up_ctl(stcb, asoc, so_locked);
8854 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8857 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8858 * the control chunk queue.
8860 struct sctp_chunkhdr *hdr;
8861 struct sctp_tmit_chunk *chk;
8864 SCTP_TCB_LOCK_ASSERT(stcb);
8865 sctp_alloc_a_chunk(stcb, chk);
8868 sctp_m_freem(op_err);
8871 chk->copy_by_ref = 0;
8872 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_DONTWAIT);
8873 if (op_err == NULL) {
8874 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8879 while (mat != NULL) {
8880 chk->send_size += SCTP_BUF_LEN(mat);
8881 mat = SCTP_BUF_NEXT(mat);
8883 chk->rec.chunk_id.id = SCTP_OPERATION_ERROR;
8884 chk->rec.chunk_id.can_take_data = 1;
8885 chk->sent = SCTP_DATAGRAM_UNSENT;
8888 chk->asoc = &stcb->asoc;
8891 hdr = mtod(op_err, struct sctp_chunkhdr *);
8892 hdr->chunk_type = SCTP_OPERATION_ERROR;
8893 hdr->chunk_flags = 0;
8894 hdr->chunk_length = htons(chk->send_size);
8895 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8898 chk->asoc->ctrl_queue_cnt++;
8902 sctp_send_cookie_echo(struct mbuf *m,
8904 struct sctp_tcb *stcb,
8905 struct sctp_nets *net)
8908 * pull out the cookie and put it at the front of the control chunk
8912 struct mbuf *cookie;
8913 struct sctp_paramhdr parm, *phdr;
8914 struct sctp_chunkhdr *hdr;
8915 struct sctp_tmit_chunk *chk;
8916 uint16_t ptype, plen;
8918 /* First find the cookie in the param area */
8920 at = offset + sizeof(struct sctp_init_chunk);
8922 SCTP_TCB_LOCK_ASSERT(stcb);
8924 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8928 ptype = ntohs(phdr->param_type);
8929 plen = ntohs(phdr->param_length);
8930 if (ptype == SCTP_STATE_COOKIE) {
8933 /* found the cookie */
8934 if ((pad = (plen % 4))) {
8937 cookie = SCTP_M_COPYM(m, at, plen, M_DONTWAIT);
8938 if (cookie == NULL) {
8942 #ifdef SCTP_MBUF_LOGGING
8943 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8946 for (mat = cookie; mat; mat = SCTP_BUF_NEXT(mat)) {
8947 if (SCTP_BUF_IS_EXTENDED(mat)) {
8948 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
8955 at += SCTP_SIZE32(plen);
8957 if (cookie == NULL) {
8958 /* Did not find the cookie */
8961 /* ok, we got the cookie lets change it into a cookie echo chunk */
8963 /* first the change from param to cookie */
8964 hdr = mtod(cookie, struct sctp_chunkhdr *);
8965 hdr->chunk_type = SCTP_COOKIE_ECHO;
8966 hdr->chunk_flags = 0;
8967 /* get the chunk stuff now and place it in the FRONT of the queue */
8968 sctp_alloc_a_chunk(stcb, chk);
8971 sctp_m_freem(cookie);
8974 chk->copy_by_ref = 0;
8975 chk->send_size = plen;
8976 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8977 chk->rec.chunk_id.can_take_data = 0;
8978 chk->sent = SCTP_DATAGRAM_UNSENT;
8980 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8981 chk->asoc = &stcb->asoc;
8984 atomic_add_int(&chk->whoTo->ref_count, 1);
8985 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8986 chk->asoc->ctrl_queue_cnt++;
8991 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8995 struct sctp_nets *net)
8998 * take a HB request and make it into a HB ack and send it.
9000 struct mbuf *outchain;
9001 struct sctp_chunkhdr *chdr;
9002 struct sctp_tmit_chunk *chk;
9006 /* must have a net pointer */
9009 outchain = SCTP_M_COPYM(m, offset, chk_length, M_DONTWAIT);
9010 if (outchain == NULL) {
9011 /* gak out of memory */
9014 #ifdef SCTP_MBUF_LOGGING
9015 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9018 for (mat = outchain; mat; mat = SCTP_BUF_NEXT(mat)) {
9019 if (SCTP_BUF_IS_EXTENDED(mat)) {
9020 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9025 chdr = mtod(outchain, struct sctp_chunkhdr *);
9026 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
9027 chdr->chunk_flags = 0;
9028 if (chk_length % 4) {
9030 uint32_t cpthis = 0;
9033 padlen = 4 - (chk_length % 4);
9034 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
9036 sctp_alloc_a_chunk(stcb, chk);
9039 sctp_m_freem(outchain);
9042 chk->copy_by_ref = 0;
9043 chk->send_size = chk_length;
9044 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
9045 chk->rec.chunk_id.can_take_data = 1;
9046 chk->sent = SCTP_DATAGRAM_UNSENT;
9049 chk->asoc = &stcb->asoc;
9050 chk->data = outchain;
9052 atomic_add_int(&chk->whoTo->ref_count, 1);
9053 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9054 chk->asoc->ctrl_queue_cnt++;
9058 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9060 /* formulate and queue a cookie-ack back to sender */
9061 struct mbuf *cookie_ack;
9062 struct sctp_chunkhdr *hdr;
9063 struct sctp_tmit_chunk *chk;
9066 SCTP_TCB_LOCK_ASSERT(stcb);
9068 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
9069 if (cookie_ack == NULL) {
9073 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9074 sctp_alloc_a_chunk(stcb, chk);
9077 sctp_m_freem(cookie_ack);
9080 chk->copy_by_ref = 0;
9081 chk->send_size = sizeof(struct sctp_chunkhdr);
9082 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9083 chk->rec.chunk_id.can_take_data = 1;
9084 chk->sent = SCTP_DATAGRAM_UNSENT;
9087 chk->asoc = &stcb->asoc;
9088 chk->data = cookie_ack;
9089 if (chk->asoc->last_control_chunk_from != NULL) {
9090 chk->whoTo = chk->asoc->last_control_chunk_from;
9091 atomic_add_int(&chk->whoTo->ref_count, 1);
9095 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9096 hdr->chunk_type = SCTP_COOKIE_ACK;
9097 hdr->chunk_flags = 0;
9098 hdr->chunk_length = htons(chk->send_size);
9099 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9100 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9101 chk->asoc->ctrl_queue_cnt++;
9107 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9109 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9110 struct mbuf *m_shutdown_ack;
9111 struct sctp_shutdown_ack_chunk *ack_cp;
9112 struct sctp_tmit_chunk *chk;
9114 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9115 if (m_shutdown_ack == NULL) {
9119 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9120 sctp_alloc_a_chunk(stcb, chk);
9123 sctp_m_freem(m_shutdown_ack);
9126 chk->copy_by_ref = 0;
9127 chk->send_size = sizeof(struct sctp_chunkhdr);
9128 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9129 chk->rec.chunk_id.can_take_data = 1;
9130 chk->sent = SCTP_DATAGRAM_UNSENT;
9133 chk->asoc = &stcb->asoc;
9134 chk->data = m_shutdown_ack;
9137 atomic_add_int(&chk->whoTo->ref_count, 1);
9139 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9140 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9141 ack_cp->ch.chunk_flags = 0;
9142 ack_cp->ch.chunk_length = htons(chk->send_size);
9143 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9144 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9145 chk->asoc->ctrl_queue_cnt++;
9150 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9152 /* formulate and queue a SHUTDOWN to the sender */
9153 struct mbuf *m_shutdown;
9154 struct sctp_shutdown_chunk *shutdown_cp;
9155 struct sctp_tmit_chunk *chk;
9157 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
9158 if (m_shutdown == NULL) {
9162 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9163 sctp_alloc_a_chunk(stcb, chk);
9166 sctp_m_freem(m_shutdown);
9169 chk->copy_by_ref = 0;
9170 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9171 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9172 chk->rec.chunk_id.can_take_data = 1;
9173 chk->sent = SCTP_DATAGRAM_UNSENT;
9176 chk->asoc = &stcb->asoc;
9177 chk->data = m_shutdown;
9180 atomic_add_int(&chk->whoTo->ref_count, 1);
9182 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9183 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9184 shutdown_cp->ch.chunk_flags = 0;
9185 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9186 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9187 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9188 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9189 chk->asoc->ctrl_queue_cnt++;
9194 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9197 * formulate and queue an ASCONF to the peer. ASCONF parameters
9198 * should be queued on the assoc queue.
9200 struct sctp_tmit_chunk *chk;
9201 struct mbuf *m_asconf;
9204 SCTP_TCB_LOCK_ASSERT(stcb);
9206 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9207 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9208 /* can't send a new one if there is one in flight already */
9211 /* compose an ASCONF chunk, maximum length is PMTU */
9212 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9213 if (m_asconf == NULL) {
9216 sctp_alloc_a_chunk(stcb, chk);
9219 sctp_m_freem(m_asconf);
9222 chk->copy_by_ref = 0;
9223 chk->data = m_asconf;
9224 chk->send_size = len;
9225 chk->rec.chunk_id.id = SCTP_ASCONF;
9226 chk->rec.chunk_id.can_take_data = 0;
9227 chk->sent = SCTP_DATAGRAM_UNSENT;
9229 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9230 chk->asoc = &stcb->asoc;
9233 atomic_add_int(&chk->whoTo->ref_count, 1);
9235 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9236 chk->asoc->ctrl_queue_cnt++;
9241 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9244 * formulate and queue a asconf-ack back to sender. the asconf-ack
9245 * must be stored in the tcb.
9247 struct sctp_tmit_chunk *chk;
9248 struct sctp_asconf_ack *ack, *latest_ack;
9250 struct sctp_nets *net = NULL;
9252 SCTP_TCB_LOCK_ASSERT(stcb);
9253 /* Get the latest ASCONF-ACK */
9254 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9255 if (latest_ack == NULL) {
9258 if (latest_ack->last_sent_to != NULL &&
9259 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9260 /* we're doing a retransmission */
9261 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9264 if (stcb->asoc.last_control_chunk_from == NULL) {
9265 if (stcb->asoc.alternate) {
9266 net = stcb->asoc.alternate;
9268 net = stcb->asoc.primary_destination;
9271 net = stcb->asoc.last_control_chunk_from;
9276 if (stcb->asoc.last_control_chunk_from == NULL) {
9277 if (stcb->asoc.alternate) {
9278 net = stcb->asoc.alternate;
9280 net = stcb->asoc.primary_destination;
9283 net = stcb->asoc.last_control_chunk_from;
9286 latest_ack->last_sent_to = net;
9288 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9289 if (ack->data == NULL) {
9292 /* copy the asconf_ack */
9293 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_DONTWAIT);
9294 if (m_ack == NULL) {
9295 /* couldn't copy it */
9298 #ifdef SCTP_MBUF_LOGGING
9299 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9302 for (mat = m_ack; mat; mat = SCTP_BUF_NEXT(mat)) {
9303 if (SCTP_BUF_IS_EXTENDED(mat)) {
9304 sctp_log_mb(mat, SCTP_MBUF_ICOPY);
9310 sctp_alloc_a_chunk(stcb, chk);
9314 sctp_m_freem(m_ack);
9317 chk->copy_by_ref = 0;
9321 atomic_add_int(&chk->whoTo->ref_count, 1);
9326 chk->send_size = ack->len;
9327 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9328 chk->rec.chunk_id.can_take_data = 1;
9329 chk->sent = SCTP_DATAGRAM_UNSENT;
9331 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; /* XXX */
9332 chk->asoc = &stcb->asoc;
9334 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9335 chk->asoc->ctrl_queue_cnt++;
9342 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9343 struct sctp_tcb *stcb,
9344 struct sctp_association *asoc,
9345 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9346 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9352 * send out one MTU of retransmission. If fast_retransmit is
9353 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9354 * rwnd. For a Cookie or Asconf in the control chunk queue we
9355 * retransmit them by themselves.
9357 * For data chunks we will pick out the lowest TSN's in the sent_queue
9358 * marked for resend and bundle them all together (up to a MTU of
9359 * destination). The address to send to should have been
9360 * selected/changed where the retransmission was marked (i.e. in FR
9361 * or t3-timeout routines).
9363 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9364 struct sctp_tmit_chunk *chk, *fwd;
9365 struct mbuf *m, *endofchain;
9366 struct sctp_nets *net = NULL;
9367 uint32_t tsns_sent = 0;
9368 int no_fragmentflg, bundle_at, cnt_thru;
9370 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9371 struct sctp_auth_chunk *auth = NULL;
9372 uint32_t auth_offset = 0;
9373 uint16_t auth_keyid;
9374 int override_ok = 1;
9375 int data_auth_reqd = 0;
9378 SCTP_TCB_LOCK_ASSERT(stcb);
9379 tmr_started = ctl_cnt = bundle_at = error = 0;
9384 endofchain = m = NULL;
9385 auth_keyid = stcb->asoc.authinfo.active_keyid;
9386 #ifdef SCTP_AUDITING_ENABLED
9387 sctp_audit_log(0xC3, 1);
9389 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9390 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9391 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9392 asoc->sent_queue_retran_cnt);
9393 asoc->sent_queue_cnt = 0;
9394 asoc->sent_queue_cnt_removeable = 0;
9395 /* send back 0/0 so we enter normal transmission */
9399 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9400 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9401 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9402 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9403 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9406 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9407 if (chk != asoc->str_reset) {
9409 * not eligible for retran if its
9416 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9420 * Add an AUTH chunk, if chunk requires it save the
9421 * offset into the chain for AUTH
9423 if ((auth == NULL) &&
9424 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9425 stcb->asoc.peer_auth_chunks))) {
9426 m = sctp_add_auth_chunk(m, &endofchain,
9427 &auth, &auth_offset,
9429 chk->rec.chunk_id.id);
9430 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9432 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9438 /* do we have control chunks to retransmit? */
9440 /* Start a timer no matter if we suceed or fail */
9441 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9442 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9443 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9444 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9445 chk->snd_count++; /* update our count */
9446 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9447 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9448 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9449 no_fragmentflg, 0, 0,
9450 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9451 chk->whoTo->port, so_locked, NULL, NULL))) {
9452 SCTP_STAT_INCR(sctps_lowlevelerr);
9459 * We don't want to mark the net->sent time here since this
9460 * we use this for HB and retrans cannot measure RTT
9462 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9464 chk->sent = SCTP_DATAGRAM_SENT;
9465 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9469 /* Clean up the fwd-tsn list */
9470 sctp_clean_up_ctl(stcb, asoc, so_locked);
9475 * Ok, it is just data retransmission we need to do or that and a
9476 * fwd-tsn with it all.
