2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
38 #include <netinet/sctp_var.h>
39 #include <netinet/sctp_sysctl.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_pcb.h>
42 #include <netinet/sctputil.h>
43 #include <netinet/sctp_output.h>
44 #include <netinet/sctp_uio.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
47 #include <netinet/sctp_timer.h>
48 #include <netinet/sctp_asconf.h>
49 #include <netinet/sctp_indata.h>
50 #include <netinet/sctp_bsd_addr.h>
51 #include <netinet/sctp_input.h>
52 #include <netinet/sctp_crc32.h>
53 #if defined(INET) || defined(INET6)
54 #include <netinet/udp.h>
56 #include <netinet/udp_var.h>
57 #include <machine/in_cksum.h>
61 #define SCTP_MAX_GAPS_INARRAY 4
63 uint8_t right_edge; /* mergable on the right edge */
64 uint8_t left_edge; /* mergable on the left edge */
67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
70 struct sack_track sack_array[256] = {
71 {0, 0, 0, 0, /* 0x00 */
78 {1, 0, 1, 0, /* 0x01 */
85 {0, 0, 1, 0, /* 0x02 */
92 {1, 0, 1, 0, /* 0x03 */
99 {0, 0, 1, 0, /* 0x04 */
106 {1, 0, 2, 0, /* 0x05 */
113 {0, 0, 1, 0, /* 0x06 */
120 {1, 0, 1, 0, /* 0x07 */
127 {0, 0, 1, 0, /* 0x08 */
134 {1, 0, 2, 0, /* 0x09 */
141 {0, 0, 2, 0, /* 0x0a */
148 {1, 0, 2, 0, /* 0x0b */
155 {0, 0, 1, 0, /* 0x0c */
162 {1, 0, 2, 0, /* 0x0d */
169 {0, 0, 1, 0, /* 0x0e */
176 {1, 0, 1, 0, /* 0x0f */
183 {0, 0, 1, 0, /* 0x10 */
190 {1, 0, 2, 0, /* 0x11 */
197 {0, 0, 2, 0, /* 0x12 */
204 {1, 0, 2, 0, /* 0x13 */
211 {0, 0, 2, 0, /* 0x14 */
218 {1, 0, 3, 0, /* 0x15 */
225 {0, 0, 2, 0, /* 0x16 */
232 {1, 0, 2, 0, /* 0x17 */
239 {0, 0, 1, 0, /* 0x18 */
246 {1, 0, 2, 0, /* 0x19 */
253 {0, 0, 2, 0, /* 0x1a */
260 {1, 0, 2, 0, /* 0x1b */
267 {0, 0, 1, 0, /* 0x1c */
274 {1, 0, 2, 0, /* 0x1d */
281 {0, 0, 1, 0, /* 0x1e */
288 {1, 0, 1, 0, /* 0x1f */
295 {0, 0, 1, 0, /* 0x20 */
302 {1, 0, 2, 0, /* 0x21 */
309 {0, 0, 2, 0, /* 0x22 */
316 {1, 0, 2, 0, /* 0x23 */
323 {0, 0, 2, 0, /* 0x24 */
330 {1, 0, 3, 0, /* 0x25 */
337 {0, 0, 2, 0, /* 0x26 */
344 {1, 0, 2, 0, /* 0x27 */
351 {0, 0, 2, 0, /* 0x28 */
358 {1, 0, 3, 0, /* 0x29 */
365 {0, 0, 3, 0, /* 0x2a */
372 {1, 0, 3, 0, /* 0x2b */
379 {0, 0, 2, 0, /* 0x2c */
386 {1, 0, 3, 0, /* 0x2d */
393 {0, 0, 2, 0, /* 0x2e */
400 {1, 0, 2, 0, /* 0x2f */
407 {0, 0, 1, 0, /* 0x30 */
414 {1, 0, 2, 0, /* 0x31 */
421 {0, 0, 2, 0, /* 0x32 */
428 {1, 0, 2, 0, /* 0x33 */
435 {0, 0, 2, 0, /* 0x34 */
442 {1, 0, 3, 0, /* 0x35 */
449 {0, 0, 2, 0, /* 0x36 */
456 {1, 0, 2, 0, /* 0x37 */
463 {0, 0, 1, 0, /* 0x38 */
470 {1, 0, 2, 0, /* 0x39 */
477 {0, 0, 2, 0, /* 0x3a */
484 {1, 0, 2, 0, /* 0x3b */
491 {0, 0, 1, 0, /* 0x3c */
498 {1, 0, 2, 0, /* 0x3d */
505 {0, 0, 1, 0, /* 0x3e */
512 {1, 0, 1, 0, /* 0x3f */
519 {0, 0, 1, 0, /* 0x40 */
526 {1, 0, 2, 0, /* 0x41 */
533 {0, 0, 2, 0, /* 0x42 */
540 {1, 0, 2, 0, /* 0x43 */
547 {0, 0, 2, 0, /* 0x44 */
554 {1, 0, 3, 0, /* 0x45 */
561 {0, 0, 2, 0, /* 0x46 */
568 {1, 0, 2, 0, /* 0x47 */
575 {0, 0, 2, 0, /* 0x48 */
582 {1, 0, 3, 0, /* 0x49 */
589 {0, 0, 3, 0, /* 0x4a */
596 {1, 0, 3, 0, /* 0x4b */
603 {0, 0, 2, 0, /* 0x4c */
610 {1, 0, 3, 0, /* 0x4d */
617 {0, 0, 2, 0, /* 0x4e */
624 {1, 0, 2, 0, /* 0x4f */
631 {0, 0, 2, 0, /* 0x50 */
638 {1, 0, 3, 0, /* 0x51 */
645 {0, 0, 3, 0, /* 0x52 */
652 {1, 0, 3, 0, /* 0x53 */
659 {0, 0, 3, 0, /* 0x54 */
666 {1, 0, 4, 0, /* 0x55 */
673 {0, 0, 3, 0, /* 0x56 */
680 {1, 0, 3, 0, /* 0x57 */
687 {0, 0, 2, 0, /* 0x58 */
694 {1, 0, 3, 0, /* 0x59 */
701 {0, 0, 3, 0, /* 0x5a */
708 {1, 0, 3, 0, /* 0x5b */
715 {0, 0, 2, 0, /* 0x5c */
722 {1, 0, 3, 0, /* 0x5d */
729 {0, 0, 2, 0, /* 0x5e */
736 {1, 0, 2, 0, /* 0x5f */
743 {0, 0, 1, 0, /* 0x60 */
750 {1, 0, 2, 0, /* 0x61 */
757 {0, 0, 2, 0, /* 0x62 */
764 {1, 0, 2, 0, /* 0x63 */
771 {0, 0, 2, 0, /* 0x64 */
778 {1, 0, 3, 0, /* 0x65 */
785 {0, 0, 2, 0, /* 0x66 */
792 {1, 0, 2, 0, /* 0x67 */
799 {0, 0, 2, 0, /* 0x68 */
806 {1, 0, 3, 0, /* 0x69 */
813 {0, 0, 3, 0, /* 0x6a */
820 {1, 0, 3, 0, /* 0x6b */
827 {0, 0, 2, 0, /* 0x6c */
834 {1, 0, 3, 0, /* 0x6d */
841 {0, 0, 2, 0, /* 0x6e */
848 {1, 0, 2, 0, /* 0x6f */
855 {0, 0, 1, 0, /* 0x70 */
862 {1, 0, 2, 0, /* 0x71 */
869 {0, 0, 2, 0, /* 0x72 */
876 {1, 0, 2, 0, /* 0x73 */
883 {0, 0, 2, 0, /* 0x74 */
890 {1, 0, 3, 0, /* 0x75 */
897 {0, 0, 2, 0, /* 0x76 */
904 {1, 0, 2, 0, /* 0x77 */
911 {0, 0, 1, 0, /* 0x78 */
918 {1, 0, 2, 0, /* 0x79 */
925 {0, 0, 2, 0, /* 0x7a */
932 {1, 0, 2, 0, /* 0x7b */
939 {0, 0, 1, 0, /* 0x7c */
946 {1, 0, 2, 0, /* 0x7d */
953 {0, 0, 1, 0, /* 0x7e */
960 {1, 0, 1, 0, /* 0x7f */
967 {0, 1, 1, 0, /* 0x80 */
974 {1, 1, 2, 0, /* 0x81 */
981 {0, 1, 2, 0, /* 0x82 */
988 {1, 1, 2, 0, /* 0x83 */
995 {0, 1, 2, 0, /* 0x84 */
1002 {1, 1, 3, 0, /* 0x85 */
1009 {0, 1, 2, 0, /* 0x86 */
1016 {1, 1, 2, 0, /* 0x87 */
1023 {0, 1, 2, 0, /* 0x88 */
1030 {1, 1, 3, 0, /* 0x89 */
1037 {0, 1, 3, 0, /* 0x8a */
1044 {1, 1, 3, 0, /* 0x8b */
1051 {0, 1, 2, 0, /* 0x8c */
1058 {1, 1, 3, 0, /* 0x8d */
1065 {0, 1, 2, 0, /* 0x8e */
1072 {1, 1, 2, 0, /* 0x8f */
1079 {0, 1, 2, 0, /* 0x90 */
1086 {1, 1, 3, 0, /* 0x91 */
1093 {0, 1, 3, 0, /* 0x92 */
1100 {1, 1, 3, 0, /* 0x93 */
1107 {0, 1, 3, 0, /* 0x94 */
1114 {1, 1, 4, 0, /* 0x95 */
1121 {0, 1, 3, 0, /* 0x96 */
1128 {1, 1, 3, 0, /* 0x97 */
1135 {0, 1, 2, 0, /* 0x98 */
1142 {1, 1, 3, 0, /* 0x99 */
1149 {0, 1, 3, 0, /* 0x9a */
1156 {1, 1, 3, 0, /* 0x9b */
1163 {0, 1, 2, 0, /* 0x9c */
1170 {1, 1, 3, 0, /* 0x9d */
1177 {0, 1, 2, 0, /* 0x9e */
1184 {1, 1, 2, 0, /* 0x9f */
1191 {0, 1, 2, 0, /* 0xa0 */
1198 {1, 1, 3, 0, /* 0xa1 */
1205 {0, 1, 3, 0, /* 0xa2 */
1212 {1, 1, 3, 0, /* 0xa3 */
1219 {0, 1, 3, 0, /* 0xa4 */
1226 {1, 1, 4, 0, /* 0xa5 */
1233 {0, 1, 3, 0, /* 0xa6 */
1240 {1, 1, 3, 0, /* 0xa7 */
1247 {0, 1, 3, 0, /* 0xa8 */
1254 {1, 1, 4, 0, /* 0xa9 */
1261 {0, 1, 4, 0, /* 0xaa */
1268 {1, 1, 4, 0, /* 0xab */
1275 {0, 1, 3, 0, /* 0xac */
1282 {1, 1, 4, 0, /* 0xad */
1289 {0, 1, 3, 0, /* 0xae */
1296 {1, 1, 3, 0, /* 0xaf */
1303 {0, 1, 2, 0, /* 0xb0 */
1310 {1, 1, 3, 0, /* 0xb1 */
1317 {0, 1, 3, 0, /* 0xb2 */
1324 {1, 1, 3, 0, /* 0xb3 */
1331 {0, 1, 3, 0, /* 0xb4 */
1338 {1, 1, 4, 0, /* 0xb5 */
1345 {0, 1, 3, 0, /* 0xb6 */
1352 {1, 1, 3, 0, /* 0xb7 */
1359 {0, 1, 2, 0, /* 0xb8 */
1366 {1, 1, 3, 0, /* 0xb9 */
1373 {0, 1, 3, 0, /* 0xba */
1380 {1, 1, 3, 0, /* 0xbb */
1387 {0, 1, 2, 0, /* 0xbc */
1394 {1, 1, 3, 0, /* 0xbd */
1401 {0, 1, 2, 0, /* 0xbe */
1408 {1, 1, 2, 0, /* 0xbf */
1415 {0, 1, 1, 0, /* 0xc0 */
1422 {1, 1, 2, 0, /* 0xc1 */
1429 {0, 1, 2, 0, /* 0xc2 */
1436 {1, 1, 2, 0, /* 0xc3 */
1443 {0, 1, 2, 0, /* 0xc4 */
1450 {1, 1, 3, 0, /* 0xc5 */
1457 {0, 1, 2, 0, /* 0xc6 */
1464 {1, 1, 2, 0, /* 0xc7 */
1471 {0, 1, 2, 0, /* 0xc8 */
1478 {1, 1, 3, 0, /* 0xc9 */
1485 {0, 1, 3, 0, /* 0xca */
1492 {1, 1, 3, 0, /* 0xcb */
1499 {0, 1, 2, 0, /* 0xcc */
1506 {1, 1, 3, 0, /* 0xcd */
1513 {0, 1, 2, 0, /* 0xce */
1520 {1, 1, 2, 0, /* 0xcf */
1527 {0, 1, 2, 0, /* 0xd0 */
1534 {1, 1, 3, 0, /* 0xd1 */
1541 {0, 1, 3, 0, /* 0xd2 */
1548 {1, 1, 3, 0, /* 0xd3 */
1555 {0, 1, 3, 0, /* 0xd4 */
1562 {1, 1, 4, 0, /* 0xd5 */
1569 {0, 1, 3, 0, /* 0xd6 */
1576 {1, 1, 3, 0, /* 0xd7 */
1583 {0, 1, 2, 0, /* 0xd8 */
1590 {1, 1, 3, 0, /* 0xd9 */
1597 {0, 1, 3, 0, /* 0xda */
1604 {1, 1, 3, 0, /* 0xdb */
1611 {0, 1, 2, 0, /* 0xdc */
1618 {1, 1, 3, 0, /* 0xdd */
1625 {0, 1, 2, 0, /* 0xde */
1632 {1, 1, 2, 0, /* 0xdf */
1639 {0, 1, 1, 0, /* 0xe0 */
1646 {1, 1, 2, 0, /* 0xe1 */
1653 {0, 1, 2, 0, /* 0xe2 */
1660 {1, 1, 2, 0, /* 0xe3 */
1667 {0, 1, 2, 0, /* 0xe4 */
1674 {1, 1, 3, 0, /* 0xe5 */
1681 {0, 1, 2, 0, /* 0xe6 */
1688 {1, 1, 2, 0, /* 0xe7 */
1695 {0, 1, 2, 0, /* 0xe8 */
1702 {1, 1, 3, 0, /* 0xe9 */
1709 {0, 1, 3, 0, /* 0xea */
1716 {1, 1, 3, 0, /* 0xeb */
1723 {0, 1, 2, 0, /* 0xec */
1730 {1, 1, 3, 0, /* 0xed */
1737 {0, 1, 2, 0, /* 0xee */
1744 {1, 1, 2, 0, /* 0xef */
1751 {0, 1, 1, 0, /* 0xf0 */
1758 {1, 1, 2, 0, /* 0xf1 */
1765 {0, 1, 2, 0, /* 0xf2 */
1772 {1, 1, 2, 0, /* 0xf3 */
1779 {0, 1, 2, 0, /* 0xf4 */
1786 {1, 1, 3, 0, /* 0xf5 */
1793 {0, 1, 2, 0, /* 0xf6 */
1800 {1, 1, 2, 0, /* 0xf7 */
1807 {0, 1, 1, 0, /* 0xf8 */
1814 {1, 1, 2, 0, /* 0xf9 */
1821 {0, 1, 2, 0, /* 0xfa */
1828 {1, 1, 2, 0, /* 0xfb */
1835 {0, 1, 1, 0, /* 0xfc */
1842 {1, 1, 2, 0, /* 0xfd */
1849 {0, 1, 1, 0, /* 0xfe */
1856 {1, 1, 1, 0, /* 0xff */
1867 sctp_is_address_in_scope(struct sctp_ifa *ifa,
1868 struct sctp_scoping *scope,
1871 if ((scope->loopback_scope == 0) &&
1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
1874 * skip loopback if not in scope *
1878 switch (ifa->address.sa.sa_family) {
1881 if (scope->ipv4_addr_legal) {
1882 struct sockaddr_in *sin;
1884 sin = &ifa->address.sin;
1885 if (sin->sin_addr.s_addr == 0) {
1886 /* not in scope , unspecified */
1889 if ((scope->ipv4_local_scope == 0) &&
1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
1891 /* private address not in scope */
1901 if (scope->ipv6_addr_legal) {
1902 struct sockaddr_in6 *sin6;
1905 * Must update the flags, bummer, which means any
1906 * IFA locks must now be applied HERE <->
1909 sctp_gather_internal_ifa_flags(ifa);
1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
1914 /* ok to use deprecated addresses? */
1915 sin6 = &ifa->address.sin6;
1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1917 /* skip unspecifed addresses */
1920 if ( /* (local_scope == 0) && */
1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
1924 if ((scope->site_scope == 0) &&
1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
1939 static struct mbuf *
1940 sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
1942 #if defined(INET) || defined(INET6)
1943 struct sctp_paramhdr *parmh;
1949 switch (ifa->address.sa.sa_family) {
1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
1963 #if defined(INET) || defined(INET6)
1964 if (M_TRAILINGSPACE(m) >= plen) {
1965 /* easy side we just drop it on the end */
1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
1969 /* Need more space */
1971 while (SCTP_BUF_NEXT(mret) != NULL) {
1972 mret = SCTP_BUF_NEXT(mret);
1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
1975 if (SCTP_BUF_NEXT(mret) == NULL) {
1976 /* We are hosed, can't add more addresses */
1979 mret = SCTP_BUF_NEXT(mret);
1980 parmh = mtod(mret, struct sctp_paramhdr *);
1982 /* now add the parameter */
1983 switch (ifa->address.sa.sa_family) {
1987 struct sctp_ipv4addr_param *ipv4p;
1988 struct sockaddr_in *sin;
1990 sin = &ifa->address.sin;
1991 ipv4p = (struct sctp_ipv4addr_param *)parmh;
1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS);
1993 parmh->param_length = htons(plen);
1994 ipv4p->addr = sin->sin_addr.s_addr;
1995 SCTP_BUF_LEN(mret) += plen;
2002 struct sctp_ipv6addr_param *ipv6p;
2003 struct sockaddr_in6 *sin6;
2005 sin6 = &ifa->address.sin6;
2006 ipv6p = (struct sctp_ipv6addr_param *)parmh;
2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS);
2008 parmh->param_length = htons(plen);
2009 memcpy(ipv6p->addr, &sin6->sin6_addr,
2010 sizeof(ipv6p->addr));
2011 /* clear embedded scope in the address */
2012 in6_clearscope((struct in6_addr *)ipv6p->addr);
2013 SCTP_BUF_LEN(mret) += plen;
2029 sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
2030 struct sctp_scoping *scope,
2031 struct mbuf *m_at, int cnt_inits_to,
2032 uint16_t * padding_len, uint16_t * chunk_len)
2034 struct sctp_vrf *vrf = NULL;
2035 int cnt, limit_out = 0, total_count;
2038 vrf_id = inp->def_vrf_id;
2039 SCTP_IPI_ADDR_RLOCK();
2040 vrf = sctp_find_vrf(vrf_id);
2042 SCTP_IPI_ADDR_RUNLOCK();
2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
2046 struct sctp_ifa *sctp_ifap;
2047 struct sctp_ifn *sctp_ifnp;
2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
2052 cnt = SCTP_ADDRESS_LIMIT;
2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2056 if ((scope->loopback_scope == 0) &&
2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2059 * Skip loopback devices if loopback_scope
2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2068 &sctp_ifap->address.sin.sin_addr) != 0)) {
2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
2086 if (cnt > SCTP_ADDRESS_LIMIT) {
2090 if (cnt > SCTP_ADDRESS_LIMIT) {
2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
2099 if ((scope->loopback_scope == 0) &&
2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
2102 * Skip loopback devices if
2103 * loopback_scope not set
2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2111 &sctp_ifap->address.sin.sin_addr) != 0)) {
2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) {
2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
2125 if (sctp_is_address_in_scope(sctp_ifap,
2129 if ((chunk_len != NULL) &&
2130 (padding_len != NULL) &&
2131 (*padding_len > 0)) {
2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2133 SCTP_BUF_LEN(m_at) += *padding_len;
2134 *chunk_len += *padding_len;
2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
2148 if (total_count > SCTP_ADDRESS_LIMIT) {
2149 /* No more addresses */
2157 struct sctp_laddr *laddr;
2160 /* First, how many ? */
2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2162 if (laddr->ifa == NULL) {
2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
2167 * Address being deleted by the system, dont
2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2173 * Address being deleted on this ep don't
2178 if (sctp_is_address_in_scope(laddr->ifa,
2185 * To get through a NAT we only list addresses if we have
2186 * more than one. That way if you just bind a single address
2187 * we let the source of the init dictate our address.
2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2192 if (laddr->ifa == NULL) {
2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
2198 if (sctp_is_address_in_scope(laddr->ifa,
2202 if ((chunk_len != NULL) &&
2203 (padding_len != NULL) &&
2204 (*padding_len > 0)) {
2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
2206 SCTP_BUF_LEN(m_at) += *padding_len;
2207 *chunk_len += *padding_len;
2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
2212 if (cnt >= SCTP_ADDRESS_LIMIT) {
2218 SCTP_IPI_ADDR_RUNLOCK();
2222 static struct sctp_ifa *
2223 sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
2224 uint8_t dest_is_loop,
2225 uint8_t dest_is_priv,
2228 uint8_t dest_is_global = 0;
2230 /* dest_is_priv is true if destination is a private address */
2231 /* dest_is_loop is true if destination is a loopback addresses */
2234 * Here we determine if its a preferred address. A preferred address
2235 * means it is the same scope or higher scope then the destination.
2236 * L = loopback, P = private, G = global
2237 * -----------------------------------------
2238 * src | dest | result
2239 * ----------------------------------------
2241 * -----------------------------------------
2242 * P | L | yes-v4 no-v6
2243 * -----------------------------------------
2244 * G | L | yes-v4 no-v6
2245 * -----------------------------------------
2247 * -----------------------------------------
2249 * -----------------------------------------
2251 * -----------------------------------------
2253 * -----------------------------------------
2255 * -----------------------------------------
2257 * -----------------------------------------
2260 if (ifa->address.sa.sa_family != fam) {
2261 /* forget mis-matched family */
2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
2269 /* Ok the address may be ok */
2271 if (fam == AF_INET6) {
2272 /* ok to use deprecated addresses? no lets not! */
2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
2277 if (ifa->src_is_priv && !ifa->src_is_loop) {
2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
2283 if (ifa->src_is_glob) {
2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
2292 * Now that we know what is what, implement or table this could in
2293 * theory be done slicker (it used to be), but this is
2294 * straightforward and easier to validate :-)
2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
2299 dest_is_loop, dest_is_priv, dest_is_global);
2301 if ((ifa->src_is_loop) && (dest_is_priv)) {
2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
2305 if ((ifa->src_is_glob) && (dest_is_priv)) {
2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
2309 if ((ifa->src_is_loop) && (dest_is_global)) {
2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
2313 if ((ifa->src_is_priv) && (dest_is_global)) {
2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
2318 /* its a preferred address */
2322 static struct sctp_ifa *
2323 sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
2324 uint8_t dest_is_loop,
2325 uint8_t dest_is_priv,
2328 uint8_t dest_is_global = 0;
2331 * Here we determine if its a acceptable address. A acceptable
2332 * address means it is the same scope or higher scope but we can
2333 * allow for NAT which means its ok to have a global dest and a
2336 * L = loopback, P = private, G = global
2337 * -----------------------------------------
2338 * src | dest | result
2339 * -----------------------------------------
2341 * -----------------------------------------
2342 * P | L | yes-v4 no-v6
2343 * -----------------------------------------
2345 * -----------------------------------------
2347 * -----------------------------------------
2349 * -----------------------------------------
2350 * G | P | yes - May not work
2351 * -----------------------------------------
2353 * -----------------------------------------
2354 * P | G | yes - May not work
2355 * -----------------------------------------
2357 * -----------------------------------------
2360 if (ifa->address.sa.sa_family != fam) {
2361 /* forget non matching family */
2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
2363 ifa->address.sa.sa_family, fam);
2366 /* Ok the address may be ok */
2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
2369 dest_is_loop, dest_is_priv);
2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
2374 if (fam == AF_INET6) {
2375 /* ok to use deprecated addresses? */
2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
2379 if (ifa->src_is_priv) {
2380 /* Special case, linklocal to loop */
2387 * Now that we know what is what, implement our table. This could in
2388 * theory be done slicker (it used to be), but this is
2389 * straightforward and easier to validate :-)
2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) {
2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
2404 /* its an acceptable address */
2409 sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
2411 struct sctp_laddr *laddr;
2414 /* There are no restrictions, no TCB :-) */
2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
2418 if (laddr->ifa == NULL) {
2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2423 if (laddr->ifa == ifa) {
2424 /* Yes it is on the list */
2433 sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
2435 struct sctp_laddr *laddr;
2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
2440 if (laddr->ifa == NULL) {
2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
2445 if ((laddr->ifa == ifa) && laddr->action == 0)
2454 static struct sctp_ifa *
2455 sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
2458 int non_asoc_addr_ok,
2459 uint8_t dest_is_priv,
2460 uint8_t dest_is_loop,
2463 struct sctp_laddr *laddr, *starting_point;
2466 struct sctp_ifn *sctp_ifn;
2467 struct sctp_ifa *sctp_ifa, *sifa;
2468 struct sctp_vrf *vrf;
2471 vrf = sctp_find_vrf(vrf_id);
2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2479 * first question, is the ifn we will emit on in our list, if so, we
2480 * want such an address. Note that we first looked for a preferred
2484 /* is a preferred one on the interface we route out? */
2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2489 &sctp_ifa->address.sin.sin_addr) != 0)) {
2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2501 (non_asoc_addr_ok == 0))
2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
2508 if (sctp_is_addr_in_ep(inp, sifa)) {
2509 atomic_add_int(&sifa->refcount, 1);
2515 * ok, now we now need to find one on the list of the addresses. We
2516 * can't get one on the emitting interface so let's find first a
2517 * preferred one. If not that an acceptable one otherwise... we
2520 starting_point = inp->next_addr_touse;
2522 if (inp->next_addr_touse == NULL) {
2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2526 for (laddr = inp->next_addr_touse; laddr;
2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2528 if (laddr->ifa == NULL) {
2529 /* address has been removed */
2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2533 /* address is being deleted */
2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
2540 atomic_add_int(&sifa->refcount, 1);
2543 if (resettotop == 0) {
2544 inp->next_addr_touse = NULL;
2547 inp->next_addr_touse = starting_point;
2550 if (inp->next_addr_touse == NULL) {
2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
2554 /* ok, what about an acceptable address in the inp */
2555 for (laddr = inp->next_addr_touse; laddr;
2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2557 if (laddr->ifa == NULL) {
2558 /* address has been removed */
2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2562 /* address is being deleted */
2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2569 atomic_add_int(&sifa->refcount, 1);
2572 if (resettotop == 0) {
2573 inp->next_addr_touse = NULL;
2574 goto once_again_too;
2577 * no address bound can be a source for the destination we are in
2585 static struct sctp_ifa *
2586 sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
2587 struct sctp_tcb *stcb,
2590 uint8_t dest_is_priv,
2591 uint8_t dest_is_loop,
2592 int non_asoc_addr_ok,
2595 struct sctp_laddr *laddr, *starting_point;
2597 struct sctp_ifn *sctp_ifn;
2598 struct sctp_ifa *sctp_ifa, *sifa;
2599 uint8_t start_at_beginning = 0;
2600 struct sctp_vrf *vrf;
2604 * first question, is the ifn we will emit on in our list, if so, we
2607 vrf = sctp_find_vrf(vrf_id);
2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2616 * first question, is the ifn we will emit on in our list? If so,
2617 * we want that one. First we look for a preferred. Second, we go
2618 * for an acceptable.
2621 /* first try for a preferred address on the ep */
2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2626 &sctp_ifa->address.sin.sin_addr) != 0)) {
2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2643 if (((non_asoc_addr_ok == 0) &&
2644 (sctp_is_addr_restricted(stcb, sifa))) ||
2645 (non_asoc_addr_ok &&
2646 (sctp_is_addr_restricted(stcb, sifa)) &&
2647 (!sctp_is_addr_pending(stcb, sifa)))) {
2648 /* on the no-no list */
2651 atomic_add_int(&sifa->refcount, 1);
2655 /* next try for an acceptable address on the ep */
2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2660 &sctp_ifa->address.sin.sin_addr) != 0)) {
2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
2677 if (((non_asoc_addr_ok == 0) &&
2678 (sctp_is_addr_restricted(stcb, sifa))) ||
2679 (non_asoc_addr_ok &&
2680 (sctp_is_addr_restricted(stcb, sifa)) &&
2681 (!sctp_is_addr_pending(stcb, sifa)))) {
2682 /* on the no-no list */
2685 atomic_add_int(&sifa->refcount, 1);
2692 * if we can't find one like that then we must look at all addresses
2693 * bound to pick one at first preferable then secondly acceptable.
2695 starting_point = stcb->asoc.last_used_address;
2697 if (stcb->asoc.last_used_address == NULL) {
2698 start_at_beginning = 1;
2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2701 /* search beginning with the last used address */
2702 for (laddr = stcb->asoc.last_used_address; laddr;
2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2704 if (laddr->ifa == NULL) {
2705 /* address has been removed */
2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2709 /* address is being deleted */
2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
2715 if (((non_asoc_addr_ok == 0) &&
2716 (sctp_is_addr_restricted(stcb, sifa))) ||
2717 (non_asoc_addr_ok &&
2718 (sctp_is_addr_restricted(stcb, sifa)) &&
2719 (!sctp_is_addr_pending(stcb, sifa)))) {
2720 /* on the no-no list */
2723 stcb->asoc.last_used_address = laddr;
2724 atomic_add_int(&sifa->refcount, 1);
2727 if (start_at_beginning == 0) {
2728 stcb->asoc.last_used_address = NULL;
2729 goto sctp_from_the_top;
2731 /* now try for any higher scope than the destination */
2732 stcb->asoc.last_used_address = starting_point;
2733 start_at_beginning = 0;
2735 if (stcb->asoc.last_used_address == NULL) {
2736 start_at_beginning = 1;
2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
2739 /* search beginning with the last used address */
2740 for (laddr = stcb->asoc.last_used_address; laddr;
2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
2742 if (laddr->ifa == NULL) {
2743 /* address has been removed */
2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) {
2747 /* address is being deleted */
2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
2754 if (((non_asoc_addr_ok == 0) &&
2755 (sctp_is_addr_restricted(stcb, sifa))) ||
2756 (non_asoc_addr_ok &&
2757 (sctp_is_addr_restricted(stcb, sifa)) &&
2758 (!sctp_is_addr_pending(stcb, sifa)))) {
2759 /* on the no-no list */
2762 stcb->asoc.last_used_address = laddr;
2763 atomic_add_int(&sifa->refcount, 1);
2766 if (start_at_beginning == 0) {
2767 stcb->asoc.last_used_address = NULL;
2768 goto sctp_from_the_top2;
2773 static struct sctp_ifa *
2774 sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
2775 struct sctp_inpcb *inp,
2776 struct sctp_tcb *stcb,
2777 int non_asoc_addr_ok,
2778 uint8_t dest_is_loop,
2779 uint8_t dest_is_priv,
2785 struct sctp_ifa *ifa, *sifa;
2786 int num_eligible_addr = 0;
2789 struct sockaddr_in6 sin6, lsa6;
2791 if (fam == AF_INET6) {
2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
2793 (void)sa6_recoverscope(&sin6);
2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2798 if ((ifa->address.sa.sa_family == AF_INET) &&
2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2800 &ifa->address.sin.sin_addr) != 0)) {
2805 if ((ifa->address.sa.sa_family == AF_INET6) &&
2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2807 &ifa->address.sin6.sin6_addr) != 0)) {
2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2812 (non_asoc_addr_ok == 0))
2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2819 if (fam == AF_INET6 &&
2821 sifa->src_is_loop && sifa->src_is_priv) {
2823 * don't allow fe80::1 to be a src on loop ::1, we
2824 * don't list it to the peer so we will get an
2829 if (fam == AF_INET6 &&
2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
2833 * link-local <-> link-local must belong to the same
2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
2837 (void)sa6_recoverscope(&lsa6);
2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
2845 * Check if the IPv6 address matches to next-hop. In the
2846 * mobile case, old IPv6 address may be not deleted from the
2847 * interface. Then, the interface has previous and new
2848 * addresses. We should use one corresponding to the
2849 * next-hop. (by micchie)
2852 if (stcb && fam == AF_INET6 &&
2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
2861 /* Avoid topologically incorrect IPv4 address */
2862 if (stcb && fam == AF_INET &&
2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2873 if (((non_asoc_addr_ok == 0) &&
2874 (sctp_is_addr_restricted(stcb, sifa))) ||
2875 (non_asoc_addr_ok &&
2876 (sctp_is_addr_restricted(stcb, sifa)) &&
2877 (!sctp_is_addr_pending(stcb, sifa)))) {
2879 * It is restricted for some reason..