9478 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9479 return (SCTP_RETRAN_DONE);
9481 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9482 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9483 /* not yet open, resend the cookie and that is it */
9486 #ifdef SCTP_AUDITING_ENABLED
9487 sctp_auditing(20, inp, stcb, NULL);
9489 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9490 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9491 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9492 /* No, not sent to this net or not ready for rtx */
9495 if (chk->data == NULL) {
9496 printf("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9497 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9500 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9501 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9502 /* Gak, we have exceeded max unlucky retran, abort! */
9503 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9505 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9506 atomic_add_int(&stcb->asoc.refcnt, 1);
9507 sctp_abort_an_association(stcb->sctp_ep, stcb, 0, NULL, so_locked);
9508 SCTP_TCB_LOCK(stcb);
9509 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9510 return (SCTP_RETRAN_EXIT);
9512 /* pick up the net */
9514 switch (net->ro._l_addr.sa.sa_family) {
9517 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9522 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9531 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9532 /* No room in peers rwnd */
9535 tsn = asoc->last_acked_seq + 1;
9536 if (tsn == chk->rec.data.TSN_seq) {
9538 * we make a special exception for this
9539 * case. The peer has no rwnd but is missing
9540 * the lowest chunk.. which is probably what
9541 * is holding up the rwnd.
9543 goto one_chunk_around;
9548 if (asoc->peers_rwnd < mtu) {
9550 if ((asoc->peers_rwnd == 0) &&
9551 (asoc->total_flight == 0)) {
9552 chk->window_probe = 1;
9553 chk->whoTo->window_probe = 1;
9556 #ifdef SCTP_AUDITING_ENABLED
9557 sctp_audit_log(0xC3, 2);
9561 net->fast_retran_ip = 0;
9562 if (chk->rec.data.doing_fast_retransmit == 0) {
9564 * if no FR in progress skip destination that have
9565 * flight_size > cwnd.
9567 if (net->flight_size >= net->cwnd) {
9572 * Mark the destination net to have FR recovery
9576 net->fast_retran_ip = 1;
9580 * if no AUTH is yet included and this chunk requires it,
9581 * make sure to account for it. We don't apply the size
9582 * until the AUTH chunk is actually added below in case
9583 * there is no room for this chunk.
9585 if (data_auth_reqd && (auth == NULL)) {
9586 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9590 if ((chk->send_size <= (mtu - dmtu)) ||
9591 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9592 /* ok we will add this one */
9593 if (data_auth_reqd) {
9595 m = sctp_add_auth_chunk(m,
9601 auth_keyid = chk->auth_keyid;
9603 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9604 } else if (override_ok) {
9605 auth_keyid = chk->auth_keyid;
9607 } else if (chk->auth_keyid != auth_keyid) {
9608 /* different keyid, so done bundling */
9612 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9614 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9617 /* Do clear IP_DF ? */
9618 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9621 /* upate our MTU size */
9622 if (mtu > (chk->send_size + dmtu))
9623 mtu -= (chk->send_size + dmtu);
9626 data_list[bundle_at++] = chk;
9627 if (one_chunk && (asoc->total_flight <= 0)) {
9628 SCTP_STAT_INCR(sctps_windowprobed);
9631 if (one_chunk == 0) {
9633 * now are there anymore forward from chk to pick
9636 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9637 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9638 /* Nope, not for retran */
9641 if (fwd->whoTo != net) {
9642 /* Nope, not the net in question */
9645 if (data_auth_reqd && (auth == NULL)) {
9646 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9649 if (fwd->send_size <= (mtu - dmtu)) {
9650 if (data_auth_reqd) {
9652 m = sctp_add_auth_chunk(m,
9658 auth_keyid = fwd->auth_keyid;
9660 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9661 } else if (override_ok) {
9662 auth_keyid = fwd->auth_keyid;
9664 } else if (fwd->auth_keyid != auth_keyid) {
9672 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9674 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9677 /* Do clear IP_DF ? */
9678 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9681 /* upate our MTU size */
9682 if (mtu > (fwd->send_size + dmtu))
9683 mtu -= (fwd->send_size + dmtu);
9686 data_list[bundle_at++] = fwd;
9687 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9691 /* can't fit so we are done */
9696 /* Is there something to send for this destination? */
9699 * No matter if we fail/or suceed we should start a
9700 * timer. A failure is like a lost IP packet :-)
9702 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9704 * no timer running on this destination
9707 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9710 /* Now lets send it, if there is anything to send :> */
9711 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9712 (struct sockaddr *)&net->ro._l_addr, m,
9713 auth_offset, auth, auth_keyid,
9714 no_fragmentflg, 0, 0,
9715 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9716 net->port, so_locked, NULL, NULL))) {
9717 /* error, we could not output */
9718 SCTP_STAT_INCR(sctps_lowlevelerr);
9726 * We don't want to mark the net->sent time here
9727 * since this we use this for HB and retrans cannot
9730 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9732 /* For auto-close */
9734 if (*now_filled == 0) {
9735 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9736 *now = asoc->time_last_sent;
9739 asoc->time_last_sent = *now;
9741 *cnt_out += bundle_at;
9742 #ifdef SCTP_AUDITING_ENABLED
9743 sctp_audit_log(0xC4, bundle_at);
9746 tsns_sent = data_list[0]->rec.data.TSN_seq;
9748 for (i = 0; i < bundle_at; i++) {
9749 SCTP_STAT_INCR(sctps_sendretransdata);
9750 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9752 * When we have a revoked data, and we
9753 * retransmit it, then we clear the revoked
9754 * flag since this flag dictates if we
9755 * subtracted from the fs
9757 if (data_list[i]->rec.data.chunk_was_revoked) {
9758 /* Deflate the cwnd */
9759 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9760 data_list[i]->rec.data.chunk_was_revoked = 0;
9762 data_list[i]->snd_count++;
9763 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9764 /* record the time */
9765 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9766 if (data_list[i]->book_size_scale) {
9768 * need to double the book size on
9771 data_list[i]->book_size_scale = 0;
9773 * Since we double the booksize, we
9774 * must also double the output queue
9775 * size, since this get shrunk when
9776 * we free by this amount.
9778 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9779 data_list[i]->book_size *= 2;
9783 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9784 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9785 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9787 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9788 (uint32_t) (data_list[i]->send_size +
9789 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9791 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9792 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9793 data_list[i]->whoTo->flight_size,
9794 data_list[i]->book_size,
9795 (uintptr_t) data_list[i]->whoTo,
9796 data_list[i]->rec.data.TSN_seq);
9798 sctp_flight_size_increase(data_list[i]);
9799 sctp_total_flight_increase(stcb, data_list[i]);
9800 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9801 /* SWS sender side engages */
9802 asoc->peers_rwnd = 0;
9805 (data_list[i]->rec.data.doing_fast_retransmit)) {
9806 SCTP_STAT_INCR(sctps_sendfastretrans);
9807 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9808 (tmr_started == 0)) {
9810 * ok we just fast-retrans'd
9811 * the lowest TSN, i.e the
9812 * first on the list. In
9813 * this case we want to give
9814 * some more time to get a
9815 * SACK back without a
9818 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9819 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
9820 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9824 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9825 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9827 #ifdef SCTP_AUDITING_ENABLED
9828 sctp_auditing(21, inp, stcb, NULL);
9834 if (asoc->sent_queue_retran_cnt <= 0) {
9835 /* all done we have no more to retran */
9836 asoc->sent_queue_retran_cnt = 0;
9840 /* No more room in rwnd */
9843 /* stop the for loop here. we sent out a packet */
9850 sctp_timer_validation(struct sctp_inpcb *inp,
9851 struct sctp_tcb *stcb,
9852 struct sctp_association *asoc)
9854 struct sctp_nets *net;
9856 /* Validate that a timer is running somewhere */
9857 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9858 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9859 /* Here is a timer */
9863 SCTP_TCB_LOCK_ASSERT(stcb);
9864 /* Gak, we did not have a timer somewhere */
9865 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9866 if (asoc->alternate) {
9867 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9869 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9875 sctp_chunk_output(struct sctp_inpcb *inp,
9876 struct sctp_tcb *stcb,
9879 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9885 * Ok this is the generic chunk service queue. we must do the
9887 * - See if there are retransmits pending, if so we must
9889 * - Service the stream queue that is next, moving any
9890 * message (note I must get a complete message i.e.
9891 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9893 * - Check to see if the cwnd/rwnd allows any output, if so we
9894 * go ahead and fomulate and send the low level chunks. Making sure
9895 * to combine any control in the control chunk queue also.
9897 struct sctp_association *asoc;
9898 struct sctp_nets *net;
9899 int error = 0, num_out = 0, tot_out = 0, ret = 0, reason_code = 0;
9900 unsigned int burst_cnt = 0;
9904 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9907 unsigned int tot_frs = 0;
9910 /* The Nagle algorithm is only applied when handling a send call. */
9911 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9912 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9920 SCTP_TCB_LOCK_ASSERT(stcb);
9922 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9924 if ((un_sent <= 0) &&
9925 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9926 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9927 (asoc->sent_queue_retran_cnt == 0)) {
9928 /* Nothing to do unless there is something to be sent left */
9932 * Do we have something to send, data or control AND a sack timer
9933 * running, if so piggy-back the sack.
9935 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9936 sctp_send_sack(stcb, so_locked);
9937 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9939 while (asoc->sent_queue_retran_cnt) {
9941 * Ok, it is retransmission time only, we send out only ONE
9942 * packet with a single call off to the retran code.
9944 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9946 * Special hook for handling cookiess discarded
9947 * by peer that carried data. Send cookie-ack only
9948 * and then the next call with get the retran's.
9950 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9952 &now, &now_filled, frag_point, so_locked);
9954 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9955 /* if its not from a HB then do it */
9957 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9963 * its from any other place, we don't allow retran
9964 * output (only control)
9969 /* Can't send anymore */
9971 * now lets push out control by calling med-level
9972 * output once. this assures that we WILL send HB's
9975 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9977 &now, &now_filled, frag_point, so_locked);
9978 #ifdef SCTP_AUDITING_ENABLED
9979 sctp_auditing(8, inp, stcb, NULL);
9981 sctp_timer_validation(inp, stcb, asoc);
9986 * The count was off.. retran is not happening so do
9987 * the normal retransmission.
9989 #ifdef SCTP_AUDITING_ENABLED
9990 sctp_auditing(9, inp, stcb, NULL);
9992 if (ret == SCTP_RETRAN_EXIT) {
9997 if (from_where == SCTP_OUTPUT_FROM_T3) {
9998 /* Only one transmission allowed out of a timeout */
9999 #ifdef SCTP_AUDITING_ENABLED
10000 sctp_auditing(10, inp, stcb, NULL);
10002 /* Push out any control */
10003 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
10004 &now, &now_filled, frag_point, so_locked);
10007 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
10008 /* Hit FR burst limit */
10011 if ((num_out == 0) && (ret == 0)) {
10012 /* No more retrans to send */
10016 #ifdef SCTP_AUDITING_ENABLED
10017 sctp_auditing(12, inp, stcb, NULL);
10019 /* Check for bad destinations, if they exist move chunks around. */
10020 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
10021 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
10023 * if possible move things off of this address we
10024 * still may send below due to the dormant state but
10025 * we try to find an alternate address to send to
10026 * and if we have one we move all queued data on the
10027 * out wheel to this alternate address.
10029 if (net->ref_count > 1)
10030 sctp_move_chunks_from_net(stcb, net);
10033 * if ((asoc->sat_network) || (net->addr_is_local))
10034 * { burst_limit = asoc->max_burst *
10035 * SCTP_SAT_NETWORK_BURST_INCR; }
10037 if (asoc->max_burst > 0) {
10038 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
10039 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
10041 * JRS - Use the congestion
10042 * control given in the
10043 * congestion control module
10045 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
10046 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10047 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
10049 SCTP_STAT_INCR(sctps_maxburstqueued);
10051 net->fast_retran_ip = 0;
10053 if (net->flight_size == 0) {
10055 * Should be decaying the
10067 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10068 &reason_code, 0, from_where,
10069 &now, &now_filled, frag_point, so_locked);
10071 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10072 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10073 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10075 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10076 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10077 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10081 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10083 tot_out += num_out;
10085 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10086 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10087 if (num_out == 0) {
10088 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10093 * When the Nagle algorithm is used, look at how
10094 * much is unsent, then if its smaller than an MTU
10095 * and we have data in flight we stop, except if we
10096 * are handling a fragmented user message.
10098 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10099 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10100 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10101 (stcb->asoc.total_flight > 0) &&
10102 ((stcb->asoc.locked_on_sending == NULL) ||
10103 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10107 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10108 TAILQ_EMPTY(&asoc->send_queue) &&
10109 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10110 /* Nothing left to send */
10113 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10114 /* Nothing left to send */
10117 } while (num_out &&
10118 ((asoc->max_burst == 0) ||
10119 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10120 (burst_cnt < asoc->max_burst)));
10122 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10123 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10124 SCTP_STAT_INCR(sctps_maxburstqueued);
10125 asoc->burst_limit_applied = 1;
10126 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10127 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10130 asoc->burst_limit_applied = 0;
10133 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10134 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10136 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10140 * Now we need to clean up the control chunk chain if a ECNE is on
10141 * it. It must be marked as UNSENT again so next call will continue
10142 * to send it until such time that we get a CWR, to remove it.
10144 if (stcb->asoc.ecn_echo_cnt_onq)
10145 sctp_fix_ecn_echo(asoc);
10152 struct sctp_inpcb *inp,
10154 struct sockaddr *addr,
10155 struct mbuf *control,
10160 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10163 if (inp->sctp_socket == NULL) {
10164 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10167 return (sctp_sosend(inp->sctp_socket,
10169 (struct uio *)NULL,
10177 send_forward_tsn(struct sctp_tcb *stcb,
10178 struct sctp_association *asoc)
10180 struct sctp_tmit_chunk *chk;
10181 struct sctp_forward_tsn_chunk *fwdtsn;
10182 uint32_t advance_peer_ack_point;
10184 SCTP_TCB_LOCK_ASSERT(stcb);
10185 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10186 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10187 /* mark it to unsent */
10188 chk->sent = SCTP_DATAGRAM_UNSENT;
10189 chk->snd_count = 0;
10190 /* Do we correct its output location? */
10192 sctp_free_remote_addr(chk->whoTo);
10195 goto sctp_fill_in_rest;
10198 /* Ok if we reach here we must build one */
10199 sctp_alloc_a_chunk(stcb, chk);
10203 asoc->fwd_tsn_cnt++;
10204 chk->copy_by_ref = 0;
10205 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10206 chk->rec.chunk_id.can_take_data = 0;
10209 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
10210 if (chk->data == NULL) {
10211 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10214 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10215 chk->sent = SCTP_DATAGRAM_UNSENT;
10216 chk->snd_count = 0;
10217 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10218 asoc->ctrl_queue_cnt++;
10221 * Here we go through and fill out the part that deals with
10222 * stream/seq of the ones we skip.