2880 * probably not yet added.
2885 if (num_eligible_addr >= addr_wanted) {
2888 num_eligible_addr++;
2895 sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
2896 struct sctp_inpcb *inp,
2897 struct sctp_tcb *stcb,
2898 int non_asoc_addr_ok,
2899 uint8_t dest_is_loop,
2900 uint8_t dest_is_priv,
2903 struct sctp_ifa *ifa, *sifa;
2904 int num_eligible_addr = 0;
2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
2908 if ((ifa->address.sa.sa_family == AF_INET) &&
2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
2910 &ifa->address.sin.sin_addr) != 0)) {
2915 if ((ifa->address.sa.sa_family == AF_INET6) &&
2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
2918 &ifa->address.sin6.sin6_addr) != 0)) {
2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
2923 (non_asoc_addr_ok == 0)) {
2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
2935 if (((non_asoc_addr_ok == 0) &&
2936 (sctp_is_addr_restricted(stcb, sifa))) ||
2937 (non_asoc_addr_ok &&
2938 (sctp_is_addr_restricted(stcb, sifa)) &&
2939 (!sctp_is_addr_pending(stcb, sifa)))) {
2941 * It is restricted for some reason..
2942 * probably not yet added.
2947 num_eligible_addr++;
2949 return (num_eligible_addr);
2952 static struct sctp_ifa *
2953 sctp_choose_boundall(struct sctp_inpcb *inp,
2954 struct sctp_tcb *stcb,
2955 struct sctp_nets *net,
2958 uint8_t dest_is_priv,
2959 uint8_t dest_is_loop,
2960 int non_asoc_addr_ok,
2963 int cur_addr_num = 0, num_preferred = 0;
2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
2966 struct sctp_ifa *sctp_ifa, *sifa;
2968 struct sctp_vrf *vrf;
2976 * For boundall we can use any address in the association.
2977 * If non_asoc_addr_ok is set we can use any address (at least in
2978 * theory). So we look for preferred addresses first. If we find one,
2979 * we use it. Otherwise we next try to get an address on the
2980 * interface, which we should be able to do (unless non_asoc_addr_ok
2981 * is false and we are routed out that way). In these cases where we
2982 * can't use the address of the interface we go through all the
2983 * ifn's looking for an address we can use and fill that in. Punting
2984 * means we send back address 0, which will probably cause problems
2985 * actually since then IP will fill in the address of the route ifn,
2986 * which means we probably already rejected it.. i.e. here comes an
2989 vrf = sctp_find_vrf(vrf_id);
2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
2997 if (sctp_ifn == NULL) {
2998 /* ?? We don't have this guy ?? */
2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
3000 goto bound_all_plan_b;
3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
3003 ifn_index, sctp_ifn->ifn_name);
3006 cur_addr_num = net->indx_of_eligible_next_to_use;
3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
3014 num_preferred, sctp_ifn->ifn_name);
3015 if (num_preferred == 0) {
3017 * no eligible addresses, we must use some other interface
3018 * address if we can find one.
3020 goto bound_all_plan_b;
3023 * Ok we have num_eligible_addr set with how many we can use, this
3024 * may vary from call to call due to addresses being deprecated
3027 if (cur_addr_num >= num_preferred) {
3031 * select the nth address from the list (where cur_addr_num is the
3032 * nth) and 0 is the first one, 1 is the second one etc...
3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3037 dest_is_priv, cur_addr_num, fam, ro);
3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */
3041 atomic_add_int(&sctp_ifa->refcount, 1);
3043 /* save off where the next one we will want */
3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3049 * plan_b: Look at all interfaces and find a preferred address. If
3050 * no preferred fall through to plan_c.
3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
3056 sctp_ifn->ifn_name);
3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3058 /* wrong base scope */
3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
3062 if ((sctp_ifn == looked_at) && looked_at) {
3063 /* already looked at this guy */
3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
3068 dest_is_loop, dest_is_priv, fam);
3069 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3070 "Found ifn:%p %d preferred source addresses\n",
3071 ifn, num_preferred);
3072 if (num_preferred == 0) {
3073 /* None on this interface. */
3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
3077 SCTPDBG(SCTP_DEBUG_OUTPUT2,
3078 "num preferred:%d on interface:%p cur_addr_num:%d\n",
3079 num_preferred, (void *)sctp_ifn, cur_addr_num);
3082 * Ok we have num_eligible_addr set with how many we can
3083 * use, this may vary from call to call due to addresses
3084 * being deprecated etc..
3086 if (cur_addr_num >= num_preferred) {
3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
3090 dest_is_priv, cur_addr_num, fam, ro);
3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1;
3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
3102 atomic_add_int(&sifa->refcount, 1);
3106 again_with_private_addresses_allowed:
3108 /* plan_c: do we have an acceptable address on the emit interface */
3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
3111 if (emit_ifn == NULL) {
3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3120 &sctp_ifa->address.sin.sin_addr) != 0)) {
3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3134 (non_asoc_addr_ok == 0)) {
3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
3150 if (((non_asoc_addr_ok == 0) &&
3151 (sctp_is_addr_restricted(stcb, sifa))) ||
3152 (non_asoc_addr_ok &&
3153 (sctp_is_addr_restricted(stcb, sifa)) &&
3154 (!sctp_is_addr_pending(stcb, sifa)))) {
3156 * It is restricted for some reason..
3157 * probably not yet added.
3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
3164 atomic_add_int(&sifa->refcount, 1);
3169 * plan_d: We are in trouble. No preferred address on the emit
3170 * interface. And not even a preferred address on all interfaces. Go
3171 * out and see if we can find an acceptable address somewhere
3172 * amongst all interfaces.
3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3177 /* wrong base scope */
3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3184 &sctp_ifa->address.sin.sin_addr) != 0)) {
3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3196 (non_asoc_addr_ok == 0))
3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
3208 if (((non_asoc_addr_ok == 0) &&
3209 (sctp_is_addr_restricted(stcb, sifa))) ||
3210 (non_asoc_addr_ok &&
3211 (sctp_is_addr_restricted(stcb, sifa)) &&
3212 (!sctp_is_addr_pending(stcb, sifa)))) {
3214 * It is restricted for some
3215 * reason.. probably not yet added.
3225 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
3226 stcb->asoc.scope.ipv4_local_scope = 1;
3228 goto again_with_private_addresses_allowed;
3229 } else if (retried == 1) {
3230 stcb->asoc.scope.ipv4_local_scope = 0;
3237 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
3238 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
3239 /* wrong base scope */
3242 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
3243 struct sctp_ifa *tmp_sifa;
3246 if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
3247 (prison_check_ip4(inp->ip_inp.inp.inp_cred,
3248 &sctp_ifa->address.sin.sin_addr) != 0)) {
3253 if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
3254 (prison_check_ip6(inp->ip_inp.inp.inp_cred,
3255 &sctp_ifa->address.sin6.sin6_addr) != 0)) {
3259 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
3260 (non_asoc_addr_ok == 0))
3262 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
3265 if (tmp_sifa == NULL) {
3268 if (tmp_sifa == sifa) {
3272 if (sctp_is_address_in_scope(tmp_sifa,
3273 &stcb->asoc.scope, 0) == 0) {
3276 if (((non_asoc_addr_ok == 0) &&
3277 (sctp_is_addr_restricted(stcb, tmp_sifa))) ||
3278 (non_asoc_addr_ok &&
3279 (sctp_is_addr_restricted(stcb, tmp_sifa)) &&
3280 (!sctp_is_addr_pending(stcb, tmp_sifa)))) {
3290 if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
3291 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
3292 sctp_add_local_addr_restricted(stcb, tmp_sifa);
3297 atomic_add_int(&sifa->refcount, 1);
3305 /* tcb may be NULL */
3307 sctp_source_address_selection(struct sctp_inpcb *inp,
3308 struct sctp_tcb *stcb,
3310 struct sctp_nets *net,
3311 int non_asoc_addr_ok, uint32_t vrf_id)
3313 struct sctp_ifa *answer;
3314 uint8_t dest_is_priv, dest_is_loop;
3318 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
3322 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
3327 * Rules: - Find the route if needed, cache if I can. - Look at
3328 * interface address in route, Is it in the bound list. If so we
3329 * have the best source. - If not we must rotate amongst the
3334 * Do we need to pay attention to scope. We can have a private address
3335 * or a global address we are sourcing or sending to. So if we draw
3337 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3339 * ------------------------------------------
3340 * source * dest * result
3341 * -----------------------------------------
3342 * <a> Private * Global * NAT
3343 * -----------------------------------------
3344 * <b> Private * Private * No problem
3345 * -----------------------------------------
3346 * <c> Global * Private * Huh, How will this work?
3347 * -----------------------------------------
3348 * <d> Global * Global * No Problem
3349 *------------------------------------------
3350 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3352 *------------------------------------------
3353 * source * dest * result
3354 * -----------------------------------------
3355 * <a> Linklocal * Global *
3356 * -----------------------------------------
3357 * <b> Linklocal * Linklocal * No problem
3358 * -----------------------------------------
3359 * <c> Global * Linklocal * Huh, How will this work?
3360 * -----------------------------------------
3361 * <d> Global * Global * No Problem
3362 *------------------------------------------
3363 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
3365 * And then we add to that what happens if there are multiple addresses
3366 * assigned to an interface. Remember the ifa on a ifn is a linked
3367 * list of addresses. So one interface can have more than one IP
3368 * address. What happens if we have both a private and a global
3369 * address? Do we then use context of destination to sort out which
3370 * one is best? And what about NAT's sending P->G may get you a NAT
3371 * translation, or should you select the G thats on the interface in
3376 * - count the number of addresses on the interface.
3377 * - if it is one, no problem except case <c>.
3378 * For <a> we will assume a NAT out there.
3379 * - if there are more than one, then we need to worry about scope P
3380 * or G. We should prefer G -> G and P -> P if possible.
3381 * Then as a secondary fall back to mixed types G->P being a last
3383 * - The above all works for bound all, but bound specific we need to
3384 * use the same concept but instead only consider the bound
3385 * addresses. If the bound set is NOT assigned to the interface then
3386 * we must use rotation amongst the bound addresses..
3388 if (ro->ro_rt == NULL) {
3390 * Need a route to cache.
3392 SCTP_RTALLOC(ro, vrf_id);
3394 if (ro->ro_rt == NULL) {
3397 fam = ro->ro_dst.sa_family;
3398 dest_is_priv = dest_is_loop = 0;
3399 /* Setup our scopes for the destination */
3403 /* Scope based on outbound address */
3404 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
3407 /* mark it as local */
3408 net->addr_is_local = 1;
3410 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
3417 /* Scope based on outbound address */
3418 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
3419 SCTP_ROUTE_IS_REAL_LOOP(ro)) {
3421 * If the address is a loopback address, which
3422 * consists of "::1" OR "fe80::1%lo0", we are
3423 * loopback scope. But we don't use dest_is_priv
3424 * (link local addresses).
3428 /* mark it as local */
3429 net->addr_is_local = 1;
3431 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
3437 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
3438 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
3439 SCTP_IPI_ADDR_RLOCK();
3440 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
3444 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
3445 dest_is_priv, dest_is_loop,
3446 non_asoc_addr_ok, fam);
3447 SCTP_IPI_ADDR_RUNLOCK();
3454 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
3455 vrf_id, dest_is_priv,
3457 non_asoc_addr_ok, fam);
3459 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
3464 SCTP_IPI_ADDR_RUNLOCK();
3469 sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
3472 int tlen, at, found;
3473 struct sctp_sndinfo sndinfo;
3474 struct sctp_prinfo prinfo;
3475 struct sctp_authinfo authinfo;
3477 tlen = SCTP_BUF_LEN(control);
3481 * Independent of how many mbufs, find the c_type inside the control
3482 * structure and copy out the data.
3485 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3486 /* There is not enough room for one more. */
3489 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3490 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3491 /* We dont't have a complete CMSG header. */
3494 if (((int)cmh.cmsg_len + at) > tlen) {
3495 /* We don't have the complete CMSG. */
3498 if ((cmh.cmsg_level == IPPROTO_SCTP) &&
3499 ((c_type == cmh.cmsg_type) ||
3500 ((c_type == SCTP_SNDRCV) &&
3501 ((cmh.cmsg_type == SCTP_SNDINFO) ||
3502 (cmh.cmsg_type == SCTP_PRINFO) ||
3503 (cmh.cmsg_type == SCTP_AUTHINFO))))) {
3504 if (c_type == cmh.cmsg_type) {
3505 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
3508 /* It is exactly what we want. Copy it out. */
3509 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
3512 struct sctp_sndrcvinfo *sndrcvinfo;
3514 sndrcvinfo = (struct sctp_sndrcvinfo *)data;
3516 if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
3519 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
3521 switch (cmh.cmsg_type) {
3523 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
3526 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
3527 sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
3528 sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
3529 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
3530 sndrcvinfo->sinfo_context = sndinfo.snd_context;
3531 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
3534 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
3537 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
3538 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
3539 sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
3541 sndrcvinfo->sinfo_timetolive = 0;
3543 sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
3546 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
3549 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
3550 sndrcvinfo->sinfo_keynumber_valid = 1;
3551 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
3559 at += CMSG_ALIGN(cmh.cmsg_len);
3565 sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
3569 struct sctp_initmsg initmsg;
3572 struct sockaddr_in sin;
3576 struct sockaddr_in6 sin6;
3580 tlen = SCTP_BUF_LEN(control);
3583 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3584 /* There is not enough room for one more. */
3588 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3589 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3590 /* We dont't have a complete CMSG header. */
3594 if (((int)cmh.cmsg_len + at) > tlen) {
3595 /* We don't have the complete CMSG. */
3599 if (cmh.cmsg_level == IPPROTO_SCTP) {
3600 switch (cmh.cmsg_type) {
3602 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
3606 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
3607 if (initmsg.sinit_max_attempts)
3608 stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
3609 if (initmsg.sinit_num_ostreams)
3610 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
3611 if (initmsg.sinit_max_instreams)
3612 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
3613 if (initmsg.sinit_max_init_timeo)
3614 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
3615 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
3616 struct sctp_stream_out *tmp_str;
3619 #if defined(SCTP_DETAILED_STR_STATS)
3624 /* Default is NOT correct */
3625 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
3626 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
3627 SCTP_TCB_UNLOCK(stcb);
3628 SCTP_MALLOC(tmp_str,
3629 struct sctp_stream_out *,
3630 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
3632 SCTP_TCB_LOCK(stcb);
3633 if (tmp_str != NULL) {
3634 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
3635 stcb->asoc.strmout = tmp_str;
3636 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
3638 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
3640 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
3641 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
3642 stcb->asoc.strmout[i].chunks_on_queues = 0;
3643 stcb->asoc.strmout[i].next_sequence_send = 0;
3644 #if defined(SCTP_DETAILED_STR_STATS)
3645 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
3646 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
3647 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
3650 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
3651 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
3653 stcb->asoc.strmout[i].stream_no = i;
3654 stcb->asoc.strmout[i].last_msg_incomplete = 0;
3655 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
3660 case SCTP_DSTADDRV4:
3661 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3665 memset(&sin, 0, sizeof(struct sockaddr_in));
3666 sin.sin_family = AF_INET;
3667 sin.sin_len = sizeof(struct sockaddr_in);
3668 sin.sin_port = stcb->rport;
3669 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3670 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3671 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3672 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3676 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3677 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3684 case SCTP_DSTADDRV6:
3685 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3689 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3690 sin6.sin6_family = AF_INET6;
3691 sin6.sin6_len = sizeof(struct sockaddr_in6);
3692 sin6.sin6_port = stcb->rport;
3693 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3694 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
3695 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
3700 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3701 in6_sin6_2_sin(&sin, &sin6);
3702 if ((sin.sin_addr.s_addr == INADDR_ANY) ||
3703 (sin.sin_addr.s_addr == INADDR_BROADCAST) ||
3704 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
3708 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
3709 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3715 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
3716 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
3726 at += CMSG_ALIGN(cmh.cmsg_len);
3731 static struct sctp_tcb *
3732 sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
3734 struct mbuf *control,
3735 struct sctp_nets **net_p,
3740 struct sctp_tcb *stcb;
3741 struct sockaddr *addr;
3744 struct sockaddr_in sin;
3748 struct sockaddr_in6 sin6;
3752 tlen = SCTP_BUF_LEN(control);
3755 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
3756 /* There is not enough room for one more. */
3760 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
3761 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
3762 /* We dont't have a complete CMSG header. */
3766 if (((int)cmh.cmsg_len + at) > tlen) {
3767 /* We don't have the complete CMSG. */
3771 if (cmh.cmsg_level == IPPROTO_SCTP) {
3772 switch (cmh.cmsg_type) {
3774 case SCTP_DSTADDRV4:
3775 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
3779 memset(&sin, 0, sizeof(struct sockaddr_in));
3780 sin.sin_family = AF_INET;
3781 sin.sin_len = sizeof(struct sockaddr_in);
3782 sin.sin_port = port;
3783 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
3784 addr = (struct sockaddr *)&sin;
3788 case SCTP_DSTADDRV6:
3789 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
3793 memset(&sin6, 0, sizeof(struct sockaddr_in6));
3794 sin6.sin6_family = AF_INET6;
3795 sin6.sin6_len = sizeof(struct sockaddr_in6);
3796 sin6.sin6_port = port;
3797 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
3799 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
3800 in6_sin6_2_sin(&sin, &sin6);
3801 addr = (struct sockaddr *)&sin;
3804 addr = (struct sockaddr *)&sin6;
3812 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
3818 at += CMSG_ALIGN(cmh.cmsg_len);
3823 static struct mbuf *
3824 sctp_add_cookie(struct mbuf *init, int init_offset,
3825 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
3827 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
3828 struct sctp_state_cookie *stc;
3829 struct sctp_paramhdr *ph;
3834 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
3835 sizeof(struct sctp_paramhdr)), 0,
3836 M_NOWAIT, 1, MT_DATA);
3840 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
3841 if (copy_init == NULL) {
3845 #ifdef SCTP_MBUF_LOGGING
3846 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3847 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
3850 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
3852 if (copy_initack == NULL) {
3854 sctp_m_freem(copy_init);
3857 #ifdef SCTP_MBUF_LOGGING
3858 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
3859 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
3862 /* easy side we just drop it on the end */
3863 ph = mtod(mret, struct sctp_paramhdr *);
3864 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
3865 sizeof(struct sctp_paramhdr);
3866 stc = (struct sctp_state_cookie *)((caddr_t)ph +
3867 sizeof(struct sctp_paramhdr));
3868 ph->param_type = htons(SCTP_STATE_COOKIE);
3869 ph->param_length = 0; /* fill in at the end */
3870 /* Fill in the stc cookie data */
3871 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
3873 /* tack the INIT and then the INIT-ACK onto the chain */
3875 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3876 cookie_sz += SCTP_BUF_LEN(m_at);
3877 if (SCTP_BUF_NEXT(m_at) == NULL) {
3878 SCTP_BUF_NEXT(m_at) = copy_init;
3882 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3883 cookie_sz += SCTP_BUF_LEN(m_at);
3884 if (SCTP_BUF_NEXT(m_at) == NULL) {
3885 SCTP_BUF_NEXT(m_at) = copy_initack;
3889 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
3890 cookie_sz += SCTP_BUF_LEN(m_at);
3891 if (SCTP_BUF_NEXT(m_at) == NULL) {
3895 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
3897 /* no space, so free the entire chain */
3901 SCTP_BUF_LEN(sig) = 0;
3902 SCTP_BUF_NEXT(m_at) = sig;
3904 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
3905 memset(foo, 0, SCTP_SIGNATURE_SIZE);
3907 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
3908 cookie_sz += SCTP_SIGNATURE_SIZE;
3909 ph->param_length = htons(cookie_sz);
3915 sctp_get_ect(struct sctp_tcb *stcb)
3917 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
3918 return (SCTP_ECT0_BIT);
3924 #if defined(INET) || defined(INET6)
3926 sctp_handle_no_route(struct sctp_tcb *stcb,
3927 struct sctp_nets *net,
3930 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
3934 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
3935 if (net->dest_state & SCTP_ADDR_CONFIRMED) {
3936 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
3937 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
3938 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
3942 net->dest_state &= ~SCTP_ADDR_REACHABLE;
3943 net->dest_state &= ~SCTP_ADDR_PF;
3947 if (net == stcb->asoc.primary_destination) {
3948 /* need a new primary */
3949 struct sctp_nets *alt;
3951 alt = sctp_find_alternate_net(stcb, net, 0);
3953 if (stcb->asoc.alternate) {
3954 sctp_free_remote_addr(stcb->asoc.alternate);
3956 stcb->asoc.alternate = alt;
3957 atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
3958 if (net->ro._s_addr) {
3959 sctp_free_ifa(net->ro._s_addr);
3960 net->ro._s_addr = NULL;
3962 net->src_addr_selected = 0;
3972 sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
3973 struct sctp_tcb *stcb, /* may be NULL */
3974 struct sctp_nets *net,
3975 struct sockaddr *to,
3977 uint32_t auth_offset,
3978 struct sctp_auth_chunk *auth,
3979 uint16_t auth_keyid,
3980 int nofragment_flag,
3987 union sctp_sockstore *over_addr,
3988 uint8_t mflowtype, uint32_t mflowid,
3989 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
3990 int so_locked SCTP_UNUSED
3995 /* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
3998 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
3999 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
4000 * - fill in the HMAC digest of any AUTH chunk in the packet.
4001 * - calculate and fill in the SCTP checksum.
4002 * - prepend an IP address header.
4003 * - if boundall use INADDR_ANY.
4004 * - if boundspecific do source address selection.
4005 * - set fragmentation option for ipV4.
4006 * - On return from IP output, check/adjust mtu size of output
4007 * interface and smallest_mtu size as well.
4009 /* Will need ifdefs around this */
4011 struct sctphdr *sctphdr;
4015 #if defined(INET) || defined(INET6)
4019 #if defined(INET) || defined(INET6)
4021 sctp_route_t *ro = NULL;
4022 struct udphdr *udp = NULL;
4027 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4028 struct socket *so = NULL;
4032 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
4033 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4037 #if defined(INET) || defined(INET6)
4039 vrf_id = stcb->asoc.vrf_id;
4041 vrf_id = inp->def_vrf_id;
4044 /* fill in the HMAC digest for any AUTH chunk in the packet */
4045 if ((auth != NULL) && (stcb != NULL)) {
4046 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
4049 tos_value = net->dscp;
4051 tos_value = stcb->asoc.default_dscp;
4053 tos_value = inp->sctp_ep.default_dscp;
4056 switch (to->sa_family) {
4060 struct ip *ip = NULL;
4061 sctp_route_t iproute;
4064 len = SCTP_MIN_V4_OVERHEAD;
4066 len += sizeof(struct udphdr);
4068 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4071 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4074 SCTP_ALIGN_TO_END(newm, len);
4075 SCTP_BUF_LEN(newm) = len;
4076 SCTP_BUF_NEXT(newm) = m;
4079 m->m_pkthdr.flowid = net->flowid;
4080 M_HASHTYPE_SET(m, net->flowtype);
4082 m->m_pkthdr.flowid = mflowid;
4083 M_HASHTYPE_SET(m, mflowtype);
4085 packet_length = sctp_calculate_len(m);
4086 ip = mtod(m, struct ip *);
4087 ip->ip_v = IPVERSION;
4088 ip->ip_hl = (sizeof(struct ip) >> 2);
4089 if (tos_value == 0) {
4091 * This means especially, that it is not set
4092 * at the SCTP layer. So use the value from
4095 tos_value = inp->ip_inp.inp.inp_ip_tos;
4099 tos_value |= sctp_get_ect(stcb);
4101 if ((nofragment_flag) && (port == 0)) {
4102 ip->ip_off = htons(IP_DF);
4104 ip->ip_off = htons(0);
4106 /* FreeBSD has a function for ip_id's */
4109 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
4110 ip->ip_len = htons(packet_length);
4111 ip->ip_tos = tos_value;
4113 ip->ip_p = IPPROTO_UDP;
4115 ip->ip_p = IPPROTO_SCTP;
4120 memset(&iproute, 0, sizeof(iproute));
4121 memcpy(&ro->ro_dst, to, to->sa_len);
4123 ro = (sctp_route_t *) & net->ro;
4125 /* Now the address selection part */
4126 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
4128 /* call the routine to select the src address */
4129 if (net && out_of_asoc_ok == 0) {
4130 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4131 sctp_free_ifa(net->ro._s_addr);
4132 net->ro._s_addr = NULL;
4133 net->src_addr_selected = 0;
4139 if (net->src_addr_selected == 0) {
4140 /* Cache the source address */
4141 net->ro._s_addr = sctp_source_address_selection(inp, stcb,
4144 net->src_addr_selected = 1;
4146 if (net->ro._s_addr == NULL) {
4147 /* No route to host */
4148 net->src_addr_selected = 0;
4149 sctp_handle_no_route(stcb, net, so_locked);
4150 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4152 return (EHOSTUNREACH);
4154 ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
4156 if (over_addr == NULL) {
4157 struct sctp_ifa *_lsrc;
4159 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4163 if (_lsrc == NULL) {
4164 sctp_handle_no_route(stcb, net, so_locked);
4165 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4167 return (EHOSTUNREACH);
4169 ip->ip_src = _lsrc->address.sin.sin_addr;
4170 sctp_free_ifa(_lsrc);
4172 ip->ip_src = over_addr->sin.sin_addr;
4173 SCTP_RTALLOC(ro, vrf_id);
4177 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4178 sctp_handle_no_route(stcb, net, so_locked);
4179 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4181 return (EHOSTUNREACH);
4183 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
4184 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4185 udp->uh_dport = port;
4186 udp->uh_ulen = htons(packet_length - sizeof(struct ip));
4188 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
4192 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4194 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
4197 sctphdr->src_port = src_port;
4198 sctphdr->dest_port = dest_port;
4199 sctphdr->v_tag = v_tag;
4200 sctphdr->checksum = 0;
4203 * If source address selection fails and we find no
4204 * route then the ip_output should fail as well with
4205 * a NO_ROUTE_TO_HOST type error. We probably should
4206 * catch that somewhere and abort the association
4207 * right away (assuming this is an INIT being sent).
4209 if (ro->ro_rt == NULL) {
4211 * src addr selection failed to find a route
4212 * (or valid source addr), so we can't get
4213 * there from here (yet)!
4215 sctp_handle_no_route(stcb, net, so_locked);
4216 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4218 return (EHOSTUNREACH);
4220 if (ro != &iproute) {
4221 memcpy(&iproute, ro, sizeof(*ro));
4223 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
4224 (uint32_t) (ntohl(ip->ip_src.s_addr)));
4225 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
4226 (uint32_t) (ntohl(ip->ip_dst.s_addr)));
4227 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
4230 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4231 /* failed to prepend data, give up */
4232 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4236 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4238 #if defined(SCTP_WITH_NO_CSUM)
4239 SCTP_STAT_INCR(sctps_sendnocrc);
4241 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
4242 SCTP_STAT_INCR(sctps_sendswcrc);
4245 SCTP_ENABLE_UDP_CSUM(o_pak);
4248 #if defined(SCTP_WITH_NO_CSUM)
4249 SCTP_STAT_INCR(sctps_sendnocrc);
4251 m->m_pkthdr.csum_flags = CSUM_SCTP;
4252 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4253 SCTP_STAT_INCR(sctps_sendhwcrc);
4256 #ifdef SCTP_PACKET_LOGGING
4257 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4258 sctp_packet_log(o_pak);
4260 /* send it out. table id is taken from stcb */
4261 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4262 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4263 so = SCTP_INP_SO(inp);
4264 SCTP_SOCKET_UNLOCK(so, 0);
4267 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
4268 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4269 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4270 atomic_add_int(&stcb->asoc.refcnt, 1);
4271 SCTP_TCB_UNLOCK(stcb);
4272 SCTP_SOCKET_LOCK(so, 0);
4273 SCTP_TCB_LOCK(stcb);
4274 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4277 SCTP_STAT_INCR(sctps_sendpackets);
4278 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4280 SCTP_STAT_INCR(sctps_senderrors);
4282 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
4284 /* free tempy routes */
4288 * PMTU check versus smallest asoc MTU goes
4291 if ((ro->ro_rt != NULL) &&
4292 (net->ro._s_addr)) {
4295 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4297 mtu -= sizeof(struct udphdr);
4299 if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
4300 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4303 } else if (ro->ro_rt == NULL) {
4304 /* route was freed */
4305 if (net->ro._s_addr &&
4306 net->src_addr_selected) {
4307 sctp_free_ifa(net->ro._s_addr);
4308 net->ro._s_addr = NULL;
4310 net->src_addr_selected = 0;
4319 uint32_t flowlabel, flowinfo;
4320 struct ip6_hdr *ip6h;
4321 struct route_in6 ip6route;
4323 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
4325 struct sockaddr_in6 lsa6_storage;
4327 u_short prev_port = 0;
4331 flowlabel = net->flowlabel;
4333 flowlabel = stcb->asoc.default_flowlabel;
4335 flowlabel = inp->sctp_ep.default_flowlabel;
4337 if (flowlabel == 0) {
4339 * This means especially, that it is not set
4340 * at the SCTP layer. So use the value from
4343 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
4345 flowlabel &= 0x000fffff;
4346 len = SCTP_MIN_OVERHEAD;
4348 len += sizeof(struct udphdr);
4350 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
4353 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4356 SCTP_ALIGN_TO_END(newm, len);
4357 SCTP_BUF_LEN(newm) = len;
4358 SCTP_BUF_NEXT(newm) = m;
4361 m->m_pkthdr.flowid = net->flowid;
4362 M_HASHTYPE_SET(m, net->flowtype);
4364 m->m_pkthdr.flowid = mflowid;
4365 M_HASHTYPE_SET(m, mflowtype);
4367 packet_length = sctp_calculate_len(m);
4369 ip6h = mtod(m, struct ip6_hdr *);
4370 /* protect *sin6 from overwrite */
4371 sin6 = (struct sockaddr_in6 *)to;
4375 /* KAME hack: embed scopeid */
4376 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4377 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4381 memset(&ip6route, 0, sizeof(ip6route));
4382 ro = (sctp_route_t *) & ip6route;
4383 memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
4385 ro = (sctp_route_t *) & net->ro;
4388 * We assume here that inp_flow is in host byte
4389 * order within the TCB!
4391 if (tos_value == 0) {
4393 * This means especially, that it is not set
4394 * at the SCTP layer. So use the value from
4397 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
4401 tos_value |= sctp_get_ect(stcb);
4405 flowinfo |= tos_value;
4407 flowinfo |= flowlabel;
4408 ip6h->ip6_flow = htonl(flowinfo);
4410 ip6h->ip6_nxt = IPPROTO_UDP;
4412 ip6h->ip6_nxt = IPPROTO_SCTP;
4414 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
4415 ip6h->ip6_dst = sin6->sin6_addr;
4418 * Add SRC address selection here: we can only reuse
4419 * to a limited degree the kame src-addr-sel, since
4420 * we can try their selection but it may not be
4423 bzero(&lsa6_tmp, sizeof(lsa6_tmp));
4424 lsa6_tmp.sin6_family = AF_INET6;
4425 lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
4427 if (net && out_of_asoc_ok == 0) {
4428 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
4429 sctp_free_ifa(net->ro._s_addr);
4430 net->ro._s_addr = NULL;
4431 net->src_addr_selected = 0;
4437 if (net->src_addr_selected == 0) {
4438 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4439 /* KAME hack: embed scopeid */
4440 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4441 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4444 /* Cache the source address */
4445 net->ro._s_addr = sctp_source_address_selection(inp,
4451 (void)sa6_recoverscope(sin6);
4452 net->src_addr_selected = 1;
4454 if (net->ro._s_addr == NULL) {
4455 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
4456 net->src_addr_selected = 0;
4457 sctp_handle_no_route(stcb, net, so_locked);
4458 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4460 return (EHOSTUNREACH);
4462 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
4464 sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
4465 /* KAME hack: embed scopeid */
4466 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
4467 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
4470 if (over_addr == NULL) {
4471 struct sctp_ifa *_lsrc;
4473 _lsrc = sctp_source_address_selection(inp, stcb, ro,
4477 if (_lsrc == NULL) {
4478 sctp_handle_no_route(stcb, net, so_locked);
4479 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4481 return (EHOSTUNREACH);
4483 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
4484 sctp_free_ifa(_lsrc);
4486 lsa6->sin6_addr = over_addr->sin6.sin6_addr;
4487 SCTP_RTALLOC(ro, vrf_id);
4489 (void)sa6_recoverscope(sin6);
4491 lsa6->sin6_port = inp->sctp_lport;
4493 if (ro->ro_rt == NULL) {
4495 * src addr selection failed to find a route
4496 * (or valid source addr), so we can't get
4499 sctp_handle_no_route(stcb, net, so_locked);
4500 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4502 return (EHOSTUNREACH);
4505 * XXX: sa6 may not have a valid sin6_scope_id in
4506 * the non-SCOPEDROUTING case.
4508 bzero(&lsa6_storage, sizeof(lsa6_storage));
4509 lsa6_storage.sin6_family = AF_INET6;
4510 lsa6_storage.sin6_len = sizeof(lsa6_storage);
4511 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4512 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
4513 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
4518 lsa6_storage.sin6_addr = lsa6->sin6_addr;
4519 lsa6_storage.sin6_port = inp->sctp_lport;
4520 lsa6 = &lsa6_storage;
4521 ip6h->ip6_src = lsa6->sin6_addr;
4524 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
4525 sctp_handle_no_route(stcb, net, so_locked);
4526 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
4528 return (EHOSTUNREACH);
4530 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4531 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
4532 udp->uh_dport = port;
4533 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
4535 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
4537 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
4540 sctphdr->src_port = src_port;
4541 sctphdr->dest_port = dest_port;
4542 sctphdr->v_tag = v_tag;
4543 sctphdr->checksum = 0;
4546 * We set the hop limit now since there is a good
4547 * chance that our ro pointer is now filled
4549 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
4550 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
4553 /* Copy to be sure something bad is not happening */
4554 sin6->sin6_addr = ip6h->ip6_dst;
4555 lsa6->sin6_addr = ip6h->ip6_src;
4558 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
4559 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
4560 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
4562 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
4564 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4566 * preserve the port and scope for link
4569 prev_scope = sin6->sin6_scope_id;
4570 prev_port = sin6->sin6_port;
4572 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
4573 /* failed to prepend data, give up */
4575 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
4578 SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
4580 #if defined(SCTP_WITH_NO_CSUM)
4581 SCTP_STAT_INCR(sctps_sendnocrc);
4583 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
4584 SCTP_STAT_INCR(sctps_sendswcrc);
4586 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
4587 udp->uh_sum = 0xffff;
4590 #if defined(SCTP_WITH_NO_CSUM)
4591 SCTP_STAT_INCR(sctps_sendnocrc);
4593 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
4594 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
4595 SCTP_STAT_INCR(sctps_sendhwcrc);
4598 /* send it out. table id is taken from stcb */
4599 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4600 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4601 so = SCTP_INP_SO(inp);
4602 SCTP_SOCKET_UNLOCK(so, 0);
4605 #ifdef SCTP_PACKET_LOGGING
4606 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
4607 sctp_packet_log(o_pak);
4609 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
4610 #if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
4611 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
4612 atomic_add_int(&stcb->asoc.refcnt, 1);
4613 SCTP_TCB_UNLOCK(stcb);
4614 SCTP_SOCKET_LOCK(so, 0);
4615 SCTP_TCB_LOCK(stcb);
4616 atomic_subtract_int(&stcb->asoc.refcnt, 1);
4620 /* for link local this must be done */
4621 sin6->sin6_scope_id = prev_scope;
4622 sin6->sin6_port = prev_port;
4624 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
4625 SCTP_STAT_INCR(sctps_sendpackets);
4626 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
4628 SCTP_STAT_INCR(sctps_senderrors);
4631 /* Now if we had a temp route free it */
4635 * PMTU check versus smallest asoc MTU goes
4638 if (ro->ro_rt == NULL) {
4639 /* Route was freed */
4640 if (net->ro._s_addr &&
4641 net->src_addr_selected) {
4642 sctp_free_ifa(net->ro._s_addr);
4643 net->ro._s_addr = NULL;
4645 net->src_addr_selected = 0;
4647 if ((ro->ro_rt != NULL) &&
4648 (net->ro._s_addr)) {
4651 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
4653 (stcb->asoc.smallest_mtu > mtu)) {
4654 sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
4657 net->mtu -= sizeof(struct udphdr);
4661 if (ND_IFINFO(ifp)->linkmtu &&
4662 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
4663 sctp_mtu_size_reset(inp,
4665 ND_IFINFO(ifp)->linkmtu);
4673 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
4674 ((struct sockaddr *)to)->sa_family);
4676 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
4683 sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
4684 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
4689 struct mbuf *m, *m_last;
4690 struct sctp_nets *net;
4691 struct sctp_init_chunk *init;
4692 struct sctp_supported_addr_param *sup_addr;
4693 struct sctp_adaptation_layer_indication *ali;
4694 struct sctp_supported_chunk_types_param *pr_supported;
4695 struct sctp_paramhdr *ph;
4696 int cnt_inits_to = 0;
4698 uint16_t num_ext, chunk_len, padding_len, parameter_len;
4700 /* INIT's always go to the primary (and usually ONLY address) */
4701 net = stcb->asoc.primary_destination;
4703 net = TAILQ_FIRST(&stcb->asoc.nets);
4708 /* we confirm any address we send an INIT to */
4709 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4710 (void)sctp_set_primary_addr(stcb, NULL, net);
4712 /* we confirm any address we send an INIT to */
4713 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
4715 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
4717 if (net->ro._l_addr.sa.sa_family == AF_INET6) {
4719 * special hook, if we are sending to link local it will not
4720 * show up in our private address count.
4722 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
4726 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
4727 /* This case should not happen */
4728 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
4731 /* start the INIT timer */
4732 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
4734 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
4736 /* No memory, INIT timer will re-attempt. */
4737 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
4740 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
4742 /* Now lets put the chunk header in place */
4743 init = mtod(m, struct sctp_init_chunk *);
4744 /* now the chunk header */
4745 init->ch.chunk_type = SCTP_INITIATION;
4746 init->ch.chunk_flags = 0;
4747 /* fill in later from mbuf we build */
4748 init->ch.chunk_length = 0;
4749 /* place in my tag */
4750 init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
4751 /* set up some of the credits. */
4752 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
4753 SCTP_MINIMAL_RWND));
4754 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
4755 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
4756 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
4758 /* Adaptation layer indication parameter */
4759 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
4760 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
4761 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
4762 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
4763 ali->ph.param_length = htons(parameter_len);
4764 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
4765 chunk_len += parameter_len;
4768 if (stcb->asoc.ecn_supported == 1) {
4769 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4770 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4771 ph->param_type = htons(SCTP_ECN_CAPABLE);
4772 ph->param_length = htons(parameter_len);
4773 chunk_len += parameter_len;
4775 /* PR-SCTP supported parameter */
4776 if (stcb->asoc.prsctp_supported == 1) {
4777 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4778 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4779 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
4780 ph->param_length = htons(parameter_len);
4781 chunk_len += parameter_len;
4783 /* Add NAT friendly parameter. */
4784 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
4785 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4786 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
4787 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
4788 ph->param_length = htons(parameter_len);
4789 chunk_len += parameter_len;
4791 /* And now tell the peer which extensions we support */
4793 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
4794 if (stcb->asoc.prsctp_supported == 1) {
4795 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
4797 if (stcb->asoc.auth_supported == 1) {
4798 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
4800 if (stcb->asoc.asconf_supported == 1) {
4801 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
4802 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
4804 if (stcb->asoc.reconfig_supported == 1) {
4805 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
4807 if (stcb->asoc.nrsack_supported == 1) {
4808 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
4810 if (stcb->asoc.pktdrop_supported == 1) {
4811 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
4814 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
4815 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
4816 pr_supported->ph.param_length = htons(parameter_len);
4817 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4818 chunk_len += parameter_len;
4820 /* add authentication parameters */
4821 if (stcb->asoc.auth_supported) {
4822 /* attach RANDOM parameter, if available */
4823 if (stcb->asoc.authinfo.random != NULL) {
4824 struct sctp_auth_random *randp;
4826 if (padding_len > 0) {
4827 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4828 chunk_len += padding_len;
4831 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
4832 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
4833 /* random key already contains the header */
4834 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
4835 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4836 chunk_len += parameter_len;
4838 /* add HMAC_ALGO parameter */
4839 if (stcb->asoc.local_hmacs != NULL) {
4840 struct sctp_auth_hmac_algo *hmacs;
4842 if (padding_len > 0) {
4843 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4844 chunk_len += padding_len;
4847 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
4848 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
4849 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
4850 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
4851 hmacs->ph.param_length = htons(parameter_len);
4852 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
4853 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4854 chunk_len += parameter_len;
4856 /* add CHUNKS parameter */
4857 if (stcb->asoc.local_auth_chunks != NULL) {
4858 struct sctp_auth_chunk_list *chunks;
4860 if (padding_len > 0) {
4861 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4862 chunk_len += padding_len;
4865 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
4866 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
4867 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
4868 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
4869 chunks->ph.param_length = htons(parameter_len);
4870 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
4871 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
4872 chunk_len += parameter_len;
4875 /* now any cookie time extensions */
4876 if (stcb->asoc.cookie_preserve_req) {
4877 struct sctp_cookie_perserve_param *cookie_preserve;
4879 if (padding_len > 0) {
4880 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4881 chunk_len += padding_len;
4884 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
4885 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
4886 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
4887 cookie_preserve->ph.param_length = htons(parameter_len);
4888 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
4889 stcb->asoc.cookie_preserve_req = 0;
4890 chunk_len += parameter_len;
4892 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
4895 if (padding_len > 0) {
4896 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
4897 chunk_len += padding_len;
4900 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
4901 if (stcb->asoc.scope.ipv4_addr_legal) {
4902 parameter_len += (uint16_t) sizeof(uint16_t);
4904 if (stcb->asoc.scope.ipv6_addr_legal) {
4905 parameter_len += (uint16_t) sizeof(uint16_t);
4907 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
4908 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
4909 sup_addr->ph.param_length = htons(parameter_len);
4911 if (stcb->asoc.scope.ipv4_addr_legal) {
4912 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
4914 if (stcb->asoc.scope.ipv6_addr_legal) {
4915 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
4917 padding_len = 4 - 2 * i;
4918 chunk_len += parameter_len;
4920 SCTP_BUF_LEN(m) = chunk_len;
4921 /* now the addresses */
4923 * To optimize this we could put the scoping stuff into a structure
4924 * and remove the individual uint8's from the assoc structure. Then
4925 * we could just sifa in the address within the stcb. But for now
4926 * this is a quick hack to get the address stuff teased apart.
4928 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
4930 &padding_len, &chunk_len);
4932 init->ch.chunk_length = htons(chunk_len);
4933 if (padding_len > 0) {
4934 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
4939 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
4940 ret = sctp_lowlevel_chunk_output(inp, stcb, net,
4941 (struct sockaddr *)&net->ro._l_addr,
4942 m, 0, NULL, 0, 0, 0, 0,
4943 inp->sctp_lport, stcb->rport, htonl(0),
4947 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
4948 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
4949 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
4953 sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
4954 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
4957 * Given a mbuf containing an INIT or INIT-ACK with the param_offset
4958 * being equal to the beginning of the params i.e. (iphlen +
4959 * sizeof(struct sctp_init_msg) parse through the parameters to the
4960 * end of the mbuf verifying that all parameters are known.
4962 * For unknown parameters build and return a mbuf with
4963 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
4964 * processing this chunk stop, and set *abort_processing to 1.
4966 * By having param_offset be pre-set to where parameters begin it is
4967 * hoped that this routine may be reused in the future by new
4970 struct sctp_paramhdr *phdr, params;
4972 struct mbuf *mat, *op_err;
4973 char tempbuf[SCTP_PARAM_BUFFER_SIZE];
4974 int at, limit, pad_needed;
4975 uint16_t ptype, plen, padded_size;
4978 *abort_processing = 0;
4981 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
4984 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
4985 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
4986 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
4987 ptype = ntohs(phdr->param_type);
4988 plen = ntohs(phdr->param_length);
4989 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
4990 /* wacked parameter */
4991 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
4994 limit -= SCTP_SIZE32(plen);
4996 * All parameters for all chunks that we know/understand are
4997 * listed here. We process them other places and make
4998 * appropriate stop actions per the upper bits. However this
4999 * is the generic routine processor's can call to get back
5000 * an operr.. to either incorporate (init-ack) or send.
5002 padded_size = SCTP_SIZE32(plen);
5004 /* Param's with variable size */
5005 case SCTP_HEARTBEAT_INFO:
5006 case SCTP_STATE_COOKIE:
5007 case SCTP_UNRECOG_PARAM:
5008 case SCTP_ERROR_CAUSE_IND:
5012 /* Param's with variable size within a range */
5013 case SCTP_CHUNK_LIST:
5014 case SCTP_SUPPORTED_CHUNK_EXT:
5015 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
5016 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
5021 case SCTP_SUPPORTED_ADDRTYPE:
5022 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
5023 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
5029 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
5030 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
5035 case SCTP_SET_PRIM_ADDR:
5036 case SCTP_DEL_IP_ADDRESS:
5037 case SCTP_ADD_IP_ADDRESS:
5038 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
5039 (padded_size != sizeof(struct sctp_asconf_addr_param))) {
5040 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
5045 /* Param's with a fixed size */
5046 case SCTP_IPV4_ADDRESS:
5047 if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
5048 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
5053 case SCTP_IPV6_ADDRESS:
5054 if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
5055 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
5060 case SCTP_COOKIE_PRESERVE:
5061 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
5062 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
5067 case SCTP_HAS_NAT_SUPPORT:
5070 case SCTP_PRSCTP_SUPPORTED:
5071 if (padded_size != sizeof(struct sctp_paramhdr)) {
5072 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
5077 case SCTP_ECN_CAPABLE:
5078 if (padded_size != sizeof(struct sctp_paramhdr)) {
5079 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
5084 case SCTP_ULP_ADAPTATION:
5085 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
5086 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
5091 case SCTP_SUCCESS_REPORT:
5092 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
5093 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
5098 case SCTP_HOSTNAME_ADDRESS:
5100 /* We can NOT handle HOST NAME addresses!! */
5103 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
5104 *abort_processing = 1;
5105 if (op_err == NULL) {
5106 /* Ok need to try to get a mbuf */
5108 l_len = SCTP_MIN_OVERHEAD;
5110 l_len = SCTP_MIN_V4_OVERHEAD;
5112 l_len += sizeof(struct sctp_chunkhdr);
5114 l_len += sizeof(struct sctp_paramhdr);
5115 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5117 SCTP_BUF_LEN(op_err) = 0;
5119 * pre-reserve space for ip
5120 * and sctp header and
5124 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5126 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5128 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5133 /* If we have space */
5134 struct sctp_paramhdr s;
5137 uint32_t cpthis = 0;
5139 pad_needed = 4 - (err_at % 4);
5140 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5141 err_at += pad_needed;
5143 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
5144 s.param_length = htons(sizeof(s) + plen);
5145 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5146 err_at += sizeof(s);
5147 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5149 sctp_m_freem(op_err);
5151 * we are out of memory but
5152 * we still need to have a
5153 * look at what to do (the
5154 * system is in trouble
5159 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5166 * we do not recognize the parameter figure out what
5169 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
5170 if ((ptype & 0x4000) == 0x4000) {
5171 /* Report bit is set?? */
5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
5173 if (op_err == NULL) {
5176 /* Ok need to try to get an mbuf */
5178 l_len = SCTP_MIN_OVERHEAD;
5180 l_len = SCTP_MIN_V4_OVERHEAD;
5182 l_len += sizeof(struct sctp_chunkhdr);
5184 l_len += sizeof(struct sctp_paramhdr);
5185 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5187 SCTP_BUF_LEN(op_err) = 0;
5189 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5191 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5193 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5198 /* If we have space */
5199 struct sctp_paramhdr s;
5202 uint32_t cpthis = 0;
5204 pad_needed = 4 - (err_at % 4);
5205 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5206 err_at += pad_needed;
5208 s.param_type = htons(SCTP_UNRECOG_PARAM);
5209 s.param_length = htons(sizeof(s) + plen);
5210 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5211 err_at += sizeof(s);
5212 if (plen > sizeof(tempbuf)) {
5213 plen = sizeof(tempbuf);
5215 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
5217 sctp_m_freem(op_err);
5219 * we are out of memory but
5220 * we still need to have a
5221 * look at what to do (the
5222 * system is in trouble
5226 goto more_processing;
5228 m_copyback(op_err, err_at, plen, (caddr_t)phdr);
5233 if ((ptype & 0x8000) == 0x0000) {
5234 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
5237 /* skip this chunk and continue processing */
5238 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
5239 at += SCTP_SIZE32(plen);
5244 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params));
5248 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
5249 *abort_processing = 1;
5250 if ((op_err == NULL) && phdr) {
5254 l_len = SCTP_MIN_OVERHEAD;
5256 l_len = SCTP_MIN_V4_OVERHEAD;
5258 l_len += sizeof(struct sctp_chunkhdr);
5259 l_len += (2 * sizeof(struct sctp_paramhdr));
5260 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
5262 SCTP_BUF_LEN(op_err) = 0;
5264 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
5266 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
5268 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
5272 if ((op_err) && phdr) {
5273 struct sctp_paramhdr s;
5276 uint32_t cpthis = 0;
5278 pad_needed = 4 - (err_at % 4);
5279 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
5280 err_at += pad_needed;
5282 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
5283 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
5284 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
5285 err_at += sizeof(s);
5286 /* Only copy back the p-hdr that caused the issue */
5287 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
5293 sctp_are_there_new_addresses(struct sctp_association *asoc,
5294 struct mbuf *in_initpkt, int offset, struct sockaddr *src)
5297 * Given a INIT packet, look through the packet to verify that there
5298 * are NO new addresses. As we go through the parameters add reports
5299 * of any un-understood parameters that require an error. Also we
5300 * must return (1) to drop the packet if we see a un-understood
5301 * parameter that tells us to drop the chunk.
5303 struct sockaddr *sa_touse;
5304 struct sockaddr *sa;
5305 struct sctp_paramhdr *phdr, params;
5306 uint16_t ptype, plen;
5308 struct sctp_nets *net;
5311 struct sockaddr_in sin4, *sa4;
5315 struct sockaddr_in6 sin6, *sa6;
5320 memset(&sin4, 0, sizeof(sin4));
5321 sin4.sin_family = AF_INET;
5322 sin4.sin_len = sizeof(sin4);
5325 memset(&sin6, 0, sizeof(sin6));
5326 sin6.sin6_family = AF_INET6;
5327 sin6.sin6_len = sizeof(sin6);
5329 /* First what about the src address of the pkt ? */
5331 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5332 sa = (struct sockaddr *)&net->ro._l_addr;
5333 if (sa->sa_family == src->sa_family) {
5335 if (sa->sa_family == AF_INET) {
5336 struct sockaddr_in *src4;
5338 sa4 = (struct sockaddr_in *)sa;
5339 src4 = (struct sockaddr_in *)src;
5340 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
5347 if (sa->sa_family == AF_INET6) {
5348 struct sockaddr_in6 *src6;
5350 sa6 = (struct sockaddr_in6 *)sa;
5351 src6 = (struct sockaddr_in6 *)src;
5352 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
5361 /* New address added! no need to look futher. */
5364 /* Ok so far lets munge through the rest of the packet */
5365 offset += sizeof(struct sctp_init_chunk);
5366 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5369 ptype = ntohs(phdr->param_type);
5370 plen = ntohs(phdr->param_length);
5373 case SCTP_IPV4_ADDRESS:
5375 struct sctp_ipv4addr_param *p4, p4_buf;
5377 phdr = sctp_get_next_param(in_initpkt, offset,
5378 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
5379 if (plen != sizeof(struct sctp_ipv4addr_param) ||
5383 p4 = (struct sctp_ipv4addr_param *)phdr;
5384 sin4.sin_addr.s_addr = p4->addr;
5385 sa_touse = (struct sockaddr *)&sin4;
5390 case SCTP_IPV6_ADDRESS:
5392 struct sctp_ipv6addr_param *p6, p6_buf;
5394 phdr = sctp_get_next_param(in_initpkt, offset,
5395 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
5396 if (plen != sizeof(struct sctp_ipv6addr_param) ||
5400 p6 = (struct sctp_ipv6addr_param *)phdr;
5401 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
5403 sa_touse = (struct sockaddr *)&sin6;
5412 /* ok, sa_touse points to one to check */
5414 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
5415 sa = (struct sockaddr *)&net->ro._l_addr;
5416 if (sa->sa_family != sa_touse->sa_family) {
5420 if (sa->sa_family == AF_INET) {
5421 sa4 = (struct sockaddr_in *)sa;
5422 if (sa4->sin_addr.s_addr ==
5423 sin4.sin_addr.s_addr) {
5430 if (sa->sa_family == AF_INET6) {
5431 sa6 = (struct sockaddr_in6 *)sa;
5432 if (SCTP6_ARE_ADDR_EQUAL(
5441 /* New addr added! no need to look further */
5445 offset += SCTP_SIZE32(plen);
5446 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params));
5452 * Given a MBUF chain that was sent into us containing an INIT. Build a
5453 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
5454 * a pullup to include IPv6/4header, SCTP header and initial part of INIT
5455 * message (i.e. the struct sctp_init_msg).
5458 sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
5459 struct mbuf *init_pkt, int iphlen, int offset,
5460 struct sockaddr *src, struct sockaddr *dst,
5461 struct sctphdr *sh, struct sctp_init_chunk *init_chk,
5462 uint8_t mflowtype, uint32_t mflowid,
5463 uint32_t vrf_id, uint16_t port, int hold_inp_lock)
5465 struct sctp_association *asoc;
5466 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
5467 struct sctp_init_ack_chunk *initack;
5468 struct sctp_adaptation_layer_indication *ali;
5469 struct sctp_supported_chunk_types_param *pr_supported;
5470 struct sctp_paramhdr *ph;
5471 union sctp_sockstore *over_addr;
5472 struct sctp_scoping scp;
5475 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
5476 struct sockaddr_in *src4 = (struct sockaddr_in *)src;
5477 struct sockaddr_in *sin;
5481 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
5482 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
5483 struct sockaddr_in6 *sin6;
5486 struct sockaddr *to;
5487 struct sctp_state_cookie stc;
5488 struct sctp_nets *net = NULL;
5489 uint8_t *signature = NULL;
5490 int cnt_inits_to = 0;
5491 uint16_t his_limit, i_want;
5493 int nat_friendly = 0;
5495 uint16_t num_ext, chunk_len, padding_len, parameter_len;
5502 if ((asoc != NULL) &&
5503 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
5504 (sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
5505 /* new addresses, out of here in non-cookie-wait states */
5507 * Send a ABORT, we don't add the new address error clause
5508 * though we even set the T bit and copy in the 0 tag.. this
5509 * looks no different than if no listener was present.
5511 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5513 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
5519 op_err = sctp_arethere_unrecognized_parameters(init_pkt,
5520 (offset + sizeof(struct sctp_init_chunk)),
5521 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
5524 if (op_err == NULL) {
5525 char msg[SCTP_DIAG_INFO_LEN];
5527 snprintf(msg, sizeof(msg), "%s:%d at %s\n", __FILE__, __LINE__, __FUNCTION__);
5528 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
5531 sctp_send_abort(init_pkt, iphlen, src, dst, sh,
5532 init_chk->init.initiate_tag, op_err,
5537 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
5539 /* No memory, INIT timer will re-attempt. */
5541 sctp_m_freem(op_err);
5544 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
5548 * We might not overwrite the identification[] completely and on
5549 * some platforms time_entered will contain some padding. Therefore
5550 * zero out the cookie to avoid putting uninitialized memory on the
5553 memset(&stc, 0, sizeof(struct sctp_state_cookie));
5555 /* the time I built cookie */
5556 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
5558 /* populate any tie tags */
5560 /* unlock before tag selections */
5561 stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
5562 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
5563 stc.cookie_life = asoc->cookie_life;
5564 net = asoc->primary_destination;
5566 stc.tie_tag_my_vtag = 0;
5567 stc.tie_tag_peer_vtag = 0;
5568 /* life I will award this cookie */
5569 stc.cookie_life = inp->sctp_ep.def_cookie_life;
5572 /* copy in the ports for later check */
5573 stc.myport = sh->dest_port;
5574 stc.peerport = sh->src_port;
5577 * If we wanted to honor cookie life extentions, we would add to
5578 * stc.cookie_life. For now we should NOT honor any extension
5580 stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
5581 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
5582 stc.ipv6_addr_legal = 1;
5583 if (SCTP_IPV6_V6ONLY(inp)) {
5584 stc.ipv4_addr_legal = 0;
5586 stc.ipv4_addr_legal = 1;
5589 stc.ipv6_addr_legal = 0;
5590 stc.ipv4_addr_legal = 1;
5595 switch (dst->sa_family) {
5599 /* lookup address */
5600 stc.address[0] = src4->sin_addr.s_addr;
5604 stc.addr_type = SCTP_IPV4_ADDRESS;
5605 /* local from address */
5606 stc.laddress[0] = dst4->sin_addr.s_addr;
5607 stc.laddress[1] = 0;
5608 stc.laddress[2] = 0;
5609 stc.laddress[3] = 0;
5610 stc.laddr_type = SCTP_IPV4_ADDRESS;
5611 /* scope_id is only for v6 */
5613 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
5614 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
5617 /* Must use the address in this case */
5618 if (sctp_is_address_on_local_host(src, vrf_id)) {
5619 stc.loopback_scope = 1;
5622 stc.local_scope = 0;
5630 stc.addr_type = SCTP_IPV6_ADDRESS;
5631 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
5632 stc.scope_id = in6_getscope(&src6->sin6_addr);
5633 if (sctp_is_address_on_local_host(src, vrf_id)) {
5634 stc.loopback_scope = 1;
5635 stc.local_scope = 0;
5638 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
5639 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
5641 * If the new destination or source
5642 * is a LINK_LOCAL we must have
5643 * common both site and local scope.
5644 * Don't set local scope though
5645 * since we must depend on the
5646 * source to be added implicitly. We
5647 * cannot assure just because we
5648 * share one link that all links are
5651 stc.local_scope = 0;
5655 * we start counting for the private
5656 * address stuff at 1. since the
5657 * link local we source from won't
5658 * show up in our scoped count.
5662 * pull out the scope_id from
5665 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
5666 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
5668 * If the new destination or source
5669 * is SITE_LOCAL then we must have
5670 * site scope in common.
5674 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
5675 stc.laddr_type = SCTP_IPV6_ADDRESS;
5685 /* set the scope per the existing tcb */
5688 struct sctp_nets *lnet;
5692 stc.loopback_scope = asoc->scope.loopback_scope;
5693 stc.ipv4_scope = asoc->scope.ipv4_local_scope;
5694 stc.site_scope = asoc->scope.site_scope;
5695 stc.local_scope = asoc->scope.local_scope;
5697 /* Why do we not consider IPv4 LL addresses? */
5698 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
5699 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
5700 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
5702 * if we have a LL address, start
5710 /* use the net pointer */
5711 to = (struct sockaddr *)&net->ro._l_addr;
5712 switch (to->sa_family) {
5715 sin = (struct sockaddr_in *)to;
5716 stc.address[0] = sin->sin_addr.s_addr;
5720 stc.addr_type = SCTP_IPV4_ADDRESS;
5721 if (net->src_addr_selected == 0) {
5723 * strange case here, the INIT should have
5724 * did the selection.
5726 net->ro._s_addr = sctp_source_address_selection(inp,
5727 stcb, (sctp_route_t *) & net->ro,
5729 if (net->ro._s_addr == NULL)
5732 net->src_addr_selected = 1;
5735 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
5736 stc.laddress[1] = 0;
5737 stc.laddress[2] = 0;
5738 stc.laddress[3] = 0;
5739 stc.laddr_type = SCTP_IPV4_ADDRESS;
5740 /* scope_id is only for v6 */
5746 sin6 = (struct sockaddr_in6 *)to;
5747 memcpy(&stc.address, &sin6->sin6_addr,
5748 sizeof(struct in6_addr));
5749 stc.addr_type = SCTP_IPV6_ADDRESS;
5750 stc.scope_id = sin6->sin6_scope_id;
5751 if (net->src_addr_selected == 0) {
5753 * strange case here, the INIT should have
5754 * done the selection.
5756 net->ro._s_addr = sctp_source_address_selection(inp,
5757 stcb, (sctp_route_t *) & net->ro,
5759 if (net->ro._s_addr == NULL)
5762 net->src_addr_selected = 1;
5764 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
5765 sizeof(struct in6_addr));
5766 stc.laddr_type = SCTP_IPV6_ADDRESS;
5771 /* Now lets put the SCTP header in place */
5772 initack = mtod(m, struct sctp_init_ack_chunk *);
5773 /* Save it off for quick ref */
5774 stc.peers_vtag = init_chk->init.initiate_tag;
5776 memcpy(stc.identification, SCTP_VERSION_STRING,
5777 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
5778 memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
5779 /* now the chunk header */
5780 initack->ch.chunk_type = SCTP_INITIATION_ACK;
5781 initack->ch.chunk_flags = 0;
5782 /* fill in later from mbuf we build */
5783 initack->ch.chunk_length = 0;
5784 /* place in my tag */
5785 if ((asoc != NULL) &&
5786 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
5787 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
5788 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
5789 /* re-use the v-tags and init-seq here */
5790 initack->init.initiate_tag = htonl(asoc->my_vtag);
5791 initack->init.initial_tsn = htonl(asoc->init_seq_number);
5793 uint32_t vtag, itsn;
5795 if (hold_inp_lock) {
5796 SCTP_INP_INCR_REF(inp);
5797 SCTP_INP_RUNLOCK(inp);
5800 atomic_add_int(&asoc->refcnt, 1);
5801 SCTP_TCB_UNLOCK(stcb);
5803 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5804 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
5806 * Got a duplicate vtag on some guy behind a
5807 * nat make sure we don't use it.
5811 initack->init.initiate_tag = htonl(vtag);
5812 /* get a TSN to use too */
5813 itsn = sctp_select_initial_TSN(&inp->sctp_ep);
5814 initack->init.initial_tsn = htonl(itsn);
5815 SCTP_TCB_LOCK(stcb);
5816 atomic_add_int(&asoc->refcnt, -1);
5818 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
5819 initack->init.initiate_tag = htonl(vtag);
5820 /* get a TSN to use too */
5821 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
5823 if (hold_inp_lock) {
5824 SCTP_INP_RLOCK(inp);
5825 SCTP_INP_DECR_REF(inp);
5828 /* save away my tag to */
5829 stc.my_vtag = initack->init.initiate_tag;
5831 /* set up some of the credits. */
5832 so = inp->sctp_socket;
5834 /* memory problem */
5838 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
5840 /* set what I want */
5841 his_limit = ntohs(init_chk->init.num_inbound_streams);
5842 /* choose what I want */
5844 if (asoc->streamoutcnt > inp->sctp_ep.pre_open_stream_count) {
5845 i_want = asoc->streamoutcnt;
5847 i_want = inp->sctp_ep.pre_open_stream_count;
5850 i_want = inp->sctp_ep.pre_open_stream_count;
5852 if (his_limit < i_want) {
5853 /* I Want more :< */
5854 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
5856 /* I can have what I want :> */
5857 initack->init.num_outbound_streams = htons(i_want);
5859 /* tell him his limit. */
5860 initack->init.num_inbound_streams =
5861 htons(inp->sctp_ep.max_open_streams_intome);
5863 /* adaptation layer indication parameter */
5864 if (inp->sctp_ep.adaptation_layer_indicator_provided) {
5865 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
5866 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
5867 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
5868 ali->ph.param_length = htons(parameter_len);
5869 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
5870 chunk_len += parameter_len;
5873 if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
5874 ((asoc == NULL) && (inp->ecn_supported == 1))) {
5875 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5876 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5877 ph->param_type = htons(SCTP_ECN_CAPABLE);
5878 ph->param_length = htons(parameter_len);
5879 chunk_len += parameter_len;
5881 /* PR-SCTP supported parameter */
5882 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5883 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5884 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5885 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5886 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
5887 ph->param_length = htons(parameter_len);
5888 chunk_len += parameter_len;
5890 /* Add NAT friendly parameter */
5892 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
5893 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
5894 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
5895 ph->param_length = htons(parameter_len);
5896 chunk_len += parameter_len;
5898 /* And now tell the peer which extensions we support */
5900 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
5901 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
5902 ((asoc == NULL) && (inp->prsctp_supported == 1))) {
5903 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
5905 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5906 ((asoc == NULL) && (inp->auth_supported == 1))) {
5907 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
5909 if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
5910 ((asoc == NULL) && (inp->asconf_supported == 1))) {
5911 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
5912 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
5914 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
5915 ((asoc == NULL) && (inp->reconfig_supported == 1))) {
5916 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
5918 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
5919 ((asoc == NULL) && (inp->nrsack_supported == 1))) {
5920 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
5922 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
5923 ((asoc == NULL) && (inp->pktdrop_supported == 1))) {
5924 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
5927 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
5928 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
5929 pr_supported->ph.param_length = htons(parameter_len);
5930 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5931 chunk_len += parameter_len;
5933 /* add authentication parameters */
5934 if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
5935 ((asoc == NULL) && (inp->auth_supported == 1))) {
5936 struct sctp_auth_random *randp;
5937 struct sctp_auth_hmac_algo *hmacs;
5938 struct sctp_auth_chunk_list *chunks;
5940 if (padding_len > 0) {
5941 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5942 chunk_len += padding_len;
5945 /* generate and add RANDOM parameter */
5946 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
5947 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
5948 SCTP_AUTH_RANDOM_SIZE_DEFAULT;
5949 randp->ph.param_type = htons(SCTP_RANDOM);
5950 randp->ph.param_length = htons(parameter_len);
5951 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
5952 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5953 chunk_len += parameter_len;
5955 if (padding_len > 0) {
5956 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5957 chunk_len += padding_len;
5960 /* add HMAC_ALGO parameter */
5961 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
5962 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
5963 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
5964 (uint8_t *) hmacs->hmac_ids);
5965 hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
5966 hmacs->ph.param_length = htons(parameter_len);
5967 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5968 chunk_len += parameter_len;
5970 if (padding_len > 0) {
5971 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
5972 chunk_len += padding_len;
5975 /* add CHUNKS parameter */
5976 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
5977 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
5978 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
5979 chunks->chunk_types);
5980 chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
5981 chunks->ph.param_length = htons(parameter_len);
5982 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
5983 chunk_len += parameter_len;
5985 SCTP_BUF_LEN(m) = chunk_len;
5987 /* now the addresses */
5989 * To optimize this we could put the scoping stuff into a structure
5990 * and remove the individual uint8's from the stc structure. Then we
5991 * could just sifa in the address within the stc.. but for now this
5992 * is a quick hack to get the address stuff teased apart.