10224 SCTP_BUF_LEN(chk->data) = 0;
10226 struct sctp_tmit_chunk *at, *tp1, *last;
10227 struct sctp_strseq *strseq;
10228 unsigned int cnt_of_space, i, ovh;
10229 unsigned int space_needed;
10230 unsigned int cnt_of_skipped = 0;
10232 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10233 if (at->sent != SCTP_FORWARD_TSN_SKIP) {
10234 /* no more to look at */
10237 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10238 /* We don't report these */
10243 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10244 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10246 cnt_of_space = M_TRAILINGSPACE(chk->data);
10248 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10249 ovh = SCTP_MIN_OVERHEAD;
10251 ovh = SCTP_MIN_V4_OVERHEAD;
10253 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10254 /* trim to a mtu size */
10255 cnt_of_space = asoc->smallest_mtu - ovh;
10257 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10258 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10259 0xff, 0, cnt_of_skipped,
10260 asoc->advanced_peer_ack_point);
10263 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10264 if (cnt_of_space < space_needed) {
10266 * ok we must trim down the chunk by lowering the
10267 * advance peer ack point.
10269 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10270 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10271 0xff, 0xff, cnt_of_space,
10274 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10275 cnt_of_skipped /= sizeof(struct sctp_strseq);
10277 * Go through and find the TSN that will be the one
10280 at = TAILQ_FIRST(&asoc->sent_queue);
10282 for (i = 0; i < cnt_of_skipped; i++) {
10283 tp1 = TAILQ_NEXT(at, sctp_next);
10290 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10291 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10292 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10293 asoc->advanced_peer_ack_point);
10297 * last now points to last one I can report, update
10301 advance_peer_ack_point = last->rec.data.TSN_seq;
10302 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10303 cnt_of_skipped * sizeof(struct sctp_strseq);
10305 chk->send_size = space_needed;
10306 /* Setup the chunk */
10307 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10308 fwdtsn->ch.chunk_length = htons(chk->send_size);
10309 fwdtsn->ch.chunk_flags = 0;
10310 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10311 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10312 SCTP_BUF_LEN(chk->data) = chk->send_size;
10315 * Move pointer to after the fwdtsn and transfer to the
10318 strseq = (struct sctp_strseq *)fwdtsn;
10320 * Now populate the strseq list. This is done blindly
10321 * without pulling out duplicate stream info. This is
10322 * inefficent but won't harm the process since the peer will
10323 * look at these in sequence and will thus release anything.
10324 * It could mean we exceed the PMTU and chop off some that
10325 * we could have included.. but this is unlikely (aka 1432/4
10326 * would mean 300+ stream seq's would have to be reported in
10327 * one FWD-TSN. With a bit of work we can later FIX this to
10328 * optimize and pull out duplcates.. but it does add more
10329 * overhead. So for now... not!
10331 at = TAILQ_FIRST(&asoc->sent_queue);
10332 for (i = 0; i < cnt_of_skipped; i++) {
10333 tp1 = TAILQ_NEXT(at, sctp_next);
10336 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10337 /* We don't report these */
10342 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10343 at->rec.data.fwd_tsn_cnt = 0;
10345 strseq->stream = ntohs(at->rec.data.stream_number);
10346 strseq->sequence = ntohs(at->rec.data.stream_seq);
10355 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10356 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10362 * Queue up a SACK or NR-SACK in the control queue.
10363 * We must first check to see if a SACK or NR-SACK is
10364 * somehow on the control queue.
10365 * If so, we will take and and remove the old one.
10367 struct sctp_association *asoc;
10368 struct sctp_tmit_chunk *chk, *a_chk;
10369 struct sctp_sack_chunk *sack;
10370 struct sctp_nr_sack_chunk *nr_sack;
10371 struct sctp_gap_ack_block *gap_descriptor;
10372 struct sack_track *selector;
10377 int limit_reached = 0;
10378 unsigned int i, siz, j;
10379 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10382 uint32_t highest_tsn;
10387 if ((stcb->asoc.sctp_nr_sack_on_off == 1) &&
10388 (stcb->asoc.peer_supports_nr_sack == 1)) {
10389 type = SCTP_NR_SELECTIVE_ACK;
10391 type = SCTP_SELECTIVE_ACK;
10394 asoc = &stcb->asoc;
10395 SCTP_TCB_LOCK_ASSERT(stcb);
10396 if (asoc->last_data_chunk_from == NULL) {
10397 /* Hmm we never received anything */
10400 sctp_slide_mapping_arrays(stcb);
10401 sctp_set_rwnd(stcb, asoc);
10402 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10403 if (chk->rec.chunk_id.id == type) {
10404 /* Hmm, found a sack already on queue, remove it */
10405 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10406 asoc->ctrl_queue_cnt--;
10409 sctp_m_freem(a_chk->data);
10410 a_chk->data = NULL;
10412 if (a_chk->whoTo) {
10413 sctp_free_remote_addr(a_chk->whoTo);
10414 a_chk->whoTo = NULL;
10419 if (a_chk == NULL) {
10420 sctp_alloc_a_chunk(stcb, a_chk);
10421 if (a_chk == NULL) {
10422 /* No memory so we drop the idea, and set a timer */
10423 if (stcb->asoc.delayed_ack) {
10424 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10425 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
10426 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10427 stcb->sctp_ep, stcb, NULL);
10429 stcb->asoc.send_sack = 1;
10433 a_chk->copy_by_ref = 0;
10434 a_chk->rec.chunk_id.id = type;
10435 a_chk->rec.chunk_id.can_take_data = 1;
10437 /* Clear our pkt counts */
10438 asoc->data_pkts_seen = 0;
10440 a_chk->asoc = asoc;
10441 a_chk->snd_count = 0;
10442 a_chk->send_size = 0; /* fill in later */
10443 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10444 a_chk->whoTo = NULL;
10446 if ((asoc->numduptsns) ||
10447 (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE))) {
10449 * Ok, we have some duplicates or the destination for the
10450 * sack is unreachable, lets see if we can select an
10451 * alternate than asoc->last_data_chunk_from
10453 if ((asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE) &&
10454 (asoc->used_alt_onsack > asoc->numnets)) {
10455 /* We used an alt last time, don't this time */
10456 a_chk->whoTo = NULL;
10458 asoc->used_alt_onsack++;
10459 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10461 if (a_chk->whoTo == NULL) {
10462 /* Nope, no alternate */
10463 a_chk->whoTo = asoc->last_data_chunk_from;
10464 asoc->used_alt_onsack = 0;
10468 * No duplicates so we use the last place we received data
10471 asoc->used_alt_onsack = 0;
10472 a_chk->whoTo = asoc->last_data_chunk_from;
10474 if (a_chk->whoTo) {
10475 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10477 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10478 highest_tsn = asoc->highest_tsn_inside_map;
10480 highest_tsn = asoc->highest_tsn_inside_nr_map;
10482 if (highest_tsn == asoc->cumulative_tsn) {
10484 if (type == SCTP_SELECTIVE_ACK) {
10485 space_req = sizeof(struct sctp_sack_chunk);
10487 space_req = sizeof(struct sctp_nr_sack_chunk);
10490 /* gaps get a cluster */
10491 space_req = MCLBYTES;
10493 /* Ok now lets formulate a MBUF with our sack */
10494 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_DONTWAIT, 1, MT_DATA);
10495 if ((a_chk->data == NULL) ||
10496 (a_chk->whoTo == NULL)) {
10497 /* rats, no mbuf memory */
10499 /* was a problem with the destination */
10500 sctp_m_freem(a_chk->data);
10501 a_chk->data = NULL;
10503 sctp_free_a_chunk(stcb, a_chk, so_locked);
10504 /* sa_ignore NO_NULL_CHK */
10505 if (stcb->asoc.delayed_ack) {
10506 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10507 stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_6);
10508 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10509 stcb->sctp_ep, stcb, NULL);
10511 stcb->asoc.send_sack = 1;
10515 /* ok, lets go through and fill it in */
10516 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10517 space = M_TRAILINGSPACE(a_chk->data);
10518 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10519 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10521 limit = mtod(a_chk->data, caddr_t);
10526 if ((asoc->sctp_cmt_on_off > 0) &&
10527 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10529 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10530 * received, then set high bit to 1, else 0. Reset
10533 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10534 asoc->cmt_dac_pkts_rcvd = 0;
10536 #ifdef SCTP_ASOCLOG_OF_TSNS
10537 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10538 stcb->asoc.cumack_log_atsnt++;
10539 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10540 stcb->asoc.cumack_log_atsnt = 0;
10543 /* reset the readers interpretation */
10544 stcb->freed_by_sorcv_sincelast = 0;
10546 if (type == SCTP_SELECTIVE_ACK) {
10547 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10549 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10550 if (highest_tsn > asoc->mapping_array_base_tsn) {
10551 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10553 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10557 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10558 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10559 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10560 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10562 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10566 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10569 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10571 if (((type == SCTP_SELECTIVE_ACK) &&
10572 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10573 ((type == SCTP_NR_SELECTIVE_ACK) &&
10574 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10575 /* we have a gap .. maybe */
10576 for (i = 0; i < siz; i++) {
10577 tsn_map = asoc->mapping_array[i];
10578 if (type == SCTP_SELECTIVE_ACK) {
10579 tsn_map |= asoc->nr_mapping_array[i];
10583 * Clear all bits corresponding to TSNs
10584 * smaller or equal to the cumulative TSN.
10586 tsn_map &= (~0 << (1 - offset));
10588 selector = &sack_array[tsn_map];
10589 if (mergeable && selector->right_edge) {
10591 * Backup, left and right edges were ok to
10597 if (selector->num_entries == 0)
10600 for (j = 0; j < selector->num_entries; j++) {
10601 if (mergeable && selector->right_edge) {
10603 * do a merge by NOT setting
10609 * no merge, set the left
10613 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10615 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10618 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10624 if (selector->left_edge) {
10628 if (limit_reached) {
10629 /* Reached the limit stop */
10635 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10636 (limit_reached == 0)) {
10640 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10641 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10643 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10646 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10649 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10651 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10652 /* we have a gap .. maybe */
10653 for (i = 0; i < siz; i++) {
10654 tsn_map = asoc->nr_mapping_array[i];
10657 * Clear all bits corresponding to
10658 * TSNs smaller or equal to the
10661 tsn_map &= (~0 << (1 - offset));
10663 selector = &sack_array[tsn_map];
10664 if (mergeable && selector->right_edge) {
10666 * Backup, left and right edges were
10669 num_nr_gap_blocks--;
10672 if (selector->num_entries == 0)
10675 for (j = 0; j < selector->num_entries; j++) {
10676 if (mergeable && selector->right_edge) {
10678 * do a merge by NOT
10685 * no merge, set the
10689 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10691 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10692 num_nr_gap_blocks++;
10694 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10700 if (selector->left_edge) {
10704 if (limit_reached) {
10705 /* Reached the limit stop */
10712 /* now we must add any dups we are going to report. */
10713 if ((limit_reached == 0) && (asoc->numduptsns)) {
10714 dup = (uint32_t *) gap_descriptor;
10715 for (i = 0; i < asoc->numduptsns; i++) {
10716 *dup = htonl(asoc->dup_tsns[i]);
10719 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10724 asoc->numduptsns = 0;
10727 * now that the chunk is prepared queue it to the control chunk
10730 if (type == SCTP_SELECTIVE_ACK) {
10731 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10732 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10733 num_dups * sizeof(int32_t);
10734 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10735 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10736 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10737 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10738 sack->sack.num_dup_tsns = htons(num_dups);
10739 sack->ch.chunk_type = type;
10740 sack->ch.chunk_flags = flags;
10741 sack->ch.chunk_length = htons(a_chk->send_size);
10743 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10744 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10745 num_dups * sizeof(int32_t);
10746 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10747 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10748 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10749 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10750 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10751 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10752 nr_sack->nr_sack.reserved = 0;
10753 nr_sack->ch.chunk_type = type;
10754 nr_sack->ch.chunk_flags = flags;
10755 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10757 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10758 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10759 asoc->ctrl_queue_cnt++;
10760 asoc->send_sack = 0;
10761 SCTP_STAT_INCR(sctps_sendsacks);
10766 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10767 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10772 struct mbuf *m_abort;
10773 struct mbuf *m_out = NULL, *m_end = NULL;
10774 struct sctp_abort_chunk *abort = NULL;
10776 uint32_t auth_offset = 0;
10777 struct sctp_auth_chunk *auth = NULL;
10778 struct sctp_nets *net;
10781 * Add an AUTH chunk, if chunk requires it and save the offset into
10782 * the chain for AUTH
10784 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10785 stcb->asoc.peer_auth_chunks)) {
10786 m_out = sctp_add_auth_chunk(m_out, &m_end, &auth, &auth_offset,
10787 stcb, SCTP_ABORT_ASSOCIATION);
10788 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10790 SCTP_TCB_LOCK_ASSERT(stcb);
10791 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_DONTWAIT, 1, MT_HEADER);
10792 if (m_abort == NULL) {
10795 sctp_m_freem(m_out);
10798 /* link in any error */
10799 SCTP_BUF_NEXT(m_abort) = operr;
10806 sz += SCTP_BUF_LEN(n);
10807 n = SCTP_BUF_NEXT(n);
10810 SCTP_BUF_LEN(m_abort) = sizeof(*abort);
10811 if (m_out == NULL) {
10812 /* NO Auth chunk prepended, so reserve space in front */
10813 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10816 /* Put AUTH chunk at the front of the chain */
10817 SCTP_BUF_NEXT(m_end) = m_abort;
10819 if (stcb->asoc.alternate) {
10820 net = stcb->asoc.alternate;
10822 net = stcb->asoc.primary_destination;
10824 /* fill in the ABORT chunk */
10825 abort = mtod(m_abort, struct sctp_abort_chunk *);
10826 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10827 abort->ch.chunk_flags = 0;
10828 abort->ch.chunk_length = htons(sizeof(*abort) + sz);
10830 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10831 (struct sockaddr *)&net->ro._l_addr,
10832 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10833 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
10834 stcb->asoc.primary_destination->port, so_locked, NULL, NULL);
10835 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10839 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10840 struct sctp_nets *net,
10843 /* formulate and SEND a SHUTDOWN-COMPLETE */
10844 struct mbuf *m_shutdown_comp;
10845 struct sctp_shutdown_complete_chunk *shutdown_complete;
10849 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_DONTWAIT, 1, MT_HEADER);
10850 if (m_shutdown_comp == NULL) {
10854 if (reflect_vtag) {
10855 flags = SCTP_HAD_NO_TCB;
10856 vtag = stcb->asoc.my_vtag;
10859 vtag = stcb->asoc.peer_vtag;
10861 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10862 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10863 shutdown_complete->ch.chunk_flags = flags;
10864 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10865 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10866 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10867 (struct sockaddr *)&net->ro._l_addr,
10868 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10869 stcb->sctp_ep->sctp_lport, stcb->rport,
10871 net->port, SCTP_SO_NOT_LOCKED, NULL, NULL);
10872 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10877 sctp_send_shutdown_complete2(struct mbuf *m, struct sctphdr *sh,
10878 uint32_t vrf_id, uint16_t port)
10880 /* formulate and SEND a SHUTDOWN-COMPLETE */
10881 struct mbuf *o_pak;
10884 struct udphdr *udp = NULL;
10885 int offset_out, len, mlen;
10886 struct sctp_shutdown_complete_msg *comp_cp;
10889 struct ip *iph_out;
10893 struct ip6_hdr *ip6, *ip6_out;
10897 iph = mtod(m, struct ip *);
10898 switch (iph->ip_v) {
10901 len = (sizeof(struct ip) + sizeof(struct sctp_shutdown_complete_msg));
10905 case IPV6_VERSION >> 4:
10906 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_shutdown_complete_msg));
10913 len += sizeof(struct udphdr);
10915 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
10916 if (mout == NULL) {
10919 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10920 SCTP_BUF_LEN(mout) = len;
10921 SCTP_BUF_NEXT(mout) = NULL;
10922 if (m->m_flags & M_FLOWID) {
10923 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
10924 mout->m_flags |= M_FLOWID;
10934 switch (iph->ip_v) {
10937 iph_out = mtod(mout, struct ip *);
10939 /* Fill in the IP header for the ABORT */
10940 iph_out->ip_v = IPVERSION;
10941 iph_out->ip_hl = (sizeof(struct ip) / 4);
10942 iph_out->ip_tos = (u_char)0;
10943 iph_out->ip_id = 0;
10944 iph_out->ip_off = 0;
10945 iph_out->ip_ttl = MAXTTL;
10947 iph_out->ip_p = IPPROTO_UDP;
10949 iph_out->ip_p = IPPROTO_SCTP;
10951 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
10952 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
10954 /* let IP layer calculate this */
10955 iph_out->ip_sum = 0;
10956 offset_out += sizeof(*iph_out);
10957 comp_cp = (struct sctp_shutdown_complete_msg *)(
10958 (caddr_t)iph_out + offset_out);
10962 case IPV6_VERSION >> 4:
10963 ip6 = (struct ip6_hdr *)iph;
10964 ip6_out = mtod(mout, struct ip6_hdr *);
10966 /* Fill in the IPv6 header for the ABORT */
10967 ip6_out->ip6_flow = ip6->ip6_flow;
10968 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10970 ip6_out->ip6_nxt = IPPROTO_UDP;
10972 ip6_out->ip6_nxt = IPPROTO_SCTP;
10974 ip6_out->ip6_src = ip6->ip6_dst;
10975 ip6_out->ip6_dst = ip6->ip6_src;
10977 * ?? The old code had both the iph len + payload, I think
10978 * this is wrong and would never have worked
10980 ip6_out->ip6_plen = sizeof(struct sctp_shutdown_complete_msg);
10981 offset_out += sizeof(*ip6_out);
10982 comp_cp = (struct sctp_shutdown_complete_msg *)(
10983 (caddr_t)ip6_out + offset_out);
10987 /* Currently not supported. */
10988 sctp_m_freem(mout);
10992 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10993 sctp_m_freem(mout);
10996 udp = (struct udphdr *)comp_cp;
10997 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10998 udp->uh_dport = port;
10999 udp->uh_ulen = htons(sizeof(struct sctp_shutdown_complete_msg) + sizeof(struct udphdr));
11003 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11009 offset_out += sizeof(struct udphdr);
11010 comp_cp = (struct sctp_shutdown_complete_msg *)((caddr_t)comp_cp + sizeof(struct udphdr));
11012 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11014 sctp_m_freem(mout);
11017 /* Now copy in and fill in the ABORT tags etc. */
11018 comp_cp->sh.src_port = sh->dest_port;
11019 comp_cp->sh.dest_port = sh->src_port;
11020 comp_cp->sh.checksum = 0;
11021 comp_cp->sh.v_tag = sh->v_tag;
11022 comp_cp->shut_cmp.ch.chunk_flags = SCTP_HAD_NO_TCB;
11023 comp_cp->shut_cmp.ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
11024 comp_cp->shut_cmp.ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
11027 if (iph_out != NULL) {
11031 mlen = SCTP_BUF_LEN(mout);
11032 bzero(&ro, sizeof ro);
11033 /* set IPv4 length */
11034 iph_out->ip_len = mlen;
11035 #ifdef SCTP_PACKET_LOGGING
11036 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11037 sctp_packet_log(mout, mlen);
11040 #if defined(SCTP_WITH_NO_CSUM)
11041 SCTP_STAT_INCR(sctps_sendnocrc);
11043 comp_cp->sh.checksum = sctp_calculate_cksum(mout, offset_out);
11044 SCTP_STAT_INCR(sctps_sendswcrc);
11047 SCTP_ENABLE_UDP_CSUM(mout);
11050 #if defined(SCTP_WITH_NO_CSUM)
11051 SCTP_STAT_INCR(sctps_sendnocrc);
11053 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11054 mout->m_pkthdr.csum_data = 0;
11055 SCTP_STAT_INCR(sctps_sendhwcrc);
11058 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11060 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
11062 /* Free the route if we got one back */
11068 if (ip6_out != NULL) {
11069 struct route_in6 ro;
11071 struct ifnet *ifp = NULL;
11073 bzero(&ro, sizeof(ro));
11074 mlen = SCTP_BUF_LEN(mout);
11075 #ifdef SCTP_PACKET_LOGGING
11076 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
11077 sctp_packet_log(mout, mlen);
11079 SCTP_ATTACH_CHAIN(o_pak, mout, mlen);
11081 #if defined(SCTP_WITH_NO_CSUM)
11082 SCTP_STAT_INCR(sctps_sendnocrc);
11084 comp_cp->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11085 SCTP_STAT_INCR(sctps_sendswcrc);
11087 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), mlen - sizeof(struct ip6_hdr))) == 0) {
11088 udp->uh_sum = 0xffff;
11091 #if defined(SCTP_WITH_NO_CSUM)
11092 SCTP_STAT_INCR(sctps_sendnocrc);
11094 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11095 mout->m_pkthdr.csum_data = 0;
11096 SCTP_STAT_INCR(sctps_sendhwcrc);
11099 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
11101 /* Free the route if we got one back */
11106 SCTP_STAT_INCR(sctps_sendpackets);
11107 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11108 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11114 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11115 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11120 struct sctp_tmit_chunk *chk;
11121 struct sctp_heartbeat_chunk *hb;
11122 struct timeval now;
11124 SCTP_TCB_LOCK_ASSERT(stcb);
11128 (void)SCTP_GETTIME_TIMEVAL(&now);
11129 switch (net->ro._l_addr.sa.sa_family) {
11141 sctp_alloc_a_chunk(stcb, chk);
11143 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11146 chk->copy_by_ref = 0;
11147 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11148 chk->rec.chunk_id.can_take_data = 1;
11149 chk->asoc = &stcb->asoc;
11150 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11152 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11153 if (chk->data == NULL) {
11154 sctp_free_a_chunk(stcb, chk, so_locked);
11157 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11158 SCTP_BUF_LEN(chk->data) = chk->send_size;
11159 chk->sent = SCTP_DATAGRAM_UNSENT;
11160 chk->snd_count = 0;
11162 atomic_add_int(&chk->whoTo->ref_count, 1);
11163 /* Now we have a mbuf that we can fill in with the details */
11164 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11165 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11166 /* fill out chunk header */
11167 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11168 hb->ch.chunk_flags = 0;
11169 hb->ch.chunk_length = htons(chk->send_size);
11170 /* Fill out hb parameter */
11171 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11172 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11173 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11174 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11175 /* Did our user request this one, put it in */
11176 hb->heartbeat.hb_info.addr_family = net->ro._l_addr.sa.sa_family;
11177 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11178 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11180 * we only take from the entropy pool if the address is not
11183 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11184 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11186 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11187 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11189 switch (net->ro._l_addr.sa.sa_family) {
11192 memcpy(hb->heartbeat.hb_info.address,
11193 &net->ro._l_addr.sin.sin_addr,
11194 sizeof(net->ro._l_addr.sin.sin_addr));
11199 memcpy(hb->heartbeat.hb_info.address,
11200 &net->ro._l_addr.sin6.sin6_addr,
11201 sizeof(net->ro._l_addr.sin6.sin6_addr));
11208 net->hb_responded = 0;
11209 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11210 stcb->asoc.ctrl_queue_cnt++;
11211 SCTP_STAT_INCR(sctps_sendheartbeat);
11216 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11219 struct sctp_association *asoc;
11220 struct sctp_ecne_chunk *ecne;
11221 struct sctp_tmit_chunk *chk;
11226 asoc = &stcb->asoc;
11227 SCTP_TCB_LOCK_ASSERT(stcb);
11228 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11229 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11230 /* found a previous ECN_ECHO update it if needed */
11231 uint32_t cnt, ctsn;
11233 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11234 ctsn = ntohl(ecne->tsn);
11235 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11236 ecne->tsn = htonl(high_tsn);
11237 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11239 cnt = ntohl(ecne->num_pkts_since_cwr);
11241 ecne->num_pkts_since_cwr = htonl(cnt);
11245 /* nope could not find one to update so we must build one */
11246 sctp_alloc_a_chunk(stcb, chk);
11250 chk->copy_by_ref = 0;
11251 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11252 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11253 chk->rec.chunk_id.can_take_data = 0;
11254 chk->asoc = &stcb->asoc;
11255 chk->send_size = sizeof(struct sctp_ecne_chunk);
11256 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11257 if (chk->data == NULL) {
11258 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11261 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11262 SCTP_BUF_LEN(chk->data) = chk->send_size;
11263 chk->sent = SCTP_DATAGRAM_UNSENT;
11264 chk->snd_count = 0;
11266 atomic_add_int(&chk->whoTo->ref_count, 1);
11268 stcb->asoc.ecn_echo_cnt_onq++;
11269 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11270 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11271 ecne->ch.chunk_flags = 0;
11272 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11273 ecne->tsn = htonl(high_tsn);
11274 ecne->num_pkts_since_cwr = htonl(1);
11275 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11276 asoc->ctrl_queue_cnt++;
11280 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11281 struct mbuf *m, int iphlen, int bad_crc)
11283 struct sctp_association *asoc;
11284 struct sctp_pktdrop_chunk *drp;
11285 struct sctp_tmit_chunk *chk;
11292 struct ip6_hdr *ip6h;
11295 int fullsz = 0, extra = 0;
11298 struct sctp_chunkhdr *ch, chunk_buf;
11299 unsigned int chk_length;
11304 asoc = &stcb->asoc;
11305 SCTP_TCB_LOCK_ASSERT(stcb);
11306 if (asoc->peer_supports_pktdrop == 0) {
11308 * peer must declare support before I send one.
11312 if (stcb->sctp_socket == NULL) {
11315 sctp_alloc_a_chunk(stcb, chk);
11319 chk->copy_by_ref = 0;
11320 iph = mtod(m, struct ip *);
11322 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11325 switch (iph->ip_v) {
11329 len = chk->send_size = iph->ip_len;
11333 case IPV6_VERSION >> 4:
11335 ip6h = mtod(m, struct ip6_hdr *);
11336 len = chk->send_size = htons(ip6h->ip6_plen);
11342 /* Validate that we do not have an ABORT in here. */
11343 offset = iphlen + sizeof(struct sctphdr);
11344 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11345 sizeof(*ch), (uint8_t *) & chunk_buf);
11346 while (ch != NULL) {
11347 chk_length = ntohs(ch->chunk_length);
11348 if (chk_length < sizeof(*ch)) {
11349 /* break to abort land */
11352 switch (ch->chunk_type) {
11353 case SCTP_PACKET_DROPPED:
11354 case SCTP_ABORT_ASSOCIATION:
11355 case SCTP_INITIATION_ACK:
11357 * We don't respond with an PKT-DROP to an ABORT
11358 * or PKT-DROP. We also do not respond to an
11359 * INIT-ACK, because we can't know if the initiation
11360 * tag is correct or not.
11362 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11367 offset += SCTP_SIZE32(chk_length);
11368 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11369 sizeof(*ch), (uint8_t *) & chunk_buf);
11372 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11373 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11375 * only send 1 mtu worth, trim off the excess on the end.
11377 fullsz = len - extra;
11378 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11381 chk->asoc = &stcb->asoc;
11382 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11383 if (chk->data == NULL) {
11385 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11388 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11389 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11391 sctp_m_freem(chk->data);
11395 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11396 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11397 chk->book_size_scale = 0;
11399 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11400 drp->trunc_len = htons(fullsz);
11402 * Len is already adjusted to size minus overhead above take
11403 * out the pkt_drop chunk itself from it.