5994 scp.ipv4_addr_legal = stc.ipv4_addr_legal;
5995 scp.ipv6_addr_legal = stc.ipv6_addr_legal;
5996 scp.loopback_scope = stc.loopback_scope;
5997 scp.ipv4_local_scope = stc.ipv4_scope;
5998 scp.local_scope = stc.local_scope;
5999 scp.site_scope = stc.site_scope;
6000 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
6002 &padding_len, &chunk_len);
6003 /* padding_len can only be positive, if no addresses have been added */
6004 if (padding_len > 0) {
6005 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
6006 chunk_len += padding_len;
6007 SCTP_BUF_LEN(m) += padding_len;
6010 /* tack on the operational error if present */
6013 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6014 parameter_len += SCTP_BUF_LEN(m_tmp);
6016 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6017 SCTP_BUF_NEXT(m_last) = op_err;
6018 while (SCTP_BUF_NEXT(m_last) != NULL) {
6019 m_last = SCTP_BUF_NEXT(m_last);
6021 chunk_len += parameter_len;
6023 if (padding_len > 0) {
6024 m_last = sctp_add_pad_tombuf(m_last, padding_len);
6025 if (m_last == NULL) {
6026 /* Houston we have a problem, no space */
6030 chunk_len += padding_len;
6033 /* Now we must build a cookie */
6034 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
6035 if (m_cookie == NULL) {
6036 /* memory problem */
6040 /* Now append the cookie to the end and update the space/size */
6041 SCTP_BUF_NEXT(m_last) = m_cookie;
6043 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
6044 parameter_len += SCTP_BUF_LEN(m_tmp);
6045 if (SCTP_BUF_NEXT(m_tmp) == NULL) {
6049 padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
6050 chunk_len += parameter_len;
6053 * Place in the size, but we don't include the last pad (if any) in
6056 initack->ch.chunk_length = htons(chunk_len);
6059 * Time to sign the cookie, we don't sign over the cookie signature
6060 * though thus we set trailer.
6062 (void)sctp_hmac_m(SCTP_HMAC,
6063 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
6064 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
6065 (uint8_t *) signature, SCTP_SIGNATURE_SIZE);
6067 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
6068 * here since the timer will drive a retranmission.
6070 if (padding_len > 0) {
6071 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
6076 if (stc.loopback_scope) {
6077 over_addr = (union sctp_sockstore *)dst;
6082 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
6084 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
6087 SCTP_SO_NOT_LOCKED);
6088 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
6093 sctp_prune_prsctp(struct sctp_tcb *stcb,
6094 struct sctp_association *asoc,
6095 struct sctp_sndrcvinfo *srcv,
6099 struct sctp_tmit_chunk *chk, *nchk;
6101 SCTP_TCB_LOCK_ASSERT(stcb);
6102 if ((asoc->prsctp_supported) &&
6103 (asoc->sent_queue_cnt_removeable > 0)) {
6104 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
6106 * Look for chunks marked with the PR_SCTP flag AND
6107 * the buffer space flag. If the one being sent is
6108 * equal or greater priority then purge the old one
6109 * and free some space.
6111 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6113 * This one is PR-SCTP AND buffer space
6116 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6118 * Lower numbers equates to higher
6119 * priority so if the one we are
6120 * looking at has a larger or equal
6121 * priority we want to drop the data
6122 * and NOT retransmit it.
6126 * We release the book_size
6127 * if the mbuf is here
6132 if (chk->sent > SCTP_DATAGRAM_UNSENT)
6136 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6139 freed_spc += ret_spc;
6140 if (freed_spc >= dataout) {
6143 } /* if chunk was present */
6144 } /* if of sufficent priority */
6145 } /* if chunk has enabled */
6146 } /* tailqforeach */
6148 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
6149 /* Here we must move to the sent queue and mark */
6150 if (PR_SCTP_BUF_ENABLED(chk->flags)) {
6151 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
6154 * We release the book_size
6155 * if the mbuf is here
6159 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
6162 freed_spc += ret_spc;
6163 if (freed_spc >= dataout) {
6166 } /* end if chk->data */
6167 } /* end if right class */
6168 } /* end if chk pr-sctp */
6169 } /* tailqforeachsafe (chk) */
6170 } /* if enabled in asoc */
6174 sctp_get_frag_point(struct sctp_tcb *stcb,
6175 struct sctp_association *asoc)
6180 * For endpoints that have both v6 and v4 addresses we must reserve
6181 * room for the ipv6 header, for those that are only dealing with V4
6182 * we use a larger frag point.
6184 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
6185 ovh = SCTP_MED_OVERHEAD;
6187 ovh = SCTP_MED_V4_OVERHEAD;
6190 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
6191 siz = asoc->smallest_mtu - ovh;
6193 siz = (stcb->asoc.sctp_frag_point - ovh);
6195 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
6197 /* A data chunk MUST fit in a cluster */
6198 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
6201 /* adjust for an AUTH chunk if DATA requires auth */
6202 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
6203 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
6206 /* make it an even word boundary please */
6213 sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
6216 * We assume that the user wants PR_SCTP_TTL if the user provides a
6217 * positive lifetime but does not specify any PR_SCTP policy.
6219 if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
6220 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6221 } else if (sp->timetolive > 0) {
6222 sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
6223 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
6227 switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
6228 case CHUNK_FLAGS_PR_SCTP_BUF:
6230 * Time to live is a priority stored in tv_sec when doing
6231 * the buffer drop thing.
6233 sp->ts.tv_sec = sp->timetolive;
6236 case CHUNK_FLAGS_PR_SCTP_TTL:
6240 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6241 tv.tv_sec = sp->timetolive / 1000;
6242 tv.tv_usec = (sp->timetolive * 1000) % 1000000;
6244 * TODO sctp_constants.h needs alternative time
6245 * macros when _KERNEL is undefined.
6247 timevaladd(&sp->ts, &tv);
6250 case CHUNK_FLAGS_PR_SCTP_RTX:
6252 * Time to live is a the number or retransmissions stored in
6255 sp->ts.tv_sec = sp->timetolive;
6259 SCTPDBG(SCTP_DEBUG_USRREQ1,
6260 "Unknown PR_SCTP policy %u.\n",
6261 PR_SCTP_POLICY(sp->sinfo_flags));
6267 sctp_msg_append(struct sctp_tcb *stcb,
6268 struct sctp_nets *net,
6270 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
6274 struct sctp_stream_queue_pending *sp = NULL;
6275 struct sctp_stream_out *strm;
6278 * Given an mbuf chain, put it into the association send queue and
6279 * place it on the wheel
6281 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
6282 /* Invalid stream number */
6283 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6287 if ((stcb->asoc.stream_locked) &&
6288 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
6289 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
6293 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
6294 /* Now can we send this? */
6295 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
6296 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
6297 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
6298 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
6299 /* got data while shutting down */
6300 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
6304 sctp_alloc_a_strmoq(stcb, sp);
6306 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6310 sp->sinfo_flags = srcv->sinfo_flags;
6311 sp->timetolive = srcv->sinfo_timetolive;
6312 sp->ppid = srcv->sinfo_ppid;
6313 sp->context = srcv->sinfo_context;
6314 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
6316 atomic_add_int(&sp->net->ref_count, 1);
6320 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
6321 sp->stream = srcv->sinfo_stream;
6322 sp->msg_is_complete = 1;
6323 sp->sender_all_done = 1;
6326 sp->tail_mbuf = NULL;
6327 sctp_set_prsctp_policy(sp);
6329 * We could in theory (for sendall) sifa the length in, but we would
6330 * still have to hunt through the chain since we need to setup the
6334 for (at = m; at; at = SCTP_BUF_NEXT(at)) {
6335 if (SCTP_BUF_NEXT(at) == NULL)
6337 sp->length += SCTP_BUF_LEN(at);
6339 if (srcv->sinfo_keynumber_valid) {
6340 sp->auth_keyid = srcv->sinfo_keynumber;
6342 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
6344 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
6345 sctp_auth_key_acquire(stcb, sp->auth_keyid);
6346 sp->holds_key_ref = 1;
6348 if (hold_stcb_lock == 0) {
6349 SCTP_TCB_SEND_LOCK(stcb);
6351 sctp_snd_sb_alloc(stcb, sp->length);
6352 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
6353 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
6354 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
6356 if (hold_stcb_lock == 0) {
6357 SCTP_TCB_SEND_UNLOCK(stcb);
6367 static struct mbuf *
6368 sctp_copy_mbufchain(struct mbuf *clonechain,
6369 struct mbuf *outchain,
6370 struct mbuf **endofchain,
6373 uint8_t copy_by_ref)
6376 struct mbuf *appendchain;
6380 if (endofchain == NULL) {
6384 sctp_m_freem(outchain);
6387 if (can_take_mbuf) {
6388 appendchain = clonechain;
6391 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
6393 /* Its not in a cluster */
6394 if (*endofchain == NULL) {
6395 /* lets get a mbuf cluster */
6396 if (outchain == NULL) {
6397 /* This is the general case */
6399 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6400 if (outchain == NULL) {
6403 SCTP_BUF_LEN(outchain) = 0;
6404 *endofchain = outchain;
6405 /* get the prepend space */
6406 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
6409 * We really should not get a NULL
6415 if (SCTP_BUF_NEXT(m) == NULL) {
6419 m = SCTP_BUF_NEXT(m);
6422 if (*endofchain == NULL) {
6424 * huh, TSNH XXX maybe we
6427 sctp_m_freem(outchain);
6431 /* get the new end of length */
6432 len = M_TRAILINGSPACE(*endofchain);
6434 /* how much is left at the end? */
6435 len = M_TRAILINGSPACE(*endofchain);
6437 /* Find the end of the data, for appending */
6438 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
6440 /* Now lets copy it out */
6441 if (len >= sizeofcpy) {
6442 /* It all fits, copy it in */
6443 m_copydata(clonechain, 0, sizeofcpy, cp);
6444 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6446 /* fill up the end of the chain */
6448 m_copydata(clonechain, 0, len, cp);
6449 SCTP_BUF_LEN((*endofchain)) += len;
6450 /* now we need another one */
6453 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
6458 SCTP_BUF_NEXT((*endofchain)) = m;
6460 cp = mtod((*endofchain), caddr_t);
6461 m_copydata(clonechain, len, sizeofcpy, cp);
6462 SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
6466 /* copy the old fashion way */
6467 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
6468 #ifdef SCTP_MBUF_LOGGING
6469 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6470 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
6475 if (appendchain == NULL) {
6478 sctp_m_freem(outchain);
6482 /* tack on to the end */
6483 if (*endofchain != NULL) {
6484 SCTP_BUF_NEXT(((*endofchain))) = appendchain;
6488 if (SCTP_BUF_NEXT(m) == NULL) {
6489 SCTP_BUF_NEXT(m) = appendchain;
6492 m = SCTP_BUF_NEXT(m);
6496 * save off the end and update the end-chain postion
6500 if (SCTP_BUF_NEXT(m) == NULL) {
6504 m = SCTP_BUF_NEXT(m);
6508 /* save off the end and update the end-chain postion */
6511 if (SCTP_BUF_NEXT(m) == NULL) {
6515 m = SCTP_BUF_NEXT(m);
6517 return (appendchain);
6522 sctp_med_chunk_output(struct sctp_inpcb *inp,
6523 struct sctp_tcb *stcb,
6524 struct sctp_association *asoc,
6527 int control_only, int from_where,
6528 struct timeval *now, int *now_filled, int frag_point, int so_locked
6529 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6535 sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
6536 uint32_t val SCTP_UNUSED)
6538 struct sctp_copy_all *ca;
6541 int added_control = 0;
6542 int un_sent, do_chunk_output = 1;
6543 struct sctp_association *asoc;
6544 struct sctp_nets *net;
6546 ca = (struct sctp_copy_all *)ptr;
6547 if (ca->m == NULL) {
6550 if (ca->inp != inp) {
6554 if (ca->sndlen > 0) {
6555 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
6557 /* can't copy so we are done */
6561 #ifdef SCTP_MBUF_LOGGING
6562 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
6563 sctp_log_mbc(m, SCTP_MBUF_ICOPY);
6569 SCTP_TCB_LOCK_ASSERT(stcb);
6570 if (stcb->asoc.alternate) {
6571 net = stcb->asoc.alternate;
6573 net = stcb->asoc.primary_destination;
6575 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
6576 /* Abort this assoc with m as the user defined reason */
6578 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
6580 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
6581 0, M_NOWAIT, 1, MT_DATA);
6582 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
6585 struct sctp_paramhdr *ph;
6587 ph = mtod(m, struct sctp_paramhdr *);
6588 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
6589 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
6592 * We add one here to keep the assoc from dis-appearing on
6595 atomic_add_int(&stcb->asoc.refcnt, 1);
6596 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
6598 * sctp_abort_an_association calls sctp_free_asoc() free
6599 * association will NOT free it since we incremented the
6600 * refcnt .. we do this to prevent it being freed and things
6601 * getting tricky since we could end up (from free_asoc)
6602 * calling inpcb_free which would get a recursive lock call
6603 * to the iterator lock.. But as a consequence of that the
6604 * stcb will return to us un-locked.. since free_asoc
6605 * returns with either no TCB or the TCB unlocked, we must
6606 * relock.. to unlock in the iterator timer :-0
6608 SCTP_TCB_LOCK(stcb);
6609 atomic_add_int(&stcb->asoc.refcnt, -1);
6610 goto no_chunk_output;
6613 ret = sctp_msg_append(stcb, net, m,
6617 if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
6618 /* shutdown this assoc */
6621 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
6623 if (TAILQ_EMPTY(&asoc->send_queue) &&
6624 TAILQ_EMPTY(&asoc->sent_queue) &&
6626 if (asoc->locked_on_sending) {
6630 * there is nothing queued to send, so I'm
6633 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6634 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6635 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6637 * only send SHUTDOWN the first time
6640 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
6641 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
6643 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
6644 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
6645 sctp_stop_timers_for_shutdown(stcb);
6646 sctp_send_shutdown(stcb, net);
6647 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
6649 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6650 asoc->primary_destination);
6652 do_chunk_output = 0;
6656 * we still got (or just got) data to send,
6657 * so set SHUTDOWN_PENDING
6660 * XXX sockets draft says that SCTP_EOF
6661 * should be sent with no data. currently,
6662 * we will allow user data to be sent first
6663 * and move to SHUTDOWN-PENDING
6665 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
6666 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
6667 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
6668 if (asoc->locked_on_sending) {
6670 * Locked to send out the
6673 struct sctp_stream_queue_pending *sp;
6675 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
6677 if ((sp->length == 0) && (sp->msg_is_complete == 0))
6678 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
6681 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
6682 if (TAILQ_EMPTY(&asoc->send_queue) &&
6683 TAILQ_EMPTY(&asoc->sent_queue) &&
6684 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
6686 atomic_add_int(&stcb->asoc.refcnt, 1);
6687 sctp_abort_an_association(stcb->sctp_ep, stcb,
6688 NULL, SCTP_SO_NOT_LOCKED);
6689 atomic_add_int(&stcb->asoc.refcnt, -1);
6690 goto no_chunk_output;
6692 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
6693 asoc->primary_destination);
6699 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
6700 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
6702 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
6703 (stcb->asoc.total_flight > 0) &&
6704 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
6705 do_chunk_output = 0;
6707 if (do_chunk_output)
6708 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
6709 else if (added_control) {
6710 int num_out, reason, now_filled = 0;
6714 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
6715 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
6716 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
6727 sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
6729 struct sctp_copy_all *ca;
6731 ca = (struct sctp_copy_all *)ptr;
6733 * Do a notify here? Kacheong suggests that the notify be done at
6734 * the send time.. so you would push up a notification if any send
6735 * failed. Don't know if this is feasable since the only failures we
6736 * have is "memory" related and if you cannot get an mbuf to send
6737 * the data you surely can't get an mbuf to send up to notify the
6738 * user you can't send the data :->
6741 /* now free everything */
6742 sctp_m_freem(ca->m);
6743 SCTP_FREE(ca, SCTP_M_COPYAL);
6746 static struct mbuf *
6747 sctp_copy_out_all(struct uio *uio, int len)
6749 struct mbuf *ret, *at;
6750 int left, willcpy, cancpy, error;
6752 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
6758 SCTP_BUF_LEN(ret) = 0;
6759 /* save space for the data chunk header */
6760 cancpy = M_TRAILINGSPACE(ret);
6761 willcpy = min(cancpy, left);
6764 /* Align data to the end */
6765 error = uiomove(mtod(at, caddr_t), willcpy, uio);
6771 SCTP_BUF_LEN(at) = willcpy;
6772 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
6775 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
6776 if (SCTP_BUF_NEXT(at) == NULL) {
6779 at = SCTP_BUF_NEXT(at);
6780 SCTP_BUF_LEN(at) = 0;
6781 cancpy = M_TRAILINGSPACE(at);
6782 willcpy = min(cancpy, left);
6789 sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
6790 struct sctp_sndrcvinfo *srcv)
6793 struct sctp_copy_all *ca;
6795 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
6799 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6802 memset(ca, 0, sizeof(struct sctp_copy_all));
6806 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
6809 * take off the sendall flag, it would be bad if we failed to do
6812 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
6813 /* get length and mbuf chain */
6815 ca->sndlen = uio->uio_resid;
6816 ca->m = sctp_copy_out_all(uio, ca->sndlen);
6817 if (ca->m == NULL) {
6818 SCTP_FREE(ca, SCTP_M_COPYAL);
6819 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
6823 /* Gather the length of the send */
6827 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
6828 ca->sndlen += SCTP_BUF_LEN(mat);
6831 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
6832 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
6833 SCTP_ASOC_ANY_STATE,
6835 sctp_sendall_completes, inp, 1);
6837 SCTP_PRINTF("Failed to initiate iterator for sendall\n");
6838 SCTP_FREE(ca, SCTP_M_COPYAL);
6839 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
6847 sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
6849 struct sctp_tmit_chunk *chk, *nchk;
6851 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6852 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
6853 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
6855 sctp_m_freem(chk->data);
6858 asoc->ctrl_queue_cnt--;
6859 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6865 sctp_toss_old_asconf(struct sctp_tcb *stcb)
6867 struct sctp_association *asoc;
6868 struct sctp_tmit_chunk *chk, *nchk;
6869 struct sctp_asconf_chunk *acp;
6872 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
6873 /* find SCTP_ASCONF chunk in queue */
6874 if (chk->rec.chunk_id.id == SCTP_ASCONF) {
6876 acp = mtod(chk->data, struct sctp_asconf_chunk *);
6877 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
6882 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
6884 sctp_m_freem(chk->data);
6887 asoc->ctrl_queue_cnt--;
6888 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6895 sctp_clean_up_datalist(struct sctp_tcb *stcb,
6896 struct sctp_association *asoc,
6897 struct sctp_tmit_chunk **data_list,
6899 struct sctp_nets *net)
6902 struct sctp_tmit_chunk *tp1;
6904 for (i = 0; i < bundle_at; i++) {
6905 /* off of the send queue */
6906 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
6907 asoc->send_queue_cnt--;
6910 * Any chunk NOT 0 you zap the time chunk 0 gets
6911 * zapped or set based on if a RTO measurment is
6914 data_list[i]->do_rtt = 0;
6917 data_list[i]->sent_rcv_time = net->last_sent_time;
6918 data_list[i]->rec.data.cwnd_at_send = net->cwnd;
6919 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
6920 if (data_list[i]->whoTo == NULL) {
6921 data_list[i]->whoTo = net;
6922 atomic_add_int(&net->ref_count, 1);
6924 /* on to the sent queue */
6925 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
6926 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6927 struct sctp_tmit_chunk *tpp;
6929 /* need to move back */
6931 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
6933 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
6937 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
6940 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
6942 TAILQ_INSERT_TAIL(&asoc->sent_queue,
6947 /* This does not lower until the cum-ack passes it */
6948 asoc->sent_queue_cnt++;
6949 if ((asoc->peers_rwnd <= 0) &&
6950 (asoc->total_flight == 0) &&
6952 /* Mark the chunk as being a window probe */
6953 SCTP_STAT_INCR(sctps_windowprobed);
6955 #ifdef SCTP_AUDITING_ENABLED
6956 sctp_audit_log(0xC2, 3);
6958 data_list[i]->sent = SCTP_DATAGRAM_SENT;
6959 data_list[i]->snd_count = 1;
6960 data_list[i]->rec.data.chunk_was_revoked = 0;
6961 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
6962 sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
6963 data_list[i]->whoTo->flight_size,
6964 data_list[i]->book_size,
6965 (uintptr_t) data_list[i]->whoTo,
6966 data_list[i]->rec.data.TSN_seq);
6968 sctp_flight_size_increase(data_list[i]);
6969 sctp_total_flight_increase(stcb, data_list[i]);
6970 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
6971 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
6972 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
6974 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
6975 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
6976 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
6977 /* SWS sender side engages */
6978 asoc->peers_rwnd = 0;
6981 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
6982 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
6987 sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
6988 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
6993 struct sctp_tmit_chunk *chk, *nchk;
6995 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
6996 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
6997 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
6998 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
6999 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
7000 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
7001 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
7002 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
7003 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
7004 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
7005 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
7006 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
7007 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
7008 /* Stray chunks must be cleaned up */
7010 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
7012 sctp_m_freem(chk->data);
7015 asoc->ctrl_queue_cnt--;
7016 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
7017 asoc->fwd_tsn_cnt--;
7018 sctp_free_a_chunk(stcb, chk, so_locked);
7019 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
7020 /* special handling, we must look into the param */
7021 if (chk != asoc->str_reset) {
7022 goto clean_up_anyway;
7030 sctp_can_we_split_this(struct sctp_tcb *stcb,
7032 uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
7035 * Make a decision on if I should split a msg into multiple parts.
7036 * This is only asked of incomplete messages.
7040 * If we are doing EEOR we need to always send it if its the
7041 * entire thing, since it might be all the guy is putting in
7044 if (goal_mtu >= length) {
7046 * If we have data outstanding,
7047 * we get another chance when the sack
7048 * arrives to transmit - wait for more data
7050 if (stcb->asoc.total_flight == 0) {
7052 * If nothing is in flight, we zero the
7060 /* You can fill the rest */
7065 * For those strange folk that make the send buffer
7066 * smaller than our fragmentation point, we can't
7067 * get a full msg in so we have to allow splitting.
7069 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
7072 if ((length <= goal_mtu) ||
7073 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
7074 /* Sub-optimial residual don't split in non-eeor mode. */
7078 * If we reach here length is larger than the goal_mtu. Do we wish
7079 * to split it for the sake of packet putting together?
7081 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
7082 /* Its ok to split it */
7083 return (min(goal_mtu, frag_point));
7085 /* Nope, can't split */
7091 sctp_move_to_outqueue(struct sctp_tcb *stcb,
7092 struct sctp_stream_out *strq,
7094 uint32_t frag_point,
7100 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7105 /* Move from the stream to the send_queue keeping track of the total */
7106 struct sctp_association *asoc;
7107 struct sctp_stream_queue_pending *sp;
7108 struct sctp_tmit_chunk *chk;
7109 struct sctp_data_chunk *dchkh;
7110 uint32_t to_move, length;
7111 uint8_t rcv_flags = 0;
7113 uint8_t send_lock_up = 0;
7115 SCTP_TCB_LOCK_ASSERT(stcb);
7118 /* sa_ignore FREED_MEMORY */
7119 sp = TAILQ_FIRST(&strq->outqueue);
7122 if (send_lock_up == 0) {
7123 SCTP_TCB_SEND_LOCK(stcb);
7126 sp = TAILQ_FIRST(&strq->outqueue);
7130 if (strq->last_msg_incomplete) {
7131 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
7133 strq->last_msg_incomplete);
7134 strq->last_msg_incomplete = 0;
7138 SCTP_TCB_SEND_UNLOCK(stcb);
7143 if ((sp->msg_is_complete) && (sp->length == 0)) {
7144 if (sp->sender_all_done) {
7146 * We are doing differed cleanup. Last time through
7147 * when we took all the data the sender_all_done was
7150 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
7151 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
7152 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7153 sp->sender_all_done,
7155 sp->msg_is_complete,
7159 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
7160 SCTP_TCB_SEND_LOCK(stcb);
7163 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7164 TAILQ_REMOVE(&strq->outqueue, sp, next);
7165 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7167 sctp_free_remote_addr(sp->net);
7171 sctp_m_freem(sp->data);
7174 sctp_free_a_strmoq(stcb, sp, so_locked);
7175 /* we can't be locked to it */
7177 stcb->asoc.locked_on_sending = NULL;
7179 SCTP_TCB_SEND_UNLOCK(stcb);
7182 /* back to get the next msg */
7186 * sender just finished this but still holds a
7195 /* is there some to get */
7196 if (sp->length == 0) {
7202 } else if (sp->discard_rest) {
7203 if (send_lock_up == 0) {
7204 SCTP_TCB_SEND_LOCK(stcb);
7207 /* Whack down the size */
7208 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
7209 if ((stcb->sctp_socket != NULL) && \
7210 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
7211 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
7212 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
7215 sctp_m_freem(sp->data);
7217 sp->tail_mbuf = NULL;
7227 some_taken = sp->some_taken;
7228 if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
7229 sp->msg_is_complete = 1;
7232 length = sp->length;
7233 if (sp->msg_is_complete) {
7234 /* The message is complete */
7235 to_move = min(length, frag_point);
7236 if (to_move == length) {
7237 /* All of it fits in the MTU */
7238 if (sp->some_taken) {
7239 rcv_flags |= SCTP_DATA_LAST_FRAG;
7240 sp->put_last_out = 1;
7242 rcv_flags |= SCTP_DATA_NOT_FRAG;
7243 sp->put_last_out = 1;
7246 /* Not all of it fits, we fragment */
7247 if (sp->some_taken == 0) {
7248 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7253 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
7256 * We use a snapshot of length in case it
7257 * is expanding during the compare.
7262 if (to_move >= llen) {
7264 if (send_lock_up == 0) {
7266 * We are taking all of an incomplete msg
7267 * thus we need a send lock.
7269 SCTP_TCB_SEND_LOCK(stcb);
7271 if (sp->msg_is_complete) {
7273 * the sender finished the
7280 if (sp->some_taken == 0) {
7281 rcv_flags |= SCTP_DATA_FIRST_FRAG;
7285 /* Nothing to take. */
7286 if (sp->some_taken) {
7295 /* If we reach here, we can copy out a chunk */
7296 sctp_alloc_a_chunk(stcb, chk);
7298 /* No chunk memory */
7304 * Setup for unordered if needed by looking at the user sent info
7307 if (sp->sinfo_flags & SCTP_UNORDERED) {
7308 rcv_flags |= SCTP_DATA_UNORDERED;
7310 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
7311 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
7312 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
7314 /* clear out the chunk before setting up */
7315 memset(chk, 0, sizeof(*chk));
7316 chk->rec.data.rcv_flags = rcv_flags;
7318 if (to_move >= length) {
7319 /* we think we can steal the whole thing */
7320 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
7321 SCTP_TCB_SEND_LOCK(stcb);
7324 if (to_move < sp->length) {
7325 /* bail, it changed */
7328 chk->data = sp->data;
7329 chk->last_mbuf = sp->tail_mbuf;
7330 /* register the stealing */
7331 sp->data = sp->tail_mbuf = NULL;
7336 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
7337 chk->last_mbuf = NULL;
7338 if (chk->data == NULL) {
7339 sp->some_taken = some_taken;
7340 sctp_free_a_chunk(stcb, chk, so_locked);
7345 #ifdef SCTP_MBUF_LOGGING
7346 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
7347 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
7350 /* Pull off the data */
7351 m_adj(sp->data, to_move);
7352 /* Now lets work our way down and compact it */
7354 while (m && (SCTP_BUF_LEN(m) == 0)) {
7355 sp->data = SCTP_BUF_NEXT(m);
7356 SCTP_BUF_NEXT(m) = NULL;
7357 if (sp->tail_mbuf == m) {
7359 * Freeing tail? TSNH since
7360 * we supposedly were taking less
7361 * than the sp->length.
7364 panic("Huh, freing tail? - TSNH");
7366 SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
7367 sp->tail_mbuf = sp->data = NULL;
7376 if (SCTP_BUF_IS_EXTENDED(chk->data)) {
7377 chk->copy_by_ref = 1;
7379 chk->copy_by_ref = 0;
7382 * get last_mbuf and counts of mb useage This is ugly but hopefully
7383 * its only one mbuf.
7385 if (chk->last_mbuf == NULL) {
7386 chk->last_mbuf = chk->data;
7387 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
7388 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
7391 if (to_move > length) {
7392 /*- This should not happen either
7393 * since we always lower to_move to the size
7394 * of sp->length if its larger.
7397 panic("Huh, how can to_move be larger?");
7399 SCTP_PRINTF("Huh, how can to_move be larger?\n");
7403 atomic_subtract_int(&sp->length, to_move);
7405 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
7406 /* Not enough room for a chunk header, get some */
7409 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
7412 * we're in trouble here. _PREPEND below will free
7413 * all the data if there is no leading space, so we
7414 * must put the data back and restore.
7416 if (send_lock_up == 0) {
7417 SCTP_TCB_SEND_LOCK(stcb);
7420 if (sp->data == NULL) {
7421 /* unsteal the data */
7422 sp->data = chk->data;
7423 sp->tail_mbuf = chk->last_mbuf;
7427 /* reassemble the data */
7429 sp->data = chk->data;
7430 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
7432 sp->some_taken = some_taken;
7433 atomic_add_int(&sp->length, to_move);
7436 sctp_free_a_chunk(stcb, chk, so_locked);
7440 SCTP_BUF_LEN(m) = 0;
7441 SCTP_BUF_NEXT(m) = chk->data;
7443 M_ALIGN(chk->data, 4);
7446 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
7447 if (chk->data == NULL) {
7448 /* HELP, TSNH since we assured it would not above? */
7450 panic("prepend failes HELP?");
7452 SCTP_PRINTF("prepend fails HELP?\n");
7453 sctp_free_a_chunk(stcb, chk, so_locked);
7459 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
7460 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
7461 chk->book_size_scale = 0;
7462 chk->sent = SCTP_DATAGRAM_UNSENT;
7465 chk->asoc = &stcb->asoc;
7466 chk->pad_inplace = 0;
7467 chk->no_fr_allowed = 0;
7468 chk->rec.data.stream_seq = strq->next_sequence_send;
7469 if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
7470 !(rcv_flags & SCTP_DATA_UNORDERED)) {
7471 strq->next_sequence_send++;
7473 chk->rec.data.stream_number = sp->stream;
7474 chk->rec.data.payloadtype = sp->ppid;
7475 chk->rec.data.context = sp->context;
7476 chk->rec.data.doing_fast_retransmit = 0;
7478 chk->rec.data.timetodrop = sp->ts;
7479 chk->flags = sp->act_flags;
7482 chk->whoTo = sp->net;
7483 atomic_add_int(&chk->whoTo->ref_count, 1);
7487 if (sp->holds_key_ref) {
7488 chk->auth_keyid = sp->auth_keyid;
7489 sctp_auth_key_acquire(stcb, chk->auth_keyid);
7490 chk->holds_key_ref = 1;
7492 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
7493 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
7494 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
7495 (uintptr_t) stcb, sp->length,
7496 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
7497 chk->rec.data.TSN_seq);
7499 dchkh = mtod(chk->data, struct sctp_data_chunk *);
7501 * Put the rest of the things in place now. Size was done earlier in
7502 * previous loop prior to padding.