11405 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11406 len = chk->send_size;
11408 /* no truncation needed */
11409 drp->ch.chunk_flags = 0;
11410 drp->trunc_len = htons(0);
11413 drp->ch.chunk_flags |= SCTP_BADCRC;
11415 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11416 SCTP_BUF_LEN(chk->data) = chk->send_size;
11417 chk->sent = SCTP_DATAGRAM_UNSENT;
11418 chk->snd_count = 0;
11420 /* we should hit here */
11422 atomic_add_int(&chk->whoTo->ref_count, 1);
11426 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11427 chk->rec.chunk_id.can_take_data = 1;
11428 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11429 drp->ch.chunk_length = htons(chk->send_size);
11430 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11434 drp->bottle_bw = htonl(spc);
11435 if (asoc->my_rwnd) {
11436 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11437 asoc->size_on_all_streams +
11438 asoc->my_rwnd_control_len +
11439 stcb->sctp_socket->so_rcv.sb_cc);
11442 * If my rwnd is 0, possibly from mbuf depletion as well as
11443 * space used, tell the peer there is NO space aka onq == bw
11445 drp->current_onq = htonl(spc);
11449 m_copydata(m, iphlen, len, (caddr_t)datap);
11450 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11451 asoc->ctrl_queue_cnt++;
11455 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11457 struct sctp_association *asoc;
11458 struct sctp_cwr_chunk *cwr;
11459 struct sctp_tmit_chunk *chk;
11461 asoc = &stcb->asoc;
11462 SCTP_TCB_LOCK_ASSERT(stcb);
11466 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11467 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11469 * found a previous CWR queued to same destination
11470 * update it if needed
11474 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11475 ctsn = ntohl(cwr->tsn);
11476 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11477 cwr->tsn = htonl(high_tsn);
11479 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11480 /* Make sure override is carried */
11481 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11486 sctp_alloc_a_chunk(stcb, chk);
11490 chk->copy_by_ref = 0;
11491 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11492 chk->rec.chunk_id.can_take_data = 1;
11493 chk->asoc = &stcb->asoc;
11494 chk->send_size = sizeof(struct sctp_cwr_chunk);
11495 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_DONTWAIT, 1, MT_HEADER);
11496 if (chk->data == NULL) {
11497 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11500 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11501 SCTP_BUF_LEN(chk->data) = chk->send_size;
11502 chk->sent = SCTP_DATAGRAM_UNSENT;
11503 chk->snd_count = 0;
11505 atomic_add_int(&chk->whoTo->ref_count, 1);
11506 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11507 cwr->ch.chunk_type = SCTP_ECN_CWR;
11508 cwr->ch.chunk_flags = override;
11509 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11510 cwr->tsn = htonl(high_tsn);
11511 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11512 asoc->ctrl_queue_cnt++;
11516 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11517 int number_entries, uint16_t * list,
11518 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11520 int len, old_len, i;
11521 struct sctp_stream_reset_out_request *req_out;
11522 struct sctp_chunkhdr *ch;
11524 ch = mtod(chk->data, struct sctp_chunkhdr *);
11527 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11529 /* get to new offset for the param. */
11530 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11531 /* now how long will this param be? */
11532 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11533 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11534 req_out->ph.param_length = htons(len);
11535 req_out->request_seq = htonl(seq);
11536 req_out->response_seq = htonl(resp_seq);
11537 req_out->send_reset_at_tsn = htonl(last_sent);
11538 if (number_entries) {
11539 for (i = 0; i < number_entries; i++) {
11540 req_out->list_of_streams[i] = htons(list[i]);
11543 if (SCTP_SIZE32(len) > len) {
11545 * Need to worry about the pad we may end up adding to the
11546 * end. This is easy since the struct is either aligned to 4
11547 * bytes or 2 bytes off.
11549 req_out->list_of_streams[number_entries] = 0;
11551 /* now fix the chunk length */
11552 ch->chunk_length = htons(len + old_len);
11553 chk->book_size = len + old_len;
11554 chk->book_size_scale = 0;
11555 chk->send_size = SCTP_SIZE32(chk->book_size);
11556 SCTP_BUF_LEN(chk->data) = chk->send_size;
11562 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11563 int number_entries, uint16_t * list,
11566 int len, old_len, i;
11567 struct sctp_stream_reset_in_request *req_in;
11568 struct sctp_chunkhdr *ch;
11570 ch = mtod(chk->data, struct sctp_chunkhdr *);
11573 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11575 /* get to new offset for the param. */
11576 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11577 /* now how long will this param be? */
11578 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11579 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11580 req_in->ph.param_length = htons(len);
11581 req_in->request_seq = htonl(seq);
11582 if (number_entries) {
11583 for (i = 0; i < number_entries; i++) {
11584 req_in->list_of_streams[i] = htons(list[i]);
11587 if (SCTP_SIZE32(len) > len) {
11589 * Need to worry about the pad we may end up adding to the
11590 * end. This is easy since the struct is either aligned to 4
11591 * bytes or 2 bytes off.
11593 req_in->list_of_streams[number_entries] = 0;
11595 /* now fix the chunk length */
11596 ch->chunk_length = htons(len + old_len);
11597 chk->book_size = len + old_len;
11598 chk->book_size_scale = 0;
11599 chk->send_size = SCTP_SIZE32(chk->book_size);
11600 SCTP_BUF_LEN(chk->data) = chk->send_size;
11606 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11610 struct sctp_stream_reset_tsn_request *req_tsn;
11611 struct sctp_chunkhdr *ch;
11613 ch = mtod(chk->data, struct sctp_chunkhdr *);
11616 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11618 /* get to new offset for the param. */
11619 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11620 /* now how long will this param be? */
11621 len = sizeof(struct sctp_stream_reset_tsn_request);
11622 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11623 req_tsn->ph.param_length = htons(len);
11624 req_tsn->request_seq = htonl(seq);
11626 /* now fix the chunk length */
11627 ch->chunk_length = htons(len + old_len);
11628 chk->send_size = len + old_len;
11629 chk->book_size = SCTP_SIZE32(chk->send_size);
11630 chk->book_size_scale = 0;
11631 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11636 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11637 uint32_t resp_seq, uint32_t result)
11640 struct sctp_stream_reset_response *resp;
11641 struct sctp_chunkhdr *ch;
11643 ch = mtod(chk->data, struct sctp_chunkhdr *);
11646 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11648 /* get to new offset for the param. */
11649 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11650 /* now how long will this param be? */
11651 len = sizeof(struct sctp_stream_reset_response);
11652 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11653 resp->ph.param_length = htons(len);
11654 resp->response_seq = htonl(resp_seq);
11655 resp->result = ntohl(result);
11657 /* now fix the chunk length */
11658 ch->chunk_length = htons(len + old_len);
11659 chk->book_size = len + old_len;
11660 chk->book_size_scale = 0;
11661 chk->send_size = SCTP_SIZE32(chk->book_size);
11662 SCTP_BUF_LEN(chk->data) = chk->send_size;
11669 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11670 uint32_t resp_seq, uint32_t result,
11671 uint32_t send_una, uint32_t recv_next)
11674 struct sctp_stream_reset_response_tsn *resp;
11675 struct sctp_chunkhdr *ch;
11677 ch = mtod(chk->data, struct sctp_chunkhdr *);
11680 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11682 /* get to new offset for the param. */
11683 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11684 /* now how long will this param be? */
11685 len = sizeof(struct sctp_stream_reset_response_tsn);
11686 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11687 resp->ph.param_length = htons(len);
11688 resp->response_seq = htonl(resp_seq);
11689 resp->result = htonl(result);
11690 resp->senders_next_tsn = htonl(send_una);
11691 resp->receivers_next_tsn = htonl(recv_next);
11693 /* now fix the chunk length */
11694 ch->chunk_length = htons(len + old_len);
11695 chk->book_size = len + old_len;
11696 chk->send_size = SCTP_SIZE32(chk->book_size);
11697 chk->book_size_scale = 0;
11698 SCTP_BUF_LEN(chk->data) = chk->send_size;
11703 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11708 struct sctp_chunkhdr *ch;
11709 struct sctp_stream_reset_add_strm *addstr;
11711 ch = mtod(chk->data, struct sctp_chunkhdr *);
11712 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11714 /* get to new offset for the param. */
11715 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11716 /* now how long will this param be? */
11717 len = sizeof(struct sctp_stream_reset_add_strm);
11720 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11721 addstr->ph.param_length = htons(len);
11722 addstr->request_seq = htonl(seq);
11723 addstr->number_of_streams = htons(adding);
11724 addstr->reserved = 0;
11726 /* now fix the chunk length */
11727 ch->chunk_length = htons(len + old_len);
11728 chk->send_size = len + old_len;
11729 chk->book_size = SCTP_SIZE32(chk->send_size);
11730 chk->book_size_scale = 0;
11731 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11736 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11741 struct sctp_chunkhdr *ch;
11742 struct sctp_stream_reset_add_strm *addstr;
11744 ch = mtod(chk->data, struct sctp_chunkhdr *);
11745 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11747 /* get to new offset for the param. */
11748 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11749 /* now how long will this param be? */
11750 len = sizeof(struct sctp_stream_reset_add_strm);
11752 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11753 addstr->ph.param_length = htons(len);
11754 addstr->request_seq = htonl(seq);
11755 addstr->number_of_streams = htons(adding);
11756 addstr->reserved = 0;
11758 /* now fix the chunk length */
11759 ch->chunk_length = htons(len + old_len);
11760 chk->send_size = len + old_len;
11761 chk->book_size = SCTP_SIZE32(chk->send_size);
11762 chk->book_size_scale = 0;
11763 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11770 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11771 int number_entries, uint16_t * list,
11772 uint8_t send_out_req,
11773 uint8_t send_in_req,
11774 uint8_t send_tsn_req,
11775 uint8_t add_stream,
11777 uint16_t adding_i, uint8_t peer_asked
11781 struct sctp_association *asoc;
11782 struct sctp_tmit_chunk *chk;
11783 struct sctp_chunkhdr *ch;
11786 asoc = &stcb->asoc;
11787 if (asoc->stream_reset_outstanding) {
11789 * Already one pending, must get ACK back to clear the flag.
11791 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11794 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11795 (add_stream == 0)) {
11796 /* nothing to do */
11797 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11800 if (send_tsn_req && (send_out_req || send_in_req)) {
11801 /* error, can't do that */
11802 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11805 sctp_alloc_a_chunk(stcb, chk);
11807 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11810 chk->copy_by_ref = 0;
11811 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11812 chk->rec.chunk_id.can_take_data = 0;
11813 chk->asoc = &stcb->asoc;
11814 chk->book_size = sizeof(struct sctp_chunkhdr);
11815 chk->send_size = SCTP_SIZE32(chk->book_size);
11816 chk->book_size_scale = 0;
11818 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
11819 if (chk->data == NULL) {
11820 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11821 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11824 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11826 /* setup chunk parameters */
11827 chk->sent = SCTP_DATAGRAM_UNSENT;
11828 chk->snd_count = 0;
11829 if (stcb->asoc.alternate) {
11830 chk->whoTo = stcb->asoc.alternate;
11832 chk->whoTo = stcb->asoc.primary_destination;
11834 atomic_add_int(&chk->whoTo->ref_count, 1);
11835 ch = mtod(chk->data, struct sctp_chunkhdr *);
11836 ch->chunk_type = SCTP_STREAM_RESET;
11837 ch->chunk_flags = 0;
11838 ch->chunk_length = htons(chk->book_size);
11839 SCTP_BUF_LEN(chk->data) = chk->send_size;
11841 seq = stcb->asoc.str_reset_seq_out;
11842 if (send_out_req) {
11843 sctp_add_stream_reset_out(chk, number_entries, list,
11844 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11845 asoc->stream_reset_out_is_outstanding = 1;
11847 asoc->stream_reset_outstanding++;
11849 if ((add_stream & 1) &&
11850 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11851 /* Need to allocate more */
11852 struct sctp_stream_out *oldstream;
11853 struct sctp_stream_queue_pending *sp, *nsp;
11856 oldstream = stcb->asoc.strmout;
11857 /* get some more */
11858 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11859 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11861 if (stcb->asoc.strmout == NULL) {
11864 stcb->asoc.strmout = oldstream;
11865 /* Turn off the bit */
11866 x = add_stream & 0xfe;
11871 * Ok now we proceed with copying the old out stuff and
11872 * initializing the new stuff.
11874 SCTP_TCB_SEND_LOCK(stcb);
11875 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11876 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11877 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11878 stcb->asoc.strmout[i].next_sequence_sent = oldstream[i].next_sequence_sent;
11879 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11880 stcb->asoc.strmout[i].stream_no = i;
11881 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11882 /* now anything on those queues? */
11883 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11884 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11885 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11887 /* Now move assoc pointers too */
11888 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11889 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11891 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11892 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11895 /* now the new streams */
11896 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11897 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11898 stcb->asoc.strmout[i].next_sequence_sent = 0x0;
11899 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11900 stcb->asoc.strmout[i].stream_no = i;
11901 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11902 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11904 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11905 SCTP_FREE(oldstream, SCTP_M_STRMO);
11906 SCTP_TCB_SEND_UNLOCK(stcb);
11909 if ((add_stream & 1) && (adding_o > 0)) {
11910 asoc->strm_pending_add_size = adding_o;
11911 asoc->peer_req_out = peer_asked;
11912 sctp_add_an_out_stream(chk, seq, adding_o);
11914 asoc->stream_reset_outstanding++;
11916 if ((add_stream & 2) && (adding_i > 0)) {
11917 sctp_add_an_in_stream(chk, seq, adding_i);
11919 asoc->stream_reset_outstanding++;
11922 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11924 asoc->stream_reset_outstanding++;
11926 if (send_tsn_req) {
11927 sctp_add_stream_reset_tsn(chk, seq);
11928 asoc->stream_reset_outstanding++;
11930 asoc->str_reset = chk;
11931 /* insert the chunk for sending */
11932 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11935 asoc->ctrl_queue_cnt++;
11936 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11941 sctp_send_abort(struct mbuf *m, int iphlen, struct sctphdr *sh, uint32_t vtag,
11942 struct mbuf *err_cause, uint32_t vrf_id, uint16_t port)
11945 * Formulate the abort message, and send it back down.