7505 #ifdef SCTP_ASOCLOG_OF_TSNS
7506 SCTP_TCB_LOCK_ASSERT(stcb);
7507 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
7508 asoc->tsn_out_at = 0;
7509 asoc->tsn_out_wrapped = 1;
7511 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
7512 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
7513 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
7514 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
7515 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
7516 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
7517 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
7518 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
7522 dchkh->ch.chunk_type = SCTP_DATA;
7523 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
7524 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
7525 dchkh->dp.stream_id = htons(strq->stream_no);
7526 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
7527 dchkh->dp.protocol_id = chk->rec.data.payloadtype;
7528 dchkh->ch.chunk_length = htons(chk->send_size);
7529 /* Now advance the chk->send_size by the actual pad needed. */
7530 if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
7535 pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
7536 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
7538 chk->last_mbuf = lm;
7539 chk->pad_inplace = 1;
7541 chk->send_size += pads;
7543 if (PR_SCTP_ENABLED(chk->flags)) {
7544 asoc->pr_sctp_cnt++;
7546 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
7547 /* All done pull and kill the message */
7548 atomic_subtract_int(&asoc->stream_queue_cnt, 1);
7549 if (sp->put_last_out == 0) {
7550 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
7551 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
7552 sp->sender_all_done,
7554 sp->msg_is_complete,
7558 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
7559 SCTP_TCB_SEND_LOCK(stcb);
7562 TAILQ_REMOVE(&strq->outqueue, sp, next);
7563 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
7565 sctp_free_remote_addr(sp->net);
7569 sctp_m_freem(sp->data);
7572 sctp_free_a_strmoq(stcb, sp, so_locked);
7574 /* we can't be locked to it */
7576 stcb->asoc.locked_on_sending = NULL;
7578 /* more to go, we are locked */
7581 asoc->chunks_on_out_queue++;
7582 strq->chunks_on_queues++;
7583 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
7584 asoc->send_queue_cnt++;
7587 SCTP_TCB_SEND_UNLOCK(stcb);
7594 sctp_fill_outqueue(struct sctp_tcb *stcb,
7595 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
7596 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7601 struct sctp_association *asoc;
7602 struct sctp_stream_out *strq;
7603 int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
7606 SCTP_TCB_LOCK_ASSERT(stcb);
7608 switch (net->ro._l_addr.sa.sa_family) {
7611 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7616 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
7621 goal_mtu = net->mtu;
7624 /* Need an allowance for the data chunk header too */
7625 goal_mtu -= sizeof(struct sctp_data_chunk);
7627 /* must make even word boundary */
7628 goal_mtu &= 0xfffffffc;
7629 if (asoc->locked_on_sending) {
7630 /* We are stuck on one stream until the message completes. */
7631 strq = asoc->locked_on_sending;
7634 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7637 while ((goal_mtu > 0) && strq) {
7640 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
7641 &giveup, eeor_mode, &bail, so_locked);
7643 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
7646 asoc->locked_on_sending = strq;
7647 if ((moved_how_much == 0) || (giveup) || bail)
7648 /* no more to move for now */
7651 asoc->locked_on_sending = NULL;
7652 if ((giveup) || bail) {
7655 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
7660 total_moved += moved_how_much;
7661 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
7662 goal_mtu &= 0xfffffffc;
7667 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
7669 if (total_moved == 0) {
7670 if ((stcb->asoc.sctp_cmt_on_off == 0) &&
7671 (net == stcb->asoc.primary_destination)) {
7672 /* ran dry for primary network net */
7673 SCTP_STAT_INCR(sctps_primary_randry);
7674 } else if (stcb->asoc.sctp_cmt_on_off > 0) {
7675 /* ran dry with CMT on */
7676 SCTP_STAT_INCR(sctps_cmt_randry);
7682 sctp_fix_ecn_echo(struct sctp_association *asoc)
7684 struct sctp_tmit_chunk *chk;
7686 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7687 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
7688 chk->sent = SCTP_DATAGRAM_UNSENT;
7694 sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
7696 struct sctp_association *asoc;
7697 struct sctp_tmit_chunk *chk;
7698 struct sctp_stream_queue_pending *sp;
7705 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
7706 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
7707 if (sp->net == net) {
7708 sctp_free_remote_addr(sp->net);
7713 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7714 if (chk->whoTo == net) {
7715 sctp_free_remote_addr(chk->whoTo);
7722 sctp_med_chunk_output(struct sctp_inpcb *inp,
7723 struct sctp_tcb *stcb,
7724 struct sctp_association *asoc,
7727 int control_only, int from_where,
7728 struct timeval *now, int *now_filled, int frag_point, int so_locked
7729 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
7735 * Ok this is the generic chunk service queue. we must do the
7736 * following: - Service the stream queue that is next, moving any
7737 * message (note I must get a complete message i.e. FIRST/MIDDLE and
7738 * LAST to the out queue in one pass) and assigning TSN's - Check to
7739 * see if the cwnd/rwnd allows any output, if so we go ahead and
7740 * fomulate and send the low level chunks. Making sure to combine
7741 * any control in the control chunk queue also.
7743 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
7744 struct mbuf *outchain, *endoutchain;
7745 struct sctp_tmit_chunk *chk, *nchk;
7747 /* temp arrays for unlinking */
7748 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
7749 int no_fragmentflg, error;
7750 unsigned int max_rwnd_per_dest, max_send_per_dest;
7751 int one_chunk, hbflag, skip_data_for_this_net;
7752 int asconf, cookie, no_out_cnt;
7753 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
7754 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
7756 uint32_t auth_offset = 0;
7757 struct sctp_auth_chunk *auth = NULL;
7758 uint16_t auth_keyid;
7759 int override_ok = 1;
7760 int skip_fill_up = 0;
7761 int data_auth_reqd = 0;
7764 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
7771 auth_keyid = stcb->asoc.authinfo.active_keyid;
7772 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
7773 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
7774 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
7779 ctl_cnt = no_out_cnt = asconf = cookie = 0;
7781 * First lets prime the pump. For each destination, if there is room
7782 * in the flight size, attempt to pull an MTU's worth out of the
7783 * stream queues into the general send_queue
7785 #ifdef SCTP_AUDITING_ENABLED
7786 sctp_audit_log(0xC2, 2);
7788 SCTP_TCB_LOCK_ASSERT(stcb);
7790 if ((control_only) || (asoc->stream_reset_outstanding))
7795 /* Nothing to possible to send? */
7796 if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
7797 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
7798 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7799 TAILQ_EMPTY(&asoc->send_queue) &&
7800 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
7805 if (asoc->peers_rwnd == 0) {
7806 /* No room in peers rwnd */
7808 if (asoc->total_flight > 0) {
7809 /* we are allowed one chunk in flight */
7813 if (stcb->asoc.ecn_echo_cnt_onq) {
7814 /* Record where a sack goes, if any */
7815 if (no_data_chunks &&
7816 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
7817 /* Nothing but ECNe to send - we don't do that */
7818 goto nothing_to_send;
7820 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7821 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
7822 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
7823 sack_goes_to = chk->whoTo;
7828 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
7829 if (stcb->sctp_socket)
7830 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
7832 max_send_per_dest = 0;
7833 if (no_data_chunks == 0) {
7834 /* How many non-directed chunks are there? */
7835 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
7836 if (chk->whoTo == NULL) {
7838 * We already have non-directed chunks on
7839 * the queue, no need to do a fill-up.
7847 if ((no_data_chunks == 0) &&
7848 (skip_fill_up == 0) &&
7849 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
7850 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
7852 * This for loop we are in takes in each net, if
7853 * its's got space in cwnd and has data sent to it
7854 * (when CMT is off) then it calls
7855 * sctp_fill_outqueue for the net. This gets data on
7856 * the send queue for that network.
7858 * In sctp_fill_outqueue TSN's are assigned and data is
7859 * copied out of the stream buffers. Note mostly
7860 * copy by reference (we hope).
7862 net->window_probe = 0;
7863 if ((net != stcb->asoc.alternate) &&
7864 ((net->dest_state & SCTP_ADDR_PF) ||
7865 (!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
7866 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
7867 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7868 sctp_log_cwnd(stcb, net, 1,
7869 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7873 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
7874 (net->flight_size == 0)) {
7875 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
7877 if (net->flight_size >= net->cwnd) {
7878 /* skip this network, no room - can't fill */
7879 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7880 sctp_log_cwnd(stcb, net, 3,
7881 SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7885 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
7886 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
7888 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
7890 /* memory alloc failure */
7896 /* now service each destination and send out what we can for it */
7897 /* Nothing to send? */
7898 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7899 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7900 TAILQ_EMPTY(&asoc->send_queue)) {
7904 if (asoc->sctp_cmt_on_off > 0) {
7905 /* get the last start point */
7906 start_at = asoc->last_net_cmt_send_started;
7907 if (start_at == NULL) {
7908 /* null so to beginning */
7909 start_at = TAILQ_FIRST(&asoc->nets);
7911 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
7912 if (start_at == NULL) {
7913 start_at = TAILQ_FIRST(&asoc->nets);
7916 asoc->last_net_cmt_send_started = start_at;
7918 start_at = TAILQ_FIRST(&asoc->nets);
7920 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
7921 if (chk->whoTo == NULL) {
7922 if (asoc->alternate) {
7923 chk->whoTo = asoc->alternate;
7925 chk->whoTo = asoc->primary_destination;
7927 atomic_add_int(&chk->whoTo->ref_count, 1);
7930 old_start_at = NULL;
7931 again_one_more_time:
7932 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
7933 /* how much can we send? */
7934 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
7935 if (old_start_at && (old_start_at == net)) {
7936 /* through list ocmpletely. */
7940 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
7941 TAILQ_EMPTY(&asoc->asconf_send_queue) &&
7942 (net->flight_size >= net->cwnd)) {
7944 * Nothing on control or asconf and flight is full,
7945 * we can skip even in the CMT case.
7950 endoutchain = outchain = NULL;
7953 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
7954 skip_data_for_this_net = 1;
7956 skip_data_for_this_net = 0;
7958 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
7961 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
7966 mtu = net->mtu - SCTP_MIN_OVERHEAD;
7976 if (mtu > asoc->peers_rwnd) {
7977 if (asoc->total_flight > 0) {
7978 /* We have a packet in flight somewhere */
7979 r_mtu = asoc->peers_rwnd;
7981 /* We are always allowed to send one MTU out */
7989 /************************/
7990 /* ASCONF transmission */
7991 /************************/
7992 /* Now first lets go through the asconf queue */
7993 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
7994 if (chk->rec.chunk_id.id != SCTP_ASCONF) {
7997 if (chk->whoTo == NULL) {
7998 if (asoc->alternate == NULL) {
7999 if (asoc->primary_destination != net) {
8003 if (asoc->alternate != net) {
8008 if (chk->whoTo != net) {
8012 if (chk->data == NULL) {
8015 if (chk->sent != SCTP_DATAGRAM_UNSENT &&
8016 chk->sent != SCTP_DATAGRAM_RESEND) {
8020 * if no AUTH is yet included and this chunk
8021 * requires it, make sure to account for it. We
8022 * don't apply the size until the AUTH chunk is
8023 * actually added below in case there is no room for
8024 * this chunk. NOTE: we overload the use of "omtu"
8027 if ((auth == NULL) &&
8028 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8029 stcb->asoc.peer_auth_chunks)) {
8030 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8033 /* Here we do NOT factor the r_mtu */
8034 if ((chk->send_size < (int)(mtu - omtu)) ||
8035 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8037 * We probably should glom the mbuf chain
8038 * from the chk->data for control but the
8039 * problem is it becomes yet one more level
8040 * of tracking to do if for some reason
8041 * output fails. Then I have got to
8042 * reconstruct the merged control chain.. el
8043 * yucko.. for now we take the easy way and
8047 * Add an AUTH chunk, if chunk requires it
8048 * save the offset into the chain for AUTH
8050 if ((auth == NULL) &&
8051 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8052 stcb->asoc.peer_auth_chunks))) {
8053 outchain = sctp_add_auth_chunk(outchain,
8058 chk->rec.chunk_id.id);
8059 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8061 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8062 (int)chk->rec.chunk_id.can_take_data,
8063 chk->send_size, chk->copy_by_ref);
8064 if (outchain == NULL) {
8066 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8069 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8070 /* update our MTU size */
8071 if (mtu > (chk->send_size + omtu))
8072 mtu -= (chk->send_size + omtu);
8075 to_out += (chk->send_size + omtu);
8076 /* Do clear IP_DF ? */
8077 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8080 if (chk->rec.chunk_id.can_take_data)
8083 * set hb flag since we can use these for
8089 * should sysctl this: don't bundle data
8090 * with ASCONF since it requires AUTH
8093 chk->sent = SCTP_DATAGRAM_SENT;
8094 if (chk->whoTo == NULL) {
8096 atomic_add_int(&net->ref_count, 1);
8101 * Ok we are out of room but we can
8102 * output without effecting the
8103 * flight size since this little guy
8104 * is a control only packet.
8106 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8108 * do NOT clear the asconf flag as
8109 * it is used to do appropriate
8110 * source address selection.
8112 if (*now_filled == 0) {
8113 (void)SCTP_GETTIME_TIMEVAL(now);
8116 net->last_sent_time = *now;
8118 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8119 (struct sockaddr *)&net->ro._l_addr,
8120 outchain, auth_offset, auth,
8121 stcb->asoc.authinfo.active_keyid,
8122 no_fragmentflg, 0, asconf,
8123 inp->sctp_lport, stcb->rport,
8124 htonl(stcb->asoc.peer_vtag),
8129 * error, we could not
8132 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8133 if (from_where == 0) {
8134 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8136 if (error == ENOBUFS) {
8137 asoc->ifp_had_enobuf = 1;
8138 SCTP_STAT_INCR(sctps_lowlevelerr);
8140 /* error, could not output */
8141 if (error == EHOSTUNREACH) {
8147 sctp_move_chunks_from_net(stcb, net);
8152 asoc->ifp_had_enobuf = 0;
8155 * increase the number we sent, if a
8156 * cookie is sent we don't tell them
8159 outchain = endoutchain = NULL;
8163 *num_out += ctl_cnt;
8164 /* recalc a clean slate and setup */
8165 switch (net->ro._l_addr.sa.sa_family) {
8168 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8173 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8190 /************************/
8191 /* Control transmission */
8192 /************************/
8193 /* Now first lets go through the control queue */
8194 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
8195 if ((sack_goes_to) &&
8196 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
8197 (chk->whoTo != sack_goes_to)) {
8199 * if we have a sack in queue, and we are
8200 * looking at an ecn echo that is NOT queued
8201 * to where the sack is going..
8203 if (chk->whoTo == net) {
8205 * Don't transmit it to where its
8206 * going (current net)
8209 } else if (sack_goes_to == net) {
8211 * But do transmit it to this
8214 goto skip_net_check;
8217 if (chk->whoTo == NULL) {
8218 if (asoc->alternate == NULL) {
8219 if (asoc->primary_destination != net) {
8223 if (asoc->alternate != net) {
8228 if (chk->whoTo != net) {
8233 if (chk->data == NULL) {
8236 if (chk->sent != SCTP_DATAGRAM_UNSENT) {
8238 * It must be unsent. Cookies and ASCONF's
8239 * hang around but there timers will force
8240 * when marked for resend.
8245 * if no AUTH is yet included and this chunk
8246 * requires it, make sure to account for it. We
8247 * don't apply the size until the AUTH chunk is
8248 * actually added below in case there is no room for
8249 * this chunk. NOTE: we overload the use of "omtu"
8252 if ((auth == NULL) &&
8253 sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8254 stcb->asoc.peer_auth_chunks)) {
8255 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8258 /* Here we do NOT factor the r_mtu */
8259 if ((chk->send_size <= (int)(mtu - omtu)) ||
8260 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
8262 * We probably should glom the mbuf chain
8263 * from the chk->data for control but the
8264 * problem is it becomes yet one more level
8265 * of tracking to do if for some reason
8266 * output fails. Then I have got to
8267 * reconstruct the merged control chain.. el
8268 * yucko.. for now we take the easy way and
8272 * Add an AUTH chunk, if chunk requires it
8273 * save the offset into the chain for AUTH
8275 if ((auth == NULL) &&
8276 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
8277 stcb->asoc.peer_auth_chunks))) {
8278 outchain = sctp_add_auth_chunk(outchain,
8283 chk->rec.chunk_id.id);
8284 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8286 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
8287 (int)chk->rec.chunk_id.can_take_data,
8288 chk->send_size, chk->copy_by_ref);
8289 if (outchain == NULL) {
8291 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8294 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8295 /* update our MTU size */
8296 if (mtu > (chk->send_size + omtu))
8297 mtu -= (chk->send_size + omtu);
8300 to_out += (chk->send_size + omtu);
8301 /* Do clear IP_DF ? */
8302 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8305 if (chk->rec.chunk_id.can_take_data)
8307 /* Mark things to be removed, if needed */
8308 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8309 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
8310 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
8311 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
8312 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
8313 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
8314 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
8315 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
8316 (chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
8317 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
8318 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
8319 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
8322 /* remove these chunks at the end */
8323 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
8324 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
8325 /* turn off the timer */
8326 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
8327 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
8329 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
8335 * Other chunks, since they have
8336 * timers running (i.e. COOKIE) we
8337 * just "trust" that it gets sent or
8341 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
8344 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
8346 * Increment ecne send count
8347 * here this means we may be
8348 * over-zealous in our
8349 * counting if the send
8350 * fails, but its the best
8351 * place to do it (we used
8352 * to do it in the queue of
8353 * the chunk, but that did
8354 * not tell how many times
8357 SCTP_STAT_INCR(sctps_sendecne);
8359 chk->sent = SCTP_DATAGRAM_SENT;
8360 if (chk->whoTo == NULL) {
8362 atomic_add_int(&net->ref_count, 1);
8368 * Ok we are out of room but we can
8369 * output without effecting the
8370 * flight size since this little guy
8371 * is a control only packet.
8374 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
8376 * do NOT clear the asconf
8377 * flag as it is used to do
8378 * appropriate source
8379 * address selection.
8383 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8386 /* Only HB or ASCONF advances time */
8388 if (*now_filled == 0) {
8389 (void)SCTP_GETTIME_TIMEVAL(now);
8392 net->last_sent_time = *now;
8395 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
8396 (struct sockaddr *)&net->ro._l_addr,
8399 stcb->asoc.authinfo.active_keyid,
8400 no_fragmentflg, 0, asconf,
8401 inp->sctp_lport, stcb->rport,
8402 htonl(stcb->asoc.peer_vtag),
8407 * error, we could not
8410 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8411 if (from_where == 0) {
8412 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8414 if (error == ENOBUFS) {
8415 asoc->ifp_had_enobuf = 1;
8416 SCTP_STAT_INCR(sctps_lowlevelerr);
8418 if (error == EHOSTUNREACH) {
8424 sctp_move_chunks_from_net(stcb, net);
8429 asoc->ifp_had_enobuf = 0;
8432 * increase the number we sent, if a
8433 * cookie is sent we don't tell them
8436 outchain = endoutchain = NULL;
8440 *num_out += ctl_cnt;
8441 /* recalc a clean slate and setup */
8442 switch (net->ro._l_addr.sa.sa_family) {
8445 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8450 mtu = net->mtu - SCTP_MIN_OVERHEAD;
8467 /* JRI: if dest is in PF state, do not send data to it */
8468 if ((asoc->sctp_cmt_on_off > 0) &&
8469 (net != stcb->asoc.alternate) &&
8470 (net->dest_state & SCTP_ADDR_PF)) {
8473 if (net->flight_size >= net->cwnd) {
8476 if ((asoc->sctp_cmt_on_off > 0) &&
8477 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
8478 (net->flight_size > max_rwnd_per_dest)) {
8482 * We need a specific accounting for the usage of the send
8483 * buffer. We also need to check the number of messages per
8484 * net. For now, this is better than nothing and it disabled
8487 if ((asoc->sctp_cmt_on_off > 0) &&
8488 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
8489 (max_send_per_dest > 0) &&
8490 (net->flight_size > max_send_per_dest)) {
8493 /*********************/
8494 /* Data transmission */
8495 /*********************/
8497 * if AUTH for DATA is required and no AUTH has been added
8498 * yet, account for this in the mtu now... if no data can be
8499 * bundled, this adjustment won't matter anyways since the
8500 * packet will be going out...
8502 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
8503 stcb->asoc.peer_auth_chunks);
8504 if (data_auth_reqd && (auth == NULL)) {
8505 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
8507 /* now lets add any data within the MTU constraints */
8508 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
8511 if (net->mtu > SCTP_MIN_V4_OVERHEAD)
8512 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
8519 if (net->mtu > SCTP_MIN_OVERHEAD)
8520 omtu = net->mtu - SCTP_MIN_OVERHEAD;
8530 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
8531 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
8532 (skip_data_for_this_net == 0)) ||
8534 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
8535 if (no_data_chunks) {
8536 /* let only control go out */
8540 if (net->flight_size >= net->cwnd) {
8541 /* skip this net, no room for data */
8545 if ((chk->whoTo != NULL) &&
8546 (chk->whoTo != net)) {
8547 /* Don't send the chunk on this net */
8550 if (asoc->sctp_cmt_on_off == 0) {
8551 if ((asoc->alternate) &&
8552 (asoc->alternate != net) &&
8553 (chk->whoTo == NULL)) {
8555 } else if ((net != asoc->primary_destination) &&
8556 (asoc->alternate == NULL) &&
8557 (chk->whoTo == NULL)) {
8561 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
8563 * strange, we have a chunk that is
8564 * to big for its destination and
8565 * yet no fragment ok flag.
8566 * Something went wrong when the
8567 * PMTU changed...we did not mark
8568 * this chunk for some reason?? I
8569 * will fix it here by letting IP
8570 * fragment it for now and printing
8571 * a warning. This really should not
8574 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
8575 chk->send_size, mtu);
8576 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
8578 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
8579 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
8580 struct sctp_data_chunk *dchkh;
8582 dchkh = mtod(chk->data, struct sctp_data_chunk *);
8583 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
8585 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
8586 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
8587 /* ok we will add this one */
8590 * Add an AUTH chunk, if chunk
8591 * requires it, save the offset into
8592 * the chain for AUTH
8594 if (data_auth_reqd) {
8596 outchain = sctp_add_auth_chunk(outchain,
8602 auth_keyid = chk->auth_keyid;
8604 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
8605 } else if (override_ok) {
8610 auth_keyid = chk->auth_keyid;
8612 } else if (auth_keyid != chk->auth_keyid) {
8620 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
8621 chk->send_size, chk->copy_by_ref);
8622 if (outchain == NULL) {
8623 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
8624 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
8625 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8628 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
8631 /* upate our MTU size */
8632 /* Do clear IP_DF ? */
8633 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
8636 /* unsigned subtraction of mtu */
8637 if (mtu > chk->send_size)
8638 mtu -= chk->send_size;
8641 /* unsigned subtraction of r_mtu */
8642 if (r_mtu > chk->send_size)
8643 r_mtu -= chk->send_size;
8647 to_out += chk->send_size;
8648 if ((to_out > mx_mtu) && no_fragmentflg) {
8650 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
8652 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
8656 chk->window_probe = 0;
8657 data_list[bundle_at++] = chk;
8658 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
8661 if (chk->sent == SCTP_DATAGRAM_UNSENT) {
8662 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
8663 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
8665 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
8667 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
8668 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
8678 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
8680 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
8681 if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
8682 data_list[0]->window_probe = 1;
8683 net->window_probe = 1;
8689 * Must be sent in order of the
8690 * TSN's (on a network)
8694 } /* for (chunk gather loop for this net) */
8695 } /* if asoc.state OPEN */
8697 /* Is there something to send for this destination? */
8699 /* We may need to start a control timer or two */
8701 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
8704 * do NOT clear the asconf flag as it is
8705 * used to do appropriate source address
8710 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
8713 /* must start a send timer if data is being sent */
8714 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
8716 * no timer running on this destination
8719 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
8721 if (bundle_at || hbflag) {
8722 /* For data/asconf and hb set time */
8723 if (*now_filled == 0) {
8724 (void)SCTP_GETTIME_TIMEVAL(now);
8727 net->last_sent_time = *now;
8729 /* Now send it, if there is anything to send :> */
8730 if ((error = sctp_lowlevel_chunk_output(inp,
8733 (struct sockaddr *)&net->ro._l_addr,
8741 inp->sctp_lport, stcb->rport,
8742 htonl(stcb->asoc.peer_vtag),
8746 /* error, we could not output */
8747 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
8748 if (from_where == 0) {
8749 SCTP_STAT_INCR(sctps_lowlevelerrusr);
8751 if (error == ENOBUFS) {
8752 SCTP_STAT_INCR(sctps_lowlevelerr);
8753 asoc->ifp_had_enobuf = 1;
8755 if (error == EHOSTUNREACH) {
8757 * Destination went unreachable
8760 sctp_move_chunks_from_net(stcb, net);
8764 * I add this line to be paranoid. As far as
8765 * I can tell the continue, takes us back to
8766 * the top of the for, but just to make sure
8767 * I will reset these again here.
8769 ctl_cnt = bundle_at = 0;
8770 continue; /* This takes us back to the
8771 * for() for the nets. */
8773 asoc->ifp_had_enobuf = 0;
8779 *num_out += (ctl_cnt + bundle_at);
8782 /* setup for a RTO measurement */
8783 tsns_sent = data_list[0]->rec.data.TSN_seq;
8784 /* fill time if not already filled */
8785 if (*now_filled == 0) {
8786 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
8788 *now = asoc->time_last_sent;
8790 asoc->time_last_sent = *now;
8792 if (net->rto_needed) {
8793 data_list[0]->do_rtt = 1;
8794 net->rto_needed = 0;
8796 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
8797 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
8803 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8804 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
8807 if (old_start_at == NULL) {
8808 old_start_at = start_at;
8809 start_at = TAILQ_FIRST(&asoc->nets);
8811 goto again_one_more_time;
8814 * At the end there should be no NON timed chunks hanging on this
8817 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
8818 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
8820 if ((*num_out == 0) && (*reason_code == 0)) {
8825 sctp_clean_up_ctl(stcb, asoc, so_locked);
8830 sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
8833 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of
8834 * the control chunk queue.
8836 struct sctp_chunkhdr *hdr;
8837 struct sctp_tmit_chunk *chk;
8840 SCTP_TCB_LOCK_ASSERT(stcb);
8841 sctp_alloc_a_chunk(stcb, chk);
8844 sctp_m_freem(op_err);
8847 chk->copy_by_ref = 0;
8848 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
8849 if (op_err == NULL) {
8850 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
8854 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
8855 chk->send_size += SCTP_BUF_LEN(mat);
8857 chk->sent = SCTP_DATAGRAM_UNSENT;
8859 chk->asoc = &stcb->asoc;
8862 hdr = mtod(op_err, struct sctp_chunkhdr *);
8863 hdr->chunk_type = SCTP_OPERATION_ERROR;
8864 hdr->chunk_flags = 0;
8865 hdr->chunk_length = htons(chk->send_size);
8866 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue,
8869 chk->asoc->ctrl_queue_cnt++;
8873 sctp_send_cookie_echo(struct mbuf *m,
8875 struct sctp_tcb *stcb,
8876 struct sctp_nets *net)
8879 * pull out the cookie and put it at the front of the control chunk
8883 struct mbuf *cookie;
8884 struct sctp_paramhdr parm, *phdr;
8885 struct sctp_chunkhdr *hdr;
8886 struct sctp_tmit_chunk *chk;
8887 uint16_t ptype, plen;
8889 SCTP_TCB_LOCK_ASSERT(stcb);
8890 /* First find the cookie in the param area */
8892 at = offset + sizeof(struct sctp_init_chunk);
8894 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
8898 ptype = ntohs(phdr->param_type);
8899 plen = ntohs(phdr->param_length);
8900 if (ptype == SCTP_STATE_COOKIE) {
8903 /* found the cookie */
8904 if ((pad = (plen % 4))) {
8907 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
8908 if (cookie == NULL) {
8912 #ifdef SCTP_MBUF_LOGGING
8913 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8914 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
8919 at += SCTP_SIZE32(plen);
8921 /* ok, we got the cookie lets change it into a cookie echo chunk */
8922 /* first the change from param to cookie */
8923 hdr = mtod(cookie, struct sctp_chunkhdr *);
8924 hdr->chunk_type = SCTP_COOKIE_ECHO;
8925 hdr->chunk_flags = 0;
8926 /* get the chunk stuff now and place it in the FRONT of the queue */
8927 sctp_alloc_a_chunk(stcb, chk);
8930 sctp_m_freem(cookie);
8933 chk->copy_by_ref = 0;
8934 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
8935 chk->rec.chunk_id.can_take_data = 0;
8936 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
8937 chk->send_size = plen;
8938 chk->sent = SCTP_DATAGRAM_UNSENT;
8940 chk->asoc = &stcb->asoc;
8943 atomic_add_int(&chk->whoTo->ref_count, 1);
8944 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
8945 chk->asoc->ctrl_queue_cnt++;
8950 sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
8954 struct sctp_nets *net)
8957 * take a HB request and make it into a HB ack and send it.
8959 struct mbuf *outchain;
8960 struct sctp_chunkhdr *chdr;
8961 struct sctp_tmit_chunk *chk;
8965 /* must have a net pointer */
8968 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
8969 if (outchain == NULL) {
8970 /* gak out of memory */
8973 #ifdef SCTP_MBUF_LOGGING
8974 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
8975 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
8978 chdr = mtod(outchain, struct sctp_chunkhdr *);
8979 chdr->chunk_type = SCTP_HEARTBEAT_ACK;
8980 chdr->chunk_flags = 0;
8981 if (chk_length % 4) {
8983 uint32_t cpthis = 0;
8986 padlen = 4 - (chk_length % 4);
8987 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
8989 sctp_alloc_a_chunk(stcb, chk);
8992 sctp_m_freem(outchain);
8995 chk->copy_by_ref = 0;
8996 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
8997 chk->rec.chunk_id.can_take_data = 1;
8999 chk->send_size = chk_length;
9000 chk->sent = SCTP_DATAGRAM_UNSENT;
9002 chk->asoc = &stcb->asoc;
9003 chk->data = outchain;
9005 atomic_add_int(&chk->whoTo->ref_count, 1);
9006 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9007 chk->asoc->ctrl_queue_cnt++;
9011 sctp_send_cookie_ack(struct sctp_tcb *stcb)
9013 /* formulate and queue a cookie-ack back to sender */
9014 struct mbuf *cookie_ack;
9015 struct sctp_chunkhdr *hdr;
9016 struct sctp_tmit_chunk *chk;
9018 SCTP_TCB_LOCK_ASSERT(stcb);
9020 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
9021 if (cookie_ack == NULL) {
9025 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
9026 sctp_alloc_a_chunk(stcb, chk);
9029 sctp_m_freem(cookie_ack);
9032 chk->copy_by_ref = 0;
9033 chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
9034 chk->rec.chunk_id.can_take_data = 1;
9036 chk->send_size = sizeof(struct sctp_chunkhdr);
9037 chk->sent = SCTP_DATAGRAM_UNSENT;
9039 chk->asoc = &stcb->asoc;
9040 chk->data = cookie_ack;
9041 if (chk->asoc->last_control_chunk_from != NULL) {
9042 chk->whoTo = chk->asoc->last_control_chunk_from;
9043 atomic_add_int(&chk->whoTo->ref_count, 1);
9047 hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
9048 hdr->chunk_type = SCTP_COOKIE_ACK;
9049 hdr->chunk_flags = 0;
9050 hdr->chunk_length = htons(chk->send_size);
9051 SCTP_BUF_LEN(cookie_ack) = chk->send_size;
9052 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9053 chk->asoc->ctrl_queue_cnt++;
9059 sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
9061 /* formulate and queue a SHUTDOWN-ACK back to the sender */
9062 struct mbuf *m_shutdown_ack;
9063 struct sctp_shutdown_ack_chunk *ack_cp;
9064 struct sctp_tmit_chunk *chk;
9066 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9067 if (m_shutdown_ack == NULL) {
9071 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
9072 sctp_alloc_a_chunk(stcb, chk);
9075 sctp_m_freem(m_shutdown_ack);
9078 chk->copy_by_ref = 0;
9079 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
9080 chk->rec.chunk_id.can_take_data = 1;
9082 chk->send_size = sizeof(struct sctp_chunkhdr);
9083 chk->sent = SCTP_DATAGRAM_UNSENT;
9086 chk->asoc = &stcb->asoc;
9087 chk->data = m_shutdown_ack;
9090 atomic_add_int(&chk->whoTo->ref_count, 1);
9092 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
9093 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
9094 ack_cp->ch.chunk_flags = 0;
9095 ack_cp->ch.chunk_length = htons(chk->send_size);
9096 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
9097 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9098 chk->asoc->ctrl_queue_cnt++;
9103 sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
9105 /* formulate and queue a SHUTDOWN to the sender */
9106 struct mbuf *m_shutdown;
9107 struct sctp_shutdown_chunk *shutdown_cp;
9108 struct sctp_tmit_chunk *chk;
9110 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
9111 if (m_shutdown == NULL) {
9115 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
9116 sctp_alloc_a_chunk(stcb, chk);
9119 sctp_m_freem(m_shutdown);
9122 chk->copy_by_ref = 0;
9123 chk->rec.chunk_id.id = SCTP_SHUTDOWN;
9124 chk->rec.chunk_id.can_take_data = 1;
9126 chk->send_size = sizeof(struct sctp_shutdown_chunk);
9127 chk->sent = SCTP_DATAGRAM_UNSENT;
9130 chk->asoc = &stcb->asoc;
9131 chk->data = m_shutdown;
9134 atomic_add_int(&chk->whoTo->ref_count, 1);
9136 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
9137 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
9138 shutdown_cp->ch.chunk_flags = 0;
9139 shutdown_cp->ch.chunk_length = htons(chk->send_size);
9140 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
9141 SCTP_BUF_LEN(m_shutdown) = chk->send_size;
9142 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9143 chk->asoc->ctrl_queue_cnt++;
9148 sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
9151 * formulate and queue an ASCONF to the peer. ASCONF parameters
9152 * should be queued on the assoc queue.
9154 struct sctp_tmit_chunk *chk;
9155 struct mbuf *m_asconf;
9158 SCTP_TCB_LOCK_ASSERT(stcb);
9160 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
9161 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
9162 /* can't send a new one if there is one in flight already */
9165 /* compose an ASCONF chunk, maximum length is PMTU */
9166 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
9167 if (m_asconf == NULL) {
9170 sctp_alloc_a_chunk(stcb, chk);
9173 sctp_m_freem(m_asconf);
9176 chk->copy_by_ref = 0;
9177 chk->rec.chunk_id.id = SCTP_ASCONF;
9178 chk->rec.chunk_id.can_take_data = 0;
9179 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9180 chk->data = m_asconf;
9181 chk->send_size = len;
9182 chk->sent = SCTP_DATAGRAM_UNSENT;
9184 chk->asoc = &stcb->asoc;
9187 atomic_add_int(&chk->whoTo->ref_count, 1);
9189 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
9190 chk->asoc->ctrl_queue_cnt++;
9195 sctp_send_asconf_ack(struct sctp_tcb *stcb)
9198 * formulate and queue a asconf-ack back to sender. the asconf-ack
9199 * must be stored in the tcb.
9201 struct sctp_tmit_chunk *chk;
9202 struct sctp_asconf_ack *ack, *latest_ack;
9204 struct sctp_nets *net = NULL;
9206 SCTP_TCB_LOCK_ASSERT(stcb);
9207 /* Get the latest ASCONF-ACK */
9208 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
9209 if (latest_ack == NULL) {
9212 if (latest_ack->last_sent_to != NULL &&
9213 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
9214 /* we're doing a retransmission */
9215 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
9218 if (stcb->asoc.last_control_chunk_from == NULL) {
9219 if (stcb->asoc.alternate) {
9220 net = stcb->asoc.alternate;
9222 net = stcb->asoc.primary_destination;
9225 net = stcb->asoc.last_control_chunk_from;
9230 if (stcb->asoc.last_control_chunk_from == NULL) {
9231 if (stcb->asoc.alternate) {
9232 net = stcb->asoc.alternate;
9234 net = stcb->asoc.primary_destination;
9237 net = stcb->asoc.last_control_chunk_from;
9240 latest_ack->last_sent_to = net;
9242 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
9243 if (ack->data == NULL) {
9246 /* copy the asconf_ack */
9247 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
9248 if (m_ack == NULL) {
9249 /* couldn't copy it */
9252 #ifdef SCTP_MBUF_LOGGING
9253 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
9254 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
9258 sctp_alloc_a_chunk(stcb, chk);
9262 sctp_m_freem(m_ack);
9265 chk->copy_by_ref = 0;
9266 chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
9267 chk->rec.chunk_id.can_take_data = 1;
9268 chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
9271 atomic_add_int(&chk->whoTo->ref_count, 1);
9274 chk->send_size = ack->len;
9275 chk->sent = SCTP_DATAGRAM_UNSENT;
9277 chk->asoc = &stcb->asoc;
9279 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
9280 chk->asoc->ctrl_queue_cnt++;
9287 sctp_chunk_retransmission(struct sctp_inpcb *inp,
9288 struct sctp_tcb *stcb,
9289 struct sctp_association *asoc,
9290 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
9291 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9297 * send out one MTU of retransmission. If fast_retransmit is
9298 * happening we ignore the cwnd. Otherwise we obey the cwnd and
9299 * rwnd. For a Cookie or Asconf in the control chunk queue we
9300 * retransmit them by themselves.
9302 * For data chunks we will pick out the lowest TSN's in the sent_queue
9303 * marked for resend and bundle them all together (up to a MTU of
9304 * destination). The address to send to should have been
9305 * selected/changed where the retransmission was marked (i.e. in FR
9306 * or t3-timeout routines).
9308 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
9309 struct sctp_tmit_chunk *chk, *fwd;
9310 struct mbuf *m, *endofchain;
9311 struct sctp_nets *net = NULL;
9312 uint32_t tsns_sent = 0;
9313 int no_fragmentflg, bundle_at, cnt_thru;
9315 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
9316 struct sctp_auth_chunk *auth = NULL;
9317 uint32_t auth_offset = 0;
9318 uint16_t auth_keyid;
9319 int override_ok = 1;
9320 int data_auth_reqd = 0;
9323 SCTP_TCB_LOCK_ASSERT(stcb);
9324 tmr_started = ctl_cnt = bundle_at = error = 0;
9329 endofchain = m = NULL;
9330 auth_keyid = stcb->asoc.authinfo.active_keyid;
9331 #ifdef SCTP_AUDITING_ENABLED
9332 sctp_audit_log(0xC3, 1);
9334 if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
9335 (TAILQ_EMPTY(&asoc->control_send_queue))) {
9336 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
9337 asoc->sent_queue_retran_cnt);
9338 asoc->sent_queue_cnt = 0;
9339 asoc->sent_queue_cnt_removeable = 0;
9340 /* send back 0/0 so we enter normal transmission */
9344 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
9345 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
9346 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
9347 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
9348 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9351 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
9352 if (chk != asoc->str_reset) {
9354 * not eligible for retran if its
9361 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
9365 * Add an AUTH chunk, if chunk requires it save the
9366 * offset into the chain for AUTH
9368 if ((auth == NULL) &&
9369 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
9370 stcb->asoc.peer_auth_chunks))) {
9371 m = sctp_add_auth_chunk(m, &endofchain,
9372 &auth, &auth_offset,
9374 chk->rec.chunk_id.id);
9375 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9377 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9383 /* do we have control chunks to retransmit? */
9385 /* Start a timer no matter if we suceed or fail */
9386 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
9387 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
9388 } else if (chk->rec.chunk_id.id == SCTP_ASCONF)
9389 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
9390 chk->snd_count++; /* update our count */
9391 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
9392 (struct sockaddr *)&chk->whoTo->ro._l_addr, m,
9393 auth_offset, auth, stcb->asoc.authinfo.active_keyid,
9394 no_fragmentflg, 0, 0,
9395 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9396 chk->whoTo->port, NULL,
9399 SCTP_STAT_INCR(sctps_lowlevelerr);
9406 * We don't want to mark the net->sent time here since this
9407 * we use this for HB and retrans cannot measure RTT
9409 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
9411 chk->sent = SCTP_DATAGRAM_SENT;
9412 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
9416 /* Clean up the fwd-tsn list */
9417 sctp_clean_up_ctl(stcb, asoc, so_locked);
9422 * Ok, it is just data retransmission we need to do or that and a
9423 * fwd-tsn with it all.
9425 if (TAILQ_EMPTY(&asoc->sent_queue)) {
9426 return (SCTP_RETRAN_DONE);
9428 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
9429 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
9430 /* not yet open, resend the cookie and that is it */
9433 #ifdef SCTP_AUDITING_ENABLED
9434 sctp_auditing(20, inp, stcb, NULL);
9436 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
9437 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
9438 if (chk->sent != SCTP_DATAGRAM_RESEND) {
9439 /* No, not sent to this net or not ready for rtx */
9442 if (chk->data == NULL) {
9443 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
9444 chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
9447 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
9448 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
9449 /* Gak, we have exceeded max unlucky retran, abort! */
9450 SCTP_PRINTF("Gak, chk->snd_count:%d >= max:%d - send abort\n",
9452 SCTP_BASE_SYSCTL(sctp_max_retran_chunk));
9453 atomic_add_int(&stcb->asoc.refcnt, 1);
9454 sctp_abort_an_association(stcb->sctp_ep, stcb, NULL, so_locked);
9455 SCTP_TCB_LOCK(stcb);
9456 atomic_subtract_int(&stcb->asoc.refcnt, 1);
9457 return (SCTP_RETRAN_EXIT);
9459 /* pick up the net */
9461 switch (net->ro._l_addr.sa.sa_family) {
9464 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
9469 mtu = net->mtu - SCTP_MIN_OVERHEAD;
9478 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
9479 /* No room in peers rwnd */
9482 tsn = asoc->last_acked_seq + 1;
9483 if (tsn == chk->rec.data.TSN_seq) {
9485 * we make a special exception for this
9486 * case. The peer has no rwnd but is missing
9487 * the lowest chunk.. which is probably what
9488 * is holding up the rwnd.
9490 goto one_chunk_around;
9495 if (asoc->peers_rwnd < mtu) {
9497 if ((asoc->peers_rwnd == 0) &&
9498 (asoc->total_flight == 0)) {
9499 chk->window_probe = 1;
9500 chk->whoTo->window_probe = 1;
9503 #ifdef SCTP_AUDITING_ENABLED
9504 sctp_audit_log(0xC3, 2);
9508 net->fast_retran_ip = 0;
9509 if (chk->rec.data.doing_fast_retransmit == 0) {
9511 * if no FR in progress skip destination that have
9512 * flight_size > cwnd.
9514 if (net->flight_size >= net->cwnd) {
9519 * Mark the destination net to have FR recovery
9523 net->fast_retran_ip = 1;
9527 * if no AUTH is yet included and this chunk requires it,
9528 * make sure to account for it. We don't apply the size
9529 * until the AUTH chunk is actually added below in case
9530 * there is no room for this chunk.
9532 if (data_auth_reqd && (auth == NULL)) {
9533 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9537 if ((chk->send_size <= (mtu - dmtu)) ||
9538 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
9539 /* ok we will add this one */
9540 if (data_auth_reqd) {
9542 m = sctp_add_auth_chunk(m,
9548 auth_keyid = chk->auth_keyid;
9550 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9551 } else if (override_ok) {
9552 auth_keyid = chk->auth_keyid;
9554 } else if (chk->auth_keyid != auth_keyid) {
9555 /* different keyid, so done bundling */
9559 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
9561 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9564 /* Do clear IP_DF ? */
9565 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9568 /* upate our MTU size */
9569 if (mtu > (chk->send_size + dmtu))
9570 mtu -= (chk->send_size + dmtu);
9573 data_list[bundle_at++] = chk;
9574 if (one_chunk && (asoc->total_flight <= 0)) {
9575 SCTP_STAT_INCR(sctps_windowprobed);
9578 if (one_chunk == 0) {
9580 * now are there anymore forward from chk to pick
9583 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
9584 if (fwd->sent != SCTP_DATAGRAM_RESEND) {
9585 /* Nope, not for retran */
9588 if (fwd->whoTo != net) {
9589 /* Nope, not the net in question */
9592 if (data_auth_reqd && (auth == NULL)) {
9593 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
9596 if (fwd->send_size <= (mtu - dmtu)) {
9597 if (data_auth_reqd) {
9599 m = sctp_add_auth_chunk(m,
9605 auth_keyid = fwd->auth_keyid;
9607 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
9608 } else if (override_ok) {
9609 auth_keyid = fwd->auth_keyid;
9611 } else if (fwd->auth_keyid != auth_keyid) {
9619 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
9621 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
9624 /* Do clear IP_DF ? */
9625 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
9628 /* upate our MTU size */
9629 if (mtu > (fwd->send_size + dmtu))
9630 mtu -= (fwd->send_size + dmtu);
9633 data_list[bundle_at++] = fwd;
9634 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
9638 /* can't fit so we are done */
9643 /* Is there something to send for this destination? */
9646 * No matter if we fail/or suceed we should start a
9647 * timer. A failure is like a lost IP packet :-)
9649 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9651 * no timer running on this destination
9654 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9657 /* Now lets send it, if there is anything to send :> */
9658 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
9659 (struct sockaddr *)&net->ro._l_addr, m,
9660 auth_offset, auth, auth_keyid,
9661 no_fragmentflg, 0, 0,
9662 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
9666 /* error, we could not output */
9667 SCTP_STAT_INCR(sctps_lowlevelerr);
9675 * We don't want to mark the net->sent time here
9676 * since this we use this for HB and retrans cannot
9679 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
9681 /* For auto-close */
9683 if (*now_filled == 0) {
9684 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
9685 *now = asoc->time_last_sent;
9688 asoc->time_last_sent = *now;
9690 *cnt_out += bundle_at;
9691 #ifdef SCTP_AUDITING_ENABLED
9692 sctp_audit_log(0xC4, bundle_at);
9695 tsns_sent = data_list[0]->rec.data.TSN_seq;
9697 for (i = 0; i < bundle_at; i++) {
9698 SCTP_STAT_INCR(sctps_sendretransdata);
9699 data_list[i]->sent = SCTP_DATAGRAM_SENT;
9701 * When we have a revoked data, and we
9702 * retransmit it, then we clear the revoked
9703 * flag since this flag dictates if we
9704 * subtracted from the fs
9706 if (data_list[i]->rec.data.chunk_was_revoked) {
9707 /* Deflate the cwnd */
9708 data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
9709 data_list[i]->rec.data.chunk_was_revoked = 0;
9711 data_list[i]->snd_count++;
9712 sctp_ucount_decr(asoc->sent_queue_retran_cnt);
9713 /* record the time */
9714 data_list[i]->sent_rcv_time = asoc->time_last_sent;
9715 if (data_list[i]->book_size_scale) {
9717 * need to double the book size on
9720 data_list[i]->book_size_scale = 0;
9722 * Since we double the booksize, we
9723 * must also double the output queue
9724 * size, since this get shrunk when
9725 * we free by this amount.
9727 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
9728 data_list[i]->book_size *= 2;
9732 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
9733 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
9734 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
9736 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
9737 (uint32_t) (data_list[i]->send_size +
9738 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
9740 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
9741 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
9742 data_list[i]->whoTo->flight_size,
9743 data_list[i]->book_size,
9744 (uintptr_t) data_list[i]->whoTo,
9745 data_list[i]->rec.data.TSN_seq);
9747 sctp_flight_size_increase(data_list[i]);
9748 sctp_total_flight_increase(stcb, data_list[i]);
9749 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
9750 /* SWS sender side engages */
9751 asoc->peers_rwnd = 0;
9754 (data_list[i]->rec.data.doing_fast_retransmit)) {
9755 SCTP_STAT_INCR(sctps_sendfastretrans);
9756 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
9757 (tmr_started == 0)) {
9759 * ok we just fast-retrans'd
9760 * the lowest TSN, i.e the
9761 * first on the list. In
9762 * this case we want to give
9763 * some more time to get a
9764 * SACK back without a
9767 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
9768 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
9769 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
9773 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
9774 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
9776 #ifdef SCTP_AUDITING_ENABLED
9777 sctp_auditing(21, inp, stcb, NULL);
9783 if (asoc->sent_queue_retran_cnt <= 0) {
9784 /* all done we have no more to retran */
9785 asoc->sent_queue_retran_cnt = 0;
9789 /* No more room in rwnd */
9792 /* stop the for loop here. we sent out a packet */
9799 sctp_timer_validation(struct sctp_inpcb *inp,
9800 struct sctp_tcb *stcb,
9801 struct sctp_association *asoc)
9803 struct sctp_nets *net;
9805 /* Validate that a timer is running somewhere */
9806 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9807 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
9808 /* Here is a timer */
9812 SCTP_TCB_LOCK_ASSERT(stcb);
9813 /* Gak, we did not have a timer somewhere */
9814 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
9815 if (asoc->alternate) {
9816 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
9818 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
9824 sctp_chunk_output(struct sctp_inpcb *inp,
9825 struct sctp_tcb *stcb,
9828 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
9834 * Ok this is the generic chunk service queue. we must do the
9836 * - See if there are retransmits pending, if so we must
9838 * - Service the stream queue that is next, moving any
9839 * message (note I must get a complete message i.e.
9840 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
9842 * - Check to see if the cwnd/rwnd allows any output, if so we
9843 * go ahead and fomulate and send the low level chunks. Making sure
9844 * to combine any control in the control chunk queue also.
9846 struct sctp_association *asoc;
9847 struct sctp_nets *net;
9848 int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
9849 unsigned int burst_cnt = 0;
9853 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
9856 unsigned int tot_frs = 0;
9859 /* The Nagle algorithm is only applied when handling a send call. */
9860 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
9861 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
9869 SCTP_TCB_LOCK_ASSERT(stcb);
9871 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
9873 if ((un_sent <= 0) &&
9874 (TAILQ_EMPTY(&asoc->control_send_queue)) &&
9875 (TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
9876 (asoc->sent_queue_retran_cnt == 0)) {
9877 /* Nothing to do unless there is something to be sent left */
9881 * Do we have something to send, data or control AND a sack timer
9882 * running, if so piggy-back the sack.
9884 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
9885 sctp_send_sack(stcb, so_locked);
9886 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
9888 while (asoc->sent_queue_retran_cnt) {
9890 * Ok, it is retransmission time only, we send out only ONE
9891 * packet with a single call off to the retran code.
9893 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
9895 * Special hook for handling cookiess discarded
9896 * by peer that carried data. Send cookie-ack only
9897 * and then the next call with get the retran's.
9899 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9901 &now, &now_filled, frag_point, so_locked);
9903 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
9904 /* if its not from a HB then do it */
9906 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
9912 * its from any other place, we don't allow retran
9913 * output (only control)
9918 /* Can't send anymore */
9920 * now lets push out control by calling med-level
9921 * output once. this assures that we WILL send HB's
9924 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
9926 &now, &now_filled, frag_point, so_locked);
9927 #ifdef SCTP_AUDITING_ENABLED
9928 sctp_auditing(8, inp, stcb, NULL);
9930 sctp_timer_validation(inp, stcb, asoc);
9935 * The count was off.. retran is not happening so do
9936 * the normal retransmission.
9938 #ifdef SCTP_AUDITING_ENABLED
9939 sctp_auditing(9, inp, stcb, NULL);
9941 if (ret == SCTP_RETRAN_EXIT) {
9946 if (from_where == SCTP_OUTPUT_FROM_T3) {
9947 /* Only one transmission allowed out of a timeout */
9948 #ifdef SCTP_AUDITING_ENABLED
9949 sctp_auditing(10, inp, stcb, NULL);
9951 /* Push out any control */
9952 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
9953 &now, &now_filled, frag_point, so_locked);
9956 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
9957 /* Hit FR burst limit */
9960 if ((num_out == 0) && (ret == 0)) {
9961 /* No more retrans to send */
9965 #ifdef SCTP_AUDITING_ENABLED
9966 sctp_auditing(12, inp, stcb, NULL);
9968 /* Check for bad destinations, if they exist move chunks around. */
9969 TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
9970 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
9972 * if possible move things off of this address we
9973 * still may send below due to the dormant state but
9974 * we try to find an alternate address to send to
9975 * and if we have one we move all queued data on the
9976 * out wheel to this alternate address.
9978 if (net->ref_count > 1)
9979 sctp_move_chunks_from_net(stcb, net);
9982 * if ((asoc->sat_network) || (net->addr_is_local))
9983 * { burst_limit = asoc->max_burst *
9984 * SCTP_SAT_NETWORK_BURST_INCR; }
9986 if (asoc->max_burst > 0) {
9987 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
9988 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
9990 * JRS - Use the congestion
9991 * control given in the
9992 * congestion control module
9994 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
9995 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
9996 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
9998 SCTP_STAT_INCR(sctps_maxburstqueued);
10000 net->fast_retran_ip = 0;
10002 if (net->flight_size == 0) {
10004 * Should be decaying the
10016 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
10017 &reason_code, 0, from_where,
10018 &now, &now_filled, frag_point, so_locked);
10020 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
10021 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10022 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
10024 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10025 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
10026 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
10030 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
10032 tot_out += num_out;
10034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10035 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
10036 if (num_out == 0) {
10037 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
10042 * When the Nagle algorithm is used, look at how
10043 * much is unsent, then if its smaller than an MTU
10044 * and we have data in flight we stop, except if we
10045 * are handling a fragmented user message.
10047 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
10048 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
10049 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
10050 (stcb->asoc.total_flight > 0) &&
10051 ((stcb->asoc.locked_on_sending == NULL) ||
10052 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
10056 if (TAILQ_EMPTY(&asoc->control_send_queue) &&
10057 TAILQ_EMPTY(&asoc->send_queue) &&
10058 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
10059 /* Nothing left to send */
10062 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
10063 /* Nothing left to send */
10066 } while (num_out &&
10067 ((asoc->max_burst == 0) ||
10068 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
10069 (burst_cnt < asoc->max_burst)));
10071 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
10072 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
10073 SCTP_STAT_INCR(sctps_maxburstqueued);
10074 asoc->burst_limit_applied = 1;
10075 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
10076 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
10079 asoc->burst_limit_applied = 0;
10082 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
10083 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
10085 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
10089 * Now we need to clean up the control chunk chain if a ECNE is on
10090 * it. It must be marked as UNSENT again so next call will continue
10091 * to send it until such time that we get a CWR, to remove it.
10093 if (stcb->asoc.ecn_echo_cnt_onq)
10094 sctp_fix_ecn_echo(asoc);
10101 struct sctp_inpcb *inp,
10103 struct sockaddr *addr,
10104 struct mbuf *control,
10109 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10112 if (inp->sctp_socket == NULL) {
10113 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
10116 return (sctp_sosend(inp->sctp_socket,
10118 (struct uio *)NULL,
10126 send_forward_tsn(struct sctp_tcb *stcb,
10127 struct sctp_association *asoc)
10129 struct sctp_tmit_chunk *chk;
10130 struct sctp_forward_tsn_chunk *fwdtsn;
10131 uint32_t advance_peer_ack_point;
10133 SCTP_TCB_LOCK_ASSERT(stcb);
10134 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10135 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
10136 /* mark it to unsent */
10137 chk->sent = SCTP_DATAGRAM_UNSENT;
10138 chk->snd_count = 0;
10139 /* Do we correct its output location? */
10141 sctp_free_remote_addr(chk->whoTo);
10144 goto sctp_fill_in_rest;
10147 /* Ok if we reach here we must build one */
10148 sctp_alloc_a_chunk(stcb, chk);
10152 asoc->fwd_tsn_cnt++;
10153 chk->copy_by_ref = 0;
10154 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
10155 chk->rec.chunk_id.can_take_data = 0;
10159 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
10160 if (chk->data == NULL) {
10161 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
10164 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
10165 chk->sent = SCTP_DATAGRAM_UNSENT;
10166 chk->snd_count = 0;
10167 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
10168 asoc->ctrl_queue_cnt++;
10171 * Here we go through and fill out the part that deals with
10172 * stream/seq of the ones we skip.
10174 SCTP_BUF_LEN(chk->data) = 0;
10176 struct sctp_tmit_chunk *at, *tp1, *last;
10177 struct sctp_strseq *strseq;
10178 unsigned int cnt_of_space, i, ovh;
10179 unsigned int space_needed;
10180 unsigned int cnt_of_skipped = 0;
10182 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
10183 if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
10184 (at->sent != SCTP_DATAGRAM_NR_ACKED)) {
10185 /* no more to look at */
10188 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10189 /* We don't report these */
10194 space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
10195 (cnt_of_skipped * sizeof(struct sctp_strseq)));
10197 cnt_of_space = M_TRAILINGSPACE(chk->data);
10199 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
10200 ovh = SCTP_MIN_OVERHEAD;
10202 ovh = SCTP_MIN_V4_OVERHEAD;
10204 if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
10205 /* trim to a mtu size */
10206 cnt_of_space = asoc->smallest_mtu - ovh;
10208 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10209 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10210 0xff, 0, cnt_of_skipped,
10211 asoc->advanced_peer_ack_point);
10214 advance_peer_ack_point = asoc->advanced_peer_ack_point;
10215 if (cnt_of_space < space_needed) {
10217 * ok we must trim down the chunk by lowering the
10218 * advance peer ack point.
10220 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10221 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10222 0xff, 0xff, cnt_of_space,
10225 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
10226 cnt_of_skipped /= sizeof(struct sctp_strseq);
10228 * Go through and find the TSN that will be the one
10231 at = TAILQ_FIRST(&asoc->sent_queue);
10233 for (i = 0; i < cnt_of_skipped; i++) {
10234 tp1 = TAILQ_NEXT(at, sctp_next);
10241 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
10242 sctp_misc_ints(SCTP_FWD_TSN_CHECK,
10243 0xff, cnt_of_skipped, at->rec.data.TSN_seq,
10244 asoc->advanced_peer_ack_point);
10248 * last now points to last one I can report, update
10252 advance_peer_ack_point = last->rec.data.TSN_seq;
10253 space_needed = sizeof(struct sctp_forward_tsn_chunk) +
10254 cnt_of_skipped * sizeof(struct sctp_strseq);
10256 chk->send_size = space_needed;
10257 /* Setup the chunk */
10258 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
10259 fwdtsn->ch.chunk_length = htons(chk->send_size);
10260 fwdtsn->ch.chunk_flags = 0;
10261 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
10262 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
10263 SCTP_BUF_LEN(chk->data) = chk->send_size;
10266 * Move pointer to after the fwdtsn and transfer to the
10269 strseq = (struct sctp_strseq *)fwdtsn;
10271 * Now populate the strseq list. This is done blindly
10272 * without pulling out duplicate stream info. This is
10273 * inefficent but won't harm the process since the peer will
10274 * look at these in sequence and will thus release anything.
10275 * It could mean we exceed the PMTU and chop off some that
10276 * we could have included.. but this is unlikely (aka 1432/4
10277 * would mean 300+ stream seq's would have to be reported in
10278 * one FWD-TSN. With a bit of work we can later FIX this to
10279 * optimize and pull out duplcates.. but it does add more
10280 * overhead. So for now... not!
10282 at = TAILQ_FIRST(&asoc->sent_queue);
10283 for (i = 0; i < cnt_of_skipped; i++) {
10284 tp1 = TAILQ_NEXT(at, sctp_next);
10287 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
10288 /* We don't report these */
10293 if (at->rec.data.TSN_seq == advance_peer_ack_point) {
10294 at->rec.data.fwd_tsn_cnt = 0;
10296 strseq->stream = ntohs(at->rec.data.stream_number);
10297 strseq->sequence = ntohs(at->rec.data.stream_seq);
10306 sctp_send_sack(struct sctp_tcb *stcb, int so_locked
10307 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10313 * Queue up a SACK or NR-SACK in the control queue.
10314 * We must first check to see if a SACK or NR-SACK is
10315 * somehow on the control queue.
10316 * If so, we will take and and remove the old one.
10318 struct sctp_association *asoc;
10319 struct sctp_tmit_chunk *chk, *a_chk;
10320 struct sctp_sack_chunk *sack;
10321 struct sctp_nr_sack_chunk *nr_sack;
10322 struct sctp_gap_ack_block *gap_descriptor;
10323 struct sack_track *selector;
10328 int limit_reached = 0;
10329 unsigned int i, siz, j;
10330 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
10333 uint32_t highest_tsn;
10338 if (stcb->asoc.nrsack_supported == 1) {
10339 type = SCTP_NR_SELECTIVE_ACK;
10341 type = SCTP_SELECTIVE_ACK;
10344 asoc = &stcb->asoc;
10345 SCTP_TCB_LOCK_ASSERT(stcb);
10346 if (asoc->last_data_chunk_from == NULL) {
10347 /* Hmm we never received anything */
10350 sctp_slide_mapping_arrays(stcb);
10351 sctp_set_rwnd(stcb, asoc);
10352 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
10353 if (chk->rec.chunk_id.id == type) {
10354 /* Hmm, found a sack already on queue, remove it */
10355 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
10356 asoc->ctrl_queue_cnt--;
10359 sctp_m_freem(a_chk->data);
10360 a_chk->data = NULL;
10362 if (a_chk->whoTo) {
10363 sctp_free_remote_addr(a_chk->whoTo);
10364 a_chk->whoTo = NULL;
10369 if (a_chk == NULL) {
10370 sctp_alloc_a_chunk(stcb, a_chk);
10371 if (a_chk == NULL) {
10372 /* No memory so we drop the idea, and set a timer */
10373 if (stcb->asoc.delayed_ack) {
10374 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10375 stcb->sctp_ep, stcb, NULL,
10376 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
10377 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10378 stcb->sctp_ep, stcb, NULL);
10380 stcb->asoc.send_sack = 1;
10384 a_chk->copy_by_ref = 0;
10385 a_chk->rec.chunk_id.id = type;
10386 a_chk->rec.chunk_id.can_take_data = 1;
10388 /* Clear our pkt counts */
10389 asoc->data_pkts_seen = 0;
10392 a_chk->asoc = asoc;
10393 a_chk->snd_count = 0;
10394 a_chk->send_size = 0; /* fill in later */
10395 a_chk->sent = SCTP_DATAGRAM_UNSENT;
10396 a_chk->whoTo = NULL;
10398 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
10400 * Ok, the destination for the SACK is unreachable, lets see if
10401 * we can select an alternate to asoc->last_data_chunk_from
10403 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
10404 if (a_chk->whoTo == NULL) {
10405 /* Nope, no alternate */
10406 a_chk->whoTo = asoc->last_data_chunk_from;
10409 a_chk->whoTo = asoc->last_data_chunk_from;
10411 if (a_chk->whoTo) {
10412 atomic_add_int(&a_chk->whoTo->ref_count, 1);
10414 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
10415 highest_tsn = asoc->highest_tsn_inside_map;
10417 highest_tsn = asoc->highest_tsn_inside_nr_map;
10419 if (highest_tsn == asoc->cumulative_tsn) {
10421 if (type == SCTP_SELECTIVE_ACK) {
10422 space_req = sizeof(struct sctp_sack_chunk);
10424 space_req = sizeof(struct sctp_nr_sack_chunk);
10427 /* gaps get a cluster */
10428 space_req = MCLBYTES;
10430 /* Ok now lets formulate a MBUF with our sack */
10431 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
10432 if ((a_chk->data == NULL) ||
10433 (a_chk->whoTo == NULL)) {
10434 /* rats, no mbuf memory */
10436 /* was a problem with the destination */
10437 sctp_m_freem(a_chk->data);
10438 a_chk->data = NULL;
10440 sctp_free_a_chunk(stcb, a_chk, so_locked);
10441 /* sa_ignore NO_NULL_CHK */
10442 if (stcb->asoc.delayed_ack) {
10443 sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
10444 stcb->sctp_ep, stcb, NULL,
10445 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
10446 sctp_timer_start(SCTP_TIMER_TYPE_RECV,
10447 stcb->sctp_ep, stcb, NULL);
10449 stcb->asoc.send_sack = 1;
10453 /* ok, lets go through and fill it in */
10454 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
10455 space = M_TRAILINGSPACE(a_chk->data);
10456 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
10457 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
10459 limit = mtod(a_chk->data, caddr_t);
10464 if ((asoc->sctp_cmt_on_off > 0) &&
10465 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
10467 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
10468 * received, then set high bit to 1, else 0. Reset
10471 flags |= (asoc->cmt_dac_pkts_rcvd << 6);
10472 asoc->cmt_dac_pkts_rcvd = 0;
10474 #ifdef SCTP_ASOCLOG_OF_TSNS
10475 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
10476 stcb->asoc.cumack_log_atsnt++;
10477 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
10478 stcb->asoc.cumack_log_atsnt = 0;
10481 /* reset the readers interpretation */
10482 stcb->freed_by_sorcv_sincelast = 0;
10484 if (type == SCTP_SELECTIVE_ACK) {
10485 sack = mtod(a_chk->data, struct sctp_sack_chunk *);
10487 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
10488 if (highest_tsn > asoc->mapping_array_base_tsn) {
10489 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10491 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
10495 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
10496 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
10497 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
10498 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10500 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
10504 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10507 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10509 if (((type == SCTP_SELECTIVE_ACK) &&
10510 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
10511 ((type == SCTP_NR_SELECTIVE_ACK) &&
10512 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
10513 /* we have a gap .. maybe */
10514 for (i = 0; i < siz; i++) {
10515 tsn_map = asoc->mapping_array[i];
10516 if (type == SCTP_SELECTIVE_ACK) {
10517 tsn_map |= asoc->nr_mapping_array[i];
10521 * Clear all bits corresponding to TSNs
10522 * smaller or equal to the cumulative TSN.