11947 struct mbuf *o_pak;
11949 struct sctp_abort_msg *abm;
11951 struct udphdr *udp;
11952 int iphlen_out, len;
11955 struct ip *iph_out;
11959 struct ip6_hdr *ip6, *ip6_out;
11963 /* don't respond to ABORT with ABORT */
11964 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11966 sctp_m_freem(err_cause);
11969 iph = mtod(m, struct ip *);
11970 switch (iph->ip_v) {
11973 len = (sizeof(struct ip) + sizeof(struct sctp_abort_msg));
11977 case IPV6_VERSION >> 4:
11978 len = (sizeof(struct ip6_hdr) + sizeof(struct sctp_abort_msg));
11983 sctp_m_freem(err_cause);
11988 len += sizeof(struct udphdr);
11990 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
11991 if (mout == NULL) {
11993 sctp_m_freem(err_cause);
11997 SCTP_BUF_RESV_UF(mout, max_linkhdr);
11998 SCTP_BUF_LEN(mout) = len;
11999 SCTP_BUF_NEXT(mout) = err_cause;
12000 if (m->m_flags & M_FLOWID) {
12001 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12002 mout->m_flags |= M_FLOWID;
12010 switch (iph->ip_v) {
12013 iph_out = mtod(mout, struct ip *);
12015 /* Fill in the IP header for the ABORT */
12016 iph_out->ip_v = IPVERSION;
12017 iph_out->ip_hl = (sizeof(struct ip) / 4);
12018 iph_out->ip_tos = (u_char)0;
12019 iph_out->ip_id = 0;
12020 iph_out->ip_off = 0;
12021 iph_out->ip_ttl = MAXTTL;
12023 iph_out->ip_p = IPPROTO_UDP;
12025 iph_out->ip_p = IPPROTO_SCTP;
12027 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12028 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12029 /* let IP layer calculate this */
12030 iph_out->ip_sum = 0;
12032 iphlen_out = sizeof(*iph_out);
12033 abm = (struct sctp_abort_msg *)((caddr_t)iph_out + iphlen_out);
12037 case IPV6_VERSION >> 4:
12038 ip6 = (struct ip6_hdr *)iph;
12039 ip6_out = mtod(mout, struct ip6_hdr *);
12041 /* Fill in the IP6 header for the ABORT */
12042 ip6_out->ip6_flow = ip6->ip6_flow;
12043 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12045 ip6_out->ip6_nxt = IPPROTO_UDP;
12047 ip6_out->ip6_nxt = IPPROTO_SCTP;
12049 ip6_out->ip6_src = ip6->ip6_dst;
12050 ip6_out->ip6_dst = ip6->ip6_src;
12052 iphlen_out = sizeof(*ip6_out);
12053 abm = (struct sctp_abort_msg *)((caddr_t)ip6_out + iphlen_out);
12057 /* Currently not supported */
12058 sctp_m_freem(mout);
12062 udp = (struct udphdr *)abm;
12064 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12065 sctp_m_freem(mout);
12068 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12069 udp->uh_dport = port;
12070 /* set udp->uh_ulen later */
12072 iphlen_out += sizeof(struct udphdr);
12073 abm = (struct sctp_abort_msg *)((caddr_t)abm + sizeof(struct udphdr));
12075 abm->sh.src_port = sh->dest_port;
12076 abm->sh.dest_port = sh->src_port;
12077 abm->sh.checksum = 0;
12079 abm->sh.v_tag = sh->v_tag;
12080 abm->msg.ch.chunk_flags = SCTP_HAD_NO_TCB;
12082 abm->sh.v_tag = htonl(vtag);
12083 abm->msg.ch.chunk_flags = 0;
12085 abm->msg.ch.chunk_type = SCTP_ABORT_ASSOCIATION;
12088 struct mbuf *m_tmp = err_cause;
12091 /* get length of the err_cause chain */
12092 while (m_tmp != NULL) {
12093 err_len += SCTP_BUF_LEN(m_tmp);
12094 m_tmp = SCTP_BUF_NEXT(m_tmp);
12096 len = SCTP_BUF_LEN(mout) + err_len;
12098 /* need pad at end of chunk */
12099 uint32_t cpthis = 0;
12102 padlen = 4 - (len % 4);
12103 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12106 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch) + err_len);
12108 len = SCTP_BUF_LEN(mout);
12109 abm->msg.ch.chunk_length = htons(sizeof(abm->msg.ch));
12112 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12114 sctp_m_freem(mout);
12118 if (iph_out != NULL) {
12122 /* zap the stack pointer to the route */
12123 bzero(&ro, sizeof ro);
12125 udp->uh_ulen = htons(len - sizeof(struct ip));
12127 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12132 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip_output:\n");
12133 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, iph_out, &abm->sh);
12134 /* set IPv4 length */
12135 iph_out->ip_len = len;
12137 #ifdef SCTP_PACKET_LOGGING
12138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12139 sctp_packet_log(mout, len);
12141 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12143 #if defined(SCTP_WITH_NO_CSUM)
12144 SCTP_STAT_INCR(sctps_sendnocrc);
12146 abm->sh.checksum = sctp_calculate_cksum(mout, iphlen_out);
12147 SCTP_STAT_INCR(sctps_sendswcrc);
12150 SCTP_ENABLE_UDP_CSUM(o_pak);
12153 #if defined(SCTP_WITH_NO_CSUM)
12154 SCTP_STAT_INCR(sctps_sendnocrc);
12156 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12157 mout->m_pkthdr.csum_data = 0;
12158 SCTP_STAT_INCR(sctps_sendhwcrc);
12161 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12163 /* Free the route if we got one back */
12169 if (ip6_out != NULL) {
12170 struct route_in6 ro;
12172 struct ifnet *ifp = NULL;
12174 /* zap the stack pointer to the route */
12175 bzero(&ro, sizeof(ro));
12177 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12179 SCTPDBG(SCTP_DEBUG_OUTPUT2, "sctp_send_abort calling ip6_output:\n");
12180 SCTPDBG_PKT(SCTP_DEBUG_OUTPUT2, (struct ip *)ip6_out, &abm->sh);
12181 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12182 #ifdef SCTP_PACKET_LOGGING
12183 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12184 sctp_packet_log(mout, len);
12186 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12188 #if defined(SCTP_WITH_NO_CSUM)
12189 SCTP_STAT_INCR(sctps_sendnocrc);
12191 abm->sh.checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12192 SCTP_STAT_INCR(sctps_sendswcrc);
12194 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12195 udp->uh_sum = 0xffff;
12198 #if defined(SCTP_WITH_NO_CSUM)
12199 SCTP_STAT_INCR(sctps_sendnocrc);
12201 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12202 mout->m_pkthdr.csum_data = 0;
12203 SCTP_STAT_INCR(sctps_sendhwcrc);
12206 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12208 /* Free the route if we got one back */
12213 SCTP_STAT_INCR(sctps_sendpackets);
12214 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12215 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12219 sctp_send_operr_to(struct mbuf *m, int iphlen, struct mbuf *scm, uint32_t vtag,
12220 uint32_t vrf_id, uint16_t port)
12222 struct mbuf *o_pak;
12223 struct sctphdr *sh, *sh_out;
12224 struct sctp_chunkhdr *ch;
12226 struct udphdr *udp = NULL;
12228 int iphlen_out, len;
12231 struct ip *iph_out;
12235 struct ip6_hdr *ip6, *ip6_out;
12239 iph = mtod(m, struct ip *);
12240 sh = (struct sctphdr *)((caddr_t)iph + iphlen);
12241 switch (iph->ip_v) {
12244 len = (sizeof(struct ip) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12248 case IPV6_VERSION >> 4:
12249 len = (sizeof(struct ip6_hdr) + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr));
12259 len += sizeof(struct udphdr);
12261 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_DONTWAIT, 1, MT_DATA);
12262 if (mout == NULL) {
12268 SCTP_BUF_RESV_UF(mout, max_linkhdr);
12269 SCTP_BUF_LEN(mout) = len;
12270 SCTP_BUF_NEXT(mout) = scm;
12271 if (m->m_flags & M_FLOWID) {
12272 mout->m_pkthdr.flowid = m->m_pkthdr.flowid;
12273 mout->m_flags |= M_FLOWID;
12281 switch (iph->ip_v) {
12284 iph_out = mtod(mout, struct ip *);
12286 /* Fill in the IP header for the ABORT */
12287 iph_out->ip_v = IPVERSION;
12288 iph_out->ip_hl = (sizeof(struct ip) / 4);
12289 iph_out->ip_tos = (u_char)0;
12290 iph_out->ip_id = 0;
12291 iph_out->ip_off = 0;
12292 iph_out->ip_ttl = MAXTTL;
12294 iph_out->ip_p = IPPROTO_UDP;
12296 iph_out->ip_p = IPPROTO_SCTP;
12298 iph_out->ip_src.s_addr = iph->ip_dst.s_addr;
12299 iph_out->ip_dst.s_addr = iph->ip_src.s_addr;
12300 /* let IP layer calculate this */
12301 iph_out->ip_sum = 0;
12303 iphlen_out = sizeof(struct ip);
12304 sh_out = (struct sctphdr *)((caddr_t)iph_out + iphlen_out);
12308 case IPV6_VERSION >> 4:
12309 ip6 = (struct ip6_hdr *)iph;
12310 ip6_out = mtod(mout, struct ip6_hdr *);
12312 /* Fill in the IP6 header for the ABORT */
12313 ip6_out->ip6_flow = ip6->ip6_flow;
12314 ip6_out->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
12316 ip6_out->ip6_nxt = IPPROTO_UDP;
12318 ip6_out->ip6_nxt = IPPROTO_SCTP;
12320 ip6_out->ip6_src = ip6->ip6_dst;
12321 ip6_out->ip6_dst = ip6->ip6_src;
12323 iphlen_out = sizeof(struct ip6_hdr);
12324 sh_out = (struct sctphdr *)((caddr_t)ip6_out + iphlen_out);
12328 /* Currently not supported */
12329 sctp_m_freem(mout);
12333 udp = (struct udphdr *)sh_out;
12335 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
12336 sctp_m_freem(mout);
12339 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
12340 udp->uh_dport = port;
12341 /* set udp->uh_ulen later */
12343 iphlen_out += sizeof(struct udphdr);
12344 sh_out = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
12346 sh_out->src_port = sh->dest_port;
12347 sh_out->dest_port = sh->src_port;
12348 sh_out->v_tag = vtag;
12349 sh_out->checksum = 0;
12351 ch = (struct sctp_chunkhdr *)((caddr_t)sh_out + sizeof(struct sctphdr));
12352 ch->chunk_type = SCTP_OPERATION_ERROR;
12353 ch->chunk_flags = 0;
12356 struct mbuf *m_tmp = scm;
12359 /* get length of the err_cause chain */
12360 while (m_tmp != NULL) {
12361 cause_len += SCTP_BUF_LEN(m_tmp);
12362 m_tmp = SCTP_BUF_NEXT(m_tmp);
12364 len = SCTP_BUF_LEN(mout) + cause_len;
12365 if (cause_len % 4) {
12366 /* need pad at end of chunk */
12367 uint32_t cpthis = 0;
12370 padlen = 4 - (len % 4);
12371 m_copyback(mout, len, padlen, (caddr_t)&cpthis);
12374 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
12376 len = SCTP_BUF_LEN(mout);
12377 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr));
12380 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
12382 sctp_m_freem(mout);
12386 if (iph_out != NULL) {
12390 /* zap the stack pointer to the route */
12391 bzero(&ro, sizeof ro);
12393 udp->uh_ulen = htons(len - sizeof(struct ip));
12395 udp->uh_sum = in_pseudo(iph_out->ip_src.s_addr, iph_out->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
12400 /* set IPv4 length */
12401 iph_out->ip_len = len;
12403 #ifdef SCTP_PACKET_LOGGING
12404 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12405 sctp_packet_log(mout, len);
12407 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12409 #if defined(SCTP_WITH_NO_CSUM)
12410 SCTP_STAT_INCR(sctps_sendnocrc);
12412 sh_out->checksum = sctp_calculate_cksum(mout, iphlen_out);
12413 SCTP_STAT_INCR(sctps_sendswcrc);
12416 SCTP_ENABLE_UDP_CSUM(o_pak);
12419 #if defined(SCTP_WITH_NO_CSUM)
12420 SCTP_STAT_INCR(sctps_sendnocrc);
12422 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12423 mout->m_pkthdr.csum_data = 0;
12424 SCTP_STAT_INCR(sctps_sendhwcrc);
12427 SCTP_IP_OUTPUT(ret, o_pak, &ro, NULL, vrf_id);
12429 /* Free the route if we got one back */
12435 if (ip6_out != NULL) {
12436 struct route_in6 ro;
12438 struct ifnet *ifp = NULL;
12440 /* zap the stack pointer to the route */
12441 bzero(&ro, sizeof(ro));
12443 udp->uh_ulen = htons(len - sizeof(struct ip6_hdr));
12445 ip6_out->ip6_plen = len - sizeof(*ip6_out);
12446 #ifdef SCTP_PACKET_LOGGING
12447 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
12448 sctp_packet_log(mout, len);
12450 SCTP_ATTACH_CHAIN(o_pak, mout, len);
12452 #if defined(SCTP_WITH_NO_CSUM)
12453 SCTP_STAT_INCR(sctps_sendnocrc);
12455 sh_out->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
12456 SCTP_STAT_INCR(sctps_sendswcrc);
12458 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
12459 udp->uh_sum = 0xffff;
12462 #if defined(SCTP_WITH_NO_CSUM)
12463 SCTP_STAT_INCR(sctps_sendnocrc);
12465 mout->m_pkthdr.csum_flags = CSUM_SCTP;
12466 mout->m_pkthdr.csum_data = 0;
12467 SCTP_STAT_INCR(sctps_sendhwcrc);
12470 SCTP_IP6_OUTPUT(ret, o_pak, &ro, &ifp, NULL, vrf_id);
12472 /* Free the route if we got one back */
12477 SCTP_STAT_INCR(sctps_sendpackets);
12478 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
12479 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
12482 static struct mbuf *
12483 sctp_copy_resume(struct uio *uio,
12485 int user_marks_eor,
12488 struct mbuf **new_tail)
12492 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
12493 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
12495 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12498 *sndout = m_length(m, NULL);
12499 *new_tail = m_last(m);
12505 sctp_copy_one(struct sctp_stream_queue_pending *sp,
12512 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
12514 if (sp->data == NULL) {
12515 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12518 sp->tail_mbuf = m_last(sp->data);
12524 static struct sctp_stream_queue_pending *
12525 sctp_copy_it_in(struct sctp_tcb *stcb,
12526 struct sctp_association *asoc,
12527 struct sctp_sndrcvinfo *srcv,
12529 struct sctp_nets *net,
12531 int user_marks_eor,
12535 * This routine must be very careful in its work. Protocol
12536 * processing is up and running so care must be taken to spl...()
12537 * when you need to do something that may effect the stcb/asoc. The
12538 * sb is locked however. When data is copied the protocol processing
12539 * should be enabled since this is a slower operation...