10524 tsn_map &= (~0 << (1 - offset));
10526 selector = &sack_array[tsn_map];
10527 if (mergeable && selector->right_edge) {
10529 * Backup, left and right edges were ok to
10535 if (selector->num_entries == 0)
10538 for (j = 0; j < selector->num_entries; j++) {
10539 if (mergeable && selector->right_edge) {
10541 * do a merge by NOT setting
10547 * no merge, set the left
10551 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10553 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10556 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10562 if (selector->left_edge) {
10566 if (limit_reached) {
10567 /* Reached the limit stop */
10573 if ((type == SCTP_NR_SELECTIVE_ACK) &&
10574 (limit_reached == 0)) {
10578 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
10579 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
10581 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
10584 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
10587 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
10589 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
10590 /* we have a gap .. maybe */
10591 for (i = 0; i < siz; i++) {
10592 tsn_map = asoc->nr_mapping_array[i];
10595 * Clear all bits corresponding to
10596 * TSNs smaller or equal to the
10599 tsn_map &= (~0 << (1 - offset));
10601 selector = &sack_array[tsn_map];
10602 if (mergeable && selector->right_edge) {
10604 * Backup, left and right edges were
10607 num_nr_gap_blocks--;
10610 if (selector->num_entries == 0)
10613 for (j = 0; j < selector->num_entries; j++) {
10614 if (mergeable && selector->right_edge) {
10616 * do a merge by NOT
10623 * no merge, set the
10627 gap_descriptor->start = htons((selector->gaps[j].start + offset));
10629 gap_descriptor->end = htons((selector->gaps[j].end + offset));
10630 num_nr_gap_blocks++;
10632 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
10638 if (selector->left_edge) {
10642 if (limit_reached) {
10643 /* Reached the limit stop */
10650 /* now we must add any dups we are going to report. */
10651 if ((limit_reached == 0) && (asoc->numduptsns)) {
10652 dup = (uint32_t *) gap_descriptor;
10653 for (i = 0; i < asoc->numduptsns; i++) {
10654 *dup = htonl(asoc->dup_tsns[i]);
10657 if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
10662 asoc->numduptsns = 0;
10665 * now that the chunk is prepared queue it to the control chunk
10668 if (type == SCTP_SELECTIVE_ACK) {
10669 a_chk->send_size = sizeof(struct sctp_sack_chunk) +
10670 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10671 num_dups * sizeof(int32_t);
10672 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10673 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10674 sack->sack.a_rwnd = htonl(asoc->my_rwnd);
10675 sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
10676 sack->sack.num_dup_tsns = htons(num_dups);
10677 sack->ch.chunk_type = type;
10678 sack->ch.chunk_flags = flags;
10679 sack->ch.chunk_length = htons(a_chk->send_size);
10681 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
10682 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
10683 num_dups * sizeof(int32_t);
10684 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
10685 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
10686 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
10687 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
10688 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
10689 nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
10690 nr_sack->nr_sack.reserved = 0;
10691 nr_sack->ch.chunk_type = type;
10692 nr_sack->ch.chunk_flags = flags;
10693 nr_sack->ch.chunk_length = htons(a_chk->send_size);
10695 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
10696 asoc->my_last_reported_rwnd = asoc->my_rwnd;
10697 asoc->ctrl_queue_cnt++;
10698 asoc->send_sack = 0;
10699 SCTP_STAT_INCR(sctps_sendsacks);
10704 sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
10705 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
10710 struct mbuf *m_abort, *m, *m_last;
10711 struct mbuf *m_out, *m_end = NULL;
10712 struct sctp_abort_chunk *abort;
10713 struct sctp_auth_chunk *auth = NULL;
10714 struct sctp_nets *net;
10716 uint32_t auth_offset = 0;
10717 uint16_t cause_len, chunk_len, padding_len;
10719 SCTP_TCB_LOCK_ASSERT(stcb);
10721 * Add an AUTH chunk, if chunk requires it and save the offset into
10722 * the chain for AUTH
10724 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
10725 stcb->asoc.peer_auth_chunks)) {
10726 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
10727 stcb, SCTP_ABORT_ASSOCIATION);
10728 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10732 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
10733 if (m_abort == NULL) {
10735 sctp_m_freem(m_out);
10738 sctp_m_freem(operr);
10742 /* link in any error */
10743 SCTP_BUF_NEXT(m_abort) = operr;
10746 for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
10747 cause_len += (uint16_t) SCTP_BUF_LEN(m);
10748 if (SCTP_BUF_NEXT(m) == NULL) {
10752 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
10753 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
10754 padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
10755 if (m_out == NULL) {
10756 /* NO Auth chunk prepended, so reserve space in front */
10757 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
10760 /* Put AUTH chunk at the front of the chain */
10761 SCTP_BUF_NEXT(m_end) = m_abort;
10763 if (stcb->asoc.alternate) {
10764 net = stcb->asoc.alternate;
10766 net = stcb->asoc.primary_destination;
10768 /* Fill in the ABORT chunk header. */
10769 abort = mtod(m_abort, struct sctp_abort_chunk *);
10770 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
10771 if (stcb->asoc.peer_vtag == 0) {
10772 /* This happens iff the assoc is in COOKIE-WAIT state. */
10773 vtag = stcb->asoc.my_vtag;
10774 abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
10776 vtag = stcb->asoc.peer_vtag;
10777 abort->ch.chunk_flags = 0;
10779 abort->ch.chunk_length = htons(chunk_len);
10780 /* Add padding, if necessary. */
10781 if (padding_len > 0) {
10782 if ((m_last == NULL) ||
10783 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
10784 sctp_m_freem(m_out);
10788 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10789 (struct sockaddr *)&net->ro._l_addr,
10790 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
10791 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
10792 stcb->asoc.primary_destination->port, NULL,
10795 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10799 sctp_send_shutdown_complete(struct sctp_tcb *stcb,
10800 struct sctp_nets *net,
10803 /* formulate and SEND a SHUTDOWN-COMPLETE */
10804 struct mbuf *m_shutdown_comp;
10805 struct sctp_shutdown_complete_chunk *shutdown_complete;
10809 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
10810 if (m_shutdown_comp == NULL) {
10814 if (reflect_vtag) {
10815 flags = SCTP_HAD_NO_TCB;
10816 vtag = stcb->asoc.my_vtag;
10819 vtag = stcb->asoc.peer_vtag;
10821 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
10822 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
10823 shutdown_complete->ch.chunk_flags = flags;
10824 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
10825 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
10826 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
10827 (struct sockaddr *)&net->ro._l_addr,
10828 m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
10829 stcb->sctp_ep->sctp_lport, stcb->rport,
10833 SCTP_SO_NOT_LOCKED);
10834 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
10839 sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
10840 struct sctphdr *sh, uint32_t vtag,
10841 uint8_t type, struct mbuf *cause,
10842 uint8_t mflowtype, uint32_t mflowid,
10843 uint32_t vrf_id, uint16_t port)
10845 struct mbuf *o_pak;
10847 struct sctphdr *shout;
10848 struct sctp_chunkhdr *ch;
10850 #if defined(INET) || defined(INET6)
10851 struct udphdr *udp;
10855 int len, cause_len, padding_len;
10858 struct sockaddr_in *src_sin, *dst_sin;
10863 struct sockaddr_in6 *src_sin6, *dst_sin6;
10864 struct ip6_hdr *ip6;
10868 /* Compute the length of the cause and add final padding. */
10870 if (cause != NULL) {
10871 struct mbuf *m_at, *m_last = NULL;
10873 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
10874 if (SCTP_BUF_NEXT(m_at) == NULL)
10876 cause_len += SCTP_BUF_LEN(m_at);
10878 padding_len = cause_len % 4;
10879 if (padding_len != 0) {
10880 padding_len = 4 - padding_len;
10882 if (padding_len != 0) {
10883 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
10884 sctp_m_freem(cause);
10891 /* Get an mbuf for the header. */
10892 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
10893 switch (dst->sa_family) {
10896 len += sizeof(struct ip);
10901 len += sizeof(struct ip6_hdr);
10907 #if defined(INET) || defined(INET6)
10909 len += sizeof(struct udphdr);
10912 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
10913 if (mout == NULL) {
10915 sctp_m_freem(cause);
10919 SCTP_BUF_RESV_UF(mout, max_linkhdr);
10920 SCTP_BUF_LEN(mout) = len;
10921 SCTP_BUF_NEXT(mout) = cause;
10922 mout->m_pkthdr.flowid = mflowid;
10923 M_HASHTYPE_SET(mout, mflowtype);
10930 switch (dst->sa_family) {
10933 src_sin = (struct sockaddr_in *)src;
10934 dst_sin = (struct sockaddr_in *)dst;
10935 ip = mtod(mout, struct ip *);
10936 ip->ip_v = IPVERSION;
10937 ip->ip_hl = (sizeof(struct ip) >> 2);
10941 ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
10943 ip->ip_p = IPPROTO_UDP;
10945 ip->ip_p = IPPROTO_SCTP;
10947 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
10948 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
10950 len = sizeof(struct ip);
10951 shout = (struct sctphdr *)((caddr_t)ip + len);
10956 src_sin6 = (struct sockaddr_in6 *)src;
10957 dst_sin6 = (struct sockaddr_in6 *)dst;
10958 ip6 = mtod(mout, struct ip6_hdr *);
10959 ip6->ip6_flow = htonl(0x60000000);
10960 if (V_ip6_auto_flowlabel) {
10961 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
10963 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
10965 ip6->ip6_nxt = IPPROTO_UDP;
10967 ip6->ip6_nxt = IPPROTO_SCTP;
10969 ip6->ip6_src = dst_sin6->sin6_addr;
10970 ip6->ip6_dst = src_sin6->sin6_addr;
10971 len = sizeof(struct ip6_hdr);
10972 shout = (struct sctphdr *)((caddr_t)ip6 + len);
10977 shout = mtod(mout, struct sctphdr *);
10980 #if defined(INET) || defined(INET6)
10982 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
10983 sctp_m_freem(mout);
10986 udp = (struct udphdr *)shout;
10987 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
10988 udp->uh_dport = port;
10990 udp->uh_ulen = htons(sizeof(struct udphdr) +
10991 sizeof(struct sctphdr) +
10992 sizeof(struct sctp_chunkhdr) +
10993 cause_len + padding_len);
10994 len += sizeof(struct udphdr);
10995 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
11000 shout->src_port = sh->dest_port;
11001 shout->dest_port = sh->src_port;
11002 shout->checksum = 0;
11004 shout->v_tag = htonl(vtag);
11006 shout->v_tag = sh->v_tag;
11008 len += sizeof(struct sctphdr);
11009 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
11010 ch->chunk_type = type;
11012 ch->chunk_flags = 0;
11014 ch->chunk_flags = SCTP_HAD_NO_TCB;
11016 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
11017 len += sizeof(struct sctp_chunkhdr);
11018 len += cause_len + padding_len;
11020 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
11021 sctp_m_freem(mout);
11024 SCTP_ATTACH_CHAIN(o_pak, mout, len);
11025 switch (dst->sa_family) {
11030 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
11035 ip->ip_len = htons(len);
11037 #if defined(SCTP_WITH_NO_CSUM)
11038 SCTP_STAT_INCR(sctps_sendnocrc);
11040 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
11041 SCTP_STAT_INCR(sctps_sendswcrc);
11044 SCTP_ENABLE_UDP_CSUM(o_pak);
11047 #if defined(SCTP_WITH_NO_CSUM)
11048 SCTP_STAT_INCR(sctps_sendnocrc);
11050 mout->m_pkthdr.csum_flags = CSUM_SCTP;
11051 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11052 SCTP_STAT_INCR(sctps_sendhwcrc);
11055 #ifdef SCTP_PACKET_LOGGING
11056 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11057 sctp_packet_log(o_pak);
11060 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
11065 ip6->ip6_plen = len - sizeof(struct ip6_hdr);
11067 #if defined(SCTP_WITH_NO_CSUM)
11068 SCTP_STAT_INCR(sctps_sendnocrc);
11070 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
11071 SCTP_STAT_INCR(sctps_sendswcrc);
11073 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
11074 udp->uh_sum = 0xffff;
11077 #if defined(SCTP_WITH_NO_CSUM)
11078 SCTP_STAT_INCR(sctps_sendnocrc);
11080 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
11081 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
11082 SCTP_STAT_INCR(sctps_sendhwcrc);
11085 #ifdef SCTP_PACKET_LOGGING
11086 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
11087 sctp_packet_log(o_pak);
11090 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
11094 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
11096 sctp_m_freem(mout);
11097 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
11100 SCTP_STAT_INCR(sctps_sendpackets);
11101 SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
11102 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
11107 sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
11108 struct sctphdr *sh,
11109 uint8_t mflowtype, uint32_t mflowid,
11110 uint32_t vrf_id, uint16_t port)
11112 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
11113 mflowtype, mflowid,
11118 sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
11119 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
11124 struct sctp_tmit_chunk *chk;
11125 struct sctp_heartbeat_chunk *hb;
11126 struct timeval now;
11128 SCTP_TCB_LOCK_ASSERT(stcb);
11132 (void)SCTP_GETTIME_TIMEVAL(&now);
11133 switch (net->ro._l_addr.sa.sa_family) {
11145 sctp_alloc_a_chunk(stcb, chk);
11147 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
11150 chk->copy_by_ref = 0;
11151 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
11152 chk->rec.chunk_id.can_take_data = 1;
11154 chk->asoc = &stcb->asoc;
11155 chk->send_size = sizeof(struct sctp_heartbeat_chunk);
11157 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11158 if (chk->data == NULL) {
11159 sctp_free_a_chunk(stcb, chk, so_locked);
11162 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11163 SCTP_BUF_LEN(chk->data) = chk->send_size;
11164 chk->sent = SCTP_DATAGRAM_UNSENT;
11165 chk->snd_count = 0;
11167 atomic_add_int(&chk->whoTo->ref_count, 1);
11168 /* Now we have a mbuf that we can fill in with the details */
11169 hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
11170 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
11171 /* fill out chunk header */
11172 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
11173 hb->ch.chunk_flags = 0;
11174 hb->ch.chunk_length = htons(chk->send_size);
11175 /* Fill out hb parameter */
11176 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
11177 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
11178 hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
11179 hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
11180 /* Did our user request this one, put it in */
11181 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
11182 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
11183 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
11185 * we only take from the entropy pool if the address is not
11188 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11189 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
11191 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
11192 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
11194 switch (net->ro._l_addr.sa.sa_family) {
11197 memcpy(hb->heartbeat.hb_info.address,
11198 &net->ro._l_addr.sin.sin_addr,
11199 sizeof(net->ro._l_addr.sin.sin_addr));
11204 memcpy(hb->heartbeat.hb_info.address,
11205 &net->ro._l_addr.sin6.sin6_addr,
11206 sizeof(net->ro._l_addr.sin6.sin6_addr));
11213 net->hb_responded = 0;
11214 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11215 stcb->asoc.ctrl_queue_cnt++;
11216 SCTP_STAT_INCR(sctps_sendheartbeat);
11221 sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
11224 struct sctp_association *asoc;
11225 struct sctp_ecne_chunk *ecne;
11226 struct sctp_tmit_chunk *chk;
11231 asoc = &stcb->asoc;
11232 SCTP_TCB_LOCK_ASSERT(stcb);
11233 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11234 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
11235 /* found a previous ECN_ECHO update it if needed */
11236 uint32_t cnt, ctsn;
11238 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11239 ctsn = ntohl(ecne->tsn);
11240 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11241 ecne->tsn = htonl(high_tsn);
11242 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11244 cnt = ntohl(ecne->num_pkts_since_cwr);
11246 ecne->num_pkts_since_cwr = htonl(cnt);
11250 /* nope could not find one to update so we must build one */
11251 sctp_alloc_a_chunk(stcb, chk);
11255 SCTP_STAT_INCR(sctps_queue_upd_ecne);
11256 chk->copy_by_ref = 0;
11257 chk->rec.chunk_id.id = SCTP_ECN_ECHO;
11258 chk->rec.chunk_id.can_take_data = 0;
11260 chk->asoc = &stcb->asoc;
11261 chk->send_size = sizeof(struct sctp_ecne_chunk);
11262 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11263 if (chk->data == NULL) {
11264 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11267 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11268 SCTP_BUF_LEN(chk->data) = chk->send_size;
11269 chk->sent = SCTP_DATAGRAM_UNSENT;
11270 chk->snd_count = 0;
11272 atomic_add_int(&chk->whoTo->ref_count, 1);
11274 stcb->asoc.ecn_echo_cnt_onq++;
11275 ecne = mtod(chk->data, struct sctp_ecne_chunk *);
11276 ecne->ch.chunk_type = SCTP_ECN_ECHO;
11277 ecne->ch.chunk_flags = 0;
11278 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
11279 ecne->tsn = htonl(high_tsn);
11280 ecne->num_pkts_since_cwr = htonl(1);
11281 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
11282 asoc->ctrl_queue_cnt++;
11286 sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
11287 struct mbuf *m, int len, int iphlen, int bad_crc)
11289 struct sctp_association *asoc;
11290 struct sctp_pktdrop_chunk *drp;
11291 struct sctp_tmit_chunk *chk;
11297 struct sctp_chunkhdr *ch, chunk_buf;
11298 unsigned int chk_length;
11303 asoc = &stcb->asoc;
11304 SCTP_TCB_LOCK_ASSERT(stcb);
11305 if (asoc->pktdrop_supported == 0) {
11307 * peer must declare support before I send one.
11311 if (stcb->sctp_socket == NULL) {
11314 sctp_alloc_a_chunk(stcb, chk);
11318 chk->copy_by_ref = 0;
11319 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
11320 chk->rec.chunk_id.can_take_data = 1;
11323 chk->send_size = len;
11324 /* Validate that we do not have an ABORT in here. */
11325 offset = iphlen + sizeof(struct sctphdr);
11326 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11327 sizeof(*ch), (uint8_t *) & chunk_buf);
11328 while (ch != NULL) {
11329 chk_length = ntohs(ch->chunk_length);
11330 if (chk_length < sizeof(*ch)) {
11331 /* break to abort land */
11334 switch (ch->chunk_type) {
11335 case SCTP_PACKET_DROPPED:
11336 case SCTP_ABORT_ASSOCIATION:
11337 case SCTP_INITIATION_ACK:
11339 * We don't respond with an PKT-DROP to an ABORT
11340 * or PKT-DROP. We also do not respond to an
11341 * INIT-ACK, because we can't know if the initiation
11342 * tag is correct or not.
11344 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11349 offset += SCTP_SIZE32(chk_length);
11350 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
11351 sizeof(*ch), (uint8_t *) & chunk_buf);
11354 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
11355 min(stcb->asoc.smallest_mtu, MCLBYTES)) {
11357 * only send 1 mtu worth, trim off the excess on the end.
11360 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
11363 chk->asoc = &stcb->asoc;
11364 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11365 if (chk->data == NULL) {
11367 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11370 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11371 drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
11373 sctp_m_freem(chk->data);
11377 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
11378 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
11379 chk->book_size_scale = 0;
11381 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
11382 drp->trunc_len = htons(fullsz);
11384 * Len is already adjusted to size minus overhead above take
11385 * out the pkt_drop chunk itself from it.
11387 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
11388 len = chk->send_size;
11390 /* no truncation needed */
11391 drp->ch.chunk_flags = 0;
11392 drp->trunc_len = htons(0);
11395 drp->ch.chunk_flags |= SCTP_BADCRC;
11397 chk->send_size += sizeof(struct sctp_pktdrop_chunk);
11398 SCTP_BUF_LEN(chk->data) = chk->send_size;
11399 chk->sent = SCTP_DATAGRAM_UNSENT;
11400 chk->snd_count = 0;
11402 /* we should hit here */
11404 atomic_add_int(&chk->whoTo->ref_count, 1);
11408 drp->ch.chunk_type = SCTP_PACKET_DROPPED;
11409 drp->ch.chunk_length = htons(chk->send_size);
11410 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
11414 drp->bottle_bw = htonl(spc);
11415 if (asoc->my_rwnd) {
11416 drp->current_onq = htonl(asoc->size_on_reasm_queue +
11417 asoc->size_on_all_streams +
11418 asoc->my_rwnd_control_len +
11419 stcb->sctp_socket->so_rcv.sb_cc);
11422 * If my rwnd is 0, possibly from mbuf depletion as well as
11423 * space used, tell the peer there is NO space aka onq == bw
11425 drp->current_onq = htonl(spc);
11429 m_copydata(m, iphlen, len, (caddr_t)datap);
11430 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11431 asoc->ctrl_queue_cnt++;
11435 sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
11437 struct sctp_association *asoc;
11438 struct sctp_cwr_chunk *cwr;
11439 struct sctp_tmit_chunk *chk;
11441 SCTP_TCB_LOCK_ASSERT(stcb);
11445 asoc = &stcb->asoc;
11446 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
11447 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
11449 * found a previous CWR queued to same destination
11450 * update it if needed
11454 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11455 ctsn = ntohl(cwr->tsn);
11456 if (SCTP_TSN_GT(high_tsn, ctsn)) {
11457 cwr->tsn = htonl(high_tsn);
11459 if (override & SCTP_CWR_REDUCE_OVERRIDE) {
11460 /* Make sure override is carried */
11461 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
11466 sctp_alloc_a_chunk(stcb, chk);
11470 chk->copy_by_ref = 0;
11471 chk->rec.chunk_id.id = SCTP_ECN_CWR;
11472 chk->rec.chunk_id.can_take_data = 1;
11474 chk->asoc = &stcb->asoc;
11475 chk->send_size = sizeof(struct sctp_cwr_chunk);
11476 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
11477 if (chk->data == NULL) {
11478 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
11481 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11482 SCTP_BUF_LEN(chk->data) = chk->send_size;
11483 chk->sent = SCTP_DATAGRAM_UNSENT;
11484 chk->snd_count = 0;
11486 atomic_add_int(&chk->whoTo->ref_count, 1);
11487 cwr = mtod(chk->data, struct sctp_cwr_chunk *);
11488 cwr->ch.chunk_type = SCTP_ECN_CWR;
11489 cwr->ch.chunk_flags = override;
11490 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
11491 cwr->tsn = htonl(high_tsn);
11492 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
11493 asoc->ctrl_queue_cnt++;
11497 sctp_add_stream_reset_out(struct sctp_tmit_chunk *chk,
11498 int number_entries, uint16_t * list,
11499 uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
11501 uint16_t len, old_len, i;
11502 struct sctp_stream_reset_out_request *req_out;
11503 struct sctp_chunkhdr *ch;
11505 ch = mtod(chk->data, struct sctp_chunkhdr *);
11506 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11508 /* get to new offset for the param. */
11509 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
11510 /* now how long will this param be? */
11511 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
11512 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
11513 req_out->ph.param_length = htons(len);
11514 req_out->request_seq = htonl(seq);
11515 req_out->response_seq = htonl(resp_seq);
11516 req_out->send_reset_at_tsn = htonl(last_sent);
11517 if (number_entries) {
11518 for (i = 0; i < number_entries; i++) {
11519 req_out->list_of_streams[i] = htons(list[i]);
11522 if (SCTP_SIZE32(len) > len) {
11524 * Need to worry about the pad we may end up adding to the
11525 * end. This is easy since the struct is either aligned to 4
11526 * bytes or 2 bytes off.
11528 req_out->list_of_streams[number_entries] = 0;
11530 /* now fix the chunk length */
11531 ch->chunk_length = htons(len + old_len);
11532 chk->book_size = len + old_len;
11533 chk->book_size_scale = 0;
11534 chk->send_size = SCTP_SIZE32(chk->book_size);
11535 SCTP_BUF_LEN(chk->data) = chk->send_size;
11540 sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
11541 int number_entries, uint16_t * list,
11544 uint16_t len, old_len, i;
11545 struct sctp_stream_reset_in_request *req_in;
11546 struct sctp_chunkhdr *ch;
11548 ch = mtod(chk->data, struct sctp_chunkhdr *);
11549 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11551 /* get to new offset for the param. */
11552 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
11553 /* now how long will this param be? */
11554 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
11555 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
11556 req_in->ph.param_length = htons(len);
11557 req_in->request_seq = htonl(seq);
11558 if (number_entries) {
11559 for (i = 0; i < number_entries; i++) {
11560 req_in->list_of_streams[i] = htons(list[i]);
11563 if (SCTP_SIZE32(len) > len) {
11565 * Need to worry about the pad we may end up adding to the
11566 * end. This is easy since the struct is either aligned to 4
11567 * bytes or 2 bytes off.
11569 req_in->list_of_streams[number_entries] = 0;
11571 /* now fix the chunk length */
11572 ch->chunk_length = htons(len + old_len);
11573 chk->book_size = len + old_len;
11574 chk->book_size_scale = 0;
11575 chk->send_size = SCTP_SIZE32(chk->book_size);
11576 SCTP_BUF_LEN(chk->data) = chk->send_size;
11581 sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
11584 uint16_t len, old_len;
11585 struct sctp_stream_reset_tsn_request *req_tsn;
11586 struct sctp_chunkhdr *ch;
11588 ch = mtod(chk->data, struct sctp_chunkhdr *);
11589 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11591 /* get to new offset for the param. */
11592 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
11593 /* now how long will this param be? */
11594 len = sizeof(struct sctp_stream_reset_tsn_request);
11595 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
11596 req_tsn->ph.param_length = htons(len);
11597 req_tsn->request_seq = htonl(seq);
11599 /* now fix the chunk length */
11600 ch->chunk_length = htons(len + old_len);
11601 chk->send_size = len + old_len;
11602 chk->book_size = SCTP_SIZE32(chk->send_size);
11603 chk->book_size_scale = 0;
11604 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11609 sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
11610 uint32_t resp_seq, uint32_t result)
11612 uint16_t len, old_len;
11613 struct sctp_stream_reset_response *resp;
11614 struct sctp_chunkhdr *ch;
11616 ch = mtod(chk->data, struct sctp_chunkhdr *);
11617 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11619 /* get to new offset for the param. */
11620 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
11621 /* now how long will this param be? */
11622 len = sizeof(struct sctp_stream_reset_response);
11623 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11624 resp->ph.param_length = htons(len);
11625 resp->response_seq = htonl(resp_seq);
11626 resp->result = ntohl(result);
11628 /* now fix the chunk length */
11629 ch->chunk_length = htons(len + old_len);
11630 chk->book_size = len + old_len;
11631 chk->book_size_scale = 0;
11632 chk->send_size = SCTP_SIZE32(chk->book_size);
11633 SCTP_BUF_LEN(chk->data) = chk->send_size;
11638 sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
11639 uint32_t resp_seq, uint32_t result,
11640 uint32_t send_una, uint32_t recv_next)
11642 uint16_t len, old_len;
11643 struct sctp_stream_reset_response_tsn *resp;
11644 struct sctp_chunkhdr *ch;
11646 ch = mtod(chk->data, struct sctp_chunkhdr *);
11647 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11649 /* get to new offset for the param. */
11650 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
11651 /* now how long will this param be? */
11652 len = sizeof(struct sctp_stream_reset_response_tsn);
11653 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
11654 resp->ph.param_length = htons(len);
11655 resp->response_seq = htonl(resp_seq);
11656 resp->result = htonl(result);
11657 resp->senders_next_tsn = htonl(send_una);
11658 resp->receivers_next_tsn = htonl(recv_next);
11660 /* now fix the chunk length */
11661 ch->chunk_length = htons(len + old_len);
11662 chk->book_size = len + old_len;
11663 chk->send_size = SCTP_SIZE32(chk->book_size);
11664 chk->book_size_scale = 0;
11665 SCTP_BUF_LEN(chk->data) = chk->send_size;
11670 sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
11674 uint16_t len, old_len;
11675 struct sctp_chunkhdr *ch;
11676 struct sctp_stream_reset_add_strm *addstr;
11678 ch = mtod(chk->data, struct sctp_chunkhdr *);
11679 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
11681 /* get to new offset for the param. */
11682 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
11683 /* now how long will this param be? */
11684 len = sizeof(struct sctp_stream_reset_add_strm);
11687 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
11688 addstr->ph.param_length = htons(len);
11689 addstr->request_seq = htonl(seq);
11690 addstr->number_of_streams = htons(adding);
11691 addstr->reserved = 0;
11693 /* now fix the chunk length */
11694 ch->chunk_length = htons(len + old_len);
11695 chk->send_size = len + old_len;
11696 chk->book_size = SCTP_SIZE32(chk->send_size);
11697 chk->book_size_scale = 0;
11698 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11703 sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
11707 uint16_t len, old_len;
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);
11719 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
11720 addstr->ph.param_length = htons(len);
11721 addstr->request_seq = htonl(seq);
11722 addstr->number_of_streams = htons(adding);
11723 addstr->reserved = 0;
11725 /* now fix the chunk length */
11726 ch->chunk_length = htons(len + old_len);
11727 chk->send_size = len + old_len;
11728 chk->book_size = SCTP_SIZE32(chk->send_size);
11729 chk->book_size_scale = 0;
11730 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
11735 sctp_send_str_reset_req(struct sctp_tcb *stcb,
11736 uint16_t number_entries, uint16_t * list,
11737 uint8_t send_out_req,
11738 uint8_t send_in_req,
11739 uint8_t send_tsn_req,
11740 uint8_t add_stream,
11742 uint16_t adding_i, uint8_t peer_asked)
11745 struct sctp_association *asoc;
11746 struct sctp_tmit_chunk *chk;
11747 struct sctp_chunkhdr *ch;
11750 asoc = &stcb->asoc;
11751 if (asoc->stream_reset_outstanding) {
11753 * Already one pending, must get ACK back to clear the flag.
11755 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
11758 if ((send_out_req == 0) && (send_in_req == 0) && (send_tsn_req == 0) &&
11759 (add_stream == 0)) {
11760 /* nothing to do */
11761 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11764 if (send_tsn_req && (send_out_req || send_in_req)) {
11765 /* error, can't do that */
11766 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
11769 if (number_entries > (MCLBYTES -
11770 SCTP_MIN_OVERHEAD -
11771 sizeof(struct sctp_chunkhdr) -
11772 sizeof(struct sctp_stream_reset_out_request)) /
11773 sizeof(uint16_t)) {
11774 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11777 sctp_alloc_a_chunk(stcb, chk);
11779 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11782 chk->copy_by_ref = 0;
11783 chk->rec.chunk_id.id = SCTP_STREAM_RESET;
11784 chk->rec.chunk_id.can_take_data = 0;
11786 chk->asoc = &stcb->asoc;
11787 chk->book_size = sizeof(struct sctp_chunkhdr);
11788 chk->send_size = SCTP_SIZE32(chk->book_size);
11789 chk->book_size_scale = 0;
11791 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
11792 if (chk->data == NULL) {
11793 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
11794 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
11797 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
11799 /* setup chunk parameters */
11800 chk->sent = SCTP_DATAGRAM_UNSENT;
11801 chk->snd_count = 0;
11802 if (stcb->asoc.alternate) {
11803 chk->whoTo = stcb->asoc.alternate;
11805 chk->whoTo = stcb->asoc.primary_destination;
11807 atomic_add_int(&chk->whoTo->ref_count, 1);
11808 ch = mtod(chk->data, struct sctp_chunkhdr *);
11809 ch->chunk_type = SCTP_STREAM_RESET;
11810 ch->chunk_flags = 0;
11811 ch->chunk_length = htons(chk->book_size);
11812 SCTP_BUF_LEN(chk->data) = chk->send_size;
11814 seq = stcb->asoc.str_reset_seq_out;
11815 if (send_out_req) {
11816 sctp_add_stream_reset_out(chk, number_entries, list,
11817 seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
11818 asoc->stream_reset_out_is_outstanding = 1;
11820 asoc->stream_reset_outstanding++;
11822 if ((add_stream & 1) &&
11823 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
11824 /* Need to allocate more */
11825 struct sctp_stream_out *oldstream;
11826 struct sctp_stream_queue_pending *sp, *nsp;
11829 #if defined(SCTP_DETAILED_STR_STATS)
11834 oldstream = stcb->asoc.strmout;
11835 /* get some more */
11836 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
11837 ((stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out)),
11839 if (stcb->asoc.strmout == NULL) {
11842 stcb->asoc.strmout = oldstream;
11843 /* Turn off the bit */
11844 x = add_stream & 0xfe;
11849 * Ok now we proceed with copying the old out stuff and
11850 * initializing the new stuff.
11852 SCTP_TCB_SEND_LOCK(stcb);
11853 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
11854 for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
11855 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11856 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
11857 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
11858 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
11859 stcb->asoc.strmout[i].stream_no = i;
11860 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
11861 /* now anything on those queues? */
11862 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
11863 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
11864 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
11866 /* Now move assoc pointers too */
11867 if (stcb->asoc.last_out_stream == &oldstream[i]) {
11868 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
11870 if (stcb->asoc.locked_on_sending == &oldstream[i]) {
11871 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
11874 /* now the new streams */
11875 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
11876 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
11877 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
11878 stcb->asoc.strmout[i].chunks_on_queues = 0;
11879 #if defined(SCTP_DETAILED_STR_STATS)
11880 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
11881 stcb->asoc.strmout[i].abandoned_sent[j] = 0;
11882 stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
11885 stcb->asoc.strmout[i].abandoned_sent[0] = 0;
11886 stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
11888 stcb->asoc.strmout[i].next_sequence_send = 0x0;
11889 stcb->asoc.strmout[i].stream_no = i;
11890 stcb->asoc.strmout[i].last_msg_incomplete = 0;
11891 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
11893 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
11894 SCTP_FREE(oldstream, SCTP_M_STRMO);
11895 SCTP_TCB_SEND_UNLOCK(stcb);
11898 if ((add_stream & 1) && (adding_o > 0)) {
11899 asoc->strm_pending_add_size = adding_o;
11900 asoc->peer_req_out = peer_asked;
11901 sctp_add_an_out_stream(chk, seq, adding_o);
11903 asoc->stream_reset_outstanding++;
11905 if ((add_stream & 2) && (adding_i > 0)) {
11906 sctp_add_an_in_stream(chk, seq, adding_i);
11908 asoc->stream_reset_outstanding++;
11911 sctp_add_stream_reset_in(chk, number_entries, list, seq);
11913 asoc->stream_reset_outstanding++;
11915 if (send_tsn_req) {
11916 sctp_add_stream_reset_tsn(chk, seq);
11917 asoc->stream_reset_outstanding++;
11919 asoc->str_reset = chk;
11920 /* insert the chunk for sending */
11921 TAILQ_INSERT_TAIL(&asoc->control_send_queue,
11924 asoc->ctrl_queue_cnt++;
11925 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
11930 sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
11931 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11932 uint8_t mflowtype, uint32_t mflowid,
11933 uint32_t vrf_id, uint16_t port)
11935 /* Don't respond to an ABORT with an ABORT. */
11936 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
11938 sctp_m_freem(cause);
11941 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
11942 mflowtype, mflowid,
11948 sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
11949 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
11950 uint8_t mflowtype, uint32_t mflowid,
11951 uint32_t vrf_id, uint16_t port)
11953 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
11954 mflowtype, mflowid,
11959 static struct mbuf *
11960 sctp_copy_resume(struct uio *uio,
11962 int user_marks_eor,
11965 struct mbuf **new_tail)
11969 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
11970 (M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
11972 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
11975 *sndout = m_length(m, NULL);
11976 *new_tail = m_last(m);
11982 sctp_copy_one(struct sctp_stream_queue_pending *sp,
11986 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
11988 if (sp->data == NULL) {
11989 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
11992 sp->tail_mbuf = m_last(sp->data);
11998 static struct sctp_stream_queue_pending *
11999 sctp_copy_it_in(struct sctp_tcb *stcb,
12000 struct sctp_association *asoc,
12001 struct sctp_sndrcvinfo *srcv,
12003 struct sctp_nets *net,
12005 int user_marks_eor,
12009 * This routine must be very careful in its work. Protocol
12010 * processing is up and running so care must be taken to spl...()
12011 * when you need to do something that may effect the stcb/asoc. The
12012 * sb is locked however. When data is copied the protocol processing
12013 * should be enabled since this is a slower operation...
12015 struct sctp_stream_queue_pending *sp = NULL;
12019 /* Now can we send this? */
12020 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12021 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12022 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12023 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12024 /* got data while shutting down */
12025 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12026 *error = ECONNRESET;
12029 sctp_alloc_a_strmoq(stcb, sp);
12031 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12036 sp->sender_all_done = 0;
12037 sp->sinfo_flags = srcv->sinfo_flags;
12038 sp->timetolive = srcv->sinfo_timetolive;
12039 sp->ppid = srcv->sinfo_ppid;
12040 sp->context = srcv->sinfo_context;
12041 (void)SCTP_GETTIME_TIMEVAL(&sp->ts);
12043 sp->stream = srcv->sinfo_stream;
12044 sp->length = min(uio->uio_resid, max_send_len);
12045 if ((sp->length == (uint32_t) uio->uio_resid) &&
12046 ((user_marks_eor == 0) ||
12047 (srcv->sinfo_flags & SCTP_EOF) ||
12048 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12049 sp->msg_is_complete = 1;
12051 sp->msg_is_complete = 0;
12053 sp->sender_all_done = 0;
12054 sp->some_taken = 0;
12055 sp->put_last_out = 0;
12056 resv_in_first = sizeof(struct sctp_data_chunk);
12057 sp->data = sp->tail_mbuf = NULL;
12058 if (sp->length == 0) {
12062 if (srcv->sinfo_keynumber_valid) {
12063 sp->auth_keyid = srcv->sinfo_keynumber;
12065 sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
12067 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
12068 sctp_auth_key_acquire(stcb, sp->auth_keyid);
12069 sp->holds_key_ref = 1;
12071 *error = sctp_copy_one(sp, uio, resv_in_first);
12074 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
12077 if (sp->sinfo_flags & SCTP_ADDR_OVER) {
12079 atomic_add_int(&sp->net->ref_count, 1);
12083 sctp_set_prsctp_policy(sp);
12091 sctp_sosend(struct socket *so,
12092 struct sockaddr *addr,
12095 struct mbuf *control,
12100 int error, use_sndinfo = 0;
12101 struct sctp_sndrcvinfo sndrcvninfo;
12102 struct sockaddr *addr_to_use;
12104 #if defined(INET) && defined(INET6)
12105 struct sockaddr_in sin;
12110 /* process cmsg snd/rcv info (maybe a assoc-id) */
12111 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
12112 sizeof(sndrcvninfo))) {
12117 addr_to_use = addr;
12118 #if defined(INET) && defined(INET6)
12119 if ((addr) && (addr->sa_family == AF_INET6)) {
12120 struct sockaddr_in6 *sin6;
12122 sin6 = (struct sockaddr_in6 *)addr;
12123 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
12124 in6_sin6_2_sin(&sin, sin6);
12125 addr_to_use = (struct sockaddr *)&sin;
12129 error = sctp_lower_sosend(so, addr_to_use, uio, top,
12132 use_sndinfo ? &sndrcvninfo : NULL
12140 sctp_lower_sosend(struct socket *so,
12141 struct sockaddr *addr,
12143 struct mbuf *i_pak,
12144 struct mbuf *control,
12146 struct sctp_sndrcvinfo *srcv
12151 unsigned int sndlen = 0, max_len;
12153 struct mbuf *top = NULL;
12154 int queue_only = 0, queue_only_for_init = 0;
12155 int free_cnt_applied = 0;
12157 int now_filled = 0;
12158 unsigned int inqueue_bytes = 0;
12159 struct sctp_block_entry be;
12160 struct sctp_inpcb *inp;
12161 struct sctp_tcb *stcb = NULL;
12162 struct timeval now;
12163 struct sctp_nets *net;
12164 struct sctp_association *asoc;
12165 struct sctp_inpcb *t_inp;
12166 int user_marks_eor;
12167 int create_lock_applied = 0;
12168 int nagle_applies = 0;
12169 int some_on_control = 0;
12170 int got_all_of_the_send = 0;
12171 int hold_tcblock = 0;
12172 int non_blocking = 0;
12173 uint32_t local_add_more, local_soresv = 0;
12175 uint16_t sinfo_flags;
12176 sctp_assoc_t sinfo_assoc_id;
12183 t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
12185 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12188 SCTP_RELEASE_PKT(i_pak);
12192 if ((uio == NULL) && (i_pak == NULL)) {
12193 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12196 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
12197 atomic_add_int(&inp->total_sends, 1);
12199 if (uio->uio_resid < 0) {
12200 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12203 sndlen = uio->uio_resid;
12205 top = SCTP_HEADER_TO_CHAIN(i_pak);
12206 sndlen = SCTP_HEADER_LEN(i_pak);
12208 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
12211 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
12212 (inp->sctp_socket->so_qlimit)) {
12213 /* The listener can NOT send */
12214 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12219 * Pre-screen address, if one is given the sin-len
12220 * must be set correctly!
12223 union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
12225 switch (raddr->sa.sa_family) {
12228 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
12229 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12233 port = raddr->sin.sin_port;
12238 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
12239 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12243 port = raddr->sin6.sin6_port;
12247 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
12248 error = EAFNOSUPPORT;
12255 sinfo_flags = srcv->sinfo_flags;
12256 sinfo_assoc_id = srcv->sinfo_assoc_id;
12257 if (INVALID_SINFO_FLAG(sinfo_flags) ||
12258 PR_SCTP_INVALID_POLICY(sinfo_flags)) {
12259 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12263 if (srcv->sinfo_flags)
12264 SCTP_STAT_INCR(sctps_sends_with_flags);
12266 sinfo_flags = inp->def_send.sinfo_flags;
12267 sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
12269 if (sinfo_flags & SCTP_SENDALL) {
12270 /* its a sendall */
12271 error = sctp_sendall(inp, uio, top, srcv);
12275 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
12276 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12280 /* now we must find the assoc */
12281 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
12282 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
12283 SCTP_INP_RLOCK(inp);
12284 stcb = LIST_FIRST(&inp->sctp_asoc_list);
12286 SCTP_TCB_LOCK(stcb);
12289 SCTP_INP_RUNLOCK(inp);
12290 } else if (sinfo_assoc_id) {
12291 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
12294 * Since we did not use findep we must
12295 * increment it, and if we don't find a tcb
12298 SCTP_INP_WLOCK(inp);
12299 SCTP_INP_INCR_REF(inp);
12300 SCTP_INP_WUNLOCK(inp);
12301 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12302 if (stcb == NULL) {
12303 SCTP_INP_WLOCK(inp);
12304 SCTP_INP_DECR_REF(inp);
12305 SCTP_INP_WUNLOCK(inp);
12310 if ((stcb == NULL) && (addr)) {
12311 /* Possible implicit send? */
12312 SCTP_ASOC_CREATE_LOCK(inp);
12313 create_lock_applied = 1;
12314 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
12315 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
12316 /* Should I really unlock ? */
12317 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12322 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
12323 (addr->sa_family == AF_INET6)) {
12324 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12328 SCTP_INP_WLOCK(inp);
12329 SCTP_INP_INCR_REF(inp);
12330 SCTP_INP_WUNLOCK(inp);
12331 /* With the lock applied look again */
12332 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
12333 if ((stcb == NULL) && (control != NULL) && (port > 0)) {
12334 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
12336 if (stcb == NULL) {
12337 SCTP_INP_WLOCK(inp);
12338 SCTP_INP_DECR_REF(inp);
12339 SCTP_INP_WUNLOCK(inp);
12346 if (t_inp != inp) {
12347 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
12352 if (stcb == NULL) {
12353 if (addr == NULL) {
12354 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12358 /* We must go ahead and start the INIT process */
12361 if ((sinfo_flags & SCTP_ABORT) ||
12362 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
12364 * User asks to abort a non-existant assoc,
12365 * or EOF a non-existant assoc with no data
12367 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
12371 /* get an asoc/stcb struct */
12372 vrf_id = inp->def_vrf_id;
12374 if (create_lock_applied == 0) {
12375 panic("Error, should hold create lock and I don't?");
12378 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
12381 if (stcb == NULL) {
12382 /* Error is setup for us in the call */
12385 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
12386 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
12388 * Set the connected flag so we can queue
12391 soisconnecting(so);
12394 if (create_lock_applied) {
12395 SCTP_ASOC_CREATE_UNLOCK(inp);
12396 create_lock_applied = 0;
12398 SCTP_PRINTF("Huh-3? create lock should have been on??\n");
12401 * Turn on queue only flag to prevent data from
12405 asoc = &stcb->asoc;
12406 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12407 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
12409 /* initialize authentication params for the assoc */
12410 sctp_initialize_auth_params(inp, stcb);
12413 if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
12414 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
12415 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
12421 /* out with the INIT */
12422 queue_only_for_init = 1;
12424 * we may want to dig in after this call and adjust the MTU
12425 * value. It defaulted to 1500 (constant) but the ro
12426 * structure may now have an update and thus we may need to
12427 * change it BEFORE we append the message.
12431 asoc = &stcb->asoc;
12433 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
12434 if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
12436 net = sctp_findnet(stcb, addr);
12439 if ((net == NULL) ||
12440 ((port != 0) && (port != stcb->rport))) {
12441 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12446 if (stcb->asoc.alternate) {
12447 net = stcb->asoc.alternate;
12449 net = stcb->asoc.primary_destination;
12452 atomic_add_int(&stcb->total_sends, 1);
12453 /* Keep the stcb from being freed under our feet */
12454 atomic_add_int(&asoc->refcnt, 1);
12455 free_cnt_applied = 1;
12457 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
12458 if (sndlen > asoc->smallest_mtu) {
12459 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12464 if (SCTP_SO_IS_NBIO(so)
12465 || (flags & MSG_NBIO)
12469 /* would we block? */
12470 if (non_blocking) {
12471 if (hold_tcblock == 0) {
12472 SCTP_TCB_LOCK(stcb);
12475 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12476 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
12477 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12478 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
12479 if (sndlen > SCTP_SB_LIMIT_SND(so))
12482 error = EWOULDBLOCK;
12485 stcb->asoc.sb_send_resv += sndlen;
12486 SCTP_TCB_UNLOCK(stcb);
12489 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
12491 local_soresv = sndlen;
12492 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12493 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12494 error = ECONNRESET;
12497 if (create_lock_applied) {
12498 SCTP_ASOC_CREATE_UNLOCK(inp);
12499 create_lock_applied = 0;
12501 if (asoc->stream_reset_outstanding) {
12503 * Can't queue any data while stream reset is underway.
12505 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAGAIN);
12509 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12510 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12513 /* we are now done with all control */
12515 sctp_m_freem(control);
12518 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
12519 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
12520 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
12521 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
12522 if (srcv->sinfo_flags & SCTP_ABORT) {
12525 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12526 error = ECONNRESET;
12530 /* Ok, we will attempt a msgsnd :> */
12532 p->td_ru.ru_msgsnd++;
12534 /* Are we aborting? */
12535 if (srcv->sinfo_flags & SCTP_ABORT) {
12537 int tot_demand, tot_out = 0, max_out;
12539 SCTP_STAT_INCR(sctps_sends_with_abort);
12540 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
12541 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
12542 /* It has to be up before we abort */
12543 /* how big is the user initiated abort? */
12544 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12548 if (hold_tcblock) {
12549 SCTP_TCB_UNLOCK(stcb);
12553 struct mbuf *cntm = NULL;
12555 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
12557 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
12558 tot_out += SCTP_BUF_LEN(cntm);
12562 /* Must fit in a MTU */
12564 tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
12565 if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
12567 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12571 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
12574 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
12578 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
12579 max_out -= sizeof(struct sctp_abort_msg);
12580 if (tot_out > max_out) {
12584 struct sctp_paramhdr *ph;
12586 /* now move forward the data pointer */
12587 ph = mtod(mm, struct sctp_paramhdr *);
12588 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
12589 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
12591 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
12593 error = uiomove((caddr_t)ph, (int)tot_out, uio);
12596 * Here if we can't get his data we
12597 * still abort we just don't get to
12598 * send the users note :-0
12605 SCTP_BUF_NEXT(mm) = top;
12609 if (hold_tcblock == 0) {
12610 SCTP_TCB_LOCK(stcb);
12612 atomic_add_int(&stcb->asoc.refcnt, -1);
12613 free_cnt_applied = 0;
12614 /* release this lock, otherwise we hang on ourselves */
12615 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
12616 /* now relock the stcb so everything is sane */
12620 * In this case top is already chained to mm avoid double
12621 * free, since we free it below if top != NULL and driver
12622 * would free it after sending the packet out
12629 /* Calculate the maximum we can send */
12630 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12631 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12632 if (non_blocking) {
12633 /* we already checked for non-blocking above. */
12636 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12641 if (hold_tcblock) {
12642 SCTP_TCB_UNLOCK(stcb);
12645 /* Is the stream no. valid? */
12646 if (srcv->sinfo_stream >= asoc->streamoutcnt) {
12647 /* Invalid stream number */
12648 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12652 if (asoc->strmout == NULL) {
12653 /* huh? software error */
12654 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
12658 /* Unless E_EOR mode is on, we must make a send FIT in one call. */
12659 if ((user_marks_eor == 0) &&
12660 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
12661 /* It will NEVER fit */
12662 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
12666 if ((uio == NULL) && user_marks_eor) {
12668 * We do not support eeor mode for
12669 * sending with mbuf chains (like sendfile).
12671 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12675 if (user_marks_eor) {
12676 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
12679 * For non-eeor the whole message must fit in
12680 * the socket send buffer.
12682 local_add_more = sndlen;
12685 if (non_blocking) {
12686 goto skip_preblock;
12688 if (((max_len <= local_add_more) &&
12689 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
12691 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12692 /* No room right now ! */
12693 SOCKBUF_LOCK(&so->so_snd);
12694 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12695 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
12696 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
12697 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
12698 (unsigned int)SCTP_SB_LIMIT_SND(so),
12701 stcb->asoc.stream_queue_cnt,
12702 stcb->asoc.chunks_on_out_queue,
12703 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
12704 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12705 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
12708 stcb->block_entry = &be;
12709 error = sbwait(&so->so_snd);
12710 stcb->block_entry = NULL;
12711 if (error || so->so_error || be.error) {
12714 error = so->so_error;
12719 SOCKBUF_UNLOCK(&so->so_snd);
12722 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12723 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
12724 asoc, stcb->asoc.total_output_queue_size);
12726 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12729 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12731 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
12732 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12736 SOCKBUF_UNLOCK(&so->so_snd);
12739 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12743 * sndlen covers for mbuf case uio_resid covers for the non-mbuf
12744 * case NOTE: uio will be null when top/mbuf is passed
12747 if (srcv->sinfo_flags & SCTP_EOF) {
12748 got_all_of_the_send = 1;
12751 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12757 struct sctp_stream_queue_pending *sp;
12758 struct sctp_stream_out *strm;
12761 SCTP_TCB_SEND_LOCK(stcb);
12762 if ((asoc->stream_locked) &&
12763 (asoc->stream_locked_on != srcv->sinfo_stream)) {
12764 SCTP_TCB_SEND_UNLOCK(stcb);
12765 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
12769 SCTP_TCB_SEND_UNLOCK(stcb);
12771 strm = &stcb->asoc.strmout[srcv->sinfo_stream];
12772 if (strm->last_msg_incomplete == 0) {
12774 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
12775 if ((sp == NULL) || (error)) {
12778 SCTP_TCB_SEND_LOCK(stcb);
12779 if (sp->msg_is_complete) {
12780 strm->last_msg_incomplete = 0;
12781 asoc->stream_locked = 0;
12784 * Just got locked to this guy in case of an
12787 strm->last_msg_incomplete = 1;
12788 asoc->stream_locked = 1;
12789 asoc->stream_locked_on = srcv->sinfo_stream;
12790 sp->sender_all_done = 0;
12792 sctp_snd_sb_alloc(stcb, sp->length);
12793 atomic_add_int(&asoc->stream_queue_cnt, 1);
12794 if (srcv->sinfo_flags & SCTP_UNORDERED) {
12795 SCTP_STAT_INCR(sctps_sends_with_unord);
12797 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
12798 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
12799 SCTP_TCB_SEND_UNLOCK(stcb);
12801 SCTP_TCB_SEND_LOCK(stcb);
12802 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
12803 SCTP_TCB_SEND_UNLOCK(stcb);
12805 /* ???? Huh ??? last msg is gone */
12807 panic("Warning: Last msg marked incomplete, yet nothing left?");
12809 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
12810 strm->last_msg_incomplete = 0;
12816 while (uio->uio_resid > 0) {
12817 /* How much room do we have? */
12818 struct mbuf *new_tail, *mm;
12820 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12821 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
12825 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
12826 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
12827 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
12830 if (hold_tcblock) {
12831 SCTP_TCB_UNLOCK(stcb);
12834 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
12835 if ((mm == NULL) || error) {
12841 /* Update the mbuf and count */
12842 SCTP_TCB_SEND_LOCK(stcb);
12843 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
12845 * we need to get out. Peer probably
12849 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
12850 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
12851 error = ECONNRESET;
12853 SCTP_TCB_SEND_UNLOCK(stcb);
12856 if (sp->tail_mbuf) {
12857 /* tack it to the end */
12858 SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
12859 sp->tail_mbuf = new_tail;
12861 /* A stolen mbuf */
12863 sp->tail_mbuf = new_tail;
12865 sctp_snd_sb_alloc(stcb, sndout);
12866 atomic_add_int(&sp->length, sndout);
12869 /* Did we reach EOR? */
12870 if ((uio->uio_resid == 0) &&
12871 ((user_marks_eor == 0) ||
12872 (srcv->sinfo_flags & SCTP_EOF) ||
12873 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
12874 sp->msg_is_complete = 1;
12876 sp->msg_is_complete = 0;
12878 SCTP_TCB_SEND_UNLOCK(stcb);
12880 if (uio->uio_resid == 0) {
12885 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
12887 * This is ugly but we must assure locking
12890 if (hold_tcblock == 0) {
12891 SCTP_TCB_LOCK(stcb);
12894 sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
12895 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
12896 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
12897 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
12903 SCTP_TCB_UNLOCK(stcb);
12906 /* wait for space now */
12907 if (non_blocking) {
12908 /* Non-blocking io in place out */
12911 /* What about the INIT, send it maybe */
12912 if (queue_only_for_init) {
12913 if (hold_tcblock == 0) {
12914 SCTP_TCB_LOCK(stcb);
12917 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
12918 /* a collision took us forward? */
12921 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
12922 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
12926 if ((net->flight_size > net->cwnd) &&
12927 (asoc->sctp_cmt_on_off == 0)) {
12928 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
12930 } else if (asoc->ifp_had_enobuf) {
12931 SCTP_STAT_INCR(sctps_ifnomemqueued);
12932 if (net->flight_size > (2 * net->mtu)) {
12935 asoc->ifp_had_enobuf = 0;
12937 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
12938 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
12939 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
12940 (stcb->asoc.total_flight > 0) &&
12941 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
12942 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
12945 * Ok, Nagle is set on and we have data outstanding.
12946 * Don't send anything and let SACKs drive out the
12947 * data unless wen have a "full" segment to send.
12949 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12950 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
12952 SCTP_STAT_INCR(sctps_naglequeued);
12955 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
12956 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
12957 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
12959 SCTP_STAT_INCR(sctps_naglesent);
12962 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
12964 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
12965 nagle_applies, un_sent);
12966 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
12967 stcb->asoc.total_flight,
12968 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
12970 if (queue_only_for_init)
12971 queue_only_for_init = 0;
12972 if ((queue_only == 0) && (nagle_applies == 0)) {
12974 * need to start chunk output
12975 * before blocking.. note that if
12976 * a lock is already applied, then
12977 * the input via the net is happening
12978 * and I don't need to start output :-D
12980 if (hold_tcblock == 0) {
12981 if (SCTP_TCB_TRYLOCK(stcb)) {
12983 sctp_chunk_output(inp,
12985 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12988 sctp_chunk_output(inp,
12990 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
12992 if (hold_tcblock == 1) {
12993 SCTP_TCB_UNLOCK(stcb);
12997 SOCKBUF_LOCK(&so->so_snd);
12999 * This is a bit strange, but I think it will
13000 * work. The total_output_queue_size is locked and
13001 * protected by the TCB_LOCK, which we just released.
13002 * There is a race that can occur between releasing it
13003 * above, and me getting the socket lock, where sacks
13004 * come in but we have not put the SB_WAIT on the
13005 * so_snd buffer to get the wakeup. After the LOCK
13006 * is applied the sack_processing will also need to
13007 * LOCK the so->so_snd to do the actual sowwakeup(). So
13008 * once we have the socket buffer lock if we recheck the
13009 * size we KNOW we will get to sleep safely with the
13010 * wakeup flag in place.
13012 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
13013 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
13014 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13015 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
13016 asoc, uio->uio_resid);
13019 stcb->block_entry = &be;
13020 error = sbwait(&so->so_snd);
13021 stcb->block_entry = NULL;
13023 if (error || so->so_error || be.error) {
13026 error = so->so_error;
13031 SOCKBUF_UNLOCK(&so->so_snd);
13034 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13035 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
13036 asoc, stcb->asoc.total_output_queue_size);
13039 SOCKBUF_UNLOCK(&so->so_snd);
13040 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
13044 SCTP_TCB_SEND_LOCK(stcb);
13046 if (sp->msg_is_complete == 0) {
13047 strm->last_msg_incomplete = 1;
13048 asoc->stream_locked = 1;
13049 asoc->stream_locked_on = srcv->sinfo_stream;
13051 sp->sender_all_done = 1;
13052 strm->last_msg_incomplete = 0;
13053 asoc->stream_locked = 0;
13056 SCTP_PRINTF("Huh no sp TSNH?\n");
13057 strm->last_msg_incomplete = 0;
13058 asoc->stream_locked = 0;
13060 SCTP_TCB_SEND_UNLOCK(stcb);
13061 if (uio->uio_resid == 0) {
13062 got_all_of_the_send = 1;
13065 /* We send in a 0, since we do NOT have any locks */
13066 error = sctp_msg_append(stcb, net, top, srcv, 0);
13068 if (srcv->sinfo_flags & SCTP_EOF) {
13070 * This should only happen for Panda for the mbuf
13071 * send case, which does NOT yet support EEOR mode.
13072 * Thus, we can just set this flag to do the proper
13075 got_all_of_the_send = 1;
13083 if ((srcv->sinfo_flags & SCTP_EOF) &&
13084 (got_all_of_the_send == 1)) {
13087 SCTP_STAT_INCR(sctps_sends_with_eof);
13089 if (hold_tcblock == 0) {
13090 SCTP_TCB_LOCK(stcb);
13093 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
13094 if (TAILQ_EMPTY(&asoc->send_queue) &&
13095 TAILQ_EMPTY(&asoc->sent_queue) &&
13097 if (asoc->locked_on_sending) {
13100 /* there is nothing queued to send, so I'm done... */
13101 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13102 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13103 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13104 struct sctp_nets *netp;
13106 /* only send SHUTDOWN the first time through */
13107 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
13108 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
13110 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
13111 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
13112 sctp_stop_timers_for_shutdown(stcb);
13113 if (stcb->asoc.alternate) {
13114 netp = stcb->asoc.alternate;
13116 netp = stcb->asoc.primary_destination;
13118 sctp_send_shutdown(stcb, netp);
13119 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
13121 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13122 asoc->primary_destination);
13126 * we still got (or just got) data to send, so set
13130 * XXX sockets draft says that SCTP_EOF should be
13131 * sent with no data. currently, we will allow user
13132 * data to be sent first and move to
13135 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
13136 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
13137 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
13138 if (hold_tcblock == 0) {
13139 SCTP_TCB_LOCK(stcb);
13142 if (asoc->locked_on_sending) {
13143 /* Locked to send out the data */
13144 struct sctp_stream_queue_pending *sp;
13146 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
13148 if ((sp->length == 0) && (sp->msg_is_complete == 0))
13149 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
13152 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
13153 if (TAILQ_EMPTY(&asoc->send_queue) &&
13154 TAILQ_EMPTY(&asoc->sent_queue) &&
13155 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
13157 if (free_cnt_applied) {
13158 atomic_add_int(&stcb->asoc.refcnt, -1);
13159 free_cnt_applied = 0;
13161 sctp_abort_an_association(stcb->sctp_ep, stcb,
13162 NULL, SCTP_SO_LOCKED);
13164 * now relock the stcb so everything
13171 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
13172 asoc->primary_destination);
13173 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
13178 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
13179 some_on_control = 1;
13181 if (queue_only_for_init) {
13182 if (hold_tcblock == 0) {
13183 SCTP_TCB_LOCK(stcb);
13186 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
13187 /* a collision took us forward? */
13190 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
13191 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
13195 if ((net->flight_size > net->cwnd) &&
13196 (stcb->asoc.sctp_cmt_on_off == 0)) {
13197 SCTP_STAT_INCR(sctps_send_cwnd_avoid);
13199 } else if (asoc->ifp_had_enobuf) {
13200 SCTP_STAT_INCR(sctps_ifnomemqueued);
13201 if (net->flight_size > (2 * net->mtu)) {
13204 asoc->ifp_had_enobuf = 0;
13206 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
13207 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
13208 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
13209 (stcb->asoc.total_flight > 0) &&
13210 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
13211 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
13213 * Ok, Nagle is set on and we have data outstanding.
13214 * Don't send anything and let SACKs drive out the
13215 * data unless wen have a "full" segment to send.
13217 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13218 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
13220 SCTP_STAT_INCR(sctps_naglequeued);
13223 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
13224 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
13225 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
13227 SCTP_STAT_INCR(sctps_naglesent);
13230 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
13231 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
13232 nagle_applies, un_sent);
13233 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
13234 stcb->asoc.total_flight,
13235 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
13237 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
13238 /* we can attempt to send too. */
13239 if (hold_tcblock == 0) {
13241 * If there is activity recv'ing sacks no need to
13244 if (SCTP_TCB_TRYLOCK(stcb)) {
13245 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13249 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13251 } else if ((queue_only == 0) &&
13252 (stcb->asoc.peers_rwnd == 0) &&
13253 (stcb->asoc.total_flight == 0)) {
13254 /* We get to have a probe outstanding */
13255 if (hold_tcblock == 0) {
13257 SCTP_TCB_LOCK(stcb);
13259 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
13260 } else if (some_on_control) {
13261 int num_out, reason, frag_point;
13263 /* Here we do control only */
13264 if (hold_tcblock == 0) {
13266 SCTP_TCB_LOCK(stcb);
13268 frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
13269 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
13270 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
13272 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
13273 queue_only, stcb->asoc.peers_rwnd, un_sent,
13274 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
13275 stcb->asoc.total_output_queue_size, error);
13280 if (local_soresv && stcb) {
13281 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
13283 if (create_lock_applied) {
13284 SCTP_ASOC_CREATE_UNLOCK(inp);
13286 if ((stcb) && hold_tcblock) {
13287 SCTP_TCB_UNLOCK(stcb);
13289 if (stcb && free_cnt_applied) {
13290 atomic_add_int(&stcb->asoc.refcnt, -1);
13294 if (mtx_owned(&stcb->tcb_mtx)) {
13295 panic("Leaving with tcb mtx owned?");
13297 if (mtx_owned(&stcb->tcb_send_mtx)) {
13298 panic("Leaving with tcb send mtx owned?");
13304 sctp_validate_no_locks(inp);
13306 SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
13313 sctp_m_freem(control);
13320 * generate an AUTHentication chunk, if required
13323 sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
13324 struct sctp_auth_chunk **auth_ret, uint32_t * offset,
13325 struct sctp_tcb *stcb, uint8_t chunk)
13327 struct mbuf *m_auth;
13328 struct sctp_auth_chunk *auth;
13332 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
13336 if (stcb->asoc.auth_supported == 0) {
13339 /* does the requested chunk require auth? */
13340 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
13343 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
13344 if (m_auth == NULL) {
13348 /* reserve some space if this will be the first mbuf */
13350 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
13351 /* fill in the AUTH chunk details */
13352 auth = mtod(m_auth, struct sctp_auth_chunk *);
13353 bzero(auth, sizeof(*auth));
13354 auth->ch.chunk_type = SCTP_AUTHENTICATION;
13355 auth->ch.chunk_flags = 0;
13356 chunk_len = sizeof(*auth) +
13357 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
13358 auth->ch.chunk_length = htons(chunk_len);
13359 auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
13360 /* key id and hmac digest will be computed and filled in upon send */
13362 /* save the offset where the auth was inserted into the chain */
13364 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
13365 *offset += SCTP_BUF_LEN(cn);
13368 /* update length and return pointer to the auth chunk */
13369 SCTP_BUF_LEN(m_auth) = chunk_len;
13370 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
13371 if (auth_ret != NULL)
13379 sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
13381 struct nd_prefix *pfx = NULL;
13382 struct nd_pfxrouter *pfxrtr = NULL;
13383 struct sockaddr_in6 gw6;
13385 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
13388 /* get prefix entry of address */
13389 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
13390 if (pfx->ndpr_stateflags & NDPRF_DETACHED)
13392 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
13393 &src6->sin6_addr, &pfx->ndpr_mask))
13396 /* no prefix entry in the prefix list */
13398 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
13399 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13402 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
13403 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
13405 /* search installed gateway from prefix entry */
13406 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
13407 memset(&gw6, 0, sizeof(struct sockaddr_in6));
13408 gw6.sin6_family = AF_INET6;
13409 gw6.sin6_len = sizeof(struct sockaddr_in6);
13410 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
13411 sizeof(struct in6_addr));
13412 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
13413 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
13414 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
13415 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13416 if (sctp_cmpaddr((struct sockaddr *)&gw6,
13417 ro->ro_rt->rt_gateway)) {
13418 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
13422 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
13429 sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
13432 struct sockaddr_in *sin, *mask;
13433 struct ifaddr *ifa;
13434 struct in_addr srcnetaddr, gwnetaddr;
13436 if (ro == NULL || ro->ro_rt == NULL ||
13437 sifa->address.sa.sa_family != AF_INET) {
13440 ifa = (struct ifaddr *)sifa->ifa;
13441 mask = (struct sockaddr_in *)(ifa->ifa_netmask);
13442 sin = &sifa->address.sin;
13443 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13444 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
13445 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
13446 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
13448 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
13449 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
13450 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
13451 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
13452 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
13453 if (srcnetaddr.s_addr == gwnetaddr.s_addr) {