12541 struct sctp_stream_queue_pending *sp = NULL;
12545 /* Now can we send this? */
12546 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12547 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12548 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12549 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12550 /* got data while shutting down */
12551 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12552 *error = ECONNRESET;
12555 sctp_alloc_a_strmoq(stcb, sp);
12557 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12562 sp->sender_all_done = 0;
12563 sp->sinfo_flags = srcv->sinfo_flags;
12564 sp->timetolive = srcv->sinfo_timetolive;
12565 sp->ppid = srcv->sinfo_ppid;
12566 sp->context = srcv->sinfo_context;
12568 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12570 sp->stream = srcv->sinfo_stream;
12571 sp->length = min(uio->uio_resid, max_send_len);
12572 if ((sp->length == (uint32_t) uio->uio_resid) &&
12573 ((user_marks_eor == 0) ||
12574 (srcv->sinfo_flags & SCTP_EOF) ||
12575 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12576 sp->msg_is_complete = 1;
12578 sp->msg_is_complete = 0;
12580 sp->sender_all_done = 0;
12581 sp->some_taken = 0;
12582 sp->put_last_out = 0;
12583 resv_in_first = sizeof(struct sctp_data_chunk);
12584 sp->data = sp->tail_mbuf = NULL;
12585 if (sp->length == 0) {
12589 if (srcv->sinfo_keynumber_valid) {
12590 sp->auth_keyid = srcv->sinfo_keynumber;
12592 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12594 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12595 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12596 sp->holds_key_ref = 1;
12598 *error = sctp_copy_one(sp, uio, resv_in_first);
12601 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12604 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12606 atomic_add_int(&sp->net->ref_count, 1);
12610 sctp_set_prsctp_policy(sp);
12618 sctp_sosend(struct socket *so,
12619 struct sockaddr *addr,
12622 struct mbuf *control,
12627 int error, use_sndinfo = 0;
12628 struct sctp_sndrcvinfo sndrcvninfo;
12629 struct sockaddr *addr_to_use;
12631 #if defined(INET) && defined(INET6)
12632 struct sockaddr_in sin;
12637 /* process cmsg snd/rcv info (maybe a assoc-id) */
12638 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12639 sizeof(sndrcvninfo))) {
12644 addr_to_use = addr;
12645 #if defined(INET) && defined(INET6)
12646 if ((addr) && (addr->sa_family == AF_INET6)) {
12647 struct sockaddr_in6 *sin6;
12649 sin6 = (struct sockaddr_in6 *)addr;
12650 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12651 in6_sin6_2_sin(&sin, sin6);
12652 addr_to_use = (struct sockaddr *)&sin;
12656 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12659 use_sndinfo ? &sndrcvninfo : NULL
12667 sctp_lower_sosend(struct socket *so,
12668 struct sockaddr *addr,
12670 struct mbuf *i_pak,
12671 struct mbuf *control,
12673 struct sctp_sndrcvinfo *srcv
12678 unsigned int sndlen = 0, max_len;
12680 struct mbuf *top = NULL;
12681 int queue_only = 0, queue_only_for_init = 0;
12682 int free_cnt_applied = 0;
12684 int now_filled = 0;
12685 unsigned int inqueue_bytes = 0;
12686 struct sctp_block_entry be;
12687 struct sctp_inpcb *inp;
12688 struct sctp_tcb *stcb = NULL;
12689 struct timeval now;
12690 struct sctp_nets *net;
12691 struct sctp_association *asoc;
12692 struct sctp_inpcb *t_inp;
12693 int user_marks_eor;
12694 int create_lock_applied = 0;
12695 int nagle_applies = 0;
12696 int some_on_control = 0;
12697 int got_all_of_the_send = 0;
12698 int hold_tcblock = 0;
12699 int non_blocking = 0;
12700 uint32_t local_add_more, local_soresv = 0;
12702 uint16_t sinfo_flags;
12703 sctp_assoc_t sinfo_assoc_id;
12710 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12712 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12715 SCTP_RELEASE_PKT(i_pak);
12719 if ((uio == NULL) && (i_pak == NULL)) {
12720 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12723 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12724 atomic_add_int(&inp->total_sends, 1);
12726 if (uio->uio_resid < 0) {
12727 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12730 sndlen = uio->uio_resid;
12732 top = SCTP_HEADER_TO_CHAIN(i_pak);
12733 sndlen = SCTP_HEADER_LEN(i_pak);
12735 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12738 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12739 (inp->sctp_socket->so_qlimit)) {
12740 /* The listener can NOT send */
12741 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12746 * Pre-screen address, if one is given the sin-len
12747 * must be set correctly!
12750 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12752 switch (raddr->sa.sa_family) {
12755 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12756 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12760 port = raddr->sin.sin_port;
12765 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12766 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12770 port = raddr->sin6.sin6_port;
12774 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12775 error = EAFNOSUPPORT;
12782 sinfo_flags = srcv->sinfo_flags;
12783 sinfo_assoc_id = srcv->sinfo_assoc_id;
12784 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12785 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12786 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12790 if (srcv->sinfo_flags)
12791 SCTP_STAT_INCR(sctps_sends_with_flags);
12793 sinfo_flags = inp->def_send.sinfo_flags;
12794 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12796 if (sinfo_flags & SCTP_SENDALL) {
12797 /* its a sendall */
12798 error = sctp_sendall(inp, uio, top, srcv);
12802 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12803 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12807 /* now we must find the assoc */
12808 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12809 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12810 SCTP_INP_RLOCK(inp);
12811 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12813 SCTP_TCB_LOCK(stcb);
12816 SCTP_INP_RUNLOCK(inp);
12817 } else if (sinfo_assoc_id) {
12818 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12821 * Since we did not use findep we must
12822 * increment it, and if we don't find a tcb
12825 SCTP_INP_WLOCK(inp);
12826 SCTP_INP_INCR_REF(inp);
12827 SCTP_INP_WUNLOCK(inp);
12828 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12829 if (stcb == NULL) {
12830 SCTP_INP_WLOCK(inp);
12831 SCTP_INP_DECR_REF(inp);
12832 SCTP_INP_WUNLOCK(inp);
12837 if ((stcb == NULL) && (addr)) {
12838 /* Possible implicit send? */
12839 SCTP_ASOC_CREATE_LOCK(inp);
12840 create_lock_applied = 1;
12841 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12842 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12843 /* Should I really unlock ? */
12844 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12849 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12850 (addr->sa_family == AF_INET6)) {
12851 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12855 SCTP_INP_WLOCK(inp);
12856 SCTP_INP_INCR_REF(inp);
12857 SCTP_INP_WUNLOCK(inp);
12858 /* With the lock applied look again */
12859 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12860 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12861 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12863 if (stcb == NULL) {
12864 SCTP_INP_WLOCK(inp);
12865 SCTP_INP_DECR_REF(inp);
12866 SCTP_INP_WUNLOCK(inp);
12873 if (t_inp != inp) {
12874 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12879 if (stcb == NULL) {
12880 if (addr == NULL) {
12881 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12885 /* We must go ahead and start the INIT process */
12888 if ((sinfo_flags & SCTP_ABORT) ||
12889 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12891 * User asks to abort a non-existant assoc,
12892 * or EOF a non-existant assoc with no data
12894 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12898 /* get an asoc/stcb struct */
12899 vrf_id = inp->def_vrf_id;
12901 if (create_lock_applied == 0) {
12902 panic("Error, should hold create lock and I don't?");
12905 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12908 if (stcb == NULL) {
12909 /* Error is setup for us in the call */
12912 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12913 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12915 * Set the connected flag so we can queue
12918 soisconnecting(so);
12921 if (create_lock_applied) {
12922 SCTP_ASOC_CREATE_UNLOCK(inp);
12923 create_lock_applied = 0;
12925 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12928 * Turn on queue only flag to prevent data from
12932 asoc = &stcb->asoc;
12933 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12934 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12936 /* initialize authentication params for the assoc */
12937 sctp_initialize_auth_params(inp, stcb);
12940 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12941 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_7);
12947 /* out with the INIT */
12948 queue_only_for_init = 1;
12950 * we may want to dig in after this call and adjust the MTU
12951 * value. It defaulted to 1500 (constant) but the ro
12952 * structure may now have an update and thus we may need to
12953 * change it BEFORE we append the message.
12957 asoc = &stcb->asoc;
12959 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12960 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12962 net = sctp_findnet(stcb, addr);
12965 if ((net == NULL) ||
12966 ((port != 0) && (port != stcb->rport))) {
12967 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12972 if (stcb->asoc.alternate) {
12973 net = stcb->asoc.alternate;
12975 net = stcb->asoc.primary_destination;
12978 atomic_add_int(&stcb->total_sends, 1);
12979 /* Keep the stcb from being freed under our feet */
12980 atomic_add_int(&asoc->refcnt, 1);
12981 free_cnt_applied = 1;
12983 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12984 if (sndlen > asoc->smallest_mtu) {
12985 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12990 if (SCTP_SO_IS_NBIO(so)
12991 || (flags & MSG_NBIO)
12995 /* would we block? */
12996 if (non_blocking) {
12997 if (hold_tcblock == 0) {
12998 SCTP_TCB_LOCK(stcb);
13001 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13002 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
13003 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13004 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
13005 if (sndlen > SCTP_SB_LIMIT_SND(so))
13008 error = EWOULDBLOCK;
13011 stcb->asoc.sb_send_resv += sndlen;
13012 SCTP_TCB_UNLOCK(stcb);
13015 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
13017 local_soresv = sndlen;
13018 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13019 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13020 error = ECONNRESET;
13023 if (create_lock_applied) {
13024 SCTP_ASOC_CREATE_UNLOCK(inp);
13025 create_lock_applied = 0;
13027 if (asoc->stream_reset_outstanding) {
13029 * Can't queue any data while stream reset is underway.
13031 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
13035 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13036 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13039 /* we are now done with all control */
13041 sctp_m_freem(control);
13044 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
13045 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
13046 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
13047 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
13048 if (srcv->sinfo_flags & SCTP_ABORT) {
13051 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13052 error = ECONNRESET;
13056 /* Ok, we will attempt a msgsnd :> */
13058 p->td_ru.ru_msgsnd++;
13060 /* Are we aborting? */
13061 if (srcv->sinfo_flags & SCTP_ABORT) {
13063 int tot_demand, tot_out = 0, max_out;
13065 SCTP_STAT_INCR(sctps_sends_with_abort);
13066 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
13067 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
13068 /* It has to be up before we abort */
13069 /* how big is the user initiated abort? */
13070 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13074 if (hold_tcblock) {
13075 SCTP_TCB_UNLOCK(stcb);
13079 struct mbuf *cntm = NULL;
13081 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAIT, 1, MT_DATA);
13083 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
13084 tot_out += SCTP_BUF_LEN(cntm);
13088 /* Must fit in a MTU */
13090 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
13091 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
13093 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13097 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAIT, 1, MT_DATA);
13100 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
13104 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
13105 max_out -= sizeof(struct sctp_abort_msg);
13106 if (tot_out > max_out) {
13110 struct sctp_paramhdr *ph;
13112 /* now move forward the data pointer */
13113 ph = mtod(mm, struct sctp_paramhdr *);
13114 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
13115 ph->param_length = htons((sizeof(struct sctp_paramhdr) + tot_out));
13117 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
13119 error = uiomove((caddr_t)ph, (int)tot_out, uio);
13122 * Here if we can't get his data we
13123 * still abort we just don't get to
13124 * send the users note :-0
13131 SCTP_BUF_NEXT(mm) = top;
13135 if (hold_tcblock == 0) {
13136 SCTP_TCB_LOCK(stcb);
13138 atomic_add_int(&stcb->asoc.refcnt, -1);
13139 free_cnt_applied = 0;
13140 /* release this lock, otherwise we hang on ourselves */
13141 sctp_abort_an_association(stcb->sctp_ep, stcb,
13142 SCTP_RESPONSE_TO_USER_REQ,
13143 mm, SCTP_SO_LOCKED);
13144 /* now relock the stcb so everything is sane */
13148 * In this case top is already chained to mm avoid double
13149 * free, since we free it below if top != NULL and driver
13150 * would free it after sending the packet out
13157 /* Calculate the maximum we can send */
13158 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13159 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13160 if (non_blocking) {
13161 /* we already checked for non-blocking above. */
13164 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13169 if (hold_tcblock) {
13170 SCTP_TCB_UNLOCK(stcb);
13173 /* Is the stream no. valid? */
13174 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
13175 /* Invalid stream number */
13176 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13180 if (asoc->strmout == NULL) {
13181 /* huh? software error */
13182 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
13186 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
13187 if ((user_marks_eor == 0) &&
13188 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
13189 /* It will NEVER fit */
13190 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
13194 if ((uio == NULL) && user_marks_eor) {
13196 * We do not support eeor mode for
13197 * sending with mbuf chains (like sendfile).
13199 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13203 if (user_marks_eor) {
13204 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
13207 * For non-eeor the whole message must fit in
13208 * the socket send buffer.
13210 local_add_more = sndlen;
13213 if (non_blocking) {
13214 goto skip_preblock;
13216 if (((max_len <= local_add_more) &&
13217 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
13219 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13220 /* No room right now ! */
13221 SOCKBUF_LOCK(&so->so_snd);
13222 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13223 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
13224 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
13225 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
13226 (unsigned int)SCTP_SB_LIMIT_SND(so),
13229 stcb->asoc.stream_queue_cnt,
13230 stcb->asoc.chunks_on_out_queue,
13231 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
13232 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13233 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
13236 stcb->block_entry = &be;
13237 error = sbwait(&so->so_snd);
13238 stcb->block_entry = NULL;
13239 if (error || so->so_error || be.error) {
13242 error = so->so_error;
13247 SOCKBUF_UNLOCK(&so->so_snd);
13250 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13251 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13252 asoc, stcb->asoc.total_output_queue_size);
13254 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13257 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13259 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
13260 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13264 SOCKBUF_UNLOCK(&so->so_snd);
13267 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13271 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
13272 * case NOTE: uio will be null when top/mbuf is passed
13275 if (srcv->sinfo_flags & SCTP_EOF) {
13276 got_all_of_the_send = 1;
13279 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13285 struct sctp_stream_queue_pending *sp;
13286 struct sctp_stream_out *strm;
13289 SCTP_TCB_SEND_LOCK(stcb);
13290 if ((asoc->stream_locked) &&
13291 (asoc->stream_locked_on != srcv->sinfo_stream)) {
13292 SCTP_TCB_SEND_UNLOCK(stcb);
13293 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
13297 SCTP_TCB_SEND_UNLOCK(stcb);
13299 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
13300 if (strm->last_msg_incomplete == 0) {
13302 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
13303 if ((sp == NULL) || (error)) {
13306 SCTP_TCB_SEND_LOCK(stcb);
13307 if (sp->msg_is_complete) {
13308 strm->last_msg_incomplete = 0;
13309 asoc->stream_locked = 0;
13312 * Just got locked to this guy in case of an
13315 strm->last_msg_incomplete = 1;
13316 asoc->stream_locked = 1;
13317 asoc->stream_locked_on = srcv->sinfo_stream;
13318 sp->sender_all_done = 0;
13320 sctp_snd_sb_alloc(stcb, sp->length);
13321 atomic_add_int(&asoc->stream_queue_cnt, 1);
13322 if ((srcv->sinfo_flags & SCTP_UNORDERED) == 0) {
13323 sp->strseq = strm->next_sequence_sent;
13324 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_SCTP) {
13325 sctp_misc_ints(SCTP_STRMOUT_LOG_ASSIGN,
13326 (uintptr_t) stcb, sp->length,
13327 (uint32_t) ((srcv->sinfo_stream << 16) | sp->strseq), 0);
13329 strm->next_sequence_sent++;
13331 SCTP_STAT_INCR(sctps_sends_with_unord);
13333 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
13334 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
13335 SCTP_TCB_SEND_UNLOCK(stcb);
13337 SCTP_TCB_SEND_LOCK(stcb);
13338 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
13339 SCTP_TCB_SEND_UNLOCK(stcb);
13341 /* ???? Huh ??? last msg is gone */
13343 panic("Warning: Last msg marked incomplete, yet nothing left?");
13345 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
13346 strm->last_msg_incomplete = 0;
13352 while (uio->uio_resid > 0) {
13353 /* How much room do we have? */
13354 struct mbuf *new_tail, *mm;
13356 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13357 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
13361 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
13362 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
13363 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
13366 if (hold_tcblock) {
13367 SCTP_TCB_UNLOCK(stcb);
13370 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
13371 if ((mm == NULL) || error) {
13377 /* Update the mbuf and count */
13378 SCTP_TCB_SEND_LOCK(stcb);
13379 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13381 * we need to get out. Peer probably
13385 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
13386 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
13387 error = ECONNRESET;
13389 SCTP_TCB_SEND_UNLOCK(stcb);
13392 if (sp->tail_mbuf) {
13393 /* tack it to the end */
13394 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
13395 sp->tail_mbuf = new_tail;
13397 /* A stolen mbuf */
13399 sp->tail_mbuf = new_tail;
13401 sctp_snd_sb_alloc(stcb, sndout);
13402 atomic_add_int(&sp->length, sndout);
13405 /* Did we reach EOR? */
13406 if ((uio->uio_resid == 0) &&
13407 ((user_marks_eor == 0) ||
13408 (srcv->sinfo_flags & SCTP_EOF) ||
13409 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
13410 sp->msg_is_complete = 1;
13412 sp->msg_is_complete = 0;
13414 SCTP_TCB_SEND_UNLOCK(stcb);
13416 if (uio->uio_resid == 0) {
13421 if ((asoc->peer_supports_prsctp) && (asoc->sent_queue_cnt_removeable > 0)) {
13423 * This is ugly but we must assure locking
13426 if (hold_tcblock == 0) {
13427 SCTP_TCB_LOCK(stcb);
13430 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
13431 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
13432 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
13433 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
13439 SCTP_TCB_UNLOCK(stcb);
13442 /* wait for space now */
13443 if (non_blocking) {
13444 /* Non-blocking io in place out */
13447 /* What about the INIT, send it maybe */
13448 if (queue_only_for_init) {
13449 if (hold_tcblock == 0) {
13450 SCTP_TCB_LOCK(stcb);
13453 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13454 /* a collision took us forward? */
13457 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13458 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
13462 if ((net->flight_size > net->cwnd) &&
13463 (asoc->sctp_cmt_on_off == 0)) {
13464 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13466 } else if (asoc->ifp_had_enobuf) {
13467 SCTP_STAT_INCR(sctps_ifnomemqueued);
13468 if (net->flight_size > (2 * net->mtu)) {
13471 asoc->ifp_had_enobuf = 0;
13473 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13474 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13475 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13476 (stcb->asoc.total_flight > 0) &&
13477 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13478 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13481 * Ok, Nagle is set on and we have data outstanding.
13482 * Don't send anything and let SACKs drive out the
13483 * data unless wen have a "full" segment to send.
13485 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13486 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13488 SCTP_STAT_INCR(sctps_naglequeued);
13491 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13492 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13493 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13495 SCTP_STAT_INCR(sctps_naglesent);
13498 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13500 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13501 nagle_applies, un_sent);
13502 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13503 stcb->asoc.total_flight,
13504 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13506 if (queue_only_for_init)
13507 queue_only_for_init = 0;
13508 if ((queue_only == 0) && (nagle_applies == 0)) {
13510 * need to start chunk output
13511 * before blocking.. note that if
13512 * a lock is already applied, then
13513 * the input via the net is happening
13514 * and I don't need to start output :-D
13516 if (hold_tcblock == 0) {
13517 if (SCTP_TCB_TRYLOCK(stcb)) {
13519 sctp_chunk_output(inp,
13521 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13524 sctp_chunk_output(inp,
13526 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13528 if (hold_tcblock == 1) {
13529 SCTP_TCB_UNLOCK(stcb);
13533 SOCKBUF_LOCK(&so->so_snd);
13535 * This is a bit strange, but I think it will
13536 * work. The total_output_queue_size is locked and
13537 * protected by the TCB_LOCK, which we just released.
13538 * There is a race that can occur between releasing it
13539 * above, and me getting the socket lock, where sacks
13540 * come in but we have not put the SB_WAIT on the
13541 * so_snd buffer to get the wakeup. After the LOCK
13542 * is applied the sack_processing will also need to
13543 * LOCK the so->so_snd to do the actual sowwakeup(). So
13544 * once we have the socket buffer lock if we recheck the
13545 * size we KNOW we will get to sleep safely with the
13546 * wakeup flag in place.
13548 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13549 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13550 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13551 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13552 asoc, uio->uio_resid);
13555 stcb->block_entry = &be;
13556 error = sbwait(&so->so_snd);
13557 stcb->block_entry = NULL;
13559 if (error || so->so_error || be.error) {
13562 error = so->so_error;
13567 SOCKBUF_UNLOCK(&so->so_snd);
13570 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13571 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13572 asoc, stcb->asoc.total_output_queue_size);
13575 SOCKBUF_UNLOCK(&so->so_snd);
13576 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13580 SCTP_TCB_SEND_LOCK(stcb);
13582 if (sp->msg_is_complete == 0) {
13583 strm->last_msg_incomplete = 1;
13584 asoc->stream_locked = 1;
13585 asoc->stream_locked_on = srcv->sinfo_stream;
13587 sp->sender_all_done = 1;
13588 strm->last_msg_incomplete = 0;
13589 asoc->stream_locked = 0;
13592 SCTP_PRINTF("Huh no sp TSNH?\n");
13593 strm->last_msg_incomplete = 0;
13594 asoc->stream_locked = 0;
13596 SCTP_TCB_SEND_UNLOCK(stcb);
13597 if (uio->uio_resid == 0) {
13598 got_all_of_the_send = 1;
13601 /* We send in a 0, since we do NOT have any locks */
13602 error = sctp_msg_append(stcb, net, top, srcv, 0);
13604 if (srcv->sinfo_flags & SCTP_EOF) {
13606 * This should only happen for Panda for the mbuf
13607 * send case, which does NOT yet support EEOR mode.
13608 * Thus, we can just set this flag to do the proper
13611 got_all_of_the_send = 1;
13619 if ((srcv->sinfo_flags & SCTP_EOF) &&
13620 (got_all_of_the_send == 1) &&
13621 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE)) {
13624 SCTP_STAT_INCR(sctps_sends_with_eof);
13626 if (hold_tcblock == 0) {
13627 SCTP_TCB_LOCK(stcb);
13630 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13631 if (TAILQ_EMPTY(&asoc->send_queue) &&
13632 TAILQ_EMPTY(&asoc->sent_queue) &&
13634 if (asoc->locked_on_sending) {
13637 /* there is nothing queued to send, so I'm done... */
13638 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13639 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13640 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13641 struct sctp_nets *netp;
13643 if (stcb->asoc.alternate) {
13644 netp = stcb->asoc.alternate;
13646 netp = stcb->asoc.primary_destination;
13648 /* only send SHUTDOWN the first time through */
13649 sctp_send_shutdown(stcb, netp);
13650 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13651 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13653 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13654 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13655 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13657 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13658 asoc->primary_destination);
13662 * we still got (or just got) data to send, so set
13666 * XXX sockets draft says that SCTP_EOF should be
13667 * sent with no data. currently, we will allow user
13668 * data to be sent first and move to
13671 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13672 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13673 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13674 if (hold_tcblock == 0) {
13675 SCTP_TCB_LOCK(stcb);
13678 if (asoc->locked_on_sending) {
13679 /* Locked to send out the data */
13680 struct sctp_stream_queue_pending *sp;
13682 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13684 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13685 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13688 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13689 if (TAILQ_EMPTY(&asoc->send_queue) &&
13690 TAILQ_EMPTY(&asoc->sent_queue) &&
13691 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13693 if (free_cnt_applied) {
13694 atomic_add_int(&stcb->asoc.refcnt, -1);
13695 free_cnt_applied = 0;
13697 sctp_abort_an_association(stcb->sctp_ep, stcb,
13698 SCTP_RESPONSE_TO_USER_REQ,
13699 NULL, SCTP_SO_LOCKED);
13701 * now relock the stcb so everything
13708 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13709 asoc->primary_destination);
13710 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13715 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13716 some_on_control = 1;
13718 if (queue_only_for_init) {
13719 if (hold_tcblock == 0) {
13720 SCTP_TCB_LOCK(stcb);
13723 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13724 /* a collision took us forward? */
13727 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13728 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13732 if ((net->flight_size > net->cwnd) &&
13733 (stcb->asoc.sctp_cmt_on_off == 0)) {
13734 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13736 } else if (asoc->ifp_had_enobuf) {
13737 SCTP_STAT_INCR(sctps_ifnomemqueued);
13738 if (net->flight_size > (2 * net->mtu)) {
13741 asoc->ifp_had_enobuf = 0;
13743 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13744 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13745 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13746 (stcb->asoc.total_flight > 0) &&
13747 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13748 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13750 * Ok, Nagle is set on and we have data outstanding.
13751 * Don't send anything and let SACKs drive out the
13752 * data unless wen have a "full" segment to send.
13754 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13755 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13757 SCTP_STAT_INCR(sctps_naglequeued);
13760 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13761 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13762 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13764 SCTP_STAT_INCR(sctps_naglesent);
13767 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13768 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13769 nagle_applies, un_sent);
13770 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13771 stcb->asoc.total_flight,
13772 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13774 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13775 /* we can attempt to send too. */
13776 if (hold_tcblock == 0) {
13778 * If there is activity recv'ing sacks no need to
13781 if (SCTP_TCB_TRYLOCK(stcb)) {
13782 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13786 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13788 } else if ((queue_only == 0) &&
13789 (stcb->asoc.peers_rwnd == 0) &&
13790 (stcb->asoc.total_flight == 0)) {
13791 /* We get to have a probe outstanding */
13792 if (hold_tcblock == 0) {
13794 SCTP_TCB_LOCK(stcb);
13796 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13797 } else if (some_on_control) {
13798 int num_out, reason, frag_point;
13800 /* Here we do control only */
13801 if (hold_tcblock == 0) {
13803 SCTP_TCB_LOCK(stcb);
13805 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13806 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13807 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13809 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13810 queue_only, stcb->asoc.peers_rwnd, un_sent,
13811 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13812 stcb->asoc.total_output_queue_size, error);
13817 if (local_soresv && stcb) {
13818 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13820 if (create_lock_applied) {
13821 SCTP_ASOC_CREATE_UNLOCK(inp);
13823 if ((stcb) && hold_tcblock) {
13824 SCTP_TCB_UNLOCK(stcb);
13826 if (stcb && free_cnt_applied) {
13827 atomic_add_int(&stcb->asoc.refcnt, -1);
13831 if (mtx_owned(&stcb->tcb_mtx)) {
13832 panic("Leaving with tcb mtx owned?");
13834 if (mtx_owned(&stcb->tcb_send_mtx)) {
13835 panic("Leaving with tcb send mtx owned?");
13841 sctp_validate_no_locks(inp);
13843 printf("Warning - inp is NULL so cant validate locks\n");
13850 sctp_m_freem(control);
13857 * generate an AUTHentication chunk, if required
13860 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13861 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13862 struct sctp_tcb *stcb, uint8_t chunk)
13864 struct mbuf *m_auth;
13865 struct sctp_auth_chunk *auth;
13869 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13873 /* sysctl disabled auth? */
13874 if (SCTP_BASE_SYSCTL(sctp_auth_disable))
13877 /* peer doesn't do auth... */
13878 if (!stcb->asoc.peer_supports_auth) {
13881 /* does the requested chunk require auth? */
13882 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13885 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_DONTWAIT, 1, MT_HEADER);
13886 if (m_auth == NULL) {
13890 /* reserve some space if this will be the first mbuf */
13892 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13893 /* fill in the AUTH chunk details */
13894 auth = mtod(m_auth, struct sctp_auth_chunk *);
13895 bzero(auth, sizeof(*auth));
13896 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13897 auth->ch.chunk_flags = 0;
13898 chunk_len = sizeof(*auth) +
13899 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13900 auth->ch.chunk_length = htons(chunk_len);
13901 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13902 /* key id and hmac digest will be computed and filled in upon send */
13904 /* save the offset where the auth was inserted into the chain */
13906 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13907 *offset += SCTP_BUF_LEN(cn);
13910 /* update length and return pointer to the auth chunk */
13911 SCTP_BUF_LEN(m_auth) = chunk_len;
13912 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13913 if (auth_ret != NULL)
13921 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13923 struct nd_prefix *pfx = NULL;
13924 struct nd_pfxrouter *pfxrtr = NULL;
13925 struct sockaddr_in6 gw6;
13927 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13930 /* get prefix entry of address */
13931 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13932 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13934 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13935 &src6->sin6_addr, &pfx->ndpr_mask))
13938 /* no prefix entry in the prefix list */
13940 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13941 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13944 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13945 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13947 /* search installed gateway from prefix entry */
13948 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13949 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13950 gw6.sin6_family = AF_INET6;
13951 gw6.sin6_len = sizeof(struct sockaddr_in6);
13952 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13953 sizeof(struct in6_addr));
13954 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13955 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13956 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13957 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13958 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13959 ro->ro_rt->rt_gateway)) {
13960 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13964 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13971 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13974 struct sockaddr_in *sin, *mask;
13975 struct ifaddr *ifa;
13976 struct in_addr srcnetaddr, gwnetaddr;
13978 if (ro == NULL || ro->ro_rt == NULL ||
13979 sifa->address.sa.sa_family != AF_INET) {
13982 ifa = (struct ifaddr *)sifa->ifa;
13983 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13984 sin = (struct sockaddr_in *)&sifa->address.sin;
13985 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13986 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13987 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13988 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13990 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13991 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13992 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13993 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13995 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